src/debugger/debugger_cmds.c

/*
 *  Copyright (C) 2004-2006  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *
 *
 *  $Id: debugger_cmds.c,v 1.5 2006/06/24 19:52:28 debug Exp $
 *
 *  Debugger commands. Included from debugger.c.
 */


/*
 *  debugger_cmd_allsettings():
 */
static void debugger_cmd_allsettings(struct machine *m, char *cmd_line)
{
        settings_debugdump(global_settings, GLOBAL_SETTINGS_NAME, 1);
}


/*
 *  debugger_cmd_breakpoint():
 *
 *  TODO: automagic "expansion" for the subcommand names (s => show).
 */
static void debugger_cmd_breakpoint(struct machine *m, char *cmd_line)
{
        int i, res;

        while (cmd_line[0] != '\0' && cmd_line[0] == ' ')
                cmd_line ++;

        if (cmd_line[0] == '\0') {
                printf("syntax: breakpoint subcmd [args...]\n");
                printf("Available subcmds (and args) are:\n");
                printf("  add addr      add a breakpoint for address addr\n");
                printf("  delete x      delete breakpoint nr x\n");
                printf("  show          show current breakpoints\n");
                return;
        }

        if (strcmp(cmd_line, "show") == 0) {
                if (m->n_breakpoints == 0)
                        printf("No breakpoints set.\n");
                for (i=0; i<m->n_breakpoints; i++)
                        show_breakpoint(m, i);
                return;
        }

        if (strncmp(cmd_line, "delete ", 7) == 0) {
                int x = atoi(cmd_line + 7);

                if (m->n_breakpoints == 0) {
                        printf("No breakpoints set.\n");
                        return;
                }
                if (x < 0 || x >= m->n_breakpoints) {
                        printf("Invalid breakpoint nr %i. Use 'breakpoint "
                            "show' to see the current breakpoints.\n", x);
                        return;
                }

                free(m->breakpoint_string[x]);

                for (i=x; i<m->n_breakpoints-1; i++) {
                        m->breakpoint_addr[i]   = m->breakpoint_addr[i+1];
                        m->breakpoint_string[i] = m->breakpoint_string[i+1];
                        m->breakpoint_flags[i]  = m->breakpoint_flags[i+1];
                }
                m->n_breakpoints --;

                /*  Clear translations:  */
                for (i=0; i<m->ncpus; i++)
                        if (m->cpus[i]->translation_cache != NULL)
                                cpu_create_or_reset_tc(m->cpus[i]);
                return;
        }

        if (strncmp(cmd_line, "add ", 4) == 0) {
                uint64_t tmp;
                size_t breakpoint_buf_len;

                if (m->n_breakpoints >= MAX_BREAKPOINTS) {
                        printf("Too many breakpoints. (You need to recompile"
                            " gxemul to increase this. Max = %i.)\n",
                            MAX_BREAKPOINTS);
                        return;
                }

                i = m->n_breakpoints;

                res = debugger_parse_name(m, cmd_line + 4, 0, &tmp);
                if (!res) {
                        printf("Couldn't parse '%s'\n", cmd_line + 4);
                        return;
                }

                breakpoint_buf_len = strlen(cmd_line+4) + 1;
                m->breakpoint_string[i] = malloc(breakpoint_buf_len);
                if (m->breakpoint_string[i] == NULL) {
                        printf("out of memory in debugger_cmd_breakpoint()\n");
                        exit(1);
                }
                strlcpy(m->breakpoint_string[i], cmd_line+4,
                    breakpoint_buf_len);
                m->breakpoint_addr[i] = tmp;
                m->breakpoint_flags[i] = 0;

                m->n_breakpoints ++;
                show_breakpoint(m, i);

                /*  Clear translations:  */
                for (i=0; i<m->ncpus; i++)
                        if (m->cpus[i]->translation_cache != NULL)
                                cpu_create_or_reset_tc(m->cpus[i]);
                return;
        }

        printf("Unknown breakpoint subcommand.\n");
}


/*
 *  debugger_cmd_continue():
 */
static void debugger_cmd_continue(struct machine *m, char *cmd_line)
{
        if (*cmd_line) {
                printf("syntax: continue\n");
                return;
        }

        exit_debugger = 1;
}


/*
 *  debugger_cmd_device():
 */
static void debugger_cmd_device(struct machine *m, char *cmd_line)
{
        int i;
        struct memory *mem;
        struct cpu *c;

        if (cmd_line[0] == '\0')
                goto return_help;

        if (m->cpus == NULL) {
                printf("No cpus (?)\n");
                return;
        }
        c = m->cpus[m->bootstrap_cpu];
        if (c == NULL) {
                printf("m->cpus[m->bootstrap_cpu] = NULL\n");
                return;
        }
        mem = m->cpus[m->bootstrap_cpu]->mem;

        if (m->cpus == NULL) {
                printf("No cpus (?)\n");
                return;
        }
        c = m->cpus[m->bootstrap_cpu];
        if (c == NULL) {
                printf("m->cpus[m->bootstrap_cpu] = NULL\n");
                return;
        }
        mem = m->cpus[m->bootstrap_cpu]->mem;

