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 10b3a1e4bffbdbbf38304f216af405009868f43628sewardj Copyright (C) 2005-2015 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)) { 79f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd VG_(printf)("valgrind: mmap-FIXED(0x%llx, %lld) failed in UME (%s) " 80f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd "with error %lu (%s).\n", 81f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd (ULong)base, (Long)len, who, 82f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd sr_Err(res), VG_(strerror)(sr_Err(res)) ); 83f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(exit)(1); 84f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 85f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 86f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 87ec66ad5f33a4d904b1f728935ec6ee29b58a55ecsewardj#if DARWIN_VERS >= DARWIN_10_8 88e07cbb30f8a773e75d01d8b5aa05fb328974695eflorianstatic void check_mmap_float(SysRes res, SizeT len, const HChar* who) 89ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj{ 90ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (sr_isError(res)) { 91f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd VG_(printf)("valgrind: mmap-FLOAT(size=%lld) failed in UME (%s) " 92f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd "with error %lu (%s).\n", 93f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd (Long)len, who, 94f0c855fac3f394b3fad9c0d15d86381b4073e164rhyskidd sr_Err(res), VG_(strerror)(sr_Err(res)) ); 95ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(exit)(1); 96ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 97ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj} 98bb5d4c6348b24ddec78725139c28010ea30bac92sewardj#endif 99f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 100f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 101f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thin_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 1020af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 103f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 104f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 105f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 106f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 107f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 1080af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 109f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 110f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 111f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 112f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 113f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_mach_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 1140af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 115f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 116f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry); 117f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 118f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 119f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* Open and map a dylinker file. 120f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 121f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename must be an absolute path. 122f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The dylinker's entry point is returned in *out_linker_entry. 123f76d27a697a7b0bf3b84490baf60623fc96a23afnjn */ 124f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 1250af78adc02d94916ae0d31ffc02e40e3bea11877florianopen_dylinker(const HChar *filename, vki_uint8_t **out_linker_entry) 126f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 127f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vg_stat sb; 128f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t filesize; 129f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 130f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int fd; 131f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 132f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 133f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filename[0] != '/') { 134f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (dylinker name is not an absolute path)\n"); 135f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 136f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 137f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 138f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(open)(filename, VKI_O_RDONLY, 0); 139f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd = sr_Res(res); 140f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res)) { 141f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't open dylinker: "); 142f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 143f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 144f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 145f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 146f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = VG_(fstat)(fd, &sb); 147f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 148f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't stat dylinker: "); 149f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 150f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 151f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(close)(fd); 152f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 153f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 154f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filesize = sb.size; 155f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 156f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_mach_file(fd, 0, filesize, MH_DYLINKER, filename, 157f76d27a697a7b0bf3b84490baf60623fc96a23afnjn NULL, NULL, NULL, out_linker_entry, NULL); 158f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 159f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("...while loading dylinker: "); 160f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print(filename); 161f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("\n"); 162f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 163f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(close)(fd); 164f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return err; 165f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 166f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 167f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 168f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 169f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Process an LC_SEGMENT command, mapping it into memory if appropriate. 170f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd[offset..size) is a Mach-O thin file. 171f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 172f76d27a697a7b0bf3b84490baf60623fc96a23afnjn If this segment contains the executable's Mach headers, their 173f76d27a697a7b0bf3b84490baf60623fc96a23afnjn loaded address is returned in *text. 174f76d27a697a7b0bf3b84490baf60623fc96a23afnjn If this segment is a __UNIXSTACK, its start address is returned in 175f76d27a697a7b0bf3b84490baf60623fc96a23afnjn *stack_start. 