279 lines
9.6 KiB
C++
279 lines
9.6 KiB
C++
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// Copyright 2019 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "snapshot/minidump/minidump_context_converter.h"
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#include <string.h>
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#include "base/cxx17_backports.h"
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#include "base/logging.h"
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#include "minidump/minidump_context.h"
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namespace crashpad {
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namespace internal {
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MinidumpContextConverter::MinidumpContextConverter() : initialized_() {
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context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
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}
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bool MinidumpContextConverter::Initialize(
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CPUArchitecture arch,
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const std::vector<unsigned char>& minidump_context) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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if (minidump_context.size() == 0) {
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// Thread has no context.
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context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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context_.architecture = arch;
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if (context_.architecture == CPUArchitecture::kCPUArchitectureX86) {
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context_memory_.resize(sizeof(CPUContextX86));
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context_.x86 = reinterpret_cast<CPUContextX86*>(context_memory_.data());
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const MinidumpContextX86* src =
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reinterpret_cast<const MinidumpContextX86*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextX86)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextX86)) {
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return false;
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}
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if (src->context_flags & kMinidumpContextX86Extended) {
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context_.x86->fxsave = src->fxsave;
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} else if (src->context_flags & kMinidumpContextX86FloatingPoint) {
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CPUContextX86::FsaveToFxsave(src->fsave, &context_.x86->fxsave);
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}
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context_.x86->eax = src->eax;
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context_.x86->ebx = src->ebx;
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context_.x86->ecx = src->ecx;
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context_.x86->edx = src->edx;
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context_.x86->edi = src->edi;
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context_.x86->esi = src->esi;
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context_.x86->ebp = src->ebp;
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context_.x86->esp = src->esp;
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context_.x86->eip = src->eip;
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context_.x86->eflags = src->eflags;
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context_.x86->cs = static_cast<uint16_t>(src->cs);
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context_.x86->ds = static_cast<uint16_t>(src->ds);
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context_.x86->es = static_cast<uint16_t>(src->es);
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context_.x86->fs = static_cast<uint16_t>(src->fs);
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context_.x86->gs = static_cast<uint16_t>(src->gs);
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context_.x86->ss = static_cast<uint16_t>(src->ss);
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context_.x86->dr0 = src->dr0;
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context_.x86->dr1 = src->dr1;
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context_.x86->dr2 = src->dr2;
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context_.x86->dr3 = src->dr3;
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context_.x86->dr6 = src->dr6;
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context_.x86->dr7 = src->dr7;
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// Minidump passes no value for dr4/5. Our output context has space for
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// them. According to spec they're obsolete, but when present read as
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// aliases for dr6/7, so we'll do this.
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context_.x86->dr4 = src->dr6;
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context_.x86->dr5 = src->dr7;
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} else if (context_.architecture == CPUArchitecture::kCPUArchitectureX86_64) {
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context_memory_.resize(sizeof(CPUContextX86_64));
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context_.x86_64 =
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reinterpret_cast<CPUContextX86_64*>(context_memory_.data());
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const MinidumpContextAMD64* src =
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reinterpret_cast<const MinidumpContextAMD64*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextAMD64)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextAMD64)) {
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return false;
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}
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context_.x86_64->fxsave = src->fxsave;
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context_.x86_64->cs = src->cs;
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context_.x86_64->fs = src->fs;
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context_.x86_64->gs = src->gs;
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context_.x86_64->rflags = src->eflags;
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context_.x86_64->dr0 = src->dr0;
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context_.x86_64->dr1 = src->dr1;
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context_.x86_64->dr2 = src->dr2;
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context_.x86_64->dr3 = src->dr3;
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context_.x86_64->dr6 = src->dr6;
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context_.x86_64->dr7 = src->dr7;
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context_.x86_64->rax = src->rax;
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context_.x86_64->rcx = src->rcx;
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context_.x86_64->rdx = src->rdx;
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context_.x86_64->rbx = src->rbx;
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context_.x86_64->rsp = src->rsp;
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context_.x86_64->rbp = src->rbp;
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context_.x86_64->rsi = src->rsi;
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context_.x86_64->rdi = src->rdi;
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context_.x86_64->r8 = src->r8;
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context_.x86_64->r9 = src->r9;
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context_.x86_64->r10 = src->r10;
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context_.x86_64->r11 = src->r11;
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context_.x86_64->r12 = src->r12;
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context_.x86_64->r13 = src->r13;
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context_.x86_64->r14 = src->r14;
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context_.x86_64->r15 = src->r15;
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context_.x86_64->rip = src->rip;
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// See comments on x86 above.