        if (strcmp(cmd_line, "all") == 0) {
                device_dumplist();
        } else if (strncmp(cmd_line, "add ", 4) == 0) {
                device_add(m, cmd_line+4);
        } else if (strcmp(cmd_line, "consoles") == 0) {
                console_debug_dump(m);
        } else if (strncmp(cmd_line, "remove ", 7) == 0) {
                i = atoi(cmd_line + 7);
                if (i==0 && cmd_line[7]!='0') {
                        printf("Weird device number. Use 'device list'.\n");
                } else
                        memory_device_remove(m->memory, i);
        } else if (strcmp(cmd_line, "list") == 0) {
                if (mem->n_mmapped_devices == 0)
                        printf("No memory-mapped devices in this machine.\n");

                for (i=0; i<mem->n_mmapped_devices; i++) {
                        printf("%2i: %25s @ 0x%011"PRIx64", len = 0x%"PRIx64,
                            i, mem->dev_name[i],
                            (uint64_t) mem->dev_baseaddr[i],
                            (uint64_t) mem->dev_length[i]);

                        if (mem->dev_flags[i]) {
                                printf(" (");
                                if (mem->dev_flags[i] & DM_DYNTRANS_OK)
                                        printf("DYNTRANS R");
                                if (mem->dev_flags[i] & DM_DYNTRANS_WRITE_OK)
                                        printf("+W");
                                printf(")");
                        }
                        printf("\n");
                }
        } else
                goto return_help;

        return;

return_help:
        printf("syntax: devices cmd [...]\n");
        printf("Available cmds are:\n");
        printf("  add name_and_params    add a device to the current "
            "machine\n");
        printf("  all                    list all registered devices\n");
        printf("  consoles               list all slave consoles\n");
        printf("  list                   list memory-mapped devices in the"
            " current machine\n");
        printf("  remove x               remove device nr x from the "
            "current machine\n");
}


/*
 *  debugger_cmd_dump():
 *
 *  Dump emulated memory in hex and ASCII.
 *
 *  syntax: dump [addr [endaddr]]
 */
static void debugger_cmd_dump(struct machine *m, char *cmd_line)
{
        uint64_t addr, addr_start, addr_end;
        struct cpu *c;
        struct memory *mem;
        char *p = NULL;
        int x, r;

        if (cmd_line[0] != '\0') {
                uint64_t tmp;
                char *tmps = strdup(cmd_line);

                /*  addr:  */
                p = strchr(tmps, ' ');
                if (p != NULL)
                        *p = '\0';
                r = debugger_parse_name(m, tmps, 0, &tmp);
                free(tmps);

                if (r == NAME_PARSE_NOMATCH || r == NAME_PARSE_MULTIPLE) {
                        printf("Unparsable address: %s\n", cmd_line);
                        return;
                } else {
                        last_dump_addr = tmp;
                }

                p = strchr(cmd_line, ' ');
        }

        addr_start = last_dump_addr;

        if (addr_start == MAGIC_UNTOUCHED) {
                uint64_t tmp;
                int match_register = 0;
                cpu_register_match(m, "pc", 0, &tmp, &match_register);
                if (match_register) {
                        addr_start = tmp;
                } else {
                        printf("No starting address.\n");
                        return;
                }
        }

        addr_end = addr_start + 16 * 16;

        /*  endaddr:  */
        if (p != NULL) {
                while (*p == ' ' && *p)
                        p++;
                r = debugger_parse_name(m, p, 0, &addr_end);
                if (r == NAME_PARSE_NOMATCH || r == NAME_PARSE_MULTIPLE) {
                        printf("Unparsable address: %s\n", cmd_line);
                        return;
                }
        }

        if (m->cpus == NULL) {
                printf("No cpus (?)\n");
                return;
        }
        c = m->cpus[m->bootstrap_cpu];
        if (c == NULL) {
                printf("m->cpus[m->bootstrap_cpu] = NULL\n");
                return;
        }
        mem = m->cpus[m->bootstrap_cpu]->mem;

        addr = addr_start & ~0xf;

        ctrl_c = 0;

        while (addr < addr_end) {
                unsigned char buf[16];
                memset(buf, 0, sizeof(buf));
                r = c->memory_rw(c, mem, addr, &buf[0], sizeof(buf),
                    MEM_READ, CACHE_NONE | NO_EXCEPTIONS);

                if (c->is_32bit)
                        printf("0x%08"PRIx32"  ", (uint32_t) addr);
                else
                        printf("0x%016"PRIx64"  ", (uint64_t) addr);

                if (r == MEMORY_ACCESS_FAILED)
                        printf("(memory access failed)\n");
                else {
                        for (x=0; x<16; x++) {
                                if (addr + x >= addr_start &&
                                    addr + x < addr_end)
                                        printf("%02x%s", buf[x],
                                            (x&3)==3? " " : "");
                                else
                                        printf("  %s", (x&3)==3? " " : "");
                        }
                        printf(" ");
                        for (x=0; x<16; x++) {
                                if (addr + x >= addr_start &&
                                    addr + x < addr_end)
                                        printf("%c", (buf[x]>=' ' &&
                                            buf[x]<127)? buf[x] : '.');
                                else
                                        printf(" ");
                        }
                        printf("\n");
                }

