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/* |
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* Copyright (C) 2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
| 10 |
* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: cpu_x86.c,v 1.163 2005/06/26 22:23:42 debug Exp $ |
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* |
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* x86 (and amd64) CPU emulation. |
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* |
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* |
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* TODO: Pretty much everything that has to do with 64-bit and 32-bit modes, |
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* memory translation, flag bits, and so on. |
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* |
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* See http://www.amd.com/us-en/Processors/DevelopWithAMD/ |
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* 0,,30_2252_875_7044,00.html for more info on AMD64. |
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* |
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* http://www.cs.ucla.edu/~kohler/class/04f-aos/ref/i386/appa.htm has a |
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* nice overview of the standard i386 opcodes. |
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* |
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* HelpPC (http://members.tripod.com/~oldboard/assembly/) is also useful. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <ctype.h> |
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|
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#include "misc.h" |
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|
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|
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#ifndef ENABLE_X86 |
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|
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|
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#include "cpu_x86.h" |
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|
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/* (Bogus, when ENABLE_X86 isn't defined.) */ |
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int x86_cpu_family_init(struct cpu_family *fp) { return 0; } |
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|
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|
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#else /* ENABLE_X86 */ |
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|
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|
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#include "cpu.h" |
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#include "cpu_x86.h" |
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#include "devices.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "symbol.h" |
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|
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|
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extern volatile int single_step; |
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extern int old_show_trace_tree; |
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extern int old_instruction_trace; |
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extern int old_quiet_mode; |
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extern int quiet_mode; |
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|
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|
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static struct x86_model models[] = x86_models; |
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static char *reg_names[N_X86_REGS] = x86_reg_names; |
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static char *reg_names_bytes[8] = x86_reg_names_bytes; |
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static char *seg_names[N_X86_SEGS] = x86_seg_names; |
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static char *cond_names[N_X86_CONDS] = x86_cond_names; |
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|
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#define REP_REP 1 |
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#define REP_REPNE 2 |
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|
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|
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/* |
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* x86_cpu_new(): |
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* |
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* Create a new x86 cpu object. |
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*/ |
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int x86_cpu_new(struct cpu *cpu, struct memory *mem, struct machine *machine, |
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int cpu_id, char *cpu_type_name) |
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{ |
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int i = 0; |
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|
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/* Try to find a match: */ |
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while (models[i].model_number != 0) { |
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if (strcasecmp(cpu_type_name, models[i].name) == 0) |
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break; |
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i++; |
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} |
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|
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if (models[i].name == NULL) |
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return 0; |
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|
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cpu->memory_rw = x86_memory_rw; |
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cpu->byte_order = EMUL_LITTLE_ENDIAN; |
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|
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cpu->cd.x86.model = models[i]; |
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|
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/* Initial startup is in 16-bit real mode: */ |
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cpu->pc = 0xfff0; |
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|
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/* Initial segments: */ |
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cpu->cd.x86.descr_cache[X86_S_CS].valid = 1; |
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cpu->cd.x86.descr_cache[X86_S_CS].default_op_size = 16; |
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cpu->cd.x86.descr_cache[X86_S_CS].access_rights = 0x93; |
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cpu->cd.x86.descr_cache[X86_S_CS].base = 0xf0000; /* ffff0000 */ |
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cpu->cd.x86.descr_cache[X86_S_CS].limit = 0xffff; |
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cpu->cd.x86.descr_cache[X86_S_CS].descr_type = DESCR_TYPE_CODE; |
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cpu->cd.x86.descr_cache[X86_S_CS].readable = 1; |
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cpu->cd.x86.descr_cache[X86_S_CS].writable = 1; |
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cpu->cd.x86.descr_cache[X86_S_CS].granularity = 0; |
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cpu->cd.x86.s[X86_S_CS] = 0xf000; |
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|
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cpu->cd.x86.idtr = 0; |
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cpu->cd.x86.idtr_limit = 0x3ff; |
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|
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cpu->translate_address = translate_address_x86; |
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|
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cpu->cd.x86.rflags = 0x0002; |
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if (cpu->cd.x86.model.model_number == X86_MODEL_8086) |
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cpu->cd.x86.rflags |= 0xf000; |
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|
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/* Only show name and caches etc for CPU nr 0 (in SMP machines): */ |
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if (cpu_id == 0) { |
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debug("%s", cpu->name); |
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} |
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|
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return 1; |
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} |
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|
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|
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/* |
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* x86_cpu_dumpinfo(): |
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*/ |
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void x86_cpu_dumpinfo(struct cpu *cpu) |
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{ |
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debug(", currently in %s mode", PROTECTED_MODE? "protected" : "real"); |
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debug("\n"); |
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} |
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|
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|
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/* |
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* x86_cpu_list_available_types(): |
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* |
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* Print a list of available x86 CPU types. |
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*/ |
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void x86_cpu_list_available_types(void) |
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{ |
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int i = 0, j; |
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|
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while (models[i].model_number != 0) { |
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debug("%s", models[i].name); |
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|
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for (j=0; j<10-strlen(models[i].name); j++) |
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debug(" "); |
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i++; |
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if ((i % 6) == 0 || models[i].name == NULL) |
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debug("\n"); |
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} |
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} |
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|
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|
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/* |
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* x86_cpu_register_dump(): |
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* |
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* Dump cpu registers in a relatively readable format. |
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* (gprs and coprocs are mostly useful for the MIPS version of this function.) |
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*/ |
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void x86_cpu_register_dump(struct cpu *cpu, int gprs, int coprocs) |
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{ |
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char *symbol; |
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uint64_t offset; |
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int i, x = cpu->cpu_id; |
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|
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if (REAL_MODE) { |
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/* Real-mode: */ |
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debug("cpu%i: cs:ip = 0x%04x:0x%04x\n", x, |
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cpu->cd.x86.s[X86_S_CS], (int)cpu->pc); |
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|
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debug("cpu%i: ax = 0x%04x bx = 0x%04x cx = 0x%04x dx = " |
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"0x%04x\n", x, |
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(int)cpu->cd.x86.r[X86_R_AX], (int)cpu->cd.x86.r[X86_R_BX], |
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(int)cpu->cd.x86.r[X86_R_CX], (int)cpu->cd.x86.r[X86_R_DX]); |
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debug("cpu%i: si = 0x%04x di = 0x%04x bp = 0x%04x sp = " |
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"0x%04x\n", x, |
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(int)cpu->cd.x86.r[X86_R_SI], (int)cpu->cd.x86.r[X86_R_DI], |
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(int)cpu->cd.x86.r[X86_R_BP], (int)cpu->cd.x86.r[X86_R_SP]); |
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|
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debug("cpu%i: ds = 0x%04x es = 0x%04x ss = 0x%04x flags " |
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"= 0x%04x\n", x, |
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(int)cpu->cd.x86.s[X86_S_DS], (int)cpu->cd.x86.s[X86_S_ES], |
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(int)cpu->cd.x86.s[X86_S_SS], (int)cpu->cd.x86.rflags); |
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} else { |
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symbol = get_symbol_name(&cpu->machine->symbol_context, |
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cpu->pc, &offset); |
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|
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debug("cpu%i: eip=0x", x); |
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debug("%08x", (int)cpu->pc); |
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debug(" <%s>\n", symbol != NULL? symbol : " no symbol "); |
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|
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debug("cpu%i: eax=0x%08x ebx=0x%08x ecx=0x%08x edx=" |
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"0x%08x\n", x, |
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(int)cpu->cd.x86.r[X86_R_AX], (int)cpu->cd.x86.r[X86_R_BX], |
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(int)cpu->cd.x86.r[X86_R_CX], (int)cpu->cd.x86.r[X86_R_DX]); |
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debug("cpu%i: esi=0x%08x edi=0x%08x ebp=0x%08x esp=" |
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"0x%08x\n", x, |
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(int)cpu->cd.x86.r[X86_R_SI], (int)cpu->cd.x86.r[X86_R_DI], |
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(int)cpu->cd.x86.r[X86_R_BP], (int)cpu->cd.x86.r[X86_R_SP]); |
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#if 0 |
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} else { |
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/* 64-bit */ |
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symbol = get_symbol_name(&cpu->machine->symbol_context, |
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cpu->pc, &offset); |
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|
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debug("cpu%i: rip = 0x", x); |
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debug("%016llx", (long long)cpu->pc); |
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debug(" <%s>\n", symbol != NULL? symbol : " no symbol "); |
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|
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for (i=0; i<N_X86_REGS; i++) { |
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if ((i & 1) == 0) |
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debug("cpu%i:", x); |
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debug(" r%s = 0x%016llx", reg_names[i], |
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(long long)cpu->cd.x86.r[i]); |
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if ((i & 1) == 1) |
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debug("\n"); |
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} |
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#endif |
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} |
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|
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if (coprocs != 0) { |
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for (i=0; i<6; i++) { |
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debug("cpu%i: %s=0x%04x (", x, seg_names[i], |
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cpu->cd.x86.s[i]); |
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if (cpu->cd.x86.descr_cache[i].valid) { |
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debug("base=0x%08x, limit=0x%08x, ", |
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(int)cpu->cd.x86.descr_cache[i].base, |
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(int)cpu->cd.x86.descr_cache[i].limit); |
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debug("%s", cpu->cd.x86.descr_cache[i]. |
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descr_type==DESCR_TYPE_CODE?"CODE":"DATA"); |
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debug(", %i-bit", cpu->cd.x86.descr_cache[i]. |
| 257 |
default_op_size); |
| 258 |
debug(", %s%s", cpu->cd.x86.descr_cache[i]. |
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readable? "R" : "-", cpu->cd.x86. |
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descr_cache[i].writable? "W" : "-"); |
| 261 |
} else |
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debug("invalid"); |
| 263 |
debug(")\n"); |
| 264 |
} |
| 265 |
debug("cpu%i: gdtr=0x%08llx:0x%04x idtr=0x%08llx:0x%04x " |
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" ldtr=0x%08x:0x%04x\n", x, (long long)cpu->cd.x86.gdtr, |
| 267 |
(int)cpu->cd.x86.gdtr_limit, (long long)cpu->cd.x86.idtr, |
| 268 |
(int)cpu->cd.x86.idtr_limit, (long long)cpu->cd.x86. |
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ldtr_base, (int)cpu->cd.x86.ldtr_limit); |
| 270 |
debug("cpu%i: pic1: irr=0x%02x ier=0x%02x isr=0x%02x " |
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"base=0x%02x\n", x, cpu->machine->md.pc.pic1->irr, |
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cpu->machine->md.pc.pic1->ier,cpu->machine->md.pc.pic1->isr, |
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cpu->machine->md.pc.pic1->irq_base); |
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debug("cpu%i: pic2: irr=0x%02x ier=0x%02x isr=0x%02x " |
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"base=0x%02x\n", x, cpu->machine->md.pc.pic2->irr, |
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cpu->machine->md.pc.pic2->ier,cpu->machine->md.pc.pic2->isr, |
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cpu->machine->md.pc.pic2->irq_base); |
| 278 |
} else if (PROTECTED_MODE) { |
| 279 |
/* Protected mode: */ |
| 280 |
debug("cpu%i: cs=0x%04x ds=0x%04x es=0x%04x " |
| 281 |
"fs=0x%04x gs=0x%04x ss=0x%04x\n", x, |
| 282 |
(int)cpu->cd.x86.s[X86_S_CS], (int)cpu->cd.x86.s[X86_S_DS], |
| 283 |
(int)cpu->cd.x86.s[X86_S_ES], (int)cpu->cd.x86.s[X86_S_FS], |
| 284 |
(int)cpu->cd.x86.s[X86_S_GS], (int)cpu->cd.x86.s[X86_S_SS]); |
| 285 |
} |
| 286 |
|
| 287 |
if (PROTECTED_MODE) { |
| 288 |
/* Protected mode: */ |
| 289 |
debug("cpu%i: cr0=0x%08x cr2=0x%08x cr3=0x%08x eflags=" |
| 290 |
"0x%08x\n", x, (int)cpu->cd.x86.cr[0], |
| 291 |
(int)cpu->cd.x86.cr[2], (int)cpu->cd.x86.cr[3], |
| 292 |
(int)cpu->cd.x86.rflags); |
| 293 |
debug("cpu%i: tr = 0x%04x (base=0x%llx, limit=0x%x)\n", |
| 294 |
x, (int)cpu->cd.x86.tr, (long long)cpu->cd.x86.tr_base, |
| 295 |
(int)cpu->cd.x86.tr_limit); |
| 296 |
} |
| 297 |
} |
| 298 |
|
| 299 |
|
| 300 |
/* |
| 301 |
* x86_cpu_register_match(): |
| 302 |
*/ |
| 303 |
void x86_cpu_register_match(struct machine *m, char *name, |
| 304 |
int writeflag, uint64_t *valuep, int *mr) |
| 305 |
{ |
| 306 |
int cpunr = 0; |
| 307 |
int r; |
| 308 |
|
| 309 |
/* CPU number: TODO */ |
| 310 |
|
| 311 |
if (strcasecmp(name, "pc") == 0 || strcasecmp(name, "rip") == 0) { |
| 312 |
if (writeflag) { |
| 313 |
m->cpus[cpunr]->pc = *valuep; |
| 314 |
m->cpus[cpunr]->cd.x86.halted = 0; |
| 315 |
} else |
| 316 |
*valuep = m->cpus[cpunr]->pc; |
| 317 |
*mr = 1; |
| 318 |
return; |
| 319 |
} |
| 320 |
if (strcasecmp(name, "ip") == 0) { |
| 321 |
if (writeflag) { |
| 322 |
m->cpus[cpunr]->pc = (m->cpus[cpunr]->pc & ~0xffff) |
| 323 |
| (*valuep & 0xffff); |
| 324 |
m->cpus[cpunr]->cd.x86.halted = 0; |
| 325 |
} else |
| 326 |
*valuep = m->cpus[cpunr]->pc & 0xffff; |
| 327 |
*mr = 1; |
| 328 |
return; |
| 329 |
} |
| 330 |
if (strcasecmp(name, "eip") == 0) { |
| 331 |
if (writeflag) { |
| 332 |
m->cpus[cpunr]->pc = *valuep; |
| 333 |
m->cpus[cpunr]->cd.x86.halted = 0; |
| 334 |
} else |
| 335 |
*valuep = m->cpus[cpunr]->pc & 0xffffffffULL; |
| 336 |
*mr = 1; |
| 337 |
return; |
| 338 |
} |
| 339 |
|
| 340 |
if (strcasecmp(name, "rflags") == 0) { |
| 341 |
if (writeflag) |
| 342 |
m->cpus[cpunr]->cd.x86.rflags = *valuep; |
| 343 |
else |
| 344 |
*valuep = m->cpus[cpunr]->cd.x86.rflags; |
| 345 |
*mr = 1; |
| 346 |
return; |
| 347 |
} |
| 348 |
if (strcasecmp(name, "eflags") == 0) { |
| 349 |
if (writeflag) |
| 350 |
m->cpus[cpunr]->cd.x86.rflags = (m->cpus[cpunr]-> |
| 351 |
cd.x86.rflags & ~0xffffffffULL) | (*valuep & |
| 352 |
0xffffffffULL); |
| 353 |
else |
| 354 |
*valuep = m->cpus[cpunr]->cd.x86.rflags & 0xffffffffULL; |
| 355 |
*mr = 1; |
| 356 |
return; |
| 357 |
} |
| 358 |
if (strcasecmp(name, "flags") == 0) { |
| 359 |
if (writeflag) |
| 360 |
m->cpus[cpunr]->cd.x86.rflags = (m->cpus[cpunr]-> |
| 361 |
cd.x86.rflags & ~0xffff) | (*valuep & 0xffff); |
| 362 |
else |
| 363 |
*valuep = m->cpus[cpunr]->cd.x86.rflags & 0xffff; |
| 364 |
*mr = 1; |
| 365 |
return; |
| 366 |
} |
| 367 |
|
| 368 |
/* 8-bit low: */ |
| 369 |
for (r=0; r<4; r++) |
| 370 |
if (strcasecmp(name, reg_names_bytes[r]) == 0) { |
| 371 |
if (writeflag) |
| 372 |
m->cpus[cpunr]->cd.x86.r[r] = |
| 373 |
(m->cpus[cpunr]->cd.x86.r[r] & ~0xff) |
| 374 |
| (*valuep & 0xff); |
| 375 |
else |
| 376 |
*valuep = m->cpus[cpunr]->cd.x86.r[r] & 0xff; |
| 377 |
*mr = 1; |
| 378 |
return; |
| 379 |
} |
| 380 |
|
| 381 |
/* 8-bit high: */ |
| 382 |
for (r=0; r<4; r++) |
| 383 |
if (strcasecmp(name, reg_names_bytes[r+4]) == 0) { |
| 384 |
if (writeflag) |
| 385 |
m->cpus[cpunr]->cd.x86.r[r] = |
| 386 |
(m->cpus[cpunr]->cd.x86.r[r] & ~0xff00) |
| 387 |
| ((*valuep & 0xff) << 8); |
| 388 |
else |
| 389 |
*valuep = (m->cpus[cpunr]->cd.x86.r[r] >> |
| 390 |
8) & 0xff; |
| 391 |
*mr = 1; |
| 392 |
return; |
| 393 |
} |
| 394 |
|
| 395 |
/* 16-, 32-, 64-bit registers: */ |
| 396 |
for (r=0; r<N_X86_REGS; r++) { |
| 397 |
/* 16-bit: */ |
| 398 |
if (r<8 && strcasecmp(name, reg_names[r]) == 0) { |
| 399 |
if (writeflag) |
| 400 |
m->cpus[cpunr]->cd.x86.r[r] = |
| 401 |
(m->cpus[cpunr]->cd.x86.r[r] & ~0xffff) |
| 402 |
| (*valuep & 0xffff); |
| 403 |
else |
| 404 |
*valuep = m->cpus[cpunr]->cd.x86.r[r] & 0xffff; |
| 405 |
*mr = 1; |
| 406 |
return; |
| 407 |
} |
| 408 |
|
| 409 |
/* 32-bit: */ |
| 410 |
if (r<8 && (name[0]=='e' || name[0]=='E') && |
| 411 |
strcasecmp(name+1, reg_names[r]) == 0) { |
| 412 |
if (writeflag) |
| 413 |
m->cpus[cpunr]->cd.x86.r[r] = |
| 414 |
*valuep & 0xffffffffULL; |
| 415 |
else |
| 416 |
*valuep = m->cpus[cpunr]->cd.x86.r[r] & |
| 417 |
0xffffffffULL; |
| 418 |
*mr = 1; |
| 419 |
return; |
| 420 |
} |
| 421 |
|
| 422 |
/* 64-bit: */ |
| 423 |
if ((name[0]=='r' || name[0]=='R') && |
| 424 |
strcasecmp(name+1, reg_names[r]) == 0) { |
| 425 |
if (writeflag) |
| 426 |
m->cpus[cpunr]->cd.x86.r[r] = *valuep; |
| 427 |
else |
| 428 |
*valuep = m->cpus[cpunr]->cd.x86.r[r]; |
| 429 |
*mr = 1; |
| 430 |
return; |
| 431 |
} |
| 432 |
} |
| 433 |
|
| 434 |
/* segment names: */ |
| 435 |
for (r=0; r<N_X86_SEGS; r++) { |
| 436 |
if (strcasecmp(name, seg_names[r]) == 0) { |
| 437 |
if (writeflag) |
| 438 |
m->cpus[cpunr]->cd.x86.s[r] = |
| 439 |
(m->cpus[cpunr]->cd.x86.s[r] & ~0xffff) |
| 440 |
| (*valuep & 0xffff); |
| 441 |
else |
| 442 |
*valuep = m->cpus[cpunr]->cd.x86.s[r] & 0xffff; |
| 443 |
*mr = 1; |
| 444 |
return; |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
/* control registers: (TODO: 32- vs 64-bit on AMD64?) */ |
| 449 |
if (strncasecmp(name, "cr", 2) == 0 && atoi(name+2) < N_X86_CREGS ) { |
| 450 |
int r = atoi(name+2); |
| 451 |
if (writeflag) |
| 452 |
m->cpus[cpunr]->cd.x86.cr[r] = *valuep; |
| 453 |
else |
| 454 |
*valuep = m->cpus[cpunr]->cd.x86.cr[r]; |
| 455 |
*mr = 1; |
| 456 |
return; |
| 457 |
} |
| 458 |
} |
| 459 |
|
| 460 |
|
| 461 |
/* Macro which modifies the lower part of a value, or the entire value, |
| 462 |
depending on 'mode': */ |
| 463 |
#define modify(old,new) ( \ |
| 464 |
mode==16? ( \ |
| 465 |
((old) & ~0xffff) + ((new) & 0xffff) \ |
| 466 |
) : ((new) & 0xffffffffULL) ) |
| 467 |
|
| 468 |
/* "volatile" here, because some versions of gcc with -O3 on i386 are buggy */ |
| 469 |
