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ia64 host support (David Mosberger)
[qemu.git] / dyngen.c
1 /*
2 * Generic Dynamic compiler generator
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * The COFF object format support was extracted from Kazu's QEMU port
7 * to Win32.
8 *
9 * Mach-O Support by Matt Reda and Pierre d'Herbemont
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <stdarg.h>
29 #include <inttypes.h>
30 #include <unistd.h>
31 #include <fcntl.h>
32
33 #include "config-host.h"
34
35 /* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
36 compilation */
37 #if defined(CONFIG_WIN32)
38 #define CONFIG_FORMAT_COFF
39 #elif defined(CONFIG_DARWIN)
40 #define CONFIG_FORMAT_MACH
41 #else
42 #define CONFIG_FORMAT_ELF
43 #endif
44
45 #ifdef CONFIG_FORMAT_ELF
46
47 /* elf format definitions. We use these macros to test the CPU to
48 allow cross compilation (this tool must be ran on the build
49 platform) */
50 #if defined(HOST_I386)
51
52 #define ELF_CLASS ELFCLASS32
53 #define ELF_ARCH EM_386
54 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
55 #undef ELF_USES_RELOCA
56
57 #elif defined(HOST_X86_64)
58
59 #define ELF_CLASS ELFCLASS64
60 #define ELF_ARCH EM_X86_64
61 #define elf_check_arch(x) ((x) == EM_X86_64)
62 #define ELF_USES_RELOCA
63
64 #elif defined(HOST_PPC)
65
66 #define ELF_CLASS ELFCLASS32
67 #define ELF_ARCH EM_PPC
68 #define elf_check_arch(x) ((x) == EM_PPC)
69 #define ELF_USES_RELOCA
70
71 #elif defined(HOST_S390)
72
73 #define ELF_CLASS ELFCLASS32
74 #define ELF_ARCH EM_S390
75 #define elf_check_arch(x) ((x) == EM_S390)
76 #define ELF_USES_RELOCA
77
78 #elif defined(HOST_ALPHA)
79
80 #define ELF_CLASS ELFCLASS64
81 #define ELF_ARCH EM_ALPHA
82 #define elf_check_arch(x) ((x) == EM_ALPHA)
83 #define ELF_USES_RELOCA
84
85 #elif defined(HOST_IA64)
86
87 #define ELF_CLASS ELFCLASS64
88 #define ELF_ARCH EM_IA_64
89 #define elf_check_arch(x) ((x) == EM_IA_64)
90 #define ELF_USES_RELOCA
91
92 #elif defined(HOST_SPARC)
93
94 #define ELF_CLASS ELFCLASS32
95 #define ELF_ARCH EM_SPARC
96 #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
97 #define ELF_USES_RELOCA
98
99 #elif defined(HOST_SPARC64)
100
101 #define ELF_CLASS ELFCLASS64
102 #define ELF_ARCH EM_SPARCV9
103 #define elf_check_arch(x) ((x) == EM_SPARCV9)
104 #define ELF_USES_RELOCA
105
106 #elif defined(HOST_ARM)
107
108 #define ELF_CLASS ELFCLASS32
109 #define ELF_ARCH EM_ARM
110 #define elf_check_arch(x) ((x) == EM_ARM)
111 #define ELF_USES_RELOC
112
113 #elif defined(HOST_M68K)
114
115 #define ELF_CLASS ELFCLASS32
116 #define ELF_ARCH EM_68K
117 #define elf_check_arch(x) ((x) == EM_68K)
118 #define ELF_USES_RELOCA
119
120 #else
121 #error unsupported CPU - please update the code
122 #endif
123
124 #include "elf.h"
125
126 #if ELF_CLASS == ELFCLASS32
127 typedef int32_t host_long;
128 typedef uint32_t host_ulong;
129 #define swabls(x) swab32s(x)
130 #else
131 typedef int64_t host_long;
132 typedef uint64_t host_ulong;
133 #define swabls(x) swab64s(x)
134 #endif
135
136 #ifdef ELF_USES_RELOCA
137 #define SHT_RELOC SHT_RELA
138 #else
139 #define SHT_RELOC SHT_REL
140 #endif
141
142 #define EXE_RELOC ELF_RELOC
143 #define EXE_SYM ElfW(Sym)
144
145 #endif /* CONFIG_FORMAT_ELF */
146
147 #ifdef CONFIG_FORMAT_COFF
148
149 #include "a.out.h"
150
151 typedef int32_t host_long;
152 typedef uint32_t host_ulong;
153
154 #define FILENAMELEN 256
155
156 typedef struct coff_sym {
157 struct external_syment *st_syment;
158 char st_name[FILENAMELEN];
159 uint32_t st_value;
160 int st_size;
161 uint8_t st_type;
162 uint8_t st_shndx;
163 } coff_Sym;
164
165 typedef struct coff_rel {
166 struct external_reloc *r_reloc;
167 int r_offset;
168 uint8_t r_type;
169 } coff_Rel;
170
171 #define EXE_RELOC struct coff_rel
172 #define EXE_SYM struct coff_sym
173
174 #endif /* CONFIG_FORMAT_COFF */
175
176 #ifdef CONFIG_FORMAT_MACH
177
178 #include <mach-o/loader.h>
179 #include <mach-o/nlist.h>
180 #include <mach-o/reloc.h>
181 #include <mach-o/ppc/reloc.h>
182
183 # define check_mach_header(x) (x.magic == MH_MAGIC)
184 typedef int32_t host_long;
185 typedef uint32_t host_ulong;
186
187 struct nlist_extended
188 {
189 union {
190 char *n_name;
191 long n_strx;
192 } n_un;
193 unsigned char n_type;
194 unsigned char n_sect;
195 short st_desc;
196 unsigned long st_value;
197 unsigned long st_size;
198 };
199
200 #define EXE_RELOC struct relocation_info
201 #define EXE_SYM struct nlist_extended
202
203 #endif /* CONFIG_FORMAT_MACH */
204
205 #include "bswap.h"
206
207 enum {
208 OUT_GEN_OP,
209 OUT_CODE,
210 OUT_INDEX_OP,
211 };
212
213 /* all dynamically generated functions begin with this code */
214 #define OP_PREFIX "op_"
215
216 int do_swap;
217
218 void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
219 {
220 va_list ap;
221 va_start(ap, fmt);
222 fprintf(stderr, "dyngen: ");
223 vfprintf(stderr, fmt, ap);
224 fprintf(stderr, "\n");
225 va_end(ap);
226 exit(1);
227 }
228
229 void *load_data(int fd, long offset, unsigned int size)
230 {
231 char *data;
232
233 data = malloc(size);
234 if (!data)
235 return NULL;
236 lseek(fd, offset, SEEK_SET);
237 if (read(fd, data, size) != size) {
238 free(data);
239 return NULL;
240 }
241 return data;
242 }
243
244 int strstart(const char *str, const char *val, const char **ptr)
245 {
246 const char *p, *q;
247 p = str;
248 q = val;
249 while (*q != '\0') {
250 if (*p != *q)
251 return 0;
252 p++;
253 q++;
254 }
255 if (ptr)
256 *ptr = p;
257 return 1;
258 }
259
260 void pstrcpy(char *buf, int buf_size, const char *str)
261 {
262 int c;
263 char *q = buf;
264
265 if (buf_size <= 0)
266 return;
267
268 for(;;) {
269 c = *str++;
270 if (c == 0 || q >= buf + buf_size - 1)
271 break;
272 *q++ = c;
273 }
274 *q = '\0';
275 }
276
277 void swab16s(uint16_t *p)
278 {
279 *p = bswap16(*p);
280 }
281
282 void swab32s(uint32_t *p)
283 {
284 *p = bswap32(*p);
285 }
286
287 void swab64s(uint64_t *p)
288 {
289 *p = bswap64(*p);
290 }
291
292 uint16_t get16(uint16_t *p)
293 {
294 uint16_t val;
295 val = *p;
296 if (do_swap)
297 val = bswap16(val);
298 return val;
299 }
300
301 uint32_t get32(uint32_t *p)
302 {
303 uint32_t val;
304 val = *p;
305 if (do_swap)
306 val = bswap32(val);
307 return val;
308 }
309
310 void put16(uint16_t *p, uint16_t val)
311 {
312 if (do_swap)
313 val = bswap16(val);
314 *p = val;
315 }
316
317 void put32(uint32_t *p, uint32_t val)
318 {
319 if (do_swap)
320 val = bswap32(val);
321 *p = val;
322 }
323
324 /* executable information */
325 EXE_SYM *symtab;
326 int nb_syms;
327 int text_shndx;
328 uint8_t *text;
329 EXE_RELOC *relocs;
330 int nb_relocs;
331
332 #ifdef CONFIG_FORMAT_ELF
333
334 /* ELF file info */
335 struct elf_shdr *shdr;
336 uint8_t **sdata;
337 struct elfhdr ehdr;
338 char *strtab;
339
340 int elf_must_swap(struct elfhdr *h)
341 {
342 union {
343 uint32_t i;
344 uint8_t b[4];
345 } swaptest;
346
347 swaptest.i = 1;
348 return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
349 (swaptest.b[0] == 0);
350 }
351
352 void elf_swap_ehdr(struct elfhdr *h)
353 {
354 swab16s(&h->e_type); /* Object file type */
355 swab16s(&h-> e_machine); /* Architecture */
356 swab32s(&h-> e_version); /* Object file version */
357 swabls(&h-> e_entry); /* Entry point virtual address */
358 swabls(&h-> e_phoff); /* Program header table file offset */
359 swabls(&h-> e_shoff); /* Section header table file offset */
360 swab32s(&h-> e_flags); /* Processor-specific flags */
361 swab16s(&h-> e_ehsize); /* ELF header size in bytes */
362 swab16s(&h-> e_phentsize); /* Program header table entry size */
363 swab16s(&h-> e_phnum); /* Program header table entry count */
364 swab16s(&h-> e_shentsize); /* Section header table entry size */
365 swab16s(&h-> e_shnum); /* Section header table entry count */
366 swab16s(&h-> e_shstrndx); /* Section header string table index */
367 }
368
369 void elf_swap_shdr(struct elf_shdr *h)
370 {
371 swab32s(&h-> sh_name); /* Section name (string tbl index) */
372 swab32s(&h-> sh_type); /* Section type */
373 swabls(&h-> sh_flags); /* Section flags */
374 swabls(&h-> sh_addr); /* Section virtual addr at execution */
375 swabls(&h-> sh_offset); /* Section file offset */
376 swabls(&h-> sh_size); /* Section size in bytes */
377 swab32s(&h-> sh_link); /* Link to another section */
378 swab32s(&h-> sh_info); /* Additional section information */
379 swabls(&h-> sh_addralign); /* Section alignment */
380 swabls(&h-> sh_entsize); /* Entry size if section holds table */
381 }
382
383 void elf_swap_phdr(struct elf_phdr *h)
384 {
385 swab32s(&h->p_type); /* Segment type */
386 swabls(&h->p_offset); /* Segment file offset */
387 swabls(&h->p_vaddr); /* Segment virtual address */
388 swabls(&h->p_paddr); /* Segment physical address */
389 swabls(&h->p_filesz); /* Segment size in file */