                if (ctrl_c)
                        return;

                addr += sizeof(buf);
        }

        last_dump_addr = addr_end;

        strlcpy(repeat_cmd, "dump", MAX_CMD_BUFLEN);
}


/*
 *  debugger_cmd_emuls():
 *
 *  Dump info about all current emuls.
 */
static void debugger_cmd_emuls(struct machine *m, char *cmd_line)
{
        int i, iadd = DEBUG_INDENTATION;

        if (*cmd_line) {
                printf("syntax: emuls\n");
                return;
        }

        for (i=0; i<debugger_n_emuls; i++) {
                struct emul *e = debugger_emuls[i];

                if (e == NULL)
                        continue;

                debug("emulation %i: \"%s\"\n", i,
                    e->name == NULL? "(no name)" : e->name);
                debug_indentation(iadd);

                emul_dumpinfo(e);

                debug_indentation(-iadd);
        }
}


/*
 *  debugger_cmd_focus():
 *
 *  Changes focus to specific machine (in a specific emulation).
 */
static void debugger_cmd_focus(struct machine *m, char *cmd_line)
{
        int x = -1, y = -1;
        char *p;

        if (!cmd_line[0]) {
                printf("syntax: focus x[,y]\n");
                printf("where x and y are integers as reported by the"
                    " 'emuls' command\n");
                goto print_current_focus_and_return;
        }

        x = atoi(cmd_line);
        p = strchr(cmd_line, ',');
        if (p == cmd_line) {
                printf("No machine number specified?\n");
                printf("syntax: focus x[,y]\n");
                return;
        }

        if (p != NULL)
                y = atoi(p + 1);

        if (y != -1) {
                /*  Change emul:  */
                if (y < 0 || y >= debugger_n_emuls) {
                        printf("Invalid emul number: %i\n", y);
                        return;
                }

                debugger_emul = debugger_emuls[y];

                /*  This is just in case the machine change below fails...  */
                debugger_machine = debugger_emul->machines[0];
        }

        /*  Change machine:  */
        if (x < 0 || x >= debugger_emul->n_machines) {
                printf("Invalid machine number: %i\n", x);
                return;
        }

        debugger_machine = debugger_emul->machines[x];

print_current_focus_and_return:
        printf("current emul: \"%s\"\n", debugger_emul->name == NULL?
            "(no name)" : debugger_emul->name);
        printf("current machine: \"%s\"\n", debugger_machine->name == NULL?
            "(no name)" : debugger_machine->name);
}


/*  This is defined below.  */
static void debugger_cmd_help(struct machine *m, char *cmd_line);


/*
 *  debugger_cmd_itrace():
 */
static void debugger_cmd_itrace(struct machine *m, char *cmd_line)
{
        if (*cmd_line) {
                printf("syntax: itrace\n");
                return;
        }

        old_instruction_trace = 1 - old_instruction_trace;
        printf("instruction_trace = %s\n", old_instruction_trace? "ON":"OFF");
        /*  TODO: how to preserve quiet_mode?  */
        old_quiet_mode = 0;
        printf("quiet_mode = %s\n", old_quiet_mode? "ON" : "OFF");
}


/*
 *  debugger_cmd_lookup():
 */
static void debugger_cmd_lookup(struct machine *m, char *cmd_line)
{
        uint64_t addr;
        int res;
        char *symbol;
        uint64_t offset;

        if (cmd_line[0] == '\0') {
                printf("syntax: lookup name|addr\n");
                return;

        }

        /*  Addresses never need to be given in decimal form anyway,
            so assuming hex here will be ok.  */
        addr = strtoull(cmd_line, NULL, 16);

        if (addr == 0) {
                uint64_t newaddr;
                res = get_symbol_addr(&m->symbol_context,
                    cmd_line, &newaddr);
                if (!res) {
                        printf("lookup for '%s' failed\n", cmd_line);
                        return;
                }
                printf("%s = 0x", cmd_line);
                if (m->cpus[0]->is_32bit)
                        printf("%08"PRIx32"\n", (uint32_t) newaddr);
                else
                        printf("%016"PRIx64"\n", (uint64_t) newaddr);
                return;
        }

        symbol = get_symbol_name(&m->symbol_context, addr, &offset);

        if (symbol != NULL) {
                if (m->cpus[0]->is_32bit)
                        printf("0x%08"PRIx32, (uint32_t) addr);
                else
                        printf("0x%016"PRIx64, (uint64_t) addr);
                printf(" = %s\n", symbol);
        } else
                printf("lookup for '%s' failed\n", cmd_line);
}


