root / dyngen.c @ 298e01b6
History | View | Annotate | Download (95.4 kB)
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 |
#elif defined(HOST_MIPS)
|
121 |
|
122 |
#define ELF_CLASS ELFCLASS32
|
123 |
#define ELF_ARCH EM_MIPS
|
124 |
#define elf_check_arch(x) ((x) == EM_MIPS)
|
125 |
#define ELF_USES_RELOC
|
126 |
|
127 |
#elif defined(HOST_MIPS64)
|
128 |
|
129 |
/* Assume n32 ABI here, which is ELF32. */
|
130 |
#define ELF_CLASS ELFCLASS32
|
131 |
#define ELF_ARCH EM_MIPS
|
132 |
#define elf_check_arch(x) ((x) == EM_MIPS)
|
133 |
#define ELF_USES_RELOCA
|
134 |
|
135 |
#else
|
136 |
#error unsupported CPU - please update the code
|
137 |
#endif
|
138 |
|
139 |
#include "elf.h" |
140 |
|
141 |
#if ELF_CLASS == ELFCLASS32
|
142 |
typedef int32_t host_long;
|
143 |
typedef uint32_t host_ulong;
|
144 |
#define swabls(x) swab32s(x)
|
145 |
#define swablss(x) swab32ss(x)
|
146 |
#else
|
147 |
typedef int64_t host_long;
|
148 |
typedef uint64_t host_ulong;
|
149 |
#define swabls(x) swab64s(x)
|
150 |
#define swablss(x) swab64ss(x)
|
151 |
#endif
|
152 |
|
153 |
#ifdef ELF_USES_RELOCA
|
154 |
#define SHT_RELOC SHT_RELA
|
155 |
#else
|
156 |
#define SHT_RELOC SHT_REL
|
157 |
#endif
|
158 |
|
159 |
#define EXE_RELOC ELF_RELOC
|
160 |
#define EXE_SYM ElfW(Sym)
|
161 |
|
162 |
#endif /* CONFIG_FORMAT_ELF */ |
163 |
|
164 |
#ifdef CONFIG_FORMAT_COFF
|
165 |
|
166 |
typedef int32_t host_long;
|
167 |
typedef uint32_t host_ulong;
|
168 |
|
169 |
#include "a.out.h" |
170 |
|
171 |
#define FILENAMELEN 256 |
172 |
|
173 |
typedef struct coff_sym { |
174 |
struct external_syment *st_syment;
|
175 |
char st_name[FILENAMELEN];
|
176 |
uint32_t st_value; |
177 |
int st_size;
|
178 |
uint8_t st_type; |
179 |
uint8_t st_shndx; |
180 |
} coff_Sym; |
181 |
|
182 |
typedef struct coff_rel { |
183 |
struct external_reloc *r_reloc;
|
184 |
int r_offset;
|
185 |
uint8_t r_type; |
186 |
} coff_Rel; |
187 |
|
188 |
#define EXE_RELOC struct coff_rel |
189 |
#define EXE_SYM struct coff_sym |
190 |
|
191 |
#endif /* CONFIG_FORMAT_COFF */ |
192 |
|
193 |
#ifdef CONFIG_FORMAT_MACH
|
194 |
|
195 |
#include <mach-o/loader.h> |
196 |
#include <mach-o/nlist.h> |
197 |
#include <mach-o/reloc.h> |
198 |
#include <mach-o/ppc/reloc.h> |
199 |
|
200 |
# define check_mach_header(x) (x.magic == MH_MAGIC)
|
201 |
typedef int32_t host_long;
|
202 |
typedef uint32_t host_ulong;
|
203 |
|
204 |
struct nlist_extended
|
205 |
{ |
206 |
union {
|
207 |
char *n_name;
|
208 |
long n_strx;
|
209 |
} n_un; |
210 |
unsigned char n_type; |
211 |
unsigned char n_sect; |
212 |
short st_desc;
|
213 |
unsigned long st_value; |
214 |
unsigned long st_size; |
215 |
}; |
216 |
|
217 |
#define EXE_RELOC struct relocation_info |
218 |
#define EXE_SYM struct nlist_extended |
219 |
|
220 |
#endif /* CONFIG_FORMAT_MACH */ |
221 |
|
222 |
#include "bswap.h" |
223 |
|
224 |
enum {
|
225 |
OUT_GEN_OP, |
226 |
OUT_CODE, |
227 |
OUT_INDEX_OP, |
228 |
}; |
229 |
|
230 |
/* all dynamically generated functions begin with this code */
|
231 |
#define OP_PREFIX "op_" |
232 |
|
233 |
int do_swap;
|
234 |
|
235 |
static void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
236 |
{ |
237 |
va_list ap; |
238 |
va_start(ap, fmt); |
239 |
fprintf(stderr, "dyngen: ");
|
240 |
vfprintf(stderr, fmt, ap); |
241 |
fprintf(stderr, "\n");
|
242 |
va_end(ap); |
243 |
exit(1);
|
244 |
} |
245 |
|
246 |
static void *load_data(int fd, long offset, unsigned int size) |
247 |
{ |
248 |
char *data;
|
249 |
|
250 |
data = malloc(size); |
251 |
if (!data)
|
252 |
return NULL; |
253 |
lseek(fd, offset, SEEK_SET); |
254 |
if (read(fd, data, size) != size) {
|
255 |
free(data); |
256 |
return NULL; |
257 |
} |
258 |
return data;
|
259 |
} |
260 |
|
261 |
int strstart(const char *str, const char *val, const char **ptr) |
262 |
{ |
263 |
const char *p, *q; |
264 |
p = str; |
265 |
q = val; |
266 |
while (*q != '\0') { |
267 |
if (*p != *q)
|
268 |
return 0; |
269 |
p++; |
270 |
q++; |
271 |
} |
272 |
if (ptr)
|
273 |
*ptr = p; |
274 |
return 1; |
275 |
} |
276 |
|
277 |
void pstrcpy(char *buf, int buf_size, const char *str) |
278 |
{ |
279 |
int c;
|
280 |
char *q = buf;
|
281 |
|
282 |
if (buf_size <= 0) |
283 |
return;
|
284 |
|
285 |
for(;;) {
|
286 |
c = *str++; |
287 |
if (c == 0 || q >= buf + buf_size - 1) |
288 |
break;
|
289 |
*q++ = c; |
290 |
} |
291 |
*q = '\0';
|
292 |
} |
293 |
|
294 |
void swab16s(uint16_t *p)
|
295 |
{ |
296 |
*p = bswap16(*p); |
297 |
} |
298 |
|
299 |
void swab32s(uint32_t *p)
|
300 |
{ |
301 |
*p = bswap32(*p); |
302 |
} |
303 |
|
304 |
void swab32ss(int32_t *p)
|
305 |
{ |
306 |
*p = bswap32(*p); |
307 |
} |
308 |
|
309 |
void swab64s(uint64_t *p)
|
310 |
{ |
311 |
*p = bswap64(*p); |
312 |
} |
313 |
|
314 |
void swab64ss(int64_t *p)
|
315 |
{ |
316 |
*p = bswap64(*p); |
317 |
} |
318 |
|
319 |
uint16_t get16(uint16_t *p) |
320 |
{ |
321 |
uint16_t val; |
322 |
val = *p; |
323 |
if (do_swap)
|
324 |
val = bswap16(val); |
325 |
return val;
|
326 |
} |
327 |
|
328 |
uint32_t get32(uint32_t *p) |
329 |
{ |
330 |
uint32_t val; |
331 |
val = *p; |
332 |
if (do_swap)
|
333 |
val = bswap32(val); |
334 |
return val;
|
335 |
} |
336 |
|
337 |
void put16(uint16_t *p, uint16_t val)
|
338 |
{ |
339 |
if (do_swap)
|
340 |
val = bswap16(val); |
341 |
*p = val; |
342 |
} |
343 |
|
344 |
void put32(uint32_t *p, uint32_t val)
|
345 |
{ |
346 |
if (do_swap)
|
347 |
val = bswap32(val); |
348 |
*p = val; |
349 |
} |
350 |
|
351 |
/* executable information */
|
352 |
EXE_SYM *symtab; |
353 |
int nb_syms;
|
354 |
int text_shndx;
|
355 |
uint8_t *text; |
356 |
EXE_RELOC *relocs; |
357 |
int nb_relocs;
|
358 |
|
359 |
#ifdef CONFIG_FORMAT_ELF
|
360 |
|
361 |
/* ELF file info */
|
362 |
struct elf_shdr *shdr;
|
363 |
uint8_t **sdata; |
364 |
struct elfhdr ehdr;
|
365 |
char *strtab;
|
366 |
|
367 |
int elf_must_swap(struct elfhdr *h) |
368 |
{ |
369 |
union {
|
370 |
uint32_t i; |
371 |
uint8_t b[4];
|
372 |
} swaptest; |
373 |
|
374 |
swaptest.i = 1;
|
375 |
return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
|
376 |
(swaptest.b[0] == 0); |
377 |
} |
378 |
|
379 |
void elf_swap_ehdr(struct elfhdr *h) |
380 |
{ |
381 |
swab16s(&h->e_type); /* Object file type */
|
382 |
swab16s(&h-> e_machine); /* Architecture */
|
383 |
swab32s(&h-> e_version); /* Object file version */
|
384 |
swabls(&h-> e_entry); /* Entry point virtual address */
|
385 |
swabls(&h-> e_phoff); /* Program header table file offset */
|
386 |
swabls(&h-> e_shoff); /* Section header table file offset */
|
387 |
swab32s(&h-> e_flags); /* Processor-specific flags */
|
388 |
swab16s(&h-> e_ehsize); /* ELF header size in bytes */
|
389 |
swab16s(&h-> e_phentsize); /* Program header table entry size */
|
390 |
swab16s(&h-> e_phnum); /* Program header table entry count */
|
391 |
swab16s(&h-> e_shentsize); /* Section header table entry size */
|
392 |
swab16s(&h-> e_shnum); /* Section header table entry count */
|
393 |
swab16s(&h-> e_shstrndx); /* Section header string table index */
|
394 |
} |
395 |
|
396 |
void elf_swap_shdr(struct elf_shdr *h) |
397 |
{ |
398 |
swab32s(&h-> sh_name); /* Section name (string tbl index) */
|
399 |
swab32s(&h-> sh_type); /* Section type */
|
400 |
swabls(&h-> sh_flags); /* Section flags */
|
401 |
swabls(&h-> sh_addr); /* Section virtual addr at execution */
|
402 |
swabls(&h-> sh_offset); /* Section file offset */
|
403 |
swabls(&h-> sh_size); /* Section size in bytes */
|
404 |
swab32s(&h-> sh_link); /* Link to another section */
|
405 |
swab32s(&h-> sh_info); /* Additional section information */
|
406 |
swabls(&h-> sh_addralign); /* Section alignment */
|
407 |
swabls(&h-> sh_entsize); /* Entry size if section holds table */
|
408 |
} |
409 |
|
410 |
void elf_swap_phdr(struct elf_phdr *h) |
411 |
{ |
412 |
swab32s(&h->p_type); /* Segment type */
|
413 |
swabls(&h->p_offset); /* Segment file offset */
|
414 |
swabls(&h->p_vaddr); /* Segment virtual address */
|
415 |
swabls(&h->p_paddr); /* Segment physical address */
|
416 |
swabls(&h->p_filesz); /* Segment size in file */
|
417 |
swabls(&h->p_memsz); /* Segment size in memory */
|
418 |
swab32s(&h->p_flags); /* Segment flags */
|
419 |
swabls(&h->p_align); /* Segment alignment */
|
420 |
} |
421 |
|
422 |
void elf_swap_rel(ELF_RELOC *rel)
|
423 |
{ |
424 |
swabls(&rel->r_offset); |
425 |
swabls(&rel->r_info); |
426 |
#ifdef ELF_USES_RELOCA
|
427 |
swablss(&rel->r_addend); |
428 |
#endif
|
429 |
} |
430 |
|
431 |
struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
432 |
const char *name) |
433 |
{ |
434 |
int i;
|
435 |
const char *shname; |
436 |
struct elf_shdr *sec;
|
437 |
|
438 |
for(i = 0; i < shnum; i++) { |
439 |
sec = &shdr[i]; |
440 |
if (!sec->sh_name)
|
441 |
continue;
|
442 |
shname = shstr + sec->sh_name; |
443 |
if (!strcmp(shname, name))
|
444 |
return sec;
|
445 |
} |
446 |
return NULL; |
447 |
} |
448 |
|
449 |
int find_reloc(int sh_index) |
450 |
{ |
451 |
struct elf_shdr *sec;
|
452 |
int i;
|
453 |
|
454 |
for(i = 0; i < ehdr.e_shnum; i++) { |
455 |
sec = &shdr[i]; |
456 |
if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
|
457 |
return i;
|
458 |
} |
459 |
return 0; |
460 |
} |
461 |
|
462 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
463 |
{ |
464 |
return rel->r_offset;
|
465 |
} |
466 |
|
467 |
static char *get_rel_sym_name(EXE_RELOC *rel) |
468 |
{ |
469 |
return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
|
470 |
} |
471 |
|
472 |
static char *get_sym_name(EXE_SYM *sym) |
473 |
{ |
474 |
return strtab + sym->st_name;
|
475 |
} |
476 |
|
477 |
/* load an elf object file */
|
478 |
int load_object(const char *filename) |
479 |
{ |
480 |
int fd;
|
481 |
struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
|
482 |
int i, j;
|
483 |
ElfW(Sym) *sym; |
484 |
char *shstr;
|
485 |
ELF_RELOC *rel; |
486 |
|
487 |
fd = open(filename, O_RDONLY); |
488 |
if (fd < 0) |
489 |
error("can't open file '%s'", filename);
|
490 |
|
491 |
/* Read ELF header. */
|
492 |
if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
493 |
error("unable to read file header");
|
494 |
|
495 |
/* Check ELF identification. */
|
496 |
if (ehdr.e_ident[EI_MAG0] != ELFMAG0
|
497 |
