contrib/llvm/tools/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_x86_32.h

   1 //===-- RegisterContextMinidump_x86_32.h ------------------------*- 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 #ifndef liblldb_RegisterContextMinidump_x86_32_h_
  11 #define liblldb_RegisterContextMinidump_x86_32_h_
  12
  13 #include "MinidumpTypes.h"
  14
  15 #include "Plugins/Process/Utility/RegisterInfoInterface.h"
  16 #include "Plugins/Process/Utility/lldb-x86-register-enums.h"
  17
  18 #include "lldb/Target/RegisterContext.h"
  19
  20 #include "llvm/ADT/ArrayRef.h"
  21 #include "llvm/ADT/BitmaskEnum.h"
  22 #include "llvm/Support/Endian.h"
  23
  24 // C includes
  25 // C++ includes
  26
  27 namespace lldb_private {
  28
  29 namespace minidump {
  30
  31 // This function receives an ArrayRef pointing to the bytes of the Minidump
  32 // register context and returns a DataBuffer that's ordered by the offsets
  33 // specified in the RegisterInfoInterface argument
  34 // This way we can reuse the already existing register contexts
  35 lldb::DataBufferSP
  36 ConvertMinidumpContext_x86_32(llvm::ArrayRef<uint8_t> source_data,
  37                               RegisterInfoInterface *target_reg_interface);
  38
  39 // Reference: see breakpad/crashpad source or WinNT.h
  40 struct MinidumpFloatingSaveAreaX86 {
  41   llvm::support::ulittle32_t control_word;
  42   llvm::support::ulittle32_t status_word;
  43   llvm::support::ulittle32_t tag_word;
  44   llvm::support::ulittle32_t error_offset;
  45   llvm::support::ulittle32_t error_selector;
  46   llvm::support::ulittle32_t data_offset;
  47   llvm::support::ulittle32_t data_selector;
  48
  49   enum {
  50     RegisterAreaSize = 80,
  51   };
  52   // register_area contains eight 80-bit (x87 "long double") quantities for
  53   // floating-point registers %st0 (%mm0) through %st7 (%mm7).
  54   uint8_t register_area[RegisterAreaSize];
  55   llvm::support::ulittle32_t cr0_npx_state;
  56 };
  57
  58 struct MinidumpContext_x86_32 {
  59   // The context_flags field determines which parts
  60   // of the structure are populated (have valid values)
  61   llvm::support::ulittle32_t context_flags;
  62
  63   // The next 6 registers are included with
  64   // MinidumpContext_x86_32_Flags::DebugRegisters
  65   llvm::support::ulittle32_t dr0;
  66   llvm::support::ulittle32_t dr1;
  67   llvm::support::ulittle32_t dr2;
  68   llvm::support::ulittle32_t dr3;
  69   llvm::support::ulittle32_t dr6;
  70   llvm::support::ulittle32_t dr7;
  71
  72   // The next field is included with
  73   // MinidumpContext_x86_32_Flags::FloatingPoint
  74   MinidumpFloatingSaveAreaX86 float_save;
  75
  76   // The next 4 registers are included with
  77   // MinidumpContext_x86_32_Flags::Segments
  78   llvm::support::ulittle32_t gs;
  79   llvm::support::ulittle32_t fs;
  80   llvm::support::ulittle32_t es;
  81   llvm::support::ulittle32_t ds;
  82
  83   // The next 6 registers are included with
  84   // MinidumpContext_x86_32_Flags::Integer
  85   llvm::support::ulittle32_t edi;
  86   llvm::support::ulittle32_t esi;
  87   llvm::support::ulittle32_t ebx;
  88   llvm::support::ulittle32_t edx;
  89   llvm::support::ulittle32_t ecx;
  90   llvm::support::ulittle32_t eax;
  91
  92   // The next 6 registers are included with
  93   // MinidumpContext_x86_32_Flags::Control
  94   llvm::support::ulittle32_t ebp;
  95   llvm::support::ulittle32_t eip;
  96   llvm::support::ulittle32_t cs;     // WinNT.h says "must be sanitized"
  97   llvm::support::ulittle32_t eflags; // WinNT.h says "must be sanitized"
  98   llvm::support::ulittle32_t esp;
  99   llvm::support::ulittle32_t ss;
 100
 101   // The next field is included with
 102   // MinidumpContext_x86_32_Flags::ExtendedRegisters
 103   // It contains vector (MMX/SSE) registers.  It it laid out in the
 104   // format used by the fxsave and fsrstor instructions, so it includes
 105   // a copy of the x87 floating-point registers as well.  See FXSAVE in
 106   // "Intel Architecture Software Developer's Manual, Volume 2."
 107   enum {
 108     ExtendedRegistersSize = 512,
 109   };
 110   uint8_t extended_registers[ExtendedRegistersSize];
 111 };
 112
 113 LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE();
 114
 115 // For context_flags. These values indicate the type of
 116 // context stored in the structure. The high 24 bits identify the CPU, the
 117 // low 8 bits identify the type of context saved.
 118 enum class MinidumpContext_x86_32_Flags : uint32_t {
 119   x86_32_Flag = 0x00010000, // CONTEXT_i386, CONTEXT_i486
 120   Control = x86_32_Flag | 0x00000001,
 121   Integer = x86_32_Flag | 0x00000002,
 122   Segments = x86_32_Flag | 0x00000004,
 123   FloatingPoint = x86_32_Flag | 0x00000008,
 124   DebugRegisters = x86_32_Flag | 0x00000010,
 125   ExtendedRegisters = x86_32_Flag | 0x00000020,
 126   XState = x86_32_Flag | 0x00000040,
 127
 128   Full = Control | Integer | Segments,
 129   All = Full | FloatingPoint | DebugRegisters | ExtendedRegisters,
 130
 131   LLVM_MARK_AS_BITMASK_ENUM(/* LargestValue = */ All)
 132 };
 133
 134 } // end namespace minidump
 135 } // end namespace lldb_private
 136 #endif // liblldb_RegisterContextMinidump_x86_32_h_