?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
redhat 9 fix
[qemu/qemu_0_9_1_stable.git] / dyngen.c
blob58d22d9750077ebc6c2a10cafb93ef845b7329f8
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-host.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 #elif defined(HOST_ARM)
83
84 #define ELF_CLASS ELFCLASS32
85 #define ELF_ARCH EM_ARM
86 #define elf_check_arch(x) ((x) == EM_ARM)
87 #define ELF_USES_RELOC
88
89 #elif defined(HOST_M68K)
90
91 #define ELF_CLASS ELFCLASS32
92 #define ELF_ARCH EM_68K
93 #define elf_check_arch(x) ((x) == EM_68K)
94 #define ELF_USES_RELOCA
95
96 #else
97 #error unsupported CPU - please update the code
98 #endif
99
100 #include "elf.h"
101
102 #if ELF_CLASS == ELFCLASS32
103 typedef int32_t host_long;
104 typedef uint32_t host_ulong;
105 #define swabls(x) swab32s(x)
106 #else
107 typedef int64_t host_long;
108 typedef uint64_t host_ulong;
109 #define swabls(x) swab64s(x)
110 #endif
111
112 #ifdef ELF_USES_RELOCA
113 #define SHT_RELOC SHT_RELA
114 #else
115 #define SHT_RELOC SHT_REL
116 #endif
117
118 #include "bswap.h"
119
120 enum {
121 OUT_GEN_OP,
122 OUT_CODE,
123 OUT_INDEX_OP,
124 };
125
126 /* all dynamically generated functions begin with this code */
127 #define OP_PREFIX "op_"
128
129 int elf_must_swap(struct elfhdr *h)
130 {
131 union {
132 uint32_t i;
133 uint8_t b[4];
134 } swaptest;
135
136 swaptest.i = 1;
137 return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
138 (swaptest.b[0] == 0);
139 }
140
141 void swab16s(uint16_t *p)
142 {
143 *p = bswap16(*p);
144 }
145
146 void swab32s(uint32_t *p)
147 {
148 *p = bswap32(*p);
149 }
150
151 void swab64s(uint64_t *p)
152 {
153 *p = bswap64(*p);
154 }
155
156 void elf_swap_ehdr(struct elfhdr *h)
157 {
158 swab16s(&h->e_type); /* Object file type */
159 swab16s(&h-> e_machine); /* Architecture */
160 swab32s(&h-> e_version); /* Object file version */
161 swabls(&h-> e_entry); /* Entry point virtual address */
162 swabls(&h-> e_phoff); /* Program header table file offset */
163 swabls(&h-> e_shoff); /* Section header table file offset */
164 swab32s(&h-> e_flags); /* Processor-specific flags */
165 swab16s(&h-> e_ehsize); /* ELF header size in bytes */
166 swab16s(&h-> e_phentsize); /* Program header table entry size */
167 swab16s(&h-> e_phnum); /* Program header table entry count */
168 swab16s(&h-> e_shentsize); /* Section header table entry size */
169 swab16s(&h-> e_shnum); /* Section header table entry count */
170 swab16s(&h-> e_shstrndx); /* Section header string table index */
171 }
172
173 void elf_swap_shdr(struct elf_shdr *h)
174 {
175 swab32s(&h-> sh_name); /* Section name (string tbl index) */
176 swab32s(&h-> sh_type); /* Section type */
177 swabls(&h-> sh_flags); /* Section flags */
178 swabls(&h-> sh_addr); /* Section virtual addr at execution */
179 swabls(&h-> sh_offset); /* Section file offset */
180 swabls(&h-> sh_size); /* Section size in bytes */
181 swab32s(&h-> sh_link); /* Link to another section */
182 swab32s(&h-> sh_info); /* Additional section information */
183 swabls(&h-> sh_addralign); /* Section alignment */
184 swabls(&h-> sh_entsize); /* Entry size if section holds table */
185 }
186
187 void elf_swap_phdr(struct elf_phdr *h)
188 {
189 swab32s(&h->p_type); /* Segment type */
190 swabls(&h->p_offset); /* Segment file offset */
191 swabls(&h->p_vaddr); /* Segment virtual address */
192 swabls(&h->p_paddr); /* Segment physical address */
193 swabls(&h->p_filesz); /* Segment size in file */
194 swabls(&h->p_memsz); /* Segment size in memory */
195 swab32s(&h->p_flags); /* Segment flags */
196 swabls(&h->p_align); /* Segment alignment */
197 }
198
199 void elf_swap_rel(ELF_RELOC *rel)
200 {
201 swabls(&rel->r_offset);
202 swabls(&rel->r_info);
203 #ifdef ELF_USES_RELOCA
204 swabls(&rel->r_addend);
205 #endif
206 }
207
208 /* ELF file info */
209 int do_swap;
210 struct elf_shdr *shdr;
211 uint8_t **sdata;
212 struct elfhdr ehdr;
213 ElfW(Sym) *symtab;
214 int nb_syms;
215 char *strtab;
216 int text_shndx;
217
218 uint16_t get16(uint16_t *p)
219 {
220 uint16_t val;
221 val = *p;
222 if (do_swap)
223 val = bswap16(val);
224 return val;
225 }
226
227 uint32_t get32(uint32_t *p)
228 {
229 uint32_t val;
230 val = *p;
231 if (do_swap)
232 val = bswap32(val);
233 return val;
234 }
235
236 void put16(uint16_t *p, uint16_t val)
237 {
238 if (do_swap)
239 val = bswap16(val);
240 *p = val;
241 }
242
243 void put32(uint32_t *p, uint32_t val)
244 {
245 if (do_swap)
246 val = bswap32(val);
247 *p = val;
248 }
249
250 void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
251 {
252 va_list ap;
253 va_start(ap, fmt);
254 fprintf(stderr, "dyngen: ");
255 vfprintf(stderr, fmt, ap);
256 fprintf(stderr, "\n");
