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