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llvm-project/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp

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//===-- NativeRegisterContextLinux_x86_64.cpp ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "NativeRegisterContextLinux_x86_64.h"
#include "lldb/lldb-private-forward.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/RegisterValue.h"
#include "Host/common/NativeProcessProtocol.h"
#include "Host/common/NativeThreadProtocol.h"
#include "Plugins/Process/Linux/NativeProcessLinux.h"
using namespace lldb_private;
// ----------------------------------------------------------------------------
// Private namespace.
// ----------------------------------------------------------------------------
namespace
{
// x86 32-bit general purpose registers.
const uint32_t
g_gpr_regnums_i386[] =
{
lldb_eax_i386,
lldb_ebx_i386,
lldb_ecx_i386,
lldb_edx_i386,
lldb_edi_i386,
lldb_esi_i386,
lldb_ebp_i386,
lldb_esp_i386,
lldb_eip_i386,
lldb_eflags_i386,
lldb_cs_i386,
lldb_fs_i386,
lldb_gs_i386,
lldb_ss_i386,
lldb_ds_i386,
lldb_es_i386,
lldb_ax_i386,
lldb_bx_i386,
lldb_cx_i386,
lldb_dx_i386,
lldb_di_i386,
lldb_si_i386,
lldb_bp_i386,
lldb_sp_i386,
lldb_ah_i386,
lldb_bh_i386,
lldb_ch_i386,
lldb_dh_i386,
lldb_al_i386,
lldb_bl_i386,
lldb_cl_i386,
lldb_dl_i386,
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_gpr_regnums_i386) / sizeof(g_gpr_regnums_i386[0])) - 1 == k_num_gpr_registers_i386,
"g_gpr_regnums_i386 has wrong number of register infos");
// x86 32-bit floating point registers.
const uint32_t
g_fpu_regnums_i386[] =
{
lldb_fctrl_i386,
lldb_fstat_i386,
lldb_ftag_i386,
lldb_fop_i386,
lldb_fiseg_i386,
lldb_fioff_i386,
lldb_foseg_i386,
lldb_fooff_i386,
lldb_mxcsr_i386,
lldb_mxcsrmask_i386,
lldb_st0_i386,
lldb_st1_i386,
lldb_st2_i386,
lldb_st3_i386,
lldb_st4_i386,
lldb_st5_i386,
lldb_st6_i386,
lldb_st7_i386,
lldb_mm0_i386,
lldb_mm1_i386,
lldb_mm2_i386,
lldb_mm3_i386,
lldb_mm4_i386,
lldb_mm5_i386,
lldb_mm6_i386,
lldb_mm7_i386,
lldb_xmm0_i386,
lldb_xmm1_i386,
lldb_xmm2_i386,
lldb_xmm3_i386,
lldb_xmm4_i386,
lldb_xmm5_i386,
lldb_xmm6_i386,
lldb_xmm7_i386,
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_fpu_regnums_i386) / sizeof(g_fpu_regnums_i386[0])) - 1 == k_num_fpr_registers_i386,
"g_fpu_regnums_i386 has wrong number of register infos");
// x86 32-bit AVX registers.
const uint32_t
g_avx_regnums_i386[] =
{
lldb_ymm0_i386,
lldb_ymm1_i386,
lldb_ymm2_i386,
lldb_ymm3_i386,
lldb_ymm4_i386,
lldb_ymm5_i386,
lldb_ymm6_i386,
lldb_ymm7_i386,
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_avx_regnums_i386) / sizeof(g_avx_regnums_i386[0])) - 1 == k_num_avx_registers_i386,
" g_avx_regnums_i386 has wrong number of register infos");
// x86 64-bit general purpose registers.
static const
uint32_t g_gpr_regnums_x86_64[] =
{
lldb_rax_x86_64,
lldb_rbx_x86_64,
lldb_rcx_x86_64,
lldb_rdx_x86_64,
lldb_rdi_x86_64,
lldb_rsi_x86_64,
lldb_rbp_x86_64,
lldb_rsp_x86_64,
lldb_r8_x86_64,
lldb_r9_x86_64,
lldb_r10_x86_64,
lldb_r11_x86_64,
lldb_r12_x86_64,
lldb_r13_x86_64,
lldb_r14_x86_64,
lldb_r15_x86_64,
lldb_rip_x86_64,
lldb_rflags_x86_64,
lldb_cs_x86_64,
lldb_fs_x86_64,
lldb_gs_x86_64,
lldb_ss_x86_64,
lldb_ds_x86_64,
lldb_es_x86_64,
lldb_eax_x86_64,
lldb_ebx_x86_64,
lldb_ecx_x86_64,
lldb_edx_x86_64,
lldb_edi_x86_64,
lldb_esi_x86_64,
lldb_ebp_x86_64,
lldb_esp_x86_64,
lldb_r8d_x86_64, // Low 32 bits or r8
lldb_r9d_x86_64, // Low 32 bits or r9
lldb_r10d_x86_64, // Low 32 bits or r10
lldb_r11d_x86_64, // Low 32 bits or r11
lldb_r12d_x86_64, // Low 32 bits or r12
lldb_r13d_x86_64, // Low 32 bits or r13
lldb_r14d_x86_64, // Low 32 bits or r14
lldb_r15d_x86_64, // Low 32 bits or r15
lldb_ax_x86_64,
lldb_bx_x86_64,
lldb_cx_x86_64,
lldb_dx_x86_64,
lldb_di_x86_64,
lldb_si_x86_64,
lldb_bp_x86_64,
lldb_sp_x86_64,
lldb_r8w_x86_64, // Low 16 bits or r8
lldb_r9w_x86_64, // Low 16 bits or r9
lldb_r10w_x86_64, // Low 16 bits or r10
lldb_r11w_x86_64, // Low 16 bits or r11
lldb_r12w_x86_64, // Low 16 bits or r12
lldb_r13w_x86_64, // Low 16 bits or r13
lldb_r14w_x86_64, // Low 16 bits or r14
lldb_r15w_x86_64, // Low 16 bits or r15
lldb_ah_x86_64,
lldb_bh_x86_64,
lldb_ch_x86_64,
lldb_dh_x86_64,
lldb_al_x86_64,
lldb_bl_x86_64,
lldb_cl_x86_64,
lldb_dl_x86_64,
lldb_dil_x86_64,
lldb_sil_x86_64,
lldb_bpl_x86_64,
lldb_spl_x86_64,
lldb_r8l_x86_64, // Low 8 bits or r8
lldