diff options
Diffstat (limited to 'darwin-user/machload.c')
| -rw-r--r-- | darwin-user/machload.c | 903 |
1 files changed, 903 insertions, 0 deletions
diff --git a/darwin-user/machload.c b/darwin-user/machload.c new file mode 100644 index 000000000..3ba417ed0 --- /dev/null +++ b/darwin-user/machload.c @@ -0,0 +1,903 @@ +/* + * Mach-O object file loading + * + * Copyright (c) 2006 Pierre d'Herbemont + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <stdio.h> +#include <sys/types.h> +#include <fcntl.h> +#include <sys/stat.h> +#include <errno.h> +#include <unistd.h> +#include <sys/mman.h> +#include <stdlib.h> +#include <string.h> + +#include "qemu.h" +#include "disas.h" + +#include <mach-o/loader.h> +#include <mach-o/fat.h> +#include <mach-o/nlist.h> +#include <mach-o/reloc.h> +#include <mach-o/ppc/reloc.h> + +//#define DEBUG_MACHLOAD + +#ifdef DEBUG_MACHLOAD +# define DPRINTF(...) do { if(loglevel) fprintf(logfile, __VA_ARGS__); printf(__VA_ARGS__); } while(0) +#else +# define DPRINTF(...) do { if(loglevel) fprintf(logfile, __VA_ARGS__); } while(0) +#endif + +# define check_mach_header(x) (x.magic == MH_CIGAM) + +extern const char *interp_prefix; + +/* we don't have a good implementation for this */ +#define DONT_USE_DYLD_SHARED_MAP + +/* Pass extra arg to DYLD for debug */ +//#define ACTIVATE_DYLD_TRACE + +//#define OVERRIDE_DYLINKER + +#ifdef OVERRIDE_DYLINKER +# ifdef TARGET_I386 +# define DYLINKER_NAME "/Users/steg/qemu/tests/i386-darwin-env/usr/lib/dyld" +# else +# define DYLINKER_NAME "/usr/lib/dyld" +# endif +#endif + +/* XXX: in an include */ +struct nlist_extended +{ + union { + char *n_name; + long n_strx; + } n_un; + unsigned char n_type; + unsigned char n_sect; + short st_desc; + unsigned long st_value; + unsigned long st_size; +}; + +/* Print symbols in gdb */ +void *macho_text_sect = 0; +int macho_offset = 0; + +int load_object(const char *filename, struct target_pt_regs * regs, void ** mh); +void qerror(const char *format, ...); +#ifdef TARGET_I386 +typedef struct mach_i386_thread_state { + unsigned int eax; + unsigned int ebx; + unsigned int ecx; + unsigned int edx; + unsigned int edi; + unsigned int esi; + unsigned int ebp; + unsigned int esp; + unsigned int ss; + unsigned int eflags; + unsigned int eip; + unsigned int cs; + unsigned int ds; + unsigned int es; + unsigned int fs; + unsigned int gs; +} mach_i386_thread_state_t; + +void bswap_i386_thread_state(struct mach_i386_thread_state *ts) +{ + bswap32s((uint32_t*)&ts->eax); + bswap32s((uint32_t*)&ts->ebx); + bswap32s((uint32_t*)&ts->ecx); + bswap32s((uint32_t*)&ts->edx); + bswap32s((uint32_t*)&ts->edi); + bswap32s((uint32_t*)&ts->esi); + bswap32s((uint32_t*)&ts->ebp); + bswap32s((uint32_t*)&ts->esp); + bswap32s((uint32_t*)&ts->ss); + bswap32s((uint32_t*)&ts->eflags); + bswap32s((uint32_t*)&ts->eip); + bswap32s((uint32_t*)&ts->cs); + bswap32s((uint32_t*)&ts->ds); + bswap32s((uint32_t*)&ts->es); + bswap32s((uint32_t*)&ts->fs); + bswap32s((uint32_t*)&ts->gs); +} +#define target_thread_state mach_i386_thread_state +#define TARGET_CPU_TYPE CPU_TYPE_I386 +#define TARGET_CPU_NAME "i386" +#endif + +#ifdef TARGET_PPC +struct mach_ppc_thread_state { + unsigned int srr0; /* Instruction address register (PC) */ + unsigned int