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831b7825 TS |
1 | /* |
2 | * Mach-O object file loading | |
3 | * | |
4 | * Copyright (c) 2006 Pierre d'Herbemont | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
fad6cb1a | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA |
831b7825 TS |
19 | */ |
20 | #include <stdio.h> | |
21 | #include <sys/types.h> | |
22 | #include <fcntl.h> | |
23 | #include <sys/stat.h> | |
24 | #include <errno.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/mman.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | ||
30 | #include "qemu.h" | |
31 | #include "disas.h" | |
32 | ||
33 | #include <mach-o/loader.h> | |
34 | #include <mach-o/fat.h> | |
35 | #include <mach-o/nlist.h> | |
36 | #include <mach-o/reloc.h> | |
37 | #include <mach-o/ppc/reloc.h> | |
38 | ||
39 | //#define DEBUG_MACHLOAD | |
40 | ||
41 | #ifdef DEBUG_MACHLOAD | |
93fcfe39 | 42 | # define DPRINTF(...) do { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0) |
831b7825 | 43 | #else |
93fcfe39 | 44 | # define DPRINTF(...) do { qemu_log(__VA_ARGS__); } while(0) |
831b7825 TS |
45 | #endif |
46 | ||
47 | # define check_mach_header(x) (x.magic == MH_CIGAM) | |
48 | ||
49 | extern const char *interp_prefix; | |
50 | ||
51 | /* we don't have a good implementation for this */ | |
52 | #define DONT_USE_DYLD_SHARED_MAP | |
53 | ||
54 | /* Pass extra arg to DYLD for debug */ | |
55 | //#define ACTIVATE_DYLD_TRACE | |
56 | ||
57 | //#define OVERRIDE_DYLINKER | |
58 | ||
59 | #ifdef OVERRIDE_DYLINKER | |
60 | # ifdef TARGET_I386 | |
61 | # define DYLINKER_NAME "/Users/steg/qemu/tests/i386-darwin-env/usr/lib/dyld" | |
62 | # else | |
63 | # define DYLINKER_NAME "/usr/lib/dyld" | |
64 | # endif | |
65 | #endif | |
66 | ||
67 | /* XXX: in an include */ | |
68 | struct nlist_extended | |
69 | { | |
70 | union { | |
71 | char *n_name; | |
72 | long n_strx; | |
73 | } n_un; | |
74 | unsigned char n_type; | |
75 | unsigned char n_sect; | |
76 | short st_desc; | |
77 | unsigned long st_value; | |
78 | unsigned long st_size; | |
79 | }; | |
80 | ||
81 | /* Print symbols in gdb */ | |
82 | void *macho_text_sect = 0; | |
83 | int macho_offset = 0; | |
84 | ||
85 | int load_object(const char *filename, struct target_pt_regs * regs, void ** mh); | |
86 | void qerror(const char *format, ...); | |
87 | #ifdef TARGET_I386 | |
88 | typedef struct mach_i386_thread_state { | |
89 | unsigned int eax; | |
90 | unsigned int ebx; | |
91 | unsigned int ecx; | |
92 | unsigned int edx; | |
93 | unsigned int edi; | |
94 | unsigned int esi; | |
95 | unsigned int ebp; | |
96 | unsigned int esp; | |
97 | unsigned int ss; | |
98 | unsigned int eflags; | |
99 | unsigned int eip; | |
100 | unsigned int cs; | |
101 | unsigned int ds; | |
102 | unsigned int es; | |
103 | unsigned int fs; | |
104 | unsigned int gs; | |
105 | } mach_i386_thread_state_t; | |
106 | ||
107 | void bswap_i386_thread_state(struct mach_i386_thread_state *ts) | |
108 | { | |
109 | bswap32s((uint32_t*)&ts->eax); | |
110 | bswap32s((uint32_t*)&ts->ebx); | |
111 | bswap32s((uint32_t*)&ts->ecx); | |
112 | bswap32s((uint32_t*)&ts->edx); | |
113 | bswap32s((uint32_t*)&ts->edi); | |
114 | bswap32s((uint32_t*)&ts->esi); | |
115 | bswap32s((uint32_t*)&ts->ebp); | |
116 | bswap32s((uint32_t*)&ts->esp); | |
117 | bswap32s((uint32_t*)&ts->ss); | |
118 | bswap32s((uint32_t*)&ts->eflags); | |
119 | bswap32s((uint32_t*)&ts->eip); | |
120 | bswap32s((uint32_t*)&ts->cs); | |
121 | bswap32s((uint32_t*)&ts->ds); | |
122 | bswap32s((uint32_t*)&ts->es); | |
123 | bswap32s((uint32_t*)&ts->fs); | |
124 | bswap32s((uint32_t*)&ts->gs); | |
125 | } | |
126 | #define target_thread_state mach_i386_thread_state | |
127 | #define TARGET_CPU_TYPE CPU_TYPE_I386 | |