|| ehdr.e_ident[EI_MAG1] != ELFMAG1 |
498 |
|| ehdr.e_ident[EI_MAG2] != ELFMAG2 |
499 |
|| ehdr.e_ident[EI_MAG3] != ELFMAG3 |
500 |
|| ehdr.e_ident[EI_VERSION] != EV_CURRENT) { |
501 |
error("bad ELF header");
|
502 |
} |
503 |
|
504 |
do_swap = elf_must_swap(&ehdr); |
505 |
if (do_swap)
|
506 |
elf_swap_ehdr(&ehdr); |
507 |
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
|
508 |
error("Unsupported ELF class");
|
509 |
if (ehdr.e_type != ET_REL)
|
510 |
error("ELF object file expected");
|
511 |
if (ehdr.e_version != EV_CURRENT)
|
512 |
error("Invalid ELF version");
|
513 |
if (!elf_check_arch(ehdr.e_machine))
|
514 |
error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
|
515 |
|
516 |
/* read section headers */
|
517 |
shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
518 |
if (do_swap) {
|
519 |
for(i = 0; i < ehdr.e_shnum; i++) { |
520 |
elf_swap_shdr(&shdr[i]); |
521 |
} |
522 |
} |
523 |
|
524 |
/* read all section data */
|
525 |
sdata = malloc(sizeof(void *) * ehdr.e_shnum); |
526 |
memset(sdata, 0, sizeof(void *) * ehdr.e_shnum); |
527 |
|
528 |
for(i = 0;i < ehdr.e_shnum; i++) { |
529 |
sec = &shdr[i]; |
530 |
if (sec->sh_type != SHT_NOBITS)
|
531 |
sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size); |
532 |
} |
533 |
|
534 |
sec = &shdr[ehdr.e_shstrndx]; |
535 |
shstr = (char *)sdata[ehdr.e_shstrndx];
|
536 |
|
537 |
/* swap relocations */
|
538 |
for(i = 0; i < ehdr.e_shnum; i++) { |
539 |
sec = &shdr[i]; |
540 |
if (sec->sh_type == SHT_RELOC) {
|
541 |
nb_relocs = sec->sh_size / sec->sh_entsize; |
542 |
if (do_swap) {
|
543 |
for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++) |
544 |
elf_swap_rel(rel); |
545 |
} |
546 |
} |
547 |
} |
548 |
/* text section */
|
549 |
|
550 |
text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
|
551 |
if (!text_sec)
|
552 |
error("could not find .text section");
|
553 |
text_shndx = text_sec - shdr; |
554 |
text = sdata[text_shndx]; |
555 |
|
556 |
/* find text relocations, if any */
|
557 |
relocs = NULL;
|
558 |
nb_relocs = 0;
|
559 |
i = find_reloc(text_shndx); |
560 |
if (i != 0) { |
561 |
relocs = (ELF_RELOC *)sdata[i]; |
562 |
nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize; |
563 |
} |
564 |
|
565 |
symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
|
566 |
if (!symtab_sec)
|
567 |
error("could not find .symtab section");
|
568 |
strtab_sec = &shdr[symtab_sec->sh_link]; |
569 |
|
570 |
symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr]; |
571 |
strtab = (char *)sdata[symtab_sec->sh_link];
|
572 |
|
573 |
nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
|
574 |
if (do_swap) {
|
575 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
576 |
swab32s(&sym->st_name); |
577 |
swabls(&sym->st_value); |
578 |
swabls(&sym->st_size); |
579 |
swab16s(&sym->st_shndx); |
580 |
} |
581 |
} |
582 |
close(fd); |
583 |
return 0; |
584 |
} |
585 |
|
586 |
#endif /* CONFIG_FORMAT_ELF */ |
587 |
|
588 |
#ifdef CONFIG_FORMAT_COFF
|
589 |
|
590 |
/* COFF file info */
|
591 |
struct external_scnhdr *shdr;
|
592 |
uint8_t **sdata; |
593 |
struct external_filehdr fhdr;
|
594 |
struct external_syment *coff_symtab;
|
595 |
char *strtab;
|
596 |
int coff_text_shndx, coff_data_shndx;
|
597 |
|
598 |
int data_shndx;
|
599 |
|
600 |
#define STRTAB_SIZE 4 |
601 |
|
602 |
#define DIR32 0x06 |
603 |
#define DISP32 0x14 |
604 |
|
605 |
#define T_FUNCTION 0x20 |
606 |
#define C_EXTERNAL 2 |
607 |
|
608 |
void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym) |
609 |
{ |
610 |
char *q;
|
611 |
int c, i, len;
|
612 |
|
613 |
if (ext_sym->e.e.e_zeroes != 0) { |
614 |
q = sym->st_name; |
615 |
for(i = 0; i < 8; i++) { |
616 |
c = ext_sym->e.e_name[i]; |
617 |
if (c == '\0') |
618 |
break;
|
619 |
*q++ = c; |
620 |
} |
621 |
*q = '\0';
|
622 |
} else {
|
623 |
pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
|
624 |
} |
625 |
|
626 |
/* now convert the name to a C name (suppress the leading '_') */
|
627 |
if (sym->st_name[0] == '_') { |
628 |
len = strlen(sym->st_name); |
629 |
memmove(sym->st_name, sym->st_name + 1, len - 1); |
630 |
sym->st_name[len - 1] = '\0'; |
631 |
} |
632 |
} |
633 |
|
634 |
char *name_for_dotdata(struct coff_rel *rel) |
635 |
{ |
636 |
int i;
|
637 |
struct coff_sym *sym;
|
638 |
uint32_t text_data; |
639 |
|
640 |
text_data = *(uint32_t *)(text + rel->r_offset); |
641 |
|
642 |
for (i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
643 |
if (sym->st_syment->e_scnum == data_shndx &&
|
644 |
text_data >= sym->st_value && |
645 |
text_data < sym->st_value + sym->st_size) { |
646 |
|
647 |
return sym->st_name;
|
648 |
|
649 |
} |
650 |
} |
651 |
return NULL; |
652 |
} |
653 |
|
654 |
static char *get_sym_name(EXE_SYM *sym) |
655 |
{ |
656 |
return sym->st_name;
|
657 |
} |
658 |
|
659 |
static char *get_rel_sym_name(EXE_RELOC *rel) |
660 |
{ |
661 |
char *name;
|
662 |
name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
663 |
if (!strcmp(name, ".data")) |
664 |
name = name_for_dotdata(rel); |
665 |
if (name[0] == '.') |
666 |
return NULL; |
667 |
return name;
|
668 |
} |
669 |
|
670 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
671 |
{ |
672 |
return rel->r_offset;
|
673 |
} |
674 |
|
675 |
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name) |
676 |
{ |
677 |
int i;
|
678 |
const char *shname; |
679 |
struct external_scnhdr *sec;
|
680 |
|
681 |
for(i = 0; i < shnum; i++) { |
682 |
sec = &shdr[i]; |
683 |
if (!sec->s_name)
|
684 |
continue;
|
685 |
shname = sec->s_name; |
686 |
if (!strcmp(shname, name))
|
687 |
return sec;
|
688 |
} |
689 |
return NULL; |
690 |
} |
691 |
|
692 |
/* load a coff object file */
|
693 |
int load_object(const char *filename) |
694 |
{ |
695 |
int fd;
|
696 |
struct external_scnhdr *sec, *text_sec, *data_sec;
|
697 |
int i;
|
698 |
struct external_syment *ext_sym;
|
699 |
struct external_reloc *coff_relocs;
|
700 |
struct external_reloc *ext_rel;
|
701 |
uint32_t *n_strtab; |
702 |
EXE_SYM *sym; |
703 |
EXE_RELOC *rel; |
704 |
const char *p; |
705 |
int aux_size, j;
|
706 |
|
707 |
fd = open(filename, O_RDONLY |
708 |
#ifdef _WIN32
|
709 |
| O_BINARY |
710 |
#endif
|
711 |
); |
712 |
if (fd < 0) |
713 |
error("can't open file '%s'", filename);
|
714 |
|
715 |
/* Read COFF header. */
|
716 |
if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr)) |
717 |
error("unable to read file header");
|
718 |
|
719 |
/* Check COFF identification. */
|
720 |
if (fhdr.f_magic != I386MAGIC) {
|
721 |
error("bad COFF header");
|
722 |
} |
723 |
do_swap = 0;
|
724 |
|
725 |
/* read section headers */
|
726 |
shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr)); |
727 |
|
728 |
/* read all section data */
|
729 |
sdata = malloc(sizeof(void *) * fhdr.f_nscns); |
730 |
memset(sdata, 0, sizeof(void *) * fhdr.f_nscns); |
731 |
|
732 |
for(i = 0;i < fhdr.f_nscns; i++) { |
733 |
sec = &shdr[i]; |
734 |
if (!strstart(sec->s_name, ".bss", &p)) |
735 |
sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size); |
736 |
} |
737 |
|
738 |
|
739 |
/* text section */
|
740 |
text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
|
741 |
if (!text_sec)
|
742 |
error("could not find .text section");
|
743 |
coff_text_shndx = text_sec - shdr; |
744 |
text = sdata[coff_text_shndx]; |
745 |
|
746 |
/* data section */
|
747 |
data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
|
748 |
if (!data_sec)
|
749 |
error("could not find .data section");
|
750 |
coff_data_shndx = data_sec - shdr; |
751 |
|
752 |
coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ); |
753 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
754 |
for(i=0;i<8;i++) |
755 |
printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
|
756 |
printf("\n");
|
757 |
} |
758 |
|
759 |
|
760 |
n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE); |
761 |
strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab); |
762 |
|
763 |
nb_syms = fhdr.f_nsyms; |
764 |
|
765 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
766 |
if (strstart(ext_sym->e.e_name, ".text", NULL)) |
767 |
text_shndx = ext_sym->e_scnum; |
768 |
if (strstart(ext_sym->e.e_name, ".data", NULL)) |
769 |
data_shndx = ext_sym->e_scnum; |
770 |
} |
771 |
|
772 |
/* set coff symbol */
|
773 |
symtab = malloc(sizeof(struct coff_sym) * nb_syms); |
774 |
|
775 |
for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) { |
776 |
memset(sym, 0, sizeof(*sym)); |
777 |
sym->st_syment = ext_sym; |
778 |
sym_ent_name(ext_sym, sym); |
779 |
sym->st_value = ext_sym->e_value; |
780 |
|
781 |
aux_size = *(int8_t *)ext_sym->e_numaux; |
782 |
if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
|
783 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
784 |
if ((ext_sym + j)->e_scnum == text_shndx &&
|
785 |
(ext_sym + j)->e_type == T_FUNCTION ){ |
786 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
787 |
break;
|
788 |
} else if (j == nb_syms - i - 1) { |
789 |
sec = &shdr[coff_text_shndx]; |
790 |
sym->st_size = sec->s_size - ext_sym->e_value; |
791 |
break;
|
792 |
} |
793 |
} |
794 |
} else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) { |
795 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
796 |
if ((ext_sym + j)->e_scnum == data_shndx) {
|
797 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
798 |
break;
|
799 |
} else if (j == nb_syms - i - 1) { |
800 |
sec = &shdr[coff_data_shndx]; |
801 |
sym->st_size = sec->s_size - ext_sym->e_value; |
802 |
break;
|
803 |
} |
804 |
} |
805 |
} else {
|
806 |
sym->st_size = 0;
|
807 |
} |
808 |
|
809 |
sym->st_type = ext_sym->e_type; |
810 |
sym->st_shndx = ext_sym->e_scnum; |
811 |
} |
812 |
|
813 |
|
814 |
/* find text relocations, if any */
|
815 |
sec = &shdr[coff_text_shndx]; |
816 |
coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ); |
817 |
nb_relocs = sec->s_nreloc; |
818 |
|
819 |
/* set coff relocation */
|
820 |
relocs = malloc(sizeof(struct coff_rel) * nb_relocs); |
821 |
for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs; |
822 |
i++, ext_rel++, rel++) { |
823 |
memset(rel, 0, sizeof(*rel)); |
824 |
rel->r_reloc = ext_rel; |
825 |
rel->r_offset = *(uint32_t *)ext_rel->r_vaddr; |
826 |
rel->r_type = *(uint16_t *)ext_rel->r_type; |
