macho.c revision e07cbb30f8a773e75d01d8b5aa05fb328974695e
1f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 2f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 3f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--- User-mode execve() for Mach-O executables m_ume_macho.c ---*/ 4f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 5f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 6f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 7f76d27a697a7b0bf3b84490baf60623fc96a23afnjn This file is part of Valgrind, a dynamic binary instrumentation 8f76d27a697a7b0bf3b84490baf60623fc96a23afnjn framework. 9f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 1003f8d3fc25f5a45c5826259d1b33b7f310117279sewardj Copyright (C) 2005-2012 Apple Inc. 11f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Greg Parker gparker@apple.com 12f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 13f76d27a697a7b0bf3b84490baf60623fc96a23afnjn This program is free software; you can redistribute it and/or 14f76d27a697a7b0bf3b84490baf60623fc96a23afnjn modify it under the terms of the GNU General Public License as 15f76d27a697a7b0bf3b84490baf60623fc96a23afnjn published by the Free Software Foundation; either version 2 of the 16f76d27a697a7b0bf3b84490baf60623fc96a23afnjn License, or (at your option) any later version. 17f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 18f76d27a697a7b0bf3b84490baf60623fc96a23afnjn This program is distributed in the hope that it will be useful, but 19f76d27a697a7b0bf3b84490baf60623fc96a23afnjn WITHOUT ANY WARRANTY; without even the implied warranty of 20f76d27a697a7b0bf3b84490baf60623fc96a23afnjn MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21f76d27a697a7b0bf3b84490baf60623fc96a23afnjn General Public License for more details. 22f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 23f76d27a697a7b0bf3b84490baf60623fc96a23afnjn You should have received a copy of the GNU General Public License 24f76d27a697a7b0bf3b84490baf60623fc96a23afnjn along with this program; if not, write to the Free Software 25f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 02111-1307, USA. 27f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 28f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The GNU General Public License is contained in the file COPYING. 29f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 30f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 318b68b64759254d514d98328c496cbd88cde4c9a5njn#if defined(VGO_darwin) 328b68b64759254d514d98328c496cbd88cde4c9a5njn 33f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_basics.h" 34f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_vki.h" 35f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 36f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_aspacemgr.h" // various mapping fns 37f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_debuglog.h" 38f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_libcassert.h" // VG_(exit), vg_assert 39f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_libcbase.h" // VG_(memcmp), etc 40f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_libcfile.h" // VG_(open) et al 41f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_libcprint.h" 42f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_libcproc.h" 43f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_machine.h" // VG_ELF_CLASS (XXX: which should be moved) 44f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_mallocfree.h" // VG_(malloc), VG_(free) 45f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_syscall.h" // VG_(strerror) 46f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "pub_core_ume.h" // self 47f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 48f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include "priv_ume.h" 49f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 50f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include <mach/mach.h> 51f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 52f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include <mach-o/dyld.h> 53f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include <mach-o/fat.h> 54f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#include <mach-o/loader.h> 55f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 56f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if VG_WORDSIZE == 4 57f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define MAGIC MH_MAGIC 58f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define MACH_HEADER mach_header 59f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define LC_SEGMENT_CMD LC_SEGMENT 60f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define SEGMENT_COMMAND segment_command 61f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define SECTION section 62f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#else 63f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define MAGIC MH_MAGIC_64 64f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define MACH_HEADER mach_header_64 65f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define LC_SEGMENT_CMD LC_SEGMENT_64 66f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define SEGMENT_COMMAND segment_command_64 67f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#define SECTION section_64 68f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 69f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 70f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 710af78adc02d94916ae0d31ffc02e40e3bea11877florianstatic void print(const HChar *str) 72f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 73f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(printf)("%s", str); 74f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 75f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 76e07cbb30f8a773e75d01d8b5aa05fb328974695eflorianstatic void check_mmap(SysRes res, Addr base, SizeT len, const HChar* who) 77f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 78f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res)) { 79ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(printf)("valgrind: mmap-FIXED(0x%llx, %lld) failed in UME (%s).\n", 80ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn (ULong)base, (Long)len, who); 81f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(exit)(1); 82f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 83f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 84f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 85bb5d4c6348b24ddec78725139c28010ea30bac92sewardj#if DARWIN_VERS == DARWIN_10_8 86e07cbb30f8a773e75d01d8b5aa05fb328974695eflorianstatic void check_mmap_float(SysRes res, SizeT len, const HChar* who) 87ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj{ 88ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (sr_isError(res)) { 89ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(printf)("valgrind: mmap-FLOAT(size=%lld) failed in UME (%s).\n", 90ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj (Long)len, who); 91ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(exit)(1); 92ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 93ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj} 94bb5d4c6348b24ddec78725139c28010ea30bac92sewardj#endif 95f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 96f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 97f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thin_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 980af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 99f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 100f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 101f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 102f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 103f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 1040af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 105f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 106f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 107f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 108f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 109f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_mach_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 1100af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 111f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 112f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 113f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 114f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 115f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* Open and map a dylinker file. 116f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 117f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename must be an absolute path. 118f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The dylinker's entry point is returned in *out_linker_entry. 