128 | #define TARGET_CPU_NAME "i386" | |
129 | #endif | |
130 | ||
131 | #ifdef TARGET_PPC | |
132 | struct mach_ppc_thread_state { | |
133 | unsigned int srr0; /* Instruction address register (PC) */ | |
134 | unsigned int srr1; /* Machine state register (supervisor) */ | |
135 | unsigned int r0; | |
136 | unsigned int r1; | |
137 | unsigned int r2; | |
138 | unsigned int r3; | |
139 | unsigned int r4; | |
140 | unsigned int r5; | |
141 | unsigned int r6; | |
142 | unsigned int r7; | |
143 | unsigned int r8; | |
144 | unsigned int r9; | |
145 | unsigned int r10; | |
146 | unsigned int r11; | |
147 | unsigned int r12; | |
148 | unsigned int r13; | |
149 | unsigned int r14; | |
150 | unsigned int r15; | |
151 | unsigned int r16; | |
152 | unsigned int r17; | |
153 | unsigned int r18; | |
154 | unsigned int r19; | |
155 | unsigned int r20; | |
156 | unsigned int r21; | |
157 | unsigned int r22; | |
158 | unsigned int r23; | |
159 | unsigned int r24; | |
160 | unsigned int r25; | |
161 | unsigned int r26; | |
162 | unsigned int r27; | |
163 | unsigned int r28; | |
164 | unsigned int r29; | |
165 | unsigned int r30; | |
166 | unsigned int r31; | |
167 | ||
168 | unsigned int cr; /* Condition register */ | |
169 | unsigned int xer; /* User's integer exception register */ | |
170 | unsigned int lr; /* Link register */ | |
171 | unsigned int ctr; /* Count register */ | |
172 | unsigned int mq; /* MQ register (601 only) */ | |
173 | ||
174 | unsigned int vrsave; /* Vector Save Register */ | |
175 | }; | |
176 | ||
177 | void bswap_ppc_thread_state(struct mach_ppc_thread_state *ts) | |
178 | { | |
179 | bswap32s((uint32_t*)&ts->srr0); | |
180 | bswap32s((uint32_t*)&ts->srr1); | |
181 | bswap32s((uint32_t*)&ts->r0); | |
182 | bswap32s((uint32_t*)&ts->r1); | |
183 | bswap32s((uint32_t*)&ts->r2); | |
184 | bswap32s((uint32_t*)&ts->r3); | |
185 | bswap32s((uint32_t*)&ts->r4); | |
186 | bswap32s((uint32_t*)&ts->r5); | |
187 | bswap32s((uint32_t*)&ts->r6); | |
188 | bswap32s((uint32_t*)&ts->r7); | |
189 | bswap32s((uint32_t*)&ts->r8); | |
190 | bswap32s((uint32_t*)&ts->r9); | |
191 | bswap32s((uint32_t*)&ts->r10); | |
192 | bswap32s((uint32_t*)&ts->r11); | |
193 | bswap32s((uint32_t*)&ts->r12); | |
194 | bswap32s((uint32_t*)&ts->r13); | |
195 | bswap32s((uint32_t*)&ts->r14); | |
196 | bswap32s((uint32_t*)&ts->r15); | |
197 | bswap32s((uint32_t*)&ts->r16); | |
198 | bswap32s((uint32_t*)&ts->r17); | |
199 | bswap32s((uint32_t*)&ts->r18); | |
200 | bswap32s((uint32_t*)&ts->r19); | |
201 | bswap32s((uint32_t*)&ts->r20); | |
202 | bswap32s((uint32_t*)&ts->r21); | |
203 | bswap32s((uint32_t*)&ts->r22); | |
204 | bswap32s((uint32_t*)&ts->r23); | |
205 | bswap32s((uint32_t*)&ts->r24); | |
206 | bswap32s((uint32_t*)&ts->r25); | |
207 | bswap32s((uint32_t*)&ts->r26); | |
208 | bswap32s((uint32_t*)&ts->r27); | |
209 | bswap32s((uint32_t*)&ts->r28); | |
210 | bswap32s((uint32_t*)&ts->r29); | |
211 | bswap32s((uint32_t*)&ts->r30); | |
212 | bswap32s((uint32_t*)&ts->r31); | |
213 | ||
214 | bswap32s((uint32_t*)&ts->cr); | |
215 | bswap32s((uint32_t*)&ts->xer); | |
216 | bswap32s((uint32_t*)&ts->lr); | |
217 | bswap32s((uint32_t*)&ts->ctr); | |
218 | bswap32s((uint32_t*)&ts->mq); | |
219 | ||
220 | bswap32s((uint32_t*)&ts->vrsave); | |
221 | } | |
222 | ||
223 | #define target_thread_state mach_ppc_thread_state | |
224 | #define TARGET_CPU_TYPE CPU_TYPE_POWERPC | |
225 | #define TARGET_CPU_NAME "PowerPC" | |
226 | #endif | |
227 | ||
228 | struct target_thread_command { | |
229 | unsigned long cmd; /* LC_THREAD or LC_UNIXTHREAD */ | |
230 | unsigned long cmdsize; /* total size of this command */ | |
231 | unsigned long flavor; /* flavor of thread state */ | |
