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7d13299d FB |
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 | */ | |
367e86e8 FB |
20 | #include <stdlib.h> |
21 | #include <stdio.h> | |
04369ff2 | 22 | #include <string.h> |
367e86e8 FB |
23 | #include <stdarg.h> |
24 | #include <inttypes.h> | |
367e86e8 FB |
25 | #include <unistd.h> |
26 | #include <fcntl.h> | |
27 | ||
ce11fedc FB |
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 | |
367e86e8 | 53 | |
ce11fedc FB |
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 | ||
efdea7bf FB |
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 | ||
d014c98c FB |
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 | ||
ce11fedc FB |
82 | #else |
83 | #error unsupported CPU - please update the code | |
84 | #endif | |
85 | ||
efdea7bf FB |
86 | #include "elf.h" |
87 | ||
ce11fedc FB |
88 | #if ELF_CLASS == ELFCLASS32 |
89 | typedef int32_t host_long; | |
90 | typedef uint32_t host_ulong; | |
efdea7bf | 91 | #define swabls(x) swab32s(x) |
ce11fedc FB |
92 | #else |
93 | typedef int64_t host_long; | |
94 | typedef uint64_t host_ulong; | |
efdea7bf | 95 | #define swabls(x) swab64s(x) |
fb3e5849 FB |
96 | #endif |
97 | ||
ce11fedc FB |
98 | #include "thunk.h" |
99 | ||
367e86e8 | 100 | /* all dynamically generated functions begin with this code */ |
dc99065b | 101 | #define OP_PREFIX "op_" |
367e86e8 | 102 | |
ce11fedc | 103 | int elf_must_swap(struct elfhdr *h) |
367e86e8 FB |
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 | ||
ce11fedc | 125 | void swab64s(uint64_t *p) |
367e86e8 FB |
126 | { |
127 | *p = bswap64(*p); | |
128 | } | |
129 | ||
ce11fedc | 130 | void elf_swap_ehdr(struct elfhdr *h) |
367e86e8 FB |
131 | { |
132 | swab16s(&h->e_type); /* Object file type */ | |
133 | swab16s(&h-> e_machine); /* Architecture */ | |
134 | swab32s(&h-> e_version); /* Object file version */ | |
ce11fedc FB |
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 */ | |
367e86e8 FB |
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 | ||
ce11fedc | 147 | void elf_swap_shdr(struct elf_shdr *h) |
367e86e8 FB |
148 | { |
149 | swab32s(&h-> sh_name); /* Section name (string tbl index) */ | |
150 | swab32s(&h-> sh_type); /* Section type */ | |
ce11fedc FB |
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 */ | |
367e86e8 FB |
155 | swab32s(&h-> sh_link); /* Link to another section */ |
156 | swab32s(&h-> sh_info); /* Additional section information */ | |
ce11fedc FB |
157 | swabls(&h-> sh_addralign); /* Section alignment */ |
158 | swabls(&h-> sh_entsize); /* Entry size if section holds table */ | |
367e86e8 FB |
159 | } |
160 | ||
ce11fedc | 161 | void elf_swap_phdr(struct elf_phdr *h) |
367e86e8 FB |
162 | { |
163 | swab32s(&h->p_type); /* Segment type */ | |
ce11fedc FB |
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 */ | |
367e86e8 | 169 | swab32s(&h->p_flags); /* Segment flags */ |
ce11fedc | 170 | swabls(&h->p_align); /* Segment alignment */ |
367e86e8 FB |
171 | } |
172 | ||
173 | int do_swap; | |
367e86e8 FB |
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 | ||
efdea7bf | 207 | void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
367e86e8 FB |
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 | ||
ce11fedc FB |
219 | struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
220 | const char *name) | |
367e86e8 FB |
221 | { |
222 | int i; | |
223 | const char *shname; | |
ce11fedc | 224 | struct elf_shdr *sec; |
367e86e8 FB |
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 */ | |
ce11fedc FB |
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) | |
367e86e8 FB |
274 | { |
275 | int copy_size = 0; | |
276 | uint8_t *p_start, *p_end; | |
ae228531 | 277 | host_ulong start_offset; |
ce11fedc | 278 | int nb_args, i, n; |
367e86e8 FB |
279 | uint8_t args_present[MAX_ARGS]; |
280 | const char *sym_name, *p; | |
ce11fedc | 281 | ELF_RELOC *rel; |
367e86e8 | 282 | |
ae228531 FB |
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 | */ | |
367e86e8 FB |
288 | p_start = text + offset; |
289 | p_end = p_start + size; | |
ae228531 | 290 | start_offset = offset; |
ce11fedc | 291 | switch(ELF_ARCH) { |