/*
 *  debugger_cmd_machine():
 *
 *  Dump info about the currently focused machine.
 */
static void debugger_cmd_machine(struct machine *m, char *cmd_line)
{
        int iadd = DEBUG_INDENTATION;

        if (*cmd_line) {
                printf("syntax: machine\n");
                return;
        }

        debug("machine \"%s\":\n", m->name);
        debug_indentation(iadd);
        machine_dumpinfo(m);
        debug_indentation(-iadd);
}


/*
 *  debugger_cmd_ninstrs():
 */
static void debugger_cmd_ninstrs(struct machine *m, char *cmd_line)
{
        int toggle = 1;
        int previous_mode = m->show_nr_of_instructions;

        if (cmd_line[0] != '\0') {
                while (cmd_line[0] != '\0' && cmd_line[0] == ' ')
                        cmd_line ++;
                switch (cmd_line[0]) {
                case '0':
                        toggle = 0;
                        m->show_nr_of_instructions = 0;
                        break;
                case '1':
                        toggle = 0;
                        m->show_nr_of_instructions = 1;
                        break;
                case 'o':
                case 'O':
                        toggle = 0;
                        switch (cmd_line[1]) {
                        case 'n':
                        case 'N':
                                m->show_nr_of_instructions = 1;
                                break;
                        default:
                                m->show_nr_of_instructions = 0;
                        }
                        break;
                default:
                        printf("syntax: trace [on|off]\n");
                        return;
                }
        }

        if (toggle)
                m->show_nr_of_instructions = !m->show_nr_of_instructions;

        printf("show_nr_of_instructions = %s",
            m->show_nr_of_instructions? "ON" : "OFF");
        if (m->show_nr_of_instructions != previous_mode)
                printf("  (was: %s)", previous_mode? "ON" : "OFF");
        printf("\n");
}


/*
 *  debugger_cmd_pause():
 */
static void debugger_cmd_pause(struct machine *m, char *cmd_line)
{
        int cpuid = -1;

        if (cmd_line[0] != '\0')
                cpuid = atoi(cmd_line);
        else {
                printf("syntax: pause cpuid\n");
                return;
        }

        if (cpuid < 0 || cpuid >= m->ncpus) {
                printf("cpu%i doesn't exist.\n", cpuid);
                return;
        }

        m->cpus[cpuid]->running ^= 1;

        printf("cpu%i (%s) in machine \"%s\" is now %s\n", cpuid,
            m->cpus[cpuid]->name, m->name,
            m->cpus[cpuid]->running? "RUNNING" : "STOPPED");
}


/*
 *  debugger_cmd_print():
 */
static void debugger_cmd_print(struct machine *m, char *cmd_line)
{
        int res;
        uint64_t tmp;

        while (cmd_line[0] != '\0' && cmd_line[0] == ' ')
                cmd_line ++;

        if (cmd_line[0] == '\0') {
                printf("syntax: print expr\n");
                return;
        }

        res = debugger_parse_name(m, cmd_line, 0, &tmp);
        switch (res) {
        case NAME_PARSE_NOMATCH:
                printf("No match.\n");
                break;
        case NAME_PARSE_MULTIPLE:
                printf("Multiple matches. Try prefixing with %%, $, or @.\n");
                break;
        case NAME_PARSE_REGISTER:
                printf("%s = 0x%"PRIx64"\n", cmd_line, (uint64_t)tmp);
                break;
        case NAME_PARSE_SYMBOL:
                if (m->cpus[0]->is_32bit)
                        printf("%s = 0x%08"PRIx32"\n", cmd_line, (uint32_t)tmp);
                else
                        printf("%s = 0x%016"PRIx64"\n", cmd_line,(uint64_t)tmp);
                break;
        case NAME_PARSE_NUMBER:
                printf("0x%"PRIx64"\n", (uint64_t) tmp);
                break;
        }
}


/*
 *  debugger_cmd_put():
 */
static void debugger_cmd_put(struct machine *m, char *cmd_line)
{
        static char put_type = ' ';  /*  Remembered across multiple calls.  */
        char copy[200];
        int res, syntax_ok = 0;
        char *p, *p2, *q = NULL;
        uint64_t addr, data;
        unsigned char a_byte;

        strncpy(copy, cmd_line, sizeof(copy));
        copy[sizeof(copy)-1] = '\0';

        /*  syntax: put [b|h|w|d|q] addr, data  */

        p = strchr(copy, ',');
        if (p != NULL) {
                *p++ = '\0';
                while (*p == ' ' && *p)
                        p++;
                while (strlen(copy) >= 1 &&
                    copy[strlen(copy) - 1] == ' ')
                        copy[strlen(copy) - 1] = '\0';

                /*  printf("L = '%s', R = '%s'\n", copy, p);  */

                q = copy;
                p2 = strchr(q, ' ');

                if (p2 != NULL) {
                        *p2 = '\0';
                        if (strlen(q) != 1) {
                                printf("Invalid type '%s'\n", q);
                                return;
                        }
                        put_type = *q;
                        q = p2 + 1;
                }