232 | unsigned long count; /* count of longs in thread state */ | |
233 | struct target_thread_state state; /* thread state for this flavor */ | |
234 | }; | |
235 | ||
236 | void bswap_tc(struct target_thread_command *tc) | |
237 | { | |
238 | bswap32s((uint32_t*)(&tc->flavor)); | |
239 | bswap32s((uint32_t*)&tc->count); | |
240 | #if defined(TARGET_I386) | |
241 | bswap_i386_thread_state(&tc->state); | |
242 | #elif defined(TARGET_PPC) | |
243 | bswap_ppc_thread_state(&tc->state); | |
244 | #else | |
245 | # error unknown TARGET_CPU_TYPE | |
246 | #endif | |
247 | } | |
248 | ||
249 | void bswap_mh(struct mach_header *mh) | |
250 | { | |
251 | bswap32s((uint32_t*)(&mh->magic)); | |
252 | bswap32s((uint32_t*)&mh->cputype); | |
253 | bswap32s((uint32_t*)&mh->cpusubtype); | |
254 | bswap32s((uint32_t*)&mh->filetype); | |
255 | bswap32s((uint32_t*)&mh->ncmds); | |
256 | bswap32s((uint32_t*)&mh->sizeofcmds); | |
257 | bswap32s((uint32_t*)&mh->flags); | |
258 | } | |
259 | ||
260 | void bswap_lc(struct load_command *lc) | |
261 | { | |
262 | bswap32s((uint32_t*)&lc->cmd); | |
263 | bswap32s((uint32_t*)&lc->cmdsize); | |
264 | } | |
265 | ||
266 | ||
267 | void bswap_fh(struct fat_header *fh) | |
268 | { | |
269 | bswap32s((uint32_t*)&fh->magic); | |
270 | bswap32s((uint32_t*)&fh->nfat_arch); | |
271 | } | |
272 | ||
273 | void bswap_fa(struct fat_arch *fa) | |
274 | { | |
275 | bswap32s((uint32_t*)&fa->cputype); | |
276 | bswap32s((uint32_t*)&fa->cpusubtype); | |
277 | bswap32s((uint32_t*)&fa->offset); | |
278 | bswap32s((uint32_t*)&fa->size); | |
279 | bswap32s((uint32_t*)&fa->align); | |
280 | } | |
281 | ||
282 | void bswap_segcmd(struct segment_command *sc) | |
283 | { | |
284 | bswap32s((uint32_t*)&sc->vmaddr); | |
285 | bswap32s((uint32_t*)&sc->vmsize); | |
286 | bswap32s((uint32_t*)&sc->fileoff); | |
287 | bswap32s((uint32_t*)&sc->filesize); | |
288 | bswap32s((uint32_t*)&sc->maxprot); | |
289 | bswap32s((uint32_t*)&sc->initprot); | |
290 | bswap32s((uint32_t*)&sc->nsects); | |
291 | bswap32s((uint32_t*)&sc->flags); | |
292 | } | |
293 | ||
294 | void bswap_symtabcmd(struct symtab_command *stc) | |
295 | { | |
296 | bswap32s((uint32_t*)&stc->cmd); | |
297 | bswap32s((uint32_t*)&stc->cmdsize); | |
298 | bswap32s((uint32_t*)&stc->symoff); | |
299 | bswap32s((uint32_t*)&stc->nsyms); | |
300 | bswap32s((uint32_t*)&stc->stroff); | |
301 | bswap32s((uint32_t*)&stc->strsize); | |
302 | } | |
303 | ||
304 | void bswap_sym(struct nlist *n) | |
305 | { | |
306 | bswap32s((uint32_t*)&n->n_un.n_strx); | |
307 | bswap16s((uint16_t*)&n->n_desc); | |
308 | bswap32s((uint32_t*)&n->n_value); | |
309 | } | |
310 | ||
311 | int load_thread(struct mach_header *mh, struct target_thread_command *tc, struct target_pt_regs * regs, int fd, int mh_pos, int need_bswap) | |
312 | { | |
313 | int entry; | |
314 | if(need_bswap) | |
315 | bswap_tc(tc); | |
316 | #if defined(TARGET_I386) | |
317 | entry = tc->state.eip; | |
318 | DPRINTF(" eax 0x%.8x\n ebx 0x%.8x\n ecx 0x%.8x\n edx 0x%.8x\n edi 0x%.8x\n esi 0x%.8x\n ebp 0x%.8x\n esp 0x%.8x\n ss 0x%.8x\n eflags 0x%.8x\n eip 0x%.8x\n cs 0x%.8x\n ds 0x%.8x\n es 0x%.8x\n fs 0x%.8x\n gs 0x%.8x\n", | |
319 | tc->state.eax, tc->state.ebx, tc->state.ecx, tc->state.edx, tc->state.edi, tc->state.esi, tc->state.ebp, | |
320 | tc->state.esp, tc->state.ss, tc->state.eflags, tc->state.eip, tc->state.cs, tc->state.ds, tc->state.es, | |
321 | tc->state.fs, tc->state.gs ); | |
322 | #define reg_copy(reg) regs->reg = tc->state.reg | |
323 | if(regs) | |
324 | { | |
325 | reg_copy(eax); | |
326 | reg_copy(ebx); | |
327 | reg_copy(ecx); | |
328 | reg_copy(edx); | |
329 | ||
330 | reg_copy(edi); | |
331 | reg_copy(esi); | |
332 | ||
333 | reg_copy(ebp); | |
334 | reg_copy(esp); | |