257 va_end(ap);
258 exit(1);
259 }
260
261
262 struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
263 const char *name)
264 {
265 int i;
266 const char *shname;
267 struct elf_shdr *sec;
268
269 for(i = 0; i < shnum; i++) {
270 sec = &shdr[i];
271 if (!sec->sh_name)
272 continue;
273 shname = shstr + sec->sh_name;
274 if (!strcmp(shname, name))
275 return sec;
276 }
277 return NULL;
278 }
279
280 int find_reloc(int sh_index)
281 {
282 struct elf_shdr *sec;
283 int i;
284
285 for(i = 0; i < ehdr.e_shnum; i++) {
286 sec = &shdr[i];
287 if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
288 return i;
289 }
290 return 0;
291 }
292
293 void *load_data(int fd, long offset, unsigned int size)
294 {
295 char *data;
296
297 data = malloc(size);
298 if (!data)
299 return NULL;
300 lseek(fd, offset, SEEK_SET);
301 if (read(fd, data, size) != size) {
302 free(data);
303 return NULL;
304 }
305 return data;
306 }
307
308 int strstart(const char *str, const char *val, const char **ptr)
309 {
310 const char *p, *q;
311 p = str;
312 q = val;
313 while (*q != '\0') {
314 if (*p != *q)
315 return 0;
316 p++;
317 q++;
318 }
319 if (ptr)
320 *ptr = p;
321 return 1;
322 }
323
324 #ifdef HOST_ARM
325
326 int arm_emit_ldr_info(const char *name, unsigned long start_offset,
327 FILE *outfile, uint8_t *p_start, uint8_t *p_end,
328 ELF_RELOC *relocs, int nb_relocs)
329 {
330 uint8_t *p;
331 uint32_t insn;
332 int offset, min_offset, pc_offset, data_size;
333 uint8_t data_allocated[1024];
334 unsigned int data_index;
335
336 memset(data_allocated, 0, sizeof(data_allocated));
337
338 p = p_start;
339 min_offset = p_end - p_start;
340 while (p < p_start + min_offset) {
341 insn = get32((uint32_t *)p);
342 if ((insn & 0x0d5f0000) == 0x051f0000) {
343 /* ldr reg, [pc, #im] */
344 offset = insn & 0xfff;
345 if (!(insn & 0x00800000))
346 offset = -offset;
347 if ((offset & 3) !=0)
348 error("%s:%04x: ldr pc offset must be 32 bit aligned",
349 name, start_offset + p - p_start);
350 pc_offset = p - p_start + offset + 8;
351 if (pc_offset <= (p - p_start) ||
352 pc_offset >= (p_end - p_start))
353 error("%s:%04x: ldr pc offset must point inside the function code",
354 name, start_offset + p - p_start);
355 if (pc_offset < min_offset)
356 min_offset = pc_offset;
357 if (outfile) {
358 /* ldr position */
359 fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
360 p - p_start);
361 /* ldr data index */
362 data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
363 fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
364 data_index);
365 fprintf(outfile, " arm_ldr_ptr++;\n");
366 if (data_index >= sizeof(data_allocated))
367 error("%s: too many data", name);
368 if (!data_allocated[data_index]) {
369 ELF_RELOC *rel;
370 int i, addend, type;
371 const char *sym_name, *p;
372 char relname[1024];
373
374 data_allocated[data_index] = 1;
375
376 /* data value */
377 addend = get32((uint32_t *)(p_start + pc_offset));
378 relname[0] = '\0';
379 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
380 if (rel->r_offset == (pc_offset + start_offset)) {
381 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
382 /* the compiler leave some unnecessary references to the code */
383 if (strstart(sym_name, "__op_param", &p)) {
384 snprintf(relname, sizeof(relname), "param%s", p);
385 } else {
386 snprintf(relname, sizeof(relname), "(long)(&%s)", sym_name);
387 }
388 type = ELF32_R_TYPE(rel->r_info);
389 if (type != R_ARM_ABS32)
390 error("%s: unsupported data relocation", name);
391 break;
392 }
393 }
394 fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
395 data_index, addend);
396 if (relname[0] != '\0')
397 fprintf(outfile, " + %s", relname);
398 fprintf(outfile, ";\n");
399 }
400 }
401 }
402 p += 4;
403 }
404 data_size = (p_end - p_start) - min_offset;
405 if (data_size > 0 && outfile) {
406 fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2);
407 }
408
409 /* the last instruction must be a mov pc, lr */
410 if (p == p_start)
411 goto arm_ret_error;
412 p -= 4;
413 insn = get32((uint32_t *)p);
414 if ((insn & 0xffff0000) != 0xe91b0000) {
415 arm_ret_error:
416 if (!outfile)
417 printf("%s: invalid epilog\n", name);
418 }
419 return p - p_start;
420 }
421 #endif
422
423
424 #define MAX_ARGS 3
425
426 /* generate op code */
427 void gen_code(const char *name, host_ulong offset, host_ulong size,
428 FILE *outfile, uint8_t *text, ELF_RELOC *relocs, int nb_relocs,
429 int gen_switch)
430 {
431 int copy_size = 0;
432 uint8_t *p_start, *p_end;
433 host_ulong start_offset;
434 int nb_args, i, n;
435 uint8_t args_present[MAX_ARGS];
436 const char *sym_name, *p;
437 ELF_RELOC *rel;
438
439 /* Compute exact size excluding prologue and epilogue instructions.