srr1; /* Machine state register (supervisor) */ + unsigned int r0; + unsigned int r1; + unsigned int r2; + unsigned int r3; + unsigned int r4; + unsigned int r5; + unsigned int r6; + unsigned int r7; + unsigned int r8; + unsigned int r9; + unsigned int r10; + unsigned int r11; + unsigned int r12; + unsigned int r13; + unsigned int r14; + unsigned int r15; + unsigned int r16; + unsigned int r17; + unsigned int r18; + unsigned int r19; + unsigned int r20; + unsigned int r21; + unsigned int r22; + unsigned int r23; + unsigned int r24; + unsigned int r25; + unsigned int r26; + unsigned int r27; + unsigned int r28; + unsigned int r29; + unsigned int r30; + unsigned int r31; + + unsigned int cr; /* Condition register */ + unsigned int xer; /* User's integer exception register */ + unsigned int lr; /* Link register */ + unsigned int ctr; /* Count register */ + unsigned int mq; /* MQ register (601 only) */ + + unsigned int vrsave; /* Vector Save Register */ +}; + +void bswap_ppc_thread_state(struct mach_ppc_thread_state *ts) +{ + bswap32s((uint32_t*)&ts->srr0); + bswap32s((uint32_t*)&ts->srr1); + bswap32s((uint32_t*)&ts->r0); + bswap32s((uint32_t*)&ts->r1); + bswap32s((uint32_t*)&ts->r2); + bswap32s((uint32_t*)&ts->r3); + bswap32s((uint32_t*)&ts->r4); + bswap32s((uint32_t*)&ts->r5); + bswap32s((uint32_t*)&ts->r6); + bswap32s((uint32_t*)&ts->r7); + bswap32s((uint32_t*)&ts->r8); + bswap32s((uint32_t*)&ts->r9); + bswap32s((uint32_t*)&ts->r10); + bswap32s((uint32_t*)&ts->r11); + bswap32s((uint32_t*)&ts->r12); + bswap32s((uint32_t*)&ts->r13); + bswap32s((uint32_t*)&ts->r14); + bswap32s((uint32_t*)&ts->r15); + bswap32s((uint32_t*)&ts->r16); + bswap32s((uint32_t*)&ts->r17); + bswap32s((uint32_t*)&ts->r18); + bswap32s((uint32_t*)&ts->r19); + bswap32s((uint32_t*)&ts->r20); + bswap32s((uint32_t*)&ts->r21); + bswap32s((uint32_t*)&ts->r22); + bswap32s((uint32_t*)&ts->r23); + bswap32s((uint32_t*)&ts->r24); + bswap32s((uint32_t*)&ts->r25); + bswap32s((uint32_t*)&ts->r26); + bswap32s((uint32_t*)&ts->r27); + bswap32s((uint32_t*)&ts->r28); + bswap32s((uint32_t*)&ts->r29); + bswap32s((uint32_t*)&ts->r30); + bswap32s((uint32_t*)&ts->r31); + + bswap32s((uint32_t*)&ts->cr); + bswap32s((uint32_t*)&ts->xer); + bswap32s((uint32_t*)&ts->lr); + bswap32s((uint32_t*)&ts->ctr); + bswap32s((uint32_t*)&ts->mq); + + bswap32s((uint32_t*)&ts->vrsave); +} + +#define target_thread_state mach_ppc_thread_state +#define TARGET_CPU_TYPE CPU_TYPE_POWERPC +#define TARGET_CPU_NAME "PowerPC" +#endif + +struct target_thread_command { + unsigned long cmd; /* LC_THREAD or LC_UNIXTHREAD */ + unsigned long cmdsize; /* total size of this command */ + unsigned long flavor; /* flavor of thread state */ + unsigned long count; /* count of longs in thread state */ + struct target_thread_state state; /* thread state for this flavor */ +}; + +void bswap_tc(struct target_thread_command *tc) +{ + bswap32s((uint32_t*)(&tc->flavor)); + bswap32s((uint32_t*)&tc->count); +#if defined(TARGET_I386) + bswap_i386_thread_state(&tc->state); +#elif defined(TARGET_PPC) + bswap_ppc_thread_state(&tc->state); +#else +# error unknown TARGET_CPU_TYPE +#endif +} + +void bswap_mh(struct mach_header *mh) +{ + bswap32s((uint32_t*)(&mh->magic)); + bswap32s((uint32_t*)&mh->cputype); + bswap32s((uint32_t*)&mh->cpusubtype); + bswap32s((uint32_t*)&mh->filetype); + bswap32s((uint32_t*)&mh->ncmds); + bswap32s((uint32_t*)&mh->sizeofcmds); + bswap32s((uint32_t*)&mh->flags); +} + +void bswap_lc(struct load_command *lc) +{ + bswap32s((uint32_t*)&lc->cmd); + bswap32s((uint32_t*)&lc->cmdsize); +} + + +void bswap_fh(struct fat_header *fh) +{ + bswap32s((uint32_t*)&fh->magic); + bswap32s((uint32_t*)&fh->nfat_arch); +} + +void bswap_fa(struct fat_arch *fa) +{ + bswap32s((uint32_t*)&fa->cputype); + bswap32s((uint32_t*)&fa->cpusubtype); + bswap32s((uint32_t*)&fa->offset); + bswap32s((uint32_t*)&fa->size); + bswap32s((uint32_t*)&fa->align); +} + +void bswap_segcmd(struct segment_command *sc) +{ + bswap32s((uint32_t*)&sc->vmaddr); + bswap32s((uint32_t*)&sc->vmsize); + bswap32s((uint32_t*)&sc->fileoff); + bswap32s((uint32_t*)&sc->filesize); + bswap32s((uint32_t*)&sc->maxprot); + bswap32s((uint32_t*)&sc->initprot); + bswap32s((uint32_t*)&sc->nsects); + bswap32s((uint32_t*)&sc->flags); +} + +void bswap_symtabcmd(struct symtab_command *stc) +{ + bswap32s((uint32_t*)&stc->cmd); + bswap32s((uint32_t*)&stc->cmdsize); + bswap32s((uint32_t*)&stc->symoff); + bswap32s((uint32_t*)&stc->nsyms); + bswap32s((uint32_t*)&stc->stroff); + bswap32s((uint32_t*)&stc->strsize); +} + +void bswap_sym(struct nlist *n) +{ + bswap32s((uint32_t*)&n->n_un.n_strx); + bswap16s((uint16_t*)&n->n_desc); + bswap32s((uint32_t*)&n->n_value); +} + +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) +{ + int entry; + if(need_bswap) + bswap_tc(tc); +#if defined(TARGET_I386) + entry = tc->state.eip; + 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", + tc->state.eax, tc->state.ebx, tc->state.ecx, tc->state.edx, tc->state.edi, tc->state.esi, tc->state.ebp, + tc->state.esp, tc->state.ss, tc->state.eflags, tc->state.eip, tc->state.cs, tc->state.ds, tc->state.es, + tc->state.fs, tc->state.gs ); +#define reg_copy(reg) regs->reg = tc->state.reg + if(regs) + { + reg_copy(eax); + reg_copy(ebx); + reg_copy(ecx); + reg_copy(edx); + + reg_copy(edi); + reg_copy(esi); + + reg_copy(ebp); + reg_copy(esp); + + reg_copy(eflags); + reg_copy(eip); + /* + reg_copy(ss); + reg_copy(cs); + reg_copy(ds); + reg_copy(es); + reg_copy(fs); + reg_copy(gs);*/ + } +#undef reg_copy +#elif defined(TARGET_PPC) + entry = tc->state.srr0; +#endif + DPRINTF("load_thread: entry 0x%x\n", entry); + return entry; +} + +int load_dylinker(struct mach_header *mh, struct dylinker_command *dc, int fd, int mh_pos, int need_bswap) +{ + int size; + char * dylinker_name; + size = dc->cmdsize - sizeof(struct dylinker_command); + + if(need_bswap) + dylinker_name = (char*)(bswap_32(dc->name.offset)+(int)dc); + else + dylinker_name = (char*)((dc->name.offset)+(int)dc); + +#ifdef OVERRIDE_DYLINKER + dylinker_name = DYLINKER_NAME; +#else + if(asprintf(&dylinker_name, "%s%s", interp_prefix, dylinker_name) == -1) + qerror("can't allocate the new dylinker name\n"); +#endif + + DPRINTF("dylinker_name %s\n", dylinker_name); + return load_object(dylinker_name, NULL, NULL); +} + +int load_segment(struct mach_header *mh, struct segment_command *sc, int fd, int mh_pos, int need_bswap, int fixed, int slide) +{ + unsigned long addr = sc->vmaddr; + unsigned long size = sc->filesize; + unsigned