                /*  printf("type '%c', L '%s', R '%s'\n", put_type, q, p);  */
                syntax_ok = 1;
        }

        if (!syntax_ok) {
                printf("syntax: put [b|h|w|d|q] addr, data\n");
                printf("   b    byte        (8 bits)\n");
                printf("   h    half-word   (16 bits)\n");
                printf("   w    word        (32 bits)\n");
                printf("   d    doubleword  (64 bits)\n");
                printf("   q    quad-word   (128 bits)\n");
                return;
        }

        if (put_type == ' ') {
                printf("No type specified.\n");
                return;
        }

        /*  here: q is the address, p is the data.  */
        res = debugger_parse_name(m, q, 0, &addr);
        switch (res) {
        case NAME_PARSE_NOMATCH:
                printf("Couldn't parse the address.\n");
                return;
        case NAME_PARSE_MULTIPLE:
                printf("Multiple matches for the address."
                    " Try prefixing with %%, $, or @.\n");
                return;
        case NAME_PARSE_REGISTER:
        case NAME_PARSE_SYMBOL:
        case NAME_PARSE_NUMBER:
                break;
        default:
                printf("INTERNAL ERROR in debugger.c.\n");
                return;
        }

        res = debugger_parse_name(m, p, 0, &data);
        switch (res) {
        case NAME_PARSE_NOMATCH:
                printf("Couldn't parse the data.\n");
                return;
        case NAME_PARSE_MULTIPLE:
                printf("Multiple matches for the data value."
                    " Try prefixing with %%, $, or @.\n");
                return;
        case NAME_PARSE_REGISTER:
        case NAME_PARSE_SYMBOL:
        case NAME_PARSE_NUMBER:
                break;
        default:
                printf("INTERNAL ERROR in debugger.c.\n");
                return;
        }

        /*  TODO: haha, maybe this should be refactored  */

        switch (put_type) {
        case 'b':
                a_byte = data;
                if (m->cpus[0]->is_32bit)
                        printf("0x%08"PRIx32, (uint32_t) addr);
                else
                        printf("0x%016"PRIx64, (uint64_t) addr);
                printf(": %02x", a_byte);
                if (data > 255)
                        printf(" (NOTE: truncating %0"PRIx64")",
                            (uint64_t) data);
                res = m->cpus[0]->memory_rw(m->cpus[0], m->cpus[0]->mem, addr,
                    &a_byte, 1, MEM_WRITE, CACHE_NONE | NO_EXCEPTIONS);
                if (!res)
                        printf("  FAILED!\n");
                printf("\n");
                return;
        case 'h':
                if ((addr & 1) != 0)
                        printf("WARNING: address isn't aligned\n");
                if (m->cpus[0]->is_32bit)
                        printf("0x%08"PRIx32, (uint32_t) addr);
                else
                        printf("0x%016"PRIx64, (uint64_t) addr);
                printf(": %04x", (int)data);
                if (data > 0xffff)
                        printf(" (NOTE: truncating %0"PRIx64")",
                            (uint64_t) data);
                res = store_16bit_word(m->cpus[0], addr, data);
                if (!res)
                        printf("  FAILED!\n");
                printf("\n");
                return;
        case 'w':
                if ((addr & 3) != 0)
                        printf("WARNING: address isn't aligned\n");
                if (m->cpus[0]->is_32bit)
                        printf("0x%08"PRIx32, (uint32_t) addr);
                else
                        printf("0x%016"PRIx64, (uint64_t) addr);

                printf(": %08x", (int)data);

                if (data > 0xffffffff && (data >> 32) != 0
                    && (data >> 32) != 0xffffffff)
                        printf(" (NOTE: truncating %0"PRIx64")",
                            (uint64_t) data);

                res = store_32bit_word(m->cpus[0], addr, data);
                if (!res)
                        printf("  FAILED!\n");
                printf("\n");
                return;
        case 'd':
                if ((addr & 7) != 0)
                        printf("WARNING: address isn't aligned\n");
                if (m->cpus[0]->is_32bit)
                        printf("0x%08"PRIx32, (uint32_t) addr);
                else
                        printf("0x%016"PRIx64, (uint64_t) addr);

                printf(": %016"PRIx64, (uint64_t) data);

                res = store_64bit_word(m->cpus[0], addr, data);
                if (!res)
                        printf("  FAILED!\n");
                printf("\n");
                return;
        case 'q':
                printf("quad-words: TODO\n");
                /*  TODO  */
                return;
        default:
                printf("Unimplemented type '%c'\n", put_type);
                return;
        }
}