176f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 177f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 178f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_segment(int fd, vki_off_t offset, vki_off_t size, 179f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **text, vki_uint8_t **stack_start, 180f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct SEGMENT_COMMAND *segcmd, const HChar *filename) 181f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 182f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 183f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Addr addr; 184f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t filesize; // page-aligned 185f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t vmsize; // page-aligned 186f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int prot; 187f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 188f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme mark __UNIXSTACK as SF_STACK 189f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 190ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // Don't honour the client's request to map PAGEZERO. Why not? 191ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // Because when the kernel loaded the valgrind tool executable, 192ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // it will have mapped pagezero itself. So further attempts 193ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn // to map it when loading the client are guaranteed to fail. 194ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn#if VG_WORDSIZE == 4 195ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn if (segcmd->vmaddr == 0 && 0 == VG_(strcmp)(segcmd->segname, SEG_PAGEZERO)) { 196ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn if (segcmd->vmsize != 0x1000) { 197ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn print("bad executable (__PAGEZERO is not 4 KB)\n"); 198ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn return -1; 199ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn } 200ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn return 0; 201ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn } 202ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn#endif 203f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if VG_WORDSIZE == 8 204f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmaddr == 0 && 0 == VG_(strcmp)(segcmd->segname, SEG_PAGEZERO)) { 205f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmsize != 0x100000000) { 206f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (__PAGEZERO is not 4 GB)\n"); 207f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 208f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 209f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 210f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 211f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 212f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 213f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Record the segment containing the Mach headers themselves 214f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->fileoff == 0 && segcmd->filesize != 0) { 215f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (text) *text = (vki_uint8_t *)segcmd->vmaddr; 216f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 217f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 218f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Record the __UNIXSTACK start 219f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (0 == VG_(strcmp)(segcmd->segname, SEG_UNIXSTACK)) { 220f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_start) *stack_start = (vki_uint8_t *)segcmd->vmaddr; 221f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 222f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 223f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Sanity-check the segment 224f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->fileoff + segcmd->filesize > size) { 225f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid segment command)\n"); 226f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 227f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 228f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->vmsize == 0) { 229f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; // nothing to map - ok 230f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 231f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 232f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Get desired memory protection 233f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme need maxprot too 234f76d27a697a7b0bf3b84490baf60623fc96a23afnjn prot = (((segcmd->initprot & VM_PROT_READ) ? VKI_PROT_READ : 0) | 235f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ((segcmd->initprot & VM_PROT_WRITE) ? VKI_PROT_WRITE : 0) | 236f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ((segcmd->initprot & VM_PROT_EXECUTE) ? VKI_PROT_EXEC : 0)); 237f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 238f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map the segment 239f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filesize = VG_PGROUNDUP(segcmd->filesize); 240f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vmsize = VG_PGROUNDUP(segcmd->vmsize); 241f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filesize > 0) { 242f76d27a697a7b0bf3b84490baf60623fc96a23afnjn addr = (Addr)segcmd->vmaddr; 243ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn VG_(debugLog)(2, "ume", "mmap fixed (file) (%#lx, %lu)\n", addr, filesize); 244f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_named_file_fixed_client)(addr, filesize, prot, fd, 245f76d27a697a7b0bf3b84490baf60623fc96a23afnjn offset + segcmd->fileoff, 246f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename); 247ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, addr, filesize, "load_segment1"); 248f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 249f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 250f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Zero-fill the remainder of the segment, if any 251f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (segcmd->filesize != filesize) { 252f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // non-page-aligned part 253f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme kernel doesn't do this? 254f76d27a697a7b0bf3b84490baf60623fc96a23afnjn //bzero(segcmd->filesize+(vki_uint8_t *)addr, filesize-segcmd->filesize); 255f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 256f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filesize != vmsize) { 257f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // page-aligned part 258f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SizeT length = vmsize - filesize; 259f76d27a697a7b0bf3b84490baf60623fc96a23afnjn addr = (Addr)(filesize + segcmd->vmaddr); 260ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn VG_(debugLog)(2, "ume", "mmap fixed (anon) (%#lx, %lu)\n", addr, length); 261f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_anon_fixed_client)(addr, length, prot); 262ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, addr, length, "load_segment2"); 263f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 264f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 265f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 266f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 267f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 268f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 269f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 270f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Parse a LC_THREAD or LC_UNIXTHREAD command. 271f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Return 0 on success, -1 on any failure. 