440 * Increment start_offset to skip epilogue instructions, then compute
441 * copy_size the indicate the size of the remaining instructions (in
442 * bytes).
443 */
444 p_start = text + offset;
445 p_end = p_start + size;
446 start_offset = offset;
447 switch(ELF_ARCH) {
448 case EM_386:
449 {
450 int len;
451 len = p_end - p_start;
452 if (len == 0)
453 error("empty code for %s", name);
454 if (p_end[-1] == 0xc3) {
455 len--;
456 } else {
457 error("ret or jmp expected at the end of %s", name);
458 }
459 copy_size = len;
460 }
461 break;
462 case EM_PPC:
463 {
464 uint8_t *p;
465 p = (void *)(p_end - 4);
466 if (p == p_start)
467 error("empty code for %s", name);
468 if (get32((uint32_t *)p) != 0x4e800020)
469 error("blr expected at the end of %s", name);
470 copy_size = p - p_start;
471 }
472 break;
473 case EM_S390:
474 {
475 uint8_t *p;
476 p = (void *)(p_end - 2);
477 if (p == p_start)
478 error("empty code for %s", name);
479 if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
480 error("br %%r14 expected at the end of %s", name);
481 copy_size = p - p_start;
482 }
483 break;
484 case EM_ALPHA:
485 {
486 uint8_t *p;
487 p = p_end - 4;
488 if (p == p_start)
489 error("empty code for %s", name);
490 if (get32((uint32_t *)p) != 0x6bfa8001)
491 error("ret expected at the end of %s", name);
492 copy_size = p - p_start;
493 }
494 break;
495 case EM_IA_64:
496 {
497 uint8_t *p;
498 p = (void *)(p_end - 4);
499 if (p == p_start)
500 error("empty code for %s", name);
501 /* br.ret.sptk.many b0;; */
502 /* 08 00 84 00 */
503 if (get32((uint32_t *)p) != 0x00840008)
504 error("br.ret.sptk.many b0;; expected at the end of %s", name);
505 copy_size = p - p_start;
506 }
507 break;
508 case EM_SPARC:
509 case EM_SPARC32PLUS:
510 {
511 uint32_t start_insn, end_insn1, end_insn2;
512 uint8_t *p;
513 p = (void *)(p_end - 8);
514 if (p <= p_start)
515 error("empty code for %s", name);
516 start_insn = get32((uint32_t *)(p_start + 0x0));
517 end_insn1 = get32((uint32_t *)(p + 0x0));
518 end_insn2 = get32((uint32_t *)(p + 0x4));
519 if ((start_insn & ~0x1fff) == 0x9de3a000) {
520 p_start += 0x4;
521 start_offset += 0x4;
522 if ((int)(start_insn | ~0x1fff) < -128)
523 error("Found bogus save at the start of %s", name);
524 if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
525 error("ret; restore; not found at end of %s", name);
526 } else {
527 error("No save at the beginning of %s", name);
528 }
529 #if 0
530 /* Skip a preceeding nop, if present. */
531 if (p > p_start) {
532 skip_insn = get32((uint32_t *)(p - 0x4));
533 if (skip_insn == 0x01000000)
534 p -= 4;
535 }
536 #endif
537 copy_size = p - p_start;
538 }
539 break;
540 case EM_SPARCV9:
541 {
542 uint32_t start_insn, end_insn1, end_insn2, skip_insn;
543 uint8_t *p;
544 p = (void *)(p_end - 8);
545 if (p <= p_start)
546 error("empty code for %s", name);
547 start_insn = get32((uint32_t *)(p_start + 0x0));
548 end_insn1 = get32((uint32_t *)(p + 0x0));
549 end_insn2 = get32((uint32_t *)(p + 0x4));
550 if ((start_insn & ~0x1fff) == 0x9de3a000) {
551 p_start += 0x4;
552 start_offset += 0x4;
553 if ((int)(start_insn | ~0x1fff) < -256)
554 error("Found bogus save at the start of %s", name);
555 if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
556 error("ret; restore; not found at end of %s", name);
557 } else {
558 error("No save at the beginning of %s", name);
559 }
560
561 /* Skip a preceeding nop, if present. */
562 if (p > p_start) {
563 skip_insn = get32((uint32_t *)(p - 0x4));
564 if (skip_insn == 0x01000000)
565 p -= 4;
566 }
567
568 copy_size = p - p_start;
569 }
570 break;
571 #ifdef HOST_ARM
572 case EM_ARM:
573 if ((p_end - p_start) <= 16)
574 error("%s: function too small", name);
575 if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
576 (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
577 get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
578 error("%s: invalid prolog", name);
579 p_start += 12;
580 start_offset += 12;
581 copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
582 relocs, nb_relocs);
583 break;
584 #endif
585 case EM_68K:
586 {
587 uint8_t *p;
588 p = (void *)(p_end - 2);
589 if (p == p_start)
590 error("empty code for %s", name);
591 // remove NOP's, probably added for alignment
592 while ((get16((uint16_t *)p) == 0x4e71) &&
593 (p>p_start))
594 p -= 2;
595 if (get16((uint16_t *)p) != 0x4e75)
596 error("rts expected at the end of %s", name);
597 copy_size = p - p_start;
598 }
599 break;
600 default:
601 error("unknown ELF architecture");
602 }
603
604 /* compute the number of arguments by looking at the relocations */
605 for(i = 0;i < MAX_ARGS; i++)
606 args_present[i] = 0;
607
608 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
609 if (rel->r_offset >= start_offset &&
610 rel->r_offset < start_offset + (p_end - p_start)) {
611 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
612 if (strstart(sym_name, "__op_param", &p)) {