335 | ||
336 | reg_copy(eflags); | |
337 | reg_copy(eip); | |
338 | /* | |
339 | reg_copy(ss); | |
340 | reg_copy(cs); | |
341 | reg_copy(ds); | |
342 | reg_copy(es); | |
343 | reg_copy(fs); | |
344 | reg_copy(gs);*/ | |
345 | } | |
346 | #undef reg_copy | |
347 | #elif defined(TARGET_PPC) | |
348 | entry = tc->state.srr0; | |
349 | #endif | |
350 | DPRINTF("load_thread: entry 0x%x\n", entry); | |
351 | return entry; | |
352 | } | |
353 | ||
354 | int load_dylinker(struct mach_header *mh, struct dylinker_command *dc, int fd, int mh_pos, int need_bswap) | |
355 | { | |
356 | int size; | |
357 | char * dylinker_name; | |
358 | size = dc->cmdsize - sizeof(struct dylinker_command); | |
359 | ||
360 | if(need_bswap) | |
361 | dylinker_name = (char*)(bswap_32(dc->name.offset)+(int)dc); | |
362 | else | |
363 | dylinker_name = (char*)((dc->name.offset)+(int)dc); | |
364 | ||
365 | #ifdef OVERRIDE_DYLINKER | |
366 | dylinker_name = DYLINKER_NAME; | |
367 | #else | |
368 | if(asprintf(&dylinker_name, "%s%s", interp_prefix, dylinker_name) == -1) | |
369 | qerror("can't allocate the new dylinker name\n"); | |
370 | #endif | |
371 | ||
372 | DPRINTF("dylinker_name %s\n", dylinker_name); | |
373 | return load_object(dylinker_name, NULL, NULL); | |
374 | } | |
375 | ||
376 | int load_segment(struct mach_header *mh, struct segment_command *sc, int fd, int mh_pos, int need_bswap, int fixed, int slide) | |
377 | { | |
378 | unsigned long addr = sc->vmaddr; | |
379 | unsigned long size = sc->filesize; | |
380 | unsigned long error = 0; | |
381 | ||
382 | if(need_bswap) | |
383 | bswap_segcmd(sc); | |
384 | ||
385 | if(sc->vmaddr == 0) | |
386 | { | |
387 | DPRINTF("load_segment: sc->vmaddr == 0 returning\n"); | |
388 | return -1; | |
389 | } | |
390 | ||
391 | if (strcmp(sc->segname, "__PAGEZERO") == 0) | |
392 | { | |
393 | DPRINTF("load_segment: __PAGEZERO returning\n"); | |
394 | return -1; | |
395 | } | |
396 | ||
397 | /* Right now mmap memory */ | |
398 | /* XXX: should check to see that the space is free, because MAP_FIXED is dangerous */ | |
399 | DPRINTF("load_segment: mmaping %s to 0x%x-(0x%x|0x%x) + 0x%x\n", sc->segname, sc->vmaddr, sc->filesize, sc->vmsize, slide); | |
400 | ||
401 | if(sc->filesize > 0) | |
402 | { | |
403 | int opt = 0; | |
404 | ||
405 | if(fixed) | |
406 | opt |= MAP_FIXED; | |
407 | ||
408 | DPRINTF("sc->vmaddr 0x%x slide 0x%x add 0x%x\n", slide, sc->vmaddr, sc->vmaddr+slide); | |
409 | ||
410 | addr = target_mmap(sc->vmaddr+slide, sc->filesize, sc->initprot, opt, fd, mh_pos + sc->fileoff); | |
411 | ||
412 | if(addr==-1) | |
413 | qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); | |
414 | ||
415 | error = addr-sc->vmaddr; | |
416 | } | |
417 | else | |
418 | { | |
419 | addr = sc->vmaddr+slide; | |
420 | error = slide; | |
421 | } | |
422 | ||
423 | if(sc->vmsize > sc->filesize) | |
424 | { | |
425 | addr += sc->filesize; | |
426 | size = sc->vmsize-sc->filesize; | |
427 | addr = target_mmap(addr, size, sc->initprot, MAP_ANONYMOUS | MAP_FIXED, -1, 0); | |
428 | if(addr==-1) | |
429 | qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); | |
430 | } | |
431 | ||
432 | return error; | |
433 | } | |
434 | ||
435 | void *load_data(int fd, long offset, unsigned int size) | |
436 | { | |
437 | char *data; | |
438 | ||
439 | data = malloc(size); | |
440 | if (!data) | |
441 | return NULL; | |
442 | lseek(fd, offset, SEEK_SET); | |
443 | if (read(fd, data, size) != size) { | |
444 | free(data); | |
445 | return NULL; | |
446 | } | |
447 | return data; | |
448 | } | |
449 | ||
450 | /* load a mach-o object file */ | |
451 | int load_object(const char *filename, struct target_pt_regs * regs, void ** mh) | |
452 | { | |
453 | int need_bswap = 0; | |
