projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 39037602 A |
1 | /* |
| 2 | * Copyright (c) 2013-2015 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 12 | * | |
| 13 | * The Original Code and all software distributed under the License are | |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 20 | * | |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | ||
| 24 | #include "trace_internal.h" | |
| 25 | #include <mach-o/loader.h> | |
| 26 | #include <string.h> | |
| 27 | ||
| 28 | static bool | |
| 29 | _os_trace_addr_in_text_segment_32(const void *dso, const void *addr) | |
| 30 | { | |
| 0a7de745 A |
31 | const struct mach_header *mhp = (const struct mach_header *) dso; |
| 32 | const struct segment_command *sgp = (const struct segment_command *)(const void *)((const char *)mhp + sizeof(struct mach_header)); | |
| 39037602 | 33 | |
| 0a7de745 A |
34 | for (uint32_t i = 0; i < mhp->ncmds; i++) { |
| 35 | if (sgp->cmd == LC_SEGMENT) { | |
| 36 | if (strncmp(sgp->segname, SEG_TEXT, sizeof(sgp->segname)) == 0) { | |
| 37 | return (uintptr_t)addr >= (sgp->vmaddr) && (uintptr_t)addr < (sgp->vmaddr + sgp->vmsize); | |
| 38 | } | |
| 39 | } | |
| 40 | sgp = (const struct segment_command *)(const void *)((const char *)sgp + sgp->cmdsize); | |
| 41 | } | |
| 39037602 | 42 | |
| 0a7de745 | 43 | return false; |
| 39037602 A |
44 | } |
| 45 | ||
| 46 | static bool | |
| 47 | _os_trace_addr_in_text_segment_64(const void *dso, const void *addr) | |
| 48 | { | |
| 0a7de745 A |
49 | const struct mach_header_64 *mhp = (const struct mach_header_64 *) dso; |
| 50 | const struct segment_command_64 *sgp = (const struct segment_command_64 *)(const void *)((const char *)mhp + sizeof(struct mach_header_64)); | |
| 39037602 | 51 | |
| 0a7de745 A |
52 | for (uint32_t i = 0; i < mhp->ncmds; i++) { |
| 53 | if (sgp->cmd == LC_SEGMENT_64) { | |
| 54 | if (strncmp(sgp->segname, SEG_TEXT, sizeof(sgp->segname)) == 0) { | |
| 55 | return (uintptr_t)addr >= (sgp->vmaddr) && (uintptr_t)addr < (sgp->vmaddr + sgp->vmsize); | |
| 56 | } | |
| 57 | } | |
| 58 | sgp = (const struct segment_command_64 *)(const void *)((const char *)sgp + sgp->cmdsize); | |
| 59 | } | |
| 39037602 | 60 | |
| 0a7de745 | 61 | return false; |
| 39037602 A |
62 | } |
| 63 | ||
| 64 | bool | |
| 65 | _os_trace_addr_in_text_segment(const void *dso, const void *addr) | |
| 66 | { | |
| 0a7de745 A |
67 | const struct mach_header *mhp = (const struct mach_header *) dso; |
| 68 | bool retval = false; | |
| 39037602 | 69 | |
| 0a7de745 A |
70 | switch (mhp->magic) { |
| 71 | case MH_MAGIC: | |
| 72 | retval = _os_trace_addr_in_text_segment_32(dso, addr); | |
| 73 | break; | |
| 39037602 | 74 | |
| 0a7de745 A |
75 | case MH_MAGIC_64: |
| 76 | retval = _os_trace_addr_in_text_segment_64(dso, addr); | |
| 77 | break; | |
| 39037602 | 78 | |
| 0a7de745 A |
79 | default: |
| 80 | retval = false; | |
| 81 | break; | |
| 82 | } | |
| 39037602 | 83 | |
| 0a7de745 | 84 | return retval; |
| 39037602 | 85 | } |