367e86e8 FB |
292 | case EM_386: |
293 | { | |
294 | uint8_t *p; | |
295 | p = p_end - 1; | |
367e86e8 FB |
296 | if (p == p_start) |
297 | error("empty code for %s", name); | |
4b74fe1f FB |
298 | if (p[0] != 0xc3) |
299 | error("ret expected at the end of %s", name); | |
367e86e8 FB |
300 | copy_size = p - p_start; |
301 | } | |
302 | break; | |
303 | case EM_PPC: | |
304 | { | |
305 | uint8_t *p; | |
306 | p = (void *)(p_end - 4); | |
367e86e8 FB |
307 | if (p == p_start) |
308 | error("empty code for %s", name); | |
04369ff2 FB |
309 | if (get32((uint32_t *)p) != 0x4e800020) |
310 | error("blr expected at the end of %s", name); | |
367e86e8 FB |
311 | copy_size = p - p_start; |
312 | } | |
313 | break; | |
fb3e5849 FB |
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) | |
efdea7bf | 321 | error("br %%r14 expected at the end of %s", name); |
fb3e5849 FB |
322 | copy_size = p - p_start; |
323 | } | |
324 | break; | |
efdea7bf FB |
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; | |
d014c98c FB |
349 | case EM_SPARC: |
350 | case EM_SPARC32PLUS: | |
351 | { | |
ae228531 | 352 | uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
d014c98c FB |
353 | uint8_t *p; |
354 | p = (void *)(p_end - 8); | |
355 | if (p <= p_start) | |
356 | error("empty code for %s", name); | |
ae228531 FB |
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 | } | |
d014c98c FB |
377 | |
378 | copy_size = p - p_start; | |
379 | } | |
380 | break; | |
381 | case EM_SPARCV9: | |
382 | { | |
ae228531 | 383 | uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
d014c98c FB |
384 | uint8_t *p; |
385 | p = (void *)(p_end - 8); | |
386 | if (p <= p_start) | |
387 | error("empty code for %s", name); | |
ae228531 FB |
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 | ||
d014c98c FB |
409 | copy_size = p - p_start; |
410 | } | |
411 | break; | |
efdea7bf FB |
412 | default: |
413 | error("unknown ELF architecture"); | |
367e86e8 FB |
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 | ||
ce11fedc | 420 | for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
ae228531 FB |
421 | if (rel->r_offset >= start_offset && |
422 | rel->r_offset < start_offset + copy_size) { | |
ce11fedc FB |
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; | |
367e86e8 FB |
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 | ||
0ea00c9a FB |
441 | if (gen_switch == 2) { |
442 | fprintf(outfile, "DEF(%s, %d)\n", name + 3, nb_args); | |
443 | } else if (gen_switch == 1) { | |
dc99065b FB |
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"); | |
367e86e8 | 455 | } |
dc99065b FB |
456 | fprintf(outfile, " extern void %s();\n", name); |
457 | ||
ce11fedc | 458 | for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
ae228531 FB |
459 | if (rel->r_offset >= start_offset && |
460 | rel->r_offset < start_offset + copy_size) { | |
efdea7bf | 461 | sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
74c95119 | 462 | if (*sym_name && !strstart(sym_name, "__op_param", &p)) { |
d014c98c FB |
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 | |
ce11fedc | 471 | fprintf(outfile, "extern char %s;\n", sym_name); |
dc99065b FB |
472 | } |
473 | } | |
474 | } | |
475 | ||
ae228531 | 476 | fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size); |
dc99065b FB |
477 | for(i = 0; i < nb_args; i++) { |
478 | fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); | |
479 | } | |
480 | ||
481 | /* patch relocations */ | |
ce11fedc | 482 | #if defined(HOST_I386) |
dc99065b | 483 | { |
dc99065b FB |
484 | char name[256]; |
485 | int type; | |
ce11fedc | 486 | int addend; |
dc99065b | 487 | for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
ae228531 FB |
488 | if (rel->r_offset >= start_offset && |
489 | rel->r_offset < start_offset + copy_size) { | |
efdea7bf | 490 | sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
367e86e8 FB |
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: | |
ce11fedc | 500 | fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
ae228531 | 501 | rel->r_offset - start_offset, name, addend); |
367e86e8 FB |
502 | break; |
503 | case R_386_PC32: | |