390 swabls(&h->p_memsz); /* Segment size in memory */
391 swab32s(&h->p_flags); /* Segment flags */
392 swabls(&h->p_align); /* Segment alignment */
393 }
394
395 void elf_swap_rel(ELF_RELOC *rel)
396 {
397 swabls(&rel->r_offset);
398 swabls(&rel->r_info);
399 #ifdef ELF_USES_RELOCA
400 swabls(&rel->r_addend);
401 #endif
402 }
403
404 struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
405 const char *name)
406 {
407 int i;
408 const char *shname;
409 struct elf_shdr *sec;
410
411 for(i = 0; i < shnum; i++) {
412 sec = &shdr[i];
413 if (!sec->sh_name)
414 continue;
415 shname = shstr + sec->sh_name;
416 if (!strcmp(shname, name))
417 return sec;
418 }
419 return NULL;
420 }
421
422 int find_reloc(int sh_index)
423 {
424 struct elf_shdr *sec;
425 int i;
426
427 for(i = 0; i < ehdr.e_shnum; i++) {
428 sec = &shdr[i];
429 if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
430 return i;
431 }
432 return 0;
433 }
434
435 static host_ulong get_rel_offset(EXE_RELOC *rel)
436 {
437 return rel->r_offset;
438 }
439
440 static char *get_rel_sym_name(EXE_RELOC *rel)
441 {
442 return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
443 }
444
445 static char *get_sym_name(EXE_SYM *sym)
446 {
447 return strtab + sym->st_name;
448 }
449
450 /* load an elf object file */
451 int load_object(const char *filename)
452 {
453 int fd;
454 struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
455 int i, j;
456 ElfW(Sym) *sym;
457 char *shstr;
458 ELF_RELOC *rel;
459
460 fd = open(filename, O_RDONLY);
461 if (fd < 0)
462 error("can't open file '%s'", filename);
463
464 /* Read ELF header. */
465 if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
466 error("unable to read file header");
467
468 /* Check ELF identification. */
469 if (ehdr.e_ident[EI_MAG0] != ELFMAG0
470 || ehdr.e_ident[EI_MAG1] != ELFMAG1
471 || ehdr.e_ident[EI_MAG2] != ELFMAG2
472 || ehdr.e_ident[EI_MAG3] != ELFMAG3
473 || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
474 error("bad ELF header");
475 }
476
477 do_swap = elf_must_swap(&ehdr);
478 if (do_swap)
479 elf_swap_ehdr(&ehdr);
480 if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
481 error("Unsupported ELF class");
482 if (ehdr.e_type != ET_REL)
483 error("ELF object file expected");
484 if (ehdr.e_version != EV_CURRENT)
485 error("Invalid ELF version");
486 if (!elf_check_arch(ehdr.e_machine))
487 error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
488
489 /* read section headers */
490 shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
491 if (do_swap) {
492 for(i = 0; i < ehdr.e_shnum; i++) {
493 elf_swap_shdr(&shdr[i]);
494 }
495 }
496
497 /* read all section data */
498 sdata = malloc(sizeof(void *) * ehdr.e_shnum);
499 memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
500
501 for(i = 0;i < ehdr.e_shnum; i++) {
502 sec = &shdr[i];
503 if (sec->sh_type != SHT_NOBITS)
504 sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
505 }
506
507 sec = &shdr[ehdr.e_shstrndx];
508 shstr = sdata[ehdr.e_shstrndx];
509
510 /* swap relocations */
511 for(i = 0; i < ehdr.e_shnum; i++) {
512 sec = &shdr[i];
513 if (sec->sh_type == SHT_RELOC) {
514 nb_relocs = sec->sh_size / sec->sh_entsize;
515 if (do_swap) {
516 for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
517 elf_swap_rel(rel);
518 }
519 }
520 }
521 /* text section */
522
523 text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
524 if (!text_sec)
525 error("could not find .text section");
526 text_shndx = text_sec - shdr;
527 text = sdata[text_shndx];
528
529 /* find text relocations, if any */
530 relocs = NULL;
531 nb_relocs = 0;
532 i = find_reloc(text_shndx);
533 if (i != 0) {
534 relocs = (ELF_RELOC *)sdata[i];
535 nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
536 }
537
538 symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
539 if (!symtab_sec)
540 error("could not find .symtab section");
541 strtab_sec = &shdr[symtab_sec->sh_link];
542
543 symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
544 strtab = sdata[symtab_sec->sh_link];
545
546 nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
547 if (do_swap) {
548 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
549 swab32s(&sym->st_name);
550 swabls(&sym->st_value);
551 swabls(&sym->st_size);
552 swab16s(&sym->st_shndx);
553 }
554 }
555 close(fd);
556 return 0;
557 }
558
559 #endif /* CONFIG_FORMAT_ELF */
560
561 #ifdef CONFIG_FORMAT_COFF
562
563 /* COFF file info */
564 struct external_scnhdr *shdr;
565 uint8_t **sdata;
566 struct external_filehdr fhdr;
567 struct external_syment *coff_symtab;
568 char *strtab;
569 int coff_text_shndx, coff_data_shndx;
570
571 int data_shndx;
572
573 #define STRTAB_SIZE 4
574
575 #define DIR32 0x06
576 #define DISP32 0x14
577
578 #define T_FUNCTION 0x20
579 #define C_EXTERNAL 2
580
581 void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
582 {
583 char *q;
584 int c, i, len;
585
586 if (ext_sym->e.e.e_zeroes != 0) {
587 q = sym->st_name;
588 for(i = 0; i < 8; i++) {
589 c = ext_sym->e.e_name[i];
590 if (c == '\0')
591 break;
592 *q++ = c;
593 }
594 *q = '\0';
595 } else {
596 pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
597 }
598
599 /* now convert the name to a C name (suppress the leading '_') */
600 if (sym->st_name[0] == '_') {
601 len = strlen(sym->st_name);
602 memmove(sym->st_name, sym->st_name + 1, len - 1);
603 sym->st_name[len - 1] = '\0';
604 }
605 }
606
607 char *name_for_dotdata(struct coff_rel *rel)
608 {
609 int i;
610 struct coff_sym *sym;
611 uint32_t text_data;
612
613 text_data = *(uint32_t *)(text + rel->r_offset);
614
615 for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
616 if (sym->st_syment->e_scnum == data_shndx &&
617 text_data >= sym->st_value &&
618 text_data < sym->st_value + sym->st_size) {
619
620 return sym->st_name;
621
622 }
623 }
624 return NULL;
625 }
626
627 static char *get_sym_name(EXE_SYM *sym)
628 {
629 return sym->st_name;
630 }
631
632 static char *get_rel_sym_name(EXE_RELOC *rel)
633 {
634 char *name;
635 name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
636 if (!strcmp(name, ".data"))
637 name = name_for_dotdata(rel);
638 return name;
639 }
640
641 static host_ulong get_rel_offset(EXE_RELOC *rel)
642 {
643 return rel->r_offset;
644 }
645
646 struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
647 {
648 int i;
649 const char *shname;
650 struct external_scnhdr *sec;
651
652 for(i = 0; i < shnum; i++) {
653 sec = &shdr[i];
654 if (!sec->s_name)
655 continue;
656 shname = sec->s_name;
657 if (!strcmp(shname, name))
658 return sec;
659 }
660 return NULL;
661 }
662
663 /* load a coff object file */
664 int load_object(const char *filename)
665 {
666 int fd;
667 struct external_scnhdr *sec, *text_sec, *data_sec;
668 int i;
669 struct external_syment *ext_sym;
670 struct external_reloc *coff_relocs;
671 struct external_reloc *ext_rel;
672 uint32_t *n_strtab;
673 EXE_SYM *sym;
674 EXE_RELOC *rel;
675
676 fd = open(filename, O_RDONLY
677 #ifdef _WIN32
678 | O_BINARY
679 #endif
680 );
681 if (fd < 0)
682 error("can't open file '%s'", filename);
683
684 /* Read COFF header. */
685 if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
686 error("unable to read file header");
687
688 /* Check COFF identification. */
689 if (fhdr.f_magic != I386MAGIC) {
690 error("bad COFF header");
691 }
692 do_swap = 0;
693
694 /* read section headers */
695 shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
696
697 /* read all section data */
698 sdata = malloc(sizeof(void *) * fhdr.f_nscns);
699 memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
700
701 const char *p;
702 for(i = 0;i < fhdr.f_nscns; i++) {
703 sec = &shdr[i];
704 if (!strstart(sec->s_name, ".bss", &p))
705 sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
706 }
707
708
709 /* text section */
710 text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
711 if (!text_sec)
712 error("could not find .text section");
713 coff_text_shndx = text_sec - shdr;
714 text = sdata[coff_text_shndx];
715
716 /* data section */
717 data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
718 if (!data_sec)
719 error("could not find .data section");
720 coff_data_shndx = data_sec - shdr;
721
722 coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
723 for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
724 for(i=0;i<8;i++)
725 printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
726 printf("\n");
727 }
728
729
730 n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
731 strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);
732
733 nb_syms = fhdr.f_nsyms;
734
735 for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
736 if (strstart(ext_sym->e.e_name, ".text", NULL))
737 text_shndx = ext_sym->e_scnum;
738 if (strstart(ext_sym->e.e_name, ".data", NULL))
