From 2ea9a32434ef95f7b2105a03df758b5d82c2e123 Mon Sep 17 00:00:00 2001 From: Douglas Leung Date: Mon, 9 Mar 2015 18:41:32 -0700 Subject: [PATCH] Add backtrace support for mips64. Change-Id: I12ea2fcbe6780bb596f51988eae1ceafcec858df --- debuggerd/Android.mk | 4 +- debuggerd/mips64/crashglue.S | 48 +++++++++++++++++ debuggerd/mips64/machine.cpp | 100 +++++++++++++++++++++++++++++++++++ debuggerd/utility.h | 4 +- 4 files changed, 153 insertions(+), 3 deletions(-) create mode 100644 debuggerd/mips64/crashglue.S create mode 100644 debuggerd/mips64/machine.cpp diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk index fbaac3980..8cc4682ac 100644 --- a/debuggerd/Android.mk +++ b/debuggerd/Android.mk @@ -12,7 +12,7 @@ LOCAL_SRC_FILES:= \ LOCAL_SRC_FILES_arm := arm/machine.cpp LOCAL_SRC_FILES_arm64 := arm64/machine.cpp LOCAL_SRC_FILES_mips := mips/machine.cpp -LOCAL_SRC_FILES_mips64 := mips/machine.cpp +LOCAL_SRC_FILES_mips64 := mips64/machine.cpp LOCAL_SRC_FILES_x86 := x86/machine.cpp LOCAL_SRC_FILES_x86_64 := x86_64/machine.cpp @@ -49,7 +49,7 @@ LOCAL_SRC_FILES := crasher.c LOCAL_SRC_FILES_arm := arm/crashglue.S LOCAL_SRC_FILES_arm64 := arm64/crashglue.S LOCAL_SRC_FILES_mips := mips/crashglue.S -LOCAL_SRC_FILES_mips64 := mips/crashglue.S +LOCAL_SRC_FILES_mips64 := mips64/crashglue.S LOCAL_SRC_FILES_x86 := x86/crashglue.S LOCAL_SRC_FILES_x86_64 := x86_64/crashglue.S LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES) diff --git a/debuggerd/mips64/crashglue.S b/debuggerd/mips64/crashglue.S new file mode 100644 index 000000000..70a664127 --- /dev/null +++ b/debuggerd/mips64/crashglue.S @@ -0,0 +1,48 @@ + .set noat + + .globl crash1 + .globl crashnostack + +crash1: + li $0,0xdead0000+0 + li $1,0xdead0000+1 + li $2,0xdead0000+2 + li $3,0xdead0000+3 + li $4,0xdead0000+4 + li $5,0xdead0000+5 + li $6,0xdead0000+6 + li $7,0xdead0000+7 + li $8,0xdead0000+8 + li $9,0xdead0000+9 + li $10,0xdead0000+10 + li $11,0xdead0000+11 + li $12,0xdead0000+12 + li $13,0xdead0000+13 + li $14,0xdead0000+14 + li $15,0xdead0000+15 + li $16,0xdead0000+16 + li $17,0xdead0000+17 + li $18,0xdead0000+18 + li $19,0xdead0000+19 + li $20,0xdead0000+20 + li $21,0xdead0000+21 + li $22,0xdead0000+22 + li $23,0xdead0000+23 + li $24,0xdead0000+24 + li $25,0xdead0000+25 + li $26,0xdead0000+26 + li $27,0xdead0000+27 + li $28,0xdead0000+28 + # don't trash the stack otherwise the signal handler won't run + #li $29,0xdead0000+29 + li $30,0xdead0000+30 + li $31,0xdead0000+31 + + lw $zero,($0) + b . + + +crashnostack: + li $sp, 0 + lw $zero,($0) + b . diff --git a/debuggerd/mips64/machine.cpp b/debuggerd/mips64/machine.cpp new file mode 100644 index 000000000..ef9092fd6 --- /dev/null +++ b/debuggerd/mips64/machine.cpp @@ -0,0 +1,100 @@ +/* + * Copyright 2014, 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 +#include +#include +#include +#include +#include +#include + +#include + +#include "../utility.h" +#include "../machine.h" + +#define R(x) (static_cast(x)) + +// 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) { + pt_regs r; + if (ptrace(PTRACE_GETREGS, tid, 0, &r)) { + return; + } + + static const char REG_NAMES[] = "$0atv0v1a0a1a2a3a4a5a6a7t0t1t2t3s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra"; + + 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 >= 0x4000000000000000) { + continue; + } + + _LOG(log, logtype::MEMORY, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]); + dump_memory(log, tid, addr); + } + + unsigned long pc = R(r.cp0_epc); + unsigned long ra = R(r.regs[31]); + + _LOG(log, logtype::MEMORY, "\ncode around pc:\n"); + dump_memory(log, tid, (uintptr_t)pc); + + if (pc != ra) { + _LOG(log, logtype::MEMORY, "\ncode around ra:\n"); + dump_memory(log, tid, (uintptr_t)ra); + } +} + +void dump_registers(log_t* log, pid_t tid) { + pt_regs r; + if(ptrace(PTRACE_GETREGS, tid, 0, &r)) { + _LOG(log, logtype::ERROR, "cannot get registers: %s\n", strerror(errno)); + return; + } + + _LOG(log, logtype::REGISTERS, " zr %016lx at %016lx v0 %016lx v1 %016lx\n", + R(r.regs[0]), R(r.regs[1]), R(r.regs[2]), R(r.regs[3])); + _LOG(log, logtype::REGISTERS, " a0 %016lx a1 %016lx a2 %016lx a3 %016lx\n", + R(r.regs[4]), R(r.regs[5]), R(r.regs[6]), R(r.regs[7])); + _LOG(log, logtype::REGISTERS, " a4 %016lx a5 %016lx a6 %016lx a7 %016lx\n", + R(r.regs[8]), R(r.regs[9]), R(r.regs[10]), R(r.regs[11])); + _LOG(log, logtype::REGISTERS, " t0 %016lx t1 %016lx t2 %016lx t3 %016lx\n", + R(r.regs[12]), R(r.regs[13]), R(r.regs[14]), R(r.regs[15])); + _LOG(log, logtype::REGISTERS, " s0 %016lx s1 %016lx s2 %016lx s3 %016lx\n", + R(r.regs[16]), R(r.regs[17]), R(r.regs[18]), R(r.regs[19])); + _LOG(log, logtype::REGISTERS, " s4 %016lx s5 %016lx s6 %016lx s7 %016lx\n", + R(r.regs[20]), R(r.regs[21]), R(r.regs[22]), R(r.regs[23])); + _LOG(log, logtype::REGISTERS, " t8 %016lx t9 %016lx k0 %016lx k1 %016lx\n", + R(r.regs[24]), R(r.regs[25]), R(r.regs[26]), R(r.regs[27])); + _LOG(log, logtype::REGISTERS, " gp %016lx sp %016lx s8 %016lx ra %016lx\n", + R(r.regs[28]), R(r.regs[29]), R(r.regs[30]), R(r.regs[31])); + _LOG(log, logtype::REGISTERS, " hi %016lx lo %016lx bva %016lx epc %016lx\n", + R(r.hi), R(r.lo), R(r.cp0_badvaddr), R(r.cp0_epc)); +} diff --git a/debuggerd/utility.h b/debuggerd/utility.h index 58a882c2b..49b46e81a 100644 --- a/debuggerd/utility.h +++ b/debuggerd/utility.h @@ -26,8 +26,10 @@ #define ABI_STRING "arm" #elif defined(__aarch64__) #define ABI_STRING "arm64" -#elif defined(__mips__) +#elif defined(__mips__) && !defined(__LP64__) #define ABI_STRING "mips" +#elif defined(__mips__) && defined(__LP64__) +#define ABI_STRING "mips64" #elif defined(__i386__) #define ABI_STRING "x86" #elif defined(__x86_64__)