ce11fedc | 504 | fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n", |
ae228531 | 505 | rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
367e86e8 FB |
506 | break; |
507 | default: | |
508 | error("unsupported i386 relocation (%d)", type); | |
509 | } | |
510 | } | |
dc99065b FB |
511 | } |
512 | } | |
ce11fedc | 513 | #elif defined(HOST_PPC) |
04369ff2 | 514 | { |
04369ff2 FB |
515 | char name[256]; |
516 | int type; | |
ce11fedc | 517 | int addend; |
04369ff2 | 518 | for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
ae228531 FB |
519 | if (rel->r_offset >= start_offset && |
520 | rel->r_offset < start_offset + copy_size) { | |
efdea7bf | 521 | sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
04369ff2 FB |
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: | |
ce11fedc | 531 | fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
ae228531 | 532 | rel->r_offset - start_offset, name, addend); |
04369ff2 FB |
533 | break; |
534 | case R_PPC_ADDR16_LO: | |
ce11fedc | 535 | fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n", |
ae228531 | 536 | rel->r_offset - start_offset, name, addend); |
04369ff2 FB |
537 | break; |
538 | case R_PPC_ADDR16_HI: | |
ce11fedc | 539 | fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n", |
ae228531 | 540 | rel->r_offset - start_offset, name, addend); |
04369ff2 FB |
541 | break; |
542 | case R_PPC_ADDR16_HA: | |
ce11fedc | 543 | fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n", |
ae228531 | 544 | rel->r_offset - start_offset, name, addend); |
04369ff2 FB |
545 | break; |
546 | case R_PPC_REL24: | |
547 | /* warning: must be at 32 MB distancy */ | |
ce11fedc | 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", |
ae228531 | 549 | rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
04369ff2 FB |
550 | break; |
551 | default: | |
552 | error("unsupported powerpc relocation (%d)", type); | |
553 | } | |
554 | } | |
555 | } | |
556 | } | |
ce11fedc | 557 | #elif defined(HOST_S390) |
fb3e5849 | 558 | { |
fb3e5849 FB |
559 | char name[256]; |
560 | int type; | |
ce11fedc | 561 | int addend; |
fb3e5849 | 562 | for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
ae228531 FB |
563 | if (rel->r_offset >= start_offset && |
564 | rel->r_offset < start_offset + copy_size) { | |
efdea7bf | 565 | sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
fb3e5849 FB |
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: | |
ce11fedc | 575 | fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
ae228531 | 576 | rel->r_offset - start_offset, name, addend); |
fb3e5849 FB |
577 | break; |
578 | case R_390_16: | |
ce11fedc | 579 | fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n", |
ae228531 | 580 | rel->r_offset - start_offset, name, addend); |
fb3e5849 FB |
581 | break; |
582 | case R_390_8: | |
ce11fedc | 583 | fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n", |
ae228531 | 584 | rel->r_offset - start_offset, name, addend); |
fb3e5849 FB |
585 | break; |
586 | default: | |
587 | error("unsupported s390 relocation (%d)", type); | |
588 | } | |
589 | } | |
590 | } | |
591 | } | |
efdea7bf FB |
592 | #elif defined(HOST_ALPHA) |
593 | { | |
594 | for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { | |
ae228531 | 595 | if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) { |
efdea7bf | 596 | int type; |
74c95119 | 597 | |
efdea7bf | 598 | type = ELF64_R_TYPE(rel->r_info); |
74c95119 | 599 | sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
efdea7bf FB |
600 | switch (type) { |
601 | case R_ALPHA_GPDISP: | |
74c95119 FB |
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", | |
ae228531 | 605 | rel->r_offset - start_offset); |
74c95119 | 606 | fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n", |
ae228531 | 607 | rel->r_offset - start_offset + rel->r_addend); |
efdea7bf FB |
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: | |
74c95119 FB |
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", | |
ae228531 | 627 | rel->r_offset - start_offset, p); |
74c95119 FB |
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", | |
ae228531 | 632 | rel->r_offset - start_offset, p); |
74c95119 FB |