739 data_shndx = ext_sym->e_scnum;
740 }
741
742 /* set coff symbol */
743 symtab = malloc(sizeof(struct coff_sym) * nb_syms);
744
745 int aux_size, j;
746 for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
747 memset(sym, 0, sizeof(*sym));
748 sym->st_syment = ext_sym;
749 sym_ent_name(ext_sym, sym);
750 sym->st_value = ext_sym->e_value;
751
752 aux_size = *(int8_t *)ext_sym->e_numaux;
753 if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
754 for (j = aux_size + 1; j < nb_syms - i; j++) {
755 if ((ext_sym + j)->e_scnum == text_shndx &&
756 (ext_sym + j)->e_type == T_FUNCTION ){
757 sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
758 break;
759 } else if (j == nb_syms - i - 1) {
760 sec = &shdr[coff_text_shndx];
761 sym->st_size = sec->s_size - ext_sym->e_value;
762 break;
763 }
764 }
765 } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
766 for (j = aux_size + 1; j < nb_syms - i; j++) {
767 if ((ext_sym + j)->e_scnum == data_shndx) {
768 sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
769 break;
770 } else if (j == nb_syms - i - 1) {
771 sec = &shdr[coff_data_shndx];
772 sym->st_size = sec->s_size - ext_sym->e_value;
773 break;
774 }
775 }
776 } else {
777 sym->st_size = 0;
778 }
779
780 sym->st_type = ext_sym->e_type;
781 sym->st_shndx = ext_sym->e_scnum;
782 }
783
784
785 /* find text relocations, if any */
786 sec = &shdr[coff_text_shndx];
787 coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
788 nb_relocs = sec->s_nreloc;
789
790 /* set coff relocation */
791 relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
792 for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
793 i++, ext_rel++, rel++) {
794 memset(rel, 0, sizeof(*rel));
795 rel->r_reloc = ext_rel;
796 rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
797 rel->r_type = *(uint16_t *)ext_rel->r_type;
798 }
799 return 0;
800 }
801
802 #endif /* CONFIG_FORMAT_COFF */
803
804 #ifdef CONFIG_FORMAT_MACH
805
806 /* File Header */
807 struct mach_header mach_hdr;
808
809 /* commands */
810 struct segment_command *segment = 0;
811 struct dysymtab_command *dysymtabcmd = 0;
812 struct symtab_command *symtabcmd = 0;
813
814 /* section */
815 struct section *section_hdr;
816 struct section *text_sec_hdr;
817 uint8_t **sdata;
818
819 /* relocs */
820 struct relocation_info *relocs;
821
822 /* symbols */
823 EXE_SYM *symtab;
824 struct nlist *symtab_std;
825 char *strtab;
826
827 /* indirect symbols */
828 uint32_t *tocdylib;
829
830 /* Utility functions */
831
832 static inline char *find_str_by_index(int index)
833 {
834 return strtab+index;
835 }
836
837 /* Used by dyngen common code */
838 static char *get_sym_name(EXE_SYM *sym)
839 {
840 char *name = find_str_by_index(sym->n_un.n_strx);
841
842 if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
843 return "debug";
844
845 if(!name)
846 return name;
847 if(name[0]=='_')
848 return name + 1;
849 else
850 return name;
851 }
852
853 /* find a section index given its segname, sectname */
854 static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
855 const char *sectname)
856 {
857 int i;
858 struct section *sec = section_hdr;
859
860 for(i = 0; i < shnum; i++, sec++) {
861 if (!sec->segname || !sec->sectname)
862 continue;
863 if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
864 return i;
865 }
866 return -1;
867 }
868
869 /* find a section header given its segname, sectname */
870 struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
871 const char *sectname)
872 {
873 int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
874 if(index == -1)
875 return NULL;
876 return section_hdr+index;
877 }
878
879
880 static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
881 {
882 struct scattered_relocation_info * scarel;
883
884 if(R_SCATTERED & rel->r_address) {
885 scarel = (struct scattered_relocation_info*)rel;
886 if(scarel->r_type != PPC_RELOC_PAIR)
887 error("fetch_next_pair_value: looking for a pair which was not found (1)");
888 *value = scarel->r_value;
889 } else {
890 if(rel->r_type != PPC_RELOC_PAIR)
891 error("fetch_next_pair_value: looking for a pair which was not found (2)");
892 *value = rel->r_address;
893 }
894 }
895
896 /* find a sym name given its value, in a section number */
897 static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
898 {
899 int i, ret = -1;
900
901 for( i = 0 ; i < nb_syms; i++ )
902 {
903 if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
904 (symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) )
905 {
906 if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
907 ret = i;
908 }
909 }
910 if( ret < 0 ) {
911 *offset = 0;
912 return 0;
913 } else {
914 *offset = value - symtab[ret].st_value;
915 return get_sym_name(&symtab[ret]);
916 }
917 }
918
919 /*
920 * Find symbol name given a (virtual) address, and a section which is of type
921 * S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
922 */
923 static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
924 {
925 unsigned int tocindex, symindex, size;
926 const char *name = 0;
927
928 /* Sanity check */
929 if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
930 return (char*)0;
931
932 if( sec_hdr->flags & S_SYMBOL_STUBS ){
933 size = sec_hdr->reserved2;
934 if(size == 0)
935 error("size = 0");
936
937 }
938 else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
939 sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
940 size = sizeof(unsigned long);
941 else
942 return 0;
943
944 /* Compute our index in toc */
945 tocindex = (address - sec_hdr->addr)/size;
946 symindex = tocdylib[sec_hdr->reserved1 + tocindex];
947
948 name = get_sym_name(&symtab[symindex]);
949
950 return name;
951 }
952
953 static const char * find_reloc_name_given_its_address(int address)
954 {
955 unsigned int i;
956 for(i = 0; i < segment->nsects ; i++)
957 {
958 const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
959 if((long)name != -1)
960 return name;
961 }
962 return 0;
963 }
964
965 static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
966 {
967 char * name = 0;
968 struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
969 int sectnum = rel->r_symbolnum;
970 int sectoffset;
971 int other_half=0;
972
973 /* init the slide value */
974 *sslide = 0;
975
976 if(R_SCATTERED & rel->r_address)
977 return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
978
979 if(rel->r_extern)
980 {
981 /* ignore debug sym */
982 if ( symtab[rel->r_symbolnum].n_type & N_STAB )
983 return 0;
984 return get_sym_name(&symtab[rel->r_symbolnum]);
985 }
986
987 /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
988 sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
989
990 if(sectnum==0xffffff)
991 return 0;
992
993 /* Sanity Check */
994 if(sectnum > segment->nsects)
995 error("sectnum > segment->nsects");
996
997 switch(rel->r_type)
998 {
999 case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
1000 break;
1001 case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
1002 break;
1003 case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
1004 break;
1005 case PPC_RELOC_BR24:
1006 sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
1007 if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
1008 break;
1009 default:
1010 error("switch(rel->type) not found");
1011 }
1012
1013 if(rel->r_pcrel)
1014 sectoffset += rel->r_address;
1015
1016 if (rel->r_type == PPC_RELOC_BR24)
1017 name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1018
1019 /* search it in the full symbol list, if not found */
1020 if(!name)
1021 name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1022
1023 return name;
1024 }
1025
1026 /* Used by dyngen common code */
1027 static const char * get_rel_sym_name(EXE_RELOC * rel)
1028 {
1029 int sslide;
1030 return get_reloc_name( rel, &sslide);
1031 }
1032
1033 /* Used by dyngen common code */
1034 static host_ulong get_rel_offset(EXE_RELOC *rel)
1035 {
1036 struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1037 if(R_SCATTERED & rel->r_address)
1038 return sca_rel->r_address;
1039 else
1040 return rel->r_address;
1041 }
1042
1043 /* load a mach-o object file */
1044 int load_object(const char *filename)
1045 {
1046 int fd;
1047 unsigned int offset_to_segment = 0;
1048 unsigned int offset_to_dysymtab = 0;
1049 unsigned int offset_to_symtab = 0;
1050 struct load_command lc;
1051 unsigned int i, j;
1052 EXE_SYM *sym;
1053 struct nlist *syment;
1054
1055 fd = open(filename, O_RDONLY);
1056 if (fd < 0)
1057 error("can't open file '%s'", filename);
1058
1059 /* Read Mach header. */
1060 if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1061 error("unable to read file header");
1062
1063 /* Check Mach identification. */
1064 if (!check_mach_header(mach_hdr)) {
1065 error("bad Mach header");
1066 }
1067