272f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack address is returned in *stack. If the executable requested 273f76d27a697a7b0bf3b84490baf60623fc96a23afnjn a non-default stack address, *customstack is set to TRUE. The thread's 274f76d27a697a7b0bf3b84490baf60623fc96a23afnjn entry point is returned in *entry. 275f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack itself (if any) is not mapped. 276f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Other custom register settings are silently ignored (GrP fixme). 277f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 278f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 279f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_genericthread(vki_uint8_t **stack_end, 280f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int *customstack, vki_uint8_t **entry, 281f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct thread_command *threadcmd) 282f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 283f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int flavor; 284f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int count; 285f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int *p; 286f76d27a697a7b0bf3b84490baf60623fc96a23afnjn unsigned int left; 287f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 288f76d27a697a7b0bf3b84490baf60623fc96a23afnjn p = (unsigned int *)(threadcmd + 1); 289f76d27a697a7b0bf3b84490baf60623fc96a23afnjn left = (threadcmd->cmdsize - sizeof(struct thread_command)) / sizeof(*p); 290f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 291f76d27a697a7b0bf3b84490baf60623fc96a23afnjn while (left > 0) { 292f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (left < 2) { 293f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid thread command)\n"); 294f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 295f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 296f76d27a697a7b0bf3b84490baf60623fc96a23afnjn flavor = *p++; left--; 297f76d27a697a7b0bf3b84490baf60623fc96a23afnjn count = *p++; left--; 298f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 299f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (left < count) { 300f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid thread command 2)\n"); 301f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 302f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 303f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 304f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if defined(VGA_x86) 305f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (flavor == i386_THREAD_STATE && count == i386_THREAD_STATE_COUNT) { 306f76d27a697a7b0bf3b84490baf60623fc96a23afnjn i386_thread_state_t *state = (i386_thread_state_t *)p; 307f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (entry) *entry = (vki_uint8_t *)state->__eip; 3086b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj if (stack_end) { 3096b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj *stack_end = (vki_uint8_t *)(state->__esp ? state->__esp 3106b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj : VKI_USRSTACK); 3116b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj vg_assert(VG_IS_PAGE_ALIGNED(*stack_end)); 3126b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj (*stack_end)--; 3136b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj } 314f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) *customstack = state->__esp; 315f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 316f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 317f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 318f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_amd64) 319f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (flavor == x86_THREAD_STATE64 && count == x86_THREAD_STATE64_COUNT){ 320f76d27a697a7b0bf3b84490baf60623fc96a23afnjn x86_thread_state64_t *state = (x86_thread_state64_t *)p; 321f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (entry) *entry = (vki_uint8_t *)state->__rip; 3226b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj if (stack_end) { 3236b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj *stack_end = (vki_uint8_t *)(state->__rsp ? state->__rsp 3246b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj : VKI_USRSTACK64); 3256b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj vg_assert(VG_IS_PAGE_ALIGNED(*stack_end)); 3266b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj (*stack_end)--; 3276b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj } 328f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) *customstack = state->__rsp; 329f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 330f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 331f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 332f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#else 333f76d27a697a7b0bf3b84490baf60623fc96a23afnjn# error unknown platform 334f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 335f76d27a697a7b0bf3b84490baf60623fc96a23afnjn p += count; 336f76d27a697a7b0bf3b84490baf60623fc96a23afnjn left -= count; 337f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 338f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 339f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no arch-compatible thread state)\n"); 340f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 341f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 342f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 343f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 344f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* Returns the main stack size on this platform, 345f76d27a697a7b0bf3b84490baf60623fc96a23afnjn using getrlimit or a fixed size. 346f76d27a697a7b0bf3b84490baf60623fc96a23afnjn GrP fixme 64-bit? */ 347f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic vki_size_t default_stack_size(void) 348f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 349f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vki_rlimit lim; 350f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err = VG_(getrlimit)(VKI_RLIMIT_STACK, &lim); 351f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return 8*1024*1024; // 8 MB 352f76d27a697a7b0bf3b84490baf60623fc96a23afnjn else return lim.rlim_cur; 353f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 354f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 355f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 356f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 357f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Processes a LC_UNIXTHREAD command. 358f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 359f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The stack is mapped in and returned in *out_stack. 360f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The thread's entry point is returned in *out_entry. 