#define HEXPRINT(x,n) { volatile int j; for (j=0; j<(n); j++) \ |
| 470 |
debug("%02x",(x)[j]); } |
| 471 |
#define HEXSPACES(i) { int j; j = (i)>10? 10:(i); while (j++<10) debug(" "); \ |
| 472 |
debug(" "); } |
| 473 |
#define SPACES HEXSPACES(ilen) |
| 474 |
|
| 475 |
|
| 476 |
static uint32_t read_imm_common(unsigned char **instrp, uint64_t *ilenp, |
| 477 |
int len, int printflag) |
| 478 |
{ |
| 479 |
uint32_t imm; |
| 480 |
unsigned char *instr = *instrp; |
| 481 |
|
| 482 |
if (len == 8) |
| 483 |
imm = instr[0]; |
| 484 |
else if (len == 16) |
| 485 |
imm = instr[0] + (instr[1] << 8); |
| 486 |
else |
| 487 |
imm = instr[0] + (instr[1] << 8) + |
| 488 |
(instr[2] << 16) + (instr[3] << 24); |
| 489 |
|
| 490 |
if (printflag) |
| 491 |
HEXPRINT(instr, len / 8); |
| 492 |
|
| 493 |
if (ilenp != NULL) |
| 494 |
(*ilenp) += len/8; |
| 495 |
|
| 496 |
(*instrp) += len/8; |
| 497 |
return imm; |
| 498 |
} |
| 499 |
|
| 500 |
|
| 501 |
static uint32_t read_imm_and_print(unsigned char **instrp, uint64_t *ilenp, |
| 502 |
int mode) |
| 503 |
{ |
| 504 |
return read_imm_common(instrp, ilenp, mode, 1); |
| 505 |
} |
| 506 |
|
| 507 |
|
| 508 |
static uint32_t read_imm(unsigned char **instrp, uint64_t *newpcp, |
| 509 |
int mode) |
| 510 |
{ |
| 511 |
return read_imm_common(instrp, newpcp, mode, 0); |
| 512 |
} |
| 513 |
|
| 514 |
|
| 515 |
static void print_csip(struct cpu *cpu) |
| 516 |
{ |
| 517 |
fatal("0x%04x:", cpu->cd.x86.s[X86_S_CS]); |
| 518 |
if (PROTECTED_MODE) |
| 519 |
fatal("0x%llx", (long long)cpu->pc); |
| 520 |
else |
| 521 |
fatal("0x%04x", (int)cpu->pc); |
| 522 |
} |
| 523 |
|
| 524 |
|
| 525 |
/* |
| 526 |
* x86_cpu_interrupt(): |
| 527 |
* |
| 528 |
* NOTE: Interacting with the 8259 PIC is done in src/machine.c. |
| 529 |
*/ |
| 530 |
int x86_cpu_interrupt(struct cpu *cpu, uint64_t nr) |
| 531 |
{ |
| 532 |
if (cpu->machine->md_interrupt != NULL) |
| 533 |
cpu->machine->md_interrupt(cpu->machine, cpu, nr, 1); |
| 534 |
else { |
| 535 |
fatal("x86_cpu_interrupt(): no md_interrupt()?\n"); |
| 536 |
return 1; |
| 537 |
} |
| 538 |
|
| 539 |
return 1; |
| 540 |
} |
| 541 |
|
| 542 |
|
| 543 |
/* |
| 544 |
* x86_cpu_interrupt_ack(): |
| 545 |
* |
| 546 |
* NOTE: Interacting with the 8259 PIC is done in src/machine.c. |
| 547 |
*/ |
| 548 |
int x86_cpu_interrupt_ack(struct cpu *cpu, uint64_t nr) |
| 549 |
{ |
| 550 |
if (cpu->machine->md_interrupt != NULL) |
| 551 |
cpu->machine->md_interrupt(cpu->machine, cpu, nr, 0); |
| 552 |
else { |
| 553 |
fatal("x86_cpu_interrupt(): no md_interrupt()?\n"); |
| 554 |
return 1; |
| 555 |
} |
| 556 |
|
| 557 |
return 1; |
| 558 |
} |
| 559 |
|
| 560 |
|
| 561 |
/* (NOTE: Don't use the lowest 3 bits in these defines) */ |
| 562 |
#define RELOAD_TR 0x1000 |
| 563 |
#define RELOAD_LDTR 0x1008 |
| 564 |
|
| 565 |
|
| 566 |
/* |
| 567 |
* x86_task_switch(): |
| 568 |
* |
| 569 |
* Save away current state into the current task state segment, and |
| 570 |
* load the new state from the new task. |
| 571 |
* |
| 572 |
* TODO: 16-bit TSS, etc. And clean up all of this :) |
| 573 |
* |
| 574 |
* TODO: Link word. AMD64 stuff. And lots more. |
| 575 |
*/ |
| 576 |
void x86_task_switch(struct cpu *cpu, int new_tr, uint64_t *curpc) |
| 577 |
{ |
| 578 |
unsigned char old_descr[8]; |
| 579 |
unsigned char new_descr[8]; |
| 580 |
uint32_t value, ofs; |
| 581 |
int i; |
| 582 |
unsigned char buf[4]; |
| 583 |
|
| 584 |
fatal("x86_task_switch():\n"); |
| 585 |
cpu->pc = *curpc; |
| 586 |
|
| 587 |
if (!cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.gdtr + cpu->cd.x86.tr, |
| 588 |
old_descr, sizeof(old_descr), MEM_READ, NO_SEGMENTATION)) { |
| 589 |
fatal("x86_task_switch(): TODO: 1\n"); |
| 590 |
cpu->running = 0; |
| 591 |
return; |
| 592 |
} |
| 593 |
|
| 594 |
/* Check the busy bit, and then clear it: */ |
| 595 |
if (!(old_descr[5] & 0x02)) { |
| 596 |
fatal("x86_task_switch(): TODO: switching FROM a non-BUSY" |
| 597 |
" TSS descriptor?\n"); |
| 598 |
cpu->running = 0; |
| 599 |
return; |
| 600 |
} |
| 601 |
old_descr[5] &= ~0x02; |
| 602 |
if (!cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.gdtr + cpu->cd.x86.tr, |
| 603 |
old_descr, sizeof(old_descr), MEM_WRITE, NO_SEGMENTATION)) { |
| 604 |
fatal("x86_task_switch(): TODO: could not clear busy bit\n"); |
| 605 |
cpu->running = 0; |
| 606 |
return; |
| 607 |
} |
| 608 |
|
| 609 |
x86_cpu_register_dump(cpu, 1, 1); |
| 610 |
|
| 611 |
/* Set the task-switched bit in CR0: */ |
| 612 |
cpu->cd.x86.cr[0] |= X86_CR0_TS; |
| 613 |
|
| 614 |
/* Save away all the old registers: */ |
| 615 |
#define WRITE_VALUE { buf[0]=value; buf[1]=value>>8; buf[2]=value>>16; \ |
| 616 |
buf[3]=value>>24; cpu->memory_rw(cpu, cpu->mem, \ |
| 617 |
cpu->cd.x86.tr_base + ofs, buf, sizeof(buf), MEM_WRITE, \ |
| 618 |
NO_SEGMENTATION); } |
| 619 |
|
| 620 |
ofs = 0x1c; value = cpu->cd.x86.cr[3]; WRITE_VALUE; |
| 621 |
ofs = 0x20; value = cpu->pc; WRITE_VALUE; |
| 622 |
ofs = 0x24; value = cpu->cd.x86.rflags; WRITE_VALUE; |
| 623 |
for (i=0; i<N_X86_REGS; i++) { |
| 624 |
ofs = 0x28+i*4; value = cpu->cd.x86.r[i]; WRITE_VALUE; |
| 625 |
} |
| 626 |
for (i=0; i<6; i++) { |
| 627 |
ofs = 0x48+i*4; value = cpu->cd.x86.s[i]; WRITE_VALUE; |
| 628 |
} |
| 629 |
|
| 630 |
fatal("-------\n"); |
| 631 |
|
| 632 |
if ((cpu->cd.x86.tr & 0xfffc) == 0) { |
| 633 |
fatal("TODO: x86_task_switch(): task switch, but old TR" |
| 634 |
" was 0?\n"); |
| 635 |
cpu->running = 0; |
| 636 |
return; |
| 637 |
} |
| 638 |
|
| 639 |
if (!cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.gdtr + new_tr, |
| 640 |
new_descr, sizeof(new_descr), MEM_READ, NO_SEGMENTATION)) { |
| 641 |
fatal("x86_task_switch(): TODO: 1\n"); |
| 642 |
cpu->running = 0; |
| 643 |
return; |
| 644 |
} |
| 645 |
if (new_descr[5] & 0x02) { |
| 646 |
fatal("x86_task_switch(): TODO: switching TO an already BUSY" |
| 647 |
" TSS descriptor?\n"); |
| 648 |
cpu->running = 0; |
| 649 |
return; |
| 650 |
} |
| 651 |
|
| 652 |
reload_segment_descriptor(cpu, RELOAD_TR, new_tr, NULL); |
| 653 |
|
| 654 |
if (cpu->cd.x86.tr_limit < 0x67) |
| 655 |
fatal("WARNING: tr_limit = 0x%x, must be at least 0x67!\n", |
| 656 |
(int)cpu->cd.x86.tr_limit); |
| 657 |
|
| 658 |
/* Read new registers: */ |
| 659 |
#define READ_VALUE { cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.tr_base + \ |
| 660 |
ofs, buf, sizeof(buf), MEM_READ, NO_SEGMENTATION); \ |
| 661 |
value = buf[0] + (buf[1] << 8) + (buf[2] << 16) + (buf[3] << 24); } |
| 662 |
|
| 663 |
ofs = 0x1c; READ_VALUE; cpu->cd.x86.cr[3] = value; |
| 664 |
ofs = 0x20; READ_VALUE; cpu->pc = value; |
| 665 |
ofs = 0x24; READ_VALUE; cpu->cd.x86.rflags = value; |
| 666 |
for (i=0; i<N_X86_REGS; i++) { |
| 667 |
ofs = 0x28+i*4; READ_VALUE; cpu->cd.x86.r[i] = value; |
| 668 |
} |
| 669 |
for (i=0; i<6; i++) { |
| 670 |
ofs = 0x48+i*4; READ_VALUE; |
| 671 |
reload_segment_descriptor(cpu, i, value, NULL); |
| 672 |
} |
| 673 |
ofs = 0x60; READ_VALUE; value &= 0xffff; |
| 674 |
reload_segment_descriptor(cpu, RELOAD_LDTR, value, NULL); |
| 675 |
|
| 676 |
if ((cpu->cd.x86.s[X86_S_CS] & X86_PL_MASK) != |
| 677 |
(cpu->cd.x86.s[X86_S_SS] & X86_PL_MASK)) |
| 678 |
fatal("WARNING: rpl in CS and SS differ!\n"); |
| 679 |
|
| 680 |
if ((cpu->cd.x86.s[X86_S_CS] & X86_PL_MASK) == X86_RING3 && |
| 681 |
!(cpu->cd.x86.rflags & X86_FLAGS_IF)) |
| 682 |
fatal("WARNING (?): switching to userland task, but interrupts" |
| 683 |
" are disabled?\n"); |
| 684 |
|
| 685 |
x86_cpu_register_dump(cpu, 1, 1); |
| 686 |
fatal("-------\n"); |
| 687 |
|
| 688 |
*curpc = cpu->pc; |
| 689 |
|
| 690 |
/* cpu->machine->instruction_trace = 1; */ |
| 691 |
/* cpu->running = 0; */ |
| 692 |
} |
| 693 |
|
| 694 |
|
| 695 |
/* |
| 696 |
* reload_segment_descriptor(): |
| 697 |
* |
| 698 |
* Loads base, limit and other settings from the Global Descriptor Table into |
| 699 |
* segment descriptors. |
| 700 |
* |
| 701 |
* This function can also be used to reload the TR (task register). |
| 702 |
* |
| 703 |
* And also to do a task switch, or jump into a trap handler etc. |
| 704 |
* (Perhaps this function should be renamed.) |
| 705 |
*/ |
| 706 |
void reload_segment_descriptor(struct cpu *cpu, int segnr, int selector, |
| 707 |
uint64_t *curpcp) |
| 708 |
{ |
| 709 |
int res, i, readable, writable, granularity, descr_type; |
| 710 |
int segment = 1, rpl, orig_selector = selector; |
| 711 |
unsigned char descr[8]; |
| 712 |
char *table_name = "GDT"; |
| 713 |
uint64_t base, limit, table_base, table_limit; |
| 714 |
|
| 715 |
if (segnr > 0x100) /* arbitrary, larger than N_X86_SEGS */ |
| 716 |
segment = 0; |
| 717 |
|
| 718 |
if (segment && (segnr < 0 || segnr >= N_X86_SEGS)) { |
| 719 |
fatal("reload_segment_descriptor(): segnr = %i\n", segnr); |
| 720 |
exit(1); |
| 721 |
} |
| 722 |
|
| 723 |
if (segment && REAL_MODE) { |
| 724 |
/* Real mode: */ |
| 725 |
cpu->cd.x86.descr_cache[segnr].valid = 1; |
| 726 |
cpu->cd.x86.descr_cache[segnr].default_op_size = 16; |
| 727 |
cpu->cd.x86.descr_cache[segnr].access_rights = 0x93; |
| 728 |
cpu->cd.x86.descr_cache[segnr].descr_type = |
| 729 |
segnr == X86_S_CS? DESCR_TYPE_CODE : DESCR_TYPE_DATA; |
| 730 |
cpu->cd.x86.descr_cache[segnr].readable = 1; |
| 731 |
cpu->cd.x86.descr_cache[segnr].writable = 1; |
| 732 |
cpu->cd.x86.descr_cache[segnr].granularity = 0; |
| 733 |
cpu->cd.x86.descr_cache[segnr].base = selector << 4; |
| 734 |
cpu->cd.x86.descr_cache[segnr].limit = 0xffff; |
| 735 |
cpu->cd.x86.s[segnr] = selector; |
| 736 |
return; |
| 737 |
} |
| 738 |
|
| 739 |
/* |
| 740 |
* Protected mode: Load the descriptor cache from the GDT. |
| 741 |
*/ |
| 742 |
|
| 743 |
table_base = cpu->cd.x86.gdtr; |
| 744 |
table_limit = cpu->cd.x86.gdtr_limit; |
| 745 |
if (selector & 4) { |
| 746 |
table_name = "LDT"; |
| 747 |
/* fatal("TODO: x86 translation via LDT: 0x%04x\n", |
| 748 |
selector); */ |
| 749 |
table_base = cpu->cd.x86.ldtr_base; |
| 750 |
table_limit = cpu->cd.x86.ldtr_limit; |
| 751 |
} |
| 752 |
|
| 753 |
/* Special case: Null-descriptor: */ |
| 754 |
if (segment && (selector & ~3) == 0) { |
| 755 |
cpu->cd.x86.descr_cache[segnr].valid = 0; |
| 756 |
cpu->cd.x86.s[segnr] = selector; |
| 757 |
return; |
| 758 |
} |
| 759 |
|
| 760 |
rpl = selector & 3; |
| 761 |
|
| 762 |
/* TODO: check rpl */ |
| 763 |
|
| 764 |
selector &= ~7; |
| 765 |
|
| 766 |
if (selector + 7 > table_limit) { |
| 767 |
fatal("TODO: selector 0x%04x outside %s limit (0x%04x)\n", |
| 768 |
selector, table_name, (int)table_limit); |
| 769 |
cpu->running = 0; |
| 770 |
return; |
| 771 |
} |
| 772 |
|
| 773 |
res = cpu->memory_rw(cpu, cpu->mem, table_base + selector, |
| 774 |
descr, sizeof(descr), MEM_READ, NO_SEGMENTATION); |
| 775 |
if (!res) { |
| 776 |
fatal("reload_segment_descriptor(): TODO: " |
| 777 |
"could not read the GDT\n"); |
| 778 |
cpu->running = 0; |
| 779 |
return; |
| 780 |
} |
| 781 |
|
| 782 |
base = descr[2] + (descr[3] << 8) + (descr[4] << 16) + |
| 783 |
(descr[7] << 24); |
| 784 |
limit = descr[0] + (descr[1] << 8) + ((descr[6]&15) << 16); |
| 785 |
|
| 786 |
descr_type = readable = writable = granularity = 0; |
| 787 |
granularity = (descr[6] & 0x80)? 1 : 0; |
| 788 |
if (limit == 0) { |
| 789 |
fatal("WARNING: descriptor limit = 0\n"); |
| 790 |
limit = 0xfffff; |
| 791 |
} |
| 792 |
if (granularity) |
| 793 |
limit = (limit << 12) | 0xfff; |
| 794 |
|
| 795 |
#if 0 |
| 796 |
printf("base = %llx\n",(long long)base); |
| 797 |
for (i=0; i<8; i++) |
| 798 |
fatal(" %02x", descr[i]); |
| 799 |
#endif |
| 800 |
|
| 801 |
if (selector != 0x0000 && (descr[5] & 0x80) == 0x00) { |
| 802 |
fatal("TODO: nonpresent descriptor?\n"); |
| 803 |
goto fail_dump; |
| 804 |
} |
| 805 |
|
| 806 |
if (!segment) { |
| 807 |
switch (segnr) { |
| 808 |
case RELOAD_TR: |
| 809 |
/* Check that this is indeed a TSS descriptor: */ |
| 810 |
if ((descr[5] & 0x15) != 0x01) { |
| 811 |
fatal("TODO: load TR but entry in table is" |
| 812 |
" not a TSS descriptor?\n"); |
| 813 |
goto fail_dump; |
| 814 |
} |
| 815 |
|
| 816 |
/* Reload the task register: */ |
| 817 |
cpu->cd.x86.tr = selector; |
| 818 |
cpu->cd.x86.tr_base = base; |
| 819 |
cpu->cd.x86.tr_limit = limit; |
| 820 |
|
| 821 |
/* Mark the TSS as busy: */ |
| 822 |
descr[5] |= 0x02; |
| 823 |
res = cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.gdtr + |
| 824 |
selector, descr, sizeof(descr), MEM_WRITE, |
| 825 |
NO_SEGMENTATION); |
| 826 |
break; |
| 827 |
case RELOAD_LDTR: |
| 828 |
/* Reload the Local Descriptor Table register: */ |
| 829 |
cpu->cd.x86.ldtr = selector; |
| 830 |
cpu->cd.x86.ldtr_base = base; |
| 831 |
cpu->cd.x86.ldtr_limit = limit; |
| 832 |
break; |
| 833 |
} |
| 834 |
return; |
| 835 |
} |
| 836 |
|
| 837 |
if ((descr[5] & 0x18) == 0x18) { |
| 838 |
descr_type = DESCR_TYPE_CODE; |
| 839 |
readable = descr[5] & 0x02? 1 : 0; |
| 840 |
if ((descr[5] & 0x98) != 0x98) { |
| 841 |
fatal("TODO CODE\n"); |
| 842 |
goto fail_dump; |
| 843 |
} |
| 844 |
} else if ((descr[5] & 0x18) == 0x10) { |
| 845 |
descr_type = DESCR_TYPE_DATA; |
| 846 |
readable = 1; |
| 847 |
writable = descr[5] & 0x02? 1 : 0; |
| 848 |
if ((descr[5] & 0x98) != 0x90) { |
| 849 |
fatal("TODO DATA\n"); |
| 850 |
goto fail_dump; |
| 851 |
} |
| 852 |
} else if (segnr == X86_S_CS && (descr[5] & 0x15) == 0x01 |
| 853 |
&& curpcp != NULL) { |
| 854 |
/* TSS */ |
| 855 |
x86_task_switch(cpu, selector, curpcp); |
| 856 |
return; |
| 857 |
} else { |
| 858 |
fatal("TODO: other\n"); |
| 859 |
goto fail_dump; |
| 860 |
} |
| 861 |
|
| 862 |
cpu->cd.x86.descr_cache[segnr].valid = 1; |
| 863 |
cpu->cd.x86.descr_cache[segnr].default_op_size = |
| 864 |
(descr[6] & 0x40)? 32 : 16; |
| 865 |
cpu->cd.x86.descr_cache[segnr].access_rights = descr[5]; |
| 866 |
cpu->cd.x86.descr_cache[segnr].descr_type = descr_type; |
| 867 |
cpu->cd.x86.descr_cache[segnr].readable = readable; |
| 868 |
cpu->cd.x86.descr_cache[segnr].writable = writable; |
| 869 |
cpu->cd.x86.descr_cache[segnr].granularity = granularity; |
| 870 |
cpu->cd.x86.descr_cache[segnr].base = base; |
| 871 |
cpu->cd.x86.descr_cache[segnr].limit = limit; |
| 872 |
cpu->cd.x86.s[segnr] = orig_selector; |
| 873 |
return; |
| 874 |
|
| 875 |
fail_dump: |
| 876 |
for (i=0; i<8; i++) |
| 877 |
fatal(" %02x", descr[i]); |
| 878 |
cpu->running = 0; |
| 879 |
} |
| 880 |
|
| 881 |
|
| 882 |
/* |
| 883 |
* x86_load(): |
| 884 |
* |
| 885 |
* Returns same error code as memory_rw(). |
| 886 |
*/ |
| 887 |
static int x86_load(struct cpu *cpu, uint64_t addr, uint64_t *data, int len) |
| 888 |
{ |
| 889 |
unsigned char databuf[8]; |
| 890 |
int res; |
| 891 |
uint64_t d; |
| 892 |
|
| 893 |
res = cpu->memory_rw(cpu, cpu->mem, addr, &databuf[0], len, |
| 894 |
MEM_READ, CACHE_DATA); |
| 895 |
|
| 896 |
d = databuf[0]; |
| 897 |
if (len > 1) { |
| 898 |
d += ((uint64_t)databuf[1] << 8); |
| 899 |
if (len > 2) { |
| 900 |
d += ((uint64_t)databuf[2] << 16); |
| 901 |
d += ((uint64_t)databuf[3] << 24); |
| 902 |
if (len > 4) { |
| 903 |
d += ((uint64_t)databuf[4] << 32); |
| 904 |
d += ((uint64_t)databuf[5] << 40); |
| 905 |
d += ((uint64_t)databuf[6] << 48); |
| 906 |
d += ((uint64_t)databuf[7] << 56); |
| 907 |
} |
| 908 |
} |
| 909 |
} |
| 910 |
|
| 911 |
*data = d; |
| 912 |
return res; |
| 913 |
} |
| 914 |
|
| 915 |
|
| 916 |
/* |
| 917 |
* x86_store(): |
| 918 |
* |
| 919 |
* Returns same error code as memory_rw(). |
| 920 |
*/ |
| 921 |
static int x86_store(struct cpu *cpu, uint64_t addr, uint64_t data, int len) |
| 922 |
{ |
| 923 |
unsigned char databuf[8]; |
| 924 |
|
| 925 |
/* x86 is always little-endian: */ |
| 926 |
databuf[0] = data; |
| 927 |
if (len > 1) { |
| 928 |
databuf[1] = data >> 8; |
| 929 |
if (len > 2) { |
| 930 |
databuf[2] = data >> 16; |
| 931 |
databuf[3] = data >> 24; |
| 932 |
if (len > 4) { |
| 933 |
databuf[4] = data >> 32; |
| 934 |
databuf[5] = data >> 40; |
| 935 |
databuf[6] = data >> 48; |
| 936 |
databuf[7] = data >> 56; |
| 937 |
} |
| 938 |
} |
| 939 |
} |
| 940 |
|
| 941 |
return cpu->memory_rw(cpu, cpu->mem, addr, &databuf[0], len, |
| 942 |
MEM_WRITE, CACHE_DATA); |
| 943 |
} |
| 944 |
|
| 945 |
|
| 946 |
/* |
| 947 |
* x86_write_cr(): |
| 948 |
* |
| 949 |
* Write to a control register. |
| 950 |
*/ |
| 951 |
static void x86_write_cr(struct cpu *cpu, int r, uint64_t value) |
| 952 |
{ |
| 953 |
uint64_t new, tmp; |
| 954 |
|
| 955 |
switch (r) { |
| 956 |
case 0: new = cpu->cd.x86.cr[r] = value; |
| 957 |
/* Warn about unimplemented bits: */ |
| 958 |
tmp = new & ~(X86_CR0_PE | X86_CR0_PG); |
| 959 |
if (cpu->cd.x86.model.model_number <= X86_MODEL_80386) { |
| 960 |
if (tmp & X86_CR0_WP) |
| 961 |
fatal("WARNING: cr0 WP bit set, but this is" |
| 962 |
" not an 80486 or higher (?)\n"); |
| 963 |
} |
| 964 |
tmp &= ~X86_CR0_WP; |
| 965 |
if (tmp != 0) |
| 966 |
fatal("x86_write_cr(): unimplemented cr0 bits: " |
| 967 |
"0x%08llx\n", (long long)tmp); |
| 968 |
break; |
| 969 |
case 2: |
| 970 |
case 3: new = cpu->cd.x86.cr[r] = value; |
| 971 |
break; |
| 972 |
case 4: new = cpu->cd.x86.cr[r] = value; |
| 973 |
/* Warn about unimplemented bits: */ |
| 974 |
tmp = new; /* & ~(X86_CR0_PE | X86_CR0_PG); */ |
| 975 |
if (tmp != 0) |
| 976 |
fatal("x86_write_cr(): unimplemented cr4 bits: " |
| 977 |
"0x%08llx\n", (long long)tmp); |
| 978 |
break; |
| 979 |
default:fatal("x86_write_cr(): write to UNIMPLEMENTED cr%i\n", r); |
| 980 |
cpu->running = 0; |
| 981 |
} |
| 982 |
} |
| 983 |
|
| 984 |
|
| 985 |
static char *ofs_string(int32_t imm) |
| 986 |
{ |
| 987 |
static char buf[25]; |
| 988 |
buf[0] = buf[sizeof(buf)-1] = '\0'; |
| 989 |
|
| 990 |
if (imm > 32) |
| 991 |
sprintf(buf, "+0x%x", imm); |
| 992 |
else if (imm > 0) |
| 993 |
sprintf(buf, "+%i", imm); |
| 994 |
else if (imm < -32) |
| 995 |
sprintf(buf, "-0x%x", -imm); |
| 996 |
else if (imm < 0) |
| 997 |
sprintf(buf, "-%i", -imm); |
| 998 |
|
| 999 |
return buf; |
| 1000 |
} |
| 1001 |
|
| 1002 |
|
| 1003 |
static char modrm_r[65]; |
| 1004 |
static char modrm_rm[65]; |
| 1005 |
#define MODRM_READ 0 |
| 1006 |
#define MODRM_WRITE_RM 1 |
| 1007 |
#define MODRM_WRITE_R 2 |
| 1008 |
/* flags: */ |
| 1009 |
#define MODRM_EIGHTBIT 1 |
| 1010 |
#define MODRM_SEG 2 |
| 1011 |
#define MODRM_JUST_GET_ADDR 4 |
| 1012 |
#define MODRM_CR 8 |
| 1013 |
#define MODRM_DR 16 |
| 1014 |
#define MODRM_R_NONEIGHTBIT 32 |
| 1015 |
#define MODRM_RM_16BIT 64 |
| 1016 |
|
| 1017 |
|
| 1018 |
/* |
| 1019 |
* modrm(): |
| 1020 |
* |
| 1021 |
* Yuck. I have a feeling that this function will become really ugly. |
| 1022 |
*/ |
| 1023 |
static int modrm(struct cpu *cpu, int writeflag, int mode, int mode67, |
| 1024 |
int flags, unsigned char **instrp, uint64_t *lenp, |
| 1025 |
uint64_t *op1p, uint64_t *op2p) |
| 1026 |
{ |
| 1027 |
uint32_t imm, imm2; |
| 1028 |
uint64_t addr = 0; |
| 1029 |
int mod, r, rm, res = 1, z, q = mode/8, sib, s, i, b, immlen; |
| 1030 |
char *e, *f; |
| 1031 |
int disasm = (op1p == NULL); |
| 1032 |
|
| 1033 |
/* e for data, f for addresses */ |
| 1034 |
e = f = ""; |
| 1035 |
|
| 1036 |
if (disasm) { |
| 1037 |
if (mode == 32) |
| 1038 |
e = "e"; |
| 1039 |
if (mode == 64) |
| 1040 |
e = "r"; |
| 1041 |
if (mode67 == 32) |
| 1042 |
f = "e"; |
| 1043 |
if (mode67 == 64) |
| 1044 |
f = "r"; |
| 1045 |
modrm_rm[0] = modrm_rm[sizeof(modrm_rm)-1] = '\0'; |
| 1046 |
modrm_r[0] = modrm_r[sizeof(modrm_r)-1] = '\0'; |
| 1047 |
} |
| 1048 |
|
| 1049 |
immlen = mode67; |
| 1050 |
if (immlen == 64) |
| 1051 |
immlen = 32; |
| 1052 |
|
| 1053 |
imm = read_imm_common(instrp, lenp, 8, disasm); |
| 1054 |
mod = (imm >> 6) & 3; r = (imm >> 3) & 7; rm = imm & 7; |
| 1055 |
|
| 1056 |
if (flags & MODRM_EIGHTBIT) |
| 1057 |
q = 1; |
| 1058 |
|
| 1059 |
/* |
| 1060 |
* R/M: |
| 1061 |
*/ |
| 1062 |
|
| 1063 |
switch (mod) { |
| 1064 |
case 0: |
| 1065 |
if (disasm) { |
| 1066 |
if (mode67 >= 32) { |
| 1067 |
if (rm == 5) { |
| 1068 |
imm2 = read_imm_common(instrp, lenp, |
| 1069 |
immlen, disasm); |
| 1070 |
sprintf(modrm_rm, "[0x%x]", imm2); |
| 1071 |
} else if (rm == 4) { |
| 1072 |
char tmp[20]; |
| 1073 |
sib = read_imm_common(instrp, lenp, |
| 1074 |
8, disasm); |
| 1075 |
s = 1 << (sib >> 6); |
| 1076 |
i = (sib >> 3) & 7; |
| 1077 |
b = sib & 7; |
| 1078 |
if (b == 5) { /* imm base */ |
| 1079 |
imm2 = read_imm_common(instrp, |
| 1080 |
lenp, immlen, disasm); |
| 1081 |
sprintf(tmp, ofs_string(imm2)); |
| 1082 |
} else |
| 1083 |
sprintf(tmp, "+%s%s", f, |
| 1084 |
reg_names[b]); |
| 1085 |
if (i == 4) |
| 1086 |
sprintf(modrm_rm, "[%s]", tmp); |
| 1087 |
else if (s == 1) |
| 1088 |
sprintf(modrm_rm, "[%s%s%s]", |
| 1089 |
f, reg_names[i], tmp); |
| 1090 |
else |
| 1091 |
sprintf(modrm_rm, "[%s%s*%i%s" |
| 1092 |
"]", f, reg_names[i], |
| 1093 |
s, tmp); |
| 1094 |
} else { |
| 1095 |
sprintf(modrm_rm, "[%s%s]", f, |
| 1096 |
reg_names[rm]); |
| 1097 |
} |
| 1098 |
} else { |
| 1099 |
switch (rm) { |
| 1100 |
case 0: sprintf(modrm_rm, "[bx+si]"); |
| 1101 |
break; |
| 1102 |
case 1: sprintf(modrm_rm, "[bx+di]"); |
| 1103 |
break; |
| 1104 |
case 2: sprintf(modrm_rm, "[bp+si]"); |
| 1105 |
break; |
| 1106 |
case 3: sprintf(modrm_rm, "[bp+di]"); |
| 1107 |
break; |
| 1108 |
case 4: sprintf(modrm_rm, "[si]"); |
| 1109 |
break; |
| 1110 |
case 5: sprintf(modrm_rm, "[di]"); |
| 1111 |
break; |
| 1112 |
case 6: imm2 = read_imm_common(instrp, lenp, |
| 1113 |
immlen, disasm); |
| 1114 |
sprintf(modrm_rm, "[0x%x]", imm2); |
| 1115 |
break; |
| 1116 |
case 7: sprintf(modrm_rm, "[bx]"); |
| 1117 |
break; |
| 1118 |
} |
| 1119 |
} |
| 1120 |
} else { |
| 1121 |
if (mode67 >= 32) { |
| 1122 |
if (rm == 5) { |
| 1123 |
addr = read_imm_common(instrp, lenp, |
| 1124 |
immlen, disasm); |
| 1125 |
} else if (rm == 4) { |
| 1126 |
sib = read_imm_common(instrp, lenp, |
| 1127 |
8, disasm); |
| 1128 |
s = 1 << (sib >> 6); |
| 1129 |
i = (sib >> 3) & 7; |
| 1130 |
b = sib & 7; |
| 1131 |
if (b == 4 && |
| 1132 |
!cpu->cd.x86.seg_override) |
| 1133 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1134 |
if (b == 5) |
| 1135 |
addr = read_imm_common(instrp, |
| 1136 |
lenp, mode67, disasm); |
| 1137 |
else |
| 1138 |
addr = cpu->cd.x86.r[b]; |
| 1139 |
if (i != 4) |
| 1140 |
addr += cpu->cd.x86.r[i] * s; |
| 1141 |
} else { |
| 1142 |
addr = cpu->cd.x86.r[rm]; |
| 1143 |
} |
| 1144 |
} else { |
| 1145 |
switch (rm) { |
| 1146 |
case 0: addr = cpu->cd.x86.r[X86_R_BX] + |
| 1147 |
cpu->cd.x86.r[X86_R_SI]; break; |
| 1148 |
case 1: addr = cpu->cd.x86.r[X86_R_BX] + |
| 1149 |
cpu->cd.x86.r[X86_R_DI]; break; |
| 1150 |
case 2: addr = cpu->cd.x86.r[X86_R_BP] + |
| 1151 |
cpu->cd.x86.r[X86_R_SI]; |
| 1152 |
if (!cpu->cd.x86.seg_override) |
| 1153 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1154 |
break; |
| 1155 |
case 3: addr = cpu->cd.x86.r[X86_R_BP] + |
| 1156 |
cpu->cd.x86.r[X86_R_DI]; |
| 1157 |
if (!cpu->cd.x86.seg_override) |
| 1158 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1159 |
break; |
| 1160 |
case 4: addr = cpu->cd.x86.r[X86_R_SI]; break; |
| 1161 |
case 5: addr = cpu->cd.x86.r[X86_R_DI]; break; |
| 1162 |
case 6: addr = read_imm_common(instrp, lenp, |
| 1163 |
immlen, disasm); break; |
| 1164 |
case 7: addr = cpu->cd.x86.r[X86_R_BX]; break; |
| 1165 |
} |
| 1166 |
} |
| 1167 |
|
| 1168 |
if (mode67 == 16) |
| 1169 |
addr &= 0xffff; |
| 1170 |
if (mode67 == 32) |
| 1171 |
addr &= 0xffffffffULL; |
| 1172 |
|
| 1173 |
switch (writeflag) { |
| 1174 |
case MODRM_WRITE_RM: |
| 1175 |
res = x86_store(cpu, addr, *op1p, q); |
| 1176 |
break; |
| 1177 |
case MODRM_READ: /* read */ |
| 1178 |
if (flags & MODRM_JUST_GET_ADDR) |
| 1179 |
*op1p = addr; |
| 1180 |
else |
| 1181 |
res = x86_load(cpu, addr, op1p, q); |
| 1182 |
} |
| 1183 |
} |
| 1184 |
break; |
| 1185 |
case 1: |
| 1186 |
case 2: |
| 1187 |
z = (mod == 1)? 8 : immlen; |
| 1188 |
if (disasm) { |
| 1189 |
if (mode67 >= 32) { |
| 1190 |
if (rm == 4) { |
| 1191 |
sib = read_imm_common(instrp, lenp, |
| 1192 |
8, disasm); |
| 1193 |
s = 1 << (sib >> 6); |
| 1194 |
i = (sib >> 3) & 7; |
| 1195 |
b = sib & 7; |
| 1196 |
imm2 = read_imm_common(instrp, lenp, |
| 1197 |
z, disasm); |
| 1198 |
if (z == 8) imm2 = (signed char)imm2; |
| 1199 |
if (i == 4) |
| 1200 |
sprintf(modrm_rm, "[%s%s%s]", |
| 1201 |
f, reg_names[b], |
| 1202 |
ofs_string(imm2)); |
| 1203 |
else if (s == 1) |
| 1204 |
sprintf(modrm_rm, "[%s%s%s" |
| 1205 |
"%s%s]", f, reg_names[i], |
| 1206 |
f, reg_names[b], |
| 1207 |
ofs_string(imm2)); |
| 1208 |
else |
| 1209 |
sprintf(modrm_rm, "[%s%s*%i+%s" |
| 1210 |
"%s%s]", f, reg_names[i], s, |
| 1211 |
f, reg_names[b], |
| 1212 |
ofs_string(imm2)); |
| 1213 |
} else { |
| 1214 |
imm2 = read_imm_common(instrp, lenp, |
| 1215 |
z, disasm); |
| 1216 |
if (z == 8) imm2 = (signed char)imm2; |
| 1217 |
sprintf(modrm_rm, "[%s%s%s]", f, |
| 1218 |
reg_names[rm], ofs_string(imm2)); |
| 1219 |
} |
| 1220 |
} else |
| 1221 |
switch (rm) { |
| 1222 |
case 0: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1223 |
if (z == 8) imm2 = (signed char)imm2; |
| 1224 |
sprintf(modrm_rm, "[bx+si%s]",ofs_string(imm2)); |
| 1225 |
break; |
| 1226 |
case 1: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1227 |
if (z == 8) imm2 = (signed char)imm2; |
| 1228 |
sprintf(modrm_rm, "[bx+di%s]",ofs_string(imm2)); |
| 1229 |
break; |
| 1230 |
case 2: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1231 |
if (z == 8) imm2 = (signed char)imm2; |
| 1232 |
sprintf(modrm_rm, "[bp+si%s]",ofs_string(imm2)); |
| 1233 |
break; |
| 1234 |
case 3: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1235 |
if (z == 8) imm2 = (signed char)imm2; |
| 1236 |
sprintf(modrm_rm, "[bp+di%s]",ofs_string(imm2)); |
| 1237 |
break; |
| 1238 |
case 4: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1239 |
if (z == 8) imm2 = (signed char)imm2; |
| 1240 |
sprintf(modrm_rm, "[si%s]", ofs_string(imm2)); |
| 1241 |
break; |
| 1242 |
case 5: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1243 |
if (z == 8) imm2 = (signed char)imm2; |
| 1244 |
sprintf(modrm_rm, "[di%s]", ofs_string(imm2)); |
| 1245 |
break; |
| 1246 |
case 6: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1247 |
if (z == 8) imm2 = (signed char)imm2; |
| 1248 |
sprintf(modrm_rm, "[bp%s]", ofs_string(imm2)); |
| 1249 |
break; |
| 1250 |
case 7: imm2 = read_imm_common(instrp, lenp, z, disasm); |
| 1251 |
if (z == 8) imm2 = (signed char)imm2; |
| 1252 |
sprintf(modrm_rm, "[bx%s]", ofs_string(imm2)); |
| 1253 |
break; |
| 1254 |
} |
| 1255 |
} else { |
| 1256 |
if (mode67 >= 32) { |
| 1257 |
if (rm == 4) { |
| 1258 |
sib = read_imm_common(instrp, lenp, |
| 1259 |
8, disasm); |
| 1260 |
s = 1 << (sib >> 6); |
| 1261 |
i = (sib >> 3) & 7; |
| 1262 |
b = sib & 7; |
| 1263 |
addr = read_imm_common(instrp, lenp, |
| 1264 |
z, disasm); |
| 1265 |
if ((b == 4 || b == 5) && |
| 1266 |
!cpu->cd.x86.seg_override) |
| 1267 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1268 |
if (z == 8) |
| 1269 |
addr = (signed char)addr; |
| 1270 |
if (i == 4) |
| 1271 |
addr = cpu->cd.x86.r[b] + addr; |
| 1272 |
else |
| 1273 |
addr = cpu->cd.x86.r[i] * s + |
| 1274 |
cpu->cd.x86.r[b] + addr; |
| 1275 |
} else { |
| 1276 |
addr = read_imm_common(instrp, lenp, |
| 1277 |
z, disasm); |
| 1278 |
if (z == 8) |
| 1279 |
addr = (signed char)addr; |
| 1280 |
addr = cpu->cd.x86.r[rm] + addr; |
| 1281 |
} |
| 1282 |
} else { |
| 1283 |
addr = read_imm_common(instrp, lenp, z, disasm); |
| 1284 |
if (z == 8) |
| 1285 |
addr = (signed char)addr; |
| 1286 |
switch (rm) { |
| 1287 |
case 0: addr += cpu->cd.x86.r[X86_R_BX] |
| 1288 |
+ cpu->cd.x86.r[X86_R_SI]; |
| 1289 |
break; |
| 1290 |
case 1: addr += cpu->cd.x86.r[X86_R_BX] |
| 1291 |
+ cpu->cd.x86.r[X86_R_DI]; |
| 1292 |
break; |
| 1293 |
case 2: addr += cpu->cd.x86.r[X86_R_BP] |
| 1294 |
+ cpu->cd.x86.r[X86_R_SI]; |
| 1295 |
if (!cpu->cd.x86.seg_override) |
| 1296 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1297 |
break; |
| 1298 |
case 3: addr += cpu->cd.x86.r[X86_R_BP] |
| 1299 |
+ cpu->cd.x86.r[X86_R_DI]; |
| 1300 |
if (!cpu->cd.x86.seg_override) |
| 1301 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1302 |
break; |
| 1303 |
case 4: addr += cpu->cd.x86.r[X86_R_SI]; |
| 1304 |
break; |
| 1305 |
case 5: addr += cpu->cd.x86.r[X86_R_DI]; |
| 1306 |
break; |
| 1307 |
case 6: addr += cpu->cd.x86.r[X86_R_BP]; |
| 1308 |
if (!cpu->cd.x86.seg_override) |
| 1309 |
cpu->cd.x86.cursegment=X86_S_SS; |
| 1310 |
break; |
| 1311 |
case 7: addr += cpu->cd.x86.r[X86_R_BX]; |
| 1312 |
break; |
| 1313 |
} |
| 1314 |
} |
| 1315 |
|
| 1316 |
if (mode67 == 16) |
| 1317 |
addr &= 0xffff; |
| 1318 |
if (mode67 == 32) |
| 1319 |
addr &= 0xffffffffULL; |
| 1320 |
|
| 1321 |
switch (writeflag) { |
| 1322 |
case MODRM_WRITE_RM: |
| 1323 |
res = x86_store(cpu, addr, *op1p, q); |
| 1324 |
break; |
| 1325 |
case MODRM_READ: /* read */ |
| 1326 |
if (flags & MODRM_JUST_GET_ADDR) |
| 1327 |
*op1p = addr; |
| 1328 |
else |
| 1329 |
res = x86_load(cpu, addr, op1p, q); |
| 1330 |
} |
| 1331 |
} |
| 1332 |
break; |
| 1333 |
case 3: |
| 1334 |
if (flags & MODRM_EIGHTBIT) { |
| 1335 |
if (disasm) { |
| 1336 |
strlcpy(modrm_rm, reg_names_bytes[rm], |
| 1337 |
sizeof(modrm_rm)); |
| 1338 |
} else { |
| 1339 |
switch (writeflag) { |
| 1340 |
case MODRM_WRITE_RM: |
| 1341 |
if (rm < 4) |
| 1342 |
cpu->cd.x86.r[rm] = |
| 1343 |
(cpu->cd.x86.r[rm] & |
| 1344 |
~0xff) | (*op1p & 0xff); |
| 1345 |
else |
| 1346 |
cpu->cd.x86.r[rm&3] = (cpu-> |
| 1347 |
cd.x86.r[rm&3] & ~0xff00) | |
| 1348 |
((*op1p & 0xff) << 8); |
| 1349 |
break; |
| 1350 |
case MODRM_READ: |
| 1351 |
if (rm < 4) |
| 1352 |
*op1p = cpu->cd.x86.r[rm] & |
| 1353 |
0xff; |
| 1354 |
else |
| 1355 |
*op1p = (cpu->cd.x86.r[rm&3] & |
| 1356 |
0xff00) >> 8; |
| 1357 |
} |
| 1358 |
} |
| 1359 |
} else { |
| 1360 |
if (disasm) { |
| 1361 |
if (mode == 16 || flags & MODRM_RM_16BIT) |
| 1362 |
strlcpy(modrm_rm, reg_names[rm], |
| 1363 |
sizeof(modrm_rm)); |
| 1364 |
else |
| 1365 |
sprintf(modrm_rm, "%s%s", e, |
| 1366 |
reg_names[rm]); |
| 1367 |
} else { |
| 1368 |
switch (writeflag) { |
| 1369 |
case MODRM_WRITE_RM: |
| 1370 |
if (mode == 16 || |
| 1371 |
flags & MODRM_RM_16BIT) |
| 1372 |
cpu->cd.x86.r[rm] = ( |
| 1373 |
cpu->cd.x86.r[rm] & ~0xffff) |
| 1374 |
| (*op1p & 0xffff); |
| 1375 |
else |
| 1376 |
cpu->cd.x86.r[rm] = |
| 1377 |
modify(cpu->cd.x86.r[rm], |
| 1378 |
*op1p); |
| 1379 |
break; |
| 1380 |
case MODRM_READ: /* read */ |
| 1381 |
if (mode == 16 || |
| 1382 |
flags & MODRM_RM_16BIT) |
| 1383 |
*op1p = cpu->cd.x86.r[rm] |
| 1384 |
& 0xffff; |
| 1385 |
else |
| 1386 |
*op1p = cpu->cd.x86.r[rm]; |
| 1387 |
} |
| 1388 |
} |
| 1389 |
} |
| 1390 |
break; |
| 1391 |
default: |
| 1392 |
fatal("modrm(): unimplemented mod %i\n", mod); |
| 1393 |
exit(1); |
| 1394 |
} |
| 1395 |
|
| 1396 |
|
| 1397 |
/* |
| 1398 |
* R: |
| 1399 |
*/ |
| 1400 |
|
| 1401 |
if (flags & MODRM_EIGHTBIT && !(flags & MODRM_R_NONEIGHTBIT)) { |
| 1402 |
if (disasm) { |
| 1403 |
strlcpy(modrm_r, reg_names_bytes[r], |
| 1404 |
sizeof(modrm_r)); |
| 1405 |
} else { |
| 1406 |
switch (writeflag) { |
| 1407 |
case MODRM_WRITE_R: |
| 1408 |
if (r < 4) |
| 1409 |
cpu->cd.x86.r[r] = (cpu->cd.x86.r[r] & |
| 1410 |
~0xff) | (*op2p & 0xff); |
| 1411 |
else |
| 1412 |
cpu->cd.x86.r[r&3] = (cpu->cd.x86.r[r&3] |
| 1413 |
& ~0xff00) | ((*op2p & 0xff) << 8); |
| 1414 |
break; |
| 1415 |
case MODRM_READ: |
| 1416 |
if (r < 4) |
| 1417 |
*op2p = cpu->cd.x86.r[r] & 0xff; |
| 1418 |
else |
| 1419 |
*op2p = (cpu->cd.x86.r[r&3] & |
| 1420 |
0xff00) >>8; |
| 1421 |
} |
| 1422 |
} |
| 1423 |
} else { |
| 1424 |
if (disasm) { |
| 1425 |
if (flags & MODRM_SEG) |
| 1426 |
strlcpy(modrm_r, seg_names[r], |
| 1427 |
sizeof(modrm_r)); |
| 1428 |
else if (flags & MODRM_CR) |
| 1429 |
sprintf(modrm_r, "cr%i", r); |
| 1430 |
else if (flags & MODRM_DR) |
| 1431 |
sprintf(modrm_r, "dr%i", r); |
| 1432 |
else { |
| 1433 |
if (mode >= 32) |
| 1434 |
sprintf(modrm_r, "%s%s", e, |
| 1435 |
reg_names[r]); |
| 1436 |
else |
| 1437 |
strlcpy(modrm_r, reg_names[r], |
| 1438 |
sizeof(modrm_r)); |
| 1439 |
} |
| 1440 |
} else { |
| 1441 |
switch (writeflag) { |
| 1442 |
case MODRM_WRITE_R: |
| 1443 |
if (flags & MODRM_SEG) |
| 1444 |
cpu->cd.x86.s[r] = *op2p; |
| 1445 |
else if (flags & MODRM_CR) |
| 1446 |
x86_write_cr(cpu, r, *op2p); |
| 1447 |
else if (flags & MODRM_DR) |
| 1448 |
cpu->cd.x86.dr[r] = *op2p; |
| 1449 |
else |
| 1450 |
cpu->cd.x86.r[r] = |
| 1451 |
modify(cpu->cd.x86.r[r], *op2p); |
| 1452 |
break; |
| 1453 |
case MODRM_READ: |
| 1454 |
if (flags & MODRM_SEG) |
| 1455 |
*op2p = cpu->cd.x86.s[r]; |
| 1456 |
else if (flags & MODRM_CR) |
| 1457 |
*op2p = cpu->cd.x86.cr[r]; |
| 1458 |
else if (flags & MODRM_DR) |
| 1459 |
*op2p = cpu->cd.x86.dr[r]; |
| 1460 |
else |
| 1461 |
*op2p = cpu->cd.x86.r[r]; |
| 1462 |
} |
| 1463 |
} |
| 1464 |
} |
| 1465 |
|
| 1466 |
if (!disasm) { |
| 1467 |
switch (mode) { |
| 1468 |
case 16:*op1p &= 0xffff; *op2p &= 0xffff; break; |
| 1469 |
case 32:*op1p &= 0xffffffffULL; *op2p &= 0xffffffffULL; break; |
| 1470 |
} |
| 1471 |
} |
| 1472 |
|
| 1473 |
return res; |
| 1474 |
} |
| 1475 |
|
| 1476 |
|
| 1477 |
/* |
| 1478 |
* x86_cpu_disassemble_instr(): |
| 1479 |
* |
| 1480 |
* Convert an instruction word into human readable format, for instruction |
| 1481 |
* tracing. |
| 1482 |
* |
| 1483 |
* If running&1 is 1, cpu->pc should be the address of the instruction. |
| 1484 |
* |
| 1485 |
* If running&1 is 0, things that depend on the runtime environment (eg. |
| 1486 |
* register contents) will not be shown, and addr will be used instead of |
| 1487 |
* cpu->pc for relative addresses. |
| 1488 |
* |
| 1489 |
* The rest of running tells us the default (code) operand size. |
| 1490 |
*/ |
| 1491 |
int x86_cpu_disassemble_instr(struct cpu *cpu, unsigned char *instr, |
| 1492 |
int running, uint64_t dumpaddr, int bintrans) |
| 1493 |
{ |
| 1494 |
int op, rep = 0, lock = 0, n_prefix_bytes = 0; |
| 1495 |
uint64_t ilen = 0, offset; |
| 1496 |
uint32_t imm=0, imm2; |
| 1497 |
int mode = running & ~1; |
| 1498 |
int mode67; |
| 1499 |
char *symbol, *mnem = "ERROR", *e = "e", *prefix = NULL; |
| 1500 |
|
| 1501 |
if (running) |
| 1502 |
dumpaddr = cpu->pc; |
| 1503 |
|
| 1504 |
if (mode == 0) { |
| 1505 |
mode = cpu->cd.x86.descr_cache[X86_S_CS].default_op_size; |
| 1506 |
if (mode == 0) { |
| 1507 |
fatal("x86_cpu_disassemble_instr(): no mode: TODO\n"); |
| 1508 |
return 1; |
| 1509 |
} |
| 1510 |
} |
| 1511 |
|
| 1512 |
mode67 = mode; |
| 1513 |
|
| 1514 |
symbol = get_symbol_name(&cpu->machine->symbol_context, |
| 1515 |
dumpaddr, &offset); |
| 1516 |
if (symbol != NULL && offset==0) |
| 1517 |
debug("<%s>\n", symbol); |
| 1518 |
|
| 1519 |
if (cpu->machine->ncpus > 1 && running) |
| 1520 |
debug("cpu%i: ", cpu->cpu_id); |
| 1521 |
|
| 1522 |
if (mode == 32) |
| 1523 |
debug("%08x: ", (int)dumpaddr); |
| 1524 |
else if (mode == 64) |
| 1525 |
debug("%016llx: ", (long long)dumpaddr); |
| 1526 |
else { /* 16-bit mode */ |
| 1527 |
debug("%04x:%04x ", cpu->cd.x86.s[X86_S_CS], |
| 1528 |
(int)dumpaddr & 0xffff); |
| 1529 |
} |
| 1530 |
|
| 1531 |
/* |
| 1532 |
* Decode the instruction: |
| 1533 |
*/ |
| 1534 |
|
| 1535 |
/* All instructions are at least 1 byte long: */ |
| 1536 |
HEXPRINT(instr,1); |
| 1537 |
ilen = 1; |
| 1538 |
|
| 1539 |
/* Any prefix? */ |
| 1540 |
for (;;) { |
| 1541 |
if (instr[0] == 0x66) { |
| 1542 |
if (mode == 16) |
| 1543 |
mode = 32; |
| 1544 |
else |
| 1545 |
mode = 16; |
| 1546 |
} else if (instr[0] == 0x67) { |
| 1547 |
if (mode67 == 16) |
| 1548 |
mode67 = 32; |
| 1549 |
else |
| 1550 |
mode67 = 16; |
| 1551 |
} else if (instr[0] == 0xf2) { |
| 1552 |
rep = REP_REPNE; |
| 1553 |
} else if (instr[0] == 0xf3) { |
| 1554 |
rep = REP_REP; |
| 1555 |
} else if (instr[0] == 0x26) { |
| 1556 |
prefix = "es:"; |
| 1557 |
} else if (instr[0] == 0x2e) { |
| 1558 |
prefix = "cs:"; |
| 1559 |
} else if (instr[0] == 0x36) { |
| 1560 |
prefix = "ss:"; |
| 1561 |
} else if (instr[0] == 0x3e) { |
| 1562 |
prefix = "ds:"; |
| 1563 |
} else if (instr[0] == 0x64) { |
| 1564 |
prefix = "fs:"; |
| 1565 |
} else if (instr[0] == 0x65) { |
| 1566 |
prefix = "gs:"; |
| 1567 |
} else if (instr[0] == 0xf0) { |
| 1568 |
lock = 1; |
| 1569 |
} else |
| 1570 |
break; |
| 1571 |
|
| 1572 |
if (++n_prefix_bytes > 4) { |
| 1573 |
SPACES; debug("more than 4 prefix bytes?\n"); |
| 1574 |
return 4; |
| 1575 |
} |
| 1576 |
|
| 1577 |
/* TODO: lock, segment overrides etc */ |
| 1578 |
instr ++; ilen ++; |
| 1579 |
debug("%02x", instr[0]); |
| 1580 |
} |
| 1581 |
|
| 1582 |
if (mode == 16) |
| 1583 |
e = ""; |
| 1584 |
|
| 1585 |
op = instr[0]; |
| 1586 |
instr ++; |
| 1587 |
|
| 1588 |
if ((op & 0xf0) <= 0x30 && (op & 7) <= 5) { |
| 1589 |
switch (op & 0x38) { |
| 1590 |
case 0x00: mnem = "add"; break; |
| 1591 |
case 0x08: mnem = "or"; break; |
| 1592 |
case 0x10: mnem = "adc"; break; |
| 1593 |
case 0x18: mnem = "sbb"; break; |
| 1594 |
case 0x20: mnem = "and"; break; |
| 1595 |
case 0x28: mnem = "sub"; break; |
| 1596 |
case 0x30: mnem = "xor"; break; |
| 1597 |
case 0x38: mnem = "cmp"; break; |
| 1598 |
} |
| 1599 |
switch (op & 7) { |
| 1600 |
case 4: imm = read_imm_and_print(&instr, &ilen, 8); |
| 1601 |
SPACES; debug("%s\tal,0x%02x", mnem, imm); |
| 1602 |
break; |
| 1603 |
case 5: imm = read_imm_and_print(&instr, &ilen, mode); |
| 1604 |
SPACES; debug("%s\t%sax,0x%x", mnem, e, imm); |
| 1605 |
break; |
| 1606 |
default:modrm(cpu, MODRM_READ, mode, mode67, op&1? 0 : |
| 1607 |
MODRM_EIGHTBIT, &instr, &ilen, NULL, NULL); |
| 1608 |
SPACES; debug("%s\t", mnem); |
| 1609 |
if (op & 2) |
| 1610 |
debug("%s,%s", modrm_r, modrm_rm); |
| 1611 |
else |
| 1612 |
debug("%s,%s", modrm_rm, modrm_r); |
| 1613 |
} |
| 1614 |
} else if (op == 0xf) { |
| 1615 |
/* "pop cs" on 8086 */ |
| 1616 |
if (cpu->cd.x86.model.model_number == X86_MODEL_8086) { |
| 1617 |
SPACES; debug("pop\tcs"); |
| 1618 |
} else { |
| 1619 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 1620 |
if (imm == 0x00) { |
| 1621 |
int subop = (*instr >> 3) & 0x7; |
| 1622 |
switch (subop) { |
| 1623 |
case 0: modrm(cpu, MODRM_READ, mode, mode67, |
| 1624 |
0, &instr, &ilen, NULL, NULL); |
| 1625 |
SPACES; debug("sldt\t%s", modrm_rm); |
| 1626 |
break; |
| 1627 |
case 1: modrm(cpu, MODRM_READ, 16 /* note:16 */, |
| 1628 |
mode67, 0, &instr, &ilen, |
| 1629 |
NULL, NULL); |
| 1630 |
SPACES; debug("str\t%s", modrm_rm); |
| 1631 |
break; |
| 1632 |
case 2: modrm(cpu, MODRM_READ, 16 /* note:16 */, |
| 1633 |
mode67, 0, &instr, &ilen, |
| 1634 |
NULL, NULL); |
| 1635 |
SPACES; debug("lldt\t%s", modrm_rm); |
| 1636 |
break; |
| 1637 |
case 3: modrm(cpu, MODRM_READ, 16 /* note:16 */, |
| 1638 |
mode67, 0, &instr, &ilen, |
| 1639 |
NULL, NULL); |
| 1640 |
SPACES; debug("ltr\t%s", modrm_rm); |
| 1641 |
break; |
| 1642 |
case 4: modrm(cpu, MODRM_READ, 16 /* note:16 */, |
| 1643 |
mode67, 0, &instr, &ilen, |
| 1644 |
NULL, NULL); |
| 1645 |
SPACES; debug("verr\t%s", modrm_rm); |
| 1646 |
break; |
| 1647 |
case 5: modrm(cpu, MODRM_READ, 16 /* note:16 */, |
| 1648 |
mode67, 0, &instr, &ilen, |
| 1649 |
NULL, NULL); |
| 1650 |
SPACES; debug("verw\t%s", modrm_rm); |
| 1651 |
break; |
| 1652 |
default:SPACES; debug("UNIMPLEMENTED 0x%02x,0x" |
| 1653 |
"%02x,0x%02x", op, imm, *instr); |
| 1654 |
} |
| 1655 |
} else if (imm == 0x01) { |
| 1656 |
int subop = (*instr >> 3) & 0x7; |
| 1657 |
switch (subop) { |
| 1658 |
case 0: |
| 1659 |
case 1: |
| 1660 |
case 2: |
| 1661 |
case 3: modrm(cpu, MODRM_READ, mode, mode67, |
| 1662 |
0, &instr, &ilen, NULL, NULL); |
| 1663 |
SPACES; debug("%s%s\t%s", |
| 1664 |
subop < 2? "s" : "l", |
| 1665 |
subop&1? "idt" : "gdt", modrm_rm); |
| 1666 |
break; |
| 1667 |
case 4: |
| 1668 |
case 6: if (((*instr >> 3) & 0x7) == 4) |
| 1669 |
mnem = "smsw"; |
| 1670 |
else |
| 1671 |
mnem = "lmsw"; |
| 1672 |
modrm(cpu, MODRM_READ, 16, mode67, |
| 1673 |
0, &instr, &ilen, NULL, NULL); |
| 1674 |
SPACES; debug("%s\t%s", mnem, modrm_rm); |
| 1675 |
break; |
| 1676 |
case 7: modrm(cpu, MODRM_READ, mode, |
| 1677 |
mode67, 0, &instr, &ilen, |
| 1678 |
NULL, NULL); |
| 1679 |
SPACES; debug("invlpg\t%s", modrm_rm); |
| 1680 |
break; |
| 1681 |
default:SPACES; debug("UNIMPLEMENTED 0x%02x,0x" |
| 1682 |
"%02x,0x%02x", op, imm, *instr); |
| 1683 |
} |
| 1684 |
} else if (imm == 0x02) { |
| 1685 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1686 |
0, &instr, &ilen, NULL, NULL); |
| 1687 |
SPACES; debug("lar\t%s,%s", modrm_r, modrm_rm); |
| 1688 |
} else if (imm == 0x03) { |
| 1689 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1690 |
0, &instr, &ilen, NULL, NULL); |
| 1691 |
SPACES; debug("lsl\t%s,%s", modrm_r, modrm_rm); |
| 1692 |
} else if (imm == 0x05) { |
| 1693 |
SPACES; /* TODO: exactly which models?*/ |
| 1694 |
if (cpu->cd.x86.model.model_number > |
| 1695 |
X86_MODEL_80486) |
| 1696 |
debug("syscall"); |
| 1697 |
else |
| 1698 |
debug("loadall286"); |
| 1699 |
} else if (imm == 0x06) { |
| 1700 |
SPACES; debug("clts"); |
| 1701 |
} else if (imm == 0x07) { |
| 1702 |
SPACES; /* TODO: exactly which models?*/ |
| 1703 |
if (cpu->cd.x86.model.model_number > |
| 1704 |
X86_MODEL_80486) |
| 1705 |
debug("sysret"); |
| 1706 |
else |
| 1707 |
debug("loadall"); |
| 1708 |
} else if (imm == 0x08) { |
| 1709 |
SPACES; debug("invd"); |
| 1710 |
} else if (imm == 0x09) { |
| 1711 |
SPACES; debug("wbinvd"); |
| 1712 |
} else if (imm == 0x0b) { |
| 1713 |
SPACES; debug("reserved_0b"); |
| 1714 |
} else if (imm == 0x20 || imm == 0x21) { |
| 1715 |
modrm(cpu, MODRM_READ, 32 /* note: 32 */, |
| 1716 |
mode67, imm == 0x20? MODRM_CR : MODRM_DR, |
| 1717 |
&instr, &ilen, NULL, NULL); |
| 1718 |
SPACES; debug("mov\t%s,%s", modrm_rm, modrm_r); |
| 1719 |
} else if (imm == 0x22 || imm == 0x23) { |
| 1720 |
modrm(cpu, MODRM_READ, 32 /* note: 32 */, |
| 1721 |
mode67, imm == 0x22? MODRM_CR : MODRM_DR, |
| 1722 |
&instr, &ilen, NULL, NULL); |
| 1723 |
SPACES; debug("mov\t%s,%s", modrm_r, modrm_rm); |
| 1724 |
} else if (imm == 0x30) { |
| 1725 |
SPACES; debug("wrmsr"); |
| 1726 |
} else if (imm == 0x31) { |
| 1727 |
SPACES; debug("rdtsc"); |
| 1728 |
} else if (imm == 0x32) { |
| 1729 |
SPACES; debug("rdmsr"); |
| 1730 |
} else if (imm == 0x33) { |
| 1731 |
SPACES; debug("rdpmc"); /* http://www |
| 1732 |
.x86.org/secrets/opcodes/rdpmc.htm */ |
| 1733 |
} else if (imm == 0x34) { |
| 1734 |
SPACES; debug("sysenter"); |
| 1735 |
} else if (imm == 0x36) { |
| 1736 |
SPACES; debug("sysexit"); |
| 1737 |
} else if (imm >= 0x40 && imm <= 0x4f) { |
| 1738 |
modrm(cpu, MODRM_READ, mode, mode67, 0, |
| 1739 |
&instr, &ilen, NULL, NULL); |
| 1740 |
op = imm & 0xf; |
| 1741 |
SPACES; debug("cmov%s%s\t%s,%s", op&1? "n" |
| 1742 |
: "", cond_names[(op/2) & 0x7], |
| 1743 |
modrm_r, modrm_rm); |
| 1744 |
} else if (imm >= 0x80 && imm <= 0x8f) { |
| 1745 |
op = imm & 0xf; |
| 1746 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 1747 |
imm = dumpaddr + 2 + mode/8 + imm; |
| 1748 |
SPACES; debug("j%s%s\tnear 0x%x", op&1? "n" |
| 1749 |
: "", cond_names[(op/2) & 0x7], imm); |
| 1750 |
} else if (imm >= 0x90 && imm <= 0x9f) { |
| 1751 |
op = imm; |
| 1752 |
modrm(cpu, MODRM_READ, mode, |
| 1753 |
mode67, MODRM_EIGHTBIT, &instr, &ilen, |
| 1754 |
NULL, NULL); |
| 1755 |
SPACES; debug("set%s%s\t%s", op&1? "n" |
| 1756 |
: "", cond_names[(op/2) & 0x7], modrm_rm); |
| 1757 |
} else if (imm == 0xa0) { |
| 1758 |
SPACES; debug("push\tfs"); |
| 1759 |
} else if (imm == 0xa1) { |
| 1760 |
SPACES; debug("pop\tfs"); |
| 1761 |
} else if (imm == 0xa2) { |
| 1762 |
SPACES; debug("cpuid"); |
| 1763 |
} else if (imm == 0xa3 || imm == 0xab |
| 1764 |
|| imm == 0xb3 || imm == 0xbb) { |
| 1765 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1766 |
0, &instr, &ilen, NULL, NULL); |
| 1767 |
switch (imm) { |
| 1768 |
case 0xa3: mnem = "bt"; break; |
| 1769 |
case 0xab: mnem = "bts"; break; |
| 1770 |
case 0xb3: mnem = "btr"; break; |
| 1771 |
case 0xbb: mnem = "btc"; break; |
| 1772 |
} |
| 1773 |
SPACES; debug("%s\t%s,%s", |
| 1774 |
mnem, modrm_rm, modrm_r); |
| 1775 |
} else if (imm == 0xa4 || imm == 0xa5 || |
| 1776 |
imm == 0xac || imm == 0xad) { |
| 1777 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1778 |
0, &instr, &ilen, NULL, NULL); |
| 1779 |
if (!(imm & 1)) |
| 1780 |
imm2 = read_imm_and_print(&instr, |
| 1781 |
&ilen, 8); |
| 1782 |
else |
| 1783 |
imm2 = 0; |
| 1784 |
SPACES; debug("sh%sd\t%s,%s,", |
| 1785 |
imm <= 0xa5? "l" : "r", |
| 1786 |
modrm_rm, modrm_r); |
| 1787 |
if (imm & 1) |
| 1788 |
debug("cl"); |
| 1789 |
else |
| 1790 |
debug("%i", imm2); |
| 1791 |
} else if (imm == 0xa8) { |
| 1792 |
SPACES; debug("push\tgs"); |
| 1793 |
} else if (imm == 0xa9) { |
| 1794 |
SPACES; debug("pop\tgs"); |
| 1795 |
} else if (imm == 0xaa) { |
| 1796 |
SPACES; debug("rsm"); |
| 1797 |
} else if (imm == 0xaf) { |
| 1798 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1799 |
0, &instr, &ilen, NULL, NULL); |
| 1800 |
SPACES; debug("imul\t%s,%s", modrm_r, modrm_rm); |
| 1801 |
} else if (imm == 0xb0 || imm == 0xb1) { |
| 1802 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1803 |
imm == 0xb0? MODRM_EIGHTBIT : 0, |
| 1804 |
&instr, &ilen, NULL, NULL); |
| 1805 |
SPACES; debug("cmpxchg\t%s,%s", |
| 1806 |
modrm_rm, modrm_r); |
| 1807 |
} else if (imm == 0xb2 || imm == 0xb4 || imm == 0xb5) { |
| 1808 |
modrm(cpu, MODRM_READ, mode, mode67, 0, |
| 1809 |
&instr, &ilen, NULL, NULL); |
| 1810 |
switch (imm) { |
| 1811 |
case 0xb2: mnem = "lss"; break; |
| 1812 |
case 0xb4: mnem = "lfs"; break; |
| 1813 |
case 0xb5: mnem = "lgs"; break; |
| 1814 |
} |
| 1815 |
SPACES; debug("%s\t%s,%s", mnem, |
| 1816 |
modrm_r, modrm_rm); |
| 1817 |
} else if (imm == 0xb6 || imm == 0xb7 || |
| 1818 |
imm == 0xbe || imm == 0xbf) { |
| 1819 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1820 |
(imm&1)==0? (MODRM_EIGHTBIT | |
| 1821 |
MODRM_R_NONEIGHTBIT) : MODRM_RM_16BIT, |
| 1822 |
&instr, &ilen, NULL, NULL); |
| 1823 |
mnem = "movsx"; |
| 1824 |
if (imm <= 0xb7) |
| 1825 |
mnem = "movzx"; |
| 1826 |
SPACES; debug("%s\t%s,%s", mnem, |
| 1827 |
modrm_r, modrm_rm); |
| 1828 |
} else if (imm == 0xba) { |
| 1829 |
int subop = (*instr >> 3) & 0x7; |
| 1830 |
switch (subop) { |
| 1831 |
case 4: modrm(cpu, MODRM_READ, mode, mode67, |
| 1832 |
0, &instr, &ilen, NULL, NULL); |
| 1833 |
imm2 = read_imm_and_print(&instr, |
| 1834 |
&ilen, 8); |
| 1835 |
SPACES; debug("bt\t%s,%i", |
| 1836 |
modrm_rm, imm2); |
| 1837 |
break; |
| 1838 |
case 5: modrm(cpu, MODRM_READ, mode, mode67, |
| 1839 |
0, &instr, &ilen, NULL, NULL); |
| 1840 |
imm2 = read_imm_and_print(&instr, |
| 1841 |
&ilen, 8); |
| 1842 |
SPACES; debug("bts\t%s,%i", |
| 1843 |
modrm_rm, imm2); |
| 1844 |
break; |
| 1845 |
case 6: modrm(cpu, MODRM_READ, mode, mode67, |
| 1846 |
0, &instr, &ilen, NULL, NULL); |
| 1847 |
imm2 = read_imm_and_print(&instr, |
| 1848 |
&ilen, 8); |
| 1849 |
SPACES; debug("btr\t%s,%i", |
| 1850 |
modrm_rm, imm2); |
| 1851 |
break; |
| 1852 |
case 7: modrm(cpu, MODRM_READ, mode, mode67, |
| 1853 |
0, &instr, &ilen, NULL, NULL); |
| 1854 |
imm2 = read_imm_and_print(&instr, |
| 1855 |
&ilen, 8); |
| 1856 |
SPACES; debug("btc\t%s,%i", |
| 1857 |
modrm_rm, imm2); |
| 1858 |
break; |
| 1859 |
default:SPACES; debug("UNIMPLEMENTED 0x%02x,0x" |
| 1860 |
"%02x,0x%02x", op, imm, *instr); |
| 1861 |
} |
| 1862 |
} else if (imm == 0xbc || imm == 0xbd) { |
| 1863 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1864 |
0, &instr, &ilen, NULL, NULL); |
| 1865 |
if (imm == 0xbc) |
| 1866 |
mnem = "bsf"; |
| 1867 |
else |
| 1868 |
mnem = "bsr"; |
| 1869 |
SPACES; debug("%s\t%s,%s", mnem, modrm_r, |
| 1870 |
modrm_rm); |
| 1871 |
} else if (imm == 0xc0 || imm == 0xc1) { |
| 1872 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1873 |
imm&1? 0 : MODRM_EIGHTBIT, |
| 1874 |
&instr, &ilen, NULL, NULL); |
| 1875 |
SPACES; debug("xadd\t%s,%s", modrm_rm, modrm_r); |
| 1876 |
} else if (imm == 0xc7) { |
| 1877 |
int subop = (*instr >> 3) & 0x7; |
| 1878 |
switch (subop) { |
| 1879 |
case 1: modrm(cpu, MODRM_READ, 64, mode67, |
| 1880 |
0, &instr, &ilen, NULL, NULL); |
| 1881 |
SPACES; debug("cmpxchg8b\t%s",modrm_rm); |
| 1882 |
break; |
| 1883 |
default:SPACES; debug("UNIMPLEMENTED 0x%02x,0x" |
| 1884 |
"%02x,0x%02x", op, imm, *instr); |
| 1885 |
} |
| 1886 |
} else if (imm >= 0xc8 && imm <= 0xcf) { |
| 1887 |
SPACES; debug("bswap\te%s", reg_names[imm & 7]); |
| 1888 |
} else { |
| 1889 |
SPACES; debug("UNIMPLEMENTED 0x0f,0x%02x", imm); |
| 1890 |
} |
| 1891 |
} |
| 1892 |
} else if (op < 0x20 && (op & 7) == 6) { |
| 1893 |
SPACES; debug("push\t%s", seg_names[op/8]); |
| 1894 |
} else if (op < 0x20 && (op & 7) == 7) { |
| 1895 |
SPACES; debug("pop\t%s", seg_names[op/8]); |
| 1896 |
} else if (op >= 0x20 && op < 0x40 && (op & 7) == 7) { |
| 1897 |
SPACES; debug("%sa%s", op < 0x30? "d" : "a", |
| 1898 |
(op & 0xf)==7? "a" : "s"); |
| 1899 |
} else if (op >= 0x40 && op <= 0x5f) { |
| 1900 |
switch (op & 0x38) { |
| 1901 |
case 0x00: mnem = "inc"; break; |
| 1902 |
case 0x08: mnem = "dec"; break; |
| 1903 |
case 0x10: mnem = "push"; break; |
| 1904 |
case 0x18: mnem = "pop"; break; |
| 1905 |
} |
| 1906 |
SPACES; debug("%s\t%s%s", mnem, e, reg_names[op & 7]); |
| 1907 |
} else if (op == 0x60) { |
| 1908 |
SPACES; debug("pusha%s", mode==16? "" : (mode==32? "d" : "q")); |
| 1909 |
} else if (op == 0x61) { |
| 1910 |
SPACES; debug("popa%s", mode==16? "" : (mode==32? "d" : "q")); |
| 1911 |
} else if (op == 0x62) { |
| 1912 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1913 |
0, &instr, &ilen, NULL, NULL); |
| 1914 |
SPACES; debug("bound\t%s,%s", modrm_r, modrm_rm); |
| 1915 |
} else if (op == 0x63) { |
| 1916 |
modrm(cpu, MODRM_READ, 16, mode67, |
| 1917 |
0, &instr, &ilen, NULL, NULL); |
| 1918 |
SPACES; debug("arpl\t%s,%s", modrm_rm, modrm_r); |
| 1919 |
} else if (op == 0x68) { |
| 1920 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 1921 |
SPACES; debug("push\t%sword 0x%x", mode==32?"d":"", imm); |
| 1922 |
} else if (op == 0x69 || op == 0x6b) { |
| 1923 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1924 |
0, &instr, &ilen, NULL, NULL); |
| 1925 |
if (op == 0x69) |
| 1926 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 1927 |
else |
| 1928 |
imm = (signed char)read_imm_and_print(&instr, &ilen, 8); |
| 1929 |
SPACES; debug("imul\t%s,%s,%i", modrm_r, modrm_rm, imm); |
| 1930 |
} else if (op == 0x6a) { |
| 1931 |
imm = (signed char)read_imm_and_print(&instr, &ilen, 8); |
| 1932 |
SPACES; debug("push\tbyte 0x%x", imm); |
| 1933 |
} else if (op == 0x6c) { |
| 1934 |
SPACES; debug("insb"); |
| 1935 |
} else if (op == 0x6d) { |
| 1936 |
SPACES; debug("ins%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 1937 |
} else if (op == 0x6e) { |
| 1938 |
SPACES; debug("outsb"); |
| 1939 |
} else if (op == 0x6f) { |
| 1940 |
SPACES; debug("outs%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 1941 |
} else if ((op & 0xf0) == 0x70) { |
| 1942 |
imm = (signed char)read_imm_and_print(&instr, &ilen, 8); |
| 1943 |
imm = dumpaddr + 2 + imm; |
| 1944 |
SPACES; debug("j%s%s\t0x%x", op&1? "n" : "", |
| 1945 |
cond_names[(op/2) & 0x7], imm); |
| 1946 |
} else if (op == 0x80 || op == 0x81) { |
| 1947 |
switch ((*instr >> 3) & 0x7) { |
| 1948 |
case 0: mnem = "add"; break; |
| 1949 |
case 1: mnem = "or"; break; |
| 1950 |
case 2: mnem = "adc"; break; |
| 1951 |
case 3: mnem = "sbb"; break; |
| 1952 |
case 4: mnem = "and"; break; |
| 1953 |
case 5: mnem = "sub"; break; |
| 1954 |
case 6: mnem = "xor"; break; |
