root / dyngen.c @ 5132455e
History | View | Annotate | Download (36.8 kB)
1 |
/*
|
---|---|
2 |
* Generic Dynamic compiler generator
|
3 |
*
|
4 |
* Copyright (c) 2003 Fabrice Bellard
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or modify
|
7 |
* it under the terms of the GNU General Public License as published by
|
8 |
* the Free Software Foundation; either version 2 of the License, or
|
9 |
* (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
19 |
*/
|
20 |
#include <stdlib.h> |
21 |
#include <stdio.h> |
22 |
#include <string.h> |
23 |
#include <stdarg.h> |
24 |
#include <inttypes.h> |
25 |
#include <unistd.h> |
26 |
#include <fcntl.h> |
27 |
|
28 |
#include "config.h" |
29 |
|
30 |
/* elf format definitions. We use these macros to test the CPU to
|
31 |
allow cross compilation (this tool must be ran on the build
|
32 |
platform) */
|
33 |
#if defined(HOST_I386)
|
34 |
|
35 |
#define ELF_CLASS ELFCLASS32
|
36 |
#define ELF_ARCH EM_386
|
37 |
#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
|
38 |
#undef ELF_USES_RELOCA
|
39 |
|
40 |
#elif defined(HOST_PPC)
|
41 |
|
42 |
#define ELF_CLASS ELFCLASS32
|
43 |
#define ELF_ARCH EM_PPC
|
44 |
#define elf_check_arch(x) ((x) == EM_PPC)
|
45 |
#define ELF_USES_RELOCA
|
46 |
|
47 |
#elif defined(HOST_S390)
|
48 |
|
49 |
#define ELF_CLASS ELFCLASS32
|
50 |
#define ELF_ARCH EM_S390
|
51 |
#define elf_check_arch(x) ((x) == EM_S390)
|
52 |
#define ELF_USES_RELOCA
|
53 |
|
54 |
#elif defined(HOST_ALPHA)
|
55 |
|
56 |
#define ELF_CLASS ELFCLASS64
|
57 |
#define ELF_ARCH EM_ALPHA
|
58 |
#define elf_check_arch(x) ((x) == EM_ALPHA)
|
59 |
#define ELF_USES_RELOCA
|
60 |
|
61 |
#elif defined(HOST_IA64)
|
62 |
|
63 |
#define ELF_CLASS ELFCLASS64
|
64 |
#define ELF_ARCH EM_IA_64
|
65 |
#define elf_check_arch(x) ((x) == EM_IA_64)
|
66 |
#define ELF_USES_RELOCA
|
67 |
|
68 |
#elif defined(HOST_SPARC)
|
69 |
|
70 |
#define ELF_CLASS ELFCLASS32
|
71 |
#define ELF_ARCH EM_SPARC
|
72 |
#define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
|
73 |
#define ELF_USES_RELOCA
|
74 |
|
75 |
#elif defined(HOST_SPARC64)
|
76 |
|
77 |
#define ELF_CLASS ELFCLASS64
|
78 |
#define ELF_ARCH EM_SPARCV9
|
79 |
#define elf_check_arch(x) ((x) == EM_SPARCV9)
|
80 |
#define ELF_USES_RELOCA
|
81 |
|
82 |
#else
|
83 |
#error unsupported CPU - please update the code
|
84 |
#endif
|
85 |
|
86 |
#include "elf.h" |
87 |
|
88 |
#if ELF_CLASS == ELFCLASS32
|
89 |
typedef int32_t host_long;
|
90 |
typedef uint32_t host_ulong;
|
91 |
#define swabls(x) swab32s(x)
|
92 |
#else
|
93 |
typedef int64_t host_long;
|
94 |
typedef uint64_t host_ulong;
|
95 |
#define swabls(x) swab64s(x)
|
96 |
#endif
|
97 |
|
98 |
#include "thunk.h" |
99 |
|
100 |
/* all dynamically generated functions begin with this code */
|
101 |
#define OP_PREFIX "op_" |
102 |
|
103 |
int elf_must_swap(struct elfhdr *h) |
104 |
{ |
105 |
union {
|
106 |
uint32_t i; |
107 |
uint8_t b[4];
|
108 |
} swaptest; |
109 |
|
110 |
swaptest.i = 1;
|
111 |
return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
|
112 |
(swaptest.b[0] == 0); |
113 |
} |
114 |
|
115 |
void swab16s(uint16_t *p)
|
116 |
{ |
117 |
*p = bswap16(*p); |
118 |
} |
119 |
|
120 |
void swab32s(uint32_t *p)
|
121 |
{ |
122 |
*p = bswap32(*p); |
123 |
} |
124 |
|
125 |
void swab64s(uint64_t *p)
|
126 |
{ |
127 |
*p = bswap64(*p); |
128 |
} |
129 |
|
130 |
void elf_swap_ehdr(struct elfhdr *h) |
131 |
{ |
132 |
swab16s(&h->e_type); /* Object file type */
|
133 |
swab16s(&h-> e_machine); /* Architecture */
|
134 |
swab32s(&h-> e_version); /* Object file version */
|
135 |
swabls(&h-> e_entry); /* Entry point virtual address */
|
136 |
swabls(&h-> e_phoff); /* Program header table file offset */
|
137 |
swabls(&h-> e_shoff); /* Section header table file offset */
|
138 |
swab32s(&h-> e_flags); /* Processor-specific flags */
|
139 |
swab16s(&h-> e_ehsize); /* ELF header size in bytes */
|
140 |
swab16s(&h-> e_phentsize); /* Program header table entry size */
|
141 |
swab16s(&h-> e_phnum); /* Program header table entry count */
|
142 |