/*
 *  debugger_cmd_quiet():
 */
static void debugger_cmd_quiet(struct machine *m, char *cmd_line)
{
        int toggle = 1;
        int previous_mode = old_quiet_mode;

        if (cmd_line[0] != '\0') {
                while (cmd_line[0] != '\0' && cmd_line[0] == ' ')
                        cmd_line ++;
                switch (cmd_line[0]) {
                case '0':
                        toggle = 0;
                        old_quiet_mode = 0;
                        break;
                case '1':
                        toggle = 0;
                        old_quiet_mode = 1;
                        break;
                case 'o':
                case 'O':
                        toggle = 0;
                        switch (cmd_line[1]) {
                        case 'n':
                        case 'N':
                                old_quiet_mode = 1;
                                break;
                        default:
                                old_quiet_mode = 0;
                        }
                        break;
                default:
                        printf("syntax: quiet [on|off]\n");
                        return;
                }
        }

        if (toggle)
                old_quiet_mode = 1 - old_quiet_mode;

        printf("quiet_mode = %s", old_quiet_mode? "ON" : "OFF");
        if (old_quiet_mode != previous_mode)
                printf("  (was: %s)", previous_mode? "ON" : "OFF");
        printf("\n");
}


/*
 *  debugger_cmd_quit():
 */
static void debugger_cmd_quit(struct machine *m, char *cmd_line)
{
        int i, j, k;
        struct emul *e;

        if (*cmd_line) {
                printf("syntax: quit\n");
                return;
        }

        for (i=0; i<debugger_n_emuls; i++) {
                single_step = NOT_SINGLE_STEPPING;

                e = debugger_emuls[i];
                force_debugger_at_exit = 0;

                for (j=0; j<e->n_machines; j++) {
                        struct machine *m = e->machines[j];

                        for (k=0; k<m->ncpus; k++)
                                m->cpus[k]->running = 0;

                        m->exit_without_entering_debugger = 1;
                }
        }

        exit_debugger = 1;
}


/*
 *  debugger_cmd_reg():
 */
static void debugger_cmd_reg(struct machine *m, char *cmd_line)
{
        int i, cpuid = -1, coprocnr = -1;
        int gprs, coprocs;
        char *p;

        /*  [cpuid][,c]  */
        if (cmd_line[0] != '\0') {
                if (cmd_line[0] != ',') {
                        cpuid = strtoull(cmd_line, NULL, 0);
                        if (cpuid < 0 || cpuid >= m->ncpus) {
                                printf("cpu%i doesn't exist.\n", cpuid);
                                return;
                        }
                }
                p = strchr(cmd_line, ',');
                if (p != NULL) {
                        coprocnr = atoi(p + 1);
                        if (coprocnr < 0 || coprocnr >= 4) {
                                printf("Invalid coprocessor number.\n");
                                return;
                        }
                }
        }

        gprs = (coprocnr == -1)? 1 : 0;
        coprocs = (coprocnr == -1)? 0x0 : (1 << coprocnr);

        for (i=0; i<m->ncpus; i++)
                if (cpuid == -1 || i == cpuid)
                        cpu_register_dump(m, m->cpus[i], gprs, coprocs);
}


/*
 *  debugger_cmd_step():
 */
static void debugger_cmd_step(struct machine *m, char *cmd_line)
{
        int n = 1;

        if (cmd_line[0] != '\0') {
                n = strtoull(cmd_line, NULL, 0);
                if (n < 1) {
                        printf("invalid nr of steps\n");
                        return;
                }
        }

        debugger_n_steps_left_before_interaction = n - 1;

        /*  Special hack, see debugger() for more info.  */
        exit_debugger = -1;

        strlcpy(repeat_cmd, "step", MAX_CMD_BUFLEN);
}


/*
 *  debugger_cmd_tlbdump():
 *
 *  Dump each CPU's TLB contents.
 */
static void debugger_cmd_tlbdump(struct machine *m, char *cmd_line)
{
        int x = -1;
        int rawflag = 0;

        if (cmd_line[0] != '\0') {
                char *p;
                if (cmd_line[0] != ',') {
                        x = strtoull(cmd_line, NULL, 0);
                        if (x < 0 || x >= m->ncpus) {
                                printf("cpu%i doesn't exist.\n", x);
                                return;
                        }
                }
                p = strchr(cmd_line, ',');
                if (p != NULL) {
                        switch (p[1]) {
                        case 'r':
                        case 'R':
                                rawflag = 1;
                                break;
                        default:
                                printf("Unknown tlbdump flag.\n");
                                printf("syntax: tlbdump [cpuid][,r]\n");
                                return;
                        }
                }
        }

        cpu_tlbdump(m, x, rawflag);
}


/*
 *  debugger_cmd_trace():
 */
static void debugger_cmd_trace(struct machine *m, char *cmd_line)
{
        int toggle = 1;
        int previous_mode = old_show_trace_tree;

        if (cmd_line[0] != '\0') {
                while (cmd_line[0] != '\0' && cmd_line[0] == ' ')
                        cmd_line ++;
                switch (cmd_line[0]) {
                case '0':
                        toggle = 0;
                        old_show_trace_tree = 0;
                        break;
                case '1':
                        toggle = 0;
                        old_show_trace_tree = 1;
                        break;
                case 'o':
                case 'O':
                        toggle = 0;
                        switch (cmd_line[1]) {
                        case 'n':
                        case 'N':
                                old_show_trace_tree = 1;
                                break;
                        default:
                                old_show_trace_tree = 0;
                        }
                        break;
                default:
                        printf("syntax: trace [on|off]\n");
                        return;
                }
        }

        if (toggle)
                old_show_trace_tree = 1 - old_show_trace_tree;

        printf("show_trace_tree = %s", old_show_trace_tree? "ON" : "OFF");
        if (old_show_trace_tree != previous_mode)
                printf("  (was: %s)", previous_mode? "ON" : "OFF");
        printf("\n");
}