119f76d27a697a7b0bf3b84490baf60623fc96a23afnjn */ 120f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 1210af78adc02d94916ae0d31ffc02e40e3bea11877florianopen_dylinker(const HChar *filename, vki_uint8_t **out_linker_entry) 122f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 123f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vg_stat sb; 124f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t filesize; 125f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 126f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int fd; 127f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 128f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 129f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filename[0] != '/') { 130f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (dylinker name is not an absolute path)\n"); 131f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 132f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 133f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 134f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(open)(filename, VKI_O_RDONLY, 0); 135f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd = sr_Res(res); 136f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res)) { 137f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't open dylinker: "); 138f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 139f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 140f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 141f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 142f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = VG_(fstat)(fd, &sb); 143f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 144f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't stat dylinker: "); 145f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 146f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 147f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(close)(fd); 148f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 149f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 150f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filesize = sb.size; 151f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 152f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_mach_file(fd, 0, filesize, MH_DYLINKER, filename, 153f76d27a697a7b0bf3b84490baf60623fc96a23afnjn NULL, NULL, NULL, out_linker_entry, NULL); 154f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 155f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("...while loading dylinker: "); 156f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 157f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 158f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 159f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(close)(fd); 160f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return err; 161f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 162f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 163f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 164f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 165f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Process an LC_SEGMENT command, mapping it into memory if appropriate. 166f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd[offset..size) is a Mach-O thin file. 167f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 168f76d27a697a7b0bf3b84490baf60623fc96a23afnjn If this segment contains the executable's Mach headers, their 169f76d27a697a7b0bf3b84490baf60623fc96a23afnjn loaded address is returned in *text. 170f76d27a697a7b0bf3b84490baf60623fc96a23afnjn If this segment is a __UNIXSTACK, its start address is returned in 171f76d27a697a7b0bf3b84490baf60623fc96a23afnjn *stack_start. 172f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 173f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 174f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_segment(int fd, vki_off_t offset, vki_off_t size, 175f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **text, vki_uint8_t **stack_start, 176f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct SEGMENT_COMMAND *segcmd, const HChar *filename) 177f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 178f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 179f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Addr addr; 180f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t filesize; // page-aligned 181f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t vmsize; // page-aligned 182f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int prot; 183f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 184f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme mark __UNIXSTACK as SF_STACK 185f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 186ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // Don't honour the client's request to map PAGEZERO. Why not? 187ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // Because when the kernel loaded the valgrind tool executable, 188ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // it will have mapped pagezero itself. So further attempts 189ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // to map it when loading the client are guaranteed to fail. 190ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn#if VG_WORDSIZE == 4 191ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn if (segcmd->vmaddr == 0 && 0 == VG_(strcmp)(segcmd->segname, SEG_PAGEZERO)) { 192ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn if (segcmd->vmsize != 0x1000) { 193ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn print("bad executable (__PAGEZERO is not 4 KB)\n"); 194ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn return -1; 195ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn } 196ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn return 0; 197ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn } 198ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn#endif 199f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if VG_WORDSIZE == 8 200f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmaddr == 0 && 0 == VG_(strcmp)(segcmd->segname, SEG_PAGEZERO)) { 201f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmsize != 0x100000000) { 202f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (__PAGEZERO is not 4 GB)\n"); 203f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 204f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 205f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 206f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 207f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 208f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 209f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Record the segment containing the Mach headers themselves 210f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->fileoff == 0 && segcmd->filesize != 0) { 211f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (text) *text = (vki_uint8_t *)segcmd->vmaddr; 212f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 213f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 214f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Record the __UNIXSTACK start 