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Add functions to convert native x86 contexts to Crashpad CPUContexts
Debug registers are currently initialized to 0 until methods are added to ThreadInfo to collect them. Bug: crashpad:30 Change-Id: Ic1aab1151dcd4bed48eca8a60b76fb0d8d613418 Reviewed-on: https://chromium-review.googlesource.com/579889 Reviewed-by: Mark Mentovai <mark@chromium.org>
This commit is contained in:
Joshua Peraza
parent
6b5f139d88
commit
7be6b8ea1d
108
snapshot/linux/cpu_context_linux.cc
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108
snapshot/linux/cpu_context_linux.cc
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// Copyright 2017 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/linux/cpu_context_linux.h"
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#include <stddef.h>
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#include <string.h>
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#include "base/logging.h"
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namespace crashpad {
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namespace internal {
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#if defined(ARCH_CPU_X86_FAMILY)
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void InitializeCPUContextX86(const ThreadContext::t32_t& thread_context,
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const FloatContext::f32_t& float_context,
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CPUContextX86* context) {
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context->eax = thread_context.eax;
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context->ebx = thread_context.ebx;
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context->ecx = thread_context.ecx;
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context->edx = thread_context.edx;
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context->edi = thread_context.edi;
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context->esi = thread_context.esi;
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context->ebp = thread_context.ebp;
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context->esp = thread_context.esp;
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context->eip = thread_context.eip;
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context->eflags = thread_context.eflags;
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context->cs = thread_context.xcs;
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context->ds = thread_context.xds;
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context->es = thread_context.xes;
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context->fs = thread_context.xfs;
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context->gs = thread_context.xgs;
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context->ss = thread_context.xss;
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static_assert(sizeof(context->fxsave) == sizeof(float_context.fxsave),
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"fxsave size mismatch");
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memcpy(&context->fxsave, &float_context.fxsave, sizeof(context->fxsave));
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// TODO(jperaza): debug registers
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context->dr0 = 0;
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context->dr1 = 0;
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context->dr2 = 0;
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context->dr3 = 0;
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context->dr4 = 0;
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context->dr5 = 0;
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context->dr6 = 0;
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context->dr7 = 0;
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}
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void InitializeCPUContextX86_64(const ThreadContext::t64_t& thread_context,
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const FloatContext::f64_t& float_context,
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CPUContextX86_64* context) {
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context->rax = thread_context.rax;
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context->rbx = thread_context.rbx;
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context->rcx = thread_context.rcx;
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context->rdx = thread_context.rdx;
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context->rdi = thread_context.rdi;
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context->rsi = thread_context.rsi;
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context->rbp = thread_context.rbp;
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context->rsp = thread_context.rsp;
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context->r8 = thread_context.r8;
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context->r9 = thread_context.r9;
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context->r10 = thread_context.r10;
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context->r11 = thread_context.r11;
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context->r12 = thread_context.r12;
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context->r13 = thread_context.r13;
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context->r14 = thread_context.r14;
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context->r15 = thread_context.r15;
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context->rip = thread_context.rip;
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context->rflags = thread_context.eflags;
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context->cs = thread_context.cs;
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context->fs = thread_context.fs;
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context->gs = thread_context.gs;
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static_assert(sizeof(context->fxsave) == sizeof(float_context.fxsave),
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"fxsave size mismatch");
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memcpy(&context->fxsave, &float_context.fxsave, sizeof(context->fxsave));
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// TODO(jperaza): debug registers.
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context->dr0 = 0;
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context->dr1 = 0;
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context->dr2 = 0;
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context->dr3 = 0;
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context->dr4 = 0;
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context->dr5 = 0;
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context->dr6 = 0;
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context->dr7 = 0;
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}
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#else
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#error Port.
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#endif // ARCH_CPU_X86_FAMILY || DOXYGEN
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} // namespace internal
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} // namespace crashpad
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53
snapshot/linux/cpu_context_linux.h
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53
snapshot/linux/cpu_context_linux.h
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// Copyright 2017 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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#ifndef CRASHPAD_SNAPSHOT_LINUX_SNAPSHOT_CPU_CONTEXT_LINUX_H_
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#define CRASHPAD_SNAPSHOT_LINUX_SNAPSHOT_CPU_CONTEXT_LINUX_H_
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#include "build/build_config.h"
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#include "snapshot/cpu_context.h"
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#include "util/linux/thread_info.h"
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namespace crashpad {
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namespace internal {
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#if defined(ARCH_CPU_X86_FAMILY) || DOXYGEN
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//! \brief Initializes a CPUContextX86 structure from native context structures
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//! on Linux.
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//!
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//! \param[in] thread_context The native thread context.
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//! \param[in] float_context The native float context.