613 n = strtoul(p, NULL, 10);
614 if (n > MAX_ARGS)
615 error("too many arguments in %s", name);
616 args_present[n - 1] = 1;
617 }
618 }
619 }
620
621 nb_args = 0;
622 while (nb_args < MAX_ARGS && args_present[nb_args])
623 nb_args++;
624 for(i = nb_args; i < MAX_ARGS; i++) {
625 if (args_present[i])
626 error("inconsistent argument numbering in %s", name);
627 }
628
629 if (gen_switch == 2) {
630 fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
631 } else if (gen_switch == 1) {
632
633 /* output C code */
634 fprintf(outfile, "case INDEX_%s: {\n", name);
635 if (nb_args > 0) {
636 fprintf(outfile, " long ");
637 for(i = 0; i < nb_args; i++) {
638 if (i != 0)
639 fprintf(outfile, ", ");
640 fprintf(outfile, "param%d", i + 1);
641 }
642 fprintf(outfile, ";\n");
643 }
644 fprintf(outfile, " extern void %s();\n", name);
645
646 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
647 if (rel->r_offset >= start_offset &&
648 rel->r_offset < start_offset + (p_end - p_start)) {
649 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
650 if (*sym_name &&
651 !strstart(sym_name, "__op_param", NULL) &&
652 !strstart(sym_name, "__op_jmp", NULL)) {
653 #if defined(HOST_SPARC)
654 if (sym_name[0] == '.') {
655 fprintf(outfile,
656 "extern char __dot_%s __asm__(\"%s\");\n",
657 sym_name+1, sym_name);
658 continue;
659 }
660 #endif
661 fprintf(outfile, "extern char %s;\n", sym_name);
662 }
663 }
664 }
665
666 fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
667
668 /* emit code offset information */
669 {
670 ElfW(Sym) *sym;
671 const char *sym_name, *p;
672 unsigned long val;
673 int n;
674
675 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
676 sym_name = strtab + sym->st_name;
677 if (strstart(sym_name, "__op_label", &p)) {
678 uint8_t *ptr;
679 unsigned long offset;
680
681 /* test if the variable refers to a label inside
682 the code we are generating */
683 ptr = sdata[sym->st_shndx];
684 if (!ptr)
685 error("__op_labelN in invalid section");
686 offset = sym->st_value;
687 val = *(unsigned long *)(ptr + offset);
688 #ifdef ELF_USES_RELOCA
689 {
690 int reloc_shndx, nb_relocs1, j;
691
692 /* try to find a matching relocation */
693 reloc_shndx = find_reloc(sym->st_shndx);
694 if (reloc_shndx) {
695 nb_relocs1 = shdr[reloc_shndx].sh_size /
696 shdr[reloc_shndx].sh_entsize;
697 rel = (ELF_RELOC *)sdata[reloc_shndx];
698 for(j = 0; j < nb_relocs1; j++) {
699 if (rel->r_offset == offset) {
700 val = rel->r_addend;
701 break;
702 }
703 rel++;
704 }
705 }
706 }
707 #endif
708
709 if (val >= start_offset && val < start_offset + copy_size) {
710 n = strtol(p, NULL, 10);
711 fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
712 }
713 }
714 }
715 }
716
717 /* load parameres in variables */
718 for(i = 0; i < nb_args; i++) {
719 fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
720 }
721
722 /* patch relocations */
723 #if defined(HOST_I386)
724 {
725 char name[256];
726 int type;
727 int addend;
728 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
729 if (rel->r_offset >= start_offset &&
730 rel->r_offset < start_offset + copy_size) {
731 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
732 if (strstart(sym_name, "__op_param", &p)) {
733 snprintf(name, sizeof(name), "param%s", p);
734 } else {
735 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
736 }
737 type = ELF32_R_TYPE(rel->r_info);
738 addend = get32((uint32_t *)(text + rel->r_offset));
739 switch(type) {
740 case R_386_32:
741 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
742 rel->r_offset - start_offset, name, addend);
743 break;
744 case R_386_PC32:
745 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
746 rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
747 break;
748 default:
749 error("unsupported i386 relocation (%d)", type);
750 }
751 }
752 }
753 }
754 #elif defined(HOST_PPC)
755 {
756 char name[256];
757 int type;
758 int addend;
759 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
760 if (rel->r_offset >= start_offset &&
761 rel->r_offset < start_offset + copy_size) {
762 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
763 if (strstart(sym_name, "__op_jmp", &p)) {
764 int n;
765 n = strtol(p, NULL, 10);
766 /* __op_jmp relocations are done at
767 runtime to do translated block
768 chaining: the offset of the instruction
769 needs to be stored */
770 fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
771 n, rel->r_offset - start_offset);
772 continue;
773 }
774
775 if (strstart(sym_name, "__op_param", &p)) {
776 snprintf(name, sizeof(name), "param%s", p);
777 } else {
778 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
779 }
780 type = ELF32_R_TYPE(rel->r_info);
781 addend = rel->r_addend;
782 switch(type) {
783 case R_PPC_ADDR32:
784 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
785 rel->r_offset - start_offset, name, addend);
786 break;
787 case R_PPC_ADDR16_LO:
788 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