215f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (0 == VG_(strcmp)(segcmd->segname, SEG_UNIXSTACK)) { 216f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_start) *stack_start = (vki_uint8_t *)segcmd->vmaddr; 217f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 218f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 219f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Sanity-check the segment 220f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->fileoff + segcmd->filesize > size) { 221f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid segment command)\n"); 222f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 223f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 224f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmsize == 0) { 225f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; // nothing to map - ok 226f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 227f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 228f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Get desired memory protection 229f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme need maxprot too 230f76d27a697a7b0bf3b84490baf60623fc96a23afnjn prot = (((segcmd->initprot & VM_PROT_READ) ? VKI_PROT_READ : 0) | 231f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ((segcmd->initprot & VM_PROT_WRITE) ? VKI_PROT_WRITE : 0) | 232f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ((segcmd->initprot & VM_PROT_EXECUTE) ? VKI_PROT_EXEC : 0)); 233f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 234f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map the segment 235f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filesize = VG_PGROUNDUP(segcmd->filesize); 236f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vmsize = VG_PGROUNDUP(segcmd->vmsize); 237f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filesize > 0) { 238f76d27a697a7b0bf3b84490baf60623fc96a23afnjn addr = (Addr)segcmd->vmaddr; 239ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn VG_(debugLog)(2, "ume", "mmap fixed (file) (%#lx, %lu)\n", addr, filesize); 240f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_named_file_fixed_client)(addr, filesize, prot, fd, 241f76d27a697a7b0bf3b84490baf60623fc96a23afnjn offset + segcmd->fileoff, 242f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename); 243ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, addr, filesize, "load_segment1"); 244f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 245f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 246f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Zero-fill the remainder of the segment, if any 247f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->filesize != filesize) { 248f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // non-page-aligned part 249f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme kernel doesn't do this? 250f76d27a697a7b0bf3b84490baf60623fc96a23afnjn //bzero(segcmd->filesize+(vki_uint8_t *)addr, filesize-segcmd->filesize); 251f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 252f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filesize != vmsize) { 253f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // page-aligned part 254f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SizeT length = vmsize - filesize; 255f76d27a697a7b0bf3b84490baf60623fc96a23afnjn addr = (Addr)(filesize + segcmd->vmaddr); 256ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn VG_(debugLog)(2, "ume", "mmap fixed (anon) (%#lx, %lu)\n", addr, length); 257f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_anon_fixed_client)(addr, length, prot); 258ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, addr, length, "load_segment2"); 259f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 260f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 261f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 262f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 263f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 264f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 265f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 266f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Parse a LC_THREAD or LC_UNIXTHREAD command. 267f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Return 0 on success, -1 on any failure. 268f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack address is returned in *stack. If the executable requested 269f76d27a697a7b0bf3b84490baf60623fc96a23afnjn a non-default stack address, *customstack is set to TRUE. The thread's 270f76d27a697a7b0bf3b84490baf60623fc96a23afnjn entry point is returned in *entry. 271f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack itself (if any) is not mapped. 272f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Other custom register settings are silently ignored (GrP fixme). 273f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 274f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 275f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_genericthread(vki_uint8_t **stack_end, 276f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int *customstack, vki_uint8_t **entry, 277f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct thread_command *threadcmd) 278f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 279f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int flavor; 280f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int count; 281f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int *p; 282f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int left; 283f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 284f76d27a697a7b0bf3b84490baf60623fc96a23afnjn p = (unsigned int *)(threadcmd + 1); 285f76d27a697a7b0bf3b84490baf60623fc96a23afnjn left = (threadcmd->cmdsize - sizeof(struct thread_command)) / sizeof(*p); 286f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 287f76d27a697a7b0bf3b84490baf60623fc96a23afnjn while (left > 0) { 288f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (left < 2) { 289f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid thread command)\n"); 290f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 291f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 292f76d27a697a7b0bf3b84490baf60623fc96a23afnjn flavor = *p++; left--; 293f76d27a697a7b0bf3b84490baf60623fc96a23afnjn count = *p++; left--; 294f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 295f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (left < count) { 296f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid thread command 2)\n"); 297f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 298f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 299f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 300f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if defined(VGA_x86) 301f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (flavor == i386_THREAD_STATE && count == i386_THREAD_STATE_COUNT) { 302f76d27a697a7b0bf3b84490baf60623fc96a23afnjn i386_thread_state_t *state = (i386_thread_state_t *)p; 303f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (entry) *entry = (vki_uint8_t *)state->__eip; 304f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end) *stack_end = (vki_uint8_t *)(state->__esp ? state->__esp : VKI_USRSTACK); 305f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) *customstack = state->__esp; 306f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 307f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 308f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 309f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_amd64) 310f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (flavor == x86_THREAD_STATE64 && count == x86_THREAD_STATE64_COUNT){ 311f76d27a697a7b0bf3b84490baf60623fc96a23afnjn x86_thread_state64_t *state = (x86_thread_state64_t *)p; 312f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (entry) *entry = (vki_uint8_t *)state->__rip; 313f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end) *stack_end = (vki_uint8_t *)(state->__rsp ? state->__rsp : VKI_USRSTACK64); 314f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) *customstack = state->__rsp; 315f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 316f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 317f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 318f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#else 319f76d27a697a7b0bf3b84490baf60623fc96a23afnjn# error unknown platform 320f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 321f76d27a697a7b0bf3b84490baf60623fc96a23afnjn p += count; 322f76d27a697a7b0bf3b84490baf60623fc96a23afnjn left -= count; 323f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 324f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 325f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no arch-compatible thread state)\n"); 326f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 327f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 328f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 329f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 330f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* Returns the main stack size on this platform, 331f76d27a697a7b0bf3b84490baf60623fc96a23afnjn using getrlimit or a fixed size. 332f76d27a697a7b0bf3b84490baf60623fc96a23afnjn GrP fixme 64-bit? */ 333f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic vki_size_t default_stack_size(void) 334f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 335f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vki_rlimit lim; 336f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err = VG_(getrlimit)(VKI_RLIMIT_STACK, &lim); 337f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return 8*1024*1024; // 8 MB 338f76d27a697a7b0bf3b84490baf60623fc96a23afnjn else return lim.rlim_cur; 339f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 340f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 341f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 342f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 343f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Processes a LC_UNIXTHREAD command. 344f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 345f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack is mapped in and returned in *out_stack. 346f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The thread's entry point is returned in *out_entry. 347f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 348f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 349f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_unixthread(vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 350f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_entry, struct thread_command *threadcmd) 351f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 352f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 353f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end; 354f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int customstack; 355f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 356f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_genericthread(&stack_end, &customstack, out_entry, threadcmd); 357f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 358f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 359f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!stack_end) { 360f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no thread stack)\n"); 361f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 362f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 363f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 364f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!customstack) { 365f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map the stack 366f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t stacksize = VG_PGROUNDUP(default_stack_size()); 367f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vm_address_t stackbase = VG_PGROUNDDN(stack_end-stacksize); 368f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 369f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 370f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_anon_fixed_client)(stackbase, stacksize, VKI_PROT_READ|VKI_PROT_WRITE|VKI_PROT_EXEC); 371ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, stackbase, stacksize, "load_unixthread1"); 372f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_start) *out_stack_start = (vki_uint8_t *)stackbase; 373f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else { 374f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // custom stack - mapped via __UNIXTHREAD segment 375f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 376f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 377f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_end) *out_stack_end = stack_end; 378f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 379f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 380f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 381f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 382f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 383ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj/* Allocates a stack mapping at a V-chosen address. Pertains to 384ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj LC_MAIN commands, which seem to have appeared in OSX 10.8. 385ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 386ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj This is a really nasty hack -- allocates 64M+stack size, then 387ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj deallocates the 64M, to guarantee that the stack is at least 64M 388ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj above zero. */ 389bb5d4c6348b24ddec78725139c28010ea30bac92sewardj#if DARWIN_VERS == DARWIN_10_8 390ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardjstatic int 391ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardjhandle_lcmain ( vki_uint8_t **out_stack_start, 392ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vki_uint8_t **out_stack_end, 393ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vki_size_t requested_size ) 394ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj{ 395ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (requested_size == 0) { 396ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size = default_stack_size(); 397ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 398ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size = VG_PGROUNDUP(requested_size); 399ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 400ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj const vki_size_t HACK = 64 * 1024 * 1024; 401ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size += HACK; 402ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 403ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj SysRes res = VG_(am_mmap_anon_float_client)(requested_size, 404ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VKI_PROT_READ|VKI_PROT_WRITE|VKI_PROT_EXEC); 405ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj check_mmap_float(res, requested_size, "handle_lcmain"); 406ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vg_assert(!sr_isError(res)); 407ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj *out_stack_start = (vki_uint8_t*)sr_Res(res); 408ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj *out_stack_end = *out_stack_start + requested_size; 409ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 410ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj Bool need_discard = False; 411ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj res = VG_(am_munmap_client)(&need_discard, (Addr)*out_stack_start, HACK); 412ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (sr_isError(res)) return -1; 413ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vg_assert(!need_discard); // True == wtf? 414ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 415ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj *out_stack_start += HACK; 416ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 417ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj return 0; 418ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj} 419bb5d4c6348b24ddec78725139c28010ea30bac92sewardj#endif /* DARWIN_VERS == DARWIN_10_8 */ 420ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 421ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 422ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 423f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 424f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Processes an LC_LOAD_DYLINKER command. 