827 |
} |
828 |
return 0; |
829 |
} |
830 |
|
831 |
#endif /* CONFIG_FORMAT_COFF */ |
832 |
|
833 |
#ifdef CONFIG_FORMAT_MACH
|
834 |
|
835 |
/* File Header */
|
836 |
struct mach_header mach_hdr;
|
837 |
|
838 |
/* commands */
|
839 |
struct segment_command *segment = 0; |
840 |
struct dysymtab_command *dysymtabcmd = 0; |
841 |
struct symtab_command *symtabcmd = 0; |
842 |
|
843 |
/* section */
|
844 |
struct section *section_hdr;
|
845 |
struct section *text_sec_hdr;
|
846 |
uint8_t **sdata; |
847 |
|
848 |
/* relocs */
|
849 |
struct relocation_info *relocs;
|
850 |
|
851 |
/* symbols */
|
852 |
EXE_SYM *symtab; |
853 |
struct nlist *symtab_std;
|
854 |
char *strtab;
|
855 |
|
856 |
/* indirect symbols */
|
857 |
uint32_t *tocdylib; |
858 |
|
859 |
/* Utility functions */
|
860 |
|
861 |
static inline char *find_str_by_index(int index) |
862 |
{ |
863 |
return strtab+index;
|
864 |
} |
865 |
|
866 |
/* Used by dyngen common code */
|
867 |
static char *get_sym_name(EXE_SYM *sym) |
868 |
{ |
869 |
char *name = find_str_by_index(sym->n_un.n_strx);
|
870 |
|
871 |
if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */ |
872 |
return "debug"; |
873 |
|
874 |
if(!name)
|
875 |
return name;
|
876 |
if(name[0]=='_') |
877 |
return name + 1; |
878 |
else
|
879 |
return name;
|
880 |
} |
881 |
|
882 |
/* find a section index given its segname, sectname */
|
883 |
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname, |
884 |
const char *sectname) |
885 |
{ |
886 |
int i;
|
887 |
struct section *sec = section_hdr;
|
888 |
|
889 |
for(i = 0; i < shnum; i++, sec++) { |
890 |
if (!sec->segname || !sec->sectname)
|
891 |
continue;
|
892 |
if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
|
893 |
return i;
|
894 |
} |
895 |
return -1; |
896 |
} |
897 |
|
898 |
/* find a section header given its segname, sectname */
|
899 |
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname, |
900 |
const char *sectname) |
901 |
{ |
902 |
int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
|
903 |
if(index == -1) |
904 |
return NULL; |
905 |
return section_hdr+index;
|
906 |
} |
907 |
|
908 |
|
909 |
static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value) |
910 |
{ |
911 |
struct scattered_relocation_info * scarel;
|
912 |
|
913 |
if(R_SCATTERED & rel->r_address) {
|
914 |
scarel = (struct scattered_relocation_info*)rel;
|
915 |
if(scarel->r_type != PPC_RELOC_PAIR)
|
916 |
error("fetch_next_pair_value: looking for a pair which was not found (1)");
|
917 |
*value = scarel->r_value; |
918 |
} else {
|
919 |
if(rel->r_type != PPC_RELOC_PAIR)
|
920 |
error("fetch_next_pair_value: looking for a pair which was not found (2)");
|
921 |
*value = rel->r_address; |
922 |
} |
923 |
} |
924 |
|
925 |
/* find a sym name given its value, in a section number */
|
926 |
static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset ) |
927 |
{ |
928 |
int i, ret = -1; |
929 |
|
930 |
for( i = 0 ; i < nb_syms; i++ ) |
931 |
{ |
932 |
if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
|
933 |
(symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) ) |
934 |
{ |
935 |
if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) ) |
936 |
ret = i; |
937 |
} |
938 |
} |
939 |
if( ret < 0 ) { |
940 |
*offset = 0;
|
941 |
return 0; |
942 |
} else {
|
943 |
*offset = value - symtab[ret].st_value; |
944 |
return get_sym_name(&symtab[ret]);
|
945 |
} |
946 |
} |
947 |
|
948 |
/*
|
949 |
* Find symbol name given a (virtual) address, and a section which is of type
|
950 |
* S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
|
951 |
*/
|
952 |
static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr) |
953 |
{ |
954 |
unsigned int tocindex, symindex, size; |
955 |
const char *name = 0; |
956 |
|
957 |
/* Sanity check */
|
958 |
if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
|
959 |
return (char*)0; |
960 |
|
961 |
if( sec_hdr->flags & S_SYMBOL_STUBS ){
|
962 |
size = sec_hdr->reserved2; |
963 |
if(size == 0) |
964 |
error("size = 0");
|
965 |
|
966 |
} |
967 |
else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS || |
968 |
sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS) |
969 |
size = sizeof(unsigned long); |
970 |
else
|
971 |
return 0; |
972 |
|
973 |
/* Compute our index in toc */
|
974 |
tocindex = (address - sec_hdr->addr)/size; |
975 |
symindex = tocdylib[sec_hdr->reserved1 + tocindex]; |
976 |
|
977 |
name = get_sym_name(&symtab[symindex]); |
978 |
|
979 |
return name;
|
980 |
} |
981 |
|
982 |
static const char * find_reloc_name_given_its_address(int address) |
983 |
{ |
984 |
unsigned int i; |
985 |
for(i = 0; i < segment->nsects ; i++) |
986 |
{ |
987 |
const char * name = find_reloc_name_in_sec_ptr(address, §ion_hdr[i]); |
988 |
if((long)name != -1) |
989 |
return name;
|
990 |
} |
991 |
return 0; |
992 |
} |
993 |
|
994 |
static const char * get_reloc_name(EXE_RELOC * rel, int * sslide) |
995 |
{ |
996 |
char * name = 0; |
997 |
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
998 |
int sectnum = rel->r_symbolnum;
|
999 |
int sectoffset;
|
1000 |
int other_half=0; |
1001 |
|
1002 |
/* init the slide value */
|
1003 |
*sslide = 0;
|
1004 |
|
1005 |
if(R_SCATTERED & rel->r_address)
|
1006 |
return (char *)find_reloc_name_given_its_address(sca_rel->r_value); |
1007 |
|
1008 |
if(rel->r_extern)
|
1009 |
{ |
1010 |
/* ignore debug sym */
|
1011 |
if ( symtab[rel->r_symbolnum].n_type & N_STAB )
|
1012 |
return 0; |
1013 |
return get_sym_name(&symtab[rel->r_symbolnum]);
|
1014 |
} |
1015 |
|
1016 |
/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
|
1017 |
sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
|
1018 |
|
1019 |
if(sectnum==0xffffff) |
1020 |
return 0; |
1021 |
|
1022 |
/* Sanity Check */
|
1023 |
if(sectnum > segment->nsects)
|
1024 |
error("sectnum > segment->nsects");
|
1025 |
|
1026 |
switch(rel->r_type)
|
1027 |
{ |
1028 |
case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16); |
1029 |
break;
|
1030 |
case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff); |
1031 |
break;
|
1032 |
case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff); |
1033 |
break;
|
1034 |
case PPC_RELOC_BR24:
|
1035 |
sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
|
1036 |
if (sectoffset & 0x02000000) sectoffset |= 0xfc000000; |
1037 |
break;
|
1038 |
default:
|
1039 |
error("switch(rel->type) not found");
|
1040 |
} |
1041 |
|
1042 |
if(rel->r_pcrel)
|
1043 |
sectoffset += rel->r_address; |
1044 |
|
1045 |
if (rel->r_type == PPC_RELOC_BR24)
|
1046 |
name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_hdr[sectnum-1]); |
1047 |
|
1048 |
/* search it in the full symbol list, if not found */
|
1049 |
if(!name)
|
1050 |
name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
|
1051 |
|
1052 |
return name;
|
1053 |
} |
1054 |
|
1055 |
/* Used by dyngen common code */
|
1056 |
static const char * get_rel_sym_name(EXE_RELOC * rel) |
1057 |
{ |
1058 |
int sslide;
|
1059 |
return get_reloc_name( rel, &sslide);
|
1060 |
} |
1061 |
|
1062 |
/* Used by dyngen common code */
|
1063 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
1064 |
{ |
1065 |
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
1066 |
if(R_SCATTERED & rel->r_address)
|
1067 |
return sca_rel->r_address;
|
1068 |
else
|
1069 |
return rel->r_address;
|
1070 |
} |
1071 |
|
1072 |
/* load a mach-o object file */
|
1073 |
int load_object(const char *filename) |
1074 |
{ |
1075 |
int fd;
|
1076 |
unsigned int offset_to_segment = 0; |
1077 |
unsigned int offset_to_dysymtab = 0; |
1078 |
unsigned int offset_to_symtab = 0; |
1079 |
struct load_command lc;
|
1080 |
unsigned int i, j; |
1081 |
EXE_SYM *sym; |
1082 |
struct nlist *syment;
|
1083 |
|
1084 |
fd = open(filename, O_RDONLY); |
1085 |
if (fd < 0) |
1086 |
error("can't open file '%s'", filename);
|
1087 |
|
1088 |
/* Read Mach header. */
|
1089 |
if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) |
1090 |
error("unable to read file header");
|
1091 |
|
1092 |
/* Check Mach identification. */
|
1093 |
if (!check_mach_header(mach_hdr)) {
|
1094 |
error("bad Mach header");
|
1095 |
} |
1096 |
|
1097 |
if (mach_hdr.cputype != CPU_TYPE_POWERPC)
|
1098 |
error("Unsupported CPU");
|
1099 |
|
1100 |
if (mach_hdr.filetype != MH_OBJECT)
|
1101 |
error("Unsupported Mach Object");
|
1102 |
|
1103 |
/* read segment headers */
|
1104 |
for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++) |
1105 |
{ |
1106 |
if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command)) |
1107 |
error("unable to read load_command");
|
1108 |
if(lc.cmd == LC_SEGMENT)
|
1109 |
{ |
1110 |
offset_to_segment = j; |
1111 |
lseek(fd, offset_to_segment, SEEK_SET); |
1112 |
segment = malloc(sizeof(struct segment_command)); |
1113 |
if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command)) |
1114 |
error("unable to read LC_SEGMENT");
|
1115 |
} |
1116 |
if(lc.cmd == LC_DYSYMTAB)
|
1117 |
{ |
1118 |
offset_to_dysymtab = j; |
1119 |
lseek(fd, offset_to_dysymtab, SEEK_SET); |
1120 |
dysymtabcmd = malloc(sizeof(struct dysymtab_command)); |
1121 |
if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command)) |
1122 |
error("unable to read LC_DYSYMTAB");
|
1123 |
} |
1124 |
if(lc.cmd == LC_SYMTAB)
|
1125 |
{ |
1126 |
offset_to_symtab = j; |
1127 |
lseek(fd, offset_to_symtab, SEEK_SET); |
1128 |
symtabcmd = malloc(sizeof(struct symtab_command)); |
1129 |
if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command)) |
1130 |
error("unable to read LC_SYMTAB");
|
1131 |
} |
1132 |
j+=lc.cmdsize; |
1133 |
|
1134 |
lseek(fd, j, SEEK_SET); |
1135 |
} |
1136 |
|
1137 |
if(!segment)
|
1138 |
error("unable to find LC_SEGMENT");
|
1139 |
|
1140 |
/* read section headers */
|
1141 |
section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section)); |
1142 |
|
1143 |
/* read all section data */
|
1144 |
sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects); |
1145 |
memset(sdata, 0, sizeof(void *) * segment->nsects); |
1146 |
|
1147 |
/* Load the data in section data */
|
1148 |
for(i = 0; i < segment->nsects; i++) { |
1149 |
sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size); |
1150 |
} |
1151 |
|
1152 |
/* text section */
|