789 rel->r_offset - start_offset, name, addend);
790 break;
791 case R_PPC_ADDR16_HI:
792 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
793 rel->r_offset - start_offset, name, addend);
794 break;
795 case R_PPC_ADDR16_HA:
796 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
797 rel->r_offset - start_offset, name, addend);
798 break;
799 case R_PPC_REL24:
800 /* warning: must be at 32 MB distancy */
801 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
802 rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
803 break;
804 default:
805 error("unsupported powerpc relocation (%d)", type);
806 }
807 }
808 }
809 }
810 #elif defined(HOST_S390)
811 {
812 char name[256];
813 int type;
814 int addend;
815 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
816 if (rel->r_offset >= start_offset &&
817 rel->r_offset < start_offset + copy_size) {
818 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
819 if (strstart(sym_name, "__op_param", &p)) {
820 snprintf(name, sizeof(name), "param%s", p);
821 } else {
822 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
823 }
824 type = ELF32_R_TYPE(rel->r_info);
825 addend = rel->r_addend;
826 switch(type) {
827 case R_390_32:
828 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
829 rel->r_offset - start_offset, name, addend);
830 break;
831 case R_390_16:
832 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
833 rel->r_offset - start_offset, name, addend);
834 break;
835 case R_390_8:
836 fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
837 rel->r_offset - start_offset, name, addend);
838 break;
839 default:
840 error("unsupported s390 relocation (%d)", type);
841 }
842 }
843 }
844 }
845 #elif defined(HOST_ALPHA)
846 {
847 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
848 if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
849 int type;
850
851 type = ELF64_R_TYPE(rel->r_info);
852 sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
853 switch (type) {
854 case R_ALPHA_GPDISP:
855 /* The gp is just 32 bit, and never changes, so it's easiest to emit it
856 as an immediate instead of constructing it from the pv or ra. */
857 fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
858 rel->r_offset - start_offset);
859 fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
860 rel->r_offset - start_offset + rel->r_addend);
861 break;
862 case R_ALPHA_LITUSE:
863 /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
864 now, since some called functions (libc) need pv to be set up. */
865 break;
866 case R_ALPHA_HINT:
867 /* Branch target prediction hint. Ignore for now. Should be already
868 correct for in-function jumps. */
869 break;
870 case R_ALPHA_LITERAL:
871 /* Load a literal from the GOT relative to the gp. Since there's only a
872 single gp, nothing is to be done. */
873 break;
874 case R_ALPHA_GPRELHIGH:
875 /* Handle fake relocations against __op_param symbol. Need to emit the
876 high part of the immediate value instead. Other symbols need no
877 special treatment. */
878 if (strstart(sym_name, "__op_param", &p))
879 fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
880 rel->r_offset - start_offset, p);
881 break;
882 case R_ALPHA_GPRELLOW:
883 if (strstart(sym_name, "__op_param", &p))
884 fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
885 rel->r_offset - start_offset, p);
886 break;
887 case R_ALPHA_BRSGP:
888 /* PC-relative jump. Tweak offset to skip the two instructions that try to
889 set up the gp from the pv. */
890 fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
891 rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
892 break;
893 default:
894 error("unsupported Alpha relocation (%d)", type);
895 }
896 }
897 }
898 }
899 #elif defined(HOST_IA64)
900 {
901 char name[256];
902 int type;
903 int addend;
904 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
905 if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
906 sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
907 if (strstart(sym_name, "__op_param", &p)) {
908 snprintf(name, sizeof(name), "param%s", p);
909 } else {
910 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
911 }
912 type = ELF64_R_TYPE(rel->r_info);
913 addend = rel->r_addend;
914 switch(type) {
915 case R_IA64_LTOFF22:
916 error("must implemnt R_IA64_LTOFF22 relocation");
917 case R_IA64_PCREL21B:
918 error("must implemnt R_IA64_PCREL21B relocation");
919 default:
920 error("unsupported ia64 relocation (%d)", type);
921 }
922 }
923 }
924 }
925 #elif defined(HOST_SPARC)
926 {
927 char name[256];
928 int type;
929 int addend;
930 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
931 if (rel->r_offset >= start_offset &&
932 rel->r_offset < start_offset + copy_size) {
933 sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
934 if (strstart(sym_name, "__op_param", &p)) {
935 snprintf(name, sizeof(name), "param%s", p);
936 } else {
937 if (sym_name[0] == '.')
