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7cc3494deabb58d810cb1e56636d033572ae4ee4
clang-p2996/lldb/source/Plugins/Process/Windows/x64/RegisterContextWindows_x64.cpp
Zachary Turner 7cc3494dea [Windows] Add a RegisterContextWindows_x64. 
With this patch, LLDB can debug x64 executables on Windows with
the same level of functionality as for x86 executables.

llvm-svn: 235935
2015-04-27 22:58:57 +00:00

324 lines
11 KiB
C++
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//===-- RegisterContextWindows_x64.cpp --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/lldb-private-types.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/windows.h"
#include "lldb-x86-register-enums.h"
#include "RegisterContext_x86.h"
#include "RegisterContextWindows_x64.h"
#include "TargetThreadWindows.h"
#include "llvm/ADT/STLExtras.h"
using namespace lldb;
using namespace lldb_private;
#define DEFINE_GPR(reg, alt) #reg, alt, 8, 0, eEncodingUint, eFormatHexUppercase
#define DEFINE_GPR_BIN(reg, alt) #reg, alt, 8, 0, eEncodingUint, eFormatBinary
namespace
{
// This enum defines the layout of the global RegisterInfo array. This is necessary because
// lldb register sets are defined in terms of indices into the register array. As such, the
// order of RegisterInfos defined in global registers array must match the order defined here.
// When defining the register set layouts, these values can appear in an arbitrary order, and that
// determines the order that register values are displayed in a dump.
enum RegisterIndex
{
eRegisterIndexRax,
eRegisterIndexRbx,
eRegisterIndexRcx,
eRegisterIndexRdx,
eRegisterIndexRdi,
eRegisterIndexRsi,
eRegisterIndexR8,
eRegisterIndexR9,
eRegisterIndexR10,
eRegisterIndexR11,
eRegisterIndexR12,
eRegisterIndexR13,
eRegisterIndexR14,
eRegisterIndexR15,
eRegisterIndexRbp,
eRegisterIndexRsp,
eRegisterIndexRip,
eRegisterIndexRflags
};
// Array of all register information supported by Windows x86
RegisterInfo g_register_infos[] = {
// Macro auto defines most stuff GCC DWARF GENERIC
// GDB LLDB VALUE REGS INVALIDATE REGS
// ================================ ========================= ====================== =========================
// =================== ================= ========== ===============
{DEFINE_GPR(rax, nullptr),
{gcc_dwarf_rax_x86_64, gcc_dwarf_rax_x86_64, LLDB_INVALID_REGNUM, gdb_rax_x86_64, lldb_rax_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rbx, nullptr),
{gcc_dwarf_rbx_x86_64, gcc_dwarf_rbx_x86_64, LLDB_INVALID_REGNUM, gdb_rbx_x86_64, lldb_rbx_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rcx, nullptr),
{gcc_dwarf_rcx_x86_64, gcc_dwarf_rcx_x86_64, LLDB_INVALID_REGNUM, gdb_rcx_x86_64, lldb_rcx_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rdx, nullptr),
{gcc_dwarf_rdx_x86_64, gcc_dwarf_rdx_x86_64, LLDB_INVALID_REGNUM, gdb_rdx_x86_64, lldb_rdx_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rdi, nullptr),
{gcc_dwarf_rdi_x86_64, gcc_dwarf_rdi_x86_64, LLDB_INVALID_REGNUM, gdb_rdi_x86_64, lldb_rdi_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rsi, nullptr),
{gcc_dwarf_rsi_x86_64, gcc_dwarf_rsi_x86_64, LLDB_INVALID_REGNUM, gdb_rsi_x86_64, lldb_rsi_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r8, nullptr),
