1 |
dpavlin |
2 |
/* |
2 |
|
|
* Copyright (C) 2002,2005 Anders Gavare. All rights reserved. |
3 |
|
|
* |
4 |
|
|
* Redistribution and use in source and binary forms, with or without |
5 |
|
|
* modification, are permitted provided that the following conditions are met: |
6 |
|
|
* |
7 |
|
|
* 1. Redistributions of source code must retain the above copyright |
8 |
|
|
* notice, this list of conditions and the following disclaimer. |
9 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
10 |
|
|
* notice, this list of conditions and the following disclaimer in the |
11 |
|
|
* documentation and/or other materials provided with the distribution. |
12 |
|
|
* 3. The name of the author may not be used to endorse or promote products |
13 |
|
|
* derived from this software without specific prior written permission. |
14 |
|
|
* |
15 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
16 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
18 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
19 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
21 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
22 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
23 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 |
|
|
* SUCH DAMAGE. |
26 |
|
|
* |
27 |
dpavlin |
10 |
* $Id: rssb_as.c,v 1.3 2005/06/20 05:52:45 debug Exp $ |
28 |
dpavlin |
2 |
* |
29 |
|
|
* A simple assembler for URISC ("reverse subtract and skip on borrow"). |
30 |
|
|
*/ |
31 |
|
|
|
32 |
|
|
#include <stdio.h> |
33 |
|
|
#include <stdlib.h> |
34 |
|
|
#include <string.h> |
35 |
|
|
#include <inttypes.h> |
36 |
|
|
|
37 |
|
|
|
38 |
|
|
#define MAX_SYMBOL_LEN 64 |
39 |
|
|
|
40 |
|
|
struct symbol { |
41 |
|
|
char name[MAX_SYMBOL_LEN]; |
42 |
|
|
uint32_t addr; |
43 |
|
|
struct symbol *next; |
44 |
|
|
}; |
45 |
|
|
|
46 |
|
|
|
47 |
|
|
struct symbol *first_symbol = NULL; |
48 |
|
|
|
49 |
|
|
|
50 |
|
|
int debug = 0; |
51 |
|
|
|
52 |
|
|
|
53 |
|
|
uint32_t get_symbol(char *symbol) |
54 |
|
|
{ |
55 |
|
|
struct symbol *s; |
56 |
|
|
|
57 |
|
|
s = first_symbol; |
58 |
|
|
while (s != NULL) { |
59 |
|
|
if (strcmp(symbol, s->name) == 0) |
60 |
|
|
return s->addr; |
61 |
|
|
|
62 |
|
|
s = s->next; |
63 |
|
|
} |
64 |
|
|
|
65 |
|
|
fprintf(stderr, "undefined symbol '%s'\n", symbol); |
66 |
|
|
exit(1); |
67 |
|
|
} |
68 |
|
|
|
69 |
|
|
|
70 |
|
|
void add_symbol(char *symbol, uint32_t addr) |
71 |
|
|
{ |
72 |
|
|
struct symbol *s; |
73 |
|
|
|
74 |
|
|
if (strlen(symbol) > MAX_SYMBOL_LEN-1) { |
75 |
|
|
fprintf(stderr, "symbol '%s' too long\n", symbol); |
76 |
|
|
exit(1); |
77 |
|
|
} |
78 |
|
|
|
79 |
|
|
s = malloc(sizeof(struct symbol)); |
80 |
|
|
if (s == NULL) { |
81 |
|
|
fprintf(stderr, "out of memory\n"); |
82 |
|
|
exit(1); |
83 |
|
|
} |
84 |
|
|
|
85 |
dpavlin |
10 |
strlcpy(s->name, symbol, MAX_SYMBOL_LEN); |
86 |
dpavlin |
2 |
s->addr = addr; |
87 |
|
|
|
88 |
|
|
if (debug > 1) |
89 |
|
|
printf(" %08x = %s\n", addr, symbol); |
90 |
|
|
|
91 |
|
|
s->next = first_symbol; |
92 |
|
|