long error = 0; + + if(need_bswap) + bswap_segcmd(sc); + + if(sc->vmaddr == 0) + { + DPRINTF("load_segment: sc->vmaddr == 0 returning\n"); + return -1; + } + + if (strcmp(sc->segname, "__PAGEZERO") == 0) + { + DPRINTF("load_segment: __PAGEZERO returning\n"); + return -1; + } + + /* Right now mmap memory */ + /* XXX: should check to see that the space is free, because MAP_FIXED is dangerous */ + DPRINTF("load_segment: mmaping %s to 0x%x-(0x%x|0x%x) + 0x%x\n", sc->segname, sc->vmaddr, sc->filesize, sc->vmsize, slide); + + if(sc->filesize > 0) + { + int opt = 0; + + if(fixed) + opt |= MAP_FIXED; + + DPRINTF("sc->vmaddr 0x%x slide 0x%x add 0x%x\n", slide, sc->vmaddr, sc->vmaddr+slide); + + addr = target_mmap(sc->vmaddr+slide, sc->filesize, sc->initprot, opt, fd, mh_pos + sc->fileoff); + + if(addr==-1) + qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); + + error = addr-sc->vmaddr; + } + else + { + addr = sc->vmaddr+slide; + error = slide; + } + + if(sc->vmsize > sc->filesize) + { + addr += sc->filesize; + size = sc->vmsize-sc->filesize; + addr = target_mmap(addr, size, sc->initprot, MAP_ANONYMOUS | MAP_FIXED, -1, 0); + if(addr==-1) + qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); + } + + return error; +} + +void *load_data(int fd, long offset, unsigned int size) +{ + char *data; + + data = malloc(size); + if (!data) + return NULL; + lseek(fd, offset, SEEK_SET); + if (read(fd, data, size) != size) { + free(data); + return NULL; + } + return data; +} + +/* load a mach-o object file */ +int load_object(const char *filename, struct target_pt_regs * regs, void ** mh) +{ + int need_bswap = 0; + int entry_point = 0; + int dyld_entry_point = 0; + int slide, mmapfixed; + int fd; + struct load_command *lcmds, *lc; + int is_fat = 0; + unsigned int i, magic; + int mach_hdr_pos = 0; + struct mach_header mach_hdr; + + /* for symbol lookup whith -d flag. */ + struct symtab_command * symtabcmd = 0; + struct nlist_extended *symtab, *sym; + struct nlist *symtab_std, *syment; + char *strtab; + + fd = open(filename, O_RDONLY); + if (fd < 0) + qerror("can't open file '%s'", filename); + + /* Read magic header. */ + if (read(fd, &magic, sizeof (magic)) != sizeof (magic)) + qerror("unable to read Magic of '%s'", filename); + + /* Check Mach identification. */ + if(magic == MH_MAGIC) + { + is_fat = 0; + need_bswap = 0; + } else if (magic == MH_CIGAM) + { + is_fat = 0; + need_bswap = 1; + } else if (magic == FAT_MAGIC) + { + is_fat = 1; + need_bswap = 0; + } else if (magic == FAT_CIGAM) + { + is_fat = 1; + need_bswap = 1; + } + else + qerror("Not a Mach-O file.", filename); + + DPRINTF("loading %s %s...\n", filename, is_fat ? "[FAT]": "[REGULAR]"); + if(is_fat) + { + int found = 0; + struct fat_header fh; + struct fat_arch *fa; + + lseek(fd, 0, SEEK_SET); + + /* Read Fat header. */ + if (read(fd, &fh, sizeof (fh)) != sizeof (fh)) + qerror("unable to read file header"); + + if(need_bswap) + bswap_fh(&fh); + + /* Read Fat Arch. */ + fa = malloc(sizeof(struct fat_arch)*fh.nfat_arch); + + if (read(fd, fa, sizeof(struct fat_arch)*fh.nfat_arch) != sizeof(struct fat_arch)*fh.nfat_arch) + qerror("unable to read file header"); + + for( i = 0; i < fh.nfat_arch; i++, fa++) + { + if(need_bswap) + bswap_fa(fa); + if(fa->cputype == TARGET_CPU_TYPE) + { + mach_hdr_pos = fa->offset; + lseek(fd, mach_hdr_pos, SEEK_SET); + + /* Read Mach header. */ + + if (read(fd, &mach_hdr, sizeof(struct mach_header)) != sizeof (struct mach_header)) + qerror("unable to read file header"); + + if(mach_hdr.magic == MH_MAGIC) + need_bswap = 0; + else if (mach_hdr.magic == MH_CIGAM) + need_bswap = 1; + else + qerror("Invalid mach header in Fat Mach-O File"); + found = 1; + break; + } + } + if(!found) + qerror("%s: No %s CPU found in FAT Header", filename, TARGET_CPU_NAME); + } + else + { + lseek(fd, 0, SEEK_SET); + /* Read Mach header */ + if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) + qerror("%s: unable to read file header", filename); + } + + if(need_bswap) + bswap_mh(&mach_hdr); + + if ((mach_hdr.cputype) != TARGET_CPU_TYPE) + qerror("%s: Unsupported CPU 0x%x (only 0x%x(%s) supported)", filename, mach_hdr.cputype, TARGET_CPU_TYPE, TARGET_CPU_NAME); + + + switch(mach_hdr.filetype) + { + case MH_EXECUTE: break; + case MH_FVMLIB: + case MH_DYLIB: + case MH_DYLINKER: break; + default: + qerror("%s: Unsupported Mach type (0x%x)", filename, mach_hdr.filetype); + } + + /* read segment headers */ + lcmds = malloc(mach_hdr.sizeofcmds); + + if(read(fd, lcmds, mach_hdr.sizeofcmds) != mach_hdr.sizeofcmds) + qerror("%s: unable to read load_command", filename); + slide = 0; + mmapfixed = 0; + for(i=0, lc = lcmds; i < (mach_hdr.ncmds) ; i++) + { + + if(need_bswap) + bswap_lc(lc); + switch(lc->cmd) + { + case LC_SEGMENT: + /* The main_exe can't be relocated */ + if(mach_hdr.filetype == MH_EXECUTE) + mmapfixed = 1; + + slide = load_segment(&mach_hdr, (struct segment_command*)lc, fd, mach_hdr_pos, need_bswap, mmapfixed, slide); + + /* other segment must be mapped according to slide exactly, if load_segment did something */ + if(slide != -1) + mmapfixed = 1; + else + slide = 0; /* load_segment didn't map the segment */ + + if(mach_hdr.filetype == MH_EXECUTE && slide != 0) + qerror("%s: Warning executable can't be mapped at the right address (offset: 0x%x)\n", filename, slide); + + if(strcmp(((struct segment_command*)(lc))->segname, "__TEXT") == 0) + { + /* Text section */ + if(mach_hdr.filetype == MH_EXECUTE) + { + /* return the mach_header */ + *mh = (void*)(((struct segment_command*)(lc))->vmaddr + slide); + } + else + { + /* it is dyld save the section for gdb, we will be interested in dyld symbol + while debuging */ + macho_text_sect = (void*)(((struct segment_command*)(lc))->vmaddr + slide); + macho_offset = slide; + } + } + break; + case LC_LOAD_DYLINKER: + dyld_entry_point = load_dylinker( &mach_hdr, (struct dylinker_command*)lc, fd, mach_hdr_pos, need_bswap ); + break; + case LC_LOAD_DYLIB: + /* dyld will do that for us */ + break; + case LC_THREAD: + case LC_UNIXTHREAD: + { + struct target_pt_regs * _regs; + if(mach_hdr.filetype == MH_DYLINKER) + _regs = regs; + else + _regs = 0; + entry_point = load_thread( &mach_hdr, (struct target_thread_command*)lc, _regs, fd, mach_hdr_pos, need_bswap ); + } + break; + case LC_SYMTAB: + /* Save the symtab and strtab */ + symtabcmd = (struct symtab_command *)lc; + break; + case LC_ID_DYLINKER: + case LC_ID_DYLIB: + case LC_UUID: + case LC_DYSYMTAB: + case LC_TWOLEVEL_HINTS: + case