425f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any error. 426f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The linker itself is mapped into memory. 427f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The linker's entry point is returned in *linker_entry. 428f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 429f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 430f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_dylinker(vki_uint8_t **linker_entry, struct dylinker_command *dycmd) 431f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 4320af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *name; 433f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 434f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (dycmd->name.offset >= dycmd->cmdsize) { 435f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid dylinker command)\n"); 436f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 437f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 438f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 4390af78adc02d94916ae0d31ffc02e40e3bea11877florian name = dycmd->name.offset + (HChar *)dycmd; 440f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 441f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme assumes name is terminated somewhere 442f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return open_dylinker(name, linker_entry); 443f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 444f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 445f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 446f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 447f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Process an LC_THREAD command. 448f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 449f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The thread's entry point is returned in *out_entry. 450f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 451f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 452f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thread(vki_uint8_t **out_entry, struct thread_command *threadcmd) 453f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 454f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int customstack; 455f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 456f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 457f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_genericthread(NULL, &customstack, out_entry, threadcmd); 458f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 459f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) { 460f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (stackless thread has stack)\n"); 461f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 462f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 463f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 464f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 465f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 466f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 467f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 468f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Loads a Mach-O executable into memory, along with any threads, 469f76d27a697a7b0bf3b84490baf60623fc96a23afnjn stacks, and dylinker. 470f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 471f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd[offset..offset+size) is a Mach-O thin file. 472f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filetype is MH_EXECUTE or MH_DYLINKER. 473f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The mapped but empty stack is returned in *out_stack. 474f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The executable's Mach headers are returned in *out_text. 475f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The executable's entry point is returned in *out_entry. 476f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The dylinker's entry point (if any) is returned in *out_linker_entry. 477f76d27a697a7b0bf3b84490baf60623fc96a23afnjn GrP fixme need to return whether dylinker was found - stack layout is different 478f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 479f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 480f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thin_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 4810af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 482f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 483f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 484f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 485ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(1, "ume", "load_thin_file: begin: %s\n", filename); 486f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct MACH_HEADER mh; 487f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *headers; 488f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *headers_end; 489f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct load_command *lc; 490f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct load_command *lcend; 491f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct SEGMENT_COMMAND *segcmd; 492f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct thread_command *threadcmd; 493f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct dylinker_command *dycmd; 494f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 495f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 496f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t len; 497f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 498f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_start = NULL; // allocated thread stack (hot end) 499f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end = NULL; // allocated thread stack (cold end) 500f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *entry = NULL; // static entry point 501f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *text = NULL; // start of text segment (i.e. the mach headers) 502f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *linker_entry = NULL; // dylinker entry point 503f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 504f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Read Mach-O header 505f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sizeof(mh) > size) { 506f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O header)\n"); 507f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 508f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &mh, sizeof(mh), offset); 509f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(mh)) { 510f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O header)\n"); 511f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 512f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 513f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 514f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 515f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Sanity-check the header itself 516f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (mh.magic != MAGIC) { 517f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 518f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 519f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 520f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 521f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (mh.filetype != filetype) { 522f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // expecting MH_EXECUTE or MH_DYLINKER 