454 | int entry_point = 0; | |
455 | int dyld_entry_point = 0; | |
456 | int slide, mmapfixed; | |
457 | int fd; | |
458 | struct load_command *lcmds, *lc; | |
459 | int is_fat = 0; | |
460 | unsigned int i, magic; | |
461 | int mach_hdr_pos = 0; | |
462 | struct mach_header mach_hdr; | |
463 | ||
464 | /* for symbol lookup whith -d flag. */ | |
465 | struct symtab_command * symtabcmd = 0; | |
466 | struct nlist_extended *symtab, *sym; | |
467 | struct nlist *symtab_std, *syment; | |
468 | char *strtab; | |
469 | ||
470 | fd = open(filename, O_RDONLY); | |
471 | if (fd < 0) | |
472 | qerror("can't open file '%s'", filename); | |
473 | ||
474 | /* Read magic header. */ | |
475 | if (read(fd, &magic, sizeof (magic)) != sizeof (magic)) | |
476 | qerror("unable to read Magic of '%s'", filename); | |
477 | ||
478 | /* Check Mach identification. */ | |
479 | if(magic == MH_MAGIC) | |
480 | { | |
481 | is_fat = 0; | |
482 | need_bswap = 0; | |
483 | } else if (magic == MH_CIGAM) | |
484 | { | |
485 | is_fat = 0; | |
486 | need_bswap = 1; | |
487 | } else if (magic == FAT_MAGIC) | |
488 | { | |
489 | is_fat = 1; | |
490 | need_bswap = 0; | |
491 | } else if (magic == FAT_CIGAM) | |
492 | { | |
493 | is_fat = 1; | |
494 | need_bswap = 1; | |
495 | } | |
496 | else | |
497 | qerror("Not a Mach-O file.", filename); | |
498 | ||
499 | DPRINTF("loading %s %s...\n", filename, is_fat ? "[FAT]": "[REGULAR]"); | |
500 | if(is_fat) | |
501 | { | |
502 | int found = 0; | |
503 | struct fat_header fh; | |
504 | struct fat_arch *fa; | |
505 | ||
506 | lseek(fd, 0, SEEK_SET); | |
507 | ||
508 | /* Read Fat header. */ | |
509 | if (read(fd, &fh, sizeof (fh)) != sizeof (fh)) | |
510 | qerror("unable to read file header"); | |
511 | ||
512 | if(need_bswap) | |
513 | bswap_fh(&fh); | |
514 | ||
515 | /* Read Fat Arch. */ | |
516 | fa = malloc(sizeof(struct fat_arch)*fh.nfat_arch); | |
517 | ||
518 | if (read(fd, fa, sizeof(struct fat_arch)*fh.nfat_arch) != sizeof(struct fat_arch)*fh.nfat_arch) | |
519 | qerror("unable to read file header"); | |
520 | ||
521 | for( i = 0; i < fh.nfat_arch; i++, fa++) | |
522 | { | |
523 | if(need_bswap) | |
524 | bswap_fa(fa); | |
525 | if(fa->cputype == TARGET_CPU_TYPE) | |
526 | { | |
527 | mach_hdr_pos = fa->offset; | |
528 | lseek(fd, mach_hdr_pos, SEEK_SET); | |
529 | ||
530 | /* Read Mach header. */ | |
531 | ||
532 | if (read(fd, &mach_hdr, sizeof(struct mach_header)) != sizeof (struct mach_header)) | |
533 | qerror("unable to read file header"); | |
534 | ||
535 | if(mach_hdr.magic == MH_MAGIC) | |
536 | need_bswap = 0; | |
537 | else if (mach_hdr.magic == MH_CIGAM) | |
538 | need_bswap = 1; | |
539 | else | |
540 | qerror("Invalid mach header in Fat Mach-O File"); | |
541 | found = 1; | |
542 | break; | |
543 | } | |
544 | } | |
545 | if(!found) | |
546 | qerror("%s: No %s CPU found in FAT Header", filename, TARGET_CPU_NAME); | |
547 | } | |
548 | else | |
549 | { | |
550 | lseek(fd, 0, SEEK_SET); | |
551 | /* Read Mach header */ | |
552 | if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) | |
553 | qerror("%s: unable to read file header", filename); | |
554 | } | |
555 | ||
556 | if(need_bswap) | |
557 | bswap_mh(&mach_hdr); | |
558 | ||
559 | if ((mach_hdr.cputype) != TARGET_CPU_TYPE) | |
560 | qerror("%s: Unsupported CPU 0x%x (only 0x%x(%s) supported)", filename, mach_hdr.cputype, TARGET_CPU_TYPE, TARGET_CPU_NAME); | |
561 | ||
562 | ||
563 | switch(mach_hdr.filetype) | |
564 | { | |
565 | case MH_EXECUTE: break; | |
566 | case MH_FVMLIB: | |
567 | case MH_DYLIB: | |
568 | case MH_DYLINKER: break; | |
569 | default: | |
570 | qerror("%s: Unsupported Mach type (0x%x)", filename, mach_hdr.filetype); | |
571 | } | |
572 | ||
573 | /* read segment headers */ | |