938 snprintf(name, sizeof(name),
939 "(long)(&__dot_%s)",
940 sym_name + 1);
941 else
942 snprintf(name, sizeof(name),
943 "(long)(&%s)", sym_name);
944 }
945 type = ELF32_R_TYPE(rel->r_info);
946 addend = rel->r_addend;
947 switch(type) {
948 case R_SPARC_32:
949 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
950 rel->r_offset - start_offset, name, addend);
951 break;
952 case R_SPARC_HI22:
953 fprintf(outfile,
954 " *(uint32_t *)(gen_code_ptr + %d) = "
955 "((*(uint32_t *)(gen_code_ptr + %d)) "
956 " & ~0x3fffff) "
957 " | (((%s + %d) >> 10) & 0x3fffff);\n",
958 rel->r_offset - start_offset,
959 rel->r_offset - start_offset,
960 name, addend);
961 break;
962 case R_SPARC_LO10:
963 fprintf(outfile,
964 " *(uint32_t *)(gen_code_ptr + %d) = "
965 "((*(uint32_t *)(gen_code_ptr + %d)) "
966 " & ~0x3ff) "
967 " | ((%s + %d) & 0x3ff);\n",
968 rel->r_offset - start_offset,
969 rel->r_offset - start_offset,
970 name, addend);
971 break;
972 case R_SPARC_WDISP30:
973 fprintf(outfile,
974 " *(uint32_t *)(gen_code_ptr + %d) = "
975 "((*(uint32_t *)(gen_code_ptr + %d)) "
976 " & ~0x3fffffff) "
977 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
978 " & 0x3fffffff);\n",
979 rel->r_offset - start_offset,
980 rel->r_offset - start_offset,
981 name, addend,
982 rel->r_offset - start_offset);
983 break;
984 default:
985 error("unsupported sparc relocation (%d)", type);
986 }
987 }
988 }
989 }
990 #elif defined(HOST_SPARC64)
991 {
992 char name[256];
993 int type;
994 int addend;
995 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
996 if (rel->r_offset >= start_offset &&
997 rel->r_offset < start_offset + copy_size) {
998 sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
999 if (strstart(sym_name, "__op_param", &p)) {
1000 snprintf(name, sizeof(name), "param%s", p);
1001 } else {
1002 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
1003 }
1004 type = ELF64_R_TYPE(rel->r_info);
1005 addend = rel->r_addend;
1006 switch(type) {
1007 case R_SPARC_32:
1008 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1009 rel->r_offset - start_offset, name, addend);
1010 break;
1011 case R_SPARC_HI22:
1012 fprintf(outfile,
1013 " *(uint32_t *)(gen_code_ptr + %d) = "
1014 "((*(uint32_t *)(gen_code_ptr + %d)) "
1015 " & ~0x3fffff) "
1016 " | (((%s + %d) >> 10) & 0x3fffff);\n",
1017 rel->r_offset - start_offset,
1018 rel->r_offset - start_offset,
1019 name, addend);
1020 break;
1021 case R_SPARC_LO10:
1022 fprintf(outfile,
1023 " *(uint32_t *)(gen_code_ptr + %d) = "
1024 "((*(uint32_t *)(gen_code_ptr + %d)) "
1025 " & ~0x3ff) "
1026 " | ((%s + %d) & 0x3ff);\n",
1027 rel->r_offset - start_offset,
1028 rel->r_offset - start_offset,
1029 name, addend);
1030 break;
1031 case R_SPARC_WDISP30:
1032 fprintf(outfile,
1033 " *(uint32_t *)(gen_code_ptr + %d) = "
1034 "((*(uint32_t *)(gen_code_ptr + %d)) "
1035 " & ~0x3fffffff) "
1036 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
1037 " & 0x3fffffff);\n",
1038 rel->r_offset - start_offset,
1039 rel->r_offset - start_offset,
1040 name, addend,
1041 rel->r_offset - start_offset);
1042 break;
1043 default:
1044 error("unsupported sparc64 relocation (%d)", type);
1045 }
1046 }
1047 }
1048 }
1049 #elif defined(HOST_ARM)
1050 {
1051 char name[256];
1052 int type;
1053 int addend;
1054
1055 arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
1056 relocs, nb_relocs);
1057
1058 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1059 if (rel->r_offset >= start_offset &&
1060 rel->r_offset < start_offset + copy_size) {
1061 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1062 /* the compiler leave some unnecessary references to the code */
1063 if (sym_name[0] == '\0')
1064 continue;
1065 if (strstart(sym_name, "__op_param", &p)) {
1066 snprintf(name, sizeof(name), "param%s", p);
1067 } else {
1068 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
1069 }
1070 type = ELF32_R_TYPE(rel->r_info);
1071 addend = get32((uint32_t *)(text + rel->r_offset));
1072 switch(type) {
1073 case R_ARM_ABS32:
1074 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1075 rel->r_offset - start_offset, name, addend);
1076 break;
1077 case R_ARM_PC24:
1078 fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
1079 rel->r_offset - start_offset, addend, name);
1080 break;
1081 default:
1082 error("unsupported arm relocation (%d)", type);
1083 }
1084 }
1085 }
1086 }
1087 #elif defined(HOST_M68K)
1088 {
1089 char name[256];
1090 int type;
1091 int addend;
1092 Elf32_Sym *sym;
1093 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1094 if (rel->r_offset >= start_offset &&
1095 rel->r_offset < start_offset + copy_size) {
1096 sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