| 1955 |
case 7: mnem = "cmp"; break; |
| 1956 |
default: |
| 1957 |
SPACES; debug("UNIMPLEMENTED 0x%02x", op); |
| 1958 |
} |
| 1959 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1960 |
op == 0x80? MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 1961 |
imm = read_imm_and_print(&instr, &ilen, op==0x80? 8 : mode); |
| 1962 |
SPACES; debug("%s\t%s,0x%x", mnem, modrm_rm, imm); |
| 1963 |
} else if (op == 0x83) { |
| 1964 |
switch ((*instr >> 3) & 0x7) { |
| 1965 |
case 0: mnem = "add"; break; |
| 1966 |
case 1: mnem = "or"; break; |
| 1967 |
case 2: mnem = "adc"; break; |
| 1968 |
case 3: mnem = "sbb"; break; |
| 1969 |
case 4: mnem = "and"; break; |
| 1970 |
case 5: mnem = "sub"; break; |
| 1971 |
case 6: mnem = "xor"; break; |
| 1972 |
case 7: mnem = "cmp"; break; |
| 1973 |
default: |
| 1974 |
SPACES; debug("UNIMPLEMENTED 0x%02x", op); |
| 1975 |
} |
| 1976 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, &ilen, |
| 1977 |
NULL, NULL); |
| 1978 |
imm = (signed char)read_imm_and_print(&instr, &ilen, 8); |
| 1979 |
SPACES; debug("%s\t%s,0x%x", mnem, modrm_rm, imm); |
| 1980 |
} else if (op == 0x84 || op == 0x85) { |
| 1981 |
modrm(cpu, MODRM_READ, mode, mode67, |
| 1982 |
op == 0x84? MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 1983 |
SPACES; debug("test\t%s,%s", modrm_rm, modrm_r); |
| 1984 |
} else if (op == 0x86 || op == 0x87) { |
| 1985 |
modrm(cpu, MODRM_READ, mode, mode67, op == 0x86? |
| 1986 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 1987 |
SPACES; debug("xchg\t%s,%s", modrm_rm, modrm_r); |
| 1988 |
} else if (op == 0x88 || op == 0x89) { |
| 1989 |
modrm(cpu, MODRM_READ, mode, mode67, op == 0x88? |
| 1990 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 1991 |
SPACES; debug("mov\t%s,%s", modrm_rm, modrm_r); |
| 1992 |
} else if (op == 0x8a || op == 0x8b) { |
| 1993 |
modrm(cpu, MODRM_READ, mode, mode67, op == 0x8a? |
| 1994 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 1995 |
SPACES; debug("mov\t%s,%s", modrm_r, modrm_rm); |
| 1996 |
} else if (op == 0x8c || op == 0x8e) { |
| 1997 |
modrm(cpu, MODRM_READ, mode, mode67, MODRM_SEG, &instr, &ilen, |
| 1998 |
NULL, NULL); |
| 1999 |
SPACES; debug("mov\t"); |
| 2000 |
if (op == 0x8c) |
| 2001 |
debug("%s,%s", modrm_rm, modrm_r); |
| 2002 |
else |
| 2003 |
debug("%s,%s", modrm_r, modrm_rm); |
| 2004 |
} else if (op == 0x8d) { |
| 2005 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, &ilen, |
| 2006 |
NULL, NULL); |
| 2007 |
SPACES; debug("lea\t%s,%s", modrm_r, modrm_rm); |
| 2008 |
} else if (op == 0x8f) { |
| 2009 |
switch ((*instr >> 3) & 0x7) { |
| 2010 |
case 0: /* POP m16/m32 */ |
| 2011 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2012 |
&ilen, NULL, NULL); |
| 2013 |
SPACES; debug("pop\t%sword %s", mode == 32? "d" : "", |
| 2014 |
modrm_rm); |
| 2015 |
break; |
| 2016 |
default: |
| 2017 |
SPACES; debug("UNIMPLEMENTED 0x%02x", op); |
| 2018 |
} |
| 2019 |
} else if (op == 0x90) { |
| 2020 |
SPACES; debug("nop"); |
| 2021 |
} else if (op >= 0x91 && op <= 0x97) { |
| 2022 |
SPACES; debug("xchg\t%sax,%s%s", e, e, reg_names[op & 7]); |
| 2023 |
} else if (op == 0x98) { |
| 2024 |
SPACES; debug("cbw"); |
| 2025 |
} else if (op == 0x99) { |
| 2026 |
SPACES; debug("cwd"); |
| 2027 |
} else if (op == 0x9a) { |
| 2028 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 2029 |
imm2 = read_imm_and_print(&instr, &ilen, 16); |
| 2030 |
SPACES; debug("call\t0x%04x:", imm2); |
| 2031 |
if (mode == 16) |
| 2032 |
debug("0x%04x", imm); |
| 2033 |
else |
| 2034 |
debug("0x%08x", imm); |
| 2035 |
} else if (op == 0x9b) { |
| 2036 |
SPACES; debug("wait"); |
| 2037 |
} else if (op == 0x9c) { |
| 2038 |
SPACES; debug("pushf%s", mode==16? "" : (mode==32? "d" : "q")); |
| 2039 |
} else if (op == 0x9d) { |
| 2040 |
SPACES; debug("popf%s", mode==16? "" : (mode==32? "d" : "q")); |
| 2041 |
} else if (op == 0x9e) { |
| 2042 |
SPACES; debug("sahf"); |
| 2043 |
} else if (op == 0x9f) { |
| 2044 |
SPACES; debug("lahf"); |
| 2045 |
} else if (op == 0xa0) { |
| 2046 |
imm = read_imm_and_print(&instr, &ilen, mode67); |
| 2047 |
SPACES; debug("mov\tal,[0x%x]", imm); |
| 2048 |
} else if (op == 0xa1) { |
| 2049 |
imm = read_imm_and_print(&instr, &ilen, mode67); |
| 2050 |
SPACES; debug("mov\t%sax,[0x%x]", e, imm); |
| 2051 |
} else if (op == 0xa2) { |
| 2052 |
imm = read_imm_and_print(&instr, &ilen, mode67); |
| 2053 |
SPACES; debug("mov\t[0x%x],al", imm); |
| 2054 |
} else if (op == 0xa3) { |
| 2055 |
imm = read_imm_and_print(&instr, &ilen, mode67); |
| 2056 |
SPACES; debug("mov\t[0x%x],%sax", imm, e); |
| 2057 |
} else if (op == 0xa4) { |
| 2058 |
SPACES; debug("movsb"); |
| 2059 |
} else if (op == 0xa5) { |
| 2060 |
SPACES; debug("movs%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 2061 |
} else if (op == 0xa6) { |
| 2062 |
SPACES; debug("cmpsb"); |
| 2063 |
} else if (op == 0xa7) { |
| 2064 |
SPACES; debug("cmps%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 2065 |
} else if (op == 0xa8 || op == 0xa9) { |
| 2066 |
imm = read_imm_and_print(&instr, &ilen, op == 0xa8? 8 : mode); |
| 2067 |
if (op == 0xa8) |
| 2068 |
mnem = "al"; |
| 2069 |
else if (mode == 16) |
| 2070 |
mnem = "ax"; |
| 2071 |
else |
| 2072 |
mnem = "eax"; |
| 2073 |
SPACES; debug("test\t%s,0x%x", mnem, imm); |
| 2074 |
} else if (op == 0xaa) { |
| 2075 |
SPACES; debug("stosb"); |
| 2076 |
} else if (op == 0xab) { |
| 2077 |
SPACES; debug("stos%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 2078 |
} else if (op == 0xac) { |
| 2079 |
SPACES; debug("lodsb"); |
| 2080 |
} else if (op == 0xad) { |
| 2081 |
SPACES; debug("lods%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 2082 |
} else if (op == 0xae) { |
| 2083 |
SPACES; debug("scasb"); |
| 2084 |
} else if (op == 0xaf) { |
| 2085 |
SPACES; debug("scas%s", mode==16? "w" : (mode==32? "d" : "q")); |
| 2086 |
} else if (op >= 0xb0 && op <= 0xb7) { |
| 2087 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2088 |
SPACES; debug("mov\t%s,0x%x", reg_names_bytes[op&7], imm); |
| 2089 |
} else if (op >= 0xb8 && op <= 0xbf) { |
| 2090 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 2091 |
SPACES; debug("mov\t%s%s,0x%x", e, reg_names[op & 7], imm); |
| 2092 |
} else if (op == 0xc0 || op == 0xc1) { |
| 2093 |
switch ((*instr >> 3) & 0x7) { |
| 2094 |
case 0: mnem = "rol"; break; |
| 2095 |
case 1: mnem = "ror"; break; |
| 2096 |
case 2: mnem = "rcl"; break; |
| 2097 |
case 3: mnem = "rcr"; break; |
| 2098 |
case 4: mnem = "shl"; break; |
| 2099 |
case 5: mnem = "shr"; break; |
| 2100 |
case 6: mnem = "sal"; break; |
| 2101 |
case 7: mnem = "sar"; break; |
| 2102 |
} |
| 2103 |
modrm(cpu, MODRM_READ, mode, mode67, op == 0xc0? |
| 2104 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2105 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2106 |
SPACES; debug("%s\t%s,%i", mnem, modrm_rm, imm); |
| 2107 |
} else if (op == 0xc2) { |
| 2108 |
imm = read_imm_and_print(&instr, &ilen, 16); |
| 2109 |
SPACES; debug("ret\t0x%x", imm); |
| 2110 |
} else if (op == 0xc3) { |
| 2111 |
SPACES; debug("ret"); |
| 2112 |
} else if (op == 0xc4 || op == 0xc5) { |
| 2113 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, &ilen, |
| 2114 |
NULL, NULL); |
| 2115 |
switch (op) { |
| 2116 |
case 0xc4: mnem = "les"; break; |
| 2117 |
case 0xc5: mnem = "lds"; break; |
| 2118 |
} |
| 2119 |
SPACES; debug("%s\t%s,%s", mnem, modrm_r, modrm_rm); |
| 2120 |
} else if (op == 0xc6 || op == 0xc7) { |
| 2121 |
switch ((*instr >> 3) & 0x7) { |
| 2122 |
case 0: modrm(cpu, MODRM_READ, mode, mode67, op == 0xc6? |
| 2123 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2124 |
imm = read_imm_and_print(&instr, &ilen, |
| 2125 |
op == 0xc6? 8 : mode); |
| 2126 |
SPACES; debug("mov\t%s,0x%x", modrm_rm, imm); |
| 2127 |
break; |
| 2128 |
default: |
| 2129 |
SPACES; debug("UNIMPLEMENTED 0x%02x", op); |
| 2130 |
} |
| 2131 |
} else if (op == 0xc8) { |
| 2132 |
imm = read_imm_and_print(&instr, &ilen, 16); |
| 2133 |
imm2 = read_imm_and_print(&instr, &ilen, 8); |
| 2134 |
SPACES; debug("enter\t0x%x,%i", imm, imm2); |
| 2135 |
} else if (op == 0xc9) { |
| 2136 |
SPACES; debug("leave"); |
| 2137 |
} else if (op == 0xca) { |
| 2138 |
imm = read_imm_and_print(&instr, &ilen, 16); |
| 2139 |
SPACES; debug("retf\t0x%x", imm); |
| 2140 |
} else if (op == 0xcb) { |
| 2141 |
SPACES; debug("retf"); |
| 2142 |
} else if (op == 0xcc) { |
| 2143 |
SPACES; debug("int3"); |
| 2144 |
} else if (op == 0xcd) { |
| 2145 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2146 |
SPACES; debug("int\t0x%x", imm); |
| 2147 |
} else if (op == 0xce) { |
| 2148 |
SPACES; debug("into"); |
| 2149 |
} else if (op == 0xcf) { |
| 2150 |
SPACES; debug("iret"); |
| 2151 |
} else if (op >= 0xd0 && op <= 0xd3) { |
| 2152 |
int subop = (*instr >> 3) & 0x7; |
| 2153 |
modrm(cpu, MODRM_READ, mode, mode67, op&1? 0 : |
| 2154 |
MODRM_EIGHTBIT, &instr, &ilen, NULL, NULL); |
| 2155 |
switch (subop) { |
| 2156 |
case 0: mnem = "rol"; break; |
| 2157 |
case 1: mnem = "ror"; break; |
| 2158 |
case 2: mnem = "rcl"; break; |
| 2159 |
case 3: mnem = "rcr"; break; |
| 2160 |
case 4: mnem = "shl"; break; |
| 2161 |
case 5: mnem = "shr"; break; |
| 2162 |
case 6: mnem = "sal"; break; |
| 2163 |
case 7: mnem = "sar"; break; |
| 2164 |
} |
| 2165 |
SPACES; debug("%s\t%s,", mnem, modrm_rm); |
| 2166 |
if (op <= 0xd1) |
| 2167 |
debug("1"); |
| 2168 |
else |
| 2169 |
debug("cl"); |
| 2170 |
} else if (op == 0xd4) { |
| 2171 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2172 |
SPACES; debug("aam"); |
| 2173 |
if (imm != 10) |
| 2174 |
debug("\t%i", imm); |
| 2175 |
} else if (op == 0xd5) { |
| 2176 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2177 |
SPACES; debug("aad"); |
| 2178 |
if (imm != 10) |
| 2179 |
debug("\t%i", imm); |
| 2180 |
} else if (op == 0xd6) { |
| 2181 |
SPACES; debug("salc"); /* undocumented? */ |
| 2182 |
} else if (op == 0xd7) { |
| 2183 |
SPACES; debug("xlat"); |
| 2184 |
} else if (op == 0xd9) { |
| 2185 |
int subop = (*instr >> 3) & 7; |
| 2186 |
imm = *instr; |
| 2187 |
if (subop == 5) { |
| 2188 |
modrm(cpu, MODRM_READ, 16, mode67, 0, |
| 2189 |
&instr, &ilen, NULL, NULL); |
| 2190 |
SPACES; debug("fldcw\t%s", modrm_rm); |
| 2191 |
} else if (subop == 7) { |
| 2192 |
modrm(cpu, MODRM_READ, 16, mode67, 0, |
| 2193 |
&instr, &ilen, NULL, NULL); |
| 2194 |
SPACES; debug("fstcw\t%s", modrm_rm); |
| 2195 |
} else { |
| 2196 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op, imm); |
| 2197 |
} |
| 2198 |
} else if (op == 0xdb) { |
| 2199 |
imm = *instr; |
| 2200 |
if (imm == 0xe2) { |
| 2201 |
read_imm_and_print(&instr, &ilen, 8); |
| 2202 |
SPACES; debug("fclex"); |
| 2203 |
} else if (imm == 0xe3) { |
| 2204 |
read_imm_and_print(&instr, &ilen, 8); |
| 2205 |
SPACES; debug("finit"); |
| 2206 |
} else if (imm == 0xe4) { |
| 2207 |
read_imm_and_print(&instr, &ilen, 8); |
| 2208 |
SPACES; debug("fsetpm"); |
| 2209 |
} else { |
| 2210 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op, imm); |
| 2211 |
} |
| 2212 |
} else if (op == 0xdd) { |
| 2213 |
int subop = (*instr >> 3) & 7; |
| 2214 |
imm = *instr; |
| 2215 |
if (subop == 7) { |
| 2216 |
modrm(cpu, MODRM_READ, 16, mode67, 0, |
| 2217 |
&instr, &ilen, NULL, NULL); |
| 2218 |
SPACES; debug("fstsw\t%s", modrm_rm); |
| 2219 |
} else { |
| 2220 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op, imm); |
| 2221 |
} |
| 2222 |
} else if (op == 0xdf) { |
| 2223 |
imm = *instr; |
| 2224 |
if (imm == 0xe0) { |
| 2225 |
read_imm_and_print(&instr, &ilen, 8); |
| 2226 |
SPACES; debug("fstsw\tax"); |
| 2227 |
} else { |
| 2228 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op, imm); |
| 2229 |
} |
| 2230 |
} else if (op == 0xe3) { |
| 2231 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2232 |
imm = dumpaddr + ilen + (signed char)imm; |
| 2233 |
if (mode == 16) |
| 2234 |
mnem = "jcxz"; |
| 2235 |
else |
| 2236 |
mnem = "jecxz"; |
| 2237 |
SPACES; debug("%s\t0x%x", mnem, imm); |
| 2238 |
} else if (op == 0xe4) { |
| 2239 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2240 |
SPACES; debug("in\tal,0x%x", imm); |
| 2241 |
} else if (op == 0xe5) { |
| 2242 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2243 |
SPACES; debug("in\t%sax,0x%x", e, imm); |
| 2244 |
} else if (op == 0xe6) { |
| 2245 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2246 |
SPACES; debug("out\t0x%x,al", imm); |
| 2247 |
} else if (op == 0xe7) { |
| 2248 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2249 |
SPACES; debug("out\t0x%x,%sax", imm, e); |
| 2250 |
} else if (op == 0xe8 || op == 0xe9) { |
| 2251 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 2252 |
if (mode == 16) |
| 2253 |
imm = (int16_t)imm; |
| 2254 |
imm = dumpaddr + ilen + imm; |
| 2255 |
switch (op) { |
| 2256 |
case 0xe8: mnem = "call"; break; |
| 2257 |
case 0xe9: mnem = "jmp"; break; |
| 2258 |
} |
| 2259 |
SPACES; debug("%s\t0x%x", mnem, imm); |
| 2260 |
} else if (op == 0xea) { |
| 2261 |
imm = read_imm_and_print(&instr, &ilen, mode); |
| 2262 |
imm2 = read_imm_and_print(&instr, &ilen, 16); |
| 2263 |
SPACES; debug("jmp\t0x%04x:", imm2); |
| 2264 |
if (mode == 16) |
| 2265 |
debug("0x%04x", imm); |
| 2266 |
else |
| 2267 |
debug("0x%08x", imm); |
| 2268 |
} else if ((op >= 0xe0 && op <= 0xe2) || op == 0xeb) { |
| 2269 |
imm = read_imm_and_print(&instr, &ilen, 8); |
| 2270 |
imm = dumpaddr + ilen + (signed char)imm; |
| 2271 |
switch (op) { |
| 2272 |
case 0xe0: mnem = "loopnz"; break; |
| 2273 |
case 0xe1: mnem = "loopz"; break; |
| 2274 |
case 0xe2: mnem = "loop"; break; |
| 2275 |
case 0xeb: mnem = "jmp"; break; |
| 2276 |
} |
| 2277 |
SPACES; debug("%s\t0x%x", mnem, imm); |
| 2278 |
} else if (op == 0xec) { |
| 2279 |
SPACES; debug("in\tal,dx"); |
| 2280 |
} else if (op == 0xed) { |
| 2281 |
SPACES; debug("in\t%sax,dx", e); |
| 2282 |
} else if (op == 0xee) { |
| 2283 |
SPACES; debug("out\tdx,al"); |
| 2284 |
} else if (op == 0xef) { |
| 2285 |
SPACES; debug("out\tdx,%sax", e); |
| 2286 |
} else if (op == 0xf1) { |
| 2287 |
SPACES; debug("icebp"); /* undocumented? */ |
| 2288 |
/* http://www.x86.org/secrets/opcodes/icebp.htm */ |
| 2289 |
} else if (op == 0xf4) { |
| 2290 |
SPACES; debug("hlt"); |
| 2291 |
} else if (op == 0xf5) { |
| 2292 |
SPACES; debug("cmc"); |
| 2293 |
} else if (op == 0xf8) { |
| 2294 |
SPACES; debug("clc"); |
| 2295 |
} else if (op == 0xf9) { |
| 2296 |
SPACES; debug("stc"); |
| 2297 |
} else if (op == 0xfa) { |
| 2298 |
SPACES; debug("cli"); |
| 2299 |
} else if (op == 0xfb) { |
| 2300 |
SPACES; debug("sti"); |
| 2301 |
} else if (op == 0xfc) { |
| 2302 |
SPACES; debug("cld"); |
| 2303 |
} else if (op == 0xfd) { |
| 2304 |
SPACES; debug("std"); |
| 2305 |
} else if (op == 0xf6 || op == 0xf7) { |
| 2306 |
switch ((*instr >> 3) & 0x7) { |
| 2307 |
case 0: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2308 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2309 |
imm = read_imm_and_print(&instr, &ilen, |
| 2310 |
op == 0xf6? 8 : mode); |
| 2311 |
SPACES; debug("test\t%s,0x%x", modrm_rm, imm); |
| 2312 |
break; |
| 2313 |
case 2: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2314 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2315 |
SPACES; debug("not\t%s", modrm_rm); |
| 2316 |
break; |
| 2317 |
case 3: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2318 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2319 |
SPACES; debug("neg\t%s", modrm_rm); |
| 2320 |
break; |
| 2321 |
case 4: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2322 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2323 |
SPACES; debug("mul\t%s", modrm_rm); |
| 2324 |
break; |
| 2325 |
case 5: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2326 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2327 |
SPACES; debug("imul\t%s", modrm_rm); |
| 2328 |
break; |
| 2329 |
case 6: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2330 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2331 |
SPACES; debug("div\t%s", modrm_rm); |
| 2332 |
break; |
| 2333 |
case 7: modrm(cpu, MODRM_READ, mode, mode67, op == 0xf6? |
| 2334 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2335 |
SPACES; debug("idiv\t%s", modrm_rm); |
| 2336 |
break; |
| 2337 |
default: |
| 2338 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op,*instr); |
| 2339 |
} |
| 2340 |
} else if (op == 0xfe || op == 0xff) { |
| 2341 |
/* FE /0 = inc r/m8 */ |
| 2342 |
/* FE /1 = dec r/m8 */ |
| 2343 |
/* FF /2 = call near rm16/32 */ |
| 2344 |
/* FF /3 = call far m16:32 */ |
| 2345 |
/* FF /6 = push r/m16/32 */ |
| 2346 |
switch ((*instr >> 3) & 0x7) { |
| 2347 |
case 0: modrm(cpu, MODRM_READ, mode, mode67, op == 0xfe? |
| 2348 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2349 |
SPACES; debug("inc\t%s", modrm_rm); |
| 2350 |
break; |
| 2351 |
case 1: modrm(cpu, MODRM_READ, mode, mode67, op == 0xfe? |
| 2352 |
MODRM_EIGHTBIT : 0, &instr, &ilen, NULL, NULL); |
| 2353 |
SPACES; debug("dec\t%s", modrm_rm); |
| 2354 |
break; |
| 2355 |
case 2: if (op == 0xfe) { |
| 2356 |
SPACES; debug("UNIMPLEMENTED " |
| 2357 |
"0x%02x,0x%02x", op,*instr); |
| 2358 |
} else { |
| 2359 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2360 |
&ilen, NULL, NULL); |
| 2361 |
SPACES; debug("call\t%s", modrm_rm); |
| 2362 |
} |
| 2363 |
break; |
| 2364 |
case 3: if (op == 0xfe) { |
| 2365 |
SPACES; debug("UNIMPLEMENTED " |
| 2366 |
"0x%02x,0x%02x", op,*instr); |
| 2367 |
} else { |
| 2368 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2369 |
&ilen, NULL, NULL); |
| 2370 |
SPACES; debug("call\tfar %s", modrm_rm); |
| 2371 |
} |
| 2372 |
break; |
| 2373 |
case 4: if (op == 0xfe) { |
| 2374 |
SPACES; debug("UNIMPLEMENTED " |
| 2375 |
"0x%02x,0x%02x", op,*instr); |
| 2376 |
} else { |
| 2377 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2378 |
&ilen, NULL, NULL); |
| 2379 |
SPACES; debug("jmp\t%s", modrm_rm); |
| 2380 |
} |
| 2381 |
break; |
| 2382 |
case 5: if (op == 0xfe) { |
| 2383 |
SPACES; debug("UNIMPLEMENTED " |
| 2384 |
"0x%02x,0x%02x", op,*instr); |
| 2385 |
} else { |
| 2386 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2387 |
&ilen, NULL, NULL); |
| 2388 |
SPACES; debug("jmp\tfar %s", modrm_rm); |
| 2389 |
} |
| 2390 |
break; |
| 2391 |
case 6: if (op == 0xfe) { |
| 2392 |
SPACES; debug("UNIMPLEMENTED " |
| 2393 |
"0x%02x,0x%02x", op,*instr); |
| 2394 |
} else { |
| 2395 |
modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 2396 |
&ilen, NULL, NULL); |
| 2397 |
SPACES; debug("push\t%sword %s", |
| 2398 |
mode == 32? "d" : "", modrm_rm); |
| 2399 |
} |
| 2400 |
break; |
| 2401 |
default: |
| 2402 |
SPACES; debug("UNIMPLEMENTED 0x%02x,0x%02x", op,*instr); |
| 2403 |
} |
| 2404 |
} else { |
| 2405 |
SPACES; debug("UNIMPLEMENTED 0x%02x", op); |
| 2406 |
} |
| 2407 |
|
| 2408 |
switch (rep) { |
| 2409 |
case REP_REP: debug(" (rep)"); break; |
| 2410 |
case REP_REPNE: debug(" (repne)"); break; |
| 2411 |
} |
| 2412 |
if (prefix != NULL) |
| 2413 |
debug(" (%s)", prefix); |
| 2414 |
if (lock) |
| 2415 |
debug(" (lock)"); |
| 2416 |
|
| 2417 |
debug("\n"); |
| 2418 |
return ilen; |
| 2419 |
} |
| 2420 |
|
| 2421 |
|
| 2422 |
/* |
| 2423 |
* x86_cpuid(): |
| 2424 |
* |
| 2425 |
* TODO: Level 1 and 2 info. |
| 2426 |
*/ |
| 2427 |
static void x86_cpuid(struct cpu *cpu) |
| 2428 |
{ |
| 2429 |
switch (cpu->cd.x86.r[X86_R_AX]) { |
| 2430 |
/* Normal CPU id: */ |
| 2431 |
case 0: cpu->cd.x86.r[X86_R_AX] = 2; |
| 2432 |
/* Intel... */ |
| 2433 |
cpu->cd.x86.r[X86_R_BX] = 0x756e6547; /* "Genu" */ |
| 2434 |
cpu->cd.x86.r[X86_R_DX] = 0x49656e69; /* "ineI" */ |
| 2435 |
cpu->cd.x86.r[X86_R_CX] = 0x6c65746e; /* "ntel" */ |
| 2436 |
/* ... or AMD: */ |
| 2437 |
cpu->cd.x86.r[X86_R_BX] = 0x68747541; /* "Auth" */ |
| 2438 |
cpu->cd.x86.r[X86_R_DX] = 0x69746E65; /* "enti" */ |
| 2439 |
cpu->cd.x86.r[X86_R_CX] = 0x444D4163; /* "cAMD" */ |
| 2440 |
break; |
| 2441 |
case 1: /* TODO */ |
| 2442 |
cpu->cd.x86.r[X86_R_AX] = 0x0623; |
| 2443 |
cpu->cd.x86.r[X86_R_BX] = (cpu->cpu_id << 24); |
| 2444 |
/* TODO: are bits 8..15 the _total_ nr of cpus, or the |
| 2445 |
cpu id of this one? */ |
| 2446 |
cpu->cd.x86.r[X86_R_CX] = X86_CPUID_ECX_CX16; |
| 2447 |
cpu->cd.x86.r[X86_R_DX] = X86_CPUID_EDX_CX8 | X86_CPUID_EDX_FPU |
| 2448 |
| X86_CPUID_EDX_MSR | X86_CPUID_EDX_TSC | X86_CPUID_EDX_MTRR |
| 2449 |
| X86_CPUID_EDX_CMOV | X86_CPUID_EDX_PSE | |
| 2450 |
X86_CPUID_EDX_SEP | X86_CPUID_EDX_PGE | |
| 2451 |
X86_CPUID_EDX_MMX | X86_CPUID_EDX_FXSR; |
| 2452 |
break; |
| 2453 |
case 2: /* TODO: actual Cache info */ |
| 2454 |
/* This is just bogus */ |
| 2455 |
cpu->cd.x86.r[X86_R_AX] = 0x03020101; |
| 2456 |
cpu->cd.x86.r[X86_R_BX] = 0x00000000; |
| 2457 |
cpu->cd.x86.r[X86_R_CX] = 0x00000000; |
| 2458 |
cpu->cd.x86.r[X86_R_DX] = 0x06040a42; |
| 2459 |
break; |
| 2460 |
|
| 2461 |
/* Extended CPU id: */ |
| 2462 |
case 0x80000000: |
| 2463 |
cpu->cd.x86.r[X86_R_AX] = 0x80000008; |
| 2464 |
/* AMD... */ |
| 2465 |
cpu->cd.x86.r[X86_R_BX] = 0x68747541; |
| 2466 |
cpu->cd.x86.r[X86_R_DX] = 0x444D4163; |
| 2467 |
cpu->cd.x86.r[X86_R_CX] = 0x69746E65; |
| 2468 |
break; |
| 2469 |
case 0x80000001: |
| 2470 |
cpu->cd.x86.r[X86_R_AX] = 0; |
| 2471 |
cpu->cd.x86.r[X86_R_BX] = 0; |
| 2472 |
cpu->cd.x86.r[X86_R_CX] = 0; |
| 2473 |
cpu->cd.x86.r[X86_R_DX] = (cpu->cd.x86.model.model_number |
| 2474 |
>= X86_MODEL_AMD64)? X86_CPUID_EXT_EDX_LM : 0; |
| 2475 |
break; |
| 2476 |
case 0x80000002: |
| 2477 |
case 0x80000003: |
| 2478 |
case 0x80000004: |
| 2479 |
case 0x80000005: |
| 2480 |
case 0x80000006: |
| 2481 |
case 0x80000007: |
| 2482 |
fatal("[ CPUID 0x%08x ]\n", (int)cpu->cd.x86.r[X86_R_AX]); |
| 2483 |
cpu->cd.x86.r[X86_R_AX] = 0; |
| 2484 |
cpu->cd.x86.r[X86_R_BX] = 0; |
| 2485 |
cpu->cd.x86.r[X86_R_CX] = 0; |
| 2486 |
cpu->cd.x86.r[X86_R_DX] = 0; |
| 2487 |
break; |
| 2488 |
case 0x80000008: |
| 2489 |
cpu->cd.x86.r[X86_R_AX] = 0x00003028; |
| 2490 |
cpu->cd.x86.r[X86_R_BX] = 0; |
| 2491 |
cpu->cd.x86.r[X86_R_CX] = 0; |
| 2492 |
cpu->cd.x86.r[X86_R_DX] = 0; |
| 2493 |
break; |
| 2494 |
default:fatal("x86_cpuid(): unimplemented eax = 0x%x\n", |
| 2495 |
(int)cpu->cd.x86.r[X86_R_AX]); |
| 2496 |
cpu->running = 0; |
| 2497 |
} |
| 2498 |
} |
| 2499 |
|
| 2500 |
|
| 2501 |
#define TRANSLATE_ADDRESS translate_address_x86 |
| 2502 |
#include "memory_x86.c" |
| 2503 |
#undef TRANSLATE_ADDRESS |
| 2504 |
|
| 2505 |
|
| 2506 |
#define MEMORY_RW x86_memory_rw |
| 2507 |
#define MEM_X86 |
| 2508 |
#include "memory_rw.c" |
| 2509 |
#undef MEM_X86 |
| 2510 |
#undef MEMORY_RW |
| 2511 |
|
| 2512 |
|
| 2513 |
/* |
| 2514 |
* x86_push(): |
| 2515 |
*/ |
| 2516 |
static int x86_push(struct cpu *cpu, uint64_t value, int mode) |
| 2517 |
{ |
| 2518 |
int res = 1, oldseg; |
| 2519 |
int ssize = cpu->cd.x86.descr_cache[X86_S_SS].default_op_size; |
| 2520 |
uint64_t new_esp; |
| 2521 |
uint64_t old_esp = cpu->cd.x86.r[X86_R_SP]; |
| 2522 |
uint16_t old_ss = cpu->cd.x86.s[X86_S_SS]; |
| 2523 |
uint64_t old_eip = cpu->pc; |
| 2524 |
uint16_t old_cs = cpu->cd.x86.s[X86_S_CS]; |
| 2525 |
|
| 2526 |
/* TODO: up/down? */ |
| 2527 |
/* TODO: stacksize? */ |
| 2528 |
ssize = mode; |
| 2529 |
|
| 2530 |
oldseg = cpu->cd.x86.cursegment; |
| 2531 |
cpu->cd.x86.cursegment = X86_S_SS; |
| 2532 |
if (ssize == 16) |
| 2533 |
new_esp = (cpu->cd.x86.r[X86_R_SP] & ~0xffff) |
| 2534 |
| ((cpu->cd.x86.r[X86_R_SP] - (ssize / 8)) & 0xffff); |
| 2535 |
else |
| 2536 |
new_esp = (cpu->cd.x86.r[X86_R_SP] - |
| 2537 |
(ssize / 8)) & 0xffffffff; |
| 2538 |
res = x86_store(cpu, new_esp, value, ssize / 8); |
| 2539 |
if (!res) { |
| 2540 |
fatal("WARNING: x86_push store failed: cs:eip=0x%04x:0x%08x" |
| 2541 |
" ss:esp=0x%04x:0x%08x\n", (int)old_cs, |
| 2542 |
(int)old_eip, (int)old_ss, (int)old_esp); |
| 2543 |
if ((old_cs & X86_PL_MASK) != X86_RING3) |
| 2544 |
cpu->running = 0; |
| 2545 |
} else { |
| 2546 |
cpu->cd.x86.r[X86_R_SP] = new_esp; |
| 2547 |
} |
| 2548 |
cpu->cd.x86.cursegment = oldseg; |
| 2549 |
return res; |
| 2550 |
} |
| 2551 |
|
| 2552 |
|
| 2553 |
/* |
| 2554 |
* x86_pop(): |
| 2555 |
*/ |
| 2556 |
static int x86_pop(struct cpu *cpu, uint64_t *valuep, int mode) |
| 2557 |
{ |
| 2558 |
int res = 1, oldseg; |
| 2559 |
int ssize = cpu->cd.x86.descr_cache[X86_S_SS].default_op_size; |
| 2560 |
|
| 2561 |
/* TODO: up/down? */ |
| 2562 |
/* TODO: stacksize? */ |
| 2563 |
ssize = mode; |
| 2564 |
|
| 2565 |
oldseg = cpu->cd.x86.cursegment; |
| 2566 |
cpu->cd.x86.cursegment = X86_S_SS; |
| 2567 |
res = x86_load(cpu, cpu->cd.x86.r[X86_R_SP], valuep, ssize / 8); |
| 2568 |
if (!res) { |
| 2569 |
fatal("WARNING: x86_pop load failed\n"); |
| 2570 |
} else { |
| 2571 |
if (ssize == 16) |
| 2572 |
cpu->cd.x86.r[X86_R_SP] = (cpu->cd.x86.r[X86_R_SP] & |
| 2573 |
~0xffff) | ((cpu->cd.x86.r[X86_R_SP] + (ssize / 8)) |
| 2574 |
& 0xffff); |
| 2575 |
else |
| 2576 |
cpu->cd.x86.r[X86_R_SP] = (cpu->cd.x86.r[X86_R_SP] + |
| 2577 |
(ssize / 8)) & 0xffffffff; |
| 2578 |
} |
| 2579 |
cpu->cd.x86.cursegment = oldseg; |
| 2580 |
return res; |
| 2581 |
} |
| 2582 |
|
| 2583 |
|
| 2584 |
#define INT_TYPE_CALLGATE 1 |
| 2585 |
#define INT_TYPE_INTGATE 2 |
| 2586 |
#define INT_TYPE_TRAPGATE 3 |
| 2587 |
/* |
| 2588 |
* x86_interrupt(): |
| 2589 |
* |
| 2590 |
* Read the interrupt descriptor table (or, in real mode, the interrupt |
| 2591 |
* vector table), push flags/cs/eip, and jump to the interrupt handler. |
| 2592 |
*/ |
| 2593 |
int x86_interrupt(struct cpu *cpu, int nr, int errcode) |
| 2594 |
{ |
| 2595 |
uint16_t seg, old_cs; |
| 2596 |
uint32_t ofs; |
| 2597 |
int res, mode; |
| 2598 |
unsigned char buf[8]; |
| 2599 |
|
| 2600 |
old_cs = cpu->cd.x86.s[X86_S_CS]; |
| 2601 |
|
| 2602 |
debug("{ x86_interrupt %i }\n", nr); |
