RegisterContextLinux_x86_64.cpp
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//===-- RegisterContextLinux_x86_64.cpp -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
#include "RegisterContextLinux_x86_64.h"
#include "RegisterContextLinux_i386.h"
#include "RegisterContextPOSIX_x86.h"
#include <vector>
using namespace lldb_private;
using namespace lldb;
typedef struct _GPR {
uint64_t r15;
uint64_t r14;
uint64_t r13;
uint64_t r12;
uint64_t rbp;
uint64_t rbx;
uint64_t r11;
uint64_t r10;
uint64_t r9;
uint64_t r8;
uint64_t rax;
uint64_t rcx;
uint64_t rdx;
uint64_t rsi;
uint64_t rdi;
uint64_t orig_rax;
uint64_t rip;
uint64_t cs;
uint64_t rflags;
uint64_t rsp;
uint64_t ss;
uint64_t fs_base;
uint64_t gs_base;
uint64_t ds;
uint64_t es;
uint64_t fs;
uint64_t gs;
} GPR;
struct DBG {
uint64_t dr[8];
};
struct UserArea {
GPR gpr; // General purpose registers.
int32_t fpvalid; // True if FPU is being used.
int32_t pad0;
FXSAVE fpr; // General purpose floating point registers (see FPR for extended
// register sets).
uint64_t tsize; // Text segment size.
uint64_t dsize; // Data segment size.
uint64_t ssize; // Stack segment size.
uint64_t start_code; // VM address of text.
uint64_t start_stack; // VM address of stack bottom (top in rsp).
int64_t signal; // Signal causing core dump.
int32_t reserved; // Unused.
int32_t pad1;
uint64_t ar0; // Location of GPR's.
FXSAVE *fpstate; // Location of FPR's.
uint64_t magic; // Identifier for core dumps.
char u_comm[32]; // Command causing core dump.
DBG dbg; // Debug registers.
uint64_t error_code; // CPU error code.
uint64_t fault_address; // Control register CR3.
};
#define DR_OFFSET(reg_index) \
(LLVM_EXTENSION offsetof(UserArea, dbg) + \
LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
// Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
// structure.
#define DECLARE_REGISTER_INFOS_X86_64_STRUCT
#include "RegisterInfos_x86_64.h"
#undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
static std::vector<lldb_private::RegisterInfo> &GetPrivateRegisterInfoVector() {
static std::vector<lldb_private::RegisterInfo> g_register_infos;
return g_register_infos;
}
static const RegisterInfo *
GetRegisterInfo_i386(const lldb_private::ArchSpec &arch) {
std::vector<lldb_private::RegisterInfo> &g_register_infos =
GetPrivateRegisterInfoVector();
// Allocate RegisterInfo only once
if (g_register_infos.empty()) {
// Copy the register information from base class
std::unique_ptr<RegisterContextLinux_i386> reg_interface(
new RegisterContextLinux_i386(arch));
const RegisterInfo *base_info = reg_interface->GetRegisterInfo();
g_register_infos.insert(g_register_infos.end(), &base_info[0],
&base_info[k_num_registers_i386]);
// Include RegisterInfos_x86_64 to update the g_register_infos structure
// with x86_64 offsets.
#define UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
#include "RegisterInfos_x86_64.h"
#undef UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
}
return &g_register_infos[0];
}
static const RegisterInfo *GetRegisterInfoPtr(const ArchSpec &target_arch) {
switch (target_arch.GetMachine()) {
case llvm::Triple::x86:
return GetRegisterInfo_i386(target_arch);
case llvm::Triple::x86_64:
return g_register_infos_x86_64;
default:
assert(false && "Unhandled target architecture.");
return nullptr;
}
}
static uint32_t GetRegisterInfoCount(const ArchSpec &target_arch) {
switch (target_arch.GetMachine()) {
case llvm::Triple::x86: {
assert(!GetPrivateRegisterInfoVector().empty() &&
"i386 register info not yet filled.");
return static_cast<uint32_t>(GetPrivateRegisterInfoVector().size());
}
case llvm::Triple::x86_64:
return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
sizeof(g_register_infos_x86_64[0]));
default:
assert(false && "Unhandled target architecture.");
return 0;
}
}
static uint32_t GetUserRegisterInfoCount(const ArchSpec &target_arch) {
switch (target_arch.GetMachine()) {
case llvm::Triple::x86:
return static_cast<uint32_t>(k_num_user_registers_i386);
case llvm::Triple::x86_64:
return static_cast<uint32_t>(k_num_user_registers_x86_64);
default:
assert(false && "Unhandled target architecture.");
return 0;
}
}
RegisterContextLinux_x86_64::RegisterContextLinux_x86_64(
const ArchSpec &target_arch)
: lldb_private::RegisterInfoInterface(target_arch),
m_register_info_p(GetRegisterInfoPtr(target_arch)),
m_register_info_count(GetRegisterInfoCount(target_arch)),
m_user_register_count(GetUserRegisterInfoCount(target_arch)) {
RegisterInfo orig_ax = {"orig_rax",
nullptr,
sizeof(((GPR *)nullptr)->orig_rax),
(LLVM_EXTENSION offsetof(GPR, orig_rax)),
eEncodingUint,
eFormatHex,
{LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
LLDB_INVALID_REGNUM},
nullptr,
nullptr,
nullptr,
0};
d_register_infos.push_back(orig_ax);
}
size_t RegisterContextLinux_x86_64::GetGPRSize() const { return sizeof(GPR); }
const std::vector<lldb_private::RegisterInfo> *
RegisterContextLinux_x86_64::GetDynamicRegisterInfoP() const {
return &d_register_infos;
}
const RegisterInfo *RegisterContextLinux_x86_64::GetRegisterInfo() const {
return m_register_info_p;
}
uint32_t RegisterContextLinux_x86_64::GetRegisterCount() const {
return m_register_info_count;
}
uint32_t RegisterContextLinux_x86_64::GetUserRegisterCount() const {
return m_user_register_count;
}