1068 if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1069 error("Unsupported CPU");
1070
1071 if (mach_hdr.filetype != MH_OBJECT)
1072 error("Unsupported Mach Object");
1073
1074 /* read segment headers */
1075 for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1076 {
1077 if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1078 error("unable to read load_command");
1079 if(lc.cmd == LC_SEGMENT)
1080 {
1081 offset_to_segment = j;
1082 lseek(fd, offset_to_segment, SEEK_SET);
1083 segment = malloc(sizeof(struct segment_command));
1084 if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1085 error("unable to read LC_SEGMENT");
1086 }
1087 if(lc.cmd == LC_DYSYMTAB)
1088 {
1089 offset_to_dysymtab = j;
1090 lseek(fd, offset_to_dysymtab, SEEK_SET);
1091 dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1092 if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1093 error("unable to read LC_DYSYMTAB");
1094 }
1095 if(lc.cmd == LC_SYMTAB)
1096 {
1097 offset_to_symtab = j;
1098 lseek(fd, offset_to_symtab, SEEK_SET);
1099 symtabcmd = malloc(sizeof(struct symtab_command));
1100 if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1101 error("unable to read LC_SYMTAB");
1102 }
1103 j+=lc.cmdsize;
1104
1105 lseek(fd, j, SEEK_SET);
1106 }
1107
1108 if(!segment)
1109 error("unable to find LC_SEGMENT");
1110
1111 /* read section headers */
1112 section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1113
1114 /* read all section data */
1115 sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
1116 memset(sdata, 0, sizeof(void *) * segment->nsects);
1117
1118 /* Load the data in section data */
1119 for(i = 0; i < segment->nsects; i++) {
1120 sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1121 }
1122
1123 /* text section */
1124 text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1125 i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1126 if (i == -1 || !text_sec_hdr)
1127 error("could not find __TEXT,__text section");
1128 text = sdata[i];
1129
1130 /* Make sure dysym was loaded */
1131 if(!(int)dysymtabcmd)
1132 error("could not find __DYSYMTAB segment");
1133
1134 /* read the table of content of the indirect sym */
1135 tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1136
1137 /* Make sure symtab was loaded */
1138 if(!(int)symtabcmd)
1139 error("could not find __SYMTAB segment");
1140 nb_syms = symtabcmd->nsyms;
1141
1142 symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1143 strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1144
1145 symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1146
1147 /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1148 for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1149 struct nlist *sym_follow, *sym_next = 0;
1150 unsigned int j;
1151 memset(sym, 0, sizeof(*sym));
1152
1153 if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
1154 continue;
1155
1156 memcpy(sym, syment, sizeof(*syment));
1157
1158 /* Find the following symbol in order to get the current symbol size */
1159 for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1160 if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
1161 continue;
1162 if(!sym_next) {
1163 sym_next = sym_follow;
1164 continue;
1165 }
1166 if(!(sym_next->n_value > sym_follow->n_value))
1167 continue;
1168 sym_next = sym_follow;
1169 }
1170 if(sym_next)
1171 sym->st_size = sym_next->n_value - sym->st_value;
1172 else
1173 sym->st_size = text_sec_hdr->size - sym->st_value;
1174 }
1175
1176 /* Find Reloc */
1177 relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1178 nb_relocs = text_sec_hdr->nreloc;
1179
1180 close(fd);
1181 return 0;
1182 }
1183
1184 #endif /* CONFIG_FORMAT_MACH */
1185
1186 void get_reloc_expr(char *name, int name_size, const char *sym_name)
1187 {
1188 const char *p;
1189
1190 if (strstart(sym_name, "__op_param", &p)) {
1191 snprintf(name, name_size, "param%s", p);
1192 } else if (strstart(sym_name, "__op_gen_label", &p)) {
1193 snprintf(name, name_size, "gen_labels[param%s]", p);
1194 } else {
1195 #ifdef HOST_SPARC
1196 if (sym_name[0] == '.')
1197 snprintf(name, sizeof(name),
1198 "(long)(&__dot_%s)",
1199 sym_name + 1);
1200 else
1201 #endif
1202 snprintf(name, name_size, "(long)(&%s)", sym_name);
1203 }
1204 }
1205
1206 #ifdef HOST_IA64
1207
1208 #define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */
1209
1210 struct plt_entry {
1211 struct plt_entry *next;
1212 const char *name;
1213 unsigned long addend;
1214 } *plt_list;
1215
1216 static int
1217 get_plt_index (const char *name, unsigned long addend)
1218 {
1219 struct plt_entry *plt, *prev= NULL;
1220 int index = 0;
1221
1222 /* see if we already have an entry for this target: */
1223 for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
1224 if (strcmp(plt->name, name) == 0 && plt->addend == addend)
1225 return index;
1226
1227 /* nope; create a new PLT entry: */
1228
1229 plt = malloc(sizeof(*plt));
1230 if (!plt) {
1231 perror("malloc");
1232 exit(1);
1233 }
1234 memset(plt, 0, sizeof(*plt));
1235 plt->name = strdup(name);
1236 plt->addend = addend;
1237
1238 /* append to plt-list: */
1239 if (prev)
1240 prev->next = plt;
1241 else
1242 plt_list = plt;
1243 return index;
1244 }
1245
1246 #endif
1247
1248 #ifdef HOST_ARM
1249
1250 int arm_emit_ldr_info(const char *name, unsigned long start_offset,
1251 FILE *outfile, uint8_t *p_start, uint8_t *p_end,
1252 ELF_RELOC *relocs, int nb_relocs)
1253 {
1254 uint8_t *p;
1255 uint32_t insn;
1256 int offset, min_offset, pc_offset, data_size;
1257 uint8_t data_allocated[1024];
1258 unsigned int data_index;
1259
1260 memset(data_allocated, 0, sizeof(data_allocated));
1261
1262 p = p_start;
1263 min_offset = p_end - p_start;
1264 while (p < p_start + min_offset) {
1265 insn = get32((uint32_t *)p);
1266 if ((insn & 0x0d5f0000) == 0x051f0000) {
1267 /* ldr reg, [pc, #im] */
1268 offset = insn & 0xfff;
1269 if (!(insn & 0x00800000))
1270 offset = -offset;
1271 if ((offset & 3) !=0)
1272 error("%s:%04x: ldr pc offset must be 32 bit aligned",
1273 name, start_offset + p - p_start);
1274 pc_offset = p - p_start + offset + 8;
1275 if (pc_offset <= (p - p_start) ||
1276 pc_offset >= (p_end - p_start))
1277 error("%s:%04x: ldr pc offset must point inside the function code",
1278 name, start_offset + p - p_start);
1279 if (pc_offset < min_offset)
1280 min_offset = pc_offset;
1281 if (outfile) {
1282 /* ldr position */
1283 fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
1284 p - p_start);
1285 /* ldr data index */
1286 data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
1287 fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
1288 data_index);
1289 fprintf(outfile, " arm_ldr_ptr++;\n");
1290 if (data_index >= sizeof(data_allocated))
1291 error("%s: too many data", name);
1292 if (!data_allocated[data_index]) {
1293 ELF_RELOC *rel;
1294 int i, addend, type;
1295 const char *sym_name, *p;
1296 char relname[1024];
1297
1298 data_allocated[data_index] = 1;
1299
1300 /* data value */
1301 addend = get32((uint32_t *)(p_start + pc_offset));
1302 relname[0] = '\0';
1303 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1304 if (rel->r_offset == (pc_offset + start_offset)) {
1305 sym_name = get_rel_sym_name(rel);
1306 /* the compiler leave some unnecessary references to the code */
1307 get_reloc_expr(relname, sizeof(relname), sym_name);
1308 type = ELF32_R_TYPE(rel->r_info);
1309 if (type != R_ARM_ABS32)
1310 error("%s: unsupported data relocation", name);
1311 break;
1312 }
1313 }
1314 fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
1315 data_index, addend);
1316 if (relname[0] != '\0')
1317 fprintf(outfile, " + %s", relname);
1318 fprintf(outfile, ";\n");
1319 }
1320 }
1321 }
1322 p += 4;
1323 }
1324 data_size = (p_end - p_start) - min_offset;
1325 if (data_size > 0 && outfile) {
1326 fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2);
1327 }
1328
1329 /* the last instruction must be a mov pc, lr */
1330 if (p == p_start)
1331 goto arm_ret_error;
1332 p -= 4;
1333 insn = get32((uint32_t *)p);
1334 if ((insn & 0xffff0000) != 0xe91b0000) {
1335 arm_ret_error:
1336 if (!outfile)
1337 printf("%s: invalid epilog\n", name);
1338 }
1339 return p - p_start;
1340 }
1341 #endif
1342
1343
1344 #define MAX_ARGS 3
1345
1346 /* generate op code */
1347 void gen_code(const char *name, host_ulong offset, host_ulong size,
1348 FILE *outfile, int gen_switch)
1349 {
1350 int copy_size = 0;
1351 uint8_t *p_start, *p_end;
1352 host_ulong start_offset;
1353 int nb_args, i, n;
1354 uint8_t args_present[MAX_ARGS];
1355 const char *sym_name, *p;
1356 EXE_RELOC *rel;
1357
1358 /* Compute exact size excluding prologue and epilogue instructions.
1359 * Increment start_offset to skip epilogue instructions, then compute
1360 * copy_size the indicate the size of the remaining instructions (in
1361 * bytes).