361f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 362f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 363f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_unixthread(vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 364f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_entry, struct thread_command *threadcmd) 365f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 366f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 367f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end; 368f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int customstack; 369f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 370f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_genericthread(&stack_end, &customstack, out_entry, threadcmd); 371f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 372f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 373f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!stack_end) { 374f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no thread stack)\n"); 375f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 376f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 377f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 378f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!customstack) { 379f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map the stack 380f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t stacksize = VG_PGROUNDUP(default_stack_size()); 3816b0cdb0b5afd8ddbdbc7ef87d733fc0b8c7c0fb1sewardj vm_address_t stackbase = VG_PGROUNDDN(stack_end+1-stacksize); 382f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 383f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 384f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(am_mmap_anon_fixed_client)(stackbase, stacksize, VKI_PROT_READ|VKI_PROT_WRITE|VKI_PROT_EXEC); 385ea2d6fd6aaf98d261df9fdf580542ebf01b7fba4njn check_mmap(res, stackbase, stacksize, "load_unixthread1"); 386f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_start) *out_stack_start = (vki_uint8_t *)stackbase; 387f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else { 388f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // custom stack - mapped via __UNIXTHREAD segment 389f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 390f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 391f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_end) *out_stack_end = stack_end; 392f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 393f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 394f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 395f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 396f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 397ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj/* Allocates a stack mapping at a V-chosen address. Pertains to 398ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj LC_MAIN commands, which seem to have appeared in OSX 10.8. 399ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 400ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj This is a really nasty hack -- allocates 64M+stack size, then 401ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj deallocates the 64M, to guarantee that the stack is at least 64M 402ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj above zero. */ 403ec66ad5f33a4d904b1f728935ec6ee29b58a55ecsewardj#if DARWIN_VERS >= DARWIN_10_8 404ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardjstatic int 405ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardjhandle_lcmain ( vki_uint8_t **out_stack_start, 406ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vki_uint8_t **out_stack_end, 407ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vki_size_t requested_size ) 408ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj{ 409ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (requested_size == 0) { 410ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size = default_stack_size(); 411ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 412ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size = VG_PGROUNDUP(requested_size); 413ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 414ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj const vki_size_t HACK = 64 * 1024 * 1024; 415ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj requested_size += HACK; 416ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 417ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj SysRes res = VG_(am_mmap_anon_float_client)(requested_size, 418ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VKI_PROT_READ|VKI_PROT_WRITE|VKI_PROT_EXEC); 419ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj check_mmap_float(res, requested_size, "handle_lcmain"); 420ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vg_assert(!sr_isError(res)); 421ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj *out_stack_start = (vki_uint8_t*)sr_Res(res); 422b7dfa58bd482b84b58df5459c7fb427b94ba99a7sewardj *out_stack_end = *out_stack_start + requested_size - 1; 423ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 424ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj Bool need_discard = False; 425ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj res = VG_(am_munmap_client)(&need_discard, (Addr)*out_stack_start, HACK); 426ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (sr_isError(res)) return -1; 427ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj vg_assert(!need_discard); // True == wtf? 428ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 429ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj *out_stack_start += HACK; 430ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 431ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj return 0; 432ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj} 433ec66ad5f33a4d904b1f728935ec6ee29b58a55ecsewardj#endif /* DARWIN_VERS >= DARWIN_10_8 */ 434ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 435ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 436ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 437f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 438f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Processes an LC_LOAD_DYLINKER command. 439f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any error. 440f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The linker itself is mapped into memory. 441f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The linker's entry point is returned in *linker_entry. 442f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 443f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 444f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_dylinker(vki_uint8_t **linker_entry, struct dylinker_command *dycmd) 445f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 4460af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *name; 447f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 448f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (dycmd->name.offset >= dycmd->cmdsize) { 449f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid dylinker command)\n"); 450f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 451f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 452f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 4530af78adc02d94916ae0d31ffc02e40e3bea11877florian name = dycmd->name.offset + (HChar *)dycmd; 454f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 455f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme assumes name is terminated somewhere 456f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return open_dylinker(name, linker_entry); 457f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 458f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 459f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 460f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 461f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Process an LC_THREAD command. 462f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 463f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The thread's entry point is returned in *out_entry. 