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 <stdint.h>
21 #include <string.h>
22 #include <sys/ptrace.h>
23 #include <sys/uio.h>
24
25 #include <backtrace/Backtrace.h>
26
27 #include "machine.h"
28 #include "utility.h"
29
dump_memory_and_code(log_t * log,Backtrace * backtrace)30 void dump_memory_and_code(log_t* log, Backtrace* backtrace) {
31 struct user_pt_regs regs;
32 struct iovec io;
33 io.iov_base = ®s;
34 io.iov_len = sizeof(regs);
35
36 if (ptrace(PTRACE_GETREGSET, backtrace->Tid(), reinterpret_cast<void*>(NT_PRSTATUS), &io) == -1) {
37 _LOG(log, logtype::ERROR, "%s: ptrace failed to get registers: %s",
38 __func__, strerror(errno));
39 return;
40 }
41
42 for (int reg = 0; reg < 31; reg++) {
43 dump_memory(log, backtrace, regs.regs[reg], "memory near x%d:", reg);
44 }
45
46 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.pc), "code around pc:");
47
48 if (regs.pc != regs.sp) {
49 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.sp), "code around sp:");
50 }
51 }
52
dump_registers(log_t * log,pid_t tid)53 void dump_registers(log_t* log, pid_t tid) {
54 struct user_pt_regs r;
55 struct iovec io;
56 io.iov_base = &r;
57 io.iov_len = sizeof(r);
58
59 if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
60 _LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
61 return;
62 }
63
64 for (int i = 0; i < 28; i += 4) {
65 _LOG(log, logtype::REGISTERS,
66 " x%-2d %016llx x%-2d %016llx x%-2d %016llx x%-2d %016llx\n",
67 i, r.regs[i],
68 i+1, r.regs[i+1],
69 i+2, r.regs[i+2],
70 i+3, r.regs[i+3]);
71 }
72
73 _LOG(log, logtype::REGISTERS, " x28 %016llx x29 %016llx x30 %016llx\n",
74 r.regs[28], r.regs[29], r.regs[30]);
75
76 _LOG(log, logtype::REGISTERS, " sp %016llx pc %016llx pstate %016llx\n",
77 r.sp, r.pc, r.pstate);
78
79 struct user_fpsimd_state f;
80 io.iov_base = &f;
81 io.iov_len = sizeof(f);
82
83 if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
84 _LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
85 return;
86 }
87
88 for (int i = 0; i < 32; i += 2) {
89 _LOG(log, logtype::FP_REGISTERS,
90 " v%-2d %016" PRIx64 "%016" PRIx64 " v%-2d %016" PRIx64 "%016" PRIx64 "\n",
91 i,
92 static_cast<uint64_t>(f.vregs[i] >> 64),
93 static_cast<uint64_t>(f.vregs[i]),
94 i+1,
95 static_cast<uint64_t>(f.vregs[i+1] >> 64),
96 static_cast<uint64_t>(f.vregs[i+1]));
97 }
98 _LOG(log, logtype::FP_REGISTERS, " fpsr %08x fpcr %08x\n", f.fpsr, f.fpcr);
99 }
100