LC_PREBIND_CKSUM: + case LC_SUB_LIBRARY: + break; + default: fprintf(stderr, "warning: unkown command 0x%x in '%s'\n", lc->cmd, filename); + } + lc = (struct load_command*)((int)(lc)+(lc->cmdsize)); + } + + if(symtabcmd) + { + if(need_bswap) + bswap_symtabcmd(symtabcmd); + + symtab_std = load_data(fd, symtabcmd->symoff+mach_hdr_pos, symtabcmd->nsyms * sizeof(struct nlist)); + strtab = load_data(fd, symtabcmd->stroff+mach_hdr_pos, symtabcmd->strsize); + + symtab = malloc(sizeof(struct nlist_extended) * symtabcmd->nsyms); + + if(need_bswap) + { + for(i = 0, syment = symtab_std; i < symtabcmd->nsyms; i++, syment++) + bswap_sym(syment); + } + + for(i = 0, sym = symtab, syment = symtab_std; i < symtabcmd->nsyms; i++, sym++, syment++) + { + struct nlist *sym_follow, *sym_next = 0; + unsigned int j; + memset(sym, 0, sizeof(*sym)); + + sym->n_type = syment->n_type; + if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ + continue; + + memcpy(sym, syment, sizeof(*syment)); + + /* Find the following symbol in order to get the current symbol size */ + for(j = 0, sym_follow = symtab_std; j < symtabcmd->nsyms; j++, sym_follow++) { + if ( sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) + continue; + if(!sym_next) { + sym_next = sym_follow; + continue; + } + if(!(sym_next->n_value > sym_follow->n_value)) + continue; + sym_next = sym_follow; + } + if(sym_next) + sym->st_size = sym_next->n_value - sym->st_value; + else + sym->st_size = 10; /* XXX: text_sec_hdr->size + text_sec_hdr->offset - sym->st_value; */ + + sym->st_value += slide; + } + + free((void*)symtab_std); + + { + DPRINTF("saving symtab of %s (%d symbol(s))\n", filename, symtabcmd->nsyms); + struct syminfo *s; + s = malloc(sizeof(*s)); + s->disas_symtab = symtab; + s->disas_strtab = strtab; + s->disas_num_syms = symtabcmd->nsyms; + s->next = syminfos; + syminfos = s; + } + } + close(fd); + if(mach_hdr.filetype == MH_EXECUTE && dyld_entry_point) + return dyld_entry_point; + else + return entry_point+slide; +} + +extern unsigned long stack_size; + +unsigned long setup_arg_pages(void * mh, char ** argv, char ** env) +{ + unsigned long stack_base, error, size; + int i; + int * stack; + int argc, envc; + + /* Create enough stack to hold everything. If we don't use + * it for args, we'll use it for something else... + */ + size = stack_size; + + error = target_mmap(0, + size + qemu_host_page_size, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); + if (error == -1) + qerror("stk mmap"); + + /* we reserve one extra page at the top of the stack as guard */ + target_mprotect(error + size, qemu_host_page_size, PROT_NONE); + + stack_base = error + size; + stack = (void*)stack_base; +/* + * | STRING AREA | + * +-------------+ + * | 0 | +* +-------------+ + * | apple[n] | + * +-------------+ + * : + * +-------------+ + * | apple[0] | + * +-------------+ + * | 0 | + * +-------------+ + * | env[n] | + * +-------------+ + * : + * : + * +-------------+ + * | env[0] | + * +-------------+ + * | 0 | + * +-------------+ + * | arg[argc-1] | + * +-------------+ + * : + * : + * +-------------+ + * | arg[0] | + * +-------------+ + * | argc | + * +-------------+ + * sp-> | mh | address of where the a.out's file offset 0 is in memory + * +-------------+ +*/ + /* Construct