--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/darwin-user/machload.c Fri Jul 31 15:01:17 2009 +0100
@@ -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;
+}