lldb/source/Plugins/Process/minidump/RegisterContextMinidump_x86_32.cpp

   1 //===-- RegisterContextMinidump_x86_32.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "RegisterContextMinidump_x86_32.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 void writeRegister(const void *reg_src,
  20                           llvm::MutableArrayRef<uint8_t> reg_dest) {
  21   memcpy(reg_dest.data(), reg_src, reg_dest.size());
  22 }
  23
  24 lldb::DataBufferSP lldb_private::minidump::ConvertMinidumpContext_x86_32(
  25     llvm::ArrayRef<uint8_t> source_data,
  26     RegisterInfoInterface *target_reg_interface) {
  27
  28   const RegisterInfo *reg_info = target_reg_interface->GetRegisterInfo();
  29
  30   lldb::WritableDataBufferSP result_context_buf(
  31       new DataBufferHeap(target_reg_interface->GetGPRSize(), 0));
  32   uint8_t *result_base = result_context_buf->GetBytes();
  33
  34   if (source_data.size() < sizeof(MinidumpContext_x86_32))
  35     return nullptr;
  36
  37   const MinidumpContext_x86_32 *context;
  38   consumeObject(source_data, context);
  39
  40   const MinidumpContext_x86_32_Flags context_flags =
  41       static_cast<MinidumpContext_x86_32_Flags>(
  42           static_cast<uint32_t>(context->context_flags));
  43   auto x86_32_Flag = MinidumpContext_x86_32_Flags::x86_32_Flag;
  44   auto ControlFlag = MinidumpContext_x86_32_Flags::Control;
  45   auto IntegerFlag = MinidumpContext_x86_32_Flags::Integer;
  46   auto SegmentsFlag = MinidumpContext_x86_32_Flags::Segments;
  47
  48   if ((context_flags & x86_32_Flag) != x86_32_Flag) {
  49     return nullptr;
  50   }
  51
  52   if ((context_flags & ControlFlag) == ControlFlag) {
  53     writeRegister(&context->ebp,
  54                   reg_info[lldb_ebp_i386].mutable_data(result_base));
  55     writeRegister(&context->eip,
  56                   reg_info[lldb_eip_i386].mutable_data(result_base));
  57     writeRegister(&context->cs,
  58                   reg_info[lldb_cs_i386].mutable_data(result_base));
  59     writeRegister(&context->eflags,
  60                   reg_info[lldb_eflags_i386].mutable_data(result_base));
  61     writeRegister(&context->esp,
  62                   reg_info[lldb_esp_i386].mutable_data(result_base));
  63     writeRegister(&context->ss,
  64                   reg_info[lldb_ss_i386].mutable_data(result_base));
  65   }
  66
  67   if ((context_flags & SegmentsFlag) == SegmentsFlag) {
  68     writeRegister(&context->ds,
  69                   reg_info[lldb_ds_i386].mutable_data(result_base));
  70     writeRegister(&context->es,
  71                   reg_info[lldb_es_i386].mutable_data(result_base));
  72     writeRegister(&context->fs,
  73                   reg_info[lldb_fs_i386].mutable_data(result_base));
  74     writeRegister(&context->gs,
  75                   reg_info[lldb_gs_i386].mutable_data(result_base));
  76   }
  77
  78   if ((context_flags & IntegerFlag) == IntegerFlag) {
  79     writeRegister(&context->eax,
  80                   reg_info[lldb_eax_i386].mutable_data(result_base));
  81     writeRegister(&context->ecx,
  82                   reg_info[lldb_ecx_i386].mutable_data(result_base));
  83     writeRegister(&context->edx,
  84                   reg_info[lldb_edx_i386].mutable_data(result_base));
  85     writeRegister(&context->ebx,
  86                   reg_info[lldb_ebx_i386].mutable_data(result_base));
  87     writeRegister(&context->esi,
  88                   reg_info[lldb_esi_i386].mutable_data(result_base));
  89     writeRegister(&context->edi,
  90                   reg_info[lldb_edi_i386].mutable_data(result_base));
  91   }
  92
  93   // TODO parse the floating point registers
  94
  95   return result_context_buf;
  96 }