464f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 465f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 466f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thread(vki_uint8_t **out_entry, struct thread_command *threadcmd) 467f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 468f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int customstack; 469f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 470f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 471f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_genericthread(NULL, &customstack, out_entry, threadcmd); 472f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 473f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (customstack) { 474f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (stackless thread has stack)\n"); 475f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 476f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 477f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 478f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 479f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 480f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 481f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 482f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Loads a Mach-O executable into memory, along with any threads, 483f76d27a697a7b0bf3b84490baf60623fc96a23afnjn stacks, and dylinker. 484f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Returns 0 on success, -1 on any failure. 485f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fd[offset..offset+size) is a Mach-O thin file. 486f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filetype is MH_EXECUTE or MH_DYLINKER. 487f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The mapped but empty stack is returned in *out_stack. 488f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The executable's Mach headers are returned in *out_text. 489f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The executable's entry point is returned in *out_entry. 490f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The dylinker's entry point (if any) is returned in *out_linker_entry. 491f76d27a697a7b0bf3b84490baf60623fc96a23afnjn GrP fixme need to return whether dylinker was found - stack layout is different 492f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 493f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 494f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_thin_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 4950af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 496f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 497f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 498f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 499ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(1, "ume", "load_thin_file: begin: %s\n", filename); 500f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct MACH_HEADER mh; 501f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *headers; 502f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *headers_end; 503f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct load_command *lc; 504f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct load_command *lcend; 505f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct SEGMENT_COMMAND *segcmd; 506f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct thread_command *threadcmd; 507f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct dylinker_command *dycmd; 508f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 509f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 510f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_size_t len; 511f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 512f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_start = NULL; // allocated thread stack (hot end) 513f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end = NULL; // allocated thread stack (cold end) 514f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *entry = NULL; // static entry point 515f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *text = NULL; // start of text segment (i.e. the mach headers) 516f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *linker_entry = NULL; // dylinker entry point 517f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 518f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Read Mach-O header 519f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sizeof(mh) > size) { 520f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O header)\n"); 521f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 522f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &mh, sizeof(mh), offset); 523f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(mh)) { 524f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O header)\n"); 525f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 526f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 527f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 528f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 529f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Sanity-check the header itself 530f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (mh.magic != MAGIC) { 531f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 532f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 533f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 534f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 535f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (mh.filetype != filetype) { 536f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // expecting MH_EXECUTE or MH_DYLINKER 537f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (wrong file type)\n"); 538f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 539f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 540f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 541f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 542f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map all headers into memory 543f76d27a697a7b0bf3b84490baf60623fc96a23afnjn len = sizeof(mh) + mh.sizeofcmds; 544f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (len > size) { 545f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (missing load commands)\n"); 546f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 547f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 548f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 549f76d27a697a7b0bf3b84490baf60623fc96a23afnjn headers = VG_(malloc)("ume.macho.headers", len); 550f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, headers, len, offset); 551f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res)) { 552f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't read load commands from executable\n"); 553f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 554f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 5550788a3f459aa6ba9c956e471a41df8080fc34c7esewardj headers_end = headers + len; 556f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 557f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 558f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Map some segments into client memory: 559f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // LC_SEGMENT (text, data, etc) 560f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // UNIXSTACK (stack) 561f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // LOAD_DYLINKER (dyld) 562f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lcend = (struct load_command *)(headers + mh.sizeofcmds + sizeof(mh)); 563f76d27a697a7b0bf3b84490baf60623fc96a23afnjn for (lc = (struct load_command *)(headers + sizeof(mh)); 564f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc < lcend; 565f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc = (struct load_command *)(lc->cmdsize + (vki_uint8_t *)lc)) 566f76d27a697a7b0bf3b84490baf60623fc96a23afnjn { 567f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if ((vki_uint8_t *)lc < headers || 568f76d27a697a7b0bf3b84490baf60623fc96a23afnjn lc->cmdsize+(vki_uint8_t *)lc > headers_end) { 569f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 570f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 571f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 572f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 573f76d27a697a7b0bf3b84490baf60623fc96a23afnjn switch (lc->cmd) { 574ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 575ec66ad5f33a4d904b1f728935ec6ee29b58a55ecsewardj#if DARWIN_VERS >= DARWIN_10_8 576ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj case LC_MAIN: { /* New in 10.8 */ 577ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj struct entry_point_command* epcmd 578ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj = (struct entry_point_command*)lc; 579ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (stack_start || stack_end) { 580ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj print("bad executable (multiple indications of stack)"); 581ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj return -1; 582ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 583ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj err = handle_lcmain ( &stack_start, &stack_end, epcmd->stacksize ); 584ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj if (err) return -1; 585ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(2, "ume", "lc_main: created stack %p-%p\n", 586ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj stack_start, stack_end); 587ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj break; 588ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj } 589ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj# endif 590ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj 591f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_SEGMENT_CMD: 592f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct SEGMENT_COMMAND)) { 593f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 594f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 595f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 596f76d27a697a7b0bf3b84490baf60623fc96a23afnjn segcmd = (struct SEGMENT_COMMAND *)lc; 597f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_segment(fd, offset, size, &text, &stack_start, 598f76d27a697a7b0bf3b84490baf60623fc96a23afnjn segcmd, filename); 599f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 600f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 601f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 602f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 603f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_UNIXTHREAD: 604f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end || entry) { 605f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple thread commands)\n"); 606f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 607f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 608f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct thread_command)) { 609f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 610f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 611f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 612f76d27a697a7b0bf3b84490baf60623fc96a23afnjn threadcmd = (struct thread_command *)lc; 613f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_unixthread(&stack_start, &stack_end, &entry, threadcmd); 614f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 615f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 616f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 617f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_LOAD_DYLINKER: 618f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_DYLINKER) { 619f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (dylinker needs a dylinker)\n"); 620f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 621f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 622f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (linker_entry) { 623f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple dylinker commands)\n"); 624f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 625f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct dylinker_command)) { 626f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 627f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 628f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 629f76d27a697a7b0bf3b84490baf60623fc96a23afnjn dycmd = (struct dylinker_command *)lc; 630f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_dylinker(&linker_entry, dycmd); 631f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 632f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 633f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 634f76d27a697a7b0bf3b84490baf60623fc96a23afnjn case LC_THREAD: 635f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_EXECUTE) { 636f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (stackless thread)\n"); 637f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 638f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 639f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (stack_end || entry) { 640f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (multiple thread commands)\n"); 641f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 642f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 643f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (lc->cmdsize < sizeof(struct thread_command)) { 644f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (invalid load commands)\n"); 645f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 646f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 647f76d27a697a7b0bf3b84490baf60623fc96a23afnjn threadcmd = (struct thread_command *)lc; 648f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_thread(&entry, threadcmd); 649f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return -1; 650f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 651f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 652f76d27a697a7b0bf3b84490baf60623fc96a23afnjn default: 653f76d27a697a7b0bf3b84490baf60623fc96a23afnjn break; 654f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 655f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 656f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 657f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 658f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Done with the headers 659f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(free)(headers); 660f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 661f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (filetype == MH_EXECUTE) { 662f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Verify the necessary pieces for an executable: 663f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // a stack 664f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // a text segment 665f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // an entry point (static or linker) 666f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!stack_end || !stack_start) { 667ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(printf)("bad executable %s (no stack)\n", filename); 668f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 