523f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (wrong file type)\n"); 524f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 525f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 526f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 527f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 528f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map all headers into memory 529f76d27a697a7b0bf3b84490baf60623fc96a23afnjn len = sizeof(mh) + mh.sizeofcmds; 530f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (len > size) { 531f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (missing load commands)\n"); 532f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 533f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 534f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 535f76d27a697a7b0bf3b84490baf60623fc96a23afnjn headers = VG_(malloc)("ume.macho.headers", len); 536f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, headers, len, offset); 537f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res)) { 538f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't read load commands from executable\n"); 539f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 540f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 5410788a3f459aa6ba9c956e471a41df8080fc34c7esewardj headers_end = headers + len; 542f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 543f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 544f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map some segments into client memory: 545f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // LC_SEGMENT (text, data, etc) 546f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // UNIXSTACK (stack) 547f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // LOAD_DYLINKER (dyld) 548f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lcend = (struct load_command *)(headers + mh.sizeofcmds + sizeof(mh)); 549f76d27a697a7b0bf3b84490baf60623fc96a23afnjn for (lc = (struct load_command *)(headers + sizeof(mh)); 550f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc < lcend; 551f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc = (struct load_command *)(lc->cmdsize + (vki_uint8_t *)lc)) 552f76d27a697a7b0bf3b84490baf60623fc96a23afnjn { 553f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if ((vki_uint8_t *)lc < headers || 554f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc->cmdsize+(vki_uint8_t *)lc > headers_end) { 555f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 556f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 557f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 558f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 559f76d27a697a7b0bf3b84490baf60623fc96a23afnjn switch (lc->cmd) { 560ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 561ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj#if DARWIN_VERS == DARWIN_10_8 562ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj case LC_MAIN: { /* New in 10.8 */ 563ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj struct entry_point_command* epcmd 564ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj = (struct entry_point_command*)lc; 565ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (stack_start || stack_end) { 566ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj print("bad executable (multiple indications of stack)"); 567ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj return -1; 568ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 569ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj err = handle_lcmain ( &stack_start, &stack_end, epcmd->stacksize ); 570ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (err) return -1; 571ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(2, "ume", "lc_main: created stack %p-%p\n", 572ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj stack_start, stack_end); 573ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj break; 574ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 575ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj# endif 576ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 577f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_SEGMENT_CMD: 578f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct SEGMENT_COMMAND)) { 579f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 580f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 581f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 582f76d27a697a7b0bf3b84490baf60623fc96a23afnjn segcmd = (struct SEGMENT_COMMAND *)lc; 583f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_segment(fd, offset, size, &text, &stack_start, 584f76d27a697a7b0bf3b84490baf60623fc96a23afnjn segcmd, filename); 585f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 586f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 587f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 588f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 589f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_UNIXTHREAD: 590f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end || entry) { 591f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple thread commands)\n"); 592f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 593f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 594f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct thread_command)) { 595f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 596f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 597f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 598f76d27a697a7b0bf3b84490baf60623fc96a23afnjn threadcmd = (struct thread_command *)lc; 599f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_unixthread(&stack_start, &stack_end, &entry, threadcmd); 600f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 601f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 602f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 603f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_LOAD_DYLINKER: 604f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_DYLINKER) { 605f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (dylinker needs a dylinker)\n"); 606f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 607f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 608f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (linker_entry) { 609f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple dylinker commands)\n"); 610f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 611f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct dylinker_command)) { 612f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 613f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 614f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 615f76d27a697a7b0bf3b84490baf60623fc96a23afnjn dycmd = (struct dylinker_command *)lc; 616f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_dylinker(&linker_entry, dycmd); 617f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 618f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 619f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 620f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_THREAD: 621f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_EXECUTE) { 622f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (stackless thread)\n"); 623f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 624f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 625f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end || entry) { 626f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple thread commands)\n"); 627f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 628f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 629f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct thread_command)) { 630f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 631f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 632f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 633f76d27a697a7b0bf3b84490baf60623fc96a23afnjn threadcmd = (struct thread_command *)lc; 634f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_thread(&entry, threadcmd); 