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
dump_memory_and_code(log_t * log,pid_t tid)30 void dump_memory_and_code(log_t* log, pid_t tid) {
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, 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
dump_registers(log_t * log,pid_t tid)66 void 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