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context_.x86_64->dr4 = src->dr6;
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context_.x86_64->dr5 = src->dr7;
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} else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM) {
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context_memory_.resize(sizeof(CPUContextARM));
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context_.arm = reinterpret_cast<CPUContextARM*>(context_memory_.data());
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const MinidumpContextARM* src =
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reinterpret_cast<const MinidumpContextARM*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextARM)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextARM)) {
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return false;
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}
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for (size_t i = 0; i < base::size(src->regs); i++) {
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context_.arm->regs[i] = src->regs[i];
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}
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context_.arm->fp = src->fp;
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context_.arm->ip = src->ip;
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context_.arm->sp = src->sp;
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context_.arm->lr = src->lr;
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context_.arm->pc = src->pc;
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context_.arm->cpsr = src->cpsr;
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context_.arm->vfp_regs.fpscr = src->fpscr;
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for (size_t i = 0; i < base::size(src->vfp); i++) {
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context_.arm->vfp_regs.vfp[i] = src->vfp[i];
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}
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context_.arm->have_fpa_regs = false;
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context_.arm->have_vfp_regs =
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!!(src->context_flags & kMinidumpContextARMVFP);
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} else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM64) {
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context_memory_.resize(sizeof(CPUContextARM64));
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context_.arm64 = reinterpret_cast<CPUContextARM64*>(context_memory_.data());
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const MinidumpContextARM64* src =
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reinterpret_cast<const MinidumpContextARM64*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextARM64)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextARM64)) {
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return false;
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}
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for (size_t i = 0; i < base::size(src->regs); i++) {
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context_.arm64->regs[i] = src->regs[i];
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}
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context_.arm64->regs[29] = src->fp;
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context_.arm64->regs[30] = src->lr;
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for (size_t i = 0; i < base::size(src->fpsimd); i++) {
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context_.arm64->fpsimd[i] = src->fpsimd[i];
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}
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context_.arm64->sp = src->sp;
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context_.arm64->pc = src->pc;
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context_.arm64->fpcr = src->fpcr;
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context_.arm64->fpsr = src->fpsr;
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context_.arm64->spsr = src->cpsr;
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} else if (context_.architecture == CPUArchitecture::kCPUArchitectureMIPSEL) {
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context_memory_.resize(sizeof(CPUContextMIPS));
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context_.mipsel = reinterpret_cast<CPUContextMIPS*>(context_memory_.data());
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const MinidumpContextMIPS* src =
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reinterpret_cast<const MinidumpContextMIPS*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextMIPS)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextMIPS)) {
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return false;
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}
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for (size_t i = 0; i < base::size(src->regs); i++) {
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context_.mipsel->regs[i] = src->regs[i];
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}
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context_.mipsel->mdhi = static_cast<uint32_t>(src->mdhi);
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context_.mipsel->mdlo = static_cast<uint32_t>(src->mdlo);
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context_.mipsel->dsp_control = src->dsp_control;
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for (size_t i = 0; i < base::size(src->hi); i++) {
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context_.mipsel->hi[i] = src->hi[i];
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context_.mipsel->lo[i] = src->lo[i];
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}
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context_.mipsel->cp0_epc = static_cast<uint32_t>(src->epc);
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context_.mipsel->cp0_badvaddr = static_cast<uint32_t>(src->badvaddr);
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context_.mipsel->cp0_status = src->status;
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context_.mipsel->cp0_cause = src->cause;
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context_.mipsel->fpcsr = src->fpcsr;
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context_.mipsel->fir = src->fir;
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memcpy(&context_.mipsel->fpregs, &src->fpregs, sizeof(src->fpregs));
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} else if (context_.architecture ==
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CPUArchitecture::kCPUArchitectureMIPS64EL) {
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context_memory_.resize(sizeof(CPUContextMIPS64));
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context_.mips64 =
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reinterpret_cast<CPUContextMIPS64*>(context_memory_.data());
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const MinidumpContextMIPS64* src =
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reinterpret_cast<const MinidumpContextMIPS64*>(minidump_context.data());
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if (minidump_context.size() < sizeof(MinidumpContextMIPS64)) {
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return false;
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}
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if (!(src->context_flags & kMinidumpContextMIPS64)) {
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return false;
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}
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for (size_t i = 0; i < base::size(src->regs); i++) {
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context_.mips64->regs[i] = src->regs[i];
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}
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context_.mips64->mdhi = src->mdhi;
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context_.mips64->mdlo = src->mdlo;
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context_.mips64->dsp_control = src->dsp_control;
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for (size_t i = 0; i < base::size(src->hi); i++) {
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context_.mips64->hi[i] = src->hi[i];
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context_.mips64->lo[i] = src->lo[i];
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}
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context_.mips64->cp0_epc = src->epc;
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context_.mips64->cp0_badvaddr = src->badvaddr;
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context_.mips64->cp0_status = src->status;
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context_.mips64->cp0_cause = src->cause;
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context_.mips64->fpcsr = src->fpcsr;
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context_.mips64->fir = src->fir;
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memcpy(&context_.mips64->fpregs, &src->fpregs, sizeof(src->fpregs));
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} else {
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// Architecture is listed as "unknown".
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DLOG(ERROR) << "Unknown architecture";
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}
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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} // namespace internal
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} // namespace crashpad
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