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