1 //===-- RegisterContextMinidump_x86_64.cpp ----------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // Project includes 11 #include "RegisterContextMinidump_x86_64.h" 12 13 // Other libraries and framework includes 14 #include "lldb/Core/DataBufferHeap.h" 15 16 // C includes 17 // C++ includes 18 19 using namespace lldb_private; 20 using namespace minidump; 21 22 static llvm::MutableArrayRef<uint8_t> getDestRegister(uint8_t *context, 23 const RegisterInfo ®) { 24 auto bytes = reg.mutable_data(context); 25 26 switch (reg.kinds[lldb::eRegisterKindLLDB]) { 27 case lldb_cs_x86_64: 28 case lldb_ds_x86_64: 29 case lldb_es_x86_64: 30 case lldb_fs_x86_64: 31 case lldb_gs_x86_64: 32 case lldb_ss_x86_64: 33 return bytes.take_front(2); 34 break; 35 case lldb_rflags_x86_64: 36 return bytes.take_front(4); 37 break; 38 default: 39 return bytes.take_front(8); 40 break; 41 } 42 } 43 44 static void writeRegister(const void *reg_src, uint8_t *context, 45 const RegisterInfo ®) { 46 llvm::MutableArrayRef<uint8_t> reg_dest = getDestRegister(context, reg); 47 memcpy(reg_dest.data(), reg_src, reg_dest.size()); 48 } 49 50 lldb::DataBufferSP lldb_private::minidump::ConvertMinidumpContext_x86_64( 51 llvm::ArrayRef<uint8_t> source_data, 52 RegisterInfoInterface *target_reg_interface) { 53 54 const RegisterInfo *reg_info = target_reg_interface->GetRegisterInfo(); 55 56 lldb::DataBufferSP result_context_buf( 57 new DataBufferHeap(target_reg_interface->GetGPRSize(), 0)); 58 uint8_t *result_base = result_context_buf->GetBytes(); 59 60 if (source_data.size() < sizeof(MinidumpContext_x86_64)) 61 return nullptr; 62 63 const MinidumpContext_x86_64 *context; 64 consumeObject(source_data, context); 65 66 const MinidumpContext_x86_64_Flags context_flags = 67 static_cast<MinidumpContext_x86_64_Flags>( 68 static_cast<uint32_t>(context->context_flags)); 69 auto x86_64_Flag = MinidumpContext_x86_64_Flags::x86_64_Flag; 70 auto ControlFlag = MinidumpContext_x86_64_Flags::Control; 71 auto IntegerFlag = MinidumpContext_x86_64_Flags::Integer; 72 auto SegmentsFlag = MinidumpContext_x86_64_Flags::Segments; 73 74 if ((context_flags & x86_64_Flag) != x86_64_Flag) 75 return nullptr; 76 77 if ((context_flags & ControlFlag) == ControlFlag) { 78 writeRegister(&context->cs, result_base, reg_info[lldb_cs_x86_64]); 79 writeRegister(&context->ss, result_base, reg_info[lldb_ss_x86_64]); 80 writeRegister(&context->eflags, result_base, reg_info[lldb_rflags_x86_64]); 81 writeRegister(&context->rsp, result_base, reg_info[lldb_rsp_x86_64]); 82 writeRegister(&context->rip, result_base, reg_info[lldb_rip_x86_64]); 83 } 84 85 if ((context_flags & SegmentsFlag) == SegmentsFlag) { 86 writeRegister(&context->ds, result_base, reg_info[lldb_ds_x86_64]); 87 writeRegister(&context->es, result_base, reg_info[lldb_es_x86_64]); 88 writeRegister(&context->fs, result_base, reg_info[lldb_fs_x86_64]); 89 writeRegister(&context->gs, result_base, reg_info[lldb_gs_x86_64]); 90 } 91 92 if ((context_flags & IntegerFlag) == IntegerFlag) { 93 writeRegister(&context->rax, result_base, reg_info[lldb_rax_x86_64]); 94 writeRegister(&context->rcx, result_base, reg_info[lldb_rcx_x86_64]); 95 writeRegister(&context->rdx, result_base, reg_info[lldb_rdx_x86_64]); 96 writeRegister(&context->rbx, result_base, reg_info[lldb_rbx_x86_64]); 97 writeRegister(&context->rbp, result_base, reg_info[lldb_rbp_x86_64]); 98 writeRegister(&context->rsi, result_base, reg_info[lldb_rsi_x86_64]); 99 writeRegister(&context->rdi, result_base, reg_info[lldb_rdi_x86_64]); 100 writeRegister(&context->r8, result_base, reg_info[lldb_r8_x86_64]); 101 writeRegister(&context->r9, result_base, reg_info[lldb_r9_x86_64]); 102 writeRegister(&context->r10, result_base, reg_info[lldb_r10_x86_64]); 103 writeRegister(&context->r11, result_base, reg_info[lldb_r11_x86_64]); 104 writeRegister(&context->r12, result_base, reg_info[lldb_r12_x86_64]); 105 writeRegister(&context->r13, result_base, reg_info[lldb_r13_x86_64]); 106 writeRegister(&context->r14, result_base, reg_info[lldb_r14_x86_64]); 107 writeRegister(&context->r15, result_base, reg_info[lldb_r15_x86_64]); 108 } 109 110 // TODO parse the floating point registers 111 112 return result_context_buf; 113 } 114