574 | lcmds = malloc(mach_hdr.sizeofcmds); | |
575 | ||
576 | if(read(fd, lcmds, mach_hdr.sizeofcmds) != mach_hdr.sizeofcmds) | |
577 | qerror("%s: unable to read load_command", filename); | |
578 | slide = 0; | |
579 | mmapfixed = 0; | |
580 | for(i=0, lc = lcmds; i < (mach_hdr.ncmds) ; i++) | |
581 | { | |
582 | ||
583 | if(need_bswap) | |
584 | bswap_lc(lc); | |
585 | switch(lc->cmd) | |
586 | { | |
587 | case LC_SEGMENT: | |
588 | /* The main_exe can't be relocated */ | |
589 | if(mach_hdr.filetype == MH_EXECUTE) | |
590 | mmapfixed = 1; | |
591 | ||
592 | slide = load_segment(&mach_hdr, (struct segment_command*)lc, fd, mach_hdr_pos, need_bswap, mmapfixed, slide); | |
593 | ||
594 | /* other segment must be mapped according to slide exactly, if load_segment did something */ | |
595 | if(slide != -1) | |
596 | mmapfixed = 1; | |
597 | else | |
598 | slide = 0; /* load_segment didn't map the segment */ | |
599 | ||
600 | if(mach_hdr.filetype == MH_EXECUTE && slide != 0) | |
601 | qerror("%s: Warning executable can't be mapped at the right address (offset: 0x%x)\n", filename, slide); | |
602 | ||
603 | if(strcmp(((struct segment_command*)(lc))->segname, "__TEXT") == 0) | |
604 | { | |
605 | /* Text section */ | |
606 | if(mach_hdr.filetype == MH_EXECUTE) | |
607 | { | |
608 | /* return the mach_header */ | |
609 | *mh = (void*)(((struct segment_command*)(lc))->vmaddr + slide); | |
610 | } | |
611 | else | |
612 | { | |
613 | /* it is dyld save the section for gdb, we will be interested in dyld symbol | |
614 | while debuging */ | |
615 | macho_text_sect = (void*)(((struct segment_command*)(lc))->vmaddr + slide); | |
616 | macho_offset = slide; | |
617 | } | |
618 | } | |
619 | break; | |
620 | case LC_LOAD_DYLINKER: | |
621 | dyld_entry_point = load_dylinker( &mach_hdr, (struct dylinker_command*)lc, fd, mach_hdr_pos, need_bswap ); | |
622 | break; | |
623 | case LC_LOAD_DYLIB: | |
624 | /* dyld will do that for us */ | |
625 | break; | |
626 | case LC_THREAD: | |
627 | case LC_UNIXTHREAD: | |
628 | { | |
629 | struct target_pt_regs * _regs; | |
630 | if(mach_hdr.filetype == MH_DYLINKER) | |
631 | _regs = regs; | |
632 | else | |
633 | _regs = 0; | |
634 | entry_point = load_thread( &mach_hdr, (struct target_thread_command*)lc, _regs, fd, mach_hdr_pos, need_bswap ); | |
635 | } | |
636 | break; | |
637 | case LC_SYMTAB: | |
638 | /* Save the symtab and strtab */ | |
639 | symtabcmd = (struct symtab_command *)lc; | |
640 | break; | |
641 | case LC_ID_DYLINKER: | |
642 | case LC_ID_DYLIB: | |
643 | case LC_UUID: | |
644 | case LC_DYSYMTAB: | |
645 | case LC_TWOLEVEL_HINTS: | |
646 | case LC_PREBIND_CKSUM: | |
647 | case LC_SUB_LIBRARY: | |
648 | break; | |
649 | default: fprintf(stderr, "warning: unkown command 0x%x in '%s'\n", lc->cmd, filename); | |
650 | } | |
651 | lc = (struct load_command*)((int)(lc)+(lc->cmdsize)); | |
652 | } | |
653 | ||
654 | if(symtabcmd) | |
655 | { | |
656 | if(need_bswap) | |
657 | bswap_symtabcmd(symtabcmd); | |
658 | ||
659 | symtab_std = load_data(fd, symtabcmd->symoff+mach_hdr_pos, symtabcmd->nsyms * sizeof(struct nlist)); | |
660 | strtab = load_data(fd, symtabcmd->stroff+mach_hdr_pos, symtabcmd->strsize); | |
661 | ||
662 | symtab = malloc(sizeof(struct nlist_extended) * symtabcmd->nsyms); | |
663 | ||
664 | if(need_bswap) | |
665 | { | |
666 | for(i = 0, syment = symtab_std; i < symtabcmd->nsyms; i++, syment++) | |
667 | bswap_sym(syment); | |
668 | } | |
669 | ||
670 | for(i = 0, sym = symtab, syment = symtab_std; i < symtabcmd->nsyms; i++, sym++, syment++) | |
671 | { | |
672 | struct nlist *sym_follow, *sym_next = 0; | |
673 | unsigned int j; | |
674 | memset(sym, 0, sizeof(*sym)); | |
675 | ||