| 2603 |
|
| 2604 |
if (PROTECTED_MODE) { |
| 2605 |
int i, int_type = 0; |
| 2606 |
|
| 2607 |
if (nr * 8 > cpu->cd.x86.idtr_limit) { |
| 2608 |
fatal("TODO: protected mode int 0x%02x outside idtr" |
| 2609 |
" limit (%i)?\n", nr, (int)cpu->cd.x86.idtr_limit); |
| 2610 |
cpu->running = 0; |
| 2611 |
return 0; |
| 2612 |
} |
| 2613 |
|
| 2614 |
/* Read the interrupt descriptor: */ |
| 2615 |
res = cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.idtr + nr*8, |
| 2616 |
buf, 8, MEM_READ, NO_SEGMENTATION); |
| 2617 |
if (!res) { |
| 2618 |
fatal("x86_interrupt(): could not read the" |
| 2619 |
" interrupt descriptor table (prot. mode)\n"); |
| 2620 |
cpu->running = 0; |
| 2621 |
return 0; |
| 2622 |
} |
| 2623 |
|
| 2624 |
if ((buf[5] & 0x17) == 0x04) |
| 2625 |
int_type = INT_TYPE_CALLGATE; |
| 2626 |
if ((buf[5] & 0x17) == 0x06) |
| 2627 |
int_type = INT_TYPE_INTGATE; |
| 2628 |
if ((buf[5] & 0x17) == 0x07) |
| 2629 |
int_type = INT_TYPE_TRAPGATE; |
| 2630 |
|
| 2631 |
if (!int_type) { |
| 2632 |
fatal("x86_interrupt(): TODO:\n"); |
| 2633 |
for (i=0; i<8; i++) |
| 2634 |
fatal(" %02x", buf[i]); |
| 2635 |
fatal("\n"); |
| 2636 |
cpu->running = 0; |
| 2637 |
return 0; |
| 2638 |
} |
| 2639 |
|
| 2640 |
seg = buf[2] + (buf[3] << 8); |
| 2641 |
ofs = buf[0] + (buf[1] << 8) + (buf[6] << 16) + (buf[7] << 24); |
| 2642 |
|
| 2643 |
switch (int_type) { |
| 2644 |
case INT_TYPE_INTGATE: |
| 2645 |
case INT_TYPE_TRAPGATE: |
| 2646 |
break; |
| 2647 |
default: |
| 2648 |
fatal("INT type: %i, cs:eip = 0x%04x:0x%08x\n", |
| 2649 |
int_type, (int)seg, (int)ofs); |
| 2650 |
cpu->running = 0; |
| 2651 |
return 0; |
| 2652 |
} |
| 2653 |
|
| 2654 |
reload_segment_descriptor(cpu, X86_S_CS, seg, &cpu->pc); |
| 2655 |
|
| 2656 |
/* |
| 2657 |
* If we're changing privilege level, the we should change |
| 2658 |
* stack here, and push the old SS:ESP. |
| 2659 |
*/ |
| 2660 |
if ((seg & X86_PL_MASK) < (old_cs & X86_PL_MASK)) { |
| 2661 |
unsigned char buf[16]; |
| 2662 |
uint16_t new_ss, old_ss; |
| 2663 |
uint32_t new_esp, old_esp; |
| 2664 |
int pl; |
| 2665 |
|
| 2666 |
pl = seg & X86_PL_MASK; |
| 2667 |
|
| 2668 |
/* Load SSx:ESPx from the Task State Segment: */ |
| 2669 |
if (cpu->cd.x86.tr < 4) |
| 2670 |
fatal("WARNING: interrupt with stack switch" |
| 2671 |
", but task register = 0?\n"); |
| 2672 |
|
| 2673 |
/* fatal("::: old SS:ESP=0x%04x:0x%08x\n", |
| 2674 |
(int)cpu->cd.x86.s[X86_S_SS], |
| 2675 |
(int)cpu->cd.x86.r[X86_R_SP]); */ |
| 2676 |
|
| 2677 |
if (!cpu->memory_rw(cpu, cpu->mem, 4 + pl*8 + |
| 2678 |
cpu->cd.x86.tr_base, buf, sizeof(buf), MEM_READ, |
| 2679 |
NO_SEGMENTATION)) { |
| 2680 |
fatal("ERROR: couldn't read tss blah blah\n"); |
| 2681 |
cpu->running = 0; |
| 2682 |
return 0; |
| 2683 |
} |
| 2684 |
|
| 2685 |
new_esp = buf[0] + (buf[1] << 8) + |
| 2686 |
(buf[2] << 16) + (buf[3] << 24); |
| 2687 |
new_ss = buf[4] + (buf[5] << 8); |
| 2688 |
|
| 2689 |
old_ss = cpu->cd.x86.s[X86_S_SS]; |
| 2690 |
old_esp = cpu->cd.x86.r[X86_R_SP]; |
| 2691 |
|
| 2692 |
reload_segment_descriptor(cpu, X86_S_SS, new_ss, NULL); |
| 2693 |
cpu->cd.x86.r[X86_R_SP] = new_esp; |
| 2694 |
|
| 2695 |
fatal("::: Switching Stack: new SS:ESP=0x%04x:0x%08x\n", |
| 2696 |
(int)new_ss, (int)new_esp); |
| 2697 |
|
| 2698 |
mode = cpu->cd.x86.descr_cache[X86_S_CS]. |
| 2699 |
default_op_size; |
| 2700 |
|
| 2701 |
if (!x86_push(cpu, old_ss, mode)) { |
| 2702 |
fatal("TODO: problem adgsadg 1\n"); |
| 2703 |
cpu->running = 0; |
| 2704 |
} |
| 2705 |
if (!x86_push(cpu, old_esp, mode)) { |
| 2706 |
fatal("TODO: problem adgsadg 2\n"); |
| 2707 |
cpu->running = 0; |
| 2708 |
} |
| 2709 |
} |
| 2710 |
|
| 2711 |
/* Push flags, cs, and ip (pc): */ |
| 2712 |
mode = cpu->cd.x86.descr_cache[X86_S_CS].default_op_size; |
| 2713 |
if (!x86_push(cpu, cpu->cd.x86.rflags, mode)) { |
| 2714 |
fatal("TODO: how to handle this 1 asdf\n"); |
| 2715 |
cpu->running = 0; |
| 2716 |
} |
| 2717 |
if (!x86_push(cpu, old_cs, mode)) { |
| 2718 |
fatal("TODO: how to handle this 2 sdghser\n"); |
| 2719 |
cpu->running = 0; |
| 2720 |
} |
| 2721 |
if (!x86_push(cpu, cpu->pc, mode)) { |
| 2722 |
fatal("TODO: how to handle this 3 we\n"); |
| 2723 |
cpu->running = 0; |
| 2724 |
} |
| 2725 |
|
| 2726 |
/* Push error code for some exceptions: */ |
| 2727 |
if ((nr >= 8 && nr <=14) || nr == 17) { |
| 2728 |
if (!x86_push(cpu, errcode, mode)) { |
| 2729 |
fatal("x86_interrupt(): TODO: asdgblah\n"); |
| 2730 |
cpu->running = 0; |
| 2731 |
} |
| 2732 |
} |
| 2733 |
|
| 2734 |
/* Only turn off interrupts for Interrupt Gates: */ |
| 2735 |
if (int_type == INT_TYPE_INTGATE) |
| 2736 |
cpu->cd.x86.rflags &= ~X86_FLAGS_IF; |
| 2737 |
|
| 2738 |
/* Turn off TF for Interrupt and Trap Gates: */ |
| 2739 |
if (int_type == INT_TYPE_INTGATE || |
| 2740 |
int_type == INT_TYPE_TRAPGATE) |
| 2741 |
cpu->cd.x86.rflags &= ~X86_FLAGS_TF; |
| 2742 |
|
| 2743 |
goto int_jump; |
| 2744 |
} |
| 2745 |
|
| 2746 |
/* |
| 2747 |
* Real mode: |
| 2748 |
*/ |
| 2749 |
if (nr * 4 > cpu->cd.x86.idtr_limit) { |
| 2750 |
fatal("TODO: real mode int 0x%02x outside idtr limit (" |
| 2751 |
"%i)?\n", nr, (int)cpu->cd.x86.idtr_limit); |
| 2752 |
cpu->running = 0; |
| 2753 |
return 0; |
| 2754 |
} |
| 2755 |
/* Read the interrupt vector: */ |
| 2756 |
res = cpu->memory_rw(cpu, cpu->mem, cpu->cd.x86.idtr + nr*4, buf, 4, |
| 2757 |
MEM_READ, NO_SEGMENTATION); |
| 2758 |
if (!res) { |
| 2759 |
fatal("x86_interrupt(): could not read the" |
| 2760 |
" interrupt descriptor table\n"); |
| 2761 |
cpu->running = 0; |
| 2762 |
return 0; |
| 2763 |
} |
| 2764 |
ofs = buf[0] + (buf[1] << 8); seg = buf[2] + (buf[3] << 8); |
| 2765 |
|
| 2766 |
reload_segment_descriptor(cpu, X86_S_CS, seg, &cpu->pc); |
| 2767 |
|
| 2768 |
/* Push old flags, old cs, and old ip (pc): */ |
| 2769 |
mode = cpu->cd.x86.descr_cache[X86_S_CS].default_op_size; |
| 2770 |
|
| 2771 |
if (!x86_push(cpu, cpu->cd.x86.rflags, mode)) { |
| 2772 |
fatal("x86_interrupt(): TODO: how to handle this 4\n"); |
| 2773 |
cpu->running = 0; |
| 2774 |
} |
| 2775 |
if (!x86_push(cpu, old_cs, mode)) { |
| 2776 |
fatal("x86_interrupt(): TODO: how to handle this 5\n"); |
| 2777 |
cpu->running = 0; |
| 2778 |
} |
| 2779 |
if (!x86_push(cpu, cpu->pc, mode)) { |
| 2780 |
fatal("x86_interrupt(): TODO: how to handle this 6\n"); |
| 2781 |
cpu->running = 0; |
| 2782 |
} |
| 2783 |
|
| 2784 |
/* Turn off interrupts and the Trap Flag, and jump to the interrupt |
| 2785 |
handler: */ |
| 2786 |
cpu->cd.x86.rflags &= ~(X86_FLAGS_IF | X86_FLAGS_TF); |
| 2787 |
|
| 2788 |
int_jump: |
| 2789 |
cpu->pc = ofs; |
| 2790 |
|
| 2791 |
return 1; |
| 2792 |
} |
| 2793 |
|
| 2794 |
|
| 2795 |
#define CALCFLAGS_OP_ADD 1 |
| 2796 |
#define CALCFLAGS_OP_SUB 2 |
| 2797 |
#define CALCFLAGS_OP_XOR 3 |
| 2798 |
/* |
| 2799 |
* x86_calc_flags(): |
| 2800 |
*/ |
| 2801 |
static void x86_calc_flags(struct cpu *cpu, uint64_t a, uint64_t b, int mode, |
| 2802 |
int op) |
| 2803 |
{ |
| 2804 |
uint64_t c=0, mask; |
| 2805 |
int i, count; |
| 2806 |
|
| 2807 |
if (mode == 8) |
| 2808 |
mask = 0xff; |
| 2809 |
else if (mode == 16) |
| 2810 |
mask = 0xffff; |
| 2811 |
else if (mode == 32) |
| 2812 |
mask = 0xffffffffULL; |
| 2813 |
else if (mode == 64) |
| 2814 |
mask = 0xffffffffffffffffULL; |
| 2815 |
else { |
| 2816 |
fatal("x86_calc_flags(): Bad mode (%i)\n", mode); |
| 2817 |
return; |
| 2818 |
} |
| 2819 |
|
| 2820 |
a &= mask; |
| 2821 |
b &= mask; |
| 2822 |
|
| 2823 |
/* CF: */ |
| 2824 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 2825 |
switch (op) { |
| 2826 |
case CALCFLAGS_OP_ADD: |
| 2827 |
if (((a + b)&mask) < a && ((a + b)&mask) < b) |
| 2828 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 2829 |
break; |
| 2830 |
case CALCFLAGS_OP_SUB: |
| 2831 |
if (a < b) |
| 2832 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 2833 |
break; |
| 2834 |
case CALCFLAGS_OP_XOR: |
| 2835 |
break; |
| 2836 |
} |
| 2837 |
|
| 2838 |
switch (op) { |
| 2839 |
case CALCFLAGS_OP_ADD: |
| 2840 |
c = (a + b) & mask; |
| 2841 |
break; |
| 2842 |
case CALCFLAGS_OP_SUB: |
| 2843 |
c = (a - b) & mask; |
| 2844 |
break; |
| 2845 |
case CALCFLAGS_OP_XOR: |
| 2846 |
c = a; |
| 2847 |
} |
| 2848 |
|
| 2849 |
/* ZF: */ |
| 2850 |
cpu->cd.x86.rflags &= ~X86_FLAGS_ZF; |
| 2851 |
if (c == 0) |
| 2852 |
cpu->cd.x86.rflags |= X86_FLAGS_ZF; |
| 2853 |
|
| 2854 |
/* SF: */ |
| 2855 |
cpu->cd.x86.rflags &= ~X86_FLAGS_SF; |
| 2856 |
if ((mode == 8 && (c & 0x80)) || |
| 2857 |
(mode == 16 && (c & 0x8000)) || |
| 2858 |
(mode == 32 && (c & 0x80000000ULL)) || |
| 2859 |
(mode == 64 && (c & 0x8000000000000000ULL))) { |
| 2860 |
cpu->cd.x86.rflags |= X86_FLAGS_SF; |
| 2861 |
} |
| 2862 |
|
| 2863 |
/* OF: */ |
| 2864 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 2865 |
switch (op) { |
| 2866 |
case CALCFLAGS_OP_ADD: |
| 2867 |
/* TODO */ |
| 2868 |
break; |
| 2869 |
case CALCFLAGS_OP_SUB: |
| 2870 |
if (cpu->cd.x86.rflags & X86_FLAGS_SF) |
| 2871 |
cpu->cd.x86.rflags |= X86_FLAGS_OF; |
| 2872 |
if (mode == 8 && (int8_t)a < (int8_t)b) |
| 2873 |
cpu->cd.x86.rflags ^= X86_FLAGS_OF; |
| 2874 |
if (mode == 16 && (int16_t)a < (int16_t)b) |
| 2875 |
cpu->cd.x86.rflags ^= X86_FLAGS_OF; |
| 2876 |
if (mode == 32 && (int32_t)a < (int32_t)b) |
| 2877 |
cpu->cd.x86.rflags ^= X86_FLAGS_OF; |
| 2878 |
break; |
| 2879 |
case CALCFLAGS_OP_XOR: |
| 2880 |
; |
| 2881 |
} |
| 2882 |
|
| 2883 |
/* AF: */ |
| 2884 |
switch (op) { |
| 2885 |
case CALCFLAGS_OP_ADD: |
| 2886 |
if ((a & 0xf) + (b & 0xf) > 15) |
| 2887 |
cpu->cd.x86.rflags |= X86_FLAGS_AF; |
| 2888 |
else |
| 2889 |
cpu->cd.x86.rflags &= ~X86_FLAGS_AF; |
| 2890 |
break; |
| 2891 |
case CALCFLAGS_OP_SUB: |
| 2892 |
if ((b & 0xf) > (a & 0xf)) |
| 2893 |
cpu->cd.x86.rflags |= X86_FLAGS_AF; |
| 2894 |
else |
| 2895 |
cpu->cd.x86.rflags &= ~X86_FLAGS_AF; |
| 2896 |
break; |
| 2897 |
case CALCFLAGS_OP_XOR: |
| 2898 |
; |
| 2899 |
} |
| 2900 |
|
| 2901 |
/* PF: (NOTE: Only the lowest 8 bits) */ |
| 2902 |
cpu->cd.x86.rflags &= ~X86_FLAGS_PF; |
| 2903 |
count = 0; |
| 2904 |
for (i=0; i<8; i++) { |
| 2905 |
if (c & 1) |
| 2906 |
count ++; |
| 2907 |
c >>= 1; |
| 2908 |
} |
| 2909 |
if (!(count&1)) |
| 2910 |
cpu->cd.x86.rflags |= X86_FLAGS_PF; |
| 2911 |
} |
| 2912 |
|
| 2913 |
|
| 2914 |
/* |
| 2915 |
* x86_condition(): |
| 2916 |
* |
| 2917 |
* Returns 0 or 1 (false or true) depending on flag bits. |
| 2918 |
*/ |
| 2919 |
static int x86_condition(struct cpu *cpu, int op) |
| 2920 |
{ |
| 2921 |
int success = 0; |
| 2922 |
|
| 2923 |
switch (op & 0xe) { |
| 2924 |
case 0x00: /* o */ |
| 2925 |
success = cpu->cd.x86.rflags & X86_FLAGS_OF; |
| 2926 |
break; |
| 2927 |
case 0x02: /* c */ |
| 2928 |
success = cpu->cd.x86.rflags & X86_FLAGS_CF; |
| 2929 |
break; |
| 2930 |
case 0x04: /* z */ |
| 2931 |
success = cpu->cd.x86.rflags & X86_FLAGS_ZF; |
| 2932 |
break; |
| 2933 |
case 0x06: /* be */ |
| 2934 |
success = (cpu->cd.x86.rflags & X86_FLAGS_ZF) || |
| 2935 |
(cpu->cd.x86.rflags & X86_FLAGS_CF); |
| 2936 |
break; |
| 2937 |
case 0x08: /* s */ |
| 2938 |
success = cpu->cd.x86.rflags & X86_FLAGS_SF; |
| 2939 |
break; |
| 2940 |
case 0x0a: /* p */ |
| 2941 |
success = cpu->cd.x86.rflags & X86_FLAGS_PF; |
| 2942 |
break; |
| 2943 |
case 0x0c: /* nge */ |
| 2944 |
success = (cpu->cd.x86.rflags & X86_FLAGS_SF? 1 : 0) |
| 2945 |
!= (cpu->cd.x86.rflags & X86_FLAGS_OF? 1 : 0); |
| 2946 |
break; |
| 2947 |
case 0x0e: /* ng */ |
| 2948 |
success = (cpu->cd.x86.rflags & X86_FLAGS_SF? 1 : 0) |
| 2949 |
!= (cpu->cd.x86.rflags & X86_FLAGS_OF? 1 : 0); |
| 2950 |
success |= (cpu->cd.x86.rflags & X86_FLAGS_ZF ? 1 : 0); |
| 2951 |
break; |
| 2952 |
} |
| 2953 |
|
| 2954 |
if (op & 1) |
| 2955 |
success = !success; |
| 2956 |
|
| 2957 |
return success? 1 : 0; |
| 2958 |
} |
| 2959 |
|
| 2960 |
|
| 2961 |
/* |
| 2962 |
* x86_shiftrotate(): |
| 2963 |
*/ |
| 2964 |
static void x86_shiftrotate(struct cpu *cpu, uint64_t *op1p, int op, |
| 2965 |
int n, int mode) |
| 2966 |
{ |
| 2967 |
uint64_t op1 = *op1p; |
| 2968 |
int cf = -1, oldcf = 0; |
| 2969 |
|
| 2970 |
n &= 31; |
| 2971 |
if (mode != 64) |
| 2972 |
op1 &= (((uint64_t)1 << mode) - 1); |
| 2973 |
|
| 2974 |
oldcf = cpu->cd.x86.rflags & X86_FLAGS_CF? 1 : 0; |
| 2975 |
|
| 2976 |
while (n-- > 0) { |
| 2977 |
cf = 0; |
| 2978 |
|
| 2979 |
if (op & 1) { /* right */ |
| 2980 |
if (op1 & 1) |
| 2981 |
cf = 1; |
| 2982 |
} else { /* left */ |
| 2983 |
cf = (op1 & ((uint64_t)1 << (mode-1)))? 1 : 0; |
| 2984 |
} |
| 2985 |
|
| 2986 |
switch (op) { |
| 2987 |
case 0: /* rol */ |
| 2988 |
op1 = (op1 << 1) | cf; |
| 2989 |
break; |
| 2990 |
case 1: /* ror */ |
| 2991 |
op1 >>= 1; |
| 2992 |
op1 |= ((uint64_t)cf << (mode - 1)); |
| 2993 |
break; |
| 2994 |
case 2: /* rcl */ |
| 2995 |
op1 = (op1 << 1) | oldcf; |
| 2996 |
oldcf = cf; |
| 2997 |
break; |
| 2998 |
case 3: /* rcr */ |
| 2999 |
op1 >>= 1; |
| 3000 |
op1 |= ((uint64_t)oldcf << (mode - 1)); |
| 3001 |
oldcf = cf; |
| 3002 |
break; |
| 3003 |
case 4: /* shl */ |
| 3004 |
case 6: /* sal */ |
| 3005 |
op1 <<= 1; |
| 3006 |
break; |
| 3007 |
case 5: /* shr */ |
| 3008 |
op1 >>= 1; |
| 3009 |
break; |
| 3010 |
case 7: /* sar */ |
| 3011 |
op1 >>= 1; |
| 3012 |
if (mode == 8 && op1 & 0x40) |
| 3013 |
op1 |= 0x80; |
| 3014 |
if (mode == 16 && op1 & 0x4000) |
| 3015 |
op1 |= 0x8000; |
| 3016 |
if (mode == 32 && op1 & 0x40000000ULL) |
| 3017 |
op1 |= 0x80000000ULL; |
| 3018 |
break; |
| 3019 |
default: |
| 3020 |
fatal("x86_shiftrotate(): unimplemented op %i\n", op); |
| 3021 |
cpu->running = 0; |
| 3022 |
} |
| 3023 |
if (mode != 64) |
| 3024 |
op1 &= (((uint64_t)1 << mode) - 1); |
| 3025 |
x86_calc_flags(cpu, op1, 0, mode, CALCFLAGS_OP_XOR); |
| 3026 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3027 |
if (cf) |
| 3028 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 3029 |
} |
| 3030 |
|
| 3031 |
/* TODO: OF flag */ |
| 3032 |
|
| 3033 |
*op1p = op1; |
| 3034 |
} |
| 3035 |
|
| 3036 |
|
| 3037 |
/* |
| 3038 |
* x86_msr(): |
| 3039 |
* |
| 3040 |
* This function reads or writes the MSRs (Model Specific Registers). |
| 3041 |
*/ |
| 3042 |
static void x86_msr(struct cpu *cpu, int writeflag) |
| 3043 |
{ |
| 3044 |
uint32_t regnr = cpu->cd.x86.r[X86_R_CX] & 0xffffffff; |
| 3045 |
uint64_t odata=0, idata = (cpu->cd.x86.r[X86_R_AX] & 0xffffffff) + |
| 3046 |
((cpu->cd.x86.r[X86_R_DX] & 0xffffffff) << 32); |
| 3047 |
|
| 3048 |
switch (regnr) { |
| 3049 |
case 0xc0000080: /* AMD64 EFER */ |
| 3050 |
if (writeflag) { |
| 3051 |
if (cpu->cd.x86.efer & X86_EFER_LME && |
| 3052 |
!(idata & X86_EFER_LME)) |
| 3053 |
debug("[ switching FROM 64-bit mode ]\n"); |
| 3054 |
if (!(cpu->cd.x86.efer & X86_EFER_LME) && |
| 3055 |
idata & X86_EFER_LME) |
| 3056 |
debug("[ switching to 64-bit mode ]\n"); |
| 3057 |
cpu->cd.x86.efer = idata; |
| 3058 |
} else |
| 3059 |
odata = cpu->cd.x86.efer; |
| 3060 |
break; |
| 3061 |
default:fatal("x86_msr: unimplemented MSR 0x%08x\n", (int)regnr); |
| 3062 |
cpu->running = 0; |
| 3063 |
} |
| 3064 |
|
| 3065 |
if (!writeflag) { |
| 3066 |
cpu->cd.x86.r[X86_R_AX] = odata & 0xffffffff; |
| 3067 |
cpu->cd.x86.r[X86_R_DX] = (odata >> 32) & 0xffffffff; |
| 3068 |
} |
| 3069 |
} |
| 3070 |
|
| 3071 |
|
| 3072 |
/* |
| 3073 |
* cause_interrupt(): |
| 3074 |
* |
| 3075 |
* Read the registers of PIC1 (and possibly PIC2) to find out which interrupt |
| 3076 |
* has occured. |
| 3077 |
* |
| 3078 |
* Returns 1 if an interrupt happened, 0 otherwise (for example if the |
| 3079 |
* in-service bit of an interrupt was already set). |
| 3080 |
*/ |
| 3081 |
static int cause_interrupt(struct cpu *cpu) |
| 3082 |
{ |
| 3083 |
int i, irq_nr = -1; |
| 3084 |
|
| 3085 |
for (i=0; i<8; i++) { |
| 3086 |
if (cpu->machine->md.pc.pic1->irr & |
| 3087 |
(~cpu->machine->md.pc.pic1->ier) & (1 << i)) |
| 3088 |
irq_nr = i; |
| 3089 |
} |
| 3090 |
|
| 3091 |
if (irq_nr == 2) { |
| 3092 |
for (i=0; i<8; i++) { |
| 3093 |
if (cpu->machine->md.pc.pic2->irr & |
| 3094 |
(~cpu->machine->md.pc.pic2->ier) & (1 << i)) |
| 3095 |
irq_nr = 8+i; |
| 3096 |
} |
| 3097 |
} |
| 3098 |
|
| 3099 |
if (irq_nr == 2) { |
| 3100 |
fatal("cause_interrupt(): Huh? irq 2 but no secondary irq\n"); |
| 3101 |
cpu->running = 0; |
| 3102 |
} |
| 3103 |
|
| 3104 |
/* |
| 3105 |
* TODO: How about multiple interrupt levels? |
| 3106 |
*/ |
| 3107 |
|
| 3108 |
#if 0 |
| 3109 |
printf("cause1: %i (irr1=%02x ier1=%02x, irr2=%02x ier2=%02x\n", irq_nr, |
| 3110 |
cpu->machine->md.pc.pic1->irr, cpu->machine->md.pc.pic1->ier, |
| 3111 |
cpu->machine->md.pc.pic2->irr, cpu->machine->md.pc.pic2->ier); |
| 3112 |
#endif |
| 3113 |
|
| 3114 |
/* Set the in-service bit, and calculate actual INT nr: */ |
| 3115 |
if (irq_nr < 8) { |
| 3116 |
if (cpu->machine->md.pc.pic1->isr & (1 << irq_nr)) |
| 3117 |
return 0; |
| 3118 |
cpu->machine->md.pc.pic1->isr |= (1 << irq_nr); |
| 3119 |
irq_nr = cpu->machine->md.pc.pic1->irq_base + irq_nr; |
| 3120 |
} else { |
| 3121 |
if (cpu->machine->md.pc.pic2->isr & (1 << (irq_nr & 7))) |
| 3122 |
return 0; |
| 3123 |
cpu->machine->md.pc.pic2->isr |= (1 << (irq_nr&7)); |
| 3124 |
irq_nr = cpu->machine->md.pc.pic2->irq_base + (irq_nr & 7); |
| 3125 |
} |
| 3126 |
|
| 3127 |
/* printf("cause2: %i\n", irq_nr); */ |
| 3128 |
|
| 3129 |
x86_interrupt(cpu, irq_nr, 0); |
| 3130 |
cpu->cd.x86.halted = 0; |
| 3131 |
return 1; |
| 3132 |
} |
| 3133 |
|
| 3134 |
|
| 3135 |
/* |
| 3136 |
* x86_cpu_run_instr(): |
| 3137 |
* |
| 3138 |
* Execute one instruction on a specific CPU. |
| 3139 |
* |
| 3140 |
* Return value is the number of instructions executed during this call, |
| 3141 |
* 0 if no instruction was executed. |
| 3142 |
*/ |
| 3143 |
int x86_cpu_run_instr(struct emul *emul, struct cpu *cpu) |
| 3144 |
{ |
| 3145 |
int i, r, rep = 0, op, len, mode, omode, mode67; |
| 3146 |
int nprefixbytes = 0, success, longmode; |
| 3147 |
uint32_t imm, imm2; |
| 3148 |
unsigned char buf[16]; |
| 3149 |
unsigned char *instr = buf, *instr_orig, *really_orig_instr; |
| 3150 |
uint64_t newpc = cpu->pc; |
| 3151 |
uint64_t tmp, op1, op2; |
| 3152 |
int trap_flag_was_set = cpu->cd.x86.rflags & X86_FLAGS_TF; |
| 3153 |
|
| 3154 |
/* Check PC against breakpoints: */ |
| 3155 |
if (!single_step) |
| 3156 |
for (i=0; i<cpu->machine->n_breakpoints; i++) |
| 3157 |
if (cpu->pc == cpu->machine->breakpoint_addr[i]) { |
| 3158 |
fatal("Breakpoint reached, 0x%04x:0x%llx\n", |
| 3159 |
cpu->cd.x86.s[X86_S_CS], |
| 3160 |
(long long)cpu->pc); |
| 3161 |
single_step = 1; |
| 3162 |
return 0; |
| 3163 |
} |
| 3164 |
|
| 3165 |
if (!cpu->cd.x86.descr_cache[X86_S_CS].valid) { |
| 3166 |
fatal("x86_cpu_run_instr(): Invalid CS descriptor?\n"); |
| 3167 |
cpu->running = 0; |
| 3168 |
return 0; |
| 3169 |
} |
| 3170 |
|
| 3171 |
longmode = cpu->cd.x86.efer & X86_EFER_LME; |
| 3172 |
mode = cpu->cd.x86.descr_cache[X86_S_CS].default_op_size; |
| 3173 |
omode = mode; |
| 3174 |
if (mode != 16 && mode != 32) { |
| 3175 |
fatal("x86_cpu_run_instr(): Invalid CS default op size, %i\n", |
| 3176 |
mode); |
| 3177 |
cpu->running = 0; |
| 3178 |
return 0; |
| 3179 |
} |
| 3180 |
|
| 3181 |
if (cpu->cd.x86.interrupt_asserted && |
| 3182 |
cpu->cd.x86.rflags & X86_FLAGS_IF) { |
| 3183 |
if (cause_interrupt(cpu)) |
| 3184 |
return 0; |
| 3185 |
} |
| 3186 |
|
| 3187 |
/* 16-bit BIOS emulation: */ |
| 3188 |
if (mode == 16 && ((newpc + (cpu->cd.x86.s[X86_S_CS] << 4)) & 0xff000) |
| 3189 |
== 0xf8000 && cpu->machine->prom_emulation) { |
| 3190 |
int addr = (newpc + (cpu->cd.x86.s[X86_S_CS] << 4)) & 0xfff; |
| 3191 |
if (cpu->machine->instruction_trace) |
| 3192 |
debug("(PC BIOS emulation, int 0x%02x)\n", |
| 3193 |
addr >> 4); |
| 3194 |
pc_bios_emul(cpu); |
| 3195 |
/* Approximately equivalent to 500 instructions. */ |
| 3196 |
return 500; |
| 3197 |
} |
| 3198 |
|
| 3199 |
if (cpu->cd.x86.halted) { |
| 3200 |
if (!(cpu->cd.x86.rflags & X86_FLAGS_IF)) { |
| 3201 |
fatal("[ Halting with interrupts disabled. ]\n"); |
| 3202 |
cpu->running = 0; |
| 3203 |
} |
| 3204 |
/* Treating this as more than one instruction makes us |
| 3205 |
wait less for devices. */ |
| 3206 |
return 1000; |
| 3207 |
} |
| 3208 |
|
| 3209 |
/* Read an instruction from memory: */ |
| 3210 |
cpu->cd.x86.cursegment = X86_S_CS; |
| 3211 |
cpu->cd.x86.seg_override = 0; |
| 3212 |
|
| 3213 |
r = cpu->memory_rw(cpu, cpu->mem, cpu->pc, &buf[0], sizeof(buf), |
| 3214 |
MEM_READ, CACHE_INSTRUCTION); |
| 3215 |
if (!r) { |
| 3216 |
/* This could happen if, for example, there was an |
| 3217 |
exception while we tried to read the instruction. */ |
| 3218 |
return 0; |
| 3219 |
} |
| 3220 |
|
| 3221 |
really_orig_instr = instr; /* Used to display an error message |
| 3222 |
for unimplemented instructions. */ |
| 3223 |
|
| 3224 |
if (cpu->machine->instruction_trace) |
| 3225 |
x86_cpu_disassemble_instr(cpu, instr, 1 | omode, 0, 0); |
| 3226 |
|
| 3227 |
/* For debugging: */ |
| 3228 |
if (instr[0] == 0 && instr[1] == 0 && instr[2] == 0 && instr[3] == 0) { |
| 3229 |
fatal("WARNING: Running in nothingness?\n"); |
| 3230 |
cpu->running = 0; |
| 3231 |
return 0; |
| 3232 |
} |
| 3233 |
|
| 3234 |
/* All instructions are at least one byte long :-) */ |
| 3235 |
newpc ++; |
| 3236 |
|
| 3237 |
/* Default is to use the data segment, or the stack segment: */ |
| 3238 |
cpu->cd.x86.cursegment = X86_S_DS; |
| 3239 |
mode67 = mode; |
| 3240 |
|
| 3241 |
/* Any prefix? */ |
| 3242 |
for (;;) { |
| 3243 |
if (longmode && (instr[0] & 0xf0) == 0x40) { |
| 3244 |
fatal("TODO: REX byte 0x%02x\n", instr[0]); |
| 3245 |
cpu->running = 0; |
| 3246 |
} else if (instr[0] == 0x66) { |
| 3247 |
if (mode == 16) |
| 3248 |
mode = 32; |
| 3249 |
else |
| 3250 |
mode = 16; |
| 3251 |
} else if (instr[0] == 0x67) { |
| 3252 |
if (mode67 == 16) |
| 3253 |
mode67 = 32; |
| 3254 |
else |
| 3255 |
mode67 = 16; |
| 3256 |
} else if (instr[0] == 0x26) { |
| 3257 |
cpu->cd.x86.cursegment = X86_S_ES; |
| 3258 |
cpu->cd.x86.seg_override = 1; |
| 3259 |
} else if (instr[0] == 0x2e) { |
| 3260 |
cpu->cd.x86.cursegment = X86_S_CS; |
| 3261 |
cpu->cd.x86.seg_override = 1; |
| 3262 |
} else if (instr[0] == 0x36) { |
| 3263 |
cpu->cd.x86.cursegment = X86_S_SS; |
| 3264 |
cpu->cd.x86.seg_override = 1; |
| 3265 |
} else if (instr[0] == 0x3e) { |
| 3266 |
cpu->cd.x86.cursegment = X86_S_DS; |
| 3267 |
cpu->cd.x86.seg_override = 1; |
| 3268 |
} else if (instr[0] == 0x64) { |
| 3269 |
cpu->cd.x86.cursegment = X86_S_FS; |
| 3270 |
cpu->cd.x86.seg_override = 1; |
| 3271 |
} else if (instr[0] == 0x65) { |
| 3272 |
cpu->cd.x86.cursegment = X86_S_GS; |
| 3273 |
cpu->cd.x86.seg_override = 1; |
| 3274 |
} else if (instr[0] == 0xf0) { |
| 3275 |
/* lock */ |
| 3276 |
} else if (instr[0] == 0xf2) { |
| 3277 |
rep = REP_REPNE; |
| 3278 |
} else if (instr[0] == 0xf3) { |
| 3279 |
rep = REP_REP; |
| 3280 |
} else |
| 3281 |
break; |
| 3282 |
instr ++; |
| 3283 |
newpc ++; |
| 3284 |
if (++nprefixbytes > 4) { |
| 3285 |
fatal("x86: too many prefix bytes at "); |
| 3286 |
print_csip(cpu); fatal("\n"); |
| 3287 |
cpu->running = 0; |
| 3288 |
return 0; |
| 3289 |
} |
| 3290 |
} |
| 3291 |
|
| 3292 |
op = instr[0]; |
| 3293 |
instr ++; |
| 3294 |
|
| 3295 |
if ((op & 0xf0) <= 0x30 && (op & 7) <= 5) { |
| 3296 |
success = 1; |
| 3297 |
instr_orig = instr; |
| 3298 |
switch (op & 7) { |
| 3299 |
case 4: imm = read_imm(&instr, &newpc, 8); |
| 3300 |
op1 = cpu->cd.x86.r[X86_R_AX] & 0xff; |
| 3301 |
op2 = (signed char)imm; |
| 3302 |
mode = 8; |
| 3303 |
break; |
| 3304 |
case 5: imm = read_imm(&instr, &newpc, mode); |
| 3305 |
op1 = cpu->cd.x86.r[X86_R_AX]; op2 = imm; |
| 3306 |
break; |
| 3307 |
default:success = modrm(cpu, MODRM_READ, mode, mode67, |
| 3308 |
op&1? 0 : MODRM_EIGHTBIT, &instr, &newpc,&op1,&op2); |
| 3309 |
if (!success) |
| 3310 |
return 0; |
| 3311 |
} |
| 3312 |
|
| 3313 |
if ((op & 6) == 2) { |
| 3314 |
uint64_t tmp = op1; op1 = op2; op2 = tmp; |
| 3315 |
} |
| 3316 |
|
| 3317 |
/* printf("op1=0x%x op2=0x%x => ", (int)op1, (int)op2); */ |
| 3318 |
|
| 3319 |
switch (mode) { |
| 3320 |
case 16: op1 &= 0xffff; op2 &= 0xffff; break; |
| 3321 |
case 32: op1 &= 0xffffffffULL; op2 &= 0xffffffffULL; break; |
| 3322 |
} |
| 3323 |
|
| 3324 |
switch (op & 0x38) { |
| 3325 |
case 0x00: x86_calc_flags(cpu, op1, op2, !(op & 1)? 8 : |
| 3326 |
mode, CALCFLAGS_OP_ADD); |
| 3327 |
op1 = op1 + op2; |
| 3328 |
break; |
| 3329 |
case 0x08: op1 = op1 | op2; break; |
| 3330 |
case 0x10: tmp = op2; |
| 3331 |
if (cpu->cd.x86.rflags & X86_FLAGS_CF) |
| 3332 |
tmp ++; |
| 3333 |
x86_calc_flags(cpu, op1, tmp, !(op & 1)? 8 : |
| 3334 |
mode, CALCFLAGS_OP_ADD); |
| 3335 |
op1 = op1 + tmp; |
| 3336 |
break; |
| 3337 |
case 0x18: tmp = op2; |
| 3338 |
if (cpu->cd.x86.rflags & X86_FLAGS_CF) |
| 3339 |
tmp ++; |
| 3340 |
x86_calc_flags(cpu, op1, tmp, !(op & 1)? 8 : |
| 3341 |
mode, CALCFLAGS_OP_SUB); |
| 3342 |
op1 = op1 - tmp; |
| 3343 |
break; |
| 3344 |
case 0x20: op1 = op1 & op2; break; |
| 3345 |
case 0x28: x86_calc_flags(cpu, op1, op2, !(op & 1)? 8 : |
| 3346 |
mode, CALCFLAGS_OP_SUB); |
| 3347 |
op1 = op1 - op2; break; |
| 3348 |
case 0x30: op1 = op1 ^ op2; break; |
| 3349 |
case 0x38: x86_calc_flags(cpu, op1, op2, !(op & 1)? 8 : |
| 3350 |
mode, CALCFLAGS_OP_SUB); |
| 3351 |
break; |
| 3352 |
default: |
| 3353 |
fatal("not yet\n"); |
| 3354 |
exit(1); |
| 3355 |
} |
| 3356 |
|
| 3357 |
switch (mode) { |
| 3358 |
case 16: op1 &= 0xffff; op2 &= 0xffff; break; |
| 3359 |
case 32: op1 &= 0xffffffffULL; op2 &= 0xffffffffULL; break; |
| 3360 |
} |
| 3361 |
|
| 3362 |
/* NOTE: Manual cmp for "sbb, "sub" and "cmp" instructions. */ |
| 3363 |
if ((op & 0x38) != 0x38 && (op & 0x38) != 0x28 && |
| 3364 |
(op & 0x38) != 0x18 && (op & 0x38) != 0x00 && |
| 3365 |
(op & 0x38) != 0x10) |
| 3366 |
