1/*
2 *
3 * Copyright 2006, The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#define LOG_TAG "DEBUG"
19
20#include <errno.h>
21#include <stdint.h>
22#include <string.h>
23#include <sys/ptrace.h>
24
25#include <backtrace/Backtrace.h>
26#include <log/log.h>
27
28#include "machine.h"
29#include "utility.h"
30
31void dump_memory_and_code(log_t* log, Backtrace* backtrace) {
32  pt_regs regs;
33  if (ptrace(PTRACE_GETREGS, backtrace->Tid(), 0, &regs)) {
34    ALOGE("cannot get registers: %s\n", strerror(errno));
35    return;
36  }
37
38  static const char reg_names[] = "r0r1r2r3r4r5r6r7r8r9slfpipsp";
39
40  for (int reg = 0; reg < 14; reg++) {
41    dump_memory(log, backtrace, regs.uregs[reg], "memory near %.2s:", &reg_names[reg * 2]);
42  }
43
44  dump_memory(log, backtrace, static_cast<uintptr_t>(regs.ARM_pc), "code around pc:");
45
46  if (regs.ARM_pc != regs.ARM_lr) {
47    dump_memory(log, backtrace, static_cast<uintptr_t>(regs.ARM_lr), "code around lr:");
48  }
49}
50
51void dump_registers(log_t* log, pid_t tid) {
52  pt_regs r;
53  if (ptrace(PTRACE_GETREGS, tid, 0, &r)) {
54    ALOGE("cannot get registers: %s\n", strerror(errno));
55    return;
56  }
57
58  _LOG(log, logtype::REGISTERS, "    r0 %08x  r1 %08x  r2 %08x  r3 %08x\n",
59       static_cast<uint32_t>(r.ARM_r0), static_cast<uint32_t>(r.ARM_r1),
60       static_cast<uint32_t>(r.ARM_r2), static_cast<uint32_t>(r.ARM_r3));
61  _LOG(log, logtype::REGISTERS, "    r4 %08x  r5 %08x  r6 %08x  r7 %08x\n",
62       static_cast<uint32_t>(r.ARM_r4), static_cast<uint32_t>(r.ARM_r5),
63       static_cast<uint32_t>(r.ARM_r6), static_cast<uint32_t>(r.ARM_r7));
64  _LOG(log, logtype::REGISTERS, "    r8 %08x  r9 %08x  sl %08x  fp %08x\n",
65       static_cast<uint32_t>(r.ARM_r8), static_cast<uint32_t>(r.ARM_r9),
66       static_cast<uint32_t>(r.ARM_r10), static_cast<uint32_t>(r.ARM_fp));
67  _LOG(log, logtype::REGISTERS, "    ip %08x  sp %08x  lr %08x  pc %08x  cpsr %08x\n",
68       static_cast<uint32_t>(r.ARM_ip), static_cast<uint32_t>(r.ARM_sp),
69       static_cast<uint32_t>(r.ARM_lr), static_cast<uint32_t>(r.ARM_pc),
70       static_cast<uint32_t>(r.ARM_cpsr));
71
72  user_vfp vfp_regs;
73  if (ptrace(PTRACE_GETVFPREGS, tid, 0, &vfp_regs)) {
74    ALOGE("cannot get FP registers: %s\n", strerror(errno));
75    return;
76  }
77
78  for (size_t i = 0; i < 32; i += 2) {
79    _LOG(log, logtype::FP_REGISTERS, "    d%-2d %016llx  d%-2d %016llx\n",
80         i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
81  }
82  _LOG(log, logtype::FP_REGISTERS, "    scr %08lx\n", vfp_regs.fpscr);
83}
84