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", | |
ae228531 | 638 | rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset); |
efdea7bf FB |
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++) { | |
ae228531 | 652 | if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) { |
efdea7bf FB |
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 | } | |
d014c98c FB |
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++) { | |
ae228531 FB |
678 | if (rel->r_offset >= start_offset && |
679 | rel->r_offset < start_offset + copy_size) { | |
d014c98c FB |
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", | |
ae228531 | 697 | rel->r_offset - start_offset, name, addend); |
d014c98c FB |
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) " | |
ae228531 FB |
704 | " | (((%s + %d) >> 10) & 0x3fffff);\n", |
705 | rel->r_offset - start_offset, | |
706 | rel->r_offset - start_offset, | |
d014c98c FB |
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", | |
ae228531 FB |
715 | rel->r_offset - start_offset, |
716 | rel->r_offset - start_offset, | |
d014c98c FB |
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) " | |
ae228531 | 724 | " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) " |
d014c98c | 725 | " & 0x3fffffff);\n", |
ae228531 FB |
726 | rel->r_offset - start_offset, |
727 | rel->r_offset - start_offset, | |
728 | name, addend, | |
729 | rel->r_offset - start_offset); | |
d014c98c FB |
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++) { | |
ae228531 FB |
743 | if (rel->r_offset >= start_offset && |
744 | rel->r_offset < start_offset + copy_size) { | |
d014c98c FB |
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", | |
ae228531 | 756 | rel->r_offset - start_offset, name, addend); |
d014c98c FB |
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) " | |
ae228531 FB |
763 | " | (((%s + %d) >> 10) & 0x3fffff);\n", |
764 | rel->r_offset - start_offset, | |
765 | rel->r_offset - start_offset, | |
d014c98c FB |
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", | |
ae228531 FB |
774 | rel->r_offset - start_offset, |
775 | rel->r_offset - start_offset, | |
d014c98c FB |
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) " | |
ae228531 | 783 | " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) " |
d014c98c | 784 | " & 0x3fffffff);\n", |
ae228531 FB |
785 | rel->r_offset - start_offset, |
786 | rel->r_offset - start_offset, | |
787 | name, addend, | |
788 | rel->r_offset - start_offset); | |
d014c98c FB |
789 | break; |
790 | default: | |
791 | error("unsupported sparc64 relocation (%d)", type); | |
792 | } | |
793 | } | |
794 | } | |
795 | } | |
ce11fedc FB |
796 | #else |
797 | #error unsupported CPU | |
798 | #endif | |
dc99065b FB |
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); | |
367e86e8 FB |
811 | } |
812 | } | |
dc99065b FB |
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"); | |
367e86e8 | 820 | } |
367e86e8 FB |
821 | } |
822 | ||
823 | /* load an elf object file */ | |
dc99065b | 824 | int load_elf(const char *filename, FILE *outfile, int do_print_enum) |
367e86e8 FB |
825 | { |
826 | int fd; | |
ce11fedc FB |
827 | struct elfhdr ehdr; |
828 | struct elf_shdr *sec, *shdr, *symtab_sec, *strtab_sec, *text_sec; | |
367e86e8 | 829 | int i, j, nb_syms; |
ce11fedc | 830 | ElfW(Sym) *symtab, *sym; |
367e86e8 FB |
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 | |
367e86e8 FB |
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); | |
ce11fedc FB |
856 | if (ehdr.e_ident[EI_CLASS] != ELF_CLASS) |
857 | error("Unsupported ELF class"); | |
367e86e8 FB |
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"); | |
ce11fedc FB |
862 | if (!elf_check_arch(ehdr.e_machine)) |
863 | error("Unsupported CPU (e_machine=%d)", ehdr.e_machine); | |
367e86e8 FB |
864 | |
865 | /* read section headers */ | |
ce11fedc | 866 | shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
367e86e8 FB |
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) { | |
efdea7bf | 896 | ElfW(Rel) *rel = relocs; |
367e86e8 | 897 | for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) { |
efdea7bf FB |
898 | swabls(&rel->r_offset); |
899 | swabls(&rel->r_info); | |
