1/*
2 *
3 * Copyright 2014, 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 <elf.h>
19#include <errno.h>
20#include <inttypes.h>
21#include <string.h>
22#include <sys/types.h>
23#include <sys/ptrace.h>
24#include <sys/user.h>
25#include <sys/uio.h>
26
27#include "../utility.h"
28#include "../machine.h"
29
30void dump_memory_and_code(log_t* log, pid_t tid) {
31    struct user_pt_regs regs;
32    struct iovec io;
33    io.iov_base = &regs;
34    io.iov_len = sizeof(regs);
35
36    if (ptrace(PTRACE_GETREGSET, tid, (void*)NT_PRSTATUS, &io) == -1) {
37        _LOG(log, logtype::ERROR, "%s: ptrace failed to get registers: %s\n",
38             __func__, strerror(errno));
39        return;
40    }
41
42    for (int reg = 0; reg < 31; reg++) {
43        uintptr_t addr = regs.regs[reg];
44
45        /*
46         * Don't bother if it looks like a small int or ~= null, or if
47         * it's in the kernel area.
48         */
49        if (addr < 4096 || addr >= (1UL<<63)) {
50            continue;
51        }
52
53        _LOG(log, logtype::MEMORY, "\nmemory near x%d:\n", reg);
54        dump_memory(log, tid, addr);
55    }
56
57    _LOG(log, logtype::MEMORY, "\ncode around pc:\n");
58    dump_memory(log, tid, (uintptr_t)regs.pc);
59
60    if (regs.pc != regs.sp) {
61        _LOG(log, logtype::MEMORY, "\ncode around sp:\n");
62        dump_memory(log, tid, (uintptr_t)regs.sp);
63    }
64}
65
66void dump_registers(log_t* log, pid_t tid) {
67  struct user_pt_regs r;
68  struct iovec io;
69  io.iov_base = &r;
70  io.iov_len = sizeof(r);
71
72  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
73    _LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
74    return;
75  }
76
77  for (int i = 0; i < 28; i += 4) {
78    _LOG(log, logtype::REGISTERS,
79         "    x%-2d  %016llx  x%-2d  %016llx  x%-2d  %016llx  x%-2d  %016llx\n",
80         i, r.regs[i],
81         i+1, r.regs[i+1],
82         i+2, r.regs[i+2],
83         i+3, r.regs[i+3]);
84  }
85
86  _LOG(log, logtype::REGISTERS, "    x28  %016llx  x29  %016llx  x30  %016llx\n",
87       r.regs[28], r.regs[29], r.regs[30]);
88
89  _LOG(log, logtype::REGISTERS, "    sp   %016llx  pc   %016llx  pstate %016llx\n",
90       r.sp, r.pc, r.pstate);
91
92  struct user_fpsimd_state f;
93  io.iov_base = &f;
94  io.iov_len = sizeof(f);
95
96  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
97    _LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
98    return;
99  }
100
101  for (int i = 0; i < 32; i += 2) {
102    _LOG(log, logtype::FP_REGISTERS,
103         "    v%-2d  %016" PRIx64 "%016" PRIx64 "  v%-2d  %016" PRIx64 "%016" PRIx64 "\n",
104         i,
105         static_cast<uint64_t>(f.vregs[i] >> 64),
106         static_cast<uint64_t>(f.vregs[i]),
107         i+1,
108         static_cast<uint64_t>(f.vregs[i+1] >> 64),
109         static_cast<uint64_t>(f.vregs[i+1]));
110  }
111  _LOG(log, logtype::FP_REGISTERS, "    fpsr %08x  fpcr %08x\n", f.fpsr, f.fpcr);
112}
113