swab16s(&h-> e_shentsize); /* Section header table entry size */
|
143 |
swab16s(&h-> e_shnum); /* Section header table entry count */
|
144 |
swab16s(&h-> e_shstrndx); /* Section header string table index */
|
145 |
} |
146 |
|
147 |
void elf_swap_shdr(struct elf_shdr *h) |
148 |
{ |
149 |
swab32s(&h-> sh_name); /* Section name (string tbl index) */
|
150 |
swab32s(&h-> sh_type); /* Section type */
|
151 |
swabls(&h-> sh_flags); /* Section flags */
|
152 |
swabls(&h-> sh_addr); /* Section virtual addr at execution */
|
153 |
swabls(&h-> sh_offset); /* Section file offset */
|
154 |
swabls(&h-> sh_size); /* Section size in bytes */
|
155 |
swab32s(&h-> sh_link); /* Link to another section */
|
156 |
swab32s(&h-> sh_info); /* Additional section information */
|
157 |
swabls(&h-> sh_addralign); /* Section alignment */
|
158 |
swabls(&h-> sh_entsize); /* Entry size if section holds table */
|
159 |
} |
160 |
|
161 |
void elf_swap_phdr(struct elf_phdr *h) |
162 |
{ |
163 |
swab32s(&h->p_type); /* Segment type */
|
164 |
swabls(&h->p_offset); /* Segment file offset */
|
165 |
swabls(&h->p_vaddr); /* Segment virtual address */
|
166 |
swabls(&h->p_paddr); /* Segment physical address */
|
167 |
swabls(&h->p_filesz); /* Segment size in file */
|
168 |
swabls(&h->p_memsz); /* Segment size in memory */
|
169 |
swab32s(&h->p_flags); /* Segment flags */
|
170 |
swabls(&h->p_align); /* Segment alignment */
|
171 |
} |
172 |
|
173 |
int do_swap;
|
174 |
|
175 |
uint16_t get16(uint16_t *p) |
176 |
{ |
177 |
uint16_t val; |
178 |
val = *p; |
179 |
if (do_swap)
|
180 |
val = bswap16(val); |
181 |
return val;
|
182 |
} |
183 |
|
184 |
uint32_t get32(uint32_t *p) |
185 |
{ |
186 |
uint32_t val; |
187 |
val = *p; |
188 |
if (do_swap)
|
189 |
val = bswap32(val); |
190 |
return val;
|
191 |
} |
192 |
|
193 |
void put16(uint16_t *p, uint16_t val)
|
194 |
{ |
195 |
if (do_swap)
|
196 |
val = bswap16(val); |
197 |
*p = val; |
198 |
} |
199 |
|
200 |
void put32(uint32_t *p, uint32_t val)
|
201 |
{ |
202 |
if (do_swap)
|
203 |
val = bswap32(val); |
204 |
*p = val; |
205 |
} |
206 |
|
207 |
void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
208 |
{ |
209 |
va_list ap; |
210 |
va_start(ap, fmt); |
211 |
fprintf(stderr, "dyngen: ");
|
212 |
vfprintf(stderr, fmt, ap); |
213 |
fprintf(stderr, "\n");
|
214 |
va_end(ap); |
215 |
exit(1);
|
216 |
} |
217 |
|
218 |
|
219 |
struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
220 |
const char *name) |
221 |
{ |
222 |
int i;
|
223 |
const char *shname; |
224 |
struct elf_shdr *sec;
|
225 |
|
226 |
for(i = 0; i < shnum; i++) { |
227 |
sec = &shdr[i]; |
228 |
if (!sec->sh_name)
|
229 |
continue;
|
230 |
shname = shstr + sec->sh_name; |
231 |
if (!strcmp(shname, name))
|
232 |
return sec;
|
233 |
} |
234 |
return NULL; |
235 |
} |
236 |
|
237 |
void *load_data(int fd, long offset, unsigned int size) |
238 |
{ |
239 |
char *data;
|
240 |
|
241 |
data = malloc(size); |
242 |
if (!data)
|
243 |
return NULL; |
244 |
lseek(fd, offset, SEEK_SET); |
245 |
if (read(fd, data, size) != size) {
|
246 |
free(data); |
247 |
return NULL; |
248 |
} |
249 |
return data;
|
250 |
} |
251 |
|
252 |
int strstart(const char *str, const char *val, const char **ptr) |
253 |
{ |
254 |
const char *p, *q; |
255 |
p = str; |
256 |
q = val; |
257 |
while (*q != '\0') { |
258 |
if (*p != *q)
|
259 |
return 0; |
260 |
p++; |
261 |
q++; |
262 |
} |
263 |
if (ptr)
|
264 |
*ptr = p; |
265 |
return 1; |
266 |
} |
267 |
|
268 |
#define MAX_ARGS 3 |
269 |
|
270 |
/* generate op code */
|
271 |
void gen_code(const char *name, host_ulong offset, host_ulong size, |
272 |
FILE *outfile, uint8_t *text, ELF_RELOC *relocs, int nb_relocs, int reloc_sh_type, |
273 |
ElfW(Sym) *symtab, char *strtab, int gen_switch) |
274 |
{ |
275 |
int copy_size = 0; |
276 |
uint8_t *p_start, *p_end; |
277 |
host_ulong start_offset; |
278 |
int nb_args, i, n;
|
279 |
uint8_t args_present[MAX_ARGS]; |
280 |
const char *sym_name, *p; |
281 |
ELF_RELOC *rel; |
282 |
|
283 |
/* Compute exact size excluding prologue and epilogue instructions.
