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 #define LOG_TAG "DEBUG" 19 20 #include <elf.h> 21 #include <errno.h> 22 #include <stdint.h> 23 #include <string.h> 24 #include <sys/ptrace.h> 25 #include <sys/uio.h> 26 27 #include <backtrace/Backtrace.h> 28 #include <log/log.h> 29 30 #include "machine.h" 31 #include "utility.h" 32 33 void dump_memory_and_code(log_t* log, Backtrace* backtrace) { 34 struct user_pt_regs regs; 35 struct iovec io; 36 io.iov_base = ®s; 37 io.iov_len = sizeof(regs); 38 39 if (ptrace(PTRACE_GETREGSET, backtrace->Tid(), reinterpret_cast<void*>(NT_PRSTATUS), &io) == -1) { 40 ALOGE("ptrace failed to get registers: %s", strerror(errno)); 41 return; 42 } 43 44 for (int reg = 0; reg < 31; reg++) { 45 dump_memory(log, backtrace, regs.regs[reg], "memory near x%d:", reg); 46 } 47 48 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.pc), "code around pc:"); 49 50 if (regs.pc != regs.sp) { 51 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.sp), "code around sp:"); 52 } 53 } 54 55 #define DUMP_GP_REGISTERS(log) \ 56 for (int i = 0; i < 28; i += 4) { \ 57 const char* fmt = " x%-2d %016llx x%-2d %016llx x%-2d %016llx x%-2d %016llx\n"; \ 58 _LOG(log, logtype::REGISTERS, fmt, i, r.regs[i], i + 1, r.regs[i + 1], i + 2, r.regs[i + 2], \ 59 i + 3, r.regs[i + 3]); \ 60 } \ 61 _LOG(log, logtype::REGISTERS, " x28 %016llx x29 %016llx x30 %016llx\n", r.regs[28], \ 62 r.regs[29], r.regs[30]); \ 63 _LOG(log, logtype::REGISTERS, " sp %016llx pc %016llx pstate %016llx\n", r.sp, r.pc, \ 64 r.pstate) 65 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 ALOGE("ptrace error: %s\n", strerror(errno)); 74 return; 75 } 76 77 DUMP_GP_REGISTERS(log); 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 ALOGE("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 } 100 101 void dump_registers(log_t* log, const ucontext_t* ucontext) { 102 const mcontext_t& r = ucontext->uc_mcontext; 103 DUMP_GP_REGISTERS(log); 104 } 105