/*
 *  debugger_cmd_unassemble():
 *
 *  Dump emulated memory as instructions.
 *
 *  syntax: unassemble [addr [endaddr]]
 */
static void debugger_cmd_unassemble(struct machine *m, char *cmd_line)
{
        uint64_t addr, addr_start, addr_end;
        struct cpu *c;
        struct memory *mem;
        char *p = NULL;
        int r, lines_left = -1;

        if (cmd_line[0] != '\0') {
                uint64_t tmp;
                char *tmps = strdup(cmd_line);

                /*  addr:  */
                p = strchr(tmps, ' ');
                if (p != NULL)
                        *p = '\0';
                r = debugger_parse_name(m, tmps, 0, &tmp);
                free(tmps);

                if (r == NAME_PARSE_NOMATCH || r == NAME_PARSE_MULTIPLE) {
                        printf("Unparsable address: %s\n", cmd_line);
                        return;
                } else {
                        last_unasm_addr = tmp;
                }

                p = strchr(cmd_line, ' ');
        }

        addr_start = last_unasm_addr;

        if (addr_start == MAGIC_UNTOUCHED) {
                uint64_t tmp;
                int match_register = 0;
                cpu_register_match(m, "pc", 0, &tmp, &match_register);
                if (match_register) {
                        addr_start = tmp;
                } else {
                        printf("No starting address.\n");
                        return;
                }
        }

        addr_end = addr_start + 1000;

        /*  endaddr:  */
        if (p != NULL) {
                while (*p == ' ' && *p)
                        p++;
                r = debugger_parse_name(m, p, 0, &addr_end);
                if (r == NAME_PARSE_NOMATCH || r == NAME_PARSE_MULTIPLE) {
                        printf("Unparsable address: %s\n", cmd_line);
                        return;
                }
        } else
                lines_left = 20;

        if (m->cpus == NULL) {
                printf("No cpus (?)\n");
                return;
        }
        c = m->cpus[m->bootstrap_cpu];
        if (c == NULL) {
                printf("m->cpus[m->bootstrap_cpu] = NULL\n");
                return;
        }
        mem = m->cpus[m->bootstrap_cpu]->mem;

        addr = addr_start;

        ctrl_c = 0;

        while (addr < addr_end) {
                unsigned int i, len;
                int failed = 0;
                unsigned char buf[17];  /*  TODO: How long can an
                                            instruction be, on weird archs?  */
                memset(buf, 0, sizeof(buf));

                for (i=0; i<sizeof(buf); i++) {
                        if (c->memory_rw(c, mem, addr+i, buf+i, 1, MEM_READ,
                            CACHE_NONE | NO_EXCEPTIONS) == MEMORY_ACCESS_FAILED)
                                failed ++;
                }

                if (failed == sizeof(buf)) {
                        printf("(memory access failed)\n");
                        break;
                }

                len = cpu_disassemble_instr(m, c, buf, 0, addr);

                if (ctrl_c)
                        return;
                if (len == 0)
                        break;

                addr += len;

                if (lines_left != -1) {
                        lines_left --;
                        if (lines_left == 0)
                                break;
                }
        }

        last_unasm_addr = addr;

        strlcpy(repeat_cmd, "unassemble", MAX_CMD_BUFLEN);
}


/*
 *  debugger_cmd_version():
 */
static void debugger_cmd_version(struct machine *m, char *cmd_line)
{
        if (*cmd_line) {
                printf("syntax: version\n");
                return;
        }

#ifdef VERSION
        printf("%s, %s\n", VERSION, COMPILE_DATE);
#else
        printf("(no version), %s\n", COMPILE_DATE);
#endif
}


/****************************************************************************/


struct cmd {
        char    *name;
        char    *args;
        int     tmp_flag;
        void    (*f)(struct machine *, char *cmd_line);
        char    *description;
};

static struct cmd cmds[] = {
        { "allsettings", "", 0, debugger_cmd_allsettings,
                "show all settings" },

        { "breakpoint", "...", 0, debugger_cmd_breakpoint,
                "manipulate breakpoints" },

        /*  NOTE: Try to keep 'c' down to only one command. Having 'continue'
            available as a one-letter command is very convenient.  */

        { "continue", "", 0, debugger_cmd_continue,
                "continue execution" },

        { "device", "...", 0, debugger_cmd_device,
                "show info about (or manipulate) devices" },

        { "dump", "[addr [endaddr]]", 0, debugger_cmd_dump,
                "dump memory contents in hex and ASCII" },

        { "emuls", "", 0, debugger_cmd_emuls,
                "print a summary of all current emuls" },

        { "focus", "x[,y]", 0, debugger_cmd_focus,
                "changes focus to machine x (in emul y)" },