1362 */
1363 p_start = text + offset;
1364 p_end = p_start + size;
1365 start_offset = offset;
1366 #if defined(HOST_I386) || defined(HOST_X86_64)
1367 #ifdef CONFIG_FORMAT_COFF
1368 {
1369 uint8_t *p;
1370 p = p_end - 1;
1371 if (p == p_start)
1372 error("empty code for %s", name);
1373 while (*p != 0xc3) {
1374 p--;
1375 if (p <= p_start)
1376 error("ret or jmp expected at the end of %s", name);
1377 }
1378 copy_size = p - p_start;
1379 }
1380 #else
1381 {
1382 int len;
1383 len = p_end - p_start;
1384 if (len == 0)
1385 error("empty code for %s", name);
1386 if (p_end[-1] == 0xc3) {
1387 len--;
1388 } else {
1389 error("ret or jmp expected at the end of %s", name);
1390 }
1391 copy_size = len;
1392 }
1393 #endif
1394 #elif defined(HOST_PPC)
1395 {
1396 uint8_t *p;
1397 p = (void *)(p_end - 4);
1398 if (p == p_start)
1399 error("empty code for %s", name);
1400 if (get32((uint32_t *)p) != 0x4e800020)
1401 error("blr expected at the end of %s", name);
1402 copy_size = p - p_start;
1403 }
1404 #elif defined(HOST_S390)
1405 {
1406 uint8_t *p;
1407 p = (void *)(p_end - 2);
1408 if (p == p_start)
1409 error("empty code for %s", name);
1410 if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
1411 error("br %%r14 expected at the end of %s", name);
1412 copy_size = p - p_start;
1413 }
1414 #elif defined(HOST_ALPHA)
1415 {
1416 uint8_t *p;
1417 p = p_end - 4;
1418 #if 0
1419 /* XXX: check why it occurs */
1420 if (p == p_start)
1421 error("empty code for %s", name);
1422 #endif
1423 if (get32((uint32_t *)p) != 0x6bfa8001)
1424 error("ret expected at the end of %s", name);
1425 copy_size = p - p_start;
1426 }
1427 #elif defined(HOST_IA64)
1428 {
1429 uint8_t *p;
1430 p = (void *)(p_end - 4);
1431 if (p == p_start)
1432 error("empty code for %s", name);
1433 /* br.ret.sptk.many b0;; */
1434 /* 08 00 84 00 */
1435 if (get32((uint32_t *)p) != 0x00840008)
1436 error("br.ret.sptk.many b0;; expected at the end of %s", name);
1437 copy_size = p_end - p_start;
1438 }
1439 #elif defined(HOST_SPARC)
1440 {
1441 uint32_t start_insn, end_insn1, end_insn2;
1442 uint8_t *p;
1443 p = (void *)(p_end - 8);
1444 if (p <= p_start)
1445 error("empty code for %s", name);
1446 start_insn = get32((uint32_t *)(p_start + 0x0));
1447 end_insn1 = get32((uint32_t *)(p + 0x0));
1448 end_insn2 = get32((uint32_t *)(p + 0x4));
1449 if ((start_insn & ~0x1fff) == 0x9de3a000) {
1450 p_start += 0x4;
1451 start_offset += 0x4;
1452 if ((int)(start_insn | ~0x1fff) < -128)
1453 error("Found bogus save at the start of %s", name);
1454 if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1455 error("ret; restore; not found at end of %s", name);
1456 } else {
1457 error("No save at the beginning of %s", name);
1458 }
1459 #if 0
1460 /* Skip a preceeding nop, if present. */
1461 if (p > p_start) {
1462 skip_insn = get32((uint32_t *)(p - 0x4));
1463 if (skip_insn == 0x01000000)
1464 p -= 4;
1465 }
1466 #endif
1467 copy_size = p - p_start;
1468 }
1469 #elif defined(HOST_SPARC64)
1470 {
1471 uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1472 uint8_t *p;
1473 p = (void *)(p_end - 8);
1474 if (p <= p_start)
1475 error("empty code for %s", name);
1476 start_insn = get32((uint32_t *)(p_start + 0x0));
1477 end_insn1 = get32((uint32_t *)(p + 0x0));
1478 end_insn2 = get32((uint32_t *)(p + 0x4));
1479 if ((start_insn & ~0x1fff) == 0x9de3a000) {
1480 p_start += 0x4;
1481 start_offset += 0x4;
1482 if ((int)(start_insn | ~0x1fff) < -256)
1483 error("Found bogus save at the start of %s", name);
1484 if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1485 error("ret; restore; not found at end of %s", name);
1486 } else {
1487 error("No save at the beginning of %s", name);
1488 }
1489
1490 /* Skip a preceeding nop, if present. */
1491 if (p > p_start) {
1492 skip_insn = get32((uint32_t *)(p - 0x4));
1493 if (skip_insn == 0x01000000)
1494 p -= 4;
1495 }
1496
1497 copy_size = p - p_start;
1498 }
1499 #elif defined(HOST_ARM)
1500 {
1501 if ((p_end - p_start) <= 16)
1502 error("%s: function too small", name);
1503 if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
1504 (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
1505 get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
1506 error("%s: invalid prolog", name);
1507 p_start += 12;
1508 start_offset += 12;
1509 copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
1510 relocs, nb_relocs);
1511 }
1512 #elif defined(HOST_M68K)
1513 {
1514 uint8_t *p;
1515 p = (void *)(p_end - 2);
1516 if (p == p_start)
1517 error("empty code for %s", name);
1518 // remove NOP's, probably added for alignment
1519 while ((get16((uint16_t *)p) == 0x4e71) &&
1520 (p>p_start))
1521 p -= 2;
1522 if (get16((uint16_t *)p) != 0x4e75)
1523 error("rts expected at the end of %s", name);
1524 copy_size = p - p_start;
1525 }
1526 #else
1527 #error unsupported CPU
1528 #endif
1529
1530 /* compute the number of arguments by looking at the relocations */
1531 for(i = 0;i < MAX_ARGS; i++)
1532 args_present[i] = 0;
1533
1534 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1535 host_ulong offset = get_rel_offset(rel);
1536 if (offset >= start_offset &&
1537 offset < start_offset + (p_end - p_start)) {
1538 sym_name = get_rel_sym_name(rel);
1539 if(!sym_name)
1540 continue;
1541 if (strstart(sym_name, "__op_param", &p) ||
1542 strstart(sym_name, "__op_gen_label", &p)) {
1543 n = strtoul(p, NULL, 10);
1544 if (n > MAX_ARGS)
1545 error("too many arguments in %s", name);
1546 args_present[n - 1] = 1;
1547 }
1548 }
1549 }
1550
1551 nb_args = 0;
1552 while (nb_args < MAX_ARGS && args_present[nb_args])
1553 nb_args++;
1554 for(i = nb_args; i < MAX_ARGS; i++) {
1555 if (args_present[i])
1556 error("inconsistent argument numbering in %s", name);
1557 }
1558
1559 if (gen_switch == 2) {
1560 fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1561 } else if (gen_switch == 1) {
1562
1563 /* output C code */
1564 fprintf(outfile, "case INDEX_%s: {\n", name);
1565 if (nb_args > 0) {
1566 fprintf(outfile, " long ");
1567 for(i = 0; i < nb_args; i++) {
1568 if (i != 0)
1569 fprintf(outfile, ", ");
1570 fprintf(outfile, "param%d", i + 1);
1571 }
1572 fprintf(outfile, ";\n");
1573 }
1574 #if defined(HOST_IA64)
1575 fprintf(outfile, " extern char %s;\n", name);
1576 #else
1577 fprintf(outfile, " extern void %s();\n", name);
1578 #endif
1579
1580 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1581 host_ulong offset = get_rel_offset(rel);
1582 if (offset >= start_offset &&
1583 offset < start_offset + (p_end - p_start)) {
1584 sym_name = get_rel_sym_name(rel);
1585 if(!sym_name)
1586 continue;
1587 if (*sym_name &&
1588 !strstart(sym_name, "__op_param", NULL) &&
1589 !strstart(sym_name, "__op_jmp", NULL) &&
1590 !strstart(sym_name, "__op_gen_label", NULL)) {
1591 #if defined(HOST_SPARC)
1592 if (sym_name[0] == '.') {
1593 fprintf(outfile,
1594 "extern char __dot_%s __asm__(\"%s\");\n",
1595 sym_name+1, sym_name);
1596 continue;
1597 }
1598 #endif
1599 #if defined(__APPLE__)
1600 /* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
1601 fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
1602 #elif defined(HOST_IA64)
1603 if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
1604 /*
1605 * PCREL21 br.call targets generally
1606 * are out of range and need to go
1607 * through an "import stub".