1153 |
text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
1154 |
i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
1155 |
if (i == -1 || !text_sec_hdr) |
1156 |
error("could not find __TEXT,__text section");
|
1157 |
text = sdata[i]; |
1158 |
|
1159 |
/* Make sure dysym was loaded */
|
1160 |
if(!(int)dysymtabcmd) |
1161 |
error("could not find __DYSYMTAB segment");
|
1162 |
|
1163 |
/* read the table of content of the indirect sym */
|
1164 |
tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
|
1165 |
|
1166 |
/* Make sure symtab was loaded */
|
1167 |
if(!(int)symtabcmd) |
1168 |
error("could not find __SYMTAB segment");
|
1169 |
nb_syms = symtabcmd->nsyms; |
1170 |
|
1171 |
symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist)); |
1172 |
strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize); |
1173 |
|
1174 |
symtab = malloc(sizeof(EXE_SYM) * nb_syms);
|
1175 |
|
1176 |
/* Now transform the symtab, to an extended version, with the sym size, and the C name */
|
1177 |
for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) { |
1178 |
struct nlist *sym_follow, *sym_next = 0; |
1179 |
unsigned int j; |
1180 |
memset(sym, 0, sizeof(*sym)); |
1181 |
|
1182 |
if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ |
1183 |
continue;
|
1184 |
|
1185 |
memcpy(sym, syment, sizeof(*syment));
|
1186 |
|
1187 |
/* Find the following symbol in order to get the current symbol size */
|
1188 |
for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) { |
1189 |
if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) |
1190 |
continue;
|
1191 |
if(!sym_next) {
|
1192 |
sym_next = sym_follow; |
1193 |
continue;
|
1194 |
} |
1195 |
if(!(sym_next->n_value > sym_follow->n_value))
|
1196 |
continue;
|
1197 |
sym_next = sym_follow; |
1198 |
} |
1199 |
if(sym_next)
|
1200 |
sym->st_size = sym_next->n_value - sym->st_value; |
1201 |
else
|
1202 |
sym->st_size = text_sec_hdr->size - sym->st_value; |
1203 |
} |
1204 |
|
1205 |
/* Find Reloc */
|
1206 |
relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info)); |
1207 |
nb_relocs = text_sec_hdr->nreloc; |
1208 |
|
1209 |
close(fd); |
1210 |
return 0; |
1211 |
} |
1212 |
|
1213 |
#endif /* CONFIG_FORMAT_MACH */ |
1214 |
|
1215 |
/* return true if the expression is a label reference */
|
1216 |
int get_reloc_expr(char *name, int name_size, const char *sym_name) |
1217 |
{ |
1218 |
const char *p; |
1219 |
|
1220 |
if (strstart(sym_name, "__op_param", &p)) { |
1221 |
snprintf(name, name_size, "param%s", p);
|
1222 |
} else if (strstart(sym_name, "__op_gen_label", &p)) { |
1223 |
snprintf(name, name_size, "param%s", p);
|
1224 |
return 1; |
1225 |
} else {
|
1226 |
#ifdef HOST_SPARC
|
1227 |
if (sym_name[0] == '.') |
1228 |
snprintf(name, name_size, |
1229 |
"(long)(&__dot_%s)",
|
1230 |
sym_name + 1);
|
1231 |
else
|
1232 |
#endif
|
1233 |
snprintf(name, name_size, "(long)(&%s)", sym_name);
|
1234 |
} |
1235 |
return 0; |
1236 |
} |
1237 |
|
1238 |
#ifdef HOST_IA64
|
1239 |
|
1240 |
#define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */ |
1241 |
|
1242 |
struct plt_entry {
|
1243 |
struct plt_entry *next;
|
1244 |
const char *name; |
1245 |
unsigned long addend; |
1246 |
} *plt_list; |
1247 |
|
1248 |
static int |
1249 |
get_plt_index (const char *name, unsigned long addend) |
1250 |
{ |
1251 |
struct plt_entry *plt, *prev= NULL; |
1252 |
int index = 0; |
1253 |
|
1254 |
/* see if we already have an entry for this target: */
|
1255 |
for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
|
1256 |
if (strcmp(plt->name, name) == 0 && plt->addend == addend) |
1257 |
return index;
|
1258 |
|
1259 |
/* nope; create a new PLT entry: */
|
1260 |
|
1261 |
plt = malloc(sizeof(*plt));
|
1262 |
if (!plt) {
|
1263 |
perror("malloc");
|
1264 |
exit(1);
|
1265 |
} |
1266 |
memset(plt, 0, sizeof(*plt)); |
1267 |
plt->name = strdup(name); |
1268 |
plt->addend = addend; |
1269 |
|
1270 |
/* append to plt-list: */
|
1271 |
if (prev)
|
1272 |
prev->next = plt; |
1273 |
else
|
1274 |
plt_list = plt; |
1275 |
return index;
|
1276 |
} |
1277 |
|
1278 |
#endif
|
1279 |
|
1280 |
#ifdef HOST_ARM
|
1281 |
|
1282 |
int arm_emit_ldr_info(const char *name, unsigned long start_offset, |
1283 |
FILE *outfile, uint8_t *p_start, uint8_t *p_end, |
1284 |
ELF_RELOC *relocs, int nb_relocs)
|
1285 |
{ |
1286 |
uint8_t *p; |
1287 |
uint32_t insn; |
1288 |
int offset, min_offset, pc_offset, data_size, spare, max_pool;
|
1289 |
uint8_t data_allocated[1024];
|
1290 |
unsigned int data_index; |
1291 |
int type;
|
1292 |
|
1293 |
memset(data_allocated, 0, sizeof(data_allocated)); |
1294 |
|
1295 |
p = p_start; |
1296 |
min_offset = p_end - p_start; |
1297 |
spare = 0x7fffffff;
|
1298 |
while (p < p_start + min_offset) {
|
1299 |
insn = get32((uint32_t *)p); |
1300 |
/* TODO: Armv5e ldrd. */
|
1301 |
/* TODO: VFP load. */
|
1302 |
if ((insn & 0x0d5f0000) == 0x051f0000) { |
1303 |
/* ldr reg, [pc, #im] */
|
1304 |
offset = insn & 0xfff;
|
1305 |
if (!(insn & 0x00800000)) |
1306 |
offset = -offset; |
1307 |
max_pool = 4096;
|
1308 |
type = 0;
|
1309 |
} else if ((insn & 0x0e5f0f00) == 0x0c1f0100) { |
1310 |
/* FPA ldf. */
|
1311 |
offset = (insn & 0xff) << 2; |
1312 |
if (!(insn & 0x00800000)) |
1313 |
offset = -offset; |
1314 |
max_pool = 1024;
|
1315 |
type = 1;
|
1316 |
} else if ((insn & 0x0fff0000) == 0x028f0000) { |
1317 |
/* Some gcc load a doubleword immediate with
|
1318 |
add regN, pc, #imm
|
1319 |
ldmia regN, {regN, regM}
|
1320 |
Hope and pray the compiler never generates somethin like
|
1321 |
add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
|
1322 |
int r;
|
1323 |
|
1324 |
r = (insn & 0xf00) >> 7; |
1325 |
offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r)); |
1326 |
max_pool = 1024;
|
1327 |
type = 2;
|
1328 |
} else {
|
1329 |
max_pool = 0;
|
1330 |
type = -1;
|
1331 |
} |
1332 |
if (type >= 0) { |
1333 |
/* PC-relative load needs fixing up. */
|
1334 |
if (spare > max_pool - offset)
|
1335 |
spare = max_pool - offset; |
1336 |
if ((offset & 3) !=0) |
1337 |
error("%s:%04x: pc offset must be 32 bit aligned",
|
1338 |
name, start_offset + p - p_start); |
1339 |
if (offset < 0) |
1340 |
error("%s:%04x: Embedded literal value",
|
1341 |
name, start_offset + p - p_start); |
1342 |
pc_offset = p - p_start + offset + 8;
|
1343 |
if (pc_offset <= (p - p_start) ||
|
1344 |
pc_offset >= (p_end - p_start)) |
1345 |
error("%s:%04x: pc offset must point inside the function code",
|
1346 |
name, start_offset + p - p_start); |
1347 |
if (pc_offset < min_offset)
|
1348 |
min_offset = pc_offset; |
1349 |
if (outfile) {
|
1350 |
/* The intruction position */
|
1351 |
fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
|
1352 |
p - p_start); |
1353 |
/* The position of the constant pool data. */
|
1354 |
data_index = ((p_end - p_start) - pc_offset) >> 2;
|
1355 |
fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
|
1356 |
data_index); |
1357 |
fprintf(outfile, " arm_ldr_ptr->type = %d;\n", type);
|
1358 |
fprintf(outfile, " arm_ldr_ptr++;\n");
|
1359 |
} |
1360 |
} |
1361 |
p += 4;
|
1362 |
} |
1363 |
|
1364 |
/* Copy and relocate the constant pool data. */
|
1365 |
data_size = (p_end - p_start) - min_offset; |
1366 |
if (data_size > 0 && outfile) { |
1367 |
spare += min_offset; |
1368 |
fprintf(outfile, " arm_data_ptr -= %d;\n", data_size >> 2); |
1369 |
fprintf(outfile, " arm_pool_ptr -= %d;\n", data_size);
|
1370 |
fprintf(outfile, " if (arm_pool_ptr > gen_code_ptr + %d)\n"
|
1371 |
" arm_pool_ptr = gen_code_ptr + %d;\n",
|
1372 |
spare, spare); |
1373 |
|
1374 |
data_index = 0;
|
1375 |
for (pc_offset = min_offset;
|
1376 |
pc_offset < p_end - p_start; |
1377 |
pc_offset += 4) {
|
1378 |
|
1379 |
ELF_RELOC *rel; |
1380 |
int i, addend, type;
|
1381 |
const char *sym_name; |
1382 |
char relname[1024]; |
1383 |
|
1384 |
/* data value */
|
1385 |
addend = get32((uint32_t *)(p_start + pc_offset)); |
1386 |
relname[0] = '\0'; |
1387 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1388 |
if (rel->r_offset == (pc_offset + start_offset)) {
|
1389 |
sym_name = get_rel_sym_name(rel); |
1390 |
/* the compiler leave some unnecessary references to the code */
|
1391 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
1392 |
type = ELF32_R_TYPE(rel->r_info); |
1393 |
if (type != R_ARM_ABS32)
|
1394 |
error("%s: unsupported data relocation", name);
|
1395 |
break;
|
1396 |
} |
1397 |
} |
1398 |
fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
|
1399 |
data_index, addend); |
1400 |
if (relname[0] != '\0') |
1401 |
fprintf(outfile, " + %s", relname);
|
1402 |
fprintf(outfile, ";\n");
|
1403 |
|
1404 |
data_index++; |
1405 |
} |
1406 |
} |
1407 |
|
1408 |
if (p == p_start)
|
1409 |
goto arm_ret_error;
|
1410 |
p -= 4;
|
1411 |
insn = get32((uint32_t *)p); |
1412 |
/* The last instruction must be an ldm instruction. There are several
|
1413 |
forms generated by gcc:
|
1414 |
ldmib sp, {..., pc} (implies a sp adjustment of +4)
|
1415 |
ldmia sp, {..., pc}
|
1416 |
ldmea fp, {..., pc} */
|
1417 |
if ((insn & 0xffff8000) == 0xe99d8000) { |
1418 |
if (outfile) {
|
1419 |
fprintf(outfile, |
1420 |
" *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
|
1421 |
p - p_start); |
1422 |
} |
1423 |
p += 4;
|
1424 |
} else if ((insn & 0xffff8000) != 0xe89d8000 |
1425 |
&& (insn & 0xffff8000) != 0xe91b8000) { |
1426 |
arm_ret_error:
|
1427 |
if (!outfile)
|
1428 |
printf("%s: invalid epilog\n", name);
|
1429 |
} |
1430 |
return p - p_start;
|
1431 |
} |
1432 |
#endif
|
1433 |
|
1434 |
|
1435 |
#define MAX_ARGS 3 |
1436 |
|
1437 |
/* generate op code */
|
1438 |
void gen_code(const char *name, host_ulong offset, host_ulong size, |
1439 |
FILE *outfile, int gen_switch)
|
1440 |
{ |
1441 |
int copy_size = 0; |
1442 |
uint8_t *p_start, *p_end; |
1443 |
host_ulong start_offset; |
1444 |
int nb_args, i, n;
|
1445 |
uint8_t args_present[MAX_ARGS]; |
1446 |
const char *sym_name, *p; |
1447 |
EXE_RELOC *rel; |
1448 |
|
1449 |
/* Compute exact size excluding prologue and epilogue instructions.
|
1450 |
* Increment start_offset to skip epilogue instructions, then compute
|
1451 |
* copy_size the indicate the size of the remaining instructions (in
|
1452 |
* bytes).