669f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 670f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!text) { 671f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no text segment)\n"); 672f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 673f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 674f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!entry && !linker_entry) { 675f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no entry point)\n"); 676f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 677f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 678f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 679f76d27a697a7b0bf3b84490baf60623fc96a23afnjn else if (filetype == MH_DYLINKER) { 680f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Verify the necessary pieces for a dylinker: 681f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // an entry point 682f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (!entry) { 683f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no entry point)\n"); 684f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 685f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 686f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 687f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 688f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_start) *out_stack_start = stack_start; 689f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_stack_end) *out_stack_end = stack_end; 690f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_text) *out_text = text; 691f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_entry) *out_entry = entry; 692f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (out_linker_entry) *out_linker_entry = linker_entry; 693f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 694ae284e5cc0830afcdec7b436564ea9f18bbedff8sewardj VG_(debugLog)(1, "ume", "load_thin_file: success: %s\n", filename); 695f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 696f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 697f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 698f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 699f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 700f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Load a fat Mach-O executable. 701f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 702f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 703f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 7040af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 705f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 706f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 707f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 708f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct fat_header fh; 709f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_off_t arch_offset; 710f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int i; 711f76d27a697a7b0bf3b84490baf60623fc96a23afnjn cpu_type_t good_arch; 712f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 713f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 714f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#if defined(VGA_ppc32) 715f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_POWERPC; 716cae0cc22b83ffb260ee8379e92099c5a701944cbcarll#elif defined(VGA_ppc64be) 717cae0cc22b83ffb260ee8379e92099c5a701944cbcarll good_arch = CPU_TYPE_POWERPC64BE; 718582d58245637ab05272d89fb94b12fd0f18fa0f8carll#elif defined(VGA_ppc64le) 719582d58245637ab05272d89fb94b12fd0f18fa0f8carll good_arch = CPU_TYPE_POWERPC64LE; 720f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_x86) 721f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_I386; 722f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#elif defined(VGA_amd64) 723f76d27a697a7b0bf3b84490baf60623fc96a23afnjn good_arch = CPU_TYPE_X86_64; 724f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#else 725f76d27a697a7b0bf3b84490baf60623fc96a23afnjn# error unknown architecture 726f76d27a697a7b0bf3b84490baf60623fc96a23afnjn#endif 727f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 728f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Read fat header 729f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // All fat contents are BIG-ENDIAN 730f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (size < sizeof(fh)) { 731f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad fat header)\n"); 732f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 733f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 734f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &fh, sizeof(fh), offset); 735f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(fh)) { 736f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad fat header)\n"); 737f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 738f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 739f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 740f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // Scan arch headers looking for a good one 741f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch_offset = offset + sizeof(fh); 742f76d27a697a7b0bf3b84490baf60623fc96a23afnjn fh.nfat_arch = VG_(ntohl)(fh.nfat_arch); 743f76d27a697a7b0bf3b84490baf60623fc96a23afnjn for (i = 0; i < fh.nfat_arch; i++) { 744f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct fat_arch arch; 745f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch_offset + sizeof(arch) > size) { 746f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (corrupt fat archs)\n"); 747f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 748f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 749f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 750f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &arch, sizeof(arch), arch_offset); 751f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch_offset += sizeof(arch); 752f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(arch)) { 753f76d27a697a7b0bf3b84490baf60623fc96a23afnjn VG_(printf)("bad executable (corrupt fat arch) %x %llu\n", 754f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cputype, (ULong)arch_offset); 755f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 756f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 757f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 758f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cputype = VG_(ntohl)(arch.cputype); 759f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.cpusubtype = VG_(ntohl)(arch.cpusubtype); 760f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.offset = VG_(ntohl)(arch.offset); 761f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.size = VG_(ntohl)(arch.size); 762f76d27a697a7b0bf3b84490baf60623fc96a23afnjn arch.align = VG_(ntohl)(arch.align); 763f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch.cputype == good_arch) { 764f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // use this arch 765f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (arch.offset > size || arch.offset + arch.size > size) { 766f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (corrupt fat arch 2)\n"); 767f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 768f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 769f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_mach_file(fd, offset+arch.offset, arch.size, filetype, 770f76d27a697a7b0bf3b84490baf60623fc96a23afnjn filename, out_stack_start, out_stack_end, 771f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 772f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 773f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 774f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 775f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (can't run on this machine)\n"); 776f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 777f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 778f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 779f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/* 780f76d27a697a7b0bf3b84490baf60623fc96a23afnjn Load a Mach-O executable or dylinker. 