first_symbol = s; |
93 |
|
|
} |
94 |
|
|
|
95 |
|
|
|
96 |
|
|
uint32_t pass1(FILE *fin) |
97 |
|
|
{ |
98 |
|
|
uint32_t curaddr = 0; |
99 |
|
|
char line[200]; |
100 |
|
|
int lineno = 0; |
101 |
|
|
|
102 |
|
|
if (debug > 0) |
103 |
|
|
printf("Pass 1\n"); |
104 |
|
|
|
105 |
|
|
while (!feof(fin)) { |
106 |
|
|
line[0] = '\0'; |
107 |
|
|
fgets(line, sizeof(line), fin); |
108 |
|
|
lineno++; |
109 |
|
|
if (line[0]) { |
110 |
|
|
if (line[strlen(line)-1]=='\n') |
111 |
|
|
line[strlen(line)-1]=0; |
112 |
|
|
|
113 |
|
|
if (debug > 2) |
114 |
|
|
printf(" addr=%08x line='%s'\n", |
115 |
|
|
curaddr,line); |
116 |
|
|
|
117 |
|
|
switch (line[0]) { |
118 |
|
|
case '\0': |
119 |
|
|
case '#': |
120 |
|
|
break; |
121 |
|
|
case 'L': |
122 |
|
|
/* Add a symbol: */ |
123 |
|
|
add_symbol(line+1, curaddr); |
124 |
|
|
break; |
125 |
|
|
case 'A': |
126 |
|
|
case 'D': |
127 |
|
|
case 'E': |
128 |
|
|
/* Increase addr by 4: */ |
129 |
|
|
curaddr += sizeof(uint32_t); |
130 |
|
|
break; |
131 |
|
|
case 'O': |
132 |
|
|
/* Set orig manually: */ |
133 |
|
|
curaddr = atoi(line+1); |
134 |
|
|
break; |
135 |
|
|
default: |
136 |
|
|
fprintf(stderr, "error on input line %i\n", |
137 |
|
|
lineno); |
138 |
|
|
exit(1); |
139 |
|
|
} |
140 |
|
|
} |
141 |
|
|
} |
142 |
|
|
|
143 |
|
|
return curaddr; |
144 |
|
|
} |
145 |
|
|
|
146 |
|
|
|
147 |
|
|
void pass2(FILE *fin, FILE *fout, uint32_t first_diffaddr) |
148 |
|
|
{ |
149 |
|
|
uint32_t curaddr = 0; |
150 |
|
|
uint32_t curdiffaddr = first_diffaddr; |
151 |
|
|
uint32_t value, value2; |
152 |
|
|
char line[200]; |
153 |
|
|
int lineno = 0; |
154 |
|
|
char *p; |
155 |
|
|
unsigned char b1; |
156 |
|
|
unsigned char b2; |
157 |
|
|
unsigned char b3; |
158 |
|
|
unsigned char b4; |
159 |
|
|
|
160 |
|
|
if (debug > 0) |
161 |
|
|
printf("Pass 2\n"); |
162 |
|
|
|
163 |
|
|
while (!feof(fin)) { |
164 |
|
|
line[0] = '\0'; |
165 |
|
|
fgets(line, sizeof(line), fin); |
166 |
|
|
lineno++; |
167 |
|
|
if (line[0]) { |
168 |
|
|
if (line[strlen(line)-1]=='\n') |
169 |
|
|
line[strlen(line)-1]=0; |
170 |
|
|
|
171 |
|
|
if (debug > 2) |
172 |
|
|
printf(" addr=%08x line='%s'\n", |
173 |
|
|
curaddr,line); |
174 |
|
|
|
175 |
|
|
switch (line[0]) { |
176 |
|
|
case '\0': |
177 |
|
|
case '#': |
178 |
|
|
case 'L': |
179 |
|
|
break; |
180 |
|
|
case 'A': |
181 |
|
|
/* Output value and increase addr by 4: */ |
182 |
|
|
fseek(fout, curaddr, SEEK_SET); |
183 |
|
|
if (line[1]>='0' && line[1]<='9') |
184 |
|
|
value = atoi(line+1); |
185 |
|
|
else |
186 |
|
|
value = get_symbol(line+1); |
187 |
|
|
b1 = value >> 24; |
188 |
|
|
b2 = value >> 16; |
189 |
|
|
b3 = value >> 8; |
190 |
|
|
b4 = value; |
191 |
|
|
fwrite(&b1, 1, 1, fout); |
192 |
|
|
fwrite(&b2, 1, 1, fout); |
193 |
|
|
fwrite(&b3, 1, 1, fout); |
194 |
|
|
fwrite(&b4, 1, 1, fout); |
195 |
|
|
|
196 |
|
|
curaddr += sizeof(uint32_t); |
197 |
|
|
break; |
198 |
|
|
case 'D': |
199 |
|
|
case 'E': |
200 |
|
|
/* Address differance calculation: */ |
201 |
|
|
p = line+1; |
202 |
|
|