367e86e8 FB |
900 | } |
901 | } else { | |
efdea7bf | 902 | ElfW(Rela) *rel = relocs; |
367e86e8 | 903 | for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) { |
efdea7bf FB |
904 | swabls(&rel->r_offset); |
905 | swabls(&rel->r_info); | |
906 | swabls(&rel->r_addend); | |
367e86e8 FB |
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 | ||
efdea7bf | 922 | nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym)); |
367e86e8 FB |
923 | if (do_swap) { |
924 | for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { | |
925 | swab32s(&sym->st_name); | |
ce11fedc FB |
926 | swabls(&sym->st_value); |
927 | swabls(&sym->st_size); | |
367e86e8 FB |
928 | swab16s(&sym->st_shndx); |
929 | } | |
930 | } | |
931 | ||
dc99065b | 932 | if (do_print_enum) { |
0ea00c9a | 933 | fprintf(outfile, "DEF(end, 0)\n"); |
dc99065b FB |
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)) { | |
0ea00c9a FB |
938 | gen_code(name, sym->st_value, sym->st_size, outfile, |
939 | text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 2); | |
dc99065b FB |
940 | } |
941 | } | |
942 | } else { | |
943 | /* generate big code generation switch */ | |
efdea7bf | 944 | #ifdef HOST_ALPHA |
74c95119 FB |
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"); | |
efdea7bf | 963 | #endif |
dc99065b FB |
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" | |
ae228531 FB |
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, | |
dc99065b FB |
989 | " for(;;) {\n" |
990 | " switch(*opc_ptr++) {\n" | |
991 | ); | |
367e86e8 | 992 | |
dc99065b FB |
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)) { | |
367e86e8 | 997 | #if 0 |
dc99065b FB |
998 | printf("%4d: %s pos=0x%08x len=%d\n", |
999 | i, name, sym->st_value, sym->st_size); | |
367e86e8 | 1000 | #endif |
dc99065b FB |
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 | ||
ae228531 | 1016 | /* generate epilogue */ |
ce11fedc | 1017 | switch(ELF_ARCH) { |
dc99065b FB |
1018 | case EM_386: |
1019 | fprintf(outfile, "*gen_code_ptr++ = 0xc3; /* ret */\n"); | |
1020 | break; | |
04369ff2 FB |
1021 | case EM_PPC: |
1022 | fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x4e800020; /* blr */\n"); | |
1023 | break; | |
fb3e5849 FB |
1024 | case EM_S390: |
1025 | fprintf(outfile, "*((uint16_t *)gen_code_ptr)++ = 0x07fe; /* br %%r14 */\n"); | |
1026 | break; | |
efdea7bf FB |
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; | |
d014c98c FB |
1033 | case EM_SPARC: |
1034 | case EM_SPARC32PLUS: | |
ae228531 FB |
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; | |
d014c98c | 1039 | case EM_SPARCV9: |
ae228531 FB |
1040 | fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c7e008; /* ret */\n"); |
1041 | fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81e80000; /* restore */\n"); | |
d014c98c | 1042 | break; |
efdea7bf FB |
1043 | default: |
1044 | error("unknown ELF architecture"); | |
dc99065b FB |
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 | } | |
367e86e8 FB |
1061 | } |
1062 | } | |
1063 | ||
1064 | close(fd); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | void usage(void) | |
1069 | { | |
1070 | printf("dyngen (c) 2003 Fabrice Bellard\n" | |
dc99065b FB |
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 | ); | |
367e86e8 FB |
1075 | exit(1); |
1076 | } | |
1077 | ||
1078 | int main(int argc, char **argv) | |
1079 | { | |
dc99065b | 1080 | int c, do_print_enum; |
367e86e8 FB |
1081 | const char *filename, *outfilename; |
1082 | FILE *outfile; | |
1083 | ||
1084 | outfilename = "out.c"; | |
dc99065b | 1085 | do_print_enum = 0; |
367e86e8 | 1086 | for(;;) { |
dc99065b | 1087 | c = getopt(argc, argv, "ho:c"); |
367e86e8 FB |
1088 | if (c == -1) |
1089 | break; | |
1090 | switch(c) { | |
1091 | case 'h': | |
1092 | usage(); | |
1093 | break; | |
1094 | case 'o': | |
1095 | outfilename = optarg; | |
1096 | break; | |
dc99065b FB |
1097 | case 'c': |
1098 | do_print_enum = 1; | |
1099 | break; | |
367e86e8 FB |
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); | |
dc99065b | 1108 | load_elf(filename, outfile, do_print_enum); |
367e86e8 FB |
1109 | fclose(outfile); |
1110 | return 0; | |
1111 | } |