{gcc_dwarf_r8_x86_64, gcc_dwarf_r8_x86_64, LLDB_INVALID_REGNUM, gdb_r8_x86_64, lldb_r8_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r9, nullptr),
{gcc_dwarf_r9_x86_64, gcc_dwarf_r9_x86_64, LLDB_INVALID_REGNUM, gdb_r9_x86_64, lldb_r9_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r10, nullptr),
{gcc_dwarf_r10_x86_64, gcc_dwarf_r10_x86_64, LLDB_INVALID_REGNUM, gdb_r10_x86_64, lldb_r10_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r11, nullptr),
{gcc_dwarf_r11_x86_64, gcc_dwarf_r11_x86_64, LLDB_INVALID_REGNUM, gdb_r11_x86_64, lldb_r11_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r12, nullptr),
{gcc_dwarf_r12_x86_64, gcc_dwarf_r12_x86_64, LLDB_INVALID_REGNUM, gdb_r12_x86_64, lldb_r12_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r13, nullptr),
{gcc_dwarf_r13_x86_64, gcc_dwarf_r13_x86_64, LLDB_INVALID_REGNUM, gdb_r13_x86_64, lldb_r13_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r14, nullptr),
{gcc_dwarf_r14_x86_64, gcc_dwarf_r14_x86_64, LLDB_INVALID_REGNUM, gdb_r14_x86_64, lldb_r14_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(r15, nullptr),
{gcc_dwarf_r15_x86_64, gcc_dwarf_r15_x86_64, LLDB_INVALID_REGNUM, gdb_r15_x86_64, lldb_r15_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rbp, "fp"),
{gcc_dwarf_rbp_x86_64, gcc_dwarf_rbp_x86_64, LLDB_REGNUM_GENERIC_FP, gdb_rbp_x86_64, lldb_rbp_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rsp, "sp"),
{gcc_dwarf_rsp_x86_64, gcc_dwarf_rsp_x86_64, LLDB_REGNUM_GENERIC_SP, gdb_rsp_x86_64, lldb_rsp_x86_64},
nullptr,
nullptr},
{DEFINE_GPR(rip, "pc"),
{gcc_dwarf_rip_x86_64, gcc_dwarf_rip_x86_64, LLDB_REGNUM_GENERIC_PC, gdb_rip_x86_64, lldb_rip_x86_64},
nullptr,
nullptr},
{DEFINE_GPR_BIN(eflags, "flags"),
{LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_REGNUM_GENERIC_FLAGS, gdb_rflags_x86_64, lldb_rflags_x86_64},
nullptr,
nullptr},
};
// Array of lldb register numbers used to define the set of all General Purpose Registers
uint32_t g_gpr_reg_indices[] = {eRegisterIndexRax, eRegisterIndexRbx, eRegisterIndexRcx, eRegisterIndexRdx,
eRegisterIndexRdi, eRegisterIndexRsi, eRegisterIndexR8, eRegisterIndexR9,
eRegisterIndexR10, eRegisterIndexR11, eRegisterIndexR12, eRegisterIndexR13,
eRegisterIndexR14, eRegisterIndexR15, eRegisterIndexRbp, eRegisterIndexRsp,
eRegisterIndexRip, eRegisterIndexRflags};
RegisterSet g_register_sets[] = {
{"General Purpose Registers", "gpr", llvm::array_lengthof(g_gpr_reg_indices), g_gpr_reg_indices},
};
}
//------------------------------------------------------------------
// Constructors and Destructors
//------------------------------------------------------------------
RegisterContextWindows_x64::RegisterContextWindows_x64(Thread &thread, uint32_t concrete_frame_idx)
: RegisterContextWindows(thread, concrete_frame_idx)
{
}
RegisterContextWindows_x64::~RegisterContextWindows_x64()
{
}
size_t
RegisterContextWindows_x64::GetRegisterCount()
{
return llvm::array_lengthof(g_register_infos);
}
const RegisterInfo *
RegisterContextWindows_x64::GetRegisterInfoAtIndex(size_t reg)
{
return &g_register_infos[reg];
}
size_t
RegisterContextWindows_x64::GetRegisterSetCount()
{
return llvm::array_lengthof(g_register_sets);
}
const RegisterSet *
RegisterContextWindows_x64::GetRegisterSet(size_t reg_set)
{
return &g_register_sets[reg_set];
}
bool
RegisterContextWindows_x64::ReadRegister(const RegisterInfo *reg_info, RegisterValue &reg_value)