676 | sym->n_type = syment->n_type; | |
677 | if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ | |
678 | continue; | |
679 | ||
680 | memcpy(sym, syment, sizeof(*syment)); | |
681 | ||
682 | /* Find the following symbol in order to get the current symbol size */ | |
683 | for(j = 0, sym_follow = symtab_std; j < symtabcmd->nsyms; j++, sym_follow++) { | |
684 | if ( sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) | |
685 | continue; | |
686 | if(!sym_next) { | |
687 | sym_next = sym_follow; | |
688 | continue; | |
689 | } | |
690 | if(!(sym_next->n_value > sym_follow->n_value)) | |
691 | continue; | |
692 | sym_next = sym_follow; | |
693 | } | |
694 | if(sym_next) | |
695 | sym->st_size = sym_next->n_value - sym->st_value; | |
696 | else | |
697 | sym->st_size = 10; /* XXX: text_sec_hdr->size + text_sec_hdr->offset - sym->st_value; */ | |
698 | ||
699 | sym->st_value += slide; | |
700 | } | |
701 | ||
702 | free((void*)symtab_std); | |
703 | ||
704 | { | |
705 | DPRINTF("saving symtab of %s (%d symbol(s))\n", filename, symtabcmd->nsyms); | |
706 | struct syminfo *s; | |
707 | s = malloc(sizeof(*s)); | |
708 | s->disas_symtab = symtab; | |
709 | s->disas_strtab = strtab; | |
710 | s->disas_num_syms = symtabcmd->nsyms; | |
711 | s->next = syminfos; | |
712 | syminfos = s; | |
713 | } | |
714 | } | |
715 | close(fd); | |
716 | if(mach_hdr.filetype == MH_EXECUTE && dyld_entry_point) | |
717 | return dyld_entry_point; | |
718 | else | |
719 | return entry_point+slide; | |
720 | } | |
721 | ||
722 | extern unsigned long stack_size; | |
723 | ||
724 | unsigned long setup_arg_pages(void * mh, char ** argv, char ** env) | |
725 | { | |
726 | unsigned long stack_base, error, size; | |
727 | int i; | |
728 | int * stack; | |
729 | int argc, envc; | |
730 | ||
731 | /* Create enough stack to hold everything. If we don't use | |
732 | * it for args, we'll use it for something else... | |
733 | */ | |
734 | size = stack_size; | |
735 | ||
736 | error = target_mmap(0, | |
737 | size + qemu_host_page_size, | |
738 | PROT_READ | PROT_WRITE, | |
739 | MAP_PRIVATE | MAP_ANONYMOUS, | |
740 | -1, 0); | |
741 | if (error == -1) | |
742 | qerror("stk mmap"); | |
743 | ||
744 | /* we reserve one extra page at the top of the stack as guard */ | |
745 | target_mprotect(error + size, qemu_host_page_size, PROT_NONE); | |
746 | ||
747 | stack_base = error + size; | |
748 | stack = (void*)stack_base; | |
749 | /* | |
750 | * | STRING AREA | | |
751 | * +-------------+ | |
752 | * | 0 | | |
753 | * +-------------+ | |
754 | * | apple[n] | | |
755 | * +-------------+ | |
756 | * : | |
757 | * +-------------+ | |
758 | * | apple[0] | | |
759 | * +-------------+ | |
760 | * | 0 | | |
761 | * +-------------+ | |
762 | * | env[n] | | |
763 | * +-------------+ | |
764 | * : | |
765 | * : | |
766 | * +-------------+ | |
767 | * | env[0] | | |
768 | * +-------------+ | |
769 | * | 0 | | |
770 | * +-------------+ | |
771 | * | arg[argc-1] | | |
772 | * +-------------+ | |
773 | * : | |
774 | * : | |
775 | * +-------------+ | |
776 | * | arg[0] | | |
777 | * +-------------+ | |
778 | * | argc | | |
779 | * +-------------+ | |
780 | * sp-> | mh | address of where the a.out's file offset 0 is in memory | |
781 | * +-------------+ | |
782 | */ | |
783 | /* Construct the stack Stack grows down */ | |
784 | stack--; | |
785 | ||
786 | /* XXX: string should go up there */ | |
787 | ||
788 | *stack = 0; | |
789 | stack--; | |
790 | ||
791 | /* Push the absolute path of our executable */ | |
792 | DPRINTF("pushing apple %s (0x%x)\n", (char*)argv[0], (int)argv[0]); | |
793 | stl(stack, (int) argv[0]); | |
794 | ||
795 | stack--; | |
796 | ||
797 | stl(stack, 0); | |
798 | stack--; | |
799 | ||
800 | /* Get envc */ | |