        { "help", "", 0, debugger_cmd_help,
                "print this help message" },

        { "itrace", "", 0, debugger_cmd_itrace,
                "toggle instruction_trace on or off" },

        { "lookup", "name|addr", 0, debugger_cmd_lookup,
                "lookup a symbol by name or address" },

        { "machine", "", 0, debugger_cmd_machine,
                "print a summary of the current machine" },

        { "ninstrs", "[on|off]", 0, debugger_cmd_ninstrs,
                "toggle (set or unset) show_nr_of_instructions" },

        { "pause", "cpuid", 0, debugger_cmd_pause,
                "pause (or unpause) a CPU" },

        { "print", "expr", 0, debugger_cmd_print,
                "evaluate an expression without side-effects" },

        { "put", "[b|h|w|d|q] addr, data", 0, debugger_cmd_put,
                "modify emulated memory contents" },

        { "quiet", "[on|off]", 0, debugger_cmd_quiet,
                "toggle quiet_mode on or off" },

        { "quit", "", 0, debugger_cmd_quit,
                "quit the emulator" },

        /*  NOTE: Try to keep 'r' down to only one command. Having 'reg'
            available as a one-letter command is very convenient.  */

        { "reg", "[cpuid][,c]", 0, debugger_cmd_reg,
                "show GPRs (or coprocessor c's registers)" },

        /*  NOTE: Try to keep 's' down to only one command. Having 'step'
            available as a one-letter command is very convenient.  */

        { "step", "[n]", 0, debugger_cmd_step,
                "single-step one (or n) instruction(s)" },

        { "tlbdump", "[cpuid][,r]", 0, debugger_cmd_tlbdump,
                "dump TLB contents (add ',r' for raw data)" },

        { "trace", "[on|off]", 0, debugger_cmd_trace,
                "toggle show_trace_tree on or off" },

        { "unassemble", "[addr [endaddr]]", 0, debugger_cmd_unassemble,
                "dump memory contents as instructions" },

        { "version", "", 0, debugger_cmd_version,
                "print version information" },

        /*  Note: NULL handler.  */
        { "x = expr", "", 0, NULL, "generic assignment" },

        { NULL, NULL, 0, NULL, NULL }
};


/*
 *  debugger_cmd_help():
 *
 *  Print a list of available commands.
 *
 *  NOTE: This is placed after the cmds[] array, because it needs to
 *  access it.
 *
 *  TODO: Command completion (ie just type "help s" for "help step").
 */
static void debugger_cmd_help(struct machine *m, char *cmd_line)
{
        int only_one = 0, only_one_match = 0;
        char *nlines_env = getenv("LINES");
        int nlines = atoi(nlines_env != NULL? nlines_env : "999999"), curlines;
        size_t i, j, max_name_len = 0;

        if (cmd_line[0] != '\0') {
                only_one = 1;
        }

        i = 0;
        while (cmds[i].name != NULL) {
                size_t a = strlen(cmds[i].name);
                if (cmds[i].args != NULL)
                        a += 1 + strlen(cmds[i].args);
                if (a > max_name_len)
                        max_name_len = a;
                i++;
        }

        curlines = 0;
        if (!only_one) {
                printf("Available commands:\n");
                curlines++;
        }

        i = 0;
        while (cmds[i].name != NULL) {
                char buf[100];
                snprintf(buf, sizeof(buf), "%s", cmds[i].name);

                if (only_one) {
                        if (strcmp(cmds[i].name, cmd_line) != 0) {
                                i++;
                                continue;
                        }
                        only_one_match = 1;
                }

                if (cmds[i].args != NULL)
                        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
                            " %s", cmds[i].args);

                printf("  ");
                for (j=0; j<max_name_len; j++)
                        if (j < strlen(buf))
                                printf("%c", buf[j]);
                        else
                                printf(" ");

                printf("   %s\n", cmds[i].description);
                i++;

                curlines ++;
                if (curlines >= nlines - 1) {
                        char ch;
                        printf("-- more --"); fflush(stdout);
                        ch = debugger_readchar();
                        printf("\n");
                        if (ch == 'q' || ch == 'Q')
                                return;
                        curlines = 0;
                }
        }

        if (only_one) {
                if (!only_one_match)
                        printf("%s: no such command\n", cmd_line);
                return;
        }

        /*  TODO: generalize/refactor  */
        curlines += 8;
        if (curlines > nlines - 1) {
                char ch;
                printf("-- more --"); fflush(stdout);
                ch = debugger_readchar();
                printf("\n");
                if (ch == 'q' || ch == 'Q')
                        return;
                curlines = 0;
        }

        printf("\nIn generic assignments, x must be a register, and expr can be"
            " a register, a\nnumeric value, or a symbol name (+ an optional "
            "numeric offset). In case there\nare multiple matches (i.e. a "
            "symbol that has the same name as a register), you\nmay add a "
            "prefix character as a hint: '%%' for registers, '@' for symbols,"
            " and\n'$' for numeric values. Use 0x for hexadecimal values.\n");
}