|
284 |
* Increment start_offset to skip epilogue instructions, then compute
|
285 |
* copy_size the indicate the size of the remaining instructions (in
|
286 |
* bytes).
|
287 |
*/
|
288 |
p_start = text + offset; |
289 |
p_end = p_start + size; |
290 |
start_offset = offset; |
291 |
switch(ELF_ARCH) {
|
292 |
case EM_386:
|
293 |
{ |
294 |
uint8_t *p; |
295 |
p = p_end - 1;
|
296 |
if (p == p_start)
|
297 |
error("empty code for %s", name);
|
298 |
if (p[0] != 0xc3) |
299 |
error("ret expected at the end of %s", name);
|
300 |
copy_size = p - p_start; |
301 |
} |
302 |
break;
|
303 |
case EM_PPC:
|
304 |
{ |
305 |
uint8_t *p; |
306 |
p = (void *)(p_end - 4); |
307 |
if (p == p_start)
|
308 |
error("empty code for %s", name);
|
309 |
if (get32((uint32_t *)p) != 0x4e800020) |
310 |
error("blr expected at the end of %s", name);
|
311 |
copy_size = p - p_start; |
312 |
} |
313 |
break;
|
314 |
case EM_S390:
|
315 |
{ |
316 |
uint8_t *p; |
317 |
p = (void *)(p_end - 2); |
318 |
if (p == p_start)
|
319 |
error("empty code for %s", name);
|
320 |
if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4) |
321 |
error("br %%r14 expected at the end of %s", name);
|
322 |
copy_size = p - p_start; |
323 |
} |
324 |
break;
|
325 |
case EM_ALPHA:
|
326 |
{ |
327 |
uint8_t *p; |
328 |
p = p_end - 4;
|
329 |
if (p == p_start)
|
330 |
error("empty code for %s", name);
|
331 |
if (get32((uint32_t *)p) != 0x6bfa8001) |
332 |
error("ret expected at the end of %s", name);
|
333 |
copy_size = p - p_start; |
334 |
} |
335 |
break;
|
336 |
case EM_IA_64:
|
337 |
{ |
338 |
uint8_t *p; |
339 |
p = (void *)(p_end - 4); |
340 |
if (p == p_start)
|
341 |
error("empty code for %s", name);
|
342 |
/* br.ret.sptk.many b0;; */
|
343 |
/* 08 00 84 00 */
|
344 |
if (get32((uint32_t *)p) != 0x00840008) |
345 |
error("br.ret.sptk.many b0;; expected at the end of %s", name);
|
346 |
copy_size = p - p_start; |
347 |
} |
348 |
break;
|
349 |
case EM_SPARC:
|
350 |
case EM_SPARC32PLUS:
|
351 |
{ |
352 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
353 |
uint8_t *p; |
354 |
p = (void *)(p_end - 8); |
355 |
if (p <= p_start)
|
356 |
error("empty code for %s", name);
|
357 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
358 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
359 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
360 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
361 |
p_start += 0x4;
|
362 |
start_offset += 0x4;
|
363 |
if ((int)(start_insn | ~0x1fff) < -128) |
364 |
error("Found bogus save at the start of %s", name);
|
365 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
366 |
error("ret; restore; not found at end of %s", name);
|
367 |
} else {
|
368 |
error("No save at the beginning of %s", name);
|
369 |
} |
370 |
|
371 |
/* Skip a preceeding nop, if present. */
|
372 |
if (p > p_start) {
|
373 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
374 |
if (skip_insn == 0x01000000) |
375 |
p -= 4;
|
376 |
} |
377 |
|
378 |
copy_size = p - p_start; |
379 |
} |
380 |
break;
|
381 |
case EM_SPARCV9:
|
382 |
{ |
383 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
384 |
uint8_t *p; |
385 |
p = (void *)(p_end - 8); |
386 |
if (p <= p_start)
|
387 |
error("empty code for %s", name);
|
388 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
389 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
390 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
391 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
392 |
p_start += 0x4;
|
393 |
start_offset += 0x4;
|
394 |
if ((int)(start_insn | ~0x1fff) < -256) |
395 |
error("Found bogus save at the start of %s", name);
|
396 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
397 |
error("ret; restore; not found at end of %s", name);
|
398 |
} else {
|
399 |
error("No save at the beginning of %s", name);
|
400 |
} |
401 |
|
402 |
/* Skip a preceeding nop, if present. */
|
403 |
if (p > p_start) {
|
404 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
405 |
if (skip_insn == 0x01000000) |
406 |
p -= 4;
|
407 |
} |
408 |
|
409 |
copy_size = p - p_start; |
410 |
} |
411 |
break;
|
412 |
default:
|
413 |
error("unknown ELF architecture");
|
414 |
} |
415 |
|
416 |
/* compute the number of arguments by looking at the relocations */
|
417 |
for(i = 0;i < MAX_ARGS; i++) |
418 |
args_present[i] = 0;
|
419 |
|
420 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
421 |
if (rel->r_offset >= start_offset &&
|
422 |
rel->r_offset < start_offset + copy_size) { |
423 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
424 |
if (strstart(sym_name, "__op_param", &p)) { |
425 |
n = strtoul(p, NULL, 10); |
426 |
if (n >= MAX_ARGS)
|
427 |
