Chris Dearman | 231e3c8 | 2012-08-10 17:06:20 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "Corkscrew" |
| 18 | //#define LOG_NDEBUG 0 |
| 19 | |
| 20 | #include "../ptrace-arch.h" |
| 21 | |
Chris Dearman | 52998578 | 2013-12-06 04:29:37 -0800 | [diff] [blame] | 22 | #include <stddef.h> |
| 23 | #include <elf.h> |
Chris Dearman | 231e3c8 | 2012-08-10 17:06:20 -0700 | [diff] [blame] | 24 | #include <cutils/log.h> |
| 25 | |
Chris Dearman | 52998578 | 2013-12-06 04:29:37 -0800 | [diff] [blame] | 26 | static void load_eh_frame_hdr(pid_t pid, map_info_t* mi, uintptr_t *eh_frame_hdr) { |
| 27 | uint32_t elf_phoff; |
| 28 | uint32_t elf_phentsize_ehsize; |
| 29 | uint32_t elf_shentsize_phnum; |
| 30 | |
| 31 | |
| 32 | try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff); |
| 33 | ALOGV("reading 0x%08x elf_phoff:%x", mi->start + offsetof(Elf32_Ehdr, e_phoff), elf_phoff); |
| 34 | try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize), &elf_phentsize_ehsize); |
| 35 | ALOGV("reading 0x%08x elf_phentsize_ehsize:%x", mi->start + offsetof(Elf32_Ehdr, e_ehsize), elf_phentsize_ehsize); |
| 36 | try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum), &elf_shentsize_phnum); |
| 37 | ALOGV("reading 0x%08x elf_shentsize_phnum:%x", mi->start + offsetof(Elf32_Ehdr, e_phnum), elf_shentsize_phnum); |
| 38 | |
| 39 | |
| 40 | |
| 41 | if (try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff) |
| 42 | && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize), |
| 43 | &elf_phentsize_ehsize) |
| 44 | && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum), |
| 45 | &elf_shentsize_phnum)) { |
| 46 | uint32_t elf_phentsize = elf_phentsize_ehsize >> 16; |
| 47 | uint32_t elf_phnum = elf_shentsize_phnum & 0xffff; |
| 48 | for (uint32_t i = 0; i < elf_phnum; i++) { |
| 49 | uintptr_t elf_phdr = mi->start + elf_phoff + i * elf_phentsize; |
| 50 | uint32_t elf_phdr_type; |
| 51 | if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_type), &elf_phdr_type)) { |
| 52 | break; |
| 53 | } |
| 54 | if (elf_phdr_type == PT_GNU_EH_FRAME) { |
| 55 | uint32_t elf_phdr_offset; |
| 56 | if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_offset), |
| 57 | &elf_phdr_offset)) { |
| 58 | break; |
| 59 | } |
| 60 | *eh_frame_hdr = mi->start + elf_phdr_offset; |
| 61 | ALOGV("Parsed .eh_frame_hdr info for %s: start=0x%08x", mi->name, *eh_frame_hdr); |
| 62 | return; |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | *eh_frame_hdr = 0; |
Chris Dearman | 231e3c8 | 2012-08-10 17:06:20 -0700 | [diff] [blame] | 67 | } |
| 68 | |
Chris Dearman | 52998578 | 2013-12-06 04:29:37 -0800 | [diff] [blame] | 69 | void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data) { |
| 70 | ALOGV("load_ptrace_map_info_data_arch"); |
| 71 | load_eh_frame_hdr(pid, mi, &data->eh_frame_hdr); |
| 72 | } |
| 73 | |
| 74 | void free_ptrace_map_info_data_arch(map_info_t* mi __attribute__((unused)), |
| 75 | map_info_data_t* data __attribute__((unused))) { |
| 76 | ALOGV("free_ptrace_map_info_data_arch"); |
Chris Dearman | 231e3c8 | 2012-08-10 17:06:20 -0700 | [diff] [blame] | 77 | } |