1608 */
1609 fprintf(outfile, " extern char %s;\n",
1610 sym_name);
1611 #else
1612 fprintf(outfile, "extern char %s;\n", sym_name);
1613 #endif
1614 }
1615 }
1616 }
1617
1618 fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1619 name, (int)(start_offset - offset), copy_size);
1620
1621 /* emit code offset information */
1622 {
1623 EXE_SYM *sym;
1624 const char *sym_name, *p;
1625 unsigned long val;
1626 int n;
1627
1628 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1629 sym_name = get_sym_name(sym);
1630 if (strstart(sym_name, "__op_label", &p)) {
1631 uint8_t *ptr;
1632 unsigned long offset;
1633
1634 /* test if the variable refers to a label inside
1635 the code we are generating */
1636 #ifdef CONFIG_FORMAT_COFF
1637 if (sym->st_shndx == text_shndx) {
1638 ptr = sdata[coff_text_shndx];
1639 } else if (sym->st_shndx == data_shndx) {
1640 ptr = sdata[coff_data_shndx];
1641 } else {
1642 ptr = NULL;
1643 }
1644 #elif defined(CONFIG_FORMAT_MACH)
1645 if(!sym->n_sect)
1646 continue;
1647 ptr = sdata[sym->n_sect-1];
1648 #else
1649 ptr = sdata[sym->st_shndx];
1650 #endif
1651 if (!ptr)
1652 error("__op_labelN in invalid section");
1653 offset = sym->st_value;
1654 #ifdef CONFIG_FORMAT_MACH
1655 offset -= section_hdr[sym->n_sect-1].addr;
1656 #endif
1657 val = *(unsigned long *)(ptr + offset);
1658 #ifdef ELF_USES_RELOCA
1659 {
1660 int reloc_shndx, nb_relocs1, j;
1661
1662 /* try to find a matching relocation */
1663 reloc_shndx = find_reloc(sym->st_shndx);
1664 if (reloc_shndx) {
1665 nb_relocs1 = shdr[reloc_shndx].sh_size /
1666 shdr[reloc_shndx].sh_entsize;
1667 rel = (ELF_RELOC *)sdata[reloc_shndx];
1668 for(j = 0; j < nb_relocs1; j++) {
1669 if (rel->r_offset == offset) {
1670 val = rel->r_addend;
1671 break;
1672 }
1673 rel++;
1674 }
1675 }
1676 }
1677 #endif
1678 if (val >= start_offset && val <= start_offset + copy_size) {
1679 n = strtol(p, NULL, 10);
1680 fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
1681 }
1682 }
1683 }
1684 }
1685
1686 /* load parameres in variables */
1687 for(i = 0; i < nb_args; i++) {
1688 fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
1689 }
1690
1691 /* patch relocations */
1692 #if defined(HOST_I386)
1693 {
1694 char name[256];
1695 int type;
1696 int addend;
1697 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1698 if (rel->r_offset >= start_offset &&
1699 rel->r_offset < start_offset + copy_size) {
1700 sym_name = get_rel_sym_name(rel);
1701 if (strstart(sym_name, "__op_jmp", &p)) {
1702 int n;
1703 n = strtol(p, NULL, 10);
1704 /* __op_jmp relocations are done at
1705 runtime to do translated block
1706 chaining: the offset of the instruction
1707 needs to be stored */
1708 fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1709 n, rel->r_offset - start_offset);
1710 continue;
1711 }
1712
1713 get_reloc_expr(name, sizeof(name), sym_name);
1714 addend = get32((uint32_t *)(text + rel->r_offset));
1715 #ifdef CONFIG_FORMAT_ELF
1716 type = ELF32_R_TYPE(rel->r_info);
1717 switch(type) {
1718 case R_386_32:
1719 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1720 rel->r_offset - start_offset, name, addend);
1721 break;
1722 case R_386_PC32:
1723 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1724 rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1725 break;
1726 default:
1727 error("unsupported i386 relocation (%d)", type);
1728 }
1729 #elif defined(CONFIG_FORMAT_COFF)
1730 {
1731 char *temp_name;
1732 int j;
1733 EXE_SYM *sym;
1734 temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
1735 if (!strcmp(temp_name, ".data")) {
1736 for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1737 if (strstart(sym->st_name, sym_name, NULL)) {
1738 addend -= sym->st_value;
1739 }
1740 }
1741 }
1742 }
1743 type = rel->r_type;
1744 switch(type) {
1745 case DIR32:
1746 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1747 rel->r_offset - start_offset, name, addend);
1748 break;
1749 case DISP32:
1750 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1751 rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1752 break;
1753 default:
1754 error("unsupported i386 relocation (%d)", type);
1755 }
1756 #else
1757 #error unsupport object format
1758 #endif
1759 }
1760 }
1761 }
1762 #elif defined(HOST_X86_64)
1763 {
1764 char name[256];
1765 int type;
1766 int addend;
1767 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1768 if (rel->r_offset >= start_offset &&
1769 rel->r_offset < start_offset + copy_size) {
1770 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1771 get_reloc_expr(name, sizeof(name), sym_name);
1772 type = ELF32_R_TYPE(rel->r_info);
1773 addend = rel->r_addend;
1774 switch(type) {
1775 case R_X86_64_32:
1776 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
1777 rel->r_offset - start_offset, name, addend);
1778 break;
1779 case R_X86_64_32S:
1780 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
1781 rel->r_offset - start_offset, name, addend);
1782 break;
1783 case R_X86_64_PC32:
1784 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1785 rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1786 break;
1787 default:
1788 error("unsupported X86_64 relocation (%d)", type);
1789 }
1790 }
1791 }
1792 }
1793 #elif defined(HOST_PPC)
1794 {
1795 #ifdef CONFIG_FORMAT_ELF
1796 char name[256];
1797 int type;
1798 int addend;
1799 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1800 if (rel->r_offset >= start_offset &&
1801 rel->r_offset < start_offset + copy_size) {
1802 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1803 if (strstart(sym_name, "__op_jmp", &p)) {
1804 int n;
1805 n = strtol(p, NULL, 10);
1806 /* __op_jmp relocations are done at
1807 runtime to do translated block
1808 chaining: the offset of the instruction
1809 needs to be stored */
1810 fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1811 n, rel->r_offset - start_offset);
1812 continue;
1813 }
1814
1815 get_reloc_expr(name, sizeof(name), sym_name);
1816 type = ELF32_R_TYPE(rel->r_info);
1817 addend = rel->r_addend;
1818 switch(type) {
1819 case R_PPC_ADDR32:
1820 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1821 rel->r_offset - start_offset, name, addend);
1822 break;
1823 case R_PPC_ADDR16_LO:
1824 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
1825 rel->r_offset - start_offset, name, addend);
1826 break;
1827 case R_PPC_ADDR16_HI:
1828 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
1829 rel->r_offset - start_offset, name, addend);
1830 break;
1831 case R_PPC_ADDR16_HA:
1832 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
1833 rel->r_offset - start_offset, name, addend);
1834 break;
1835 case R_PPC_REL24:
1836 /* warning: must be at 32 MB distancy */
1837 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
1838 rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1839 break;
1840 default:
1841 error("unsupported powerpc relocation (%d)", type);
1842 }
1843 }
1844 }
1845 #elif defined(CONFIG_FORMAT_MACH)
1846 struct scattered_relocation_info *scarel;
1847 struct relocation_info * rel;
1848 char final_sym_name[256];
1849 const char *sym_name;
1850 const char *p;
1851 int slide, sslide;
1852 int i;
1853
1854 for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1855 unsigned int offset, length, value = 0;
1856 unsigned int type, pcrel, isym = 0;
1857 unsigned int usesym = 0;
1858
1859 if(R_SCATTERED & rel->r_address) {
1860 scarel = (struct scattered_relocation_info*)rel;
1861 offset = (unsigned int)scarel->r_address;
1862 length = scarel->r_length;
1863 pcrel = scarel->r_pcrel;
1864 type = scarel->r_type;
1865 value = scarel->r_value;
1866 } else {
1867 value = isym = rel->r_symbolnum;
1868 usesym = (rel->r_extern);
1869 offset = rel->r_address;
1870 length = rel->r_length;
1871 pcrel = rel->r_pcrel;
1872 type = rel->r_type;
1873 }
1874
1875 slide = offset - start_offset;
1876
1877 if (!(offset >= start_offset && offset < start_offset + size))
1878 continue; /* not in our range */
1879
1880 sym_name = get_reloc_name(rel, &sslide);
1881
1882 if(usesym && symtab[isym].n_type & N_STAB)
1883 continue; /* don't handle STAB (debug sym) */
1884
1885 if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
1886 int n;
1887 n = strtol(p, NULL, 10);
1888 fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1889 n, slide);
1890 continue; /* Nothing more to do */
1891 }
1892
1893 if(!sym_name)
1894 {
1895 fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
1896 name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
1897 continue; /* dunno how to handle without final_sym_name */
1898 }
1899
1900 get_reloc_expr(final_sym_name, sizeof(final_sym_name),
1901 sym_name);
1902 switch(type) {
1903 case PPC_RELOC_BR24:
1904 if (!strstart(sym_name,"__op_gen_label",&p)) {
1905 fprintf(outfile, "{\n");
1906 fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
1907 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
1908 slide, slide, name, sslide );
1909 fprintf(outfile, "}\n");
1910 } else {
1911 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
1912 slide, slide, final_sym_name, slide);
1913 }
1914 break;
1915 case PPC_RELOC_HI16:
1916 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
1917 slide, final_sym_name, sslide);
1918 break;
1919 case PPC_RELOC_LO16:
1920 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
1921 slide, final_sym_name, sslide);
1922 break;
1923 case PPC_RELOC_HA16:
1924 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
1925 slide, final_sym_name, sslide);
1926 break;
1927 default:
1928 error("unsupported powerpc relocation (%d)", type);
1929 }
1930 }
1931 #else
1932 #error unsupport object format
1933 #endif
1934 }
1935 #elif defined(HOST_S390)
1936 {
1937 char name[256];
1938 int type;
1939 int addend;
1940 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1941 if (rel->r_offset >= start_offset &&
1942 rel->r_offset < start_offset + copy_size) {
1943 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1944 get_reloc_expr(name, sizeof(name), sym_name);
1945 type = ELF32_R_TYPE(rel->r_info);
1946 addend = rel->r_addend;
1947 switch(type) {
1948 case R_390_32:
1949 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1950 rel->r_offset - start_offset, name, addend);
1951 break;
1952 case R_390_16:
1953 fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
1954 rel->r_offset - start_offset, name, addend);
1955 break;
1956 case R_390_8:
1957 fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
1958 rel->r_offset - start_offset, name, addend);
1959 break;
1960 default:
1961 error("unsupported s390 relocation (%d)", type);
1962 }
1963 }
1964 }
1965 }
1966 #elif defined(HOST_ALPHA)
1967 {
1968 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1969 if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
1970 int type;
1971
1972 type = ELF64_R_TYPE(rel->r_info);
1973 sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
1974 switch (type) {
1975 case R_ALPHA_GPDISP:
1976 /* The gp is just 32 bit, and never changes, so it's easiest to emit it
1977 as an immediate instead of constructing it from the pv or ra. */
1978 fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
1979 rel->r_offset - start_offset);
1980 fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
1981 rel->r_offset - start_offset + rel->r_addend);
1982 break;
1983 case R_ALPHA_LITUSE:
1984 /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
1985 now, since some called functions (libc) need pv to be set up. */
1986 break;
1987 case R_ALPHA_HINT:
1988 /* Branch target prediction hint. Ignore for now. Should be already
1989 correct for in-function jumps. */
1990 break;
1991 case R_ALPHA_LITERAL:
1992 /* Load a literal from the GOT relative to the gp. Since there's only a
1993 single gp, nothing is to be done. */
1994 break;
1995 case R_ALPHA_GPRELHIGH:
1996 /* Handle fake relocations against __op_param symbol. Need to emit the
1997 high part of the immediate value instead. Other symbols need no
1998 special treatment. */
1999 if (strstart(sym_name, "__op_param", &p))
2000 fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2001 rel->r_offset - start_offset, p);
2002 break;
2003 case R_ALPHA_GPRELLOW:
2004 if (strstart(sym_name, "__op_param", &p))
2005 fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
2006 rel->r_offset - start_offset, p);
2007 break;
2008 case R_ALPHA_BRSGP:
2009 /* PC-relative jump. Tweak offset to skip the two instructions that try to
2010 set up the gp from the pv. */
2011 fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2012 rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
2013 break;
2014 default:
2015 error("unsupported Alpha relocation (%d)", type);
2016 }
2017 }
2018 }
2019 }
2020 #elif defined(HOST_IA64)
2021 {
2022 unsigned long sym_idx;
2023 long code_offset;
2024 char name[256];
2025 int type;
2026 long addend;
2027
2028 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2029 sym_idx = ELF64_R_SYM(rel->r_info);
2030 if (rel->r_offset < start_offset
2031 || rel->r_offset >= start_offset + copy_size)
2032 continue;
2033 sym_name = (strtab + symtab[sym_idx].st_name);
2034 if (strstart(sym_name, "__op_jmp", &p)) {
2035 int n;
2036 n = strtol(p, NULL, 10);
2037 /* __op_jmp relocations are done at
2038 runtime to do translated block
2039 chaining: the offset of the instruction
2040 needs to be stored */
2041 fprintf(outfile, " jmp_offsets[%d] ="
2042 "%ld + (gen_code_ptr - gen_code_buf);\n",
2043 n, rel->r_offset - start_offset);
2044 continue;
2045 }
2046 get_reloc_expr(name, sizeof(name), sym_name);
2047 type = ELF64_R_TYPE(rel->r_info);
2048 addend = rel->r_addend;
2049 code_offset = rel->r_offset - start_offset;
2050 switch(type) {
2051 case R_IA64_IMM64:
2052 fprintf(outfile,
2053 " ia64_imm64(gen_code_ptr + %ld, "
2054 "%s + %ld);\n",
2055 code_offset, name, addend);
2056 break;
2057 case R_IA64_LTOFF22X:
2058 case R_IA64_LTOFF22:
2059 fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
2060 " %s + %ld, %d);\n",
2061 code_offset, name, addend,
2062 (type == R_IA64_LTOFF22X));
2063 break;
2064 case R_IA64_LDXMOV:
2065 fprintf(outfile,
2066 " ia64_ldxmov(gen_code_ptr + %ld,"
2067 " %s + %ld);\n", code_offset, name, addend);
2068 break;
2069
2070 case R_IA64_PCREL21B:
2071 if (strstart(sym_name, "__op_gen_label", NULL)) {
2072 fprintf(outfile,
2073 " ia64_imm21b(gen_code_ptr + %ld,"
2074 " (long) (%s + %ld -\n\t\t"
2075 "((long) gen_code_ptr + %ld)) >> 4);\n",
2076 code_offset, name, addend,
2077 code_offset & ~0xfUL);
2078 } else {
2079 fprintf(outfile,
2080 " IA64_PLT(gen_code_ptr + %ld, "
2081 "%d);\t/* %s + %ld */\n",
2082 code_offset,
2083 get_plt_index(sym_name, addend),
2084 sym_name, addend);
2085 }
2086 break;
2087 default:
2088 error("unsupported ia64 relocation (0x%x)",
2089 type);
2090 }
2091 }
2092 fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n",
2093 copy_size - 16 + 2);
2094 }
2095 #elif defined(HOST_SPARC)
2096 {
2097 char name[256];
2098 int type;
2099 int addend;
2100 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2101 if (rel->r_offset >= start_offset &&
2102 rel->r_offset < start_offset + copy_size) {
2103 sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2104 get_reloc_expr(name, sizeof(name), sym_name);
2105 type = ELF32_R_TYPE(rel->r_info);
2106 addend = rel->r_addend;
2107 switch(type) {
2108 case R_SPARC_32:
2109 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2110 rel->r_offset - start_offset, name, addend);
2111 break;
2112 case R_SPARC_HI22:
2113 fprintf(outfile,
2114 " *(uint32_t *)(gen_code_ptr + %d) = "
2115 "((*(uint32_t *)(gen_code_ptr + %d)) "
2116 " & ~0x3fffff) "
2117 " | (((%s + %d) >> 10) & 0x3fffff);\n",
2118 rel->r_offset - start_offset,
2119 rel->r_offset - start_offset,
2120 name, addend);
2121 break;
2122 case R_SPARC_LO10:
2123 fprintf(outfile,
2124 " *(uint32_t *)(gen_code_ptr + %d) = "
2125 "((*(uint32_t *)(gen_code_ptr + %d)) "
2126 " & ~0x3ff) "
2127 " | ((%s + %d) & 0x3ff);\n",
2128 rel->r_offset - start_offset,
2129 rel->r_offset - start_offset,
2130 name, addend);
2131 break;
2132 case R_SPARC_WDISP30:
2133 fprintf(outfile,
2134 " *(uint32_t *)(gen_code_ptr + %d) = "
2135 "((*(uint32_t *)(gen_code_ptr + %d)) "
2136 " & ~0x3fffffff) "
2137 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2138 " & 0x3fffffff);\n",
2139 rel->r_offset - start_offset,
2140 rel->r_offset - start_offset,
2141 name, addend,
2142 rel->r_offset - start_offset);
2143 break;
2144 default:
2145 error("unsupported sparc relocation (%d)", type);
2146 }
2147 }
2148 }
2149 }
2150 #elif defined(HOST_SPARC64)
2151 {
2152 char name[256];
2153 int type;
2154 int addend;
2155 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2156 if (rel->r_offset >= start_offset &&
2157 rel->r_offset < start_offset + copy_size) {
2158 sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2159 get_reloc_expr(name, sizeof(name), sym_name);
2160 type = ELF64_R_TYPE(rel->r_info);
2161 addend = rel->r_addend;
2162 switch(type) {
2163 case R_SPARC_32:
2164 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2165 rel->r_offset - start_offset, name, addend);
2166 break;
2167 case R_SPARC_HI22:
2168 fprintf(outfile,
2169 " *(uint32_t *)(gen_code_ptr + %d) = "
2170 "((*(uint32_t *)(gen_code_ptr + %d)) "
2171 " & ~0x3fffff) "
2172 " | (((%s + %d) >> 10) & 0x3fffff);\n",
2173 rel->r_offset - start_offset,
2174 rel->r_offset - start_offset,
2175 name, addend);
2176 break;
2177 case R_SPARC_LO10:
2178 fprintf(outfile,
2179 " *(uint32_t *)(gen_code_ptr + %d) = "
2180 "((*(uint32_t *)(gen_code_ptr + %d)) "
2181 " & ~0x3ff) "
2182 " | ((%s + %d) & 0x3ff);\n",
2183 rel->r_offset - start_offset,
2184 rel->r_offset - start_offset,
2185 name, addend);
2186 break;
2187 case R_SPARC_WDISP30:
2188 fprintf(outfile,
2189 " *(uint32_t *)(gen_code_ptr + %d) = "
2190 "((*(uint32_t *)(gen_code_ptr + %d)) "
2191 " & ~0x3fffffff) "
2192 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2193 " & 0x3fffffff);\n",
2194 rel->r_offset - start_offset,
2195 rel->r_offset - start_offset,
2196 name, addend,
2197 rel->r_offset - start_offset);
2198 break;
2199 default:
2200 error("unsupported sparc64 relocation (%d)", type);
2201 }
2202 }
2203 }
2204 }
2205 #elif defined(HOST_ARM)
2206 {
2207 char name[256];
2208 int type;
2209 int addend;
2210
2211 arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
2212 relocs, nb_relocs);
2213
2214 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2215 if (rel->r_offset >= start_offset &&
2216 rel->r_offset < start_offset + copy_size) {