error("too many arguments in %s", name);
|
428 |
args_present[n - 1] = 1; |
429 |
} |
430 |
} |
431 |
} |
432 |
|
433 |
nb_args = 0;
|
434 |
while (nb_args < MAX_ARGS && args_present[nb_args])
|
435 |
nb_args++; |
436 |
for(i = nb_args; i < MAX_ARGS; i++) {
|
437 |
if (args_present[i])
|
438 |
error("inconsistent argument numbering in %s", name);
|
439 |
} |
440 |
|
441 |
if (gen_switch == 2) { |
442 |
fprintf(outfile, "DEF(%s, %d)\n", name + 3, nb_args); |
443 |
} else if (gen_switch == 1) { |
444 |
|
445 |
/* output C code */
|
446 |
fprintf(outfile, "case INDEX_%s: {\n", name);
|
447 |
if (nb_args > 0) { |
448 |
fprintf(outfile, " long ");
|
449 |
for(i = 0; i < nb_args; i++) { |
450 |
if (i != 0) |
451 |
fprintf(outfile, ", ");
|
452 |
fprintf(outfile, "param%d", i + 1); |
453 |
} |
454 |
fprintf(outfile, ";\n");
|
455 |
} |
456 |
fprintf(outfile, " extern void %s();\n", name);
|
457 |
|
458 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
459 |
if (rel->r_offset >= start_offset &&
|
460 |
rel->r_offset < start_offset + copy_size) { |
461 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
462 |
if (*sym_name && !strstart(sym_name, "__op_param", &p)) { |
463 |
#if defined(HOST_SPARC)
|
464 |
if (sym_name[0] == '.') { |
465 |
fprintf(outfile, |
466 |
"extern char __dot_%s __asm__(\"%s\");\n",
|
467 |
sym_name+1, sym_name);
|
468 |
continue;
|
469 |
} |
470 |
#endif
|
471 |
fprintf(outfile, "extern char %s;\n", sym_name);
|
472 |
} |
473 |
} |
474 |
} |
475 |
|
476 |
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
|
477 |
for(i = 0; i < nb_args; i++) { |
478 |
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
479 |
} |
480 |
|
481 |
/* patch relocations */
|
482 |
#if defined(HOST_I386)
|
483 |
{ |
484 |
char name[256]; |
485 |
int type;
|
486 |
int addend;
|
487 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
488 |
if (rel->r_offset >= start_offset &&
|
489 |
rel->r_offset < start_offset + copy_size) { |
490 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
491 |
if (strstart(sym_name, "__op_param", &p)) { |
492 |
snprintf(name, sizeof(name), "param%s", p); |
493 |
} else {
|
494 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
495 |
} |
496 |
type = ELF32_R_TYPE(rel->r_info); |
497 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
498 |
switch(type) {
|
499 |
case R_386_32:
|
500 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
501 |
rel->r_offset - start_offset, name, addend); |
502 |
break;
|
503 |
case R_386_PC32:
|
504 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
505 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
506 |
break;
|
507 |
default:
|
508 |
error("unsupported i386 relocation (%d)", type);
|
509 |
} |
510 |
} |
511 |
} |
512 |
} |
513 |
#elif defined(HOST_PPC)
|
514 |
{ |
515 |
char name[256]; |
516 |
int type;
|
517 |
int addend;
|
518 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
519 |
if (rel->r_offset >= start_offset &&
|
520 |
rel->r_offset < start_offset + copy_size) { |
521 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
522 |
if (strstart(sym_name, "__op_param", &p)) { |
523 |
snprintf(name, sizeof(name), "param%s", p); |
524 |
} else {
|
525 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
526 |
} |
527 |
type = ELF32_R_TYPE(rel->r_info); |
528 |
addend = rel->r_addend; |
529 |
switch(type) {
|
530 |
case R_PPC_ADDR32:
|
531 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
532 |
rel->r_offset - start_offset, name, addend); |
533 |
break;
|
534 |
case R_PPC_ADDR16_LO:
|
535 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
536 |
rel->r_offset - start_offset, name, addend); |
537 |
break;
|
538 |
case R_PPC_ADDR16_HI:
|
539 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
540 |
rel->r_offset - start_offset, name, addend); |
541 |
break;
|
542 |
case R_PPC_ADDR16_HA:
|
543 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
544 |
rel->r_offset - start_offset, name, addend); |
545 |
break;
|
546 |
case R_PPC_REL24:
|
547 |
/* warning: must be at 32 MB distancy */
|
548 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
549 |
rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
550 |
break;
|
551 |
default:
|
552 |
error("unsupported powerpc relocation (%d)", type);
|
553 |
} |
554 |
} |
555 |
} |
556 |
} |
557 |
#elif defined(HOST_S390)
|
558 |
{ |
559 |
char name[256]; |
560 |
int type;
|
561 |
int addend;
|
562 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
563 |
if (rel->r_offset >= start_offset &&
|
564 |
rel->r_offset < start_offset + copy_size) { |
565 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
566 |
if (strstart(sym_name, "__op_param", &p)) { |
567 |
