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/*
*
* Copyright 2006, 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.
*/
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/user.h>
#include "../utility.h"
#include "../machine.h"
// enable to dump memory pointed to by every register
#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
#ifdef WITH_VFP
#ifdef WITH_VFP_D32
#define NUM_VFP_REGS 32
#else
#define NUM_VFP_REGS 16
#endif
#endif
// If configured to do so, dump memory around *all* registers
// for the crashing thread.
void dump_memory_and_code(log_t* log, pid_t tid) {
struct pt_regs regs;
if (ptrace(PTRACE_GETREGS, tid, 0, ®s)) {
return;
}
static const char REG_NAMES[] = "r0r1r2r3r4r5r6r7r8r9slfpipsp";
for (int reg = 0; reg < 14; reg++) {
// this may not be a valid way to access, but it'll do for now
uintptr_t addr = regs.uregs[reg];
// Don't bother if it looks like a small int or ~= null, or if
// it's in the kernel area.
if (addr < 4096 || addr >= 0xc0000000) {
continue;
}
_LOG(log, logtype::MEMORY, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]);
dump_memory(log, tid, addr);
}
// explicitly allow upload of code dump logging
_LOG(log, logtype::MEMORY, "\ncode around pc:\n");
dump_memory(log, tid, static_cast<uintptr_t>(regs.ARM_pc));
if (regs.ARM_pc != regs.ARM_lr) {
_LOG(log, logtype::MEMORY, "\ncode around lr:\n");
dump_memory(log, tid, static_cast<uintptr_t>(regs.ARM_lr));
}
}
void dump_registers(log_t* log, pid_t tid) {
struct pt_regs r;
if (ptrace(PTRACE_GETREGS, tid, 0, &r)) {
_LOG(log, logtype::REGISTERS, "cannot get registers: %s\n", strerror(errno));
return;
}
_LOG(log, logtype::REGISTERS, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
static_cast<uint32_t>(r.ARM_r0), static_cast<uint32_t>(r.ARM_r1),
static_cast<uint32_t>(r.ARM_r2), static_cast<uint32_t>(r.ARM_r3));
_LOG(log, logtype::REGISTERS, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
static_cast<uint32_t>(r.ARM_r4), static_cast<uint32_t>(r.ARM_r5),
static_cast<uint32_t>(r.ARM_r6), static_cast<uint32_t>(r.ARM_r7));
_LOG(log, logtype::REGISTERS, " r8 %08x r9 %08x sl %08x fp %08x\n",
static_cast<uint32_t>(r.ARM_r8), static_cast<uint32_t>(r.ARM_r9),
static_cast<uint32_t>(r.ARM_r10), static_cast<uint32_t>(r.ARM_fp));
_LOG(log, logtype::REGISTERS, " ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
static_cast<uint32_t>(r.ARM_ip), static_cast<uint32_t>(r.ARM_sp),
static_cast<uint32_t>(r.ARM_lr), static_cast<uint32_t>(r.ARM_pc),
static_cast<uint32_t>(r.ARM_cpsr));
#ifdef WITH_VFP
struct user_vfp vfp_regs;
int i;
if (ptrace(PTRACE_GETVFPREGS, tid, 0, &vfp_regs)) {
_LOG(log, logtype::REGISTERS, "cannot get registers: %s\n", strerror(errno));
return;
}
for (i = 0; i < NUM_VFP_REGS; i += 2) {
_LOG(log, logtype::REGISTERS, " d%-2d %016llx d%-2d %016llx\n",
i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
}
_LOG(log, logtype::REGISTERS, " scr %08lx\n", vfp_regs.fpscr);
#endif
}
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