1097 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1098 if (strstart(sym_name, "__op_param", &p)) {
1099 snprintf(name, sizeof(name), "param%s", p);
1100 } else {
1101 snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
1102 }
1103 type = ELF32_R_TYPE(rel->r_info);
1104 addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
1105 switch(type) {
1106 case R_68K_32:
1107 fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
1108 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
1109 rel->r_offset - start_offset, name, addend );
1110 break;
1111 case R_68K_PC32:
1112 fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
1113 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
1114 rel->r_offset - start_offset, name, rel->r_offset - start_offset, /*sym->st_value+*/ addend);
1115 break;
1116 default:
1117 error("unsupported m68k relocation (%d)", type);
1118 }
1119 }
1120 }
1121 }
1122 #else
1123 #error unsupported CPU
1124 #endif
1125 fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
1126 fprintf(outfile, "}\n");
1127 fprintf(outfile, "break;\n\n");
1128 } else {
1129 fprintf(outfile, "static inline void gen_%s(", name);
1130 if (nb_args == 0) {
1131 fprintf(outfile, "void");
1132 } else {
1133 for(i = 0; i < nb_args; i++) {
1134 if (i != 0)
1135 fprintf(outfile, ", ");
1136 fprintf(outfile, "long param%d", i + 1);
1137 }
1138 }
1139 fprintf(outfile, ")\n");
1140 fprintf(outfile, "{\n");
1141 for(i = 0; i < nb_args; i++) {
1142 fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1);
1143 }
1144 fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
1145 fprintf(outfile, "}\n\n");
1146 }
1147 }
1148
1149 /* load an elf object file */
1150 int load_elf(const char *filename, FILE *outfile, int out_type)
1151 {
1152 int fd;
1153 struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
1154 int i, j;
1155 ElfW(Sym) *sym;
1156 char *shstr;
1157 uint8_t *text;
1158 ELF_RELOC *relocs;
1159 int nb_relocs;
1160 ELF_RELOC *rel;
1161
1162 fd = open(filename, O_RDONLY);
1163 if (fd < 0)
1164 error("can't open file '%s'", filename);
1165
1166 /* Read ELF header. */
1167 if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
1168 error("unable to read file header");
1169
1170 /* Check ELF identification. */
1171 if (ehdr.e_ident[EI_MAG0] != ELFMAG0
1172 || ehdr.e_ident[EI_MAG1] != ELFMAG1
1173 || ehdr.e_ident[EI_MAG2] != ELFMAG2
1174 || ehdr.e_ident[EI_MAG3] != ELFMAG3
1175 || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
1176 error("bad ELF header");
1177 }
1178
1179 do_swap = elf_must_swap(&ehdr);
1180 if (do_swap)
1181 elf_swap_ehdr(&ehdr);
1182 if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
1183 error("Unsupported ELF class");
1184 if (ehdr.e_type != ET_REL)
1185 error("ELF object file expected");
1186 if (ehdr.e_version != EV_CURRENT)
1187 error("Invalid ELF version");
1188 if (!elf_check_arch(ehdr.e_machine))
1189 error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
1190
1191 /* read section headers */
1192 shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
1193 if (do_swap) {
1194 for(i = 0; i < ehdr.e_shnum; i++) {
1195 elf_swap_shdr(&shdr[i]);
1196 }
1197 }
1198
1199 /* read all section data */
1200 sdata = malloc(sizeof(void *) * ehdr.e_shnum);
1201 memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
1202
1203 for(i = 0;i < ehdr.e_shnum; i++) {
1204 sec = &shdr[i];
1205 if (sec->sh_type != SHT_NOBITS)
1206 sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
1207 }
1208
1209 sec = &shdr[ehdr.e_shstrndx];
1210 shstr = sdata[ehdr.e_shstrndx];
1211
1212 /* swap relocations */
1213 for(i = 0; i < ehdr.e_shnum; i++) {
1214 sec = &shdr[i];
1215 if (sec->sh_type == SHT_RELOC) {
1216 nb_relocs = sec->sh_size / sec->sh_entsize;
1217 if (do_swap) {
1218 for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
1219 elf_swap_rel(rel);
1220 }
1221 }
1222 }
1223 /* text section */
1224
1225 text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
1226 if (!text_sec)
1227 error("could not find .text section");
1228 text_shndx = text_sec - shdr;
1229 text = sdata[text_shndx];
1230
1231 /* find text relocations, if any */
1232 relocs = NULL;
1233 nb_relocs = 0;
1234 i = find_reloc(text_shndx);
1235 if (i != 0) {
1236 relocs = (ELF_RELOC *)sdata[i];
1237 nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
1238 }
1239
1240 symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
1241 if (!symtab_sec)
1242 error("could not find .symtab section");
1243 strtab_sec = &shdr[symtab_sec->sh_link];
1244
1245 symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
1246 strtab = sdata[symtab_sec->sh_link];
1247
1248 nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
1249 if (do_swap) {
1250 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1251 swab32s(&sym->st_name);