|
1453 |
*/
|
1454 |
p_start = text + offset; |
1455 |
p_end = p_start + size; |
1456 |
start_offset = offset; |
1457 |
#if defined(HOST_I386) || defined(HOST_X86_64)
|
1458 |
#ifdef CONFIG_FORMAT_COFF
|
1459 |
{ |
1460 |
uint8_t *p; |
1461 |
p = p_end - 1;
|
1462 |
if (p == p_start)
|
1463 |
error("empty code for %s", name);
|
1464 |
while (*p != 0xc3) { |
1465 |
p--; |
1466 |
if (p <= p_start)
|
1467 |
error("ret or jmp expected at the end of %s", name);
|
1468 |
} |
1469 |
copy_size = p - p_start; |
1470 |
} |
1471 |
#else
|
1472 |
{ |
1473 |
int len;
|
1474 |
len = p_end - p_start; |
1475 |
if (len == 0) |
1476 |
error("empty code for %s", name);
|
1477 |
if (p_end[-1] == 0xc3) { |
1478 |
len--; |
1479 |
} else {
|
1480 |
error("ret or jmp expected at the end of %s", name);
|
1481 |
} |
1482 |
copy_size = len; |
1483 |
} |
1484 |
#endif
|
1485 |
#elif defined(HOST_PPC)
|
1486 |
{ |
1487 |
uint8_t *p; |
1488 |
p = (void *)(p_end - 4); |
1489 |
if (p == p_start)
|
1490 |
error("empty code for %s", name);
|
1491 |
if (get32((uint32_t *)p) != 0x4e800020) |
1492 |
error("blr expected at the end of %s", name);
|
1493 |
copy_size = p - p_start; |
1494 |
} |
1495 |
#elif defined(HOST_S390)
|
1496 |
{ |
1497 |
uint8_t *p; |
1498 |
p = (void *)(p_end - 2); |
1499 |
if (p == p_start)
|
1500 |
error("empty code for %s", name);
|
1501 |
if ((get16((uint16_t *)p) & 0xfff0) != 0x07f0) |
1502 |
error("br expected at the end of %s", name);
|
1503 |
copy_size = p - p_start; |
1504 |
} |
1505 |
#elif defined(HOST_ALPHA)
|
1506 |
{ |
1507 |
uint8_t *p; |
1508 |
p = p_end - 4;
|
1509 |
#if 0
|
1510 |
/* XXX: check why it occurs */
|
1511 |
if (p == p_start)
|
1512 |
error("empty code for %s", name);
|
1513 |
#endif
|
1514 |
if (get32((uint32_t *)p) != 0x6bfa8001) |
1515 |
error("ret expected at the end of %s", name);
|
1516 |
copy_size = p - p_start; |
1517 |
} |
1518 |
#elif defined(HOST_IA64)
|
1519 |
{ |
1520 |
uint8_t *p; |
1521 |
p = (void *)(p_end - 4); |
1522 |
if (p == p_start)
|
1523 |
error("empty code for %s", name);
|
1524 |
/* br.ret.sptk.many b0;; */
|
1525 |
/* 08 00 84 00 */
|
1526 |
if (get32((uint32_t *)p) != 0x00840008) |
1527 |
error("br.ret.sptk.many b0;; expected at the end of %s", name);
|
1528 |
copy_size = p_end - p_start; |
1529 |
} |
1530 |
#elif defined(HOST_SPARC)
|
1531 |
{ |
1532 |
#define INSN_SAVE 0x9de3a000 |
1533 |
#define INSN_RET 0x81c7e008 |
1534 |
#define INSN_RETL 0x81c3e008 |
1535 |
#define INSN_RESTORE 0x81e80000 |
1536 |
#define INSN_RETURN 0x81cfe008 |
1537 |
#define INSN_NOP 0x01000000 |
1538 |
#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp |
1539 |
#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp |
1540 |
|
1541 |
uint32_t start_insn, end_insn1, end_insn2; |
1542 |
uint8_t *p; |
1543 |
p = (void *)(p_end - 8); |
1544 |
if (p <= p_start)
|
1545 |
error("empty code for %s", name);
|
1546 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
1547 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
1548 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
1549 |
if (((start_insn & ~0x1fff) == INSN_SAVE) || |
1550 |
(start_insn & ~0x1fff) == INSN_ADD_SP) {
|
1551 |
p_start += 0x4;
|
1552 |
start_offset += 0x4;
|
1553 |
if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
|
1554 |
/* SPARC v7: ret; restore; */ ;
|
1555 |
else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP) |
1556 |
/* SPARC v9: return; nop; */ ;
|
1557 |
else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP) |
1558 |
/* SPARC v7: retl; sub %sp, nn, %sp; */ ;
|
1559 |
else
|
1560 |
|
1561 |
error("ret; restore; not found at end of %s", name);
|
1562 |
} else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) { |
1563 |
; |
1564 |
} else {
|
1565 |
error("No save at the beginning of %s", name);
|
1566 |
} |
1567 |
#if 0
|
1568 |
/* Skip a preceeding nop, if present. */
|
1569 |
if (p > p_start) {
|
1570 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
1571 |
if (skip_insn == INSN_NOP)
|
1572 |
p -= 4;
|
1573 |
}
|
1574 |
#endif
|
1575 |
copy_size = p - p_start; |
1576 |
} |
1577 |
#elif defined(HOST_SPARC64)
|
1578 |
{ |
1579 |
#define INSN_SAVE 0x9de3a000 |
1580 |
#define INSN_RET 0x81c7e008 |
1581 |
#define INSN_RETL 0x81c3e008 |
1582 |
#define INSN_RESTORE 0x81e80000 |
1583 |
#define INSN_RETURN 0x81cfe008 |
1584 |
#define INSN_NOP 0x01000000 |
1585 |
#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp |
1586 |
#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp |
1587 |
|
1588 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
1589 |
uint8_t *p; |
1590 |
p = (void *)(p_end - 8); |
1591 |
#if 0
|
1592 |
/* XXX: check why it occurs */
|
1593 |
if (p <= p_start)
|
1594 |
error("empty code for %s", name);
|
1595 |
#endif
|
1596 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
1597 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
1598 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
1599 |
if (((start_insn & ~0x1fff) == INSN_SAVE) || |
1600 |
(start_insn & ~0x1fff) == INSN_ADD_SP) {
|
1601 |
p_start += 0x4;
|
1602 |
start_offset += 0x4;
|
1603 |
if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
|
1604 |
/* SPARC v7: ret; restore; */ ;
|
1605 |
else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP) |
1606 |
/* SPARC v9: return; nop; */ ;
|
1607 |
else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP) |
1608 |
/* SPARC v7: retl; sub %sp, nn, %sp; */ ;
|
1609 |
else
|
1610 |
|
1611 |
error("ret; restore; not found at end of %s", name);
|
1612 |
} else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) { |
1613 |
; |
1614 |
} else {
|
1615 |
error("No save at the beginning of %s", name);
|
1616 |
} |
1617 |
|
1618 |
#if 0
|
1619 |
/* Skip a preceeding nop, if present. */
|
1620 |
if (p > p_start) {
|
1621 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
1622 |
if (skip_insn == 0x01000000)
|
1623 |
p -= 4;
|
1624 |
}
|
1625 |
#endif
|
1626 |
|
1627 |
copy_size = p - p_start; |
1628 |
} |
1629 |
#elif defined(HOST_ARM)
|
1630 |
{ |
1631 |
uint32_t insn; |
1632 |
|
1633 |
if ((p_end - p_start) <= 16) |
1634 |
error("%s: function too small", name);
|
1635 |
if (get32((uint32_t *)p_start) != 0xe1a0c00d || |
1636 |
(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 || |
1637 |
get32((uint32_t *)(p_start + 8)) != 0xe24cb004) |
1638 |
error("%s: invalid prolog", name);
|
1639 |
p_start += 12;
|
1640 |
start_offset += 12;
|
1641 |
insn = get32((uint32_t *)p_start); |
1642 |
if ((insn & 0xffffff00) == 0xe24dd000) { |
1643 |
/* Stack adjustment. Assume op uses the frame pointer. */
|
1644 |
p_start -= 4;
|
1645 |
start_offset -= 4;
|
1646 |
} |
1647 |
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
|
1648 |
relocs, nb_relocs); |
1649 |
} |
1650 |
#elif defined(HOST_M68K)
|
1651 |
{ |
1652 |
uint8_t *p; |
1653 |
p = (void *)(p_end - 2); |
1654 |
if (p == p_start)
|
1655 |
error("empty code for %s", name);
|
1656 |
// remove NOP's, probably added for alignment
|
1657 |
while ((get16((uint16_t *)p) == 0x4e71) && |
1658 |
(p>p_start)) |
1659 |
p -= 2;
|
1660 |
if (get16((uint16_t *)p) != 0x4e75) |
1661 |
error("rts expected at the end of %s", name);
|
1662 |
copy_size = p - p_start; |
1663 |
} |
1664 |
#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
|
1665 |
{ |
1666 |
#define INSN_RETURN 0x03e00008 |
1667 |
#define INSN_NOP 0x00000000 |
1668 |
|
1669 |
uint8_t *p = p_end; |
1670 |
|
1671 |
if (p < (p_start + 0x8)) { |
1672 |
error("empty code for %s", name);
|
1673 |
} else {
|
1674 |
uint32_t end_insn1, end_insn2; |
1675 |
|
1676 |
p -= 0x8;
|
1677 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
1678 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
1679 |
if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP)
|
1680 |
error("jr ra not found at end of %s", name);
|
1681 |
} |
1682 |
copy_size = p - p_start; |
1683 |
} |
1684 |
#else
|
1685 |
#error unsupported CPU
|
1686 |
#endif
|
1687 |
|
1688 |
/* compute the number of arguments by looking at the relocations */
|
1689 |
for(i = 0;i < MAX_ARGS; i++) |
1690 |
args_present[i] = 0;
|
1691 |
|
1692 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1693 |
host_ulong offset = get_rel_offset(rel); |
1694 |
if (offset >= start_offset &&
|
1695 |
offset < start_offset + (p_end - p_start)) { |
1696 |
sym_name = get_rel_sym_name(rel); |
1697 |
if(!sym_name)
|
1698 |
continue;
|
1699 |
if (strstart(sym_name, "__op_param", &p) || |
1700 |
strstart(sym_name, "__op_gen_label", &p)) {
|
1701 |
n = strtoul(p, NULL, 10); |
1702 |
if (n > MAX_ARGS)
|
1703 |
error("too many arguments in %s", name);
|
1704 |
args_present[n - 1] = 1; |
1705 |
} |
1706 |
} |
1707 |
} |
1708 |
|
1709 |
nb_args = 0;
|
1710 |
while (nb_args < MAX_ARGS && args_present[nb_args])
|
1711 |
nb_args++; |
1712 |
for(i = nb_args; i < MAX_ARGS; i++) {
|
1713 |
if (args_present[i])
|
1714 |
error("inconsistent argument numbering in %s", name);
|
1715 |
} |
1716 |
|
1717 |
if (gen_switch == 2) { |
1718 |
fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size); |
1719 |
} else if (gen_switch == 1) { |
1720 |
|
1721 |
/* output C code */
|
1722 |
fprintf(outfile, "case INDEX_%s: {\n", name);
|
1723 |
if (nb_args > 0) { |
1724 |
fprintf(outfile, " long ");
|
1725 |
for(i = 0; i < nb_args; i++) { |
1726 |
if (i != 0) |
1727 |
fprintf(outfile, ", ");
|
1728 |
fprintf(outfile, "param%d", i + 1); |
1729 |
} |
1730 |
fprintf(outfile, ";\n");
|
1731 |
} |
1732 |
#if defined(HOST_IA64)
|
1733 |
fprintf(outfile, " extern char %s;\n", name);
|
1734 |
#else
|
1735 |
fprintf(outfile, " extern void %s();\n", name);
|
1736 |
#endif
|
1737 |
|
1738 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1739 |
host_ulong offset = get_rel_offset(rel); |
1740 |
if (offset >= start_offset &&
|
1741 |
offset < start_offset + (p_end - p_start)) { |
1742 |
sym_name = get_rel_sym_name(rel); |
1743 |
if(!sym_name)
|
1744 |
continue;
|
1745 |
if (*sym_name &&
|
1746 |
!strstart(sym_name, "__op_param", NULL) && |
1747 |
!strstart(sym_name, "__op_jmp", NULL) && |
1748 |
!strstart(sym_name, "__op_gen_label", NULL)) { |
1749 |
#if defined(HOST_SPARC)
|
1750 |
if (sym_name[0] == '.') { |
1751 |
fprintf(outfile, |
1752 |
"extern char __dot_%s __asm__(\"%s\");\n",
|
1753 |
sym_name+1, sym_name);
|
1754 |
continue;
|
1755 |
} |
1756 |
#endif
|
1757 |
#if defined(__APPLE__)
|
1758 |
/* Set __attribute((unused)) on darwin because we
|
1759 |
want to avoid warning when we don't use the symbol. */
|
1760 |
fprintf(outfile, " extern char %s __attribute__((unused));\n", sym_name);
|
1761 |
#elif defined(HOST_IA64)
|
1762 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
1763 |
/*
|
1764 |
* PCREL21 br.call targets generally
|
1765 |
* are out of range and need to go
|
1766 |
* through an "import stub".