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//! \param[out] context The CPUContextX86 structure to initialize.
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void InitializeCPUContextX86(const ThreadContext::t32_t& thread_context,
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const FloatContext::f32_t& float_context,
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CPUContextX86* context);
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//! \brief Initializes a CPUContextX86_64 structure from native context
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//! structures on Linux.
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//!
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//! \param[in] thread_context The native thread context.
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//! \param[in] float_context The native float context.
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//! \param[out] context The CPUContextX86_64 structure to initialize.
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void InitializeCPUContextX86_64(const ThreadContext::t64_t& thread_context,
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const FloatContext::f64_t& float_context,
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CPUContextX86_64* context);
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#else
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#error Port. // TODO(jperaza): ARM
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#endif // ARCH_CPU_X86_FAMILY || DOXYGEN
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} // namespace internal
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} // namespace crashpad
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#endif // CRASHPAD_SNAPSHOT_LINUX_SNAPSHOT_CPU_CONTEXT_LINUX_H_
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@ -40,6 +40,8 @@
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'exception_snapshot.h',
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'handle_snapshot.cc',
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'handle_snapshot.h',
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'linux/cpu_context_linux.cc',
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'linux/cpu_context_linux.h',
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'linux/debug_rendezvous.cc',
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'linux/debug_rendezvous.h',
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'linux/elf_dynamic_array_reader.cc',
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@ -40,7 +40,7 @@ union ThreadContext {
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//! \brief The general purpose registers used by the 32-bit variant of the
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//! architecture.
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struct t32 {
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struct t32_t {
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#if defined(ARCH_CPU_X86_FAMILY)
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// Reflects user_regs_struct in sys/user.h.
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uint32_t ebx;
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@ -77,7 +77,7 @@ union ThreadContext {
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//! \brief The general purpose registers used by the 64-bit variant of the
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//! architecture.
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struct t64 {
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struct t64_t {
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#if defined(ARCH_CPU_X86_FAMILY)
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// Reflects user_regs_struct in sys/user.h.
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uint64_t r15;
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@ -127,9 +127,9 @@ union ThreadContext {
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#endif // ARCH_CPU_X86_FAMILY || ARCH_CPU_ARM64
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#if defined(ARCH_CPU_32_BITS)
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static_assert(sizeof(t32) == sizeof(NativeThreadContext), "Size mismatch");
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static_assert(sizeof(t32_t) == sizeof(NativeThreadContext), "Size mismatch");
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#else // ARCH_CPU_64_BITS
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static_assert(sizeof(t64) == sizeof(NativeThreadContext), "Size mismatch");
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static_assert(sizeof(t64_t) == sizeof(NativeThreadContext), "Size mismatch");
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#endif // ARCH_CPU_32_BITS
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};
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static_assert(std::is_standard_layout<ThreadContext>::value,
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@ -142,7 +142,7 @@ union FloatContext {
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//! \brief The floating point registers used by the 32-bit variant of the
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//! architecture.
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struct f32 {
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struct f32_t {
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#if defined(ARCH_CPU_X86_FAMILY)
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// Reflects user_fpxregs_struct in sys/user.h
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struct fxsave {
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@ -193,7 +193,7 @@ union FloatContext {
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//! \brief The floating point registers used by the 64-bit variant of the
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//! architecture.
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struct f64 {
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struct f64_t {
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#if defined(ARCH_CPU_X86_FAMILY)
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// Refelects user_fpregs_struct in sys/user.h
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struct fxsave {
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@ -228,13 +228,14 @@ union FloatContext {
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#else
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using NativeFpxregs = user_fpxregs_struct;
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#endif // OS_ANDROID
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static_assert(sizeof(f32::fxsave) == sizeof(NativeFpxregs), "Size mismatch");
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static_assert(sizeof(f32_t::fxsave) == sizeof(NativeFpxregs),
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"Size mismatch");
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#elif defined(ARCH_CPU_X86_64)
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static_assert(sizeof(f64::fxsave) == sizeof(user_fpregs_struct),
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static_assert(sizeof(f64_t::fxsave) == sizeof(user_fpregs_struct),
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"Size mismatch");
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#elif defined(ARCH_CPU_ARMEL)
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static_assert(sizeof(f32::fpregs) == sizeof(user_fpregs), "Size mismatch");
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static_assert(sizeof(f32::vfp) == sizeof(user_vfp), "Size mismatch");
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static_assert(sizeof(f32_t::fpregs) == sizeof(user_fpregs), "Size mismatch");
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static_assert(sizeof(f32_t::vfp) == sizeof(user_vfp), "Size mismatch");
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#elif defined(ARCH_CPU_ARM64)
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static_assert(sizeof(f64) == sizeof(user_fpsimd_struct), "Size mismatch");
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#else
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