635f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 636f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 637f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 638f76d27a697a7b0bf3b84490baf60623fc96a23afnjn default: 639f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 640f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 641f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 642f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 643f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 644f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Done with the headers 645f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(free)(headers); 646f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 647f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_EXECUTE) { 648f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Verify the necessary pieces for an executable: 649f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // a stack 650f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // a text segment 651f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // an entry point (static or linker) 652f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!stack_end || !stack_start) { 653ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(printf)("bad executable %s (no stack)\n", filename); 654f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 655f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 656f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!text) { 657f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no text segment)\n"); 658f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 659f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 660f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!entry && !linker_entry) { 661f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no entry point)\n"); 662f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 663f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 664f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 665f76d27a697a7b0bf3b84490baf60623fc96a23afnjn else if (filetype == MH_DYLINKER) { 666f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Verify the necessary pieces for a dylinker: 667f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // an entry point 668f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!entry) { 669f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no entry point)\n"); 670f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 671f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 672f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 673f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 674f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_start) *out_stack_start = stack_start; 675f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_end) *out_stack_end = stack_end; 676f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_text) *out_text = text; 677f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_entry) *out_entry = entry; 678f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_linker_entry) *out_linker_entry = linker_entry; 679f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 680ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(1, "ume", "load_thin_file: success: %s\n", filename); 681f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 682f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 683f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 684f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 685f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 686f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Load a fat Mach-O executable. 687f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 688f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 689f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 6900af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 691f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 692f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 693f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 694f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct fat_header fh; 695f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_off_t arch_offset; 696f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int i; 697f76d27a697a7b0bf3b84490baf60623fc96a23afnjn cpu_type_t good_arch; 698f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 699f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 700f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if defined(VGA_ppc32) 701f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_POWERPC; 702f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_ppc64) 703f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_POWERPC64; 704f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_x86) 705f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_I386; 706f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_amd64) 707f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_X86_64; 708f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#else 709f76d27a697a7b0bf3b84490baf60623fc96a23afnjn# error unknown architecture 710f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 711f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 712f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Read fat header 713f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // All fat contents are BIG-ENDIAN 714f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (size < sizeof(fh)) { 715f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad fat header)\n"); 716f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 717f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 718f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &fh, sizeof(fh), offset); 719f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(fh)) { 720f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad fat header)\n"); 721f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 722f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 723f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 724f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Scan arch headers looking for a good one 725f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch_offset = offset + sizeof(fh); 726f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fh.nfat_arch = VG_(ntohl)(fh.nfat_arch); 727f76d27a697a7b0bf3b84490baf60623fc96a23afnjn for (i = 0; i < fh.nfat_arch; i++) { 728f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct fat_arch arch; 729f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch_offset + sizeof(arch) > size) { 730f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (corrupt fat archs)\n"); 731f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 732f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 733f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 734f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &arch, sizeof(arch), arch_offset); 735f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch_offset += sizeof(arch); 736f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(arch)) { 737f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(printf)("bad executable (corrupt fat arch) %x %llu\n", 738f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cputype, (ULong)arch_offset); 739f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 740f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 741f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 742f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cputype = VG_(ntohl)(arch.cputype); 743f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cpusubtype = VG_(ntohl)(arch.cpusubtype); 744f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.offset = VG_(ntohl)(arch.offset); 745f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.size = VG_(ntohl)(arch.size); 746f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.align = VG_(ntohl)(arch.align); 747f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch.cputype == good_arch) { 748f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // use this arch 749f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch.offset > size || arch.offset + arch.size > size) { 750f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (corrupt fat arch 2)\n"); 751f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 752f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 753f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_mach_file(fd, offset+arch.offset, arch.size, filetype, 754f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename, out_stack_start, out_stack_end, 755f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 756f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 757f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 758f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 759f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (can't run on this machine)\n"); 760f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 761f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 762f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 763f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 764f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Load a Mach-O executable or dylinker. 765f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The file may be fat or thin. 766f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 767f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 768f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_mach_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 7690af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 770f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 771f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 772f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 773f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint32_t magic; 774f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 775f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 776f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (size < sizeof(magic)) { 777f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 778f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 779f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 780f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &magic, sizeof(magic), offset); 781f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(magic)) { 782f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 783f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 784f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 785f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 786f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (magic == MAGIC) { 787f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // thin 788f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_thin_file(fd, offset, size, filetype, filename, 789f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_stack_start, out_stack_end, 790f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 791f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else if (magic == VG_(htonl)(FAT_MAGIC)) { 792f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // fat 793f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_fat_file(fd, offset, size, filetype, filename, 794f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_stack_start, out_stack_end, 795f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 796f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else { 797f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // huh? 798f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad Mach-O magic)\n"); 799f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 800f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 801f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 802f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 803f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 8040af78adc02d94916ae0d31ffc02e40e3bea11877florianBool VG_(match_macho)(const void *hdr, Int len) 805f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 8060af78adc02d94916ae0d31ffc02e40e3bea11877florian const vki_uint32_t *magic = hdr; 807f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 808f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme check more carefully for matching fat arch? 809f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 810f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return (len >= VKI_PAGE_SIZE && 811f76d27a697a7b0bf3b84490baf60623fc96a23afnjn (*magic == MAGIC || *magic == VG_(ntohl)(FAT_MAGIC))) 812f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ? True : False; 813f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 814f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 815f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 816f76d27a697a7b0bf3b84490baf60623fc96a23afnjnInt VG_(load_macho)(Int fd, const HChar *name, ExeInfo *info) 817f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 818f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 819f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vg_stat sb; 820f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_start; 821f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end; 822f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *text; 823f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *entry; 824f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *linker_entry; 825f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 826f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = VG_(fstat)(fd, &sb); 827f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 828f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't stat executable\n"); 829f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return VKI_ENOEXEC; 830f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 831f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 832f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_mach_file(fd, 0, sb.size, MH_EXECUTE, name, 833f76d27a697a7b0bf3b84490baf60623fc96a23afnjn &stack_start, &stack_end, 834f76d27a697a7b0bf3b84490baf60623fc96a23afnjn &text, &entry, &linker_entry); 835f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return VKI_ENOEXEC; 836f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 837f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme exe_base 838f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme exe_end 839f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->entry = (Addr)entry; 840f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->init_ip = (Addr)(linker_entry ? linker_entry : entry); 841f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->brkbase = 0xffffffff; // GrP fixme hack 842f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->init_toc = 0; // GrP fixme unused 843f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 844f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->stack_start = (Addr)stack_start; 845f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->stack_end = (Addr)stack_end; 846f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->text = (Addr)text; 847f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->dynamic = linker_entry ? True : False; 848f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 849f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->executable_path = VG_(strdup)("ume.macho.executable_path", name); 850f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 851f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 852f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 853f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 8548b68b64759254d514d98328c496cbd88cde4c9a5njn#endif // defined(VGO_darwin) 855f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 856f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 857f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--- end ---*/ 858f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 859f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 860