781f76d27a697a7b0bf3b84490baf60623fc96a23afnjn The file may be fat or thin. 782f76d27a697a7b0bf3b84490baf60623fc96a23afnjn*/ 783f76d27a697a7b0bf3b84490baf60623fc96a23afnjnstatic int 784f76d27a697a7b0bf3b84490baf60623fc96a23afnjnload_mach_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype, 7850af78adc02d94916ae0d31ffc02e40e3bea11877florian const HChar *filename, 786f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end, 787f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry) 788f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 789f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint32_t magic; 790f76d27a697a7b0bf3b84490baf60623fc96a23afnjn SysRes res; 791f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 792f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (size < sizeof(magic)) { 793f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 794f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 795f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 796f76d27a697a7b0bf3b84490baf60623fc96a23afnjn res = VG_(pread)(fd, &magic, sizeof(magic), offset); 797f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (sr_isError(res) || sr_Res(res) != sizeof(magic)) { 798f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (no Mach-O magic)\n"); 799f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 800f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 801f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 802f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (magic == MAGIC) { 803f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // thin 804f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_thin_file(fd, offset, size, filetype, filename, 805f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_stack_start, out_stack_end, 806f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 807f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else if (magic == VG_(htonl)(FAT_MAGIC)) { 808f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // fat 809f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return load_fat_file(fd, offset, size, filetype, filename, 810f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_stack_start, out_stack_end, 811f76d27a697a7b0bf3b84490baf60623fc96a23afnjn out_text, out_entry, out_linker_entry); 812f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } else { 813f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // huh? 814f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("bad executable (bad Mach-O magic)\n"); 815f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return -1; 816f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 817f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 818f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 819f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 820ff4a0841ea935fdbd7dae4561073eb9501cc9491florianBool VG_(match_macho)(const void *hdr, SizeT len) 821f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 8220af78adc02d94916ae0d31ffc02e40e3bea11877florian const vki_uint32_t *magic = hdr; 823f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 824f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme check more carefully for matching fat arch? 825f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 826f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return (len >= VKI_PAGE_SIZE && 827f76d27a697a7b0bf3b84490baf60623fc96a23afnjn (*magic == MAGIC || *magic == VG_(ntohl)(FAT_MAGIC))) 828f76d27a697a7b0bf3b84490baf60623fc96a23afnjn ? True : False; 829f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 830f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 831f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 832f76d27a697a7b0bf3b84490baf60623fc96a23afnjnInt VG_(load_macho)(Int fd, const HChar *name, ExeInfo *info) 833f76d27a697a7b0bf3b84490baf60623fc96a23afnjn{ 834f76d27a697a7b0bf3b84490baf60623fc96a23afnjn int err; 835f76d27a697a7b0bf3b84490baf60623fc96a23afnjn struct vg_stat sb; 836f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_start; 837f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *stack_end; 838f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *text; 839f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *entry; 840f76d27a697a7b0bf3b84490baf60623fc96a23afnjn vki_uint8_t *linker_entry; 841f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 842f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = VG_(fstat)(fd, &sb); 843f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) { 844f76d27a697a7b0bf3b84490baf60623fc96a23afnjn print("couldn't stat executable\n"); 845f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return VKI_ENOEXEC; 846f76d27a697a7b0bf3b84490baf60623fc96a23afnjn } 847f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 848f76d27a697a7b0bf3b84490baf60623fc96a23afnjn err = load_mach_file(fd, 0, sb.size, MH_EXECUTE, name, 849f76d27a697a7b0bf3b84490baf60623fc96a23afnjn &stack_start, &stack_end, 850f76d27a697a7b0bf3b84490baf60623fc96a23afnjn &text, &entry, &linker_entry); 851f76d27a697a7b0bf3b84490baf60623fc96a23afnjn if (err) return VKI_ENOEXEC; 852f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 853f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme exe_base 854f76d27a697a7b0bf3b84490baf60623fc96a23afnjn // GrP fixme exe_end 855f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->entry = (Addr)entry; 856f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->init_ip = (Addr)(linker_entry ? linker_entry : entry); 857f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->brkbase = 0xffffffff; // GrP fixme hack 858f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->init_toc = 0; // GrP fixme unused 859f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 860f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->stack_start = (Addr)stack_start; 861f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->stack_end = (Addr)stack_end; 862f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->text = (Addr)text; 863f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->dynamic = linker_entry ? True : False; 864f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 865f76d27a697a7b0bf3b84490baf60623fc96a23afnjn info->executable_path = VG_(strdup)("ume.macho.executable_path", name); 866f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 867f76d27a697a7b0bf3b84490baf60623fc96a23afnjn return 0; 868f76d27a697a7b0bf3b84490baf60623fc96a23afnjn} 869f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 8708b68b64759254d514d98328c496cbd88cde4c9a5njn#endif // defined(VGO_darwin) 871f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 872f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 873f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--- end ---*/ 874f76d27a697a7b0bf3b84490baf60623fc96a23afnjn/*--------------------------------------------------------------------*/ 875f76d27a697a7b0bf3b84490baf60623fc96a23afnjn 876