1//===-- RegisterContextMinidump_x86_32.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_32.h"
10
11#include "lldb/Utility/DataBufferHeap.h"
12
13// C includes
14// C++ includes
15
16using namespace lldb_private;
17using namespace minidump;
18
19static 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
24lldb::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::DataBufferSP 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}
97