|
1767 |
*/
|
1768 |
fprintf(outfile, " extern char %s;\n",
|
1769 |
sym_name); |
1770 |
#else
|
1771 |
fprintf(outfile, "extern char %s;\n", sym_name);
|
1772 |
#endif
|
1773 |
} |
1774 |
} |
1775 |
} |
1776 |
|
1777 |
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
|
1778 |
name, (int)(start_offset - offset), copy_size);
|
1779 |
|
1780 |
/* emit code offset information */
|
1781 |
{ |
1782 |
EXE_SYM *sym; |
1783 |
const char *sym_name, *p; |
1784 |
host_ulong val; |
1785 |
int n;
|
1786 |
|
1787 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1788 |
sym_name = get_sym_name(sym); |
1789 |
if (strstart(sym_name, "__op_label", &p)) { |
1790 |
uint8_t *ptr; |
1791 |
unsigned long offset; |
1792 |
|
1793 |
/* test if the variable refers to a label inside
|
1794 |
the code we are generating */
|
1795 |
#ifdef CONFIG_FORMAT_COFF
|
1796 |
if (sym->st_shndx == text_shndx) {
|
1797 |
ptr = sdata[coff_text_shndx]; |
1798 |
} else if (sym->st_shndx == data_shndx) { |
1799 |
ptr = sdata[coff_data_shndx]; |
1800 |
} else {
|
1801 |
ptr = NULL;
|
1802 |
} |
1803 |
#elif defined(CONFIG_FORMAT_MACH)
|
1804 |
if(!sym->n_sect)
|
1805 |
continue;
|
1806 |
ptr = sdata[sym->n_sect-1];
|
1807 |
#else
|
1808 |
ptr = sdata[sym->st_shndx]; |
1809 |
#endif
|
1810 |
if (!ptr)
|
1811 |
error("__op_labelN in invalid section");
|
1812 |
offset = sym->st_value; |
1813 |
#ifdef CONFIG_FORMAT_MACH
|
1814 |
offset -= section_hdr[sym->n_sect-1].addr;
|
1815 |
#endif
|
1816 |
val = *(host_ulong *)(ptr + offset); |
1817 |
#ifdef ELF_USES_RELOCA
|
1818 |
{ |
1819 |
int reloc_shndx, nb_relocs1, j;
|
1820 |
|
1821 |
/* try to find a matching relocation */
|
1822 |
reloc_shndx = find_reloc(sym->st_shndx); |
1823 |
if (reloc_shndx) {
|
1824 |
nb_relocs1 = shdr[reloc_shndx].sh_size / |
1825 |
shdr[reloc_shndx].sh_entsize; |
1826 |
rel = (ELF_RELOC *)sdata[reloc_shndx]; |
1827 |
for(j = 0; j < nb_relocs1; j++) { |
1828 |
if (rel->r_offset == offset) {
|
1829 |
val = rel->r_addend; |
1830 |
break;
|
1831 |
} |
1832 |
rel++; |
1833 |
} |
1834 |
} |
1835 |
} |
1836 |
#endif
|
1837 |
if (val >= start_offset && val <= start_offset + copy_size) {
|
1838 |
n = strtol(p, NULL, 10); |
1839 |
fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset)); |
1840 |
} |
1841 |
} |
1842 |
} |
1843 |
} |
1844 |
|
1845 |
/* load parameters in variables */
|
1846 |
for(i = 0; i < nb_args; i++) { |
1847 |
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
1848 |
} |
1849 |
|
1850 |
/* patch relocations */
|
1851 |
#if defined(HOST_I386)
|
1852 |
{ |
1853 |
char relname[256]; |
1854 |
int type, is_label;
|
1855 |
int addend;
|
1856 |
int reloc_offset;
|
1857 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1858 |
if (rel->r_offset >= start_offset &&
|
1859 |
rel->r_offset < start_offset + copy_size) { |
1860 |
sym_name = get_rel_sym_name(rel); |
1861 |
if (!sym_name)
|
1862 |
continue;
|
1863 |
reloc_offset = rel->r_offset - start_offset; |
1864 |
if (strstart(sym_name, "__op_jmp", &p)) { |
1865 |
int n;
|
1866 |
n = strtol(p, NULL, 10); |
1867 |
/* __op_jmp relocations are done at
|
1868 |
runtime to do translated block
|
1869 |
chaining: the offset of the instruction
|
1870 |
needs to be stored */
|
1871 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1872 |
n, reloc_offset); |
1873 |
continue;
|
1874 |
} |
1875 |
|
1876 |
is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
|
1877 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
1878 |
#ifdef CONFIG_FORMAT_ELF
|
1879 |
type = ELF32_R_TYPE(rel->r_info); |
1880 |
if (is_label) {
|
1881 |
switch(type) {
|
1882 |
case R_386_32:
|
1883 |
case R_386_PC32:
|
1884 |
fprintf(outfile, " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
|
1885 |
reloc_offset, type, relname, addend); |
1886 |
break;
|
1887 |
default:
|
1888 |
error("unsupported i386 relocation (%d)", type);
|
1889 |
} |
1890 |
} else {
|
1891 |
switch(type) {
|
1892 |
case R_386_32:
|
1893 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1894 |
reloc_offset, relname, addend); |
1895 |
break;
|
1896 |
case R_386_PC32:
|
1897 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1898 |
reloc_offset, relname, reloc_offset, addend); |
1899 |
break;
|
1900 |
default:
|
1901 |
error("unsupported i386 relocation (%d)", type);
|
1902 |
} |
1903 |
} |
1904 |
#elif defined(CONFIG_FORMAT_COFF)
|
1905 |
{ |
1906 |
char *temp_name;
|
1907 |
int j;
|
1908 |
EXE_SYM *sym; |
1909 |
temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
1910 |
if (!strcmp(temp_name, ".data")) { |
1911 |
for (j = 0, sym = symtab; j < nb_syms; j++, sym++) { |
1912 |
if (strstart(sym->st_name, sym_name, NULL)) { |
1913 |
addend -= sym->st_value; |
1914 |
} |
1915 |
} |
1916 |
} |
1917 |
} |
1918 |
type = rel->r_type; |
1919 |
if (is_label) {
|
1920 |
/* TCG uses elf relocation constants */
|
1921 |
#define R_386_32 1 |
1922 |
#define R_386_PC32 2 |
1923 |
switch(type) {
|
1924 |
case DIR32:
|
1925 |
type = R_386_32; |
1926 |
goto do_reloc;
|
1927 |
case DISP32:
|
1928 |
type = R_386_PC32; |
1929 |
addend -= 4;
|
1930 |
do_reloc:
|
1931 |
fprintf(outfile, " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
|
1932 |
reloc_offset, type, relname, addend); |
1933 |
break;
|
1934 |
default:
|
1935 |
error("unsupported i386 relocation (%d)", type);
|
1936 |
} |
1937 |
} else {
|
1938 |
switch(type) {
|
1939 |
case DIR32:
|
1940 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1941 |
reloc_offset, relname, addend); |
1942 |
break;
|
1943 |
case DISP32:
|
1944 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
|
1945 |
reloc_offset, relname, reloc_offset, addend); |
1946 |
break;
|
1947 |
default:
|
1948 |
error("unsupported i386 relocation (%d)", type);
|
1949 |
} |
1950 |
} |
1951 |
#else
|
1952 |
#error unsupport object format
|
1953 |
#endif
|
1954 |
} |
1955 |
} |
1956 |
} |
1957 |
#elif defined(HOST_X86_64)
|
1958 |
{ |
1959 |
char relname[256]; |
1960 |
int type, is_label;
|
1961 |
int addend;
|
1962 |
int reloc_offset;
|
1963 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1964 |
if (rel->r_offset >= start_offset &&
|
1965 |
rel->r_offset < start_offset + copy_size) { |
1966 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1967 |
is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
|
1968 |
type = ELF32_R_TYPE(rel->r_info); |
1969 |
addend = rel->r_addend; |
1970 |
reloc_offset = rel->r_offset - start_offset; |
1971 |
if (is_label) {
|
1972 |
switch(type) {
|
1973 |
case R_X86_64_32:
|
1974 |
case R_X86_64_32S:
|
1975 |
case R_X86_64_PC32:
|
1976 |
fprintf(outfile, " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
|
1977 |
reloc_offset, type, relname, addend); |
1978 |
break;
|
1979 |
default:
|
1980 |
error("unsupported X86_64 relocation (%d)", type);
|
1981 |
} |
1982 |
} else {
|
1983 |
switch(type) {
|
1984 |
case R_X86_64_32:
|
1985 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
|
1986 |
reloc_offset, relname, addend); |
1987 |
break;
|
1988 |
case R_X86_64_32S:
|
1989 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
|
1990 |
reloc_offset, relname, addend); |
1991 |
break;
|
1992 |
case R_X86_64_PC32:
|
1993 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1994 |
reloc_offset, relname, reloc_offset, addend); |
1995 |
break;
|
1996 |
default:
|
1997 |
error("unsupported X86_64 relocation (%d)", type);
|
1998 |
} |
1999 |
} |
2000 |
} |
2001 |
} |
2002 |
} |
2003 |
#elif defined(HOST_PPC)
|
2004 |
{ |
2005 |
#ifdef CONFIG_FORMAT_ELF
|
2006 |
char relname[256]; |
2007 |
int type;
|
2008 |
int addend;
|
2009 |
int reloc_offset;
|
2010 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2011 |
if (rel->r_offset >= start_offset &&
|
2012 |
rel->r_offset < start_offset + copy_size) { |
2013 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2014 |
reloc_offset = rel->r_offset - start_offset; |
2015 |
if (strstart(sym_name, "__op_jmp", &p)) { |
2016 |
int n;
|
2017 |
n = strtol(p, NULL, 10); |
2018 |
/* __op_jmp relocations are done at
|
2019 |
runtime to do translated block
|
2020 |
chaining: the offset of the instruction
|
2021 |
needs to be stored */
|
2022 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
2023 |
n, reloc_offset); |
2024 |
continue;
|
2025 |
} |
2026 |
|
2027 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2028 |
type = ELF32_R_TYPE(rel->r_info); |
2029 |
addend = rel->r_addend; |
2030 |
switch(type) {
|
2031 |
case R_PPC_ADDR32:
|
2032 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2033 |
reloc_offset, relname, addend); |
2034 |
break;
|
2035 |
case R_PPC_ADDR16_LO:
|
2036 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
2037 |
reloc_offset, relname, addend); |
2038 |
break;
|
2039 |
case R_PPC_ADDR16_HI:
|
2040 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
2041 |
reloc_offset, relname, addend); |
2042 |
break;
|
2043 |
case R_PPC_ADDR16_HA:
|
2044 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
2045 |
reloc_offset, relname, addend); |
2046 |
break;
|
2047 |
case R_PPC_REL24:
|
2048 |
/* warning: must be at 32 MB distancy */
|
2049 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
2050 |
reloc_offset, reloc_offset, relname, reloc_offset, addend); |
2051 |
break;
|
2052 |
default:
|
2053 |
error("unsupported powerpc relocation (%d)", type);
|
2054 |
} |
2055 |
} |
2056 |
} |
2057 |
#elif defined(CONFIG_FORMAT_MACH)
|
2058 |
struct scattered_relocation_info *scarel;
|
2059 |
struct relocation_info * rel;
|
2060 |
char final_sym_name[256]; |
2061 |
const char *sym_name; |
2062 |
const char *p; |
2063 |
int slide, sslide;
|
2064 |
int i;
|
2065 |
|
2066 |
for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
2067 |
unsigned int offset, length, value = 0; |
2068 |
unsigned int type, pcrel, isym = 0; |
2069 |
unsigned int usesym = 0; |
2070 |
|
2071 |
if(R_SCATTERED & rel->r_address) {
|
2072 |
scarel = (struct scattered_relocation_info*)rel;
|
2073 |
offset = (unsigned int)scarel->r_address; |
2074 |
length = scarel->r_length; |
2075 |
pcrel = scarel->r_pcrel; |
2076 |
type = scarel->r_type; |
2077 |
value = scarel->r_value; |
2078 |
} else {
|
2079 |
value = isym = rel->r_symbolnum; |
2080 |
usesym = (rel->r_extern); |
2081 |
offset = rel->r_address; |
2082 |
length = rel->r_length; |
2083 |
pcrel = rel->r_pcrel; |
2084 |
type = rel->r_type; |
2085 |
} |
2086 |
|
2087 |
slide = offset - start_offset; |
2088 |
|
2089 |
if (!(offset >= start_offset && offset < start_offset + size))
|
2090 |
continue; /* not in our range */ |
2091 |
|
2092 |
sym_name = get_reloc_name(rel, &sslide); |
2093 |
|
2094 |
if(usesym && symtab[isym].n_type & N_STAB)
|
2095 |
continue; /* don't handle STAB (debug sym) */ |
2096 |
|
2097 |
if (sym_name && strstart(sym_name, "__op_jmp", &p)) { |
2098 |
int n;
|
2099 |
n = strtol(p, NULL, 10); |
2100 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
2101 |
n, slide); |
2102 |
continue; /* Nothing more to do */ |
2103 |
} |
2104 |
|
2105 |
if(!sym_name) {
|
2106 |
fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
|
2107 |
name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type); |
2108 |
continue; /* dunno how to handle without final_sym_name */ |
2109 |
} |
2110 |
|
2111 |
get_reloc_expr(final_sym_name, sizeof(final_sym_name),
|
2112 |
sym_name); |
2113 |
switch(type) {
|
2114 |
case PPC_RELOC_BR24:
|
2115 |
if (!strstart(sym_name,"__op_gen_label",&p)) { |
2116 |
fprintf(outfile, "{\n");
|
2117 |
fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
|
2118 |
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",
|
2119 |
slide, slide, name, sslide); |
2120 |
fprintf(outfile, "}\n");
|
2121 |
} else {
|
2122 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
|
2123 |
slide, slide, final_sym_name, slide); |
2124 |
} |
2125 |
break;
|
2126 |
case PPC_RELOC_HI16:
|
2127 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
|
2128 |
slide, final_sym_name, sslide); |
2129 |
break;
|
2130 |
case PPC_RELOC_LO16:
|
2131 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
|
2132 |
slide, final_sym_name, sslide); |
2133 |
break;
|
2134 |
case PPC_RELOC_HA16:
|
2135 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
|
2136 |
slide, final_sym_name, sslide); |
2137 |
break;
|
2138 |
default:
|
2139 |
error("unsupported powerpc relocation (%d)", type);
|
2140 |
} |
2141 |
} |
2142 |
#else
|
2143 |
#error unsupport object format
|
2144 |
#endif
|
2145 |
} |
2146 |
#elif defined(HOST_S390)
|
2147 |
{ |
2148 |
char relname[256]; |
2149 |
int type;
|
2150 |
int addend;
|
2151 |
int reloc_offset;
|
2152 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2153 |
if (rel->r_offset >= start_offset &&