2217 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2218 /* the compiler leave some unnecessary references to the code */
2219 if (sym_name[0] == '\0')
2220 continue;
2221 get_reloc_expr(name, sizeof(name), sym_name);
2222 type = ELF32_R_TYPE(rel->r_info);
2223 addend = get32((uint32_t *)(text + rel->r_offset));
2224 switch(type) {
2225 case R_ARM_ABS32:
2226 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2227 rel->r_offset - start_offset, name, addend);
2228 break;
2229 case R_ARM_PC24:
2230 fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
2231 rel->r_offset - start_offset, addend, name);
2232 break;
2233 default:
2234 error("unsupported arm relocation (%d)", type);
2235 }
2236 }
2237 }
2238 }
2239 #elif defined(HOST_M68K)
2240 {
2241 char name[256];
2242 int type;
2243 int addend;
2244 Elf32_Sym *sym;
2245 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2246 if (rel->r_offset >= start_offset &&
2247 rel->r_offset < start_offset + copy_size) {
2248 sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2249 sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2250 get_reloc_expr(name, sizeof(name), sym_name);
2251 type = ELF32_R_TYPE(rel->r_info);
2252 addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2253 switch(type) {
2254 case R_68K_32:
2255 fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2256 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
2257 rel->r_offset - start_offset, name, addend );
2258 break;
2259 case R_68K_PC32:
2260 fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2261 fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2262 rel->r_offset - start_offset, name, rel->r_offset - start_offset, /*sym->st_value+*/ addend);
2263 break;
2264 default:
2265 error("unsupported m68k relocation (%d)", type);
2266 }
2267 }
2268 }
2269 }
2270 #else
2271 #error unsupported CPU
2272 #endif
2273 fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
2274 fprintf(outfile, "}\n");
2275 fprintf(outfile, "break;\n\n");
2276 } else {
2277 fprintf(outfile, "static inline void gen_%s(", name);
2278 if (nb_args == 0) {
2279 fprintf(outfile, "void");
2280 } else {
2281 for(i = 0; i < nb_args; i++) {
2282 if (i != 0)
2283 fprintf(outfile, ", ");
2284 fprintf(outfile, "long param%d", i + 1);
2285 }
2286 }
2287 fprintf(outfile, ")\n");
2288 fprintf(outfile, "{\n");
2289 for(i = 0; i < nb_args; i++) {
2290 fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1);
2291 }
2292 fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
2293 fprintf(outfile, "}\n\n");
2294 }
2295 }
2296
2297 int gen_file(FILE *outfile, int out_type)
2298 {
2299 int i;
2300 EXE_SYM *sym;
2301
2302 if (out_type == OUT_INDEX_OP) {
2303 fprintf(outfile, "DEF(end, 0, 0)\n");
2304 fprintf(outfile, "DEF(nop, 0, 0)\n");
2305 fprintf(outfile, "DEF(nop1, 1, 0)\n");
2306 fprintf(outfile, "DEF(nop2, 2, 0)\n");
2307 fprintf(outfile, "DEF(nop3, 3, 0)\n");
2308 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2309 const char *name;
2310 name = get_sym_name(sym);
2311 if (strstart(name, OP_PREFIX, NULL)) {
2312 gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2313 }
2314 }
2315 } else if (out_type == OUT_GEN_OP) {
2316 /* generate gen_xxx functions */
2317 fprintf(outfile, "#include \"dyngen-op.h\"\n");
2318 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2319 const char *name;
2320 name = get_sym_name(sym);
2321 if (strstart(name, OP_PREFIX, NULL)) {
2322 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2323 if (sym->st_shndx != text_shndx)
2324 error("invalid section for opcode (0x%x)", sym->st_shndx);
2325 #endif
2326 gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2327 }
2328 }
2329
2330 } else {
2331 /* generate big code generation switch */
2332 fprintf(outfile,
2333 "int dyngen_code(uint8_t *gen_code_buf,\n"
2334 " uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
2335 " const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
2336 "{\n"
2337 " uint8_t *gen_code_ptr;\n"
2338 " const uint16_t *opc_ptr;\n"
2339 " const uint32_t *opparam_ptr;\n");
2340
2341 #ifdef HOST_ARM
2342 fprintf(outfile,
2343 " uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2344 " LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2345 " uint32_t *arm_data_ptr = arm_data_table;\n");
2346 #endif
2347 #ifdef HOST_IA64
2348 {
2349 long addend, not_first = 0;
2350 unsigned long sym_idx;
2351 int index, max_index;
2352 const char *sym_name;
2353 EXE_RELOC *rel;
2354
2355 max_index = -1;
2356 for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2357 sym_idx = ELF64_R_SYM(rel->r_info);
2358 sym_name = (strtab + symtab[sym_idx].st_name);
2359 if (strstart(sym_name, "__op_gen_label", NULL))
2360 continue;
2361 if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2362 continue;
2363
2364 addend = rel->r_addend;
2365 index = get_plt_index(sym_name, addend);
2366 if (index <= max_index)
2367 continue;
2368 max_index = index;
2369 fprintf(outfile, " extern void %s(void);\n", sym_name);
2370 }
2371
2372 fprintf(outfile,
2373 " struct ia64_fixup *plt_fixes = NULL, "
2374 "*ltoff_fixes = NULL;\n"
2375 " static long plt_target[] = {\n\t");
2376
2377 max_index = -1;
2378 for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2379 sym_idx = ELF64_R_SYM(rel->r_info);
2380 sym_name = (strtab + symtab[sym_idx].st_name);
2381 if (strstart(sym_name, "__op_gen_label", NULL))
2382 continue;
2383 if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2384 continue;
2385
2386 addend = rel->r_addend;
2387 index = get_plt_index(sym_name, addend);
2388 if (index <= max_index)
2389 continue;
2390 max_index = index;
2391
2392 if (not_first)
2393 fprintf(outfile, ",\n\t");
2394 not_first = 1;
2395 if (addend)
2396 fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
2397 else
2398 fprintf(outfile, "(long) &%s", sym_name);
2399 }
2400 fprintf(outfile, "\n };\n"
2401 " unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
2402 }
2403 #endif
2404
2405 fprintf(outfile,
2406 "\n"
2407 " gen_code_ptr = gen_code_buf;\n"
2408 " opc_ptr = opc_buf;\n"
2409 " opparam_ptr = opparam_buf;\n");
2410
2411 /* Generate prologue, if needed. */
2412
2413 fprintf(outfile,
2414 " for(;;) {\n"
2415 " switch(*opc_ptr++) {\n"
2416 );
2417
2418 for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2419 const char *name;
2420 name = get_sym_name(sym);
2421 if (strstart(name, OP_PREFIX, NULL)) {
2422 #if 0
2423 printf("%4d: %s pos=0x%08x len=%d\n",
2424 i, name, sym->st_value, sym->st_size);
2425 #endif
2426 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2427 if (sym->st_shndx != text_shndx)
2428 error("invalid section for opcode (0x%x)", sym->st_shndx);
2429 #endif
2430 gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2431 }
2432 }
2433
2434 fprintf(outfile,
2435 " case INDEX_op_nop:\n"
2436 " break;\n"
2437 " case INDEX_op_nop1:\n"
2438 " opparam_ptr++;\n"
2439 " break;\n"
2440 " case INDEX_op_nop2:\n"
2441 " opparam_ptr += 2;\n"
2442 " break;\n"
2443 " case INDEX_op_nop3:\n"
2444 " opparam_ptr += 3;\n"
2445 " break;\n"
2446 " default:\n"
2447 " goto the_end;\n"
2448 " }\n");
2449
2450 #ifdef HOST_ARM
2451 /* generate constant table if needed */
2452 fprintf(outfile,
2453 " if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
2454 " gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
2455 " last_gen_code_ptr = gen_code_ptr;\n"
2456 " arm_ldr_ptr = arm_ldr_table;\n"
2457 " arm_data_ptr = arm_data_table;\n"
2458 " }\n");
2459 #endif
2460
2461
2462 fprintf(outfile,
2463 " }\n"
2464 " the_end:\n"
2465 );
2466 #ifdef HOST_IA64
2467 fprintf(outfile,
2468 " ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
2469 "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
2470 "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
2471 "plt_target, plt_offset);\n");
2472 #endif
2473
2474 /* generate some code patching */
2475 #ifdef HOST_ARM
2476 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");
2477 #endif
2478 /* flush instruction cache */
2479 fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
2480
2481 fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
2482 fprintf(outfile, "}\n\n");
2483
2484 }
2485
2486 return 0;
2487 }
2488
2489 void usage(void)
2490 {
2491 printf("dyngen (c) 2003 Fabrice Bellard\n"
2492 "usage: dyngen [-o outfile] [-c] objfile\n"
2493 "Generate a dynamic code generator from an object file\n"
2494 "-c output enum of operations\n"
2495 "-g output gen_op_xx() functions\n"
2496 );
2497 exit(1);
2498 }
2499
2500 int main(int argc, char **argv)
2501 {
2502 int c, out_type;
2503 const char *filename, *outfilename;
2504 FILE *outfile;
2505
2506 outfilename = "out.c";
2507 out_type = OUT_CODE;
2508 for(;;) {
2509 c = getopt(argc, argv, "ho:cg");
2510 if (c == -1)
2511 break;
2512 switch(c) {
2513 case 'h':
2514 usage();
2515 break;
2516 case 'o':
2517 outfilename = optarg;
2518 break;
2519 case 'c':
2520 out_type = OUT_INDEX_OP;
2521 break;
2522 case 'g':
2523 out_type = OUT_GEN_OP;
2524 break;
2525 }
2526 }
2527 if (optind >= argc)
2528 usage();
2529 filename = argv[optind];
2530 outfile = fopen(outfilename, "w");
2531 if (!outfile)
2532 error("could not open '%s'", outfilename);
2533
2534 load_object(filename);
2535 gen_file(outfile, out_type);
2536 fclose(outfile);
2537 return 0;
2538 }
Qemu copy for testing