74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "Corkscrew"
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//#define LOG_NDEBUG 0
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#include "../ptrace-arch.h"
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#include <sys/exec_elf.h>
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#include <cutils/log.h>
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#ifndef PT_ARM_EXIDX
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#define PT_ARM_EXIDX 0x70000001
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#endif
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static void load_exidx_header(pid_t pid, map_info_t* mi,
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uintptr_t* out_exidx_start, size_t* out_exidx_size) {
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uint32_t elf_phoff;
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uint32_t elf_phentsize_ehsize;
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uint32_t elf_shentsize_phnum;
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if (try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff)
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&& try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize),
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&elf_phentsize_ehsize)
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&& try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum),
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&elf_shentsize_phnum)) {
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uint32_t elf_phentsize = elf_phentsize_ehsize >> 16;
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uint32_t elf_phnum = elf_shentsize_phnum & 0xffff;
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for (uint32_t i = 0; i < elf_phnum; i++) {
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uintptr_t elf_phdr = mi->start + elf_phoff + i * elf_phentsize;
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uint32_t elf_phdr_type;
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if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_type), &elf_phdr_type)) {
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break;
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}
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if (elf_phdr_type == PT_ARM_EXIDX) {
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uint32_t elf_phdr_offset;
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uint32_t elf_phdr_filesz;
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if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_offset),
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&elf_phdr_offset)
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|| !try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_filesz),
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&elf_phdr_filesz)) {
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break;
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}
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*out_exidx_start = mi->start + elf_phdr_offset;
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*out_exidx_size = elf_phdr_filesz / 8;
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ALOGV("Parsed EXIDX header info for %s: start=0x%08x, size=%d", mi->name,
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*out_exidx_start, *out_exidx_size);
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return;
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}
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}
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}
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*out_exidx_start = 0;
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*out_exidx_size = 0;
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}
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void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data) {
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load_exidx_header(pid, mi, &data->exidx_start, &data->exidx_size);
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}
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void free_ptrace_map_info_data_arch(map_info_t* mi, map_info_data_t* data) {
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}
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