|
2154 |
rel->r_offset < start_offset + copy_size) { |
2155 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2156 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2157 |
type = ELF32_R_TYPE(rel->r_info); |
2158 |
addend = rel->r_addend; |
2159 |
reloc_offset = rel->r_offset - start_offset; |
2160 |
switch(type) {
|
2161 |
case R_390_32:
|
2162 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2163 |
reloc_offset, relname, addend); |
2164 |
break;
|
2165 |
case R_390_16:
|
2166 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2167 |
reloc_offset, relname, addend); |
2168 |
break;
|
2169 |
case R_390_8:
|
2170 |
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2171 |
reloc_offset, relname, addend); |
2172 |
break;
|
2173 |
case R_390_PC32DBL:
|
2174 |
if (ELF32_ST_TYPE(symtab[ELFW(R_SYM)(rel->r_info)].st_info) == STT_SECTION) {
|
2175 |
fprintf(outfile, |
2176 |
" *(uint32_t *)(gen_code_ptr + %d) += "
|
2177 |
"((long)&%s - (long)gen_code_ptr) >> 1;\n",
|
2178 |
reloc_offset, name); |
2179 |
} |
2180 |
else
|
2181 |
fprintf(outfile, |
2182 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2183 |
"(%s + %d - ((uint32_t)gen_code_ptr + %d)) >> 1;\n",
|
2184 |
reloc_offset, relname, addend, reloc_offset); |
2185 |
break;
|
2186 |
default:
|
2187 |
error("unsupported s390 relocation (%d)", type);
|
2188 |
} |
2189 |
} |
2190 |
} |
2191 |
} |
2192 |
#elif defined(HOST_ALPHA)
|
2193 |
{ |
2194 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
2195 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
2196 |
int type;
|
2197 |
long reloc_offset;
|
2198 |
|
2199 |
type = ELF64_R_TYPE(rel->r_info); |
2200 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
2201 |
reloc_offset = rel->r_offset - start_offset; |
2202 |
switch (type) {
|
2203 |
case R_ALPHA_GPDISP:
|
2204 |
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
|
2205 |
as an immediate instead of constructing it from the pv or ra. */
|
2206 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
|
2207 |
reloc_offset); |
2208 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
2209 |
reloc_offset + (int)rel->r_addend);
|
2210 |
break;
|
2211 |
case R_ALPHA_LITUSE:
|
2212 |
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
|
2213 |
now, since some called functions (libc) need pv to be set up. */
|
2214 |
break;
|
2215 |
case R_ALPHA_HINT:
|
2216 |
/* Branch target prediction hint. Ignore for now. Should be already
|
2217 |
correct for in-function jumps. */
|
2218 |
break;
|
2219 |
case R_ALPHA_LITERAL:
|
2220 |
/* Load a literal from the GOT relative to the gp. Since there's only a
|
2221 |
single gp, nothing is to be done. */
|
2222 |
break;
|
2223 |
case R_ALPHA_GPRELHIGH:
|
2224 |
/* Handle fake relocations against __op_param symbol. Need to emit the
|
2225 |
high part of the immediate value instead. Other symbols need no
|
2226 |
special treatment. */
|
2227 |
if (strstart(sym_name, "__op_param", &p)) |
2228 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
|
2229 |
reloc_offset, p); |
2230 |
break;
|
2231 |
case R_ALPHA_GPRELLOW:
|
2232 |
if (strstart(sym_name, "__op_param", &p)) |
2233 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
2234 |
reloc_offset, p); |
2235 |
break;
|
2236 |
case R_ALPHA_BRSGP:
|
2237 |
/* PC-relative jump. Tweak offset to skip the two instructions that try to
|
2238 |
set up the gp from the pv. */
|
2239 |
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
|
2240 |
reloc_offset, sym_name, reloc_offset); |
2241 |
break;
|
2242 |
default:
|
2243 |
error("unsupported Alpha relocation (%d)", type);
|
2244 |
} |
2245 |
} |
2246 |
} |
2247 |
} |
2248 |
#elif defined(HOST_IA64)
|
2249 |
{ |
2250 |
unsigned long sym_idx; |
2251 |
long code_offset;
|
2252 |
char relname[256]; |
2253 |
int type;
|
2254 |
long addend;
|
2255 |
|
2256 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2257 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2258 |
if (rel->r_offset < start_offset
|
2259 |
|| rel->r_offset >= start_offset + copy_size) |
2260 |
continue;
|
2261 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2262 |
code_offset = rel->r_offset - start_offset; |
2263 |
if (strstart(sym_name, "__op_jmp", &p)) { |
2264 |
int n;
|
2265 |
n = strtol(p, NULL, 10); |
2266 |
/* __op_jmp relocations are done at
|
2267 |
runtime to do translated block
|
2268 |
chaining: the offset of the instruction
|
2269 |
needs to be stored */
|
2270 |
fprintf(outfile, " jmp_offsets[%d] ="
|
2271 |
"%ld + (gen_code_ptr - gen_code_buf);\n",
|
2272 |
n, code_offset); |
2273 |
continue;
|
2274 |
} |
2275 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2276 |
type = ELF64_R_TYPE(rel->r_info); |
2277 |
addend = rel->r_addend; |
2278 |
switch(type) {
|
2279 |
case R_IA64_IMM64:
|
2280 |
fprintf(outfile, |
2281 |
" ia64_imm64(gen_code_ptr + %ld, "
|
2282 |
"%s + %ld);\n",
|
2283 |
code_offset, relname, addend); |
2284 |
break;
|
2285 |
case R_IA64_LTOFF22X:
|
2286 |
case R_IA64_LTOFF22:
|
2287 |
fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
|
2288 |
" %s + %ld, %d);\n",
|
2289 |
code_offset, relname, addend, |
2290 |
(type == R_IA64_LTOFF22X)); |
2291 |
break;
|
2292 |
case R_IA64_LDXMOV:
|
2293 |
fprintf(outfile, |
2294 |
" ia64_ldxmov(gen_code_ptr + %ld,"
|
2295 |
" %s + %ld);\n", code_offset, relname, addend);
|
2296 |
break;
|
2297 |
|
2298 |
case R_IA64_PCREL21B:
|
2299 |
if (strstart(sym_name, "__op_gen_label", NULL)) { |
2300 |
fprintf(outfile, |
2301 |
" ia64_imm21b(gen_code_ptr + %ld,"
|
2302 |
" (long) (%s + %ld -\n\t\t"
|
2303 |
"((long) gen_code_ptr + %ld)) >> 4);\n",
|
2304 |
code_offset, relname, addend, |
2305 |
code_offset & ~0xfUL);
|
2306 |
} else {
|
2307 |
fprintf(outfile, |
2308 |
" IA64_PLT(gen_code_ptr + %ld, "
|
2309 |
"%d);\t/* %s + %ld */\n",
|
2310 |
code_offset, |
2311 |
get_plt_index(sym_name, addend), |
2312 |
sym_name, addend); |
2313 |
} |
2314 |
break;
|
2315 |
default:
|
2316 |
error("unsupported ia64 relocation (0x%x)",
|
2317 |
type); |
2318 |
} |
2319 |
} |
2320 |
fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n",
|
2321 |
copy_size - 16 + 2); |
2322 |
} |
2323 |
#elif defined(HOST_SPARC)
|
2324 |
{ |
2325 |
char relname[256]; |
2326 |
int type;
|
2327 |
int addend;
|
2328 |
int reloc_offset;
|
2329 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2330 |
if (rel->r_offset >= start_offset &&
|
2331 |
rel->r_offset < start_offset + copy_size) { |
2332 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
2333 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2334 |
type = ELF32_R_TYPE(rel->r_info); |
2335 |
addend = rel->r_addend; |
2336 |
reloc_offset = rel->r_offset - start_offset; |
2337 |
switch(type) {
|
2338 |
case R_SPARC_32:
|
2339 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2340 |
reloc_offset, relname, addend); |
2341 |
break;
|
2342 |
case R_SPARC_HI22:
|
2343 |
fprintf(outfile, |
2344 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2345 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2346 |
" & ~0x3fffff) "
|
2347 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
2348 |
reloc_offset, reloc_offset, relname, addend); |
2349 |
break;
|
2350 |
case R_SPARC_LO10:
|
2351 |
fprintf(outfile, |
2352 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2353 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2354 |
" & ~0x3ff) "
|
2355 |
" | ((%s + %d) & 0x3ff);\n",
|
2356 |
reloc_offset, reloc_offset, relname, addend); |
2357 |
break;
|
2358 |
case R_SPARC_WDISP30:
|
2359 |
fprintf(outfile, |
2360 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2361 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2362 |
" & ~0x3fffffff) "
|
2363 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2364 |
" & 0x3fffffff);\n",
|
2365 |
reloc_offset, reloc_offset, relname, addend, |
2366 |
reloc_offset); |
2367 |
break;
|
2368 |
case R_SPARC_WDISP22:
|
2369 |
fprintf(outfile, |
2370 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2371 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2372 |
" & ~0x3fffff) "
|
2373 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2374 |
" & 0x3fffff);\n",
|
2375 |
rel->r_offset - start_offset, |
2376 |
rel->r_offset - start_offset, |
2377 |
relname, addend, |
2378 |
rel->r_offset - start_offset); |
2379 |
break;
|
2380 |
default:
|
2381 |
error("unsupported sparc relocation (%d)", type);
|
2382 |
} |
2383 |
} |
2384 |
} |
2385 |
} |
2386 |
#elif defined(HOST_SPARC64)
|
2387 |
{ |
2388 |
char relname[256]; |
2389 |
int type;
|
2390 |
int addend;
|
2391 |
int reloc_offset;
|
2392 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2393 |
if (rel->r_offset >= start_offset &&
|
2394 |
rel->r_offset < start_offset + copy_size) { |
2395 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
2396 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2397 |
type = ELF32_R_TYPE(rel->r_info); |
2398 |
addend = rel->r_addend; |
2399 |
reloc_offset = rel->r_offset - start_offset; |
2400 |
switch(type) {
|
2401 |
case R_SPARC_32:
|
2402 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2403 |
reloc_offset, relname, addend); |
2404 |
break;
|
2405 |
case R_SPARC_HI22:
|
2406 |
fprintf(outfile, |
2407 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2408 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2409 |
" & ~0x3fffff) "
|
2410 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
2411 |
reloc_offset, reloc_offset, relname, addend); |
2412 |
break;
|
2413 |
case R_SPARC_LO10:
|
2414 |
fprintf(outfile, |
2415 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2416 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2417 |
" & ~0x3ff) "
|
2418 |
" | ((%s + %d) & 0x3ff);\n",
|
2419 |
reloc_offset, reloc_offset, relname, addend); |
2420 |
break;
|
2421 |
case R_SPARC_OLO10:
|
2422 |
addend += ELF64_R_TYPE_DATA (rel->r_info); |
2423 |
fprintf(outfile, |
2424 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2425 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2426 |
" & ~0x3ff) "
|
2427 |
" | ((%s + %d) & 0x3ff);\n",
|
2428 |
reloc_offset, reloc_offset, relname, addend); |
2429 |
break;
|
2430 |
case R_SPARC_WDISP30:
|
2431 |
fprintf(outfile, |
2432 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2433 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2434 |
" & ~0x3fffffff) "
|
2435 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2436 |
" & 0x3fffffff);\n",
|
2437 |
reloc_offset, reloc_offset, relname, addend, |
2438 |
reloc_offset); |
2439 |
break;
|
2440 |
case R_SPARC_WDISP22:
|
2441 |
fprintf(outfile, |
2442 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2443 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2444 |
" & ~0x3fffff) "
|
2445 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2446 |
" & 0x3fffff);\n",
|
2447 |
reloc_offset, reloc_offset, relname, addend, |
2448 |
reloc_offset); |
2449 |
break;
|
2450 |
case R_SPARC_HH22:
|
2451 |
fprintf(outfile, |
2452 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2453 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2454 |
" & ~0x00000000) "
|
2455 |
" | (((%s + %d) >> 42) & 0x00000000);\n",
|
2456 |
reloc_offset, reloc_offset, relname, addend); |
2457 |
break;
|
2458 |
|
2459 |
case R_SPARC_LM22:
|
2460 |
fprintf(outfile, |
2461 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2462 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2463 |
" & ~0x00000000) "
|
2464 |
" | (((%s + %d) >> 10) & 0x00000000);\n",
|
2465 |
reloc_offset, reloc_offset, relname, addend); |
2466 |
break;
|
2467 |
|
2468 |
case R_SPARC_HM10:
|
2469 |
fprintf(outfile, |
2470 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2471 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2472 |
" & ~0x00000000) "
|
2473 |
" | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
|
2474 |
reloc_offset, reloc_offset, relname, addend); |
2475 |
break;
|
2476 |
|
2477 |
default:
|
2478 |
error("unsupported sparc64 relocation (%d) for symbol %s", type, relname);
|
2479 |
} |
2480 |
} |
2481 |
} |
2482 |
} |
2483 |
#elif defined(HOST_ARM)
|
2484 |
{ |
2485 |
char relname[256]; |
2486 |
int type;
|
2487 |
int addend;
|
2488 |
int reloc_offset;
|
2489 |
uint32_t insn; |
2490 |
|
2491 |
insn = get32((uint32_t *)(p_start + 4));
|
2492 |
/* If prologue ends in sub sp, sp, #const then assume
|
2493 |
op has a stack frame and needs the frame pointer. */
|
2494 |
if ((insn & 0xffffff00) == 0xe24dd000) { |
2495 |
int i;
|
2496 |
uint32_t opcode; |
2497 |
opcode = 0xe28db000; /* add fp, sp, #0. */ |
2498 |
#if 0
|
2499 |
/* ??? Need to undo the extra stack adjustment at the end of the op.
