1//===-- RegisterContextLinux_i386.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#include "RegisterContextPOSIX_x86.h"
11#include "RegisterContextLinux_i386.h"
12
13using namespace lldb_private;
14using namespace lldb;
15
16struct GPR
17{
18    uint32_t ebx;
19    uint32_t ecx;
20    uint32_t edx;
21    uint32_t esi;
22    uint32_t edi;
23    uint32_t ebp;
24    uint32_t eax;
25    uint32_t ds;
26    uint32_t es;
27    uint32_t fs;
28    uint32_t gs;
29    uint32_t orig_ax;
30    uint32_t eip;
31    uint32_t cs;
32    uint32_t eflags;
33    uint32_t esp;
34    uint32_t ss;
35};
36
37struct UserArea
38{
39    GPR      regs;          // General purpose registers.
40    int32_t  fpvalid;       // True if FPU is being used.
41    FXSAVE   i387;          // FPU registers.
42    uint32_t tsize;         // Text segment size.
43    uint32_t dsize;         // Data segment size.
44    uint32_t ssize;         // Stack segment size.
45    uint32_t start_code;    // VM address of text.
46    uint32_t start_stack;   // VM address of stack bottom (top in rsp).
47    int32_t  signal;        // Signal causing core dump.
48    int32_t  reserved;      // Unused.
49    uint32_t ar0;           // Location of GPR's.
50    uint32_t fpstate;       // Location of FPR's. Should be a FXSTATE *, but this
51	                        //  has to be 32-bits even on 64-bit systems.
52    uint32_t magic;         // Identifier for core dumps.
53    char     u_comm[32];    // Command causing core dump.
54    uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
55};
56
57#define DR_SIZE sizeof(UserArea::u_debugreg[0])
58#define DR_OFFSET(reg_index) \
59    (LLVM_EXTENSION offsetof(UserArea, u_debugreg[reg_index]))
60
61//---------------------------------------------------------------------------
62// Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
63//---------------------------------------------------------------------------
64#define DECLARE_REGISTER_INFOS_I386_STRUCT
65#include "RegisterInfos_i386.h"
66#undef DECLARE_REGISTER_INFOS_I386_STRUCT
67
68RegisterContextLinux_i386::RegisterContextLinux_i386(const ArchSpec &target_arch) :
69    RegisterInfoInterface(target_arch)
70{
71}
72
73RegisterContextLinux_i386::~RegisterContextLinux_i386()
74{
75}
76
77size_t
78RegisterContextLinux_i386::GetGPRSize()
79{
80    return sizeof(GPR);
81}
82
83const RegisterInfo *
84RegisterContextLinux_i386::GetRegisterInfo()
85{
86    switch (m_target_arch.GetCore())
87    {
88        case ArchSpec::eCore_x86_32_i386:
89        case ArchSpec::eCore_x86_32_i486:
90        case ArchSpec::eCore_x86_32_i486sx:
91            return g_register_infos_i386;
92        default:
93            assert(false && "Unhandled target architecture.");
94            return NULL;
95    }
96}
97