snprintf(name, sizeof(name), "param%s", p); |
568 |
} else {
|
569 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
570 |
} |
571 |
type = ELF32_R_TYPE(rel->r_info); |
572 |
addend = rel->r_addend; |
573 |
switch(type) {
|
574 |
case R_390_32:
|
575 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
576 |
rel->r_offset - start_offset, name, addend); |
577 |
break;
|
578 |
case R_390_16:
|
579 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
580 |
rel->r_offset - start_offset, name, addend); |
581 |
break;
|
582 |
case R_390_8:
|
583 |
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
584 |
rel->r_offset - start_offset, name, addend); |
585 |
break;
|
586 |
default:
|
587 |
error("unsupported s390 relocation (%d)", type);
|
588 |
} |
589 |
} |
590 |
} |
591 |
} |
592 |
#elif defined(HOST_ALPHA)
|
593 |
{ |
594 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
595 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
596 |
int type;
|
597 |
|
598 |
type = ELF64_R_TYPE(rel->r_info); |
599 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
600 |
switch (type) {
|
601 |
case R_ALPHA_GPDISP:
|
602 |
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
|
603 |
as an immediate instead of constructing it from the pv or ra. */
|
604 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
|
605 |
rel->r_offset - start_offset); |
606 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
607 |
rel->r_offset - start_offset + rel->r_addend); |
608 |
break;
|
609 |
case R_ALPHA_LITUSE:
|
610 |
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
|
611 |
now, since some called functions (libc) need pv to be set up. */
|
612 |
break;
|
613 |
case R_ALPHA_HINT:
|
614 |
/* Branch target prediction hint. Ignore for now. Should be already
|
615 |
correct for in-function jumps. */
|
616 |
break;
|
617 |
case R_ALPHA_LITERAL:
|
618 |
/* Load a literal from the GOT relative to the gp. Since there's only a
|
619 |
single gp, nothing is to be done. */
|
620 |
break;
|
621 |
case R_ALPHA_GPRELHIGH:
|
622 |
/* Handle fake relocations against __op_param symbol. Need to emit the
|
623 |
high part of the immediate value instead. Other symbols need no
|
624 |
special treatment. */
|
625 |
if (strstart(sym_name, "__op_param", &p)) |
626 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
|
627 |
rel->r_offset - start_offset, p); |
628 |
break;
|
629 |
case R_ALPHA_GPRELLOW:
|
630 |
if (strstart(sym_name, "__op_param", &p)) |
631 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
632 |
rel->r_offset - start_offset, p); |
633 |
break;
|
634 |
case R_ALPHA_BRSGP:
|
635 |
/* PC-relative jump. Tweak offset to skip the two instructions that try to
|
636 |
set up the gp from the pv. */
|
637 |
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld) + 4);\n",
|
638 |
rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset); |
639 |
break;
|
640 |
default:
|
641 |
error("unsupported Alpha relocation (%d)", type);
|
642 |
} |
643 |
} |
644 |
} |
645 |
} |
646 |
#elif defined(HOST_IA64)
|
647 |
{ |
648 |
char name[256]; |
649 |
int type;
|
650 |
int addend;
|
651 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
652 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
653 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
654 |
if (strstart(sym_name, "__op_param", &p)) { |
655 |
snprintf(name, sizeof(name), "param%s", p); |
656 |
} else {
|
657 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
658 |
} |
659 |
type = ELF64_R_TYPE(rel->r_info); |
660 |
addend = rel->r_addend; |
661 |
switch(type) {
|
662 |
case R_IA64_LTOFF22:
|
663 |
error("must implemnt R_IA64_LTOFF22 relocation");
|
664 |
case R_IA64_PCREL21B:
|
665 |
error("must implemnt R_IA64_PCREL21B relocation");
|
666 |
default:
|
667 |
error("unsupported ia64 relocation (%d)", type);
|
668 |
} |
669 |
} |
670 |
} |
671 |
} |
672 |
#elif defined(HOST_SPARC)
|
673 |
{ |
674 |
char name[256]; |
675 |
int type;
|
676 |
int addend;
|
677 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
678 |
if (rel->r_offset >= start_offset &&
|
679 |
rel->r_offset < start_offset + copy_size) { |
680 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
681 |
if (strstart(sym_name, "__op_param", &p)) { |
682 |
snprintf(name, sizeof(name), "param%s", p); |
683 |
} else {
|
684 |
if (sym_name[0] == '.') |
685 |
snprintf(name, sizeof(name),
|
686 |
"(long)(&__dot_%s)",
|
687 |
sym_name + 1);
|
688 |
else
|
689 |
snprintf(name, sizeof(name),
|
690 |
"(long)(&%s)", sym_name);
|
691 |
} |
692 |
type = ELF32_R_TYPE(rel->r_info); |
693 |
addend = rel->r_addend; |
694 |
switch(type) {
|
695 |
case R_SPARC_32:
|
696 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
