contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextNetBSD_x86_64.cpp

   1 //===-- RegisterContextNetBSD_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 #include "RegisterContextNetBSD_x86_64.h"
  11 #include "RegisterContextPOSIX_x86.h"
  12 #include "llvm/ADT/Triple.h"
  13 #include "llvm/Support/Compiler.h"
  14 #include <cassert>
  15 #include <cstddef>
  16
  17 using namespace lldb_private;
  18 using namespace lldb;
  19
  20 // src/sys/arch/amd64/include/frame_regs.h
  21 typedef struct _GPR {
  22   uint64_t rdi;    /*  0 */
  23   uint64_t rsi;    /*  1 */
  24   uint64_t rdx;    /*  2 */
  25   uint64_t rcx;    /*  3 */
  26   uint64_t r8;     /*  4 */
  27   uint64_t r9;     /*  5 */
  28   uint64_t r10;    /*  6 */
  29   uint64_t r11;    /*  7 */
  30   uint64_t r12;    /*  8 */
  31   uint64_t r13;    /*  9 */
  32   uint64_t r14;    /* 10 */
  33   uint64_t r15;    /* 11 */
  34   uint64_t rbp;    /* 12 */
  35   uint64_t rbx;    /* 13 */
  36   uint64_t rax;    /* 14 */
  37   uint64_t gs;     /* 15 */
  38   uint64_t fs;     /* 16 */
  39   uint64_t es;     /* 17 */
  40   uint64_t ds;     /* 18 */
  41   uint64_t trapno; /* 19 */
  42   uint64_t err;    /* 20 */
  43   uint64_t rip;    /* 21 */
  44   uint64_t cs;     /* 22 */
  45   uint64_t rflags; /* 23 */
  46   uint64_t rsp;    /* 24 */
  47   uint64_t ss;     /* 25 */
  48 } GPR;
  49
  50 struct DBG {
  51   uint64_t dr[16]; /* debug registers */
  52                    /* Index 0-3: debug address registers */
  53                    /* Index 4-5: reserved */
  54                    /* Index 6: debug status */
  55                    /* Index 7: debug control */
  56                    /* Index 8-15: reserved */
  57 };
  58
  59 /*
  60  * src/sys/arch/amd64/include/mcontext.h
  61  *
  62  * typedef struct {
  63  *       __gregset_t     __gregs;
  64  *       __greg_t        _mc_tlsbase;
  65  *       __fpregset_t    __fpregs;
  66  * } mcontext_t;
  67  */
  68
  69 struct UserArea {
  70   GPR gpr;
  71   uint64_t mc_tlsbase;
  72   FPR fpr;
  73   DBG dbg;
  74 };
  75
  76 #define DR_OFFSET(reg_index)                                                   \
  77   (LLVM_EXTENSION offsetof(UserArea, dbg) +                                    \
  78    LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
  79
  80
  81 //---------------------------------------------------------------------------
  82 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
  83 // structure.
  84 //---------------------------------------------------------------------------
  85 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
  86 #include "RegisterInfos_x86_64.h"
  87 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
  88
  89 static const RegisterInfo *
  90 PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  91   switch (target_arch.GetMachine()) {
  92   case llvm::Triple::x86_64:
  93     return g_register_infos_x86_64;
  94   default:
  95     assert(false && "Unhandled target architecture.");
  96     return nullptr;
  97   }
  98 }
  99
 100 static uint32_t
 101 PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch) {
 102   switch (target_arch.GetMachine()) {
 103   case llvm::Triple::x86_64:
 104     return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
 105                                  sizeof(g_register_infos_x86_64[0]));
 106   default:
 107     assert(false && "Unhandled target architecture.");
 108     return 0;
 109   }
 110 }
 111
 112 RegisterContextNetBSD_x86_64::RegisterContextNetBSD_x86_64(
 113     const ArchSpec &target_arch)
 114     : lldb_private::RegisterInfoInterface(target_arch),
 115       m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),
 116       m_register_count(PrivateGetRegisterCount(target_arch)) {}
 117
 118 size_t RegisterContextNetBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }
 119
 120 const RegisterInfo *RegisterContextNetBSD_x86_64::GetRegisterInfo() const {
 121   return m_register_info_p;
 122 }
 123
 124 uint32_t RegisterContextNetBSD_x86_64::GetRegisterCount() const {
 125   return m_register_count;
 126 }