while (*p && *p!=' ') |
203 |
|
|
p++; |
204 |
|
|
if (!*p) { |
205 |
|
|
fprintf(stderr, "error on input line" |
206 |
|
|
" %i, D syntax error\n", lineno); |
207 |
|
|
exit(1); |
208 |
|
|
} |
209 |
|
|
p[0]=0; p++; |
210 |
|
|
|
211 |
|
|
if (line[1]>='0' && line[1]<='9') |
212 |
|
|
value = atoi(line+1); |
213 |
|
|
else |
214 |
|
|
value = get_symbol(line+1); |
215 |
|
|
|
216 |
|
|
if (p[0]>='0' && p[0]<='9') |
217 |
|
|
value2 = atoi(p); |
218 |
|
|
else |
219 |
|
|
value2 = get_symbol(p); |
220 |
|
|
|
221 |
|
|
if (line[0]=='D') { |
222 |
|
|
if (value < value2) |
223 |
|
|
value = value - value2 + 4; |
224 |
|
|
else |
225 |
|
|
value = value - value2; |
226 |
|
|
} else { |
227 |
|
|
/* In conditional jumps: The -4 |
228 |
|
|
is because PC is already |
229 |
|
|
updated when it is written |
230 |
|
|
back to: */ |
231 |
|
|
value = value - value2 - 4; |
232 |
|
|
} |
233 |
|
|
|
234 |
|
|
/* Output value in the diff section: */ |
235 |
|
|
fseek(fout, curdiffaddr, SEEK_SET); |
236 |
|
|
b1 = value >> 24; |
237 |
|
|
b2 = value >> 16; |
238 |
|
|
b3 = value >> 8; |
239 |
|
|
b4 = value; |
240 |
|
|
fwrite(&b1, 1, 1, fout); |
241 |
|
|
fwrite(&b2, 1, 1, fout); |
242 |
|
|
fwrite(&b3, 1, 1, fout); |
243 |
|
|
fwrite(&b4, 1, 1, fout); |
244 |
|
|
|
245 |
|
|
/* Output the diff addr to the code section: */ |
246 |
|
|
fseek(fout, curaddr, SEEK_SET); |
247 |
|
|
value = curdiffaddr; |
248 |
|
|
b1 = value >> 24; |
249 |
|
|
b2 = value >> 16; |
250 |
|
|
b3 = value >> 8; |
251 |
|
|
b4 = value; |
252 |
|
|
fwrite(&b1, 1, 1, fout); |
253 |
|
|
fwrite(&b2, 1, 1, fout); |
254 |
|
|
fwrite(&b3, 1, 1, fout); |
255 |
|
|
fwrite(&b4, 1, 1, fout); |
256 |
|
|
|
257 |
|
|
curaddr += sizeof(uint32_t); |
258 |
|
|
curdiffaddr += sizeof(uint32_t); |
259 |
|
|
break; |
260 |
|
|
case 'O': |
261 |
|
|
/* Set orig manually: */ |
262 |
|
|
curaddr = atoi(line+1); |
263 |
|
|
break; |
264 |
|
|
default: |
265 |
|
|
fprintf(stderr, "error on input line %i\n", |
266 |
|
|
lineno); |
267 |
|
|
exit(1); |
268 |
|
|
} |
269 |
|
|
} |
270 |
|
|
} |
271 |
|
|
} |
272 |
|
|
|
273 |
|
|
|
274 |
|
|
int main(int argc, char *argv[]) |
275 |
|
|
{ |
276 |
|
|
FILE *fin, *fout; |
277 |
|
|
uint32_t first_diffaddr; |
278 |
|
|
|
279 |
|
|
if (argc != 3) { |
280 |
|
|
fprintf(stderr, "usage: %s asmsource binimage\n", argv[0]); |
281 |
|
|
fprintf(stderr, "Input is read from asmsource and " |
282 |
|
|
"output is written to binimage\n"); |
283 |
|
|
exit(1); |
284 |
|
|
} |
285 |
|
|
|
286 |
|
|
fin = fopen(argv[1], "r"); |
287 |
|
|
if (fin == NULL) { |
288 |
|
|
perror(argv[1]); |
289 |
|
|
exit(2); |
290 |
|
|
} |
291 |
|
|
|
292 |
|
|
fout = fopen(argv[2], "w"); |
293 |
|
|
if (fout = NULL) { |
294 |
|
|
perror(argv[2]); |
295 |
|
|
exit(2); |
296 |
|
|
} |
297 |
|
|
|
298 |
|
|
first_diffaddr = pass1(fin); |
299 |
|
|
fseek(fin, 0, SEEK_SET); |
300 |
|
|
pass2(fin, fout, first_diffaddr); |
301 |
|
|
|
302 |
|
|
fclose(fin); |
303 |
|
|
fclose(fout); |
304 |
|
|
|
305 |
|
|
return 0; |
306 |
|
|
} |
307 |
|
|
|