1252 swabls(&sym->st_value);
1253 swabls(&sym->st_size);
1254 swab16s(&sym->st_shndx);
1255 }
1256 }
1257
1258 if (out_type == OUT_INDEX_OP) {
1259 fprintf(outfile, "DEF(end, 0, 0)\n");
1260 fprintf(outfile, "DEF(nop, 0, 0)\n");
1261 fprintf(outfile, "DEF(nop1, 1, 0)\n");
1262 fprintf(outfile, "DEF(nop2, 2, 0)\n");
1263 fprintf(outfile, "DEF(nop3, 3, 0)\n");
1264 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1265 const char *name, *p;
1266 name = strtab + sym->st_name;
1267 if (strstart(name, OP_PREFIX, &p)) {
1268 gen_code(name, sym->st_value, sym->st_size, outfile,
1269 text, relocs, nb_relocs, 2);
1270 }
1271 }
1272 } else if (out_type == OUT_GEN_OP) {
1273 /* generate gen_xxx functions */
1274
1275 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1276 const char *name;
1277 name = strtab + sym->st_name;
1278 if (strstart(name, OP_PREFIX, NULL)) {
1279 if (sym->st_shndx != (text_sec - shdr))
1280 error("invalid section for opcode (0x%x)", sym->st_shndx);
1281 gen_code(name, sym->st_value, sym->st_size, outfile,
1282 text, relocs, nb_relocs, 0);
1283 }
1284 }
1285
1286 } else {
1287 /* generate big code generation switch */
1288 fprintf(outfile,
1289 "int dyngen_code(uint8_t *gen_code_buf,\n"
1290 " uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
1291 " const uint16_t *opc_buf, const uint32_t *opparam_buf)\n"
1292 "{\n"
1293 " uint8_t *gen_code_ptr;\n"
1294 " const uint16_t *opc_ptr;\n"
1295 " const uint32_t *opparam_ptr;\n");
1296
1297 #ifdef HOST_ARM
1298 fprintf(outfile,
1299 " uint8_t *last_gen_code_ptr = gen_code_buf;\n"
1300 " LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
1301 " uint32_t *arm_data_ptr = arm_data_table;\n");
1302 #endif
1303
1304 fprintf(outfile,
1305 "\n"
1306 " gen_code_ptr = gen_code_buf;\n"
1307 " opc_ptr = opc_buf;\n"
1308 " opparam_ptr = opparam_buf;\n");
1309
1310 /* Generate prologue, if needed. */
1311
1312 fprintf(outfile,
1313 " for(;;) {\n"
1314 " switch(*opc_ptr++) {\n"
1315 );
1316
1317 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1318 const char *name;
1319 name = strtab + sym->st_name;
1320 if (strstart(name, OP_PREFIX, NULL)) {
1321 #if 0
1322 printf("%4d: %s pos=0x%08x len=%d\n",
1323 i, name, sym->st_value, sym->st_size);
1324 #endif
1325 if (sym->st_shndx != (text_sec - shdr))
1326 error("invalid section for opcode (0x%x)", sym->st_shndx);
1327 gen_code(name, sym->st_value, sym->st_size, outfile,
1328 text, relocs, nb_relocs, 1);
1329 }
1330 }
1331
1332 fprintf(outfile,
1333 " case INDEX_op_nop:\n"
1334 " break;\n"
1335 " case INDEX_op_nop1:\n"
1336 " opparam_ptr++;\n"
1337 " break;\n"
1338 " case INDEX_op_nop2:\n"
1339 " opparam_ptr += 2;\n"
1340 " break;\n"
1341 " case INDEX_op_nop3:\n"
1342 " opparam_ptr += 3;\n"
1343 " break;\n"
1344 " default:\n"
1345 " goto the_end;\n"
1346 " }\n");
1347
1348 #ifdef HOST_ARM
1349 /* generate constant table if needed */
1350 fprintf(outfile,
1351 " if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
1352 " gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
1353 " last_gen_code_ptr = gen_code_ptr;\n"
1354 " arm_ldr_ptr = arm_ldr_table;\n"
1355 " arm_data_ptr = arm_data_table;\n"
1356 " }\n");
1357 #endif
1358
1359
1360 fprintf(outfile,
1361 " }\n"
1362 " the_end:\n"
1363 );
1364
1365 /* generate some code patching */
1366 #ifdef HOST_ARM
1367 fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
1368 #endif
1369 /* flush instruction cache */
1370 fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
1371
1372 fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
1373 fprintf(outfile, "}\n\n");
1374
1375 }
1376
1377 close(fd);
1378 return 0;
1379 }
1380
1381 void usage(void)
1382 {
1383 printf("dyngen (c) 2003 Fabrice Bellard\n"
1384 "usage: dyngen [-o outfile] [-c] objfile\n"
1385 "Generate a dynamic code generator from an object file\n"
1386 "-c output enum of operations\n"
1387 "-g output gen_op_xx() functions\n"
1388 );
1389 exit(1);
1390 }
1391
1392 int main(int argc, char **argv)
1393 {
1394 int c, out_type;
1395 const char *filename, *outfilename;
1396 FILE *outfile;
1397
1398 outfilename = "out.c";
1399 out_type = OUT_CODE;
1400 for(;;) {
1401 c = getopt(argc, argv, "ho:cg");
1402 if (c == -1)
1403 break;
1404 switch(c) {
1405 case 'h':
1406 usage();
1407 break;
1408 case 'o':
1409 outfilename = optarg;
1410 break;
1411 case 'c':
1412 out_type = OUT_INDEX_OP;
1413 break;
1414 case 'g':
1415 out_type = OUT_GEN_OP;
1416 break;
1417 }
1418 }
1419 if (optind >= argc)
1420 usage();
1421 filename = argv[optind];
1422 outfile = fopen(outfilename, "w");
1423 if (!outfile)
1424 error("could not open '%s'", outfilename);
1425 load_elf(filename, outfile, out_type);
1426 fclose(outfile);
1427 return 0;
1428 }
Stable branch of Qemu 0.9.1