142 lines · cpp
1//===-- RegisterContextFreeBSD_x86_64.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-exception6//7//===---------------------------------------------------------------------===//8 9#include "RegisterContextFreeBSD_x86_64.h"10#include "RegisterContextFreeBSD_i386.h"11#include "RegisterContextPOSIX_x86.h"12#include "llvm/Support/Threading.h"13#include <vector>14 15using namespace lldb_private;16using namespace lldb;17 18// http://svnweb.freebsd.org/base/head/sys/x86/include/reg.h19typedef struct _GPR {20 uint64_t r15;21 uint64_t r14;22 uint64_t r13;23 uint64_t r12;24 uint64_t r11;25 uint64_t r10;26 uint64_t r9;27 uint64_t r8;28 uint64_t rdi;29 uint64_t rsi;30 uint64_t rbp;31 uint64_t rbx;32 uint64_t rdx;33 uint64_t rcx;34 uint64_t rax;35 uint32_t trapno;36 uint16_t fs;37 uint16_t gs;38 uint32_t err;39 uint16_t es;40 uint16_t ds;41 uint64_t rip;42 uint64_t cs;43 uint64_t rflags;44 uint64_t rsp;45 uint64_t ss;46} GPR;47 48struct DBG {49 uint64_t dr[16]; /* debug registers */50 /* Index 0-3: debug address registers */51 /* Index 4-5: reserved */52 /* Index 6: debug status */53 /* Index 7: debug control */54 /* Index 8-15: reserved */55};56 57struct UserArea {58 GPR gpr;59 FPR fpr;60 DBG dbg;61};62 63#define DR_OFFSET(reg_index) \64 (LLVM_EXTENSION offsetof(UserArea, dbg) + \65 LLVM_EXTENSION offsetof(DBG, dr[reg_index]))66 67// Include RegisterInfos_x86_64 to declare our g_register_infos_x86_6468// structure.69#define DECLARE_REGISTER_INFOS_X86_64_STRUCT70#include "RegisterInfos_x86_64.h"71#undef DECLARE_REGISTER_INFOS_X86_64_STRUCT72 73static std::vector<lldb_private::RegisterInfo> &74GetSharedRegisterInfoVector_i386(const lldb_private::ArchSpec &arch) {75 static std::vector<lldb_private::RegisterInfo> g_register_infos;76 static llvm::once_flag g_initialized;77 llvm::call_once(g_initialized, [&]() {78 if (g_register_infos.empty()) {79 // Copy the register information from base class80 std::unique_ptr<RegisterContextFreeBSD_i386> reg_interface(81 new RegisterContextFreeBSD_i386(arch));82 const RegisterInfo *base_info = reg_interface->GetRegisterInfo();83 g_register_infos.insert(g_register_infos.end(), &base_info[0],84 &base_info[k_num_registers_i386]);85 86// Include RegisterInfos_x86_64 to update the g_register_infos structure87// with x86_64 offsets.88#define UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS89#include "RegisterInfos_x86_64.h"90#undef UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS91 }92 });93 return g_register_infos;94}95 96static const RegisterInfo *97PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {98 switch (target_arch.GetMachine()) {99 case llvm::Triple::x86:100 return &GetSharedRegisterInfoVector_i386(target_arch)[0];101 case llvm::Triple::x86_64:102 return g_register_infos_x86_64;103 default:104 assert(false && "Unhandled target architecture.");105 return nullptr;106 }107}108 109static uint32_t110PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch) {111 switch (target_arch.GetMachine()) {112 case llvm::Triple::x86:113 // This vector should have already been filled.114 assert(!GetSharedRegisterInfoVector_i386(target_arch).empty() &&115 "i386 register info vector not filled.");116 return static_cast<uint32_t>(117 GetSharedRegisterInfoVector_i386(target_arch).size());118 case llvm::Triple::x86_64:119 return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /120 sizeof(g_register_infos_x86_64[0]));121 default:122 assert(false && "Unhandled target architecture.");123 return 0;124 }125}126 127RegisterContextFreeBSD_x86_64::RegisterContextFreeBSD_x86_64(128 const ArchSpec &target_arch)129 : lldb_private::RegisterInfoInterface(target_arch),130 m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),131 m_register_count(PrivateGetRegisterCount(target_arch)) {}132 133size_t RegisterContextFreeBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }134 135const RegisterInfo *RegisterContextFreeBSD_x86_64::GetRegisterInfo() const {136 return m_register_info_p;137}138 139uint32_t RegisterContextFreeBSD_x86_64::GetRegisterCount() const {140 return m_register_count;141}142