contrib/llvm/tools/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_x86_64.cpp

   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 &reg) {
  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 &reg) {
  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 }