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//===-- RegisterContextLinux_x86_64.h --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===---------------------------------------------------------------------===//
#include "llvm/Support/Compiler.h"
#include "RegisterContextLinux_x86_64.h"
#include <vector>
using namespace lldb_private;
// Computes the offset of the given GPR in the user data area.
#define GPR_OFFSET(regname) \
(offsetof(GPR, regname))
// Update the Linux specific information (offset and size).
#define UPDATE_GPR_INFO(reg) \
do { \
GetRegisterContext()[gpr_##reg].byte_size = sizeof(GPR::reg); \
GetRegisterContext()[gpr_##reg].byte_offset = GPR_OFFSET(reg); \
} while(false);
#define UPDATE_I386_GPR_INFO(i386_reg, reg) \
do { \
GetRegisterContext()[gpr_##i386_reg].byte_offset = GPR_OFFSET(reg); \
} while(false);
#define DR_OFFSET(reg_index) \
(LLVM_EXTENSION offsetof(UserArea, u_debugreg[reg_index]))
#define UPDATE_DR_INFO(reg_index) \
do { \
GetRegisterContext()[dr##reg_index].byte_size = sizeof(UserArea::u_debugreg[0]); \
GetRegisterContext()[dr##reg_index].byte_offset = DR_OFFSET(reg_index); \
} while(false);
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_ax;
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;
typedef RegisterContext_x86_64::FXSAVE FXSAVE;
struct UserArea
{
GPR gpr; // General purpose registers.
int32_t fpvalid; // True if FPU is being used.
int32_t pad0;
FXSAVE i387; // 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.
uint64_t u_debugreg[8]; // Debug registers (DR0 - DR7).
uint64_t error_code; // CPU error code.
uint64_t fault_address; // Control register CR3.
};
// Use a singleton function to avoid global constructors in shared libraries.
static std::vector<RegisterInfo> & GetRegisterContext () {
static std::vector<RegisterInfo> g_register_infos;
return g_register_infos;
}
RegisterContextLinux_x86_64::RegisterContextLinux_x86_64(Thread &thread, uint32_t concrete_frame_idx):
RegisterContext_x86_64(thread, concrete_frame_idx)
{
}
size_t
RegisterContextLinux_x86_64::GetGPRSize()
{
return sizeof(GPR);
}
const RegisterInfo *
RegisterContextLinux_x86_64::GetRegisterInfo()
{
// Allocate RegisterInfo only once
if (GetRegisterContext().empty())
{
// Copy the register information from base class
const RegisterInfo *base_info = RegisterContext_x86_64::GetRegisterInfo();
if (base_info)
{
GetRegisterContext().insert(GetRegisterContext().end(), &base_info[0], &base_info[k_num_registers]);
// Update the Linux specific register information (offset and size).
UpdateRegisterInfo();
}
}
return &GetRegisterContext()[0];
}
void
RegisterContextLinux_x86_64::UpdateRegisterInfo()
{
UPDATE_GPR_INFO(rax);
UPDATE_GPR_INFO(rbx);
UPDATE_GPR_INFO(rcx);
UPDATE_GPR_INFO(rdx);
UPDATE_GPR_INFO(rdi);
UPDATE_GPR_INFO(rsi);
UPDATE_GPR_INFO(rbp);
UPDATE_GPR_INFO(rsp);
UPDATE_GPR_INFO(r8);
UPDATE_GPR_INFO(r9);
UPDATE_GPR_INFO(r10);
UPDATE_GPR_INFO(r11);
UPDATE_GPR_INFO(r12);
UPDATE_GPR_INFO(r13);
UPDATE_GPR_INFO(r14);
UPDATE_GPR_INFO(r15);
UPDATE_GPR_INFO(rip);
UPDATE_GPR_INFO(rflags);
UPDATE_GPR_INFO(cs);
UPDATE_GPR_INFO(fs);
UPDATE_GPR_INFO(gs);
UPDATE_GPR_INFO(ss);
UPDATE_GPR_INFO(ds);
UPDATE_GPR_INFO(es);
UPDATE_I386_GPR_INFO(eax, rax);
UPDATE_I386_GPR_INFO(ebx, rbx);
UPDATE_I386_GPR_INFO(ecx, rcx);
UPDATE_I386_GPR_INFO(edx, rdx);
UPDATE_I386_GPR_INFO(edi, rdi);
UPDATE_I386_GPR_INFO(esi, rsi);
UPDATE_I386_GPR_INFO(ebp, rbp);
UPDATE_I386_GPR_INFO(esp, rsp);
UPDATE_I386_GPR_INFO(eip, rip);
UPDATE_I386_GPR_INFO(eflags, rflags);
UPDATE_DR_INFO(0);
UPDATE_DR_INFO(1);
UPDATE_DR_INFO(2);
UPDATE_DR_INFO(3);
UPDATE_DR_INFO(4);
UPDATE_DR_INFO(5);
UPDATE_DR_INFO(6);
UPDATE_DR_INFO(7);
}
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