|
2500 |
For now just leave the stack misaligned and hope it doesn't break anything
|
2501 |
too important. */
|
2502 |
if ((insn & 4) != 0) {
|
2503 |
/* Preserve doubleword stack alignment. */
|
2504 |
fprintf(outfile,
|
2505 |
" *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
|
2506 |
insn + 4);
|
2507 |
opcode -= 4;
|
2508 |
}
|
2509 |
#endif
|
2510 |
insn = get32((uint32_t *)(p_start - 4));
|
2511 |
/* Calculate the size of the saved registers,
|
2512 |
excluding pc. */
|
2513 |
for (i = 0; i < 15; i++) { |
2514 |
if (insn & (1 << i)) |
2515 |
opcode += 4;
|
2516 |
} |
2517 |
fprintf(outfile, |
2518 |
" *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
|
2519 |
} |
2520 |
arm_emit_ldr_info(relname, start_offset, outfile, p_start, p_end, |
2521 |
relocs, nb_relocs); |
2522 |
|
2523 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2524 |
if (rel->r_offset >= start_offset &&
|
2525 |
rel->r_offset < start_offset + copy_size) { |
2526 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2527 |
/* the compiler leave some unnecessary references to the code */
|
2528 |
if (sym_name[0] == '\0') |
2529 |
continue;
|
2530 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2531 |
type = ELF32_R_TYPE(rel->r_info); |
2532 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
2533 |
reloc_offset = rel->r_offset - start_offset; |
2534 |
switch(type) {
|
2535 |
case R_ARM_ABS32:
|
2536 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2537 |
reloc_offset, relname, addend); |
2538 |
break;
|
2539 |
case R_ARM_PC24:
|
2540 |
case R_ARM_JUMP24:
|
2541 |
case R_ARM_CALL:
|
2542 |
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
|
2543 |
reloc_offset, addend, relname); |
2544 |
break;
|
2545 |
default:
|
2546 |
error("unsupported arm relocation (%d)", type);
|
2547 |
} |
2548 |
} |
2549 |
} |
2550 |
} |
2551 |
#elif defined(HOST_M68K)
|
2552 |
{ |
2553 |
char relname[256]; |
2554 |
int type;
|
2555 |
int addend;
|
2556 |
int reloc_offset;
|
2557 |
Elf32_Sym *sym; |
2558 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2559 |
if (rel->r_offset >= start_offset &&
|
2560 |
rel->r_offset < start_offset + copy_size) { |
2561 |
sym = &(symtab[ELFW(R_SYM)(rel->r_info)]); |
2562 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2563 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2564 |
type = ELF32_R_TYPE(rel->r_info); |
2565 |
addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend; |
2566 |
reloc_offset = rel->r_offset - start_offset; |
2567 |
switch(type) {
|
2568 |
case R_68K_32:
|
2569 |
fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
|
2570 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
|
2571 |
reloc_offset, relname, addend ); |
2572 |
break;
|
2573 |
case R_68K_PC32:
|
2574 |
fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
|
2575 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
|
2576 |
reloc_offset, relname, reloc_offset, /*sym->st_value+*/ addend);
|
2577 |
break;
|
2578 |
default:
|
2579 |
error("unsupported m68k relocation (%d)", type);
|
2580 |
} |
2581 |
} |
2582 |
} |
2583 |
} |
2584 |
#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
|
2585 |
{ |
2586 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
2587 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
2588 |
char relname[256]; |
2589 |
int type;
|
2590 |
int addend;
|
2591 |
int reloc_offset;
|
2592 |
|
2593 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
2594 |
/* the compiler leave some unnecessary references to the code */
|
2595 |
if (sym_name[0] == '\0') |
2596 |
continue;
|
2597 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
2598 |
type = ELF32_R_TYPE(rel->r_info); |
2599 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
2600 |
reloc_offset = rel->r_offset - start_offset; |
2601 |
switch (type) {
|
2602 |
case R_MIPS_26:
|
2603 |
fprintf(outfile, " /* R_MIPS_26 RELOC, offset 0x%x, name %s */\n",
|
2604 |
rel->r_offset, sym_name); |
2605 |
fprintf(outfile, |
2606 |
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
|
2607 |
"(0x%x & ~0x3fffff) "
|
2608 |
"| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
|
2609 |
" & 0x3fffff);\n",
|
2610 |
reloc_offset, addend, addend, relname, reloc_offset); |
2611 |
break;
|
2612 |
case R_MIPS_HI16:
|
2613 |
fprintf(outfile, " /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n",
|
2614 |
rel->r_offset, sym_name); |
2615 |
fprintf(outfile, |
2616 |
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
|
2617 |
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
|
2618 |
" & ~0xffff) "
|
2619 |
" | (((%s - 0x8000) >> 16) & 0xffff);\n",
|
2620 |
reloc_offset, reloc_offset, relname); |
2621 |
break;
|
2622 |
case R_MIPS_LO16:
|
2623 |
fprintf(outfile, " /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n",
|
2624 |
rel->r_offset, sym_name); |
2625 |
fprintf(outfile, |
2626 |
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
|
2627 |
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
|
2628 |
" & ~0xffff) "
|
2629 |
" | (%s & 0xffff);\n",
|
2630 |
reloc_offset, reloc_offset, relname); |
2631 |
break;
|
2632 |
case R_MIPS_PC16:
|
2633 |
fprintf(outfile, " /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n",
|
2634 |
rel->r_offset, sym_name); |
2635 |
fprintf(outfile, |
2636 |
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
|
2637 |
"(0x%x & ~0xffff) "
|
2638 |
"| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
|
2639 |
" & 0xffff);\n",
|
2640 |
reloc_offset, addend, addend, relname, reloc_offset); |
2641 |
break;
|
2642 |
case R_MIPS_GOT16:
|
2643 |
case R_MIPS_CALL16:
|
2644 |
fprintf(outfile, " /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n",
|
2645 |
rel->r_offset, sym_name); |
2646 |
fprintf(outfile, |
2647 |
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
|
2648 |
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
|
2649 |
" & ~0xffff) "
|
2650 |
" | (((%s - 0x8000) >> 16) & 0xffff);\n",
|
2651 |
reloc_offset, reloc_offset, relname); |
2652 |
break;
|
2653 |
default:
|
2654 |
error("unsupported MIPS relocation (%d)", type);
|
2655 |
} |
2656 |
} |
2657 |
} |
2658 |
} |
2659 |
#else
|
2660 |
#error unsupported CPU
|
2661 |
#endif
|
2662 |
fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
|
2663 |
fprintf(outfile, "}\n");
|
2664 |
fprintf(outfile, "break;\n\n");
|
2665 |
} else {
|
2666 |
fprintf(outfile, "static inline void gen_%s(", name);
|
2667 |
if (nb_args == 0) { |
2668 |
fprintf(outfile, "void");
|
2669 |
} else {
|
2670 |
for(i = 0; i < nb_args; i++) { |
2671 |
if (i != 0) |
2672 |
fprintf(outfile, ", ");
|
2673 |
fprintf(outfile, "long param%d", i + 1); |
2674 |
} |
2675 |
} |
2676 |
fprintf(outfile, ")\n");
|
2677 |
fprintf(outfile, "{\n");
|
2678 |
for(i = 0; i < nb_args; i++) { |
2679 |
fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
2680 |
} |
2681 |
fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
|
2682 |
fprintf(outfile, "}\n\n");
|
2683 |
} |
2684 |
} |
2685 |
|
2686 |
int gen_file(FILE *outfile, int out_type) |
2687 |
{ |
2688 |
int i;
|
2689 |
EXE_SYM *sym; |
2690 |
|
2691 |
if (out_type == OUT_INDEX_OP) {
|
2692 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2693 |
const char *name; |
2694 |
name = get_sym_name(sym); |
2695 |
if (strstart(name, OP_PREFIX, NULL)) { |
2696 |
gen_code(name, sym->st_value, sym->st_size, outfile, 2);
|
2697 |
} |
2698 |
} |
2699 |
} else if (out_type == OUT_GEN_OP) { |
2700 |
/* generate gen_xxx functions */
|
2701 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2702 |
const char *name; |
2703 |
name = get_sym_name(sym); |
2704 |
if (strstart(name, OP_PREFIX, NULL)) { |
2705 |
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
2706 |
if (sym->st_shndx != text_shndx)
|
2707 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
2708 |
#endif
|
2709 |
gen_code(name, sym->st_value, sym->st_size, outfile, 0);
|
2710 |
} |
2711 |
} |
2712 |
|
2713 |
} else {
|
2714 |
/* generate big code generation switch */
|
2715 |
|
2716 |
#ifdef HOST_ARM
|
2717 |
#error broken
|
2718 |
/* We need to know the size of all the ops so we can figure out when
|
2719 |
to emit constant pools. This must be consistent with opc.h. */
|
2720 |
fprintf(outfile, |
2721 |
"static const uint32_t arm_opc_size[] = {\n"
|
2722 |
" 0,\n" /* end */ |
2723 |
" 0,\n" /* nop */ |
2724 |
" 0,\n" /* nop1 */ |
2725 |
" 0,\n" /* nop2 */ |
2726 |
" 0,\n"); /* nop3 */ |
2727 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2728 |
const char *name; |
2729 |
name = get_sym_name(sym); |
2730 |
if (strstart(name, OP_PREFIX, NULL)) { |
2731 |
fprintf(outfile, " %d,\n", sym->st_size);
|
2732 |
} |
2733 |
} |
2734 |
fprintf(outfile, |
2735 |
"};\n");
|
2736 |
#endif
|
2737 |
|
2738 |
#ifdef HOST_ARM
|
2739 |
#error broken
|
2740 |
/* Arm is tricky because it uses constant pools for loading immediate values.
|
2741 |
We assume (and require) each function is code followed by a constant pool.
|
2742 |
All the ops are small so this should be ok. For each op we figure
|
2743 |
out how much "spare" range we have in the load instructions. This allows
|
2744 |
us to insert subsequent ops in between the op and the constant pool,
|
2745 |
eliminating the neeed to jump around the pool.
|
2746 |
|
2747 |
We currently generate:
|
2748 |
|
2749 |
[ For this example we assume merging would move op1_pool out of range.
|
2750 |
In practice we should be able to combine many ops before the offset
|
2751 |
limits are reached. ]
|
2752 |
op1_code;
|
2753 |
op2_code;
|
2754 |
goto op3;
|
2755 |
op2_pool;
|
2756 |
op1_pool;
|
2757 |
op3:
|
2758 |
op3_code;
|
2759 |
ret;
|
2760 |
op3_pool;
|
2761 |
|
2762 |
Ideally we'd put op1_pool before op2_pool, but that requires two passes.
|
2763 |
*/
|
2764 |
fprintf(outfile, |
2765 |
" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
|
2766 |
" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
|
2767 |
" uint32_t *arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
|
2768 |
/* Initialise the parmissible pool offset to an arbitary large value. */
|
2769 |
" uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
|
2770 |
#endif
|
2771 |
#ifdef HOST_IA64
|
2772 |
#error broken
|
2773 |
{ |
2774 |
long addend, not_first = 0; |
2775 |
unsigned long sym_idx; |
2776 |
int index, max_index;
|
2777 |
const char *sym_name; |
2778 |
EXE_RELOC *rel; |
2779 |
|
2780 |
max_index = -1;
|
2781 |
for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2782 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2783 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2784 |
if (strstart(sym_name, "__op_gen_label", NULL)) |
2785 |
continue;
|
2786 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
2787 |
continue;
|
2788 |
|
2789 |
addend = rel->r_addend; |
2790 |
index = get_plt_index(sym_name, addend); |
2791 |
if (index <= max_index)
|
2792 |
continue;
|
2793 |
max_index = index; |
2794 |
fprintf(outfile, " extern void %s(void);\n", sym_name);
|
2795 |
} |
2796 |
|
2797 |
fprintf(outfile, |
2798 |
" struct ia64_fixup *plt_fixes = NULL, "
|
2799 |
"*ltoff_fixes = NULL;\n"
|
2800 |
" static long plt_target[] = {\n\t");
|
2801 |
|
2802 |
max_index = -1;
|
2803 |
for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2804 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2805 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2806 |
if (strstart(sym_name, "__op_gen_label", NULL)) |
2807 |
continue;
|
2808 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
2809 |
continue;
|
2810 |
|
2811 |
addend = rel->r_addend; |
2812 |
index = get_plt_index(sym_name, addend); |
2813 |
if (index <= max_index)
|
2814 |
continue;
|
2815 |
max_index = index; |
2816 |
|
2817 |
if (not_first)
|
2818 |
fprintf(outfile, ",\n\t");
|
2819 |
not_first = 1;
|
2820 |
if (addend)
|
2821 |
fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
|
2822 |
else
|
2823 |
fprintf(outfile, "(long) &%s", sym_name);
|
2824 |
} |
2825 |
fprintf(outfile, "\n };\n"
|
2826 |
" unsigned int plt_offset[%u] = { 0 };\n", max_index + 1); |
2827 |
} |
2828 |
#endif
|
2829 |
|
2830 |
#ifdef HOST_ARM
|
2831 |
#error broken
|
2832 |
/* Generate constant pool if needed */
|
2833 |
fprintf(outfile, |
2834 |
" if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
|
2835 |
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
|
2836 |
"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
|
2837 |
" last_gen_code_ptr = gen_code_ptr;\n"
|
2838 |
" arm_ldr_ptr = arm_ldr_table;\n"
|
2839 |
" arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
|
2840 |
" arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
|
2841 |
" }\n");
|
2842 |
#endif
|
2843 |
|
2844 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2845 |
const char *name; |
2846 |
name = get_sym_name(sym); |
2847 |
if (strstart(name, OP_PREFIX, NULL)) { |
2848 |
#if 0
|
2849 |
printf("%4d: %s pos=0x%08x len=%d\n",
|
2850 |
i, name, sym->st_value, sym->st_size);
|
2851 |
#endif
|
2852 |
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
2853 |
if (sym->st_shndx != text_shndx)
|
2854 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
2855 |
#endif
|
2856 |
gen_code(name, sym->st_value, sym->st_size, outfile, 1);
|
2857 |
} |
2858 |
} |
2859 |
} |
2860 |
|
2861 |
return 0; |
2862 |
} |
2863 |
|
2864 |
void usage(void) |
2865 |
{ |
2866 |
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
2867 |
"usage: dyngen [-o outfile] [-c] objfile\n"
|
2868 |
"Generate a dynamic code generator from an object file\n"
|
2869 |
"-c output enum of operations\n"
|
2870 |
"-g output gen_op_xx() functions\n"
|
2871 |
); |
2872 |
exit(1);
|
2873 |
} |
2874 |
|
2875 |
int main(int argc, char **argv) |
2876 |
{ |
2877 |
int c, out_type;
|
2878 |
const char *filename, *outfilename; |
2879 |
FILE *outfile; |
2880 |
|
2881 |
outfilename = "out.c";
|
2882 |
out_type = OUT_CODE; |
2883 |
for(;;) {
|
2884 |
c = getopt(argc, argv, "ho:cg");
|
2885 |
if (c == -1) |
2886 |
break;
|
2887 |
switch(c) {
|
2888 |
case 'h': |
2889 |
usage(); |
2890 |
break;
|
2891 |
case 'o': |
2892 |
outfilename = optarg; |
2893 |
break;
|
2894 |
case 'c': |
2895 |
out_type = OUT_INDEX_OP; |
2896 |
break;
|
2897 |
case 'g': |
2898 |
out_type = OUT_GEN_OP; |
2899 |
break;
|
2900 |
} |
2901 |
} |
2902 |
if (optind >= argc)
|
2903 |
usage(); |
2904 |
filename = argv[optind]; |
2905 |
outfile = fopen(outfilename, "w");
|
2906 |
if (!outfile)
|
2907 |
error("could not open '%s'", outfilename);
|
2908 |
|
2909 |
load_object(filename); |
2910 |
gen_file(outfile, out_type); |
2911 |
fclose(outfile); |
2912 |
return 0; |
2913 |
} |