x86_calc_flags(cpu, op1, 0, !(op & 1)? 8 : mode, |
| 3367 |
CALCFLAGS_OP_XOR); |
| 3368 |
|
| 3369 |
/* "and","or","xor" always clears CF and OF: */ |
| 3370 |
if ((op & 0x38) == 0x08 || (op & 0x38) == 0x20 || |
| 3371 |
(op & 0x38) == 0x30) { |
| 3372 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3373 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 3374 |
} |
| 3375 |
|
| 3376 |
/* printf("op1=0x%x op2=0x%x\n", (int)op1, (int)op2); */ |
| 3377 |
|
| 3378 |
if ((op & 6) == 2) { |
| 3379 |
uint64_t tmp = op1; op1 = op2; op2 = tmp; |
| 3380 |
} |
| 3381 |
|
| 3382 |
/* Write back the result: (for all cases except CMP) */ |
| 3383 |
if ((op & 0x38) != 0x38) { |
| 3384 |
switch (op & 7) { |
| 3385 |
case 4: cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[ |
| 3386 |
X86_R_AX] & ~0xff) | (op1 & 0xff); |
| 3387 |
break; |
| 3388 |
case 5: cpu->cd.x86.r[X86_R_AX] = modify(cpu-> |
| 3389 |
cd.x86.r[X86_R_AX], op1); |
| 3390 |
break; |
| 3391 |
default:success = modrm(cpu, (op & 6) == 2? |
| 3392 |
MODRM_WRITE_R : MODRM_WRITE_RM, mode, |
| 3393 |
mode67, op&1? 0 : MODRM_EIGHTBIT, |
| 3394 |
&instr_orig, NULL, &op1, &op2); |
| 3395 |
if (!success) |
| 3396 |
return 0; |
| 3397 |
} |
| 3398 |
} |
| 3399 |
} else if ((op & 0xf0) < 0x20 && (op & 7) == 6) { |
| 3400 |
success = x86_push(cpu, cpu->cd.x86.s[op / 8], mode); |
| 3401 |
if (!success) |
| 3402 |
return 0; |
| 3403 |
} else if (op == 0x0f && cpu->cd.x86.model.model_number == |
| 3404 |
X86_MODEL_8086) { |
| 3405 |
uint64_t tmp; |
| 3406 |
fatal("WARNING: pop cs\n"); |
| 3407 |
if (!x86_pop(cpu, &tmp, mode)) |
| 3408 |
return 0; |
| 3409 |
reload_segment_descriptor(cpu, X86_S_CS, tmp, &newpc); |
| 3410 |
} else if (op == 0x0f) { |
| 3411 |
uint64_t tmp; |
| 3412 |
unsigned char *instr_orig_2; |
| 3413 |
int signflag, i; |
| 3414 |
imm = read_imm(&instr, &newpc, 8); |
| 3415 |
if (imm >= 0x40 && imm <= 0x4f) { /* CMOVxx */ |
| 3416 |
op = imm & 0xf; |
| 3417 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3418 |
0, &instr, &newpc, &op1, &op2)) |
| 3419 |
return 0; |
| 3420 |
success = x86_condition(cpu, op); |
| 3421 |
if (success) { |
| 3422 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3423 |
MODRM_EIGHTBIT, &instr_orig, NULL, |
| 3424 |
&op2, &op1)) |
| 3425 |
return 0; |
| 3426 |
} |
| 3427 |
} else if (imm >= 0x80 && imm <= 0x8f) { |
| 3428 |
/* conditional near jump */ |
| 3429 |
op = imm & 0xf; |
| 3430 |
imm = read_imm(&instr, &newpc, mode); |
| 3431 |
success = x86_condition(cpu, op); |
| 3432 |
if (success) |
| 3433 |
newpc += imm; |
| 3434 |
} else if (imm >= 0x90 && imm <= 0x9f) { |
| 3435 |
instr_orig = instr; |
| 3436 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3437 |
MODRM_EIGHTBIT, &instr, &newpc, &op1, &op2)) |
| 3438 |
return 0; |
| 3439 |
op1 = x86_condition(cpu, imm & 0xf); |
| 3440 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 3441 |
MODRM_EIGHTBIT, &instr_orig, NULL, &op1, &op2)) |
| 3442 |
return 0; |
| 3443 |
} else { |
| 3444 |
int subop; |
| 3445 |
switch (imm) { |
| 3446 |
case 0x00: |
| 3447 |
subop = (*instr >> 3) & 0x7; |
| 3448 |
switch (subop) { |
| 3449 |
case 1: /* str */ |
| 3450 |
/* TODO: Check Prot.mode? */ |
| 3451 |
op1 = cpu->cd.x86.tr; |
| 3452 |
if (!modrm(cpu, MODRM_WRITE_RM, 16, |
| 3453 |
mode67, 0, &instr, &newpc, &op1, |
| 3454 |
&op2)) |
| 3455 |
return 0; |
| 3456 |
break; |
| 3457 |
case 2: /* lldt */ |
| 3458 |
/* TODO: Check cpl? and Prot.mode */ |
| 3459 |
if (!modrm(cpu, MODRM_READ, 16, mode67, |
| 3460 |
0, &instr, &newpc, &op1, &op2)) |
| 3461 |
return 0; |
| 3462 |
reload_segment_descriptor(cpu, |
| 3463 |
RELOAD_LDTR, op1, &newpc); |
| 3464 |
break; |
| 3465 |
case 3: /* ltr */ |
| 3466 |
/* TODO: Check cpl=0 and Prot.mode */ |
| 3467 |
if (!modrm(cpu, MODRM_READ, 16, mode67, |
| 3468 |
0, &instr, &newpc, &op1, &op2)) |
| 3469 |
return 0; |
| 3470 |
reload_segment_descriptor(cpu, |
| 3471 |
RELOAD_TR, op1, &newpc); |
| 3472 |
break; |
| 3473 |
default:fatal("UNIMPLEMENTED 0x%02x,0x%02x" |
| 3474 |
",0x%02x\n", op, imm, *instr); |
| 3475 |
quiet_mode = 0; |
| 3476 |
x86_cpu_disassemble_instr(cpu, |
| 3477 |
really_orig_instr, 1 | omode, 0, 0); |
| 3478 |
cpu->running = 0; |
| 3479 |
} |
| 3480 |
break; |
| 3481 |
case 0x01: |
| 3482 |
subop = (*instr >> 3) & 0x7; |
| 3483 |
switch (subop) { |
| 3484 |
case 0: /* sgdt */ |
| 3485 |
case 1: /* sidt */ |
| 3486 |
case 2: /* lgdt */ |
| 3487 |
case 3: /* lidt */ |
| 3488 |
instr_orig = instr; |
| 3489 |
if (!modrm(cpu, MODRM_READ, mode, |
| 3490 |
mode67, MODRM_JUST_GET_ADDR, &instr, |
| 3491 |
&newpc, &op1, &op2)) |
| 3492 |
return 0; |
| 3493 |
/* TODO/NOTE: how about errors? */ |
| 3494 |
if (subop >= 2) { |
| 3495 |
x86_load(cpu, op1, &tmp, 2); |
| 3496 |
x86_load(cpu, op1 + 2, &op2, 4); |
| 3497 |
if (mode == 16) |
| 3498 |
op2 &= 0x00ffffffULL; |
| 3499 |
} |
| 3500 |
switch (subop) { |
| 3501 |
case 0: tmp = cpu->cd.x86.gdtr_limit; |
| 3502 |
op2 = cpu->cd.x86.gdtr; |
| 3503 |
break; |
| 3504 |
case 1: tmp = cpu->cd.x86.idtr_limit; |
| 3505 |
op2 = cpu->cd.x86.idtr; |
| 3506 |
break; |
| 3507 |
case 2: cpu->cd.x86.gdtr_limit = |
| 3508 |
tmp & 0xffff; |
| 3509 |
cpu->cd.x86.gdtr = op2; |
| 3510 |
break; |
| 3511 |
case 3: cpu->cd.x86.idtr_limit = |
| 3512 |
tmp & 0xffff; |
| 3513 |
cpu->cd.x86.idtr = op2; |
| 3514 |
break; |
| 3515 |
} |
| 3516 |
if (subop < 2) { |
| 3517 |
if (mode == 16) |
| 3518 |
op2 &= 0x00ffffffULL; |
| 3519 |
x86_store(cpu, op1, tmp, 2); |
| 3520 |
x86_store(cpu, op1+2, op2, 4); |
| 3521 |
} |
| 3522 |
break; |
| 3523 |
case 4: /* smsw */ |
| 3524 |
case 6: /* lmsw */ |
| 3525 |
instr_orig = instr; |
| 3526 |
if (!modrm(cpu, MODRM_READ, 16, mode67, |
| 3527 |
0, &instr, &newpc, &op1, &op2)) |
| 3528 |
return 0; |
| 3529 |
if (((*instr_orig >> 3) & 0x7) == 4) { |
| 3530 |
op1 = cpu->cd.x86.cr[0] &0xffff; |
| 3531 |
if (!modrm(cpu, MODRM_WRITE_RM, |
| 3532 |
16, mode67, 0, &instr_orig, |
| 3533 |
NULL, &op1, &op2)) |
| 3534 |
return 0; |
| 3535 |
} else { |
| 3536 |
/* lmsw cannot be used to |
| 3537 |
clear bit 0: */ |
| 3538 |
op1 |= (cpu->cd.x86.cr[0] & |
| 3539 |
X86_CR0_PE); |
| 3540 |
x86_write_cr(cpu, 0, |
| 3541 |
(cpu->cd.x86.cr[0] & ~0xf) |
| 3542 |
| (op1 & 0xf)); |
| 3543 |
} |
| 3544 |
break; |
| 3545 |
case 7: /* invlpg */ |
| 3546 |
modrm(cpu, MODRM_READ, mode, |
| 3547 |
mode67, MODRM_JUST_GET_ADDR, &instr, |
| 3548 |
&newpc, &op1, &op2); |
| 3549 |
/* TODO */ |
| 3550 |
break; |
| 3551 |
default:fatal("UNIMPLEMENTED 0x%02x,0x%02x" |
| 3552 |
",0x%02x\n", op, imm, *instr); |
| 3553 |
quiet_mode = 0; |
| 3554 |
x86_cpu_disassemble_instr(cpu, |
| 3555 |
really_orig_instr, 1 | omode, 0, 0); |
| 3556 |
cpu->running = 0; |
| 3557 |
} |
| 3558 |
break; |
| 3559 |
case 0x06: /* CLTS */ |
| 3560 |
cpu->cd.x86.cr[0] &= ~X86_CR0_TS; |
| 3561 |
break; |
| 3562 |
case 0x08: /* INVD */ |
| 3563 |
/* TODO */ |
| 3564 |
break; |
| 3565 |
case 0x09: /* WBINVD */ |
| 3566 |
/* TODO */ |
| 3567 |
break; |
| 3568 |
case 0x0b: /* Reserved */ |
| 3569 |
x86_interrupt(cpu, 6, 0); |
| 3570 |
return 1; |
| 3571 |
case 0x20: /* MOV r/m,CRx */ |
| 3572 |
case 0x21: /* MOV r/m,DRx: TODO: is this right? */ |
| 3573 |
instr_orig = instr; |
| 3574 |
if (!modrm(cpu, MODRM_READ, 32, mode67, |
| 3575 |
imm==0x20? MODRM_CR : MODRM_DR, &instr, |
| 3576 |
&newpc, &op1, &op2)) |
| 3577 |
return 0; |
| 3578 |
op1 = op2; |
| 3579 |
if (!modrm(cpu, MODRM_WRITE_RM, 32, mode67, |
| 3580 |
imm==0x20? MODRM_CR : MODRM_DR, &instr_orig, |
| 3581 |
NULL, &op1, &op2)) |
| 3582 |
return 0; |
| 3583 |
break; |
| 3584 |
case 0x22: /* MOV CRx,r/m */ |
| 3585 |
case 0x23: /* MOV DRx,r/m */ |
| 3586 |
instr_orig = instr; |
| 3587 |
if (!modrm(cpu, MODRM_READ, 32, mode67, |
| 3588 |
imm==0x22? MODRM_CR : MODRM_DR, &instr, |
| 3589 |
&newpc, &op1, &op2)) |
| 3590 |
return 0; |
| 3591 |
op2 = op1; |
| 3592 |
if (!modrm(cpu, MODRM_WRITE_R, 32, mode67, |
| 3593 |
imm==0x22? MODRM_CR : MODRM_DR, &instr_orig, |
| 3594 |
NULL, &op1, &op2)) |
| 3595 |
return 0; |
| 3596 |
break; |
| 3597 |
case 0x30: /* WRMSR */ |
| 3598 |
case 0x32: /* RDMSR */ |
| 3599 |
x86_msr(cpu, imm==0x30? 1 : 0); |
| 3600 |
break; |
| 3601 |
case 0x31: /* RDTSC */ |
| 3602 |
if (cpu->cd.x86.model.model_number < |
| 3603 |
X86_MODEL_PENTIUM) |
| 3604 |
fatal("WARNING: rdtsc usually requires" |
| 3605 |
" a Pentium. continuing anyway\n"); |
| 3606 |
if (cpu->cd.x86.cr[4] & X86_CR4_TSD) |
| 3607 |
fatal("WARNING: time stamp disable:" |
| 3608 |
" TODO\n"); |
| 3609 |
cpu->cd.x86.r[X86_R_DX] = cpu->cd.x86.tsc >> 32; |
| 3610 |
cpu->cd.x86.r[X86_R_AX] = cpu->cd.x86.tsc |
| 3611 |
& 0xffffffff; |
| 3612 |
/* TODO: make this better */ |
| 3613 |
cpu->cd.x86.tsc += 1000; |
| 3614 |
break; |
| 3615 |
case 0xa0: |
| 3616 |
if (!x86_push(cpu, cpu->cd.x86.s[X86_S_FS], |
| 3617 |
mode)) |
| 3618 |
return 0; |
| 3619 |
break; |
| 3620 |
case 0xa1: |
| 3621 |
if (!x86_pop(cpu, &tmp, mode)) |
| 3622 |
return 0; |
| 3623 |
reload_segment_descriptor(cpu, X86_S_FS, |
| 3624 |
tmp, &newpc); |
| 3625 |
break; |
| 3626 |
case 0xa2: |
| 3627 |
if (!(cpu->cd.x86.rflags & X86_FLAGS_ID)) |
| 3628 |
fatal("TODO: ID bit off in flags," |
| 3629 |
" but CPUID attempted?\n"); |
| 3630 |
x86_cpuid(cpu); |
| 3631 |
break; |
| 3632 |
case 0xa4: |
| 3633 |
case 0xa5: |
| 3634 |
case 0xac: |
| 3635 |
case 0xad: |
| 3636 |
instr_orig = instr; |
| 3637 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3638 |
0, &instr, &newpc, &op1, &op2)) |
| 3639 |
return 0; |
| 3640 |
if (imm & 1) |
| 3641 |
imm2 = cpu->cd.x86.r[X86_R_CX]; |
| 3642 |
else |
| 3643 |
imm2 = read_imm(&instr, &newpc, 8); |
| 3644 |
imm2 &= 31; |
| 3645 |
if (imm <= 0xa5) { /* SHLD */ |
| 3646 |
if (mode == 16) { |
| 3647 |
op1 <<= 16; |
| 3648 |
op1 |= (op2 & 0xffff); |
| 3649 |
} else { |
| 3650 |
op1 <<= 32; |
| 3651 |
op1 |= (op2 & 0xffffffff); |
| 3652 |
} |
| 3653 |
x86_shiftrotate(cpu, &op1, 4, imm2, |
| 3654 |
mode == 64? 64 : (mode * 2)); |
| 3655 |
op1 >>= (mode==16? 16 : 32); |
| 3656 |
} else { /* SHRD */ |
| 3657 |
if (mode == 16) { |
| 3658 |
op2 <<= 16; |
| 3659 |
op1 = (op1 & 0xffff) | op2; |
| 3660 |
} else { |
| 3661 |
op2 <<= 32; |
| 3662 |
op1 = (op1 & 0xffffffff) | op2; |
| 3663 |
} |
| 3664 |
x86_shiftrotate(cpu, &op1, 5, imm2, |
| 3665 |
mode == 64? 64 : (mode * 2)); |
| 3666 |
op1 &= (mode==16? 0xffff : 0xffffffff); |
| 3667 |
} |
| 3668 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 3669 |
0, &instr_orig, NULL, &op1, &op2)) |
| 3670 |
return 0; |
| 3671 |
break; |
| 3672 |
case 0xa8: |
| 3673 |
if (!x86_push(cpu, cpu->cd.x86.s[X86_S_GS], |
| 3674 |
mode)) |
| 3675 |
return 0; |
| 3676 |
break; |
| 3677 |
case 0xa9: |
| 3678 |
if (!x86_pop(cpu, &tmp, mode)) |
| 3679 |
return 0; |
| 3680 |
reload_segment_descriptor(cpu, X86_S_GS, |
| 3681 |
tmp, &newpc); |
| 3682 |
break; |
| 3683 |
case 0xa3: /* BT */ |
| 3684 |
case 0xab: /* BTS */ |
| 3685 |
case 0xb3: /* BTR */ |
| 3686 |
case 0xbb: /* BTC */ |
| 3687 |
instr_orig = instr; |
| 3688 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3689 |
0, &instr, &newpc, &op1, &op2)) |
| 3690 |
return 0; |
| 3691 |
imm2 = op2 & 31; |
| 3692 |
if (mode == 16) |
| 3693 |
imm2 &= 15; |
| 3694 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3695 |
if (op1 & ((uint64_t)1 << imm2)) |
| 3696 |
cpu->cd.x86.rflags |= |
| 3697 |
X86_FLAGS_CF; |
| 3698 |
switch (imm) { |
| 3699 |
case 0xab: |
| 3700 |
op1 |= ((uint64_t)1 << imm2); |
| 3701 |
break; |
| 3702 |
case 0xb3: |
| 3703 |
op1 &= ~((uint64_t)1 << imm2); |
| 3704 |
break; |
| 3705 |
case 0xbb: |
| 3706 |
op1 ^= ((uint64_t)1 << imm2); |
| 3707 |
break; |
| 3708 |
} |
| 3709 |
if (imm != 0xa3) { |
| 3710 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, |
| 3711 |
mode67, 0, &instr_orig, NULL, |
| 3712 |
&op1, &op2)) |
| 3713 |
return 0; |
| 3714 |
} |
| 3715 |
break; |
| 3716 |
case 0xaf: /* imul r16/32, rm16/32 */ |
| 3717 |
instr_orig = instr; |
| 3718 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3719 |
0, &instr, &newpc, &op1, &op2)) |
| 3720 |
return 0; |
| 3721 |
cpu->cd.x86.rflags &= X86_FLAGS_CF; |
| 3722 |
cpu->cd.x86.rflags &= X86_FLAGS_OF; |
| 3723 |
if (mode == 16) { |
| 3724 |
op2 = (int16_t)op1 * (int16_t)op2; |
| 3725 |
if (op2 >= 0x10000) |
| 3726 |
cpu->cd.x86.rflags |= |
| 3727 |
X86_FLAGS_CF | X86_FLAGS_OF; |
| 3728 |
} else { |
| 3729 |
op2 = (int32_t)op1 * (int32_t)op2; |
| 3730 |
if (op2 >= 0x100000000ULL) |
| 3731 |
cpu->cd.x86.rflags |= |
| 3732 |
X86_FLAGS_CF | X86_FLAGS_OF; |
| 3733 |
} |
| 3734 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3735 |
0, &instr_orig, NULL, &op1, &op2)) |
| 3736 |
return 0; |
| 3737 |
break; |
| 3738 |
case 0xb0: |
| 3739 |
case 0xb1: /* CMPXCHG */ |
| 3740 |
instr_orig = instr; |
| 3741 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3742 |
imm == 0xb0? MODRM_EIGHTBIT : 0, |
| 3743 |
&instr, &newpc, &op1, &op2)) |
| 3744 |
return 0; |
| 3745 |
x86_calc_flags(cpu, op1, cpu->cd.x86.r[ |
| 3746 |
X86_R_AX], imm == 0xb0? 8 : mode, |
| 3747 |
CALCFLAGS_OP_SUB); |
| 3748 |
if (cpu->cd.x86.rflags & X86_FLAGS_ZF) { |
| 3749 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, |
| 3750 |
mode67, imm == 0xb0? |
| 3751 |
MODRM_EIGHTBIT : 0, |
| 3752 |
&instr_orig, NULL, &op2, &op1)) |
| 3753 |
return 0; |
| 3754 |
} else { |
| 3755 |
if (imm == 0xb0) |
| 3756 |
cpu->cd.x86.r[X86_R_AX] = |
| 3757 |
(cpu->cd.x86.r[X86_R_AX] & |
| 3758 |
~0xff) | (op1 & 0xff); |
| 3759 |
else if (mode == 16) |
| 3760 |
cpu->cd.x86.r[X86_R_AX] = |
| 3761 |
(cpu->cd.x86.r[X86_R_AX] & |
| 3762 |
~0xffff) | (op1 & 0xffff); |
| 3763 |
else /* 32 bit */ |
| 3764 |
cpu->cd.x86.r[X86_R_AX] = op1; |
| 3765 |
} |
| 3766 |
break; |
| 3767 |
case 0xb2: /* LSS */ |
| 3768 |
case 0xb4: /* LFS */ |
| 3769 |
case 0xb5: /* LGS */ |
| 3770 |
instr_orig = instr; |
| 3771 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3772 |
MODRM_JUST_GET_ADDR, &instr, &newpc, |
| 3773 |
&op1, &op2)) |
| 3774 |
return 0; |
| 3775 |
/* op1 is the address to load from */ |
| 3776 |
if (!x86_load(cpu, op1, &tmp, mode/8)) |
| 3777 |
return 0; |
| 3778 |
op2 = tmp; |
| 3779 |
if (!x86_load(cpu, op1 + mode/8, &tmp, 2)) |
| 3780 |
return 0; |
| 3781 |
reload_segment_descriptor(cpu, imm==0xb2? |
| 3782 |
X86_S_SS:(imm==0xb4?X86_S_FS:X86_S_GS), |
| 3783 |
tmp, &newpc); |
| 3784 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3785 |
0, &instr_orig, NULL, &op1, &op2)) |
| 3786 |
return 0; |
| 3787 |
break; |
| 3788 |
case 0xb6: |
| 3789 |
case 0xb7: /* movzx */ |
| 3790 |
case 0xbe: |
| 3791 |
case 0xbf: /* movsx */ |
| 3792 |
instr_orig = instr; |
| 3793 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3794 |
(imm&1)==0? (MODRM_EIGHTBIT | |
| 3795 |
MODRM_R_NONEIGHTBIT) : MODRM_RM_16BIT, |
| 3796 |
&instr, &newpc, &op1, &op2)) |
| 3797 |
return 0; |
| 3798 |
signflag = 0; |
| 3799 |
if (imm >= 0xbe) |
| 3800 |
signflag = 1; |
| 3801 |
op2 = op1; |
| 3802 |
if (imm & 1) { /* r32 = r16 */ |
| 3803 |
op2 &= 0xffff; |
| 3804 |
if (signflag && op2 & 0x8000) |
| 3805 |
op2 |= 0xffff0000ULL; |
| 3806 |
} else { /* r(mode) = r8 */ |
| 3807 |
op2 &= 0xff; |
| 3808 |
if (signflag && op2 & 0x80) |
| 3809 |
op2 |= 0xffffff00ULL; |
| 3810 |
} |
| 3811 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3812 |
(imm&1)==0? (MODRM_EIGHTBIT | |
| 3813 |
MODRM_R_NONEIGHTBIT) : MODRM_RM_16BIT, |
| 3814 |
&instr_orig, NULL, &op1, &op2)) |
| 3815 |
return 0; |
| 3816 |
break; |
| 3817 |
case 0xba: |
| 3818 |
subop = (*instr >> 3) & 0x7; |
| 3819 |
switch (subop) { |
| 3820 |
case 4: /* BT */ |
| 3821 |
case 5: /* BTS */ |
| 3822 |
case 6: /* BTR */ |
| 3823 |
case 7: /* BTC */ |
| 3824 |
instr_orig = instr; |
| 3825 |
if (!modrm(cpu, MODRM_READ, mode, |
| 3826 |
mode67, 0, &instr, &newpc, &op1, |
| 3827 |
&op2)) |
| 3828 |
return 0; |
| 3829 |
imm = read_imm(&instr, &newpc, 8); |
| 3830 |
imm &= 31; |
| 3831 |
if (mode == 16) |
| 3832 |
imm &= 15; |
| 3833 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3834 |
if (op1 & ((uint64_t)1 << imm)) |
| 3835 |
cpu->cd.x86.rflags |= |
| 3836 |
X86_FLAGS_CF; |
| 3837 |
switch (subop) { |
| 3838 |
case 5: op1 |= ((uint64_t)1 << imm); |
| 3839 |
break; |
| 3840 |
case 6: op1 &= ~((uint64_t)1 << imm); |
| 3841 |
break; |
| 3842 |
case 7: op1 ^= ((uint64_t)1 << imm); |
| 3843 |
break; |
| 3844 |
} |
| 3845 |
if (subop != 4) { |
| 3846 |
if (!modrm(cpu, MODRM_WRITE_RM, |
| 3847 |
mode, mode67, 0, |
| 3848 |
&instr_orig, NULL, |
| 3849 |
&op1, &op2)) |
| 3850 |
return 0; |
| 3851 |
} |
| 3852 |
break; |
| 3853 |
default:fatal("UNIMPLEMENTED 0x%02x,0x%02x" |
| 3854 |
",0x%02x\n", op, imm, *instr); |
| 3855 |
quiet_mode = 0; |
| 3856 |
x86_cpu_disassemble_instr(cpu, |
| 3857 |
really_orig_instr, 1|omode, 0, 0); |
| 3858 |
cpu->running = 0; |
| 3859 |
} |
| 3860 |
break; |
| 3861 |
case 0xbc: /* bsf */ |
| 3862 |
case 0xbd: /* bsr */ |
| 3863 |
instr_orig = instr; |
| 3864 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3865 |
0, &instr, &newpc, &op1, &op2)) |
| 3866 |
return 0; |
| 3867 |
cpu->cd.x86.rflags &= ~X86_FLAGS_ZF; |
| 3868 |
if (op1 == 0) |
| 3869 |
cpu->cd.x86.rflags |= X86_FLAGS_ZF; |
| 3870 |
i = mode - 1; |
| 3871 |
if (imm == 0xbc) |
| 3872 |
i = 0; |
| 3873 |
for (;;) { |
| 3874 |
if (op1 & ((uint64_t)1<<i)) { |
| 3875 |
op2 = i; |
| 3876 |
break; |
| 3877 |
} |
| 3878 |
if (imm == 0xbc) { |
| 3879 |
if (++i >= mode) |
| 3880 |
break; |
| 3881 |
} else { |
| 3882 |
if (--i < 0) |
| 3883 |
break; |
| 3884 |
} |
| 3885 |
} |
| 3886 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3887 |
0, &instr_orig, NULL, &op1, &op2)) |
| 3888 |
return 0; |
| 3889 |
break; |
| 3890 |
case 0xc0: /* xadd */ |
| 3891 |
case 0xc1: |
| 3892 |
instr_orig = instr_orig_2 = instr; |
| 3893 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 3894 |
imm == 0xc0? MODRM_EIGHTBIT : 0, |
| 3895 |
&instr, &newpc, &op1, &op2)) |
| 3896 |
return 0; |
| 3897 |
tmp = op1; op1 = op2; op2 = tmp; |
| 3898 |
x86_calc_flags(cpu, op1, op2, imm==0xc0? |
| 3899 |
8 : mode, CALCFLAGS_OP_ADD); |
| 3900 |
op1 += op2; |
| 3901 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 3902 |
imm == 0xc0? MODRM_EIGHTBIT : 0, |
| 3903 |
&instr_orig, NULL, &op1, &op2)) |
| 3904 |
return 0; |
| 3905 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 3906 |
imm == 0xc0? MODRM_EIGHTBIT : 0, |
| 3907 |
&instr_orig_2, NULL, &op1, &op2)) |
| 3908 |
return 0; |
| 3909 |
break; |
| 3910 |
case 0xc7: |
| 3911 |
subop = (*instr >> 3) & 0x7; |
| 3912 |
switch (subop) { |
| 3913 |
case 1: /* CMPXCHG8B */ |
| 3914 |
if (!modrm(cpu, MODRM_READ, mode, |
| 3915 |
mode67, MODRM_JUST_GET_ADDR, &instr, |
| 3916 |
&newpc, &op1, &op2)) |
| 3917 |
return 0; |
| 3918 |
if (!x86_load(cpu, op1, &tmp, 8)) |
| 3919 |
return 0; |
| 3920 |
cpu->cd.x86.rflags &= ~X86_FLAGS_ZF; |
| 3921 |
if ((tmp >> 32) == (0xffffffffULL & |
| 3922 |
cpu->cd.x86.r[X86_R_DX]) && (tmp |
| 3923 |
& 0xffffffffULL) == (0xffffffffULL & |
| 3924 |
cpu->cd.x86.r[X86_R_AX])) { |
| 3925 |
cpu->cd.x86.rflags |= |
| 3926 |
X86_FLAGS_ZF; |
| 3927 |
tmp = ((cpu->cd.x86.r[X86_R_CX] |
| 3928 |
& 0xffffffffULL) << 32) | |
| 3929 |
(cpu->cd.x86.r[X86_R_BX] & |
| 3930 |
0xffffffffULL); |
| 3931 |
if (!x86_store(cpu, op1, tmp,8)) |
| 3932 |
return 0; |
| 3933 |
} else { |
| 3934 |
cpu->cd.x86.r[X86_R_DX] = |
| 3935 |
tmp >> 32; |
| 3936 |
cpu->cd.x86.r[X86_R_AX] = |
| 3937 |
tmp & 0xffffffffULL; |
| 3938 |
} |
| 3939 |
break; |
| 3940 |
default:fatal("UNIMPLEMENTED 0x%02x,0x%02x" |
| 3941 |
",0x%02x\n", op, imm, *instr); |
| 3942 |
quiet_mode = 0; |
| 3943 |
x86_cpu_disassemble_instr(cpu, |
| 3944 |
really_orig_instr, 1|omode, 0, 0); |
| 3945 |
cpu->running = 0; |
| 3946 |
} |
| 3947 |
break; |
| 3948 |
default:fatal("TODO: 0x0f,0x%02x\n", imm); |
| 3949 |
quiet_mode = 0; |
| 3950 |
x86_cpu_disassemble_instr(cpu, |
| 3951 |
really_orig_instr, 1|omode, 0, 0); |
| 3952 |
cpu->running = 0; |
| 3953 |
} |
| 3954 |
} |
| 3955 |
} else if ((op & 0xf0) < 0x20 && (op & 7) == 7) { |
| 3956 |
uint64_t tmp; |
| 3957 |
success = x86_pop(cpu, &tmp, mode); |
| 3958 |
if (!success) |
| 3959 |
return 0; |
| 3960 |
reload_segment_descriptor(cpu, op/8, tmp, &newpc); |
| 3961 |
} else if (op == 0x27) { /* DAA */ |
| 3962 |
int a = (cpu->cd.x86.r[X86_R_AX] >> 4) & 0xf; |
| 3963 |
int b = cpu->cd.x86.r[X86_R_AX] & 0xf; |
| 3964 |
if (b > 9) { |
| 3965 |
b -= 10; |
| 3966 |
a ++; |
| 3967 |
} else if (cpu->cd.x86.rflags & X86_FLAGS_AF) |
| 3968 |
b += 6; |
| 3969 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3970 |
cpu->cd.x86.rflags &= ~X86_FLAGS_AF; |
| 3971 |
if (a*10 + b >= 100) { |
| 3972 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 3973 |
cpu->cd.x86.rflags |= X86_FLAGS_AF; |
| 3974 |
a %= 10; |
| 3975 |
} |
| 3976 |
cpu->cd.x86.r[X86_R_AX] &= ~0xff; |
| 3977 |
cpu->cd.x86.r[X86_R_AX] |= ((a*16 + b) & 0xff); |
| 3978 |
} else if (op == 0x2f) { /* DAS */ |
| 3979 |
int tmp_al = cpu->cd.x86.r[X86_R_AX] & 0xff; |
| 3980 |
if ((tmp_al & 0xf) > 9 || cpu->cd.x86.rflags & X86_FLAGS_AF) { |
| 3981 |
cpu->cd.x86.r[X86_R_AX] &= ~0xff; |
| 3982 |
cpu->cd.x86.r[X86_R_AX] |= ((tmp_al - 6) & 0xff); |
| 3983 |
cpu->cd.x86.rflags |= X86_FLAGS_AF; |
| 3984 |
} else |
| 3985 |
cpu->cd.x86.rflags &= ~X86_FLAGS_AF; |
| 3986 |
if (tmp_al > 0x9f || cpu->cd.x86.rflags & X86_FLAGS_CF) { |
| 3987 |
cpu->cd.x86.r[X86_R_AX] &= ~0xff; |
| 3988 |
cpu->cd.x86.r[X86_R_AX] |= ((tmp_al - 0x60) & 0xff); |
| 3989 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 3990 |
} else |
| 3991 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 3992 |
x86_calc_flags(cpu, cpu->cd.x86.r[X86_R_AX] & 0xff, |
| 3993 |
0, 8, CALCFLAGS_OP_XOR); |
| 3994 |
} else if (op == 0x37) { /* AAA */ |
| 3995 |
int b = cpu->cd.x86.r[X86_R_AX] & 0xf; |
| 3996 |
if (b > 9) { |
| 3997 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] |
| 3998 |
& ~0xff00) | ((cpu->cd.x86.r[X86_R_AX] & |
| 3999 |
0xff00) + 0x100); |
| 4000 |
cpu->cd.x86.rflags |= X86_FLAGS_CF | X86_FLAGS_AF; |
| 4001 |
} else { |
| 4002 |
cpu->cd.x86.rflags &= ~(X86_FLAGS_CF | X86_FLAGS_AF); |
| 4003 |
} |
| 4004 |
cpu->cd.x86.r[X86_R_AX] &= ~0xf0; |
| 4005 |
} else if (op >= 0x40 && op <= 0x4f) { |
| 4006 |
int old_cf = cpu->cd.x86.rflags & X86_FLAGS_CF; |
| 4007 |
if (op < 0x48) { |
| 4008 |
x86_calc_flags(cpu, cpu->cd.x86.r[op & 7], 1, mode, |
| 4009 |
CALCFLAGS_OP_ADD); |
| 4010 |
cpu->cd.x86.r[op & 7] = modify(cpu->cd.x86.r[op & 7], |
| 4011 |
cpu->cd.x86.r[op & 7] + 1); |
| 4012 |
} else { |
| 4013 |
x86_calc_flags(cpu, cpu->cd.x86.r[op & 7], 1, mode, |
| 4014 |
CALCFLAGS_OP_SUB); |
| 4015 |
if (mode == 16) |
| 4016 |
cpu->cd.x86.r[op & 7] = modify(cpu->cd.x86.r[op |
| 4017 |
& 7], (cpu->cd.x86.r[op & 7] & 0xffff) - 1); |
| 4018 |
else { |
| 4019 |
cpu->cd.x86.r[op & 7] --; |
| 4020 |
cpu->cd.x86.r[op & 7] &= 0xffffffffULL; |
| 4021 |
} |
| 4022 |
} |
| 4023 |
/* preserve CF: */ |
| 4024 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 4025 |
cpu->cd.x86.rflags |= old_cf; |
| 4026 |
} else if (op >= 0x50 && op <= 0x57) { |
| 4027 |
if (!x86_push(cpu, cpu->cd.x86.r[op & 7], mode)) |
| 4028 |
return 0; |
| 4029 |
} else if (op >= 0x58 && op <= 0x5f) { |
| 4030 |
if (!x86_pop(cpu, &tmp, mode)) |
| 4031 |
return 0; |
| 4032 |
if (mode == 16) |
| 4033 |
cpu->cd.x86.r[op & 7] = (cpu->cd.x86.r[op & 7] & |
| 4034 |
~0xffff) | (tmp & 0xffff); |
| 4035 |
else |
| 4036 |
cpu->cd.x86.r[op & 7] = tmp; |
| 4037 |
} else if (op == 0x60) { /* PUSHA/PUSHAD */ |
| 4038 |
uint64_t r[8]; |
| 4039 |
int i; |
| 4040 |
for (i=0; i<8; i++) |
| 4041 |
r[i] = cpu->cd.x86.r[i]; |
| 4042 |
for (i=0; i<8; i++) |
| 4043 |
if (!x86_push(cpu, r[i], mode)) { |
| 4044 |
fatal("TODO: failed pusha\n"); |
| 4045 |
cpu->running = 0; |
| 4046 |
return 0; |
| 4047 |
} |
| 4048 |
} else if (op == 0x61) { /* POPA/POPAD */ |
| 4049 |
uint64_t r[8]; |
| 4050 |
int i; |
| 4051 |
for (i=7; i>=0; i--) |
| 4052 |
if (!x86_pop(cpu, &r[i], mode)) { |
| 4053 |
fatal("TODO: failed popa\n"); |
| 4054 |
cpu->running = 0; |
| 4055 |
return 0; |
| 4056 |
} |
| 4057 |
for (i=0; i<8; i++) |
| 4058 |
if (i != X86_R_SP) { |
| 4059 |
if (mode == 16) |
| 4060 |
cpu->cd.x86.r[i] = (cpu->cd.x86.r[i] |
| 4061 |
& ~0xffff) | (r[i] & 0xffff); |
| 4062 |
else |
| 4063 |
cpu->cd.x86.r[i] = r[i]; |
| 4064 |
} |
| 4065 |
} else if (op == 0x68) { /* PUSH imm16/32 */ |
| 4066 |
uint64_t imm = read_imm(&instr, &newpc, mode); |
| 4067 |
if (!x86_push(cpu, imm, mode)) |
| 4068 |
return 0; |
| 4069 |
} else if (op == 0x69 || op == 0x6b) { |
| 4070 |
instr_orig = instr; |
| 4071 |
if (!modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 4072 |
&newpc, &op1, &op2)) |
| 4073 |
return 0; |
| 4074 |
if (op == 0x69) |
| 4075 |
imm = read_imm(&instr, &newpc, mode); |
| 4076 |
else |
| 4077 |
imm = (signed char)read_imm(&instr, &newpc, 8); |
| 4078 |
op2 = op1 * imm; |
| 4079 |
/* TODO: overflow! */ |
| 4080 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, 0, |
| 4081 |
&instr_orig, NULL, &op1, &op2)) |
| 4082 |
return 0; |
| 4083 |
} else if (op == 0x6a) { /* PUSH imm8 */ |
| 4084 |
uint64_t imm = (signed char)read_imm(&instr, &newpc, 8); |
| 4085 |
if (!x86_push(cpu, imm, mode)) |
| 4086 |
return 0; |
| 4087 |
} else if ((op & 0xf0) == 0x70) { |
| 4088 |
imm = read_imm(&instr, &newpc, 8); |
| 4089 |
success = x86_condition(cpu, op); |
| 4090 |
if (success) |
| 4091 |
newpc = modify(newpc, newpc + (signed char)imm); |
| 4092 |
} else if (op == 0x80 || op == 0x81) { /* add/and r/m, imm */ |
| 4093 |
instr_orig = instr; |
| 4094 |
if (!modrm(cpu, MODRM_READ, mode, mode67, op == 0x80? |
| 4095 |
MODRM_EIGHTBIT : 0, &instr, &newpc, &op1, &op2)) |
| 4096 |
return 0; |
| 4097 |
imm = read_imm(&instr, &newpc, op==0x80? 8 : mode); |
| 4098 |
switch ((*instr_orig >> 3) & 0x7) { |
