118 lines
4.0 KiB
C++
118 lines
4.0 KiB
C++
/*
|
|
* Copyright 2012, The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ptrace.h>
|
|
|
|
#include <sys/user.h>
|
|
|
|
#include "../utility.h"
|
|
#include "../machine.h"
|
|
|
|
// enable to dump memory pointed to by every register
|
|
#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
|
|
|
|
#define R(x) (static_cast<unsigned int>(x))
|
|
|
|
// The MIPS uapi ptrace.h has the wrong definition for pt_regs. PTRACE_GETREGS
|
|
// writes 64-bit quantities even though the public struct uses 32-bit ones.
|
|
struct pt_regs_mips_t {
|
|
uint64_t regs[32];
|
|
uint64_t lo;
|
|
uint64_t hi;
|
|
uint64_t cp0_epc;
|
|
uint64_t cp0_badvaddr;
|
|
uint64_t cp0_status;
|
|
uint64_t cp0_cause;
|
|
};
|
|
|
|
// If configured to do so, dump memory around *all* registers
|
|
// for the crashing thread.
|
|
void dump_memory_and_code(log_t* log, pid_t tid, int scope_flags) {
|
|
pt_regs_mips_t r;
|
|
if (ptrace(PTRACE_GETREGS, tid, 0, &r)) {
|
|
return;
|
|
}
|
|
|
|
if (IS_AT_FAULT(scope_flags) && DUMP_MEMORY_FOR_ALL_REGISTERS) {
|
|
static const char REG_NAMES[] = "$0atv0v1a0a1a2a3t0t1t2t3t4t5t6t7s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra";
|
|
|
|
for (int reg = 0; reg < 32; reg++) {
|
|
// skip uninteresting registers
|
|
if (reg == 0 // $0
|
|
|| reg == 26 // $k0
|
|
|| reg == 27 // $k1
|
|
|| reg == 31 // $ra (done below)
|
|
)
|
|
continue;
|
|
|
|
uintptr_t addr = R(r.regs[reg]);
|
|
|
|
// Don't bother if it looks like a small int or ~= null, or if
|
|
// it's in the kernel area.
|
|
if (addr < 4096 || addr >= 0x80000000) {
|
|
continue;
|
|
}
|
|
|
|
_LOG(log, scope_flags | SCOPE_SENSITIVE, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]);
|
|
dump_memory(log, tid, addr, scope_flags | SCOPE_SENSITIVE);
|
|
}
|
|
}
|
|
|
|
unsigned int pc = R(r.cp0_epc);
|
|
unsigned int ra = R(r.regs[31]);
|
|
|
|
_LOG(log, scope_flags, "\ncode around pc:\n");
|
|
dump_memory(log, tid, (uintptr_t)pc, scope_flags);
|
|
|
|
if (pc != ra) {
|
|
_LOG(log, scope_flags, "\ncode around ra:\n");
|
|
dump_memory(log, tid, (uintptr_t)ra, scope_flags);
|
|
}
|
|
}
|
|
|
|
void dump_registers(log_t* log, pid_t tid, int scope_flags) {
|
|
pt_regs_mips_t r;
|
|
if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
|
|
_LOG(log, scope_flags, "cannot get registers: %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
_LOG(log, scope_flags, " zr %08x at %08x v0 %08x v1 %08x\n",
|
|
R(r.regs[0]), R(r.regs[1]), R(r.regs[2]), R(r.regs[3]));
|
|
_LOG(log, scope_flags, " a0 %08x a1 %08x a2 %08x a3 %08x\n",
|
|
R(r.regs[4]), R(r.regs[5]), R(r.regs[6]), R(r.regs[7]));
|
|
_LOG(log, scope_flags, " t0 %08x t1 %08x t2 %08x t3 %08x\n",
|
|
R(r.regs[8]), R(r.regs[9]), R(r.regs[10]), R(r.regs[11]));
|
|
_LOG(log, scope_flags, " t4 %08x t5 %08x t6 %08x t7 %08x\n",
|
|
R(r.regs[12]), R(r.regs[13]), R(r.regs[14]), R(r.regs[15]));
|
|
_LOG(log, scope_flags, " s0 %08x s1 %08x s2 %08x s3 %08x\n",
|
|
R(r.regs[16]), R(r.regs[17]), R(r.regs[18]), R(r.regs[19]));
|
|
_LOG(log, scope_flags, " s4 %08x s5 %08x s6 %08x s7 %08x\n",
|
|
R(r.regs[20]), R(r.regs[21]), R(r.regs[22]), R(r.regs[23]));
|
|
_LOG(log, scope_flags, " t8 %08x t9 %08x k0 %08x k1 %08x\n",
|
|
R(r.regs[24]), R(r.regs[25]), R(r.regs[26]), R(r.regs[27]));
|
|
_LOG(log, scope_flags, " gp %08x sp %08x s8 %08x ra %08x\n",
|
|
R(r.regs[28]), R(r.regs[29]), R(r.regs[30]), R(r.regs[31]));
|
|
_LOG(log, scope_flags, " hi %08x lo %08x bva %08x epc %08x\n",
|
|
R(r.hi), R(r.lo), R(r.cp0_badvaddr), R(r.cp0_epc));
|
|
}
|