131 lines · cpp
1//===-- RegisterContextMinidump_x86_64.cpp --------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "RegisterContextMinidump_x86_64.h"10 11#include "lldb/Utility/DataBufferHeap.h"12 13// C includes14// C++ includes15 16using namespace lldb_private;17using namespace minidump;18 19static llvm::MutableArrayRef<uint8_t> getDestRegister(uint8_t *context,20 const RegisterInfo ®) {21 auto bytes = reg.mutable_data(context);22 23 switch (reg.kinds[lldb::eRegisterKindLLDB]) {24 case lldb_cs_x86_64:25 case lldb_ds_x86_64:26 case lldb_es_x86_64:27 case lldb_fs_x86_64:28 case lldb_gs_x86_64:29 case lldb_ss_x86_64:30 return bytes.take_front(2);31 break;32 case lldb_rflags_x86_64:33 return bytes.take_front(4);34 break;35 default:36 return bytes.take_front(8);37 break;38 }39}40 41static void writeRegister(const void *reg_src, uint8_t *context,42 const RegisterInfo ®) {43 llvm::MutableArrayRef<uint8_t> reg_dest = getDestRegister(context, reg);44 memcpy(reg_dest.data(), reg_src, reg_dest.size());45}46 47// TODO: Fix the registers in this file!48// writeRegister checks x86_64 registers without base registers. This causes49// an overlap in the register enum values. So we were truncating fs_base.50// We should standardize to the x86_64_with_base registers.51static void writeBaseRegister(const void *reg_src, uint8_t *context,52 const RegisterInfo ®) {53 auto bytes = reg.mutable_data(context);54 llvm::MutableArrayRef<uint8_t> reg_dest = bytes.take_front(8);55 memcpy(reg_dest.data(), reg_src, reg_dest.size());56}57 58lldb::DataBufferSP lldb_private::minidump::ConvertMinidumpContext_x86_64(59 llvm::ArrayRef<uint8_t> source_data,60 RegisterInfoInterface *target_reg_interface) {61 62 const RegisterInfo *reg_info = target_reg_interface->GetRegisterInfo();63 64 lldb::WritableDataBufferSP result_context_buf(65 new DataBufferHeap(target_reg_interface->GetGPRSize(), 0));66 uint8_t *result_base = result_context_buf->GetBytes();67 68 if (source_data.size() < sizeof(MinidumpContext_x86_64))69 return nullptr;70 71 const MinidumpContext_x86_64 *context;72 consumeObject(source_data, context);73 74 const MinidumpContext_x86_64_Flags context_flags =75 static_cast<MinidumpContext_x86_64_Flags>(76 static_cast<uint32_t>(context->context_flags));77 auto x86_64_Flag = MinidumpContext_x86_64_Flags::x86_64_Flag;78 auto ControlFlag = MinidumpContext_x86_64_Flags::Control;79 auto IntegerFlag = MinidumpContext_x86_64_Flags::Integer;80 auto SegmentsFlag = MinidumpContext_x86_64_Flags::Segments;81 auto LLDBSpecificFlag = MinidumpContext_x86_64_Flags::LLDBSpecific;82 83 if ((context_flags & x86_64_Flag) != x86_64_Flag)84 return nullptr;85 86 if ((context_flags & ControlFlag) == ControlFlag) {87 writeRegister(&context->cs, result_base, reg_info[lldb_cs_x86_64]);88 writeRegister(&context->ss, result_base, reg_info[lldb_ss_x86_64]);89 writeRegister(&context->eflags, result_base, reg_info[lldb_rflags_x86_64]);90 writeRegister(&context->rsp, result_base, reg_info[lldb_rsp_x86_64]);91 writeRegister(&context->rip, result_base, reg_info[lldb_rip_x86_64]);92 }93 94 if ((context_flags & SegmentsFlag) == SegmentsFlag) {95 writeRegister(&context->ds, result_base, reg_info[lldb_ds_x86_64]);96 writeRegister(&context->es, result_base, reg_info[lldb_es_x86_64]);97 writeRegister(&context->fs, result_base, reg_info[lldb_fs_x86_64]);98 writeRegister(&context->gs, result_base, reg_info[lldb_gs_x86_64]);99 }100 101 if ((context_flags & IntegerFlag) == IntegerFlag) {102 writeRegister(&context->rax, result_base, reg_info[lldb_rax_x86_64]);103 writeRegister(&context->rcx, result_base, reg_info[lldb_rcx_x86_64]);104 writeRegister(&context->rdx, result_base, reg_info[lldb_rdx_x86_64]);105 writeRegister(&context->rbx, result_base, reg_info[lldb_rbx_x86_64]);106 writeRegister(&context->rbp, result_base, reg_info[lldb_rbp_x86_64]);107 writeRegister(&context->rsi, result_base, reg_info[lldb_rsi_x86_64]);108 writeRegister(&context->rdi, result_base, reg_info[lldb_rdi_x86_64]);109 writeRegister(&context->r8, result_base, reg_info[lldb_r8_x86_64]);110 writeRegister(&context->r9, result_base, reg_info[lldb_r9_x86_64]);111 writeRegister(&context->r10, result_base, reg_info[lldb_r10_x86_64]);112 writeRegister(&context->r11, result_base, reg_info[lldb_r11_x86_64]);113 writeRegister(&context->r12, result_base, reg_info[lldb_r12_x86_64]);114 writeRegister(&context->r13, result_base, reg_info[lldb_r13_x86_64]);115 writeRegister(&context->r14, result_base, reg_info[lldb_r14_x86_64]);116 writeRegister(&context->r15, result_base, reg_info[lldb_r15_x86_64]);117 }118 119 // See comment on base regsiter120 if ((context_flags & LLDBSpecificFlag) == LLDBSpecificFlag) {121 writeBaseRegister(&context->fs_base, result_base,122 reg_info[x86_64_with_base::lldb_fs_base]);123 writeBaseRegister(&context->gs_base, result_base,124 reg_info[x86_64_with_base::lldb_gs_base]);125 }126 127 // TODO parse the floating point registers128 129 return result_context_buf;130}131