697 |
rel->r_offset - start_offset, name, addend); |
698 |
break;
|
699 |
case R_SPARC_HI22:
|
700 |
fprintf(outfile, |
701 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
702 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
703 |
" & ~0x3fffff) "
|
704 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
705 |
rel->r_offset - start_offset, |
706 |
rel->r_offset - start_offset, |
707 |
name, addend); |
708 |
break;
|
709 |
case R_SPARC_LO10:
|
710 |
fprintf(outfile, |
711 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
712 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
713 |
" & ~0x3ff) "
|
714 |
" | ((%s + %d) & 0x3ff);\n",
|
715 |
rel->r_offset - start_offset, |
716 |
rel->r_offset - start_offset, |
717 |
name, addend); |
718 |
break;
|
719 |
case R_SPARC_WDISP30:
|
720 |
fprintf(outfile, |
721 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
722 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
723 |
" & ~0x3fffffff) "
|
724 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
725 |
" & 0x3fffffff);\n",
|
726 |
rel->r_offset - start_offset, |
727 |
rel->r_offset - start_offset, |
728 |
name, addend, |
729 |
rel->r_offset - start_offset); |
730 |
break;
|
731 |
default:
|
732 |
error("unsupported sparc relocation (%d)", type);
|
733 |
} |
734 |
} |
735 |
} |
736 |
} |
737 |
#elif defined(HOST_SPARC64)
|
738 |
{ |
739 |
char name[256]; |
740 |
int type;
|
741 |
int addend;
|
742 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
743 |
if (rel->r_offset >= start_offset &&
|
744 |
rel->r_offset < start_offset + copy_size) { |
745 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
746 |
if (strstart(sym_name, "__op_param", &p)) { |
747 |
snprintf(name, sizeof(name), "param%s", p); |
748 |
} else {
|
749 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
750 |
} |
751 |
type = ELF64_R_TYPE(rel->r_info); |
752 |
addend = rel->r_addend; |
753 |
switch(type) {
|
754 |
case R_SPARC_32:
|
755 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
756 |
rel->r_offset - start_offset, name, addend); |
757 |
break;
|
758 |
case R_SPARC_HI22:
|
759 |
fprintf(outfile, |
760 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
761 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
762 |
" & ~0x3fffff) "
|
763 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
764 |
rel->r_offset - start_offset, |
765 |
rel->r_offset - start_offset, |
766 |
name, addend); |
767 |
break;
|
768 |
case R_SPARC_LO10:
|
769 |
fprintf(outfile, |
770 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
771 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
772 |
" & ~0x3ff) "
|
773 |
" | ((%s + %d) & 0x3ff);\n",
|
774 |
rel->r_offset - start_offset, |
775 |
rel->r_offset - start_offset, |
776 |
name, addend); |
777 |
break;
|
778 |
case R_SPARC_WDISP30:
|
779 |
fprintf(outfile, |
780 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
781 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
782 |
" & ~0x3fffffff) "
|
783 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
784 |
" & 0x3fffffff);\n",
|
785 |
rel->r_offset - start_offset, |
786 |
rel->r_offset - start_offset, |
787 |
name, addend, |
788 |
rel->r_offset - start_offset); |
789 |
break;
|
790 |
default:
|
791 |
error("unsupported sparc64 relocation (%d)", type);
|
792 |
} |
793 |
} |
794 |
} |
795 |
} |
796 |
#else
|
797 |
#error unsupported CPU
|
798 |
#endif
|
799 |
fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
|
800 |
fprintf(outfile, "}\n");
|
801 |
fprintf(outfile, "break;\n\n");
|
802 |
} else {
|
803 |
fprintf(outfile, "static inline void gen_%s(", name);
|
804 |
if (nb_args == 0) { |
805 |
fprintf(outfile, "void");
|
806 |
} else {
|
807 |
for(i = 0; i < nb_args; i++) { |
808 |
if (i != 0) |
809 |
fprintf(outfile, ", ");
|
810 |
fprintf(outfile, "long param%d", i + 1); |
811 |
} |
812 |
} |
813 |
fprintf(outfile, ")\n");
|
814 |
fprintf(outfile, "{\n");
|
815 |
for(i = 0; i < nb_args; i++) { |
816 |
fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
817 |
} |
818 |
fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
|
819 |
fprintf(outfile, "}\n\n");
|
820 |
} |
821 |
} |
822 |
|
823 |
/* load an elf object file */
|
824 |
int load_elf(const char *filename, FILE *outfile, int do_print_enum) |
825 |
{ |
826 |
int fd;
|
827 |
struct elfhdr ehdr;
|
828 |
struct elf_shdr *sec, *shdr, *symtab_sec, *strtab_sec, *text_sec;
|
829 |
int i, j, nb_syms;
|
830 |
ElfW(Sym) *symtab, *sym; |
831 |
char *shstr, *strtab;
|
832 |
uint8_t *text; |
833 |
void *relocs;
|
834 |
int nb_relocs, reloc_sh_type;
|
835 |
|
836 |
fd = open(filename, O_RDONLY); |
837 |
if (fd < 0) |
838 |
error("can't open file '%s'", filename);
