1 //===-- RegisterContextMinidump_x86_64.cpp ----------------------*- C++ -*-===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "RegisterContextMinidump_x86_64.h" 10 11 #include "lldb/Utility/DataBufferHeap.h" 12 13 // C includes 14 // C++ includes 15 16 using namespace lldb_private; 17 using namespace minidump; 18 19 static 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 41 static 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 lldb::DataBufferSP lldb_private::minidump::ConvertMinidumpContext_x86_64( 48 llvm::ArrayRef<uint8_t> source_data, 49 RegisterInfoInterface *target_reg_interface) { 50 51 const RegisterInfo *reg_info = target_reg_interface->GetRegisterInfo(); 52 53 lldb::DataBufferSP result_context_buf( 54 new DataBufferHeap(target_reg_interface->GetGPRSize(), 0)); 55 uint8_t *result_base = result_context_buf->GetBytes(); 56 57 if (source_data.size() < sizeof(MinidumpContext_x86_64)) 58 return nullptr; 59 60 const MinidumpContext_x86_64 *context; 61 consumeObject(source_data, context); 62 63 const MinidumpContext_x86_64_Flags context_flags = 64 static_cast<MinidumpContext_x86_64_Flags>( 65 static_cast<uint32_t>(context->context_flags)); 66 auto x86_64_Flag = MinidumpContext_x86_64_Flags::x86_64_Flag; 67 auto ControlFlag = MinidumpContext_x86_64_Flags::Control; 68 auto IntegerFlag = MinidumpContext_x86_64_Flags::Integer; 69 auto SegmentsFlag = MinidumpContext_x86_64_Flags::Segments; 70 71 if ((context_flags & x86_64_Flag) != x86_64_Flag) 72 return nullptr; 73 74 if ((context_flags & ControlFlag) == ControlFlag) { 75 writeRegister(&context->cs, result_base, reg_info[lldb_cs_x86_64]); 76 writeRegister(&context->ss, result_base, reg_info[lldb_ss_x86_64]); 77 writeRegister(&context->eflags, result_base, reg_info[lldb_rflags_x86_64]); 78 writeRegister(&context->rsp, result_base, reg_info[lldb_rsp_x86_64]); 79 writeRegister(&context->rip, result_base, reg_info[lldb_rip_x86_64]); 80 } 81 82 if ((context_flags & SegmentsFlag) == SegmentsFlag) { 83 writeRegister(&context->ds, result_base, reg_info[lldb_ds_x86_64]); 84 writeRegister(&context->es, result_base, reg_info[lldb_es_x86_64]); 85 writeRegister(&context->fs, result_base, reg_info[lldb_fs_x86_64]); 86 writeRegister(&context->gs, result_base, reg_info[lldb_gs_x86_64]); 87 } 88 89 if ((context_flags & IntegerFlag) == IntegerFlag) { 90 writeRegister(&context->rax, result_base, reg_info[lldb_rax_x86_64]); 91 writeRegister(&context->rcx, result_base, reg_info[lldb_rcx_x86_64]); 92 writeRegister(&context->rdx, result_base, reg_info[lldb_rdx_x86_64]); 93 writeRegister(&context->rbx, result_base, reg_info[lldb_rbx_x86_64]); 94 writeRegister(&context->rbp, result_base, reg_info[lldb_rbp_x86_64]); 95 writeRegister(&context->rsi, result_base, reg_info[lldb_rsi_x86_64]); 96 writeRegister(&context->rdi, result_base, reg_info[lldb_rdi_x86_64]); 97 writeRegister(&context->r8, result_base, reg_info[lldb_r8_x86_64]); 98 writeRegister(&context->r9, result_base, reg_info[lldb_r9_x86_64]); 99 writeRegister(&context->r10, result_base, reg_info[lldb_r10_x86_64]); 100 writeRegister(&context->r11, result_base, reg_info[lldb_r11_x86_64]); 101 writeRegister(&context->r12, result_base, reg_info[lldb_r12_x86_64]); 102 writeRegister(&context->r13, result_base, reg_info[lldb_r13_x86_64]); 103 writeRegister(&context->r14, result_base, reg_info[lldb_r14_x86_64]); 104 writeRegister(&context->r15, result_base, reg_info[lldb_r15_x86_64]); 105 } 106 107 // TODO parse the floating point registers 108 109 return result_context_buf; 110 } 111