| 4099 |
case 0: x86_calc_flags(cpu, op1, imm, op==0x80? 8 : mode, |
| 4100 |
CALCFLAGS_OP_ADD); |
| 4101 |
op1 += imm; |
| 4102 |
break; |
| 4103 |
case 1: op1 |= imm; break; |
| 4104 |
case 2: tmp = imm + (cpu->cd.x86.rflags & X86_FLAGS_CF? 1 : 0); |
| 4105 |
x86_calc_flags(cpu, op1, tmp, op==0x80? 8 : mode, |
| 4106 |
CALCFLAGS_OP_ADD); |
| 4107 |
op1 += tmp; |
| 4108 |
break; |
| 4109 |
case 3: tmp = imm + (cpu->cd.x86.rflags & X86_FLAGS_CF? 1 : 0); |
| 4110 |
x86_calc_flags(cpu, op1, tmp, op==0x80? 8 : mode, |
| 4111 |
CALCFLAGS_OP_SUB); |
| 4112 |
op1 -= tmp; |
| 4113 |
break; |
| 4114 |
case 4: op1 &= imm; break; |
| 4115 |
case 5: x86_calc_flags(cpu, op1, imm, op==0x80? 8 : mode, |
| 4116 |
CALCFLAGS_OP_SUB); |
| 4117 |
op1 -= imm; break; |
| 4118 |
case 6: op1 ^= imm; break; |
| 4119 |
case 7: x86_calc_flags(cpu, op1, imm, op==0x80? 8 : mode, |
| 4120 |
CALCFLAGS_OP_SUB); /* cmp */ |
| 4121 |
break; |
| 4122 |
} |
| 4123 |
|
| 4124 |
if (((*instr_orig >> 3) & 0x7) != 7) { |
| 4125 |
if (((*instr_orig >> 3) & 0x7) != 0 && |
| 4126 |
((*instr_orig >> 3) & 0x7) != 2 && |
| 4127 |
((*instr_orig >> 3) & 0x7) != 3 && |
| 4128 |
((*instr_orig >> 3) & 0x7) != 5) |
| 4129 |
x86_calc_flags(cpu, op1, 0, op==0x80? 8 : mode, |
| 4130 |
CALCFLAGS_OP_XOR); |
| 4131 |
|
| 4132 |
/* "and","or","xor" always clears CF and OF: */ |
| 4133 |
if (((*instr_orig >> 3) & 0x7) == 1 || |
| 4134 |
((*instr_orig >> 3) & 0x7) == 4 || |
| 4135 |
((*instr_orig >> 3) & 0x7) == 6) { |
| 4136 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 4137 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 4138 |
} |
| 4139 |
|
| 4140 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4141 |
op == 0x80? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4142 |
NULL, &op1, &op2)) |
| 4143 |
return 0; |
| 4144 |
} |
| 4145 |
} else if (op == 0x83) { /* add/and r/m1632, imm8 */ |
| 4146 |
instr_orig = instr; |
| 4147 |
if (!modrm(cpu, MODRM_READ, mode, mode67, 0, &instr, |
| 4148 |
&newpc, &op1, &op2)) |
| 4149 |
return 0; |
| 4150 |
imm = read_imm(&instr, &newpc, 8); |
| 4151 |
switch ((*instr_orig >> 3) & 0x7) { |
| 4152 |
case 0: x86_calc_flags(cpu, op1, (signed char)imm, |
| 4153 |
mode, CALCFLAGS_OP_ADD); |
| 4154 |
op1 += (signed char)imm; |
| 4155 |
break; |
| 4156 |
case 1: op1 |= (signed char)imm; break; |
| 4157 |
case 2: tmp = (signed char)imm + |
| 4158 |
(cpu->cd.x86.rflags & X86_FLAGS_CF? 1 : 0); |
| 4159 |
x86_calc_flags(cpu, op1, tmp, mode, CALCFLAGS_OP_ADD); |
| 4160 |
op1 += tmp; |
| 4161 |
break; |
| 4162 |
case 3: tmp = (signed char)imm + |
| 4163 |
(cpu->cd.x86.rflags & X86_FLAGS_CF? 1 : 0); |
| 4164 |
x86_calc_flags(cpu, op1, tmp, mode, CALCFLAGS_OP_SUB); |
| 4165 |
op1 -= tmp; |
| 4166 |
break; |
| 4167 |
case 4: op1 &= (signed char)imm; break; |
| 4168 |
case 5: x86_calc_flags(cpu, op1, (signed char)imm, mode, |
| 4169 |
CALCFLAGS_OP_SUB); |
| 4170 |
op1 -= (signed char)imm; break; |
| 4171 |
case 6: op1 ^= (signed char)imm; break; |
| 4172 |
case 7: x86_calc_flags(cpu, op1, (signed char)imm, mode, |
| 4173 |
CALCFLAGS_OP_SUB); |
| 4174 |
break; |
| 4175 |
} |
| 4176 |
if (((*instr_orig >> 3) & 0x7) != 7) { |
| 4177 |
if (((*instr_orig >> 3) & 0x7) != 0 && |
| 4178 |
((*instr_orig >> 3) & 0x7) != 2 && |
| 4179 |
((*instr_orig >> 3) & 0x7) != 3 && |
| 4180 |
((*instr_orig >> 3) & 0x7) != 5) |
| 4181 |
x86_calc_flags(cpu, op1, 0, mode, |
| 4182 |
CALCFLAGS_OP_XOR); |
| 4183 |
|
| 4184 |
/* "and","or","xor" always clears CF and OF: */ |
| 4185 |
if (((*instr_orig >> 3) & 0x7) == 1 || |
| 4186 |
((*instr_orig >> 3) & 0x7) == 4 || |
| 4187 |
((*instr_orig >> 3) & 0x7) == 6) { |
| 4188 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 4189 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 4190 |
} |
| 4191 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, |
| 4192 |
mode67, 0, &instr_orig, NULL, &op1, &op2)) |
| 4193 |
return 0; |
| 4194 |
} |
| 4195 |
} else if (op == 0x84 || op == 0x85) { /* TEST */ |
| 4196 |
success = modrm(cpu, MODRM_READ, mode, mode67, op == 0x84? |
| 4197 |
MODRM_EIGHTBIT : 0, &instr, &newpc, &op1, &op2); |
| 4198 |
if (!success) |
| 4199 |
return 0; |
| 4200 |
op1 &= op2; |
| 4201 |
x86_calc_flags(cpu, op1, 0, op==0x84? 8 : mode, |
| 4202 |
CALCFLAGS_OP_XOR); |
| 4203 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 4204 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 4205 |
} else if (op >= 0x86 && op <= 0x87) { /* XCHG */ |
| 4206 |
void *orig2 = instr_orig = instr; |
| 4207 |
success = modrm(cpu, MODRM_READ, mode, mode67, op&1? 0 : |
| 4208 |
MODRM_EIGHTBIT, &instr, &newpc, &op1, &op2); |
| 4209 |
if (!success) |
| 4210 |
return 0; |
| 4211 |
/* Note: Update the r/m first, because it may be dependant |
| 4212 |
on original register values :-) */ |
| 4213 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4214 |
op == 0x86? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4215 |
NULL, &op2, &op1); |
| 4216 |
instr_orig = orig2; |
| 4217 |
success = modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 4218 |
op == 0x86? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4219 |
NULL, &op2, &op1); |
| 4220 |
if (!success) |
| 4221 |
return 0; |
| 4222 |
} else if (op >= 0x88 && op <= 0x8b) { /* MOV */ |
| 4223 |
instr_orig = instr; |
| 4224 |
success = modrm(cpu, MODRM_READ, mode, mode67, (op & 1) == 0? |
| 4225 |
MODRM_EIGHTBIT : 0, &instr, &newpc, &op1, &op2); |
| 4226 |
if (!success) |
| 4227 |
return 0; |
| 4228 |
if (op < 0x8a) { |
| 4229 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4230 |
op == 0x88? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4231 |
NULL, &op2, &op1); |
| 4232 |
} else { |
| 4233 |
success = modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 4234 |
op == 0x8a? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4235 |
NULL, &op2, &op1); |
| 4236 |
} |
| 4237 |
if (!success) |
| 4238 |
return 0; |
| 4239 |
} else if (op == 0x8c || op == 0x8e) { /* MOV seg */ |
| 4240 |
instr_orig = instr; |
| 4241 |
if (!modrm(cpu, MODRM_READ, 16, mode67, MODRM_SEG, |
| 4242 |
&instr, &newpc, &op1, &op2)) |
| 4243 |
return 0; |
| 4244 |
if (op == 0x8c) { |
| 4245 |
if (!modrm(cpu, MODRM_WRITE_RM, 16, mode67, MODRM_SEG, |
| 4246 |
&instr_orig, NULL, &op2, &op1)) |
| 4247 |
return 0; |
| 4248 |
} else { |
| 4249 |
reload_segment_descriptor(cpu, (*instr_orig >> 3) & 7, |
| 4250 |
op1 & 0xffff, &newpc); |
| 4251 |
} |
| 4252 |
} else if (op == 0x8d) { /* LEA */ |
| 4253 |
instr_orig = instr; |
| 4254 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 4255 |
MODRM_JUST_GET_ADDR, &instr, &newpc, &op1, &op2)) |
| 4256 |
return 0; |
| 4257 |
op2 = op1; |
| 4258 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 4259 |
0, &instr_orig, NULL, &op1, &op2)) |
| 4260 |
return 0; |
| 4261 |
} else if (op == 0x8f) { |
| 4262 |
switch ((*instr >> 3) & 0x7) { |
| 4263 |
case 0: /* POP m16/m32 */ |
| 4264 |
if (!x86_pop(cpu, &op1, mode)) |
| 4265 |
return 0; |
| 4266 |
if (!modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4267 |
0, &instr, &newpc, &op1, &op2)) |
| 4268 |
return 0; |
| 4269 |
break; |
| 4270 |
default: |
| 4271 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4272 |
quiet_mode = 0; |
| 4273 |
x86_cpu_disassemble_instr(cpu, |
| 4274 |
really_orig_instr, 1|omode, 0, 0); |
| 4275 |
cpu->running = 0; |
| 4276 |
} |
| 4277 |
} else if (op == 0x90) { /* NOP */ |
| 4278 |
} else if (op >= 0x91 && op <= 0x97) { /* XCHG */ |
| 4279 |
uint64_t tmp; |
| 4280 |
if (mode == 16) { |
| 4281 |
tmp = cpu->cd.x86.r[X86_R_AX]; |
| 4282 |
cpu->cd.x86.r[X86_R_AX] = modify( |
| 4283 |
cpu->cd.x86.r[X86_R_AX], cpu->cd.x86.r[op & 7]); |
| 4284 |
cpu->cd.x86.r[op & 7] = modify( |
| 4285 |
cpu->cd.x86.r[op & 7], tmp); |
| 4286 |
} else { |
| 4287 |
tmp = cpu->cd.x86.r[X86_R_AX]; |
| 4288 |
cpu->cd.x86.r[X86_R_AX] = cpu->cd.x86.r[op & 7]; |
| 4289 |
cpu->cd.x86.r[op & 7] = tmp; |
| 4290 |
} |
| 4291 |
} else if (op == 0x98) { /* CBW/CWDE */ |
| 4292 |
if (mode == 16) { |
| 4293 |
cpu->cd.x86.r[X86_R_AX] &= ~0xff00; |
| 4294 |
if (cpu->cd.x86.r[X86_R_AX] & 0x80) |
| 4295 |
cpu->cd.x86.r[X86_R_AX] |= 0xff00; |
| 4296 |
} else { |
| 4297 |
cpu->cd.x86.r[X86_R_AX] &= 0xffff; |
| 4298 |
if (cpu->cd.x86.r[X86_R_AX] & 0x8000) |
| 4299 |
cpu->cd.x86.r[X86_R_AX] |= 0xffff0000ULL; |
| 4300 |
} |
| 4301 |
} else if (op == 0x99) { /* CWD/CDQ */ |
| 4302 |
if (mode == 16) { |
| 4303 |
cpu->cd.x86.r[X86_R_DX] &= ~0xffff; |
| 4304 |
if (cpu->cd.x86.r[X86_R_AX] & 0x8000) |
| 4305 |
cpu->cd.x86.r[X86_R_DX] |= 0xffff; |
| 4306 |
} else { |
| 4307 |
cpu->cd.x86.r[X86_R_DX] = 0; |
| 4308 |
if (cpu->cd.x86.r[X86_R_AX] & 0x80000000ULL) |
| 4309 |
cpu->cd.x86.r[X86_R_DX] = 0xffffffff; |
| 4310 |
} |
| 4311 |
} else if (op == 0x9a) { /* CALL seg:ofs */ |
| 4312 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 4313 |
imm = read_imm(&instr, &newpc, mode); |
| 4314 |
imm2 = read_imm(&instr, &newpc, 16); |
| 4315 |
if (!x86_push(cpu, cpu->cd.x86.s[X86_S_CS], mode)) |
| 4316 |
return 0; |
| 4317 |
if (!x86_push(cpu, newpc, mode)) { |
| 4318 |
fatal("TODO: push failed in CALL seg:ofs\n"); |
| 4319 |
cpu->running = 0; |
| 4320 |
return 0; |
| 4321 |
} |
| 4322 |
reload_segment_descriptor(cpu, X86_S_CS, imm2, &newpc); |
| 4323 |
if (cpu->cd.x86.tr == old_tr) |
| 4324 |
newpc = imm; |
| 4325 |
} else if (op == 0x9b) { /* WAIT */ |
| 4326 |
} else if (op == 0x9c) { /* PUSHF */ |
| 4327 |
if (!x86_push(cpu, cpu->cd.x86.rflags, mode)) |
| 4328 |
return 0; |
| 4329 |
} else if (op == 0x9d) { /* POPF */ |
| 4330 |
if (!x86_pop(cpu, &tmp, mode)) |
| 4331 |
return 0; |
| 4332 |
if (mode == 16) |
| 4333 |
cpu->cd.x86.rflags = (cpu->cd.x86.rflags & ~0xffff) |
| 4334 |
| (tmp & 0xffff); |
| 4335 |
else if (mode == 32) |
| 4336 |
cpu->cd.x86.rflags = (cpu->cd.x86.rflags & ~0xffffffff) |
| 4337 |
| (tmp & 0xffffffff); |
| 4338 |
else |
| 4339 |
cpu->cd.x86.rflags = tmp; |
| 4340 |
/* TODO: only affect some bits? */ |
| 4341 |
cpu->cd.x86.rflags |= 0x0002; |
| 4342 |
if (cpu->cd.x86.model.model_number == X86_MODEL_8086) |
| 4343 |
cpu->cd.x86.rflags |= 0xf000; |
| 4344 |
/* TODO: all these bits aren't really cleared on a 286: */ |
| 4345 |
if (cpu->cd.x86.model.model_number == X86_MODEL_80286) |
| 4346 |
cpu->cd.x86.rflags &= ~0xf000; |
| 4347 |
if (cpu->cd.x86.model.model_number == X86_MODEL_80386) |
| 4348 |
cpu->cd.x86.rflags &= ~X86_FLAGS_AC; |
| 4349 |
if (cpu->cd.x86.model.model_number == X86_MODEL_80486) |
| 4350 |
cpu->cd.x86.rflags &= ~X86_FLAGS_ID; |
| 4351 |
} else if (op == 0x9e) { /* SAHF */ |
| 4352 |
int mask = (X86_FLAGS_SF | X86_FLAGS_ZF |
| 4353 |
| X86_FLAGS_AF | X86_FLAGS_PF | X86_FLAGS_CF); |
| 4354 |
cpu->cd.x86.rflags &= ~mask; |
| 4355 |
mask &= ((cpu->cd.x86.r[X86_R_AX] >> 8) & 0xff); |
| 4356 |
cpu->cd.x86.rflags |= mask; |
| 4357 |
} else if (op == 0x9f) { /* LAHF */ |
| 4358 |
int b = cpu->cd.x86.rflags & (X86_FLAGS_SF | X86_FLAGS_ZF |
| 4359 |
| X86_FLAGS_AF | X86_FLAGS_PF | X86_FLAGS_CF); |
| 4360 |
b |= 2; |
| 4361 |
cpu->cd.x86.r[X86_R_AX] &= ~0xff00; |
| 4362 |
cpu->cd.x86.r[X86_R_AX] |= (b << 8); |
| 4363 |
} else if (op == 0xa0) { /* MOV AL,[addr] */ |
| 4364 |
imm = read_imm(&instr, &newpc, mode67); |
| 4365 |
if (!x86_load(cpu, imm, &tmp, 1)) |
| 4366 |
return 0; |
| 4367 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & ~0xff) |
| 4368 |
| (tmp & 0xff); |
| 4369 |
} else if (op == 0xa1) { /* MOV AX,[addr] */ |
| 4370 |
imm = read_imm(&instr, &newpc, mode67); |
| 4371 |
if (!x86_load(cpu, imm, &tmp, mode/8)) |
| 4372 |
return 0; |
| 4373 |
cpu->cd.x86.r[X86_R_AX] = modify(cpu->cd.x86.r[X86_R_AX], tmp); |
| 4374 |
} else if (op == 0xa2) { /* MOV [addr],AL */ |
| 4375 |
imm = read_imm(&instr, &newpc, mode67); |
| 4376 |
if (!x86_store(cpu, imm, cpu->cd.x86.r[X86_R_AX], 1)) |
| 4377 |
return 0; |
| 4378 |
} else if (op == 0xa3) { /* MOV [addr],AX */ |
| 4379 |
imm = read_imm(&instr, &newpc, mode67); |
| 4380 |
if (!x86_store(cpu, imm, cpu->cd.x86.r[X86_R_AX], mode/8)) |
| 4381 |
return 0; |
| 4382 |
} else if (op == 0xa4 || op == 0xa5 || /* MOVS */ |
| 4383 |
op == 0xa6 || op == 0xa7 || /* CMPS */ |
| 4384 |
op == 0xaa || op == 0xab || /* STOS */ |
| 4385 |
op == 0xac || op == 0xad || /* LODS */ |
| 4386 |
op == 0xae || op == 0xaf) { /* SCAS */ |
| 4387 |
int dir = 1, movs = 0, lods = 0, cmps = 0, stos = 0, scas = 0; |
| 4388 |
int origcursegment = cpu->cd.x86.cursegment; |
| 4389 |
|
| 4390 |
len = 1; |
| 4391 |
if (op & 1) |
| 4392 |
len = mode / 8; |
| 4393 |
if (op >= 0xa4 && op <= 0xa5) |
| 4394 |
movs = 1; |
| 4395 |
if (op >= 0xa6 && op <= 0xa7) |
| 4396 |
cmps = 1; |
| 4397 |
if (op >= 0xaa && op <= 0xab) |
| 4398 |
stos = 1; |
| 4399 |
if (op >= 0xac && op <= 0xad) |
| 4400 |
lods = 1; |
| 4401 |
if (op >= 0xae && op <= 0xaf) |
| 4402 |
scas = 1; |
| 4403 |
if (cpu->cd.x86.rflags & X86_FLAGS_DF) |
| 4404 |
dir = -1; |
| 4405 |
|
| 4406 |
do { |
| 4407 |
uint64_t value; |
| 4408 |
|
| 4409 |
if (rep) { |
| 4410 |
/* Abort if [e]cx already 0: */ |
| 4411 |
if (mode == 16 && (cpu->cd.x86.r[X86_R_CX] & |
| 4412 |
0xffff) == 0) |
| 4413 |
break; |
| 4414 |
if (mode != 16 && cpu->cd.x86.r[X86_R_CX] == 0) |
| 4415 |
break; |
| 4416 |
} |
| 4417 |
|
| 4418 |
if (!stos && !scas) { |
| 4419 |
uint64_t addr = cpu->cd.x86.r[X86_R_SI]; |
| 4420 |
if (mode67 == 16) |
| 4421 |
addr &= 0xffff; |
| 4422 |
if (mode67 == 32) |
| 4423 |
addr &= 0xffffffff; |
| 4424 |
cpu->cd.x86.cursegment = origcursegment; |
| 4425 |
if (!x86_load(cpu, addr, &value, len)) |
| 4426 |
return 0; |
| 4427 |
} else |
| 4428 |
value = cpu->cd.x86.r[X86_R_AX]; |
| 4429 |
if (lods) { |
| 4430 |
if (op == 0xac) |
| 4431 |
cpu->cd.x86.r[X86_R_AX] = |
| 4432 |
(cpu->cd.x86.r[X86_R_AX] & ~0xff) |
| 4433 |
| (value & 0xff); |
| 4434 |
else if (mode == 16) |
| 4435 |
cpu->cd.x86.r[X86_R_AX] = |
| 4436 |
(cpu->cd.x86.r[X86_R_AX] & ~0xffff) |
| 4437 |
| (value & 0xffff); |
| 4438 |
else |
| 4439 |
cpu->cd.x86.r[X86_R_AX] = value; |
| 4440 |
} |
| 4441 |
|
| 4442 |
if (stos || movs) { |
| 4443 |
uint64_t addr = cpu->cd.x86.r[X86_R_DI]; |
| 4444 |
if (mode67 == 16) |
| 4445 |
addr &= 0xffff; |
| 4446 |
if (mode67 == 32) |
| 4447 |
addr &= 0xffffffff; |
| 4448 |
cpu->cd.x86.cursegment = X86_S_ES; |
| 4449 |
if (!x86_store(cpu, addr, value, len)) |
| 4450 |
return 0; |
| 4451 |
} |
| 4452 |
if (cmps || scas) { |
| 4453 |
uint64_t addr = cpu->cd.x86.r[X86_R_DI]; |
| 4454 |
if (mode67 == 16) |
| 4455 |
addr &= 0xffff; |
| 4456 |
if (mode67 == 32) |
| 4457 |
addr &= 0xffffffff; |
| 4458 |
cpu->cd.x86.cursegment = X86_S_ES; |
| 4459 |
if (!x86_load(cpu, addr, &tmp, len)) |
| 4460 |
return 0; |
| 4461 |
|
| 4462 |
x86_calc_flags(cpu, value, tmp, len*8, |
| 4463 |
CALCFLAGS_OP_SUB); |
| 4464 |
} |
| 4465 |
|
| 4466 |
if (movs || lods || cmps) { |
| 4467 |
/* Modify esi: */ |
| 4468 |
if (mode67 == 16) |
| 4469 |
cpu->cd.x86.r[X86_R_SI] = |
| 4470 |
(cpu->cd.x86.r[X86_R_SI] & ~0xffff) |
| 4471 |
| ((cpu->cd.x86.r[X86_R_SI]+len*dir) |
| 4472 |
& 0xffff); |
| 4473 |
else { |
| 4474 |
cpu->cd.x86.r[X86_R_SI] += len*dir; |
| 4475 |
if (mode67 == 32) |
| 4476 |
cpu->cd.x86.r[X86_R_SI] &= |
| 4477 |
0xffffffff; |
| 4478 |
} |
| 4479 |
} |
| 4480 |
|
| 4481 |
if (!lods) { |
| 4482 |
/* Modify edi: */ |
| 4483 |
if (mode67 == 16) |
| 4484 |
cpu->cd.x86.r[X86_R_DI] = |
| 4485 |
(cpu->cd.x86.r[X86_R_DI] & ~0xffff) |
| 4486 |
| ((cpu->cd.x86.r[X86_R_DI]+len*dir) |
| 4487 |
& 0xffff); |
| 4488 |
else { |
| 4489 |
cpu->cd.x86.r[X86_R_DI] += len*dir; |
| 4490 |
if (mode67 == 32) |
| 4491 |
cpu->cd.x86.r[X86_R_DI] &= |
| 4492 |
0xffffffff; |
| 4493 |
} |
| 4494 |
} |
| 4495 |
|
| 4496 |
if (rep) { |
| 4497 |
/* Decrement ecx: */ |
| 4498 |
if (mode67 == 16) |
| 4499 |
cpu->cd.x86.r[X86_R_CX] = |
| 4500 |
(cpu->cd.x86.r[X86_R_CX] & ~0xffff) |
| 4501 |
| ((cpu->cd.x86.r[X86_R_CX] - 1) |
| 4502 |
& 0xffff); |
| 4503 |
else { |
| 4504 |
cpu->cd.x86.r[X86_R_CX] --; |
| 4505 |
cpu->cd.x86.r[X86_R_CX] &= 0xffffffff; |
| 4506 |
} |
| 4507 |
if (mode67 == 16 && (cpu->cd.x86.r[X86_R_CX] & |
| 4508 |
0xffff) == 0) |
| 4509 |
rep = 0; |
| 4510 |
if (mode67 != 16 && |
| 4511 |
cpu->cd.x86.r[X86_R_CX] == 0) |
| 4512 |
rep = 0; |
| 4513 |
|
| 4514 |
if (cmps || scas) { |
| 4515 |
if (rep == REP_REP && !( |
| 4516 |
cpu->cd.x86.rflags & X86_FLAGS_ZF)) |
| 4517 |
rep = 0; |
| 4518 |
if (rep == REP_REPNE && |
| 4519 |
cpu->cd.x86.rflags & X86_FLAGS_ZF) |
| 4520 |
rep = 0; |
| 4521 |
} |
| 4522 |
} |
| 4523 |
} while (rep); |
| 4524 |
} else if (op >= 0xa8 && op <= 0xa9) { /* TEST al/[e]ax,imm */ |
| 4525 |
op1 = cpu->cd.x86.r[X86_R_AX]; |
| 4526 |
op2 = read_imm(&instr, &newpc, op==0xa8? 8 : mode); |
| 4527 |
op1 &= op2; |
| 4528 |
x86_calc_flags(cpu, op1, 0, op==0xa8? 8 : mode, |
| 4529 |
CALCFLAGS_OP_XOR); |
| 4530 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 4531 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 4532 |
} else if (op >= 0xb0 && op <= 0xb3) { /* MOV Xl,imm */ |
| 4533 |
imm = read_imm(&instr, &newpc, 8); |
| 4534 |
cpu->cd.x86.r[op & 3] = (cpu->cd.x86.r[op & 3] & ~0xff) |
| 4535 |
| (imm & 0xff); |
| 4536 |
} else if (op >= 0xb4 && op <= 0xb7) { /* MOV Xh,imm */ |
| 4537 |
imm = read_imm(&instr, &newpc, 8); |
| 4538 |
cpu->cd.x86.r[op & 3] = (cpu->cd.x86.r[op & 3] & ~0xff00) |
| 4539 |
| ((imm & 0xff) << 8); |
| 4540 |
} else if (op >= 0xb8 && op <= 0xbf) { /* MOV Xx,imm */ |
| 4541 |
imm = read_imm(&instr, &newpc, mode); |
| 4542 |
cpu->cd.x86.r[op & 7] = modify(cpu->cd.x86.r[op & 7], imm); |
| 4543 |
} else if (op == 0xc0 || op == 0xc1) { /* Shift/Rotate */ |
| 4544 |
int n = 1; |
| 4545 |
instr_orig = instr; |
| 4546 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 4547 |
op&1? 0 : MODRM_EIGHTBIT, &instr, &newpc, &op1, &op2); |
| 4548 |
if (!success) |
| 4549 |
return 0; |
| 4550 |
n = read_imm(&instr, &newpc, 8); |
| 4551 |
x86_shiftrotate(cpu, &op1, (*instr_orig >> 3) & 0x7, |
| 4552 |
n, op&1? mode : 8); |
| 4553 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4554 |
op&1? 0 : MODRM_EIGHTBIT, &instr_orig, NULL, &op1, &op2); |
| 4555 |
if (!success) |
| 4556 |
return 0; |
| 4557 |
} else if (op == 0xc2 || op == 0xc3) { /* RET near */ |
| 4558 |
uint64_t popped_pc; |
| 4559 |
if (!x86_pop(cpu, &popped_pc, mode)) |
| 4560 |
return 0; |
| 4561 |
if (op == 0xc2) { |
| 4562 |
imm = read_imm(&instr, &newpc, 16); |
| 4563 |
cpu->cd.x86.r[X86_R_SP] = modify(cpu->cd.x86.r[ |
| 4564 |
X86_R_SP], cpu->cd.x86.r[X86_R_SP] + imm); |
| 4565 |
} |
| 4566 |
newpc = popped_pc; |
| 4567 |
} else if (op == 0xc4 || op == 0xc5) { /* LDS,LES */ |
| 4568 |
instr_orig = instr; |
| 4569 |
if (!modrm(cpu, MODRM_READ, mode, mode67, |
| 4570 |
MODRM_JUST_GET_ADDR, &instr, &newpc, &op1, &op2)) |
| 4571 |
return 0; |
| 4572 |
/* op1 is the address to load from */ |
| 4573 |
if (!x86_load(cpu, op1, &tmp, mode/8)) |
| 4574 |
return 0; |
| 4575 |
op2 = tmp; |
| 4576 |
if (!x86_load(cpu, op1 + mode/8, &tmp, 2)) |
| 4577 |
return 0; |
| 4578 |
reload_segment_descriptor(cpu, op==0xc4? X86_S_ES:X86_S_DS, |
| 4579 |
tmp, &newpc); |
| 4580 |
if (!modrm(cpu, MODRM_WRITE_R, mode, mode67, |
| 4581 |
0, &instr_orig, NULL, &op1, &op2)) |
| 4582 |
return 0; |
| 4583 |
} else if (op >= 0xc6 && op <= 0xc7) { |
| 4584 |
switch ((*instr >> 3) & 0x7) { |
| 4585 |
case 0: instr_orig = instr; /* MOV r/m, imm */ |
| 4586 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 4587 |
op == 0xc6? MODRM_EIGHTBIT : 0, &instr, |
| 4588 |
&newpc, &op1, &op2); |
| 4589 |
if (!success) |
| 4590 |
return 0; |
| 4591 |
imm = read_imm(&instr, &newpc, op == 0xc6? 8 : mode); |
| 4592 |
op1 = imm; |
| 4593 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4594 |
op == 0xc6? MODRM_EIGHTBIT : 0, &instr_orig, |
| 4595 |
NULL, &op1, &op2); |
| 4596 |
if (!success) |
| 4597 |
return 0; |
| 4598 |
break; |
| 4599 |
default: |
| 4600 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4601 |
quiet_mode = 0; |
| 4602 |
x86_cpu_disassemble_instr(cpu, |
| 4603 |
really_orig_instr, 1|omode, 0, 0); |
| 4604 |
cpu->running = 0; |
| 4605 |
} |
| 4606 |
} else if (op == 0xc8) { /* ENTER */ |
| 4607 |
uint64_t tmp_frame_ptr; |
| 4608 |
int level; |
| 4609 |
imm = read_imm(&instr, &newpc, 16); |
| 4610 |
level = read_imm(&instr, &newpc, 8); |
| 4611 |
if (!x86_push(cpu, cpu->cd.x86.r[X86_R_BP], mode)) |
| 4612 |
return 0; |
| 4613 |
tmp_frame_ptr = cpu->cd.x86.r[X86_R_SP]; |
| 4614 |
if (level > 0) { |
| 4615 |
while (level-- > 1) { |
| 4616 |
uint64_t tmpword; |
| 4617 |
cpu->cd.x86.r[X86_R_BP] = modify( |
| 4618 |
cpu->cd.x86.r[X86_R_BP], |
| 4619 |
cpu->cd.x86.r[X86_R_BP] - mode/8); |
| 4620 |
cpu->cd.x86.cursegment = X86_S_SS; |
| 4621 |
if (!x86_load(cpu, cpu->cd.x86.r[X86_R_BP], |
| 4622 |
&tmpword, mode/8)) { |
| 4623 |
fatal("TODO: load error inside" |
| 4624 |
" ENTER\n"); |
| 4625 |
cpu->running = 0; |
| 4626 |
return 0; |
| 4627 |
} |
| 4628 |
if (!x86_push(cpu, tmpword, mode)) { |
| 4629 |
fatal("TODO: push error inside" |
| 4630 |
" ENTER\n"); |
| 4631 |
cpu->running = 0; |
| 4632 |
return 0; |
| 4633 |
} |
| 4634 |
} |
| 4635 |
if (!x86_push(cpu, tmp_frame_ptr, mode)) |
| 4636 |
return 0; |
| 4637 |
} |
| 4638 |
cpu->cd.x86.r[X86_R_BP] = modify(cpu->cd.x86.r[X86_R_BP], |
| 4639 |
tmp_frame_ptr); |
| 4640 |
if (mode == 16) |
| 4641 |
cpu->cd.x86.r[X86_R_SP] = (cpu->cd.x86.r[X86_R_SP] & |
| 4642 |
~0xffff) | ((cpu->cd.x86.r[X86_R_SP] & 0xffff) |
| 4643 |
- imm); |
| 4644 |
else |
| 4645 |
cpu->cd.x86.r[X86_R_SP] -= imm; |
| 4646 |
} else if (op == 0xc9) { /* LEAVE */ |
| 4647 |
cpu->cd.x86.r[X86_R_SP] = cpu->cd.x86.r[X86_R_BP]; |
| 4648 |
if (!x86_pop(cpu, &tmp, mode)) { |
| 4649 |
fatal("TODO: pop error inside LEAVE\n"); |
| 4650 |
cpu->running = 0; |
| 4651 |
return 0; |
| 4652 |
} |
| 4653 |
cpu->cd.x86.r[X86_R_BP] = tmp; |
| 4654 |
} else if (op == 0xca || op == 0xcb) { /* RET far */ |
| 4655 |
uint64_t tmp2; |
| 4656 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 4657 |
if (op == 0xca) |
| 4658 |
imm = read_imm(&instr, &newpc, 16); |
| 4659 |
else |
| 4660 |
imm = 0; |
| 4661 |
if (!x86_pop(cpu, &tmp, mode)) |
| 4662 |
return 0; |
| 4663 |
if (!x86_pop(cpu, &tmp2, mode)) { |
| 4664 |
fatal("TODO: pop error inside RET\n"); |
| 4665 |
cpu->running = 0; |
| 4666 |
return 0; |
| 4667 |
} |
| 4668 |
cpu->cd.x86.r[X86_R_SP] = modify(cpu->cd.x86.r[X86_R_SP], |
| 4669 |
cpu->cd.x86.r[X86_R_SP] + imm); |
| 4670 |
reload_segment_descriptor(cpu, X86_S_CS, tmp2, &newpc); |
| 4671 |
if (cpu->cd.x86.tr == old_tr) |
| 4672 |
newpc = tmp; |
| 4673 |
} else if (op == 0xcc) { /* INT3 */ |
| 4674 |
cpu->pc = newpc; |
| 4675 |
return x86_interrupt(cpu, 3, 0); |
| 4676 |
} else if (op == 0xcd) { /* INT */ |
| 4677 |
imm = read_imm(&instr, &newpc, 8); |
| 4678 |
cpu->pc = newpc; |
| 4679 |
return x86_interrupt(cpu, imm, 0); |
| 4680 |
} else if (op == 0xcf) { /* IRET */ |
| 4681 |
uint64_t tmp2, tmp3; |
| 4682 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 4683 |
if (!x86_pop(cpu, &tmp, mode)) |
| 4684 |
return 0; |
| 4685 |
if (!x86_pop(cpu, &tmp2, mode)) |
| 4686 |
return 0; |
| 4687 |
if (!x86_pop(cpu, &tmp3, mode)) |
| 4688 |
return 0; |
| 4689 |
debug("{ iret to 0x%04x:0x%08x }\n", (int)tmp2,(int)tmp); |
| 4690 |
tmp2 &= 0xffff; |
| 4691 |
/* TODO: only affect some bits? */ |
| 4692 |
if (mode == 16) |
| 4693 |
cpu->cd.x86.rflags = (cpu->cd.x86.rflags & ~0xffff) |
| 4694 |
| (tmp3 & 0xffff); |
| 4695 |
else |
| 4696 |
cpu->cd.x86.rflags = tmp3; |
| 4697 |
/* |
| 4698 |
* In protected mode, if we're switching back from, say, an |
| 4699 |
* interrupt handler, then we should pop the old ss:esp too: |
| 4700 |
*/ |
| 4701 |
if (PROTECTED_MODE && (tmp2 & X86_PL_MASK) > |
| 4702 |
(cpu->cd.x86.s[X86_S_CS] & X86_PL_MASK)) { |
| 4703 |
uint64_t old_ss, old_esp; |
| 4704 |
if (!x86_pop(cpu, &old_esp, mode)) |
| 4705 |
return 0; |
| 4706 |
if (!x86_pop(cpu, &old_ss, mode)) |
| 4707 |
return 0; |
| 4708 |
old_ss &= 0xffff; |
| 4709 |
|
| 4710 |
printf(": : : BEFORE tmp=%016llx tmp2=%016llx tmp3=%016llx\n", |
| 4711 |
(long long)tmp, (long long)tmp2, (long long)tmp3); |
| 4712 |
/* x86_cpu_register_dump(cpu, 1, 1); */ |
| 4713 |
|
| 4714 |
reload_segment_descriptor(cpu, X86_S_SS, old_ss, |
| 4715 |
&newpc); |
| 4716 |
cpu->cd.x86.r[X86_R_SP] = old_esp; |
| 4717 |
|
| 4718 |
/* printf(": : : AFTER\n"); |
| 4719 |
x86_cpu_register_dump(cpu, 1, 1); */ |
| 4720 |
|
| 4721 |
/* AFTER popping ss, check that the pl of |
| 4722 |
the popped ss is the same as tmp2 (the new |
| 4723 |
pl in cs)! */ |
| 4724 |
if ((old_ss & X86_PL_MASK) != (tmp2 & X86_PL_MASK)) |
| 4725 |
fatal("WARNING: iret: popped ss' pl = %i," |
| 4726 |
" different from cs' pl = %i\n", |
| 4727 |
(int)(old_ss & X86_PL_MASK), |
| 4728 |
(int)(tmp2 & X86_PL_MASK)); |
| 4729 |
} |
| 4730 |
reload_segment_descriptor(cpu, X86_S_CS, tmp2, &newpc); |
| 4731 |
if (cpu->cd.x86.tr == old_tr) |
| 4732 |
newpc = tmp; |
| 4733 |
} else if (op >= 0xd0 && op <= 0xd3) { |
| 4734 |
int n = 1; |
| 4735 |
instr_orig = instr; |
| 4736 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 4737 |
op&1? 0 : MODRM_EIGHTBIT, &instr, &newpc, &op1, &op2); |
| 4738 |
if (!success) |
| 4739 |
return 0; |
| 4740 |
if (op >= 0xd2) |
| 4741 |
n = cpu->cd.x86.r[X86_R_CX]; |
| 4742 |
x86_shiftrotate(cpu, &op1, (*instr_orig >> 3) & 0x7, |
| 4743 |
n, op&1? mode : 8); |
| 4744 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 4745 |
op&1? 0 : MODRM_EIGHTBIT, &instr_orig, NULL, &op1, &op2); |
| 4746 |
if (!success) |
| 4747 |
return 0; |
| 4748 |
} else if (op == 0xd4) { /* AAM */ |
| 4749 |
int al = cpu->cd.x86.r[X86_R_AX] & 0xff; |
| 4750 |
/* al should be in the range 0..81 */ |
| 4751 |
int high; |
| 4752 |
imm = read_imm(&instr, &newpc, 8); |
| 4753 |
if (imm == 0) { |