{
if (!CacheAllRegisterValues())
return false;
switch (reg_info->kinds[eRegisterKindLLDB])
{
case lldb_rax_x86_64:
reg_value.SetUInt64(m_context.Rax);
break;
case lldb_rbx_x86_64:
reg_value.SetUInt64(m_context.Rbx);
break;
case lldb_rcx_x86_64:
reg_value.SetUInt64(m_context.Rcx);
break;
case lldb_rdx_x86_64:
reg_value.SetUInt64(m_context.Rdx);
break;
case lldb_rdi_x86_64:
reg_value.SetUInt64(m_context.Rdi);
break;
case lldb_rsi_x86_64:
reg_value.SetUInt64(m_context.Rsi);
break;
case lldb_r8_x86_64:
reg_value.SetUInt64(m_context.R8);
break;
case lldb_r9_x86_64:
reg_value.SetUInt64(m_context.R9);
break;
case lldb_r10_x86_64:
reg_value.SetUInt64(m_context.R10);
break;
case lldb_r11_x86_64:
reg_value.SetUInt64(m_context.R11);
break;
case lldb_r12_x86_64:
reg_value.SetUInt64(m_context.R12);
break;
case lldb_r13_x86_64:
reg_value.SetUInt64(m_context.R13);
break;
case lldb_r14_x86_64:
reg_value.SetUInt64(m_context.R14);
break;
case lldb_r15_x86_64:
reg_value.SetUInt64(m_context.R15);
break;
case lldb_rbp_x86_64:
reg_value.SetUInt64(m_context.Rbp);
break;
case lldb_rsp_x86_64:
reg_value.SetUInt64(m_context.Rsp);
break;
case lldb_rip_x86_64:
reg_value.SetUInt64(m_context.Rip);
break;
case lldb_rflags_x86_64:
reg_value.SetUInt64(m_context.EFlags);
break;
}
return true;
}
bool
RegisterContextWindows_x64::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &reg_value)
{
// Since we cannot only write a single register value to the inferior, we need to make sure
// our cached copy of the register values are fresh. Otherwise when writing EAX, for example,
// we may also overwrite some other register with a stale value.
if (!CacheAllRegisterValues())
return false;
switch (reg_info->kinds[eRegisterKindLLDB])
{
case lldb_rax_x86_64:
m_context.Rax = reg_value.GetAsUInt64();
break;
case lldb_rbx_x86_64:
m_context.Rbx = reg_value.GetAsUInt64();
break;
case lldb_rcx_x86_64:
m_context.Rcx = reg_value.GetAsUInt64();
break;
case lldb_rdx_x86_64:
m_context.Rdx = reg_value.GetAsUInt64();
break;
case lldb_rdi_x86_64:
m_context.Rdi = reg_value.GetAsUInt64();
break;
case lldb_rsi_x86_64:
m_context.Rsi = reg_value.GetAsUInt64();
break;
case lldb_r8_x86_64:
m_context.R8 = reg_value.GetAsUInt64();
break;
case lldb_r9_x86_64:
m_context.R9 = reg_value.GetAsUInt64();
break;
case lldb_r10_x86_64:
m_context.R10 = reg_value.GetAsUInt64();
break;
case lldb_r11_x86_64:
m_context.R11 = reg_value.GetAsUInt64();
break;
case lldb_r12_x86_64:
m_context.R12 = reg_value.GetAsUInt64();
break;
case lldb_r13_x86_64:
m_context.R13 = reg_value.GetAsUInt64();
break;
case lldb_r14_x86_64:
m_context.R14 = reg_value.GetAsUInt64();
break;
case lldb_r15_x86_64:
m_context.R15 = reg_value.GetAsUInt64();
break;
case lldb_rbp_x86_64:
m_context.Rbp = reg_value.GetAsUInt64();
break;
case lldb_rsp_x86_64:
m_context.Rsp = reg_value.GetAsUInt64();
break;
case lldb_rip_x86_64:
m_context.Rip = reg_value.GetAsUInt64();
break;
case lldb_rflags_x86_64:
m_context.EFlags = reg_value.GetAsUInt64();
break;
}
// Physically update the registers in the target process.
TargetThreadWindows &wthread = static_cast<TargetThreadWindows &>(m_thread);
return ::SetThreadContext(wthread.GetHostThread().GetNativeThread().GetSystemHandle(), &m_context);
}
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