the stack Stack grows down */ + stack--; + + /* XXX: string should go up there */ + + *stack = 0; + stack--; + + /* Push the absolute path of our executable */ + DPRINTF("pushing apple %s (0x%x)\n", (char*)argv[0], (int)argv[0]); + stl(stack, (int) argv[0]); + + stack--; + + stl(stack, 0); + stack--; + + /* Get envc */ + for(envc = 0; env[envc]; envc++); + + for(i = envc-1; i >= 0; i--) + { + DPRINTF("pushing env %s (0x%x)\n", (char*)env[i], (int)env[i]); + stl(stack, (int)env[i]); + stack--; + + /* XXX: remove that when string will be on top of the stack */ + page_set_flags((int)env[i], (int)(env[i]+strlen(env[i])), PROT_READ | PAGE_VALID); + } + + /* Add on the stack the interp_prefix choosen if so */ + if(interp_prefix[0]) + { + char *dyld_root; + asprintf(&dyld_root, "DYLD_ROOT_PATH=%s", interp_prefix); + page_set_flags((int)dyld_root, (int)(dyld_root+strlen(interp_prefix)+1), PROT_READ | PAGE_VALID); + + stl(stack, (int)dyld_root); + stack--; + } + +#ifdef DONT_USE_DYLD_SHARED_MAP + { + char *shared_map_mode; + asprintf(&shared_map_mode, "DYLD_SHARED_REGION=avoid"); + page_set_flags((int)shared_map_mode, (int)(shared_map_mode+strlen(shared_map_mode)+1), PROT_READ | PAGE_VALID); + + stl(stack, (int)shared_map_mode); + stack--; + } +#endif + +#ifdef ACTIVATE_DYLD_TRACE + char * extra_env_static[] = {"DYLD_DEBUG_TRACE=yes", + "DYLD_PREBIND_DEBUG=3", "DYLD_UNKNOW_TRACE=yes", + "DYLD_PRINT_INITIALIZERS=yes", + "DYLD_PRINT_SEGMENTS=yes", "DYLD_PRINT_REBASINGS=yes", "DYLD_PRINT_BINDINGS=yes", "DYLD_PRINT_INITIALIZERS=yes", "DYLD_PRINT_WARNINGS=yes" }; + + char ** extra_env = malloc(sizeof(extra_env_static)); + bcopy(extra_env_static, extra_env, sizeof(extra_env_static)); + page_set_flags((int)extra_env, (int)((void*)extra_env+sizeof(extra_env_static)), PROT_READ | PAGE_VALID); + + for(i = 0; i<9; i++) + { + DPRINTF("pushing (extra) env %s (0x%x)\n", (char*)extra_env[i], (int)extra_env[i]); + stl(stack, (int) extra_env[i]); + stack--; + } +#endif + + stl(stack, 0); + stack--; + + /* Get argc */ + for(argc = 0; argv[argc]; argc++); + + for(i = argc-1; i >= 0; i--) + { + DPRINTF("pushing arg %s (0x%x)\n", (char*)argv[i], (int)argv[i]); + stl(stack, (int) argv[i]); + stack--; + + /* XXX: remove that when string will be on top of the stack */ + page_set_flags((int)argv[i], (int)(argv[i]+strlen(argv[i])), PROT_READ | PAGE_VALID); + } + + DPRINTF("pushing argc %d \n", argc); + stl(stack, argc); + stack--; + + DPRINTF("pushing mh 0x%x \n", (int)mh); + stl(stack, (int) mh); + + /* Stack points on the mh */ + return (unsigned long)stack; +} + +int mach_exec(const char * filename, char ** argv, char ** envp, + struct target_pt_regs * regs) +{ + int entrypoint, stack; + void * mh; /* the Mach Header that will be used by dyld */ + + DPRINTF("mach_exec at 0x%x\n", (int)mach_exec); + + entrypoint = load_object(filename, regs, &mh); + stack = setup_arg_pages(mh, argv, envp); +#if defined(TARGET_I386) + regs->eip = entrypoint; + regs->esp = stack; +#elif defined(TARGET_PPC) + regs->nip = entrypoint; + regs->gpr[1] = stack; +#endif + DPRINTF("mach_exec returns eip set to 0x%x esp 0x%x mh 0x%x\n", entrypoint, stack, (int)mh); + + if(!entrypoint) + qerror("%s: no entry point!\n", filename); + + return 0; +} |