| 4754 |
fatal("[ x86: \"aam 0\" ]\n"); |
| 4755 |
cpu->running = 0; |
| 4756 |
} else { |
| 4757 |
high = al / imm; |
| 4758 |
al %= imm; |
| 4759 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & |
| 4760 |
~0xffff) | al | ((high & 0xff) << 8); |
| 4761 |
x86_calc_flags(cpu, cpu->cd.x86.r[X86_R_AX], |
| 4762 |
0, 8, CALCFLAGS_OP_XOR); |
| 4763 |
} |
| 4764 |
} else if (op == 0xd5) { /* AAD */ |
| 4765 |
int al = cpu->cd.x86.r[X86_R_AX] & 0xff; |
| 4766 |
int ah = (cpu->cd.x86.r[X86_R_AX] >> 8) & 0xff; |
| 4767 |
imm = read_imm(&instr, &newpc, 8); |
| 4768 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & ~0xffff) |
| 4769 |
| ((al + 10*ah) & 0xff); |
| 4770 |
x86_calc_flags(cpu, cpu->cd.x86.r[X86_R_AX], |
| 4771 |
0, 8, CALCFLAGS_OP_XOR); |
| 4772 |
} else if (op == 0xd7) { /* XLAT */ |
| 4773 |
uint64_t addr = cpu->cd.x86.r[X86_R_BX]; |
| 4774 |
if (mode == 16) |
| 4775 |
addr &= 0xffff; |
| 4776 |
addr += (cpu->cd.x86.r[X86_R_AX] & 0xff); |
| 4777 |
if (!x86_load(cpu, addr, &tmp, 1)) |
| 4778 |
return 0; |
| 4779 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & ~0xff) |
| 4780 |
| (tmp & 0xff); |
| 4781 |
} else if (op == 0xd9) { |
| 4782 |
int subop = (*instr >> 3) & 7; |
| 4783 |
imm = *instr; |
| 4784 |
if (subop == 5) { /* FLDCW mem16 */ |
| 4785 |
if (!modrm(cpu, MODRM_READ, 16, mode67, 0, &instr, |
| 4786 |
&newpc, &op1, &op2)) |
| 4787 |
return 0; |
| 4788 |
cpu->cd.x86.fpu_cw = op1; |
| 4789 |
} else if (subop == 7) { /* FSTCW mem16 */ |
| 4790 |
op1 = cpu->cd.x86.fpu_cw; |
| 4791 |
if (!modrm(cpu, MODRM_WRITE_RM, 16, mode67, 0, &instr, |
| 4792 |
&newpc, &op1, &op2)) |
| 4793 |
return 0; |
| 4794 |
} else { |
| 4795 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4796 |
quiet_mode = 0; |
| 4797 |
x86_cpu_disassemble_instr(cpu, really_orig_instr, |
| 4798 |
1 | omode, 0, 0); |
| 4799 |
cpu->running = 0; |
| 4800 |
} |
| 4801 |
} else if (op == 0xdb) { |
| 4802 |
imm = *instr; |
| 4803 |
if (imm == 0xe2) { /* FCLEX */ |
| 4804 |
read_imm(&instr, &newpc, 8); |
| 4805 |
/* TODO: actually clear exceptions */ |
| 4806 |
} else if (imm == 0xe3) { /* FINIT */ |
| 4807 |
read_imm(&instr, &newpc, 8); |
| 4808 |
/* TODO: actually init? */ |
| 4809 |
} else if (imm == 0xe4) { /* FSETPM */ |
| 4810 |
read_imm(&instr, &newpc, 8); |
| 4811 |
} else { |
| 4812 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4813 |
quiet_mode = 0; |
| 4814 |
x86_cpu_disassemble_instr(cpu, really_orig_instr, |
| 4815 |
1 | omode, 0, 0); |
| 4816 |
cpu->running = 0; |
| 4817 |
} |
| 4818 |
} else if (op == 0xdd) { |
| 4819 |
int subop = (*instr >> 3) & 7; |
| 4820 |
imm = *instr; |
| 4821 |
if (subop == 7) { /* FSTSW mem16 */ |
| 4822 |
op1 = cpu->cd.x86.fpu_sw; |
| 4823 |
if (!modrm(cpu, MODRM_WRITE_RM, 16, mode67, 0, &instr, |
| 4824 |
&newpc, &op1, &op2)) |
| 4825 |
return 0; |
| 4826 |
} else { |
| 4827 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4828 |
quiet_mode = 0; |
| 4829 |
x86_cpu_disassemble_instr(cpu, really_orig_instr, |
| 4830 |
1 | omode, 0, 0); |
| 4831 |
cpu->running = 0; |
| 4832 |
} |
| 4833 |
} else if (op == 0xdf) { |
| 4834 |
imm = *instr; |
| 4835 |
if (imm == 0xe0) { /* FSTSW */ |
| 4836 |
read_imm(&instr, &newpc, 8); |
| 4837 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & |
| 4838 |
~0xffff) | (cpu->cd.x86.fpu_sw & 0xffff); |
| 4839 |
} else { |
| 4840 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 4841 |
quiet_mode = 0; |
| 4842 |
x86_cpu_disassemble_instr(cpu, really_orig_instr, |
| 4843 |
1 | omode, 0, 0); |
| 4844 |
cpu->running = 0; |
| 4845 |
} |
| 4846 |
} else if (op == 0xe4 || op == 0xe5 /* IN imm,AL or AX/EAX */ |
| 4847 |
|| op == 0x6c || op == 0x6d) { /* INSB or INSW/INSD */ |
| 4848 |
unsigned char databuf[8]; |
| 4849 |
int port_nr, ins = 0, len = 1, dir = 1; |
| 4850 |
if (op == 0x6c || op == 0x6d) { |
| 4851 |
port_nr = cpu->cd.x86.r[X86_R_DX] & 0xffff; |
| 4852 |
ins = 1; |
| 4853 |
} else |
| 4854 |
port_nr = read_imm(&instr, &newpc, 8); |
| 4855 |
if (op & 1) |
| 4856 |
len = mode/8; |
| 4857 |
if (cpu->cd.x86.rflags & X86_FLAGS_DF) |
| 4858 |
dir = -1; |
| 4859 |
do { |
| 4860 |
cpu->memory_rw(cpu, cpu->mem, X86_IO_BASE+port_nr, |
| 4861 |
&databuf[0], len, MEM_READ, CACHE_NONE | PHYSICAL); |
| 4862 |
|
| 4863 |
if (ins) { |
| 4864 |
uint64_t addr = cpu->cd.x86.r[X86_R_DI]; |
| 4865 |
uint32_t value = databuf[0] + (databuf[1] << 8) |
| 4866 |
+ (databuf[2] << 16) + (databuf[3] << 24); |
| 4867 |
if (mode67 == 16) |
| 4868 |
addr &= 0xffff; |
| 4869 |
if (mode67 == 32) |
| 4870 |
addr &= 0xffffffff; |
| 4871 |
cpu->cd.x86.cursegment = X86_S_ES; |
| 4872 |
if (!x86_store(cpu, addr, value, len)) |
| 4873 |
return 0; |
| 4874 |
|
| 4875 |
/* Advance (e)di: */ |
| 4876 |
if (mode67 == 16) |
| 4877 |
cpu->cd.x86.r[X86_R_DI] = |
| 4878 |
(cpu->cd.x86.r[X86_R_DI] & ~0xffff) |
| 4879 |
| ((cpu->cd.x86.r[X86_R_DI]+len*dir) |
| 4880 |
& 0xffff); |
| 4881 |
else { |
| 4882 |
cpu->cd.x86.r[X86_R_DI] += len*dir; |
| 4883 |
if (mode67 == 32) |
| 4884 |
cpu->cd.x86.r[X86_R_DI] &= |
| 4885 |
0xffffffff; |
| 4886 |
} |
| 4887 |
|
| 4888 |
if (rep) { |
| 4889 |
/* Decrement ecx: */ |
| 4890 |
if (mode67 == 16) |
| 4891 |
cpu->cd.x86.r[X86_R_CX] = |
| 4892 |
(cpu->cd.x86.r[X86_R_CX] & |
| 4893 |
~0xffff) | ((cpu->cd.x86.r[ |
| 4894 |
X86_R_CX] - 1) & 0xffff); |
| 4895 |
else { |
| 4896 |
cpu->cd.x86.r[X86_R_CX] --; |
| 4897 |
cpu->cd.x86.r[X86_R_CX] &= |
| 4898 |
0xffffffff; |
| 4899 |
} |
| 4900 |
if (mode67 == 16 && (cpu->cd.x86.r[ |
| 4901 |
X86_R_CX] & 0xffff) == 0) |
| 4902 |
rep = 0; |
| 4903 |
if (mode67 != 16 && |
| 4904 |
cpu->cd.x86.r[X86_R_CX] == 0) |
| 4905 |
rep = 0; |
| 4906 |
} |
| 4907 |
} else { |
| 4908 |
if (len == 1) |
| 4909 |
cpu->cd.x86.r[X86_R_AX] = |
| 4910 |
(cpu->cd.x86.r[X86_R_AX] & |
| 4911 |
~0xff) | databuf[0]; |
| 4912 |
else if (len == 2) |
| 4913 |
cpu->cd.x86.r[X86_R_AX] = |
| 4914 |
(cpu->cd.x86.r[X86_R_AX] & ~0xffff) |
| 4915 |
| databuf[0] | (databuf[1] << 8); |
| 4916 |
else if (len == 4) |
| 4917 |
cpu->cd.x86.r[X86_R_AX] = databuf[0] | |
| 4918 |
(databuf[1] << 8) | (databuf[2] |
| 4919 |
<< 16) | (databuf[3] << 24); |
| 4920 |
} |
| 4921 |
} while (rep); |
| 4922 |
} else if (op == 0xe6 || op == 0xe7 /* OUT imm,AL or AX/EAX */ |
| 4923 |
|| op == 0x6e || op == 0x6f) { /* OUTSB or OUTSW/OUTSD */ |
| 4924 |
unsigned char databuf[8]; |
| 4925 |
int port_nr, outs = 0, len = 1, dir = 1; |
| 4926 |
if (op == 0x6e || op == 0x6f) { |
| 4927 |
port_nr = cpu->cd.x86.r[X86_R_DX] & 0xffff; |
| 4928 |
outs = 1; |
| 4929 |
} else |
| 4930 |
port_nr = read_imm(&instr, &newpc, 8); |
| 4931 |
if (op & 1) |
| 4932 |
len = mode/8; |
| 4933 |
if (cpu->cd.x86.rflags & X86_FLAGS_DF) |
| 4934 |
dir = -1; |
| 4935 |
do { |
| 4936 |
if (outs) { |
| 4937 |
int i; |
| 4938 |
uint64_t addr = cpu->cd.x86.r[X86_R_DI]; |
| 4939 |
uint64_t value; |
| 4940 |
if (mode67 == 16) |
| 4941 |
addr &= 0xffff; |
| 4942 |
if (mode67 == 32) |
| 4943 |
addr &= 0xffffffff; |
| 4944 |
cpu->cd.x86.cursegment = X86_S_ES; |
| 4945 |
if (!x86_load(cpu, addr, &value, len)) |
| 4946 |
return 0; |
| 4947 |
|
| 4948 |
/* Advance (e)di: */ |
| 4949 |
if (mode67 == 16) |
| 4950 |
cpu->cd.x86.r[X86_R_DI] = |
| 4951 |
(cpu->cd.x86.r[X86_R_DI] & ~0xffff) |
| 4952 |
| ((cpu->cd.x86.r[X86_R_DI]+len*dir) |
| 4953 |
& 0xffff); |
| 4954 |
else { |
| 4955 |
cpu->cd.x86.r[X86_R_DI] += len*dir; |
| 4956 |
if (mode67 == 32) |
| 4957 |
cpu->cd.x86.r[X86_R_DI] &= |
| 4958 |
0xffffffff; |
| 4959 |
} |
| 4960 |
|
| 4961 |
for (i=0; i<8; i++) |
| 4962 |
databuf[i] = value >> (i*8); |
| 4963 |
|
| 4964 |
if (rep) { |
| 4965 |
/* Decrement ecx: */ |
| 4966 |
if (mode67 == 16) |
| 4967 |
cpu->cd.x86.r[X86_R_CX] = |
| 4968 |
(cpu->cd.x86.r[X86_R_CX] & |
| 4969 |
~0xffff) | ((cpu->cd.x86.r[ |
| 4970 |
X86_R_CX] - 1) & 0xffff); |
| 4971 |
else { |
| 4972 |
cpu->cd.x86.r[X86_R_CX] --; |
| 4973 |
cpu->cd.x86.r[X86_R_CX] &= |
| 4974 |
0xffffffff; |
| 4975 |
} |
| 4976 |
if (mode67 == 16 && (cpu->cd.x86.r[ |
| 4977 |
X86_R_CX] & 0xffff) == 0) |
| 4978 |
rep = 0; |
| 4979 |
if (mode67 != 16 && |
| 4980 |
cpu->cd.x86.r[X86_R_CX] == 0) |
| 4981 |
rep = 0; |
| 4982 |
} |
| 4983 |
} else { |
| 4984 |
int i; |
| 4985 |
for (i=0; i<8; i++) |
| 4986 |
databuf[i] = cpu->cd.x86.r[X86_R_AX] |
| 4987 |
>> (i*8); |
| 4988 |
} |
| 4989 |
|
| 4990 |
cpu->memory_rw(cpu, cpu->mem, X86_IO_BASE+port_nr, |
| 4991 |
&databuf[0], len, MEM_WRITE, CACHE_NONE | PHYSICAL); |
| 4992 |
} while (rep); |
| 4993 |
} else if (op == 0xe8 || op == 0xe9) { /* CALL/JMP near */ |
| 4994 |
imm = read_imm(&instr, &newpc, mode); |
| 4995 |
if (mode == 16) |
| 4996 |
imm = (int16_t)imm; |
| 4997 |
if (mode == 32) |
| 4998 |
imm = (int32_t)imm; |
| 4999 |
if (op == 0xe8) { |
| 5000 |
if (!x86_push(cpu, newpc, mode)) |
| 5001 |
return 0; |
| 5002 |
} |
| 5003 |
newpc += imm; |
| 5004 |
} else if (op == 0xea) { /* JMP seg:ofs */ |
| 5005 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 5006 |
imm = read_imm(&instr, &newpc, mode); |
| 5007 |
imm2 = read_imm(&instr, &newpc, 16); |
| 5008 |
reload_segment_descriptor(cpu, X86_S_CS, imm2, &newpc); |
| 5009 |
if (cpu->cd.x86.tr == old_tr) |
| 5010 |
newpc = imm; |
| 5011 |
} else if ((op >= 0xe0 && op <= 0xe3) || op == 0xeb) { /* LOOP,JMP */ |
| 5012 |
int perform_jump = 0; |
| 5013 |
imm = read_imm(&instr, &newpc, 8); |
| 5014 |
switch (op) { |
| 5015 |
case 0xe0: /* loopnz */ |
| 5016 |
case 0xe1: /* loopz */ |
| 5017 |
case 0xe2: /* loop */ |
| 5018 |
/* NOTE: address size attribute, not operand size? */ |
| 5019 |
if (mode67 == 16) |
| 5020 |
cpu->cd.x86.r[X86_R_CX] = (~0xffff & |
| 5021 |
cpu->cd.x86.r[X86_R_CX]) | |
| 5022 |
((cpu->cd.x86.r[X86_R_CX] - 1) & 0xffff); |
| 5023 |
else |
| 5024 |
cpu->cd.x86.r[X86_R_CX] --; |
| 5025 |
if (mode67 == 16 && (cpu->cd.x86.r[X86_R_CX] & |
| 5026 |
0xffff) != 0) |
| 5027 |
perform_jump = 1; |
| 5028 |
if (mode67 == 32 && cpu->cd.x86.r[X86_R_CX] != 0) |
| 5029 |
perform_jump = 1; |
| 5030 |
if (op == 0xe0 && cpu->cd.x86.rflags & X86_FLAGS_ZF) |
| 5031 |
perform_jump = 0; |
| 5032 |
if (op == 0xe1 && (!cpu->cd.x86.rflags & X86_FLAGS_ZF)) |
| 5033 |
perform_jump = 0; |
| 5034 |
break; |
| 5035 |
case 0xe3: /* jcxz/jecxz */ |
| 5036 |
if (mode67 == 16 && (cpu->cd.x86.r[X86_R_CX] & 0xffff) |
| 5037 |
== 0) |
| 5038 |
perform_jump = 1; |
| 5039 |
if (mode67 != 16 && (cpu->cd.x86.r[X86_R_CX] & |
| 5040 |
0xffffffffULL) == 0) |
| 5041 |
perform_jump = 1; |
| 5042 |
break; |
| 5043 |
case 0xeb: /* jmp */ |
| 5044 |
perform_jump = 1; |
| 5045 |
break; |
| 5046 |
} |
| 5047 |
if (perform_jump) |
| 5048 |
newpc += (signed char)imm; |
| 5049 |
} else if (op == 0xec || op == 0xed) { /* IN DX,AL or AX/EAX */ |
| 5050 |
unsigned char databuf[8]; |
| 5051 |
cpu->memory_rw(cpu, cpu->mem, X86_IO_BASE + |
| 5052 |
(cpu->cd.x86.r[X86_R_DX] & 0xffff), &databuf[0], |
| 5053 |
op == 0xec? 1 : (mode/8), MEM_READ, CACHE_NONE | PHYSICAL); |
| 5054 |
if (op == 0xec) |
| 5055 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & |
| 5056 |
~0xff) | databuf[0]; |
| 5057 |
else if (op == 0xed && mode == 16) |
| 5058 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[X86_R_AX] & |
| 5059 |
~0xffff) | databuf[0] | (databuf[1] << 8); |
| 5060 |
else if (op == 0xed && mode == 32) |
| 5061 |
cpu->cd.x86.r[X86_R_AX] = databuf[0] | |
| 5062 |
(databuf[1] << 8) | (databuf[2] << 16) | |
| 5063 |
(databuf[3] << 24); |
| 5064 |
} else if (op == 0xee || op == 0xef) { /* OUT DX,AL or AX/EAX */ |
| 5065 |
unsigned char databuf[8]; |
| 5066 |
databuf[0] = cpu->cd.x86.r[X86_R_AX]; |
| 5067 |
if (op == 0xef) { |
| 5068 |
databuf[1] = cpu->cd.x86.r[X86_R_AX] >> 8; |
| 5069 |
if (mode >= 32) { |
| 5070 |
databuf[2] = cpu->cd.x86.r[X86_R_AX] >> 16; |
| 5071 |
databuf[3] = cpu->cd.x86.r[X86_R_AX] >> 24; |
| 5072 |
} |
| 5073 |
} |
| 5074 |
cpu->memory_rw(cpu, cpu->mem, X86_IO_BASE + |
| 5075 |
(cpu->cd.x86.r[X86_R_DX] & 0xffff), &databuf[0], |
| 5076 |
op == 0xee? 1 : (mode/8), MEM_WRITE, CACHE_NONE | PHYSICAL); |
| 5077 |
} else if (op == 0xf4) { /* HLT */ |
| 5078 |
cpu->cd.x86.halted = 1; |
| 5079 |
} else if (op == 0xf5) { /* CMC */ |
| 5080 |
cpu->cd.x86.rflags ^= X86_FLAGS_CF; |
| 5081 |
} else if (op == 0xf8) { /* CLC */ |
| 5082 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 5083 |
} else if (op == 0xf9) { /* STC */ |
| 5084 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 5085 |
} else if (op == 0xfa) { /* CLI */ |
| 5086 |
cpu->cd.x86.rflags &= ~X86_FLAGS_IF; |
| 5087 |
} else if (op == 0xfb) { /* STI */ |
| 5088 |
cpu->cd.x86.rflags |= X86_FLAGS_IF; |
| 5089 |
} else if (op == 0xfc) { /* CLD */ |
| 5090 |
cpu->cd.x86.rflags &= ~X86_FLAGS_DF; |
| 5091 |
} else if (op == 0xfd) { /* STD */ |
| 5092 |
cpu->cd.x86.rflags |= X86_FLAGS_DF; |
| 5093 |
} else if (op == 0xf6 || op == 0xf7) { /* MUL, DIV etc */ |
| 5094 |
uint64_t res; |
| 5095 |
int unsigned_op = 1; |
| 5096 |
switch ((*instr >> 3) & 0x7) { |
| 5097 |
case 0: /* test */ |
| 5098 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5099 |
op == 0xf6? MODRM_EIGHTBIT : 0, &instr, |
| 5100 |
&newpc, &op1, &op2); |
| 5101 |
if (!success) |
| 5102 |
return 0; |
| 5103 |
op2 = read_imm(&instr, &newpc, op==0xf6? 8 : mode); |
| 5104 |
op1 &= op2; |
| 5105 |
x86_calc_flags(cpu, op1, 0, op==0xf6? 8 : mode, |
| 5106 |
CALCFLAGS_OP_XOR); |
| 5107 |
break; |
| 5108 |
case 2: /* not */ |
| 5109 |
case 3: /* neg */ |
| 5110 |
instr_orig = instr; |
| 5111 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5112 |
op == 0xf6? MODRM_EIGHTBIT : 0, &instr, |
| 5113 |
&newpc, &op1, &op2); |
| 5114 |
if (!success) |
| 5115 |
return 0; |
| 5116 |
switch ((*instr_orig >> 3) & 0x7) { |
| 5117 |
case 2: op1 ^= 0xffffffffffffffffULL; break; |
| 5118 |
case 3: x86_calc_flags(cpu, 0, op1, |
| 5119 |
op == 0xf6? 8 : mode, CALCFLAGS_OP_SUB); |
| 5120 |
op1 = 0 - op1; |
| 5121 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 5122 |
if (op1 != 0) |
| 5123 |
cpu->cd.x86.rflags |= X86_FLAGS_CF; |
| 5124 |
break; |
| 5125 |
} |
| 5126 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 5127 |
op == 0xf6? MODRM_EIGHTBIT : 0, &instr_orig, |
| 5128 |
NULL, &op1, &op2); |
| 5129 |
if (!success) |
| 5130 |
return 0; |
| 5131 |
break; |
| 5132 |
case 5: /* imul */ |
| 5133 |
unsigned_op = 0; |
| 5134 |
case 4: /* mul */ |
| 5135 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5136 |
op == 0xf6? MODRM_EIGHTBIT : 0, &instr, |
| 5137 |
&newpc, &op1, &op2); |
| 5138 |
if (!success) |
| 5139 |
return 0; |
| 5140 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 5141 |
cpu->cd.x86.rflags &= ~X86_FLAGS_OF; |
| 5142 |
if (op == 0xf6) { |
| 5143 |
if (unsigned_op) |
| 5144 |
res = (cpu->cd.x86.r[X86_R_AX] & 0xff) |
| 5145 |
* (op1 & 0xff); |
| 5146 |
else |
| 5147 |
res = (int16_t)(signed char)(cpu->cd. |
| 5148 |
x86.r[X86_R_AX] & 0xff) * (int16_t) |
| 5149 |
(signed char)(op1 & 0xff); |
| 5150 |
cpu->cd.x86.r[X86_R_AX] = (cpu->cd.x86.r[ |
| 5151 |
X86_R_AX] & ~0xffff) | (res & 0xffff); |
| 5152 |
if ((res & 0xffff) >= 0x100) |
| 5153 |
cpu->cd.x86.rflags |= X86_FLAGS_CF |
| 5154 |
| X86_FLAGS_OF; |
| 5155 |
} else if (mode == 16) { |
| 5156 |
if (unsigned_op) |
| 5157 |
res = (cpu->cd.x86.r[X86_R_AX] & 0xffff) |
| 5158 |
* (op1 & 0xffff); |
| 5159 |
else |
| 5160 |
res = (int32_t)(int16_t)(cpu->cd.x86.r[ |
| 5161 |
X86_R_AX] & 0xffff) * (int32_t) |
| 5162 |
(int16_t)(op1 & 0xffff); |
| 5163 |
cpu->cd.x86.r[X86_R_AX] = modify(cpu-> |
| 5164 |
cd.x86.r[X86_R_AX], res & 0xffff); |
| 5165 |
cpu->cd.x86.r[X86_R_DX] = modify(cpu->cd.x86 |
| 5166 |
.r[X86_R_DX], (res>>16) & 0xffff); |
| 5167 |
if ((res & 0xffffffff) >= 0x10000) |
| 5168 |
cpu->cd.x86.rflags |= X86_FLAGS_CF |
| 5169 |
| X86_FLAGS_OF; |
| 5170 |
} else if (mode == 32) { |
| 5171 |
if (unsigned_op) |
| 5172 |
res = (cpu->cd.x86.r[X86_R_AX] & |
| 5173 |
0xffffffff) * (op1 & 0xffffffff); |
| 5174 |
else |
| 5175 |
res = (int64_t)(int32_t)(cpu->cd.x86.r[ |
| 5176 |
X86_R_AX] & 0xffffffff) * (int64_t) |
| 5177 |
(int32_t)(op1 & 0xffffffff); |
| 5178 |
cpu->cd.x86.r[X86_R_AX] = res & 0xffffffff; |
| 5179 |
cpu->cd.x86.r[X86_R_DX] = (res >> 32) & |
| 5180 |
0xffffffff; |
| 5181 |
if (res >= 0x100000000ULL) |
| 5182 |
cpu->cd.x86.rflags |= X86_FLAGS_CF |
| 5183 |
| X86_FLAGS_OF; |
| 5184 |
} |
| 5185 |
break; |
| 5186 |
case 7: /* idiv */ |
| 5187 |
unsigned_op = 0; |
| 5188 |
case 6: /* div */ |
| 5189 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5190 |
op == 0xf6? MODRM_EIGHTBIT : 0, &instr, |
| 5191 |
&newpc, &op1, &op2); |
| 5192 |
if (!success) |
| 5193 |
return 0; |
| 5194 |
if (op1 == 0) { |
| 5195 |
fatal("TODO: division by zero\n"); |
| 5196 |
cpu->running = 0; |
| 5197 |
break; |
| 5198 |
} |
| 5199 |
if (op == 0xf6) { |
| 5200 |
int al, ah; |
| 5201 |
if (unsigned_op) { |
| 5202 |
al = (cpu->cd.x86.r[X86_R_AX] & |
| 5203 |
0xffff) / op1; |
| 5204 |
ah = (cpu->cd.x86.r[X86_R_AX] & |
| 5205 |
0xffff) % op1; |
| 5206 |
} else { |
| 5207 |
al = (int16_t)(cpu->cd.x86.r[ |
| 5208 |
X86_R_AX] & 0xffff) / (int16_t)op1; |
| 5209 |
ah = (int16_t)(cpu->cd.x86.r[ |
| 5210 |
X86_R_AX] & 0xffff) % (int16_t)op1; |
| 5211 |
} |
| 5212 |
cpu->cd.x86.r[X86_R_AX] = modify( |
| 5213 |
cpu->cd.x86.r[X86_R_AX], (ah<<8) + al); |
| 5214 |
} else if (mode == 16) { |
| 5215 |
uint64_t a = (cpu->cd.x86.r[X86_R_AX] & 0xffff) |
| 5216 |
+ ((cpu->cd.x86.r[X86_R_DX] & 0xffff)<<16); |
| 5217 |
uint32_t ax, dx; |
| 5218 |
if (unsigned_op) { |
| 5219 |
ax = a / op1, dx = a % op1; |
| 5220 |
} else { |
| 5221 |
ax = (int32_t)a / (int32_t)op1; |
| 5222 |
dx = (int32_t)a % (int32_t)op1; |
| 5223 |
} |
| 5224 |
cpu->cd.x86.r[X86_R_AX] = modify( |
| 5225 |
cpu->cd.x86.r[X86_R_AX], ax); |
| 5226 |
cpu->cd.x86.r[X86_R_DX] = modify( |
| 5227 |
cpu->cd.x86.r[X86_R_DX], dx); |
| 5228 |
} else if (mode == 32) { |
| 5229 |
uint64_t a = (cpu->cd.x86.r[X86_R_AX] & |
| 5230 |
0xffffffffULL) + ((cpu->cd.x86.r[ |
| 5231 |
X86_R_DX] & 0xffffffffULL) << 32); |
| 5232 |
uint32_t eax, edx; |
| 5233 |
if (unsigned_op) { |
| 5234 |
eax = (uint64_t)a / (uint32_t)op1; |
| 5235 |
edx = (uint64_t)a % (uint32_t)op1; |
| 5236 |
} else { |
| 5237 |
eax = (int64_t)a / (int32_t)op1; |
| 5238 |
edx = (int64_t)a % (int32_t)op1; |
| 5239 |
} |
| 5240 |
cpu->cd.x86.r[X86_R_AX] = eax; |
| 5241 |
cpu->cd.x86.r[X86_R_DX] = edx; |
| 5242 |
} |
| 5243 |
break; |
| 5244 |
default: |
| 5245 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 5246 |
quiet_mode = 0; |
| 5247 |
x86_cpu_disassemble_instr(cpu, |
| 5248 |
really_orig_instr, 1|omode, 0, 0); |
| 5249 |
cpu->running = 0; |
| 5250 |
} |
| 5251 |
} else if (op == 0xfe || op == 0xff) { /* INC, DEC etc */ |
| 5252 |
int old_cf; |
| 5253 |
switch ((*instr >> 3) & 0x7) { |
| 5254 |
case 0: |
| 5255 |
case 1: instr_orig = instr; |
| 5256 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5257 |
op == 0xfe? MODRM_EIGHTBIT : 0, &instr, |
| 5258 |
&newpc, &op1, &op2); |
| 5259 |
if (!success) |
| 5260 |
return 0; |
| 5261 |
old_cf = cpu->cd.x86.rflags & X86_FLAGS_CF; |
| 5262 |
switch ((*instr_orig >> 3) & 0x7) { |
| 5263 |
case 0: x86_calc_flags(cpu, op1, 1, op==0xfe? 8 : mode, |
| 5264 |
CALCFLAGS_OP_ADD); |
| 5265 |
op1 ++; |
| 5266 |
break; /* inc */ |
| 5267 |
case 1: x86_calc_flags(cpu, op1, 1, op==0xfe? 8 : mode, |
| 5268 |
CALCFLAGS_OP_SUB); |
| 5269 |
op1 --; |
| 5270 |
break; /* dec */ |
| 5271 |
} |
| 5272 |
success = modrm(cpu, MODRM_WRITE_RM, mode, mode67, |
| 5273 |
op == 0xfe? MODRM_EIGHTBIT : 0, &instr_orig, |
| 5274 |
NULL, &op1, &op2); |
| 5275 |
if (!success) |
| 5276 |
return 0; |
| 5277 |
/* preserve CF: */ |
| 5278 |
cpu->cd.x86.rflags &= ~X86_FLAGS_CF; |
| 5279 |
cpu->cd.x86.rflags |= old_cf; |
| 5280 |
break; |
| 5281 |
case 2: if (op == 0xfe) { |
| 5282 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, |
| 5283 |
*instr); |
| 5284 |
quiet_mode = 0; |
| 5285 |
x86_cpu_disassemble_instr(cpu, |
| 5286 |
really_orig_instr, 1|omode, 0, 0); |
| 5287 |
cpu->running = 0; |
| 5288 |
} else { |
| 5289 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5290 |
0, &instr, &newpc, &op1, &op2); |
| 5291 |
if (!success) |
| 5292 |
return 0; |
| 5293 |
/* Push return [E]IP */ |
| 5294 |
if (!x86_push(cpu, newpc, mode)) |
| 5295 |
return 0; |
| 5296 |
newpc = op1; |
| 5297 |
} |
| 5298 |
break; |
| 5299 |
case 3: if (op == 0xfe) { |
| 5300 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, |
| 5301 |
*instr); |
| 5302 |
quiet_mode = 0; |
| 5303 |
x86_cpu_disassemble_instr(cpu, |
| 5304 |
really_orig_instr, 1|omode, 0, 0); |
| 5305 |
cpu->running = 0; |
| 5306 |
} else { |
| 5307 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 5308 |
uint64_t tmp1, tmp2; |
| 5309 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5310 |
MODRM_JUST_GET_ADDR, &instr, |
| 5311 |
&newpc, &op1, &op2); |
| 5312 |
if (!success) |
| 5313 |
return 0; |
| 5314 |
/* Load a far address from op1: */ |
| 5315 |
if (!x86_load(cpu, op1, &tmp1, mode/8)) |
| 5316 |
return 0; |
| 5317 |
if (!x86_load(cpu, op1 + (mode/8), &tmp2, 2)) |
| 5318 |
return 0; |
| 5319 |
/* Push return CS:[E]IP */ |
| 5320 |
if (!x86_push(cpu, cpu->cd.x86.s[X86_S_CS], |
| 5321 |
mode)) |
| 5322 |
return 0; |
| 5323 |
if (!x86_push(cpu, newpc, mode)) { |
| 5324 |
fatal("TODO: push failed, call " |
| 5325 |
"far indirect?\n"); |
| 5326 |
cpu->running = 0; |
| 5327 |
return 0; |
| 5328 |
} |
| 5329 |
reload_segment_descriptor(cpu, X86_S_CS, |
| 5330 |
tmp2, &newpc); |
| 5331 |
if (cpu->cd.x86.tr == old_tr) |
| 5332 |
newpc = tmp1; |
| 5333 |
} |
| 5334 |
break; |
| 5335 |
case 4: if (op == 0xfe) { |
| 5336 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, |
| 5337 |
*instr); |
| 5338 |
quiet_mode = 0; |
| 5339 |
x86_cpu_disassemble_instr(cpu, |
| 5340 |
really_orig_instr, 1|omode, 0, 0); |
| 5341 |
cpu->running = 0; |
| 5342 |
} else { |
| 5343 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5344 |
0, &instr, &newpc, &op1, &op2); |
| 5345 |
if (!success) |
| 5346 |
return 0; |
| 5347 |
newpc = op1; |
| 5348 |
} |
| 5349 |
break; |
| 5350 |
case 5: if (op == 0xfe) { |
| 5351 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, |
| 5352 |
*instr); |
| 5353 |
quiet_mode = 0; |
| 5354 |
x86_cpu_disassemble_instr(cpu, |
| 5355 |
really_orig_instr, 1|omode, 0, 0); |
| 5356 |
cpu->running = 0; |
| 5357 |
} else { |
| 5358 |
uint16_t old_tr = cpu->cd.x86.tr; |
| 5359 |
uint64_t tmp1, tmp2; |
| 5360 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5361 |
MODRM_JUST_GET_ADDR, &instr, |
| 5362 |
&newpc, &op1, &op2); |
| 5363 |
if (!success) |
| 5364 |
return 0; |
| 5365 |
/* Load a far address from op1: */ |
| 5366 |
if (!x86_load(cpu, op1, &tmp1, mode/8)) |
| 5367 |
return 0; |
| 5368 |
if (!x86_load(cpu, op1 + (mode/8), &tmp2, 2)) |
| 5369 |
return 0; |
| 5370 |
reload_segment_descriptor(cpu, X86_S_CS, |
| 5371 |
tmp2, &newpc); |
| 5372 |
if (cpu->cd.x86.tr == old_tr) |
| 5373 |
newpc = tmp1; |
| 5374 |
} |
| 5375 |
break; |
| 5376 |
case 6: if (op == 0xfe) { |
| 5377 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, |
| 5378 |
*instr); |
| 5379 |
quiet_mode = 0; |
| 5380 |
x86_cpu_disassemble_instr(cpu, |
| 5381 |
really_orig_instr, 1|omode, 0, 0); |
| 5382 |
cpu->running = 0; |
| 5383 |
} else { |
| 5384 |
instr_orig = instr; |
| 5385 |
success = modrm(cpu, MODRM_READ, mode, mode67, |
| 5386 |
0, &instr, &newpc, &op1, &op2); |
| 5387 |
if (!success) |
| 5388 |
return 0; |
| 5389 |
if (!x86_push(cpu, op1, mode)) |
| 5390 |
return 0; |
| 5391 |
} |
| 5392 |
break; |
| 5393 |
default: |
| 5394 |
fatal("UNIMPLEMENTED 0x%02x,0x%02x\n", op, *instr); |
| 5395 |
quiet_mode = 0; |
| 5396 |
x86_cpu_disassemble_instr(cpu, |
| 5397 |
really_orig_instr, 1|omode, 0, 0); |
| 5398 |
cpu->running = 0; |
| 5399 |
} |
| 5400 |
} else { |
| 5401 |
fatal("x86_cpu_run_instr(): unimplemented opcode 0x%02x" |
| 5402 |
" at ", op); print_csip(cpu); fatal("\n"); |
| 5403 |
quiet_mode = 0; |
| 5404 |
x86_cpu_disassemble_instr(cpu, |
| 5405 |
really_orig_instr, 1|omode, 0, 0); |
| 5406 |
cpu->running = 0; |
| 5407 |
return 0; |
| 5408 |
} |
| 5409 |
|
| 5410 |
/* Wrap-around and update [E]IP: */ |
| 5411 |
cpu->pc = newpc & (((uint64_t)1 << (cpu->cd.x86.descr_cache[ |
| 5412 |
X86_S_CS].default_op_size)) - 1); |
| 5413 |
|
| 5414 |
if (trap_flag_was_set) { |
| 5415 |
if (REAL_MODE) { |
| 5416 |
x86_interrupt(cpu, 1, 0); |
| 5417 |
} else { |
| 5418 |
fatal("TRAP flag in protected mode?\n"); |
| 5419 |
cpu->running = 0; |
| 5420 |
} |
| 5421 |
} |
| 5422 |
|
| 5423 |
return 1; |
| 5424 |
} |
| 5425 |
|
| 5426 |
|
| 5427 |
#define CPU_RUN x86_cpu_run |
| 5428 |
#define CPU_RINSTR x86_cpu_run_instr |
| 5429 |
#define CPU_RUN_X86 |
| 5430 |
#include "cpu_run.c" |
| 5431 |
#undef CPU_RINSTR |
| 5432 |
#undef CPU_RUN_X86 |
| 5433 |
#undef CPU_RUN |
| 5434 |
|
| 5435 |
|
| 5436 |
/* |
| 5437 |
* x86_cpu_family_init(): |
| 5438 |
* |
| 5439 |
* Fill in the cpu_family struct for x86. |
| 5440 |
*/ |
| 5441 |
int x86_cpu_family_init(struct cpu_family *fp) |
| 5442 |
{ |
| 5443 |
fp->name = "x86"; |
| 5444 |
fp->cpu_new = x86_cpu_new; |
| 5445 |
fp->list_available_types = x86_cpu_list_available_types; |
| 5446 |
fp->register_match = x86_cpu_register_match; |
| 5447 |
fp->disassemble_instr = x86_cpu_disassemble_instr; |
| 5448 |
fp->register_dump = x86_cpu_register_dump; |
| 5449 |
fp->run = x86_cpu_run; |
| 5450 |
fp->dumpinfo = x86_cpu_dumpinfo; |
| 5451 |
/* fp->show_full_statistics = x86_cpu_show_full_statistics; */ |
| 5452 |
/* fp->tlbdump = x86_cpu_tlbdump; */ |
| 5453 |
fp->interrupt = x86_cpu_interrupt; |
| 5454 |
fp->interrupt_ack = x86_cpu_interrupt_ack; |
| 5455 |
return 1; |
| 5456 |
} |
| 5457 |
|
| 5458 |
#endif /* ENABLE_X86 */ |
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