|
839 |
|
840 |
/* Read ELF header. */
|
841 |
if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
842 |
error("unable to read file header");
|
843 |
|
844 |
/* Check ELF identification. */
|
845 |
if (ehdr.e_ident[EI_MAG0] != ELFMAG0
|
846 |
|| ehdr.e_ident[EI_MAG1] != ELFMAG1 |
847 |
|| ehdr.e_ident[EI_MAG2] != ELFMAG2 |
848 |
|| ehdr.e_ident[EI_MAG3] != ELFMAG3 |
849 |
|| ehdr.e_ident[EI_VERSION] != EV_CURRENT) { |
850 |
error("bad ELF header");
|
851 |
} |
852 |
|
853 |
do_swap = elf_must_swap(&ehdr); |
854 |
if (do_swap)
|
855 |
elf_swap_ehdr(&ehdr); |
856 |
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
|
857 |
error("Unsupported ELF class");
|
858 |
if (ehdr.e_type != ET_REL)
|
859 |
error("ELF object file expected");
|
860 |
if (ehdr.e_version != EV_CURRENT)
|
861 |
error("Invalid ELF version");
|
862 |
if (!elf_check_arch(ehdr.e_machine))
|
863 |
error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
|
864 |
|
865 |
/* read section headers */
|
866 |
shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
867 |
if (do_swap) {
|
868 |
for(i = 0; i < ehdr.e_shnum; i++) { |
869 |
elf_swap_shdr(&shdr[i]); |
870 |
} |
871 |
} |
872 |
|
873 |
sec = &shdr[ehdr.e_shstrndx]; |
874 |
shstr = load_data(fd, sec->sh_offset, sec->sh_size); |
875 |
|
876 |
/* text section */
|
877 |
|
878 |
text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
|
879 |
if (!text_sec)
|
880 |
error("could not find .text section");
|
881 |
text = load_data(fd, text_sec->sh_offset, text_sec->sh_size); |
882 |
|
883 |
/* find text relocations, if any */
|
884 |
nb_relocs = 0;
|
885 |
relocs = NULL;
|
886 |
reloc_sh_type = 0;
|
887 |
for(i = 0; i < ehdr.e_shnum; i++) { |
888 |
sec = &shdr[i]; |
889 |
if ((sec->sh_type == SHT_REL || sec->sh_type == SHT_RELA) &&
|
890 |
sec->sh_info == (text_sec - shdr)) { |
891 |
reloc_sh_type = sec->sh_type; |
892 |
relocs = load_data(fd, sec->sh_offset, sec->sh_size); |
893 |
nb_relocs = sec->sh_size / sec->sh_entsize; |
894 |
if (do_swap) {
|
895 |
if (sec->sh_type == SHT_REL) {
|
896 |
ElfW(Rel) *rel = relocs; |
897 |
for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) { |
898 |
swabls(&rel->r_offset); |
899 |
swabls(&rel->r_info); |
900 |
} |
901 |
} else {
|
902 |
ElfW(Rela) *rel = relocs; |
903 |
for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) { |
904 |
swabls(&rel->r_offset); |
905 |
swabls(&rel->r_info); |
906 |
swabls(&rel->r_addend); |
907 |
} |
908 |
} |
909 |
} |
910 |
break;
|
911 |
} |
912 |
} |
913 |
|
914 |
symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
|
915 |
if (!symtab_sec)
|
916 |
error("could not find .symtab section");
|
917 |
strtab_sec = &shdr[symtab_sec->sh_link]; |
918 |
|
919 |
symtab = load_data(fd, symtab_sec->sh_offset, symtab_sec->sh_size); |
920 |
strtab = load_data(fd, strtab_sec->sh_offset, strtab_sec->sh_size); |
921 |
|
922 |
nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
|
923 |
if (do_swap) {
|
924 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
925 |
swab32s(&sym->st_name); |
926 |
swabls(&sym->st_value); |
927 |
swabls(&sym->st_size); |
928 |
swab16s(&sym->st_shndx); |
929 |
} |
930 |
} |
931 |
|
932 |
if (do_print_enum) {
|
933 |
fprintf(outfile, "DEF(end, 0)\n");
|
934 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
935 |
const char *name, *p; |
936 |
name = strtab + sym->st_name; |
937 |
if (strstart(name, OP_PREFIX, &p)) {
|
938 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
939 |
text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 2);
|
940 |
} |
941 |
} |
942 |
} else {
|
943 |
/* generate big code generation switch */
|
944 |
#ifdef HOST_ALPHA
|
945 |
fprintf(outfile, |
946 |
"register int gp asm(\"$29\");\n"
|
947 |
"static inline void immediate_ldah(void *p, int val) {\n"
|
948 |
" uint32_t *dest = p;\n"
|
949 |
" long high = ((val >> 16) + ((val >> 15) & 1)) & 0xffff;\n"
|
950 |
"\n"
|
951 |
" *dest &= ~0xffff;\n"
|
952 |
" *dest |= high;\n"
|
953 |
" *dest |= 31 << 16;\n"
|
954 |
"}\n"
|
955 |
"static inline void immediate_lda(void *dest, int val) {\n"
|
956 |
" *(uint16_t *) dest = val;\n"
|
957 |
"}\n"
|
958 |
"void fix_bsr(void *p, int offset) {\n"
|
959 |
" uint32_t *dest = p;\n"
|
960 |
" *dest &= ~((1 << 21) - 1);\n"
|
961 |
" *dest |= (offset >> 2) & ((1 << 21) - 1);\n"
|
962 |
"}\n");
|
963 |
#endif
|
964 |
fprintf(outfile, |
965 |
"int dyngen_code(uint8_t *gen_code_buf,\n"
|
966 |
" const uint16_t *opc_buf, const uint32_t *opparam_buf)\n"
|
967 |
"{\n"
|
968 |
" uint8_t *gen_code_ptr;\n"
|
969 |
" const uint16_t *opc_ptr;\n"
|
970 |
" const uint32_t *opparam_ptr;\n"
|
971 |
" gen_code_ptr = gen_code_buf;\n"
|
972 |
" opc_ptr = opc_buf;\n"
|
973 |
