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 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 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
