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#include <errno.h>
19#include <stddef.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/ptrace.h>
24#include <sys/types.h>
25#include <sys/user.h>
26
27#include "../utility.h"
28#include "../machine.h"
29
30void dump_memory_and_code(log_t* log, pid_t tid) {
31  pt_regs regs;
32  if (ptrace(PTRACE_GETREGS, tid, 0, &regs)) {
33    return;
34  }
35
36  static const char REG_NAMES[] = "r0r1r2r3r4r5r6r7r8r9slfpipsp";
37
38  for (int reg = 0; reg < 14; reg++) {
39    // this may not be a valid way to access, but it'll do for now
40    uintptr_t addr = regs.uregs[reg];
41
42    // Don't bother if it looks like a small int or ~= null, or if
43    // it's in the kernel area.
44    if (addr < 4096 || addr >= 0xc0000000) {
45      continue;
46    }
47
48    _LOG(log, logtype::MEMORY, "\nmemory near %.2s:\n", &REG_NAMES[reg * 2]);
49    dump_memory(log, tid, addr);
50  }
51
52  // explicitly allow upload of code dump logging
53  _LOG(log, logtype::MEMORY, "\ncode around pc:\n");
54  dump_memory(log, tid, static_cast<uintptr_t>(regs.ARM_pc));
55
56  if (regs.ARM_pc != regs.ARM_lr) {
57    _LOG(log, logtype::MEMORY, "\ncode around lr:\n");
58    dump_memory(log, tid, static_cast<uintptr_t>(regs.ARM_lr));
59  }
60}
61
62void dump_registers(log_t* log, pid_t tid) {
63  pt_regs r;
64  if (ptrace(PTRACE_GETREGS, tid, 0, &r)) {
65    _LOG(log, logtype::REGISTERS, "cannot get registers: %s\n", strerror(errno));
66    return;
67  }
68
69  _LOG(log, logtype::REGISTERS, "    r0 %08x  r1 %08x  r2 %08x  r3 %08x\n",
70       static_cast<uint32_t>(r.ARM_r0), static_cast<uint32_t>(r.ARM_r1),
71       static_cast<uint32_t>(r.ARM_r2), static_cast<uint32_t>(r.ARM_r3));
72  _LOG(log, logtype::REGISTERS, "    r4 %08x  r5 %08x  r6 %08x  r7 %08x\n",
73       static_cast<uint32_t>(r.ARM_r4), static_cast<uint32_t>(r.ARM_r5),
74       static_cast<uint32_t>(r.ARM_r6), static_cast<uint32_t>(r.ARM_r7));
75  _LOG(log, logtype::REGISTERS, "    r8 %08x  r9 %08x  sl %08x  fp %08x\n",
76       static_cast<uint32_t>(r.ARM_r8), static_cast<uint32_t>(r.ARM_r9),
77       static_cast<uint32_t>(r.ARM_r10), static_cast<uint32_t>(r.ARM_fp));
78  _LOG(log, logtype::REGISTERS, "    ip %08x  sp %08x  lr %08x  pc %08x  cpsr %08x\n",
79       static_cast<uint32_t>(r.ARM_ip), static_cast<uint32_t>(r.ARM_sp),
80       static_cast<uint32_t>(r.ARM_lr), static_cast<uint32_t>(r.ARM_pc),
81       static_cast<uint32_t>(r.ARM_cpsr));
82
83  user_vfp vfp_regs;
84  if (ptrace(PTRACE_GETVFPREGS, tid, 0, &vfp_regs)) {
85    _LOG(log, logtype::FP_REGISTERS, "cannot get FP registers: %s\n", strerror(errno));
86    return;
87  }
88
89  for (size_t i = 0; i < 32; i += 2) {
90    _LOG(log, logtype::FP_REGISTERS, "    d%-2d %016llx  d%-2d %016llx\n",
91         i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
92  }
93  _LOG(log, logtype::FP_REGISTERS, "    scr %08lx\n", vfp_regs.fpscr);
94}
95