" opparam_ptr = opparam_buf;\n");
|
974 |
|
975 |
/* Generate prologue, if needed. */
|
976 |
switch(ELF_ARCH) {
|
977 |
case EM_SPARC:
|
978 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c23a080; /* sub %%sp, 128, %%sp */\n");
|
979 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc27a080; /* sub %%fp, 128, %%fp */\n");
|
980 |
break;
|
981 |
|
982 |
case EM_SPARCV9:
|
983 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c23a100; /* sub %%sp, 256, %%sp */\n");
|
984 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc27a100; /* sub %%fp, 256, %%fp */\n");
|
985 |
break;
|
986 |
}; |
987 |
|
988 |
fprintf(outfile, |
989 |
" for(;;) {\n"
|
990 |
" switch(*opc_ptr++) {\n"
|
991 |
); |
992 |
|
993 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
994 |
const char *name; |
995 |
name = strtab + sym->st_name; |
996 |
if (strstart(name, OP_PREFIX, NULL)) { |
997 |
#if 0
|
998 |
printf("%4d: %s pos=0x%08x len=%d\n",
|
999 |
i, name, sym->st_value, sym->st_size);
|
1000 |
#endif
|
1001 |
if (sym->st_shndx != (text_sec - shdr))
|
1002 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
1003 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
1004 |
text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 1);
|
1005 |
} |
1006 |
} |
1007 |
|
1008 |
fprintf(outfile, |
1009 |
" default:\n"
|
1010 |
" goto the_end;\n"
|
1011 |
" }\n"
|
1012 |
" }\n"
|
1013 |
" the_end:\n"
|
1014 |
); |
1015 |
|
1016 |
/* generate epilogue */
|
1017 |
switch(ELF_ARCH) {
|
1018 |
case EM_386:
|
1019 |
fprintf(outfile, "*gen_code_ptr++ = 0xc3; /* ret */\n");
|
1020 |
break;
|
1021 |
case EM_PPC:
|
1022 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x4e800020; /* blr */\n");
|
1023 |
break;
|
1024 |
case EM_S390:
|
1025 |
fprintf(outfile, "*((uint16_t *)gen_code_ptr)++ = 0x07fe; /* br %%r14 */\n");
|
1026 |
break;
|
1027 |
case EM_ALPHA:
|
1028 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x6bfa8001; /* ret */\n");
|
1029 |
break;
|
1030 |
case EM_IA_64:
|
1031 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x00840008; /* br.ret.sptk.many b0;; */\n");
|
1032 |
break;
|
1033 |
case EM_SPARC:
|
1034 |
case EM_SPARC32PLUS:
|
1035 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc07a080; /* add %%fp, 256, %%fp */\n");
|
1036 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c62008; /* jmpl %%i0 + 8, %%g0 */\n");
|
1037 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c03a080; /* add %%sp, 256, %%sp */\n");
|
1038 |
break;
|
1039 |
case EM_SPARCV9:
|
1040 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c7e008; /* ret */\n");
|
1041 |
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81e80000; /* restore */\n");
|
1042 |
break;
|
1043 |
default:
|
1044 |
error("unknown ELF architecture");
|
1045 |
} |
1046 |
|
1047 |
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
|
1048 |
fprintf(outfile, "}\n\n");
|
1049 |
|
1050 |
/* generate gen_xxx functions */
|
1051 |
/* XXX: suppress the use of these functions to simplify code */
|
1052 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1053 |
const char *name; |
1054 |
name = strtab + sym->st_name; |
1055 |
if (strstart(name, OP_PREFIX, NULL)) { |
1056 |
if (sym->st_shndx != (text_sec - shdr))
|
1057 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
1058 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
1059 |
text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 0);
|
1060 |
} |
1061 |
} |
1062 |
} |
1063 |
|
1064 |
close(fd); |
1065 |
return 0; |
1066 |
} |
1067 |
|
1068 |
void usage(void) |
1069 |
{ |
1070 |
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
1071 |
"usage: dyngen [-o outfile] [-c] objfile\n"
|
1072 |
"Generate a dynamic code generator from an object file\n"
|
1073 |
"-c output enum of operations\n"
|
1074 |
); |
1075 |
exit(1);
|
1076 |
} |
1077 |
|
1078 |
int main(int argc, char **argv) |
1079 |
{ |
1080 |
int c, do_print_enum;
|
1081 |
const char *filename, *outfilename; |
1082 |
FILE *outfile; |
1083 |
|
1084 |
outfilename = "out.c";
|
1085 |
do_print_enum = 0;
|
1086 |
for(;;) {
|
1087 |
c = getopt(argc, argv, "ho:c");
|
1088 |
if (c == -1) |
1089 |
break;
|
1090 |
switch(c) {
|
1091 |
case 'h': |
1092 |
usage(); |
1093 |
break;
|
1094 |
case 'o': |
1095 |
outfilename = optarg; |
1096 |
break;
|
1097 |
case 'c': |
1098 |
do_print_enum = 1;
|
1099 |
break;
|
1100 |
} |
1101 |
} |
1102 |
if (optind >= argc)
|
1103 |
usage(); |
1104 |
filename = argv[optind]; |
1105 |
outfile = fopen(outfilename, "w");
|
1106 |
if (!outfile)
|
1107 |
error("could not open '%s'", outfilename);
|
1108 |
load_elf(filename, outfile, do_print_enum); |
1109 |
fclose(outfile); |
1110 |
return 0; |
1111 |
} |