801 | for(envc = 0; env[envc]; envc++); | |
802 | ||
803 | for(i = envc-1; i >= 0; i--) | |
804 | { | |
805 | DPRINTF("pushing env %s (0x%x)\n", (char*)env[i], (int)env[i]); | |
806 | stl(stack, (int)env[i]); | |
807 | stack--; | |
808 | ||
809 | /* XXX: remove that when string will be on top of the stack */ | |
810 | page_set_flags((int)env[i], (int)(env[i]+strlen(env[i])), PROT_READ | PAGE_VALID); | |
811 | } | |
812 | ||
813 | /* Add on the stack the interp_prefix choosen if so */ | |
814 | if(interp_prefix[0]) | |
815 | { | |
816 | char *dyld_root; | |
817 | asprintf(&dyld_root, "DYLD_ROOT_PATH=%s", interp_prefix); | |
818 | page_set_flags((int)dyld_root, (int)(dyld_root+strlen(interp_prefix)+1), PROT_READ | PAGE_VALID); | |
819 | ||
820 | stl(stack, (int)dyld_root); | |
821 | stack--; | |
822 | } | |
823 | ||
824 | #ifdef DONT_USE_DYLD_SHARED_MAP | |
825 | { | |
826 | char *shared_map_mode; | |
827 | asprintf(&shared_map_mode, "DYLD_SHARED_REGION=avoid"); | |
828 | page_set_flags((int)shared_map_mode, (int)(shared_map_mode+strlen(shared_map_mode)+1), PROT_READ | PAGE_VALID); | |
829 | ||
830 | stl(stack, (int)shared_map_mode); | |
831 | stack--; | |
832 | } | |
833 | #endif | |
834 | ||
835 | #ifdef ACTIVATE_DYLD_TRACE | |
836 | char * extra_env_static[] = {"DYLD_DEBUG_TRACE=yes", | |
837 | "DYLD_PREBIND_DEBUG=3", "DYLD_UNKNOW_TRACE=yes", | |
838 | "DYLD_PRINT_INITIALIZERS=yes", | |
839 | "DYLD_PRINT_SEGMENTS=yes", "DYLD_PRINT_REBASINGS=yes", "DYLD_PRINT_BINDINGS=yes", "DYLD_PRINT_INITIALIZERS=yes", "DYLD_PRINT_WARNINGS=yes" }; | |
840 | ||
841 | char ** extra_env = malloc(sizeof(extra_env_static)); | |
842 | bcopy(extra_env_static, extra_env, sizeof(extra_env_static)); | |
843 | page_set_flags((int)extra_env, (int)((void*)extra_env+sizeof(extra_env_static)), PROT_READ | PAGE_VALID); | |
844 | ||
845 | for(i = 0; i<9; i++) | |
846 | { | |
847 | DPRINTF("pushing (extra) env %s (0x%x)\n", (char*)extra_env[i], (int)extra_env[i]); | |
848 | stl(stack, (int) extra_env[i]); | |
849 | stack--; | |
850 | } | |
851 | #endif | |
852 | ||
853 | stl(stack, 0); | |
854 | stack--; | |
855 | ||
856 | /* Get argc */ | |
857 | for(argc = 0; argv[argc]; argc++); | |
858 | ||
859 | for(i = argc-1; i >= 0; i--) | |
860 | { | |
861 | DPRINTF("pushing arg %s (0x%x)\n", (char*)argv[i], (int)argv[i]); | |
862 | stl(stack, (int) argv[i]); | |
863 | stack--; | |
864 | ||
865 | /* XXX: remove that when string will be on top of the stack */ | |
866 | page_set_flags((int)argv[i], (int)(argv[i]+strlen(argv[i])), PROT_READ | PAGE_VALID); | |
867 | } | |
868 | ||
869 | DPRINTF("pushing argc %d \n", argc); | |
870 | stl(stack, argc); | |
871 | stack--; | |
872 | ||
873 | DPRINTF("pushing mh 0x%x \n", (int)mh); | |
874 | stl(stack, (int) mh); | |
875 | ||
876 | /* Stack points on the mh */ | |
877 | return (unsigned long)stack; | |
878 | } | |
879 | ||
880 | int mach_exec(const char * filename, char ** argv, char ** envp, | |
881 | struct target_pt_regs * regs) | |
882 | { | |
883 | int entrypoint, stack; | |
884 | void * mh; /* the Mach Header that will be used by dyld */ | |
885 | ||
886 | DPRINTF("mach_exec at 0x%x\n", (int)mach_exec); | |
887 | ||
888 | entrypoint = load_object(filename, regs, &mh); | |
889 | stack = setup_arg_pages(mh, argv, envp); | |
890 | #if defined(TARGET_I386) | |
891 | regs->eip = entrypoint; | |
892 | regs->esp = stack; | |
893 | #elif defined(TARGET_PPC) | |
894 | regs->nip = entrypoint; | |
895 | regs->gpr[1] = stack; | |
896 | #endif | |
897 | DPRINTF("mach_exec returns eip set to 0x%x esp 0x%x mh 0x%x\n", entrypoint, stack, (int)mh); | |
898 | ||
899 | if(!entrypoint) | |
900 | qerror("%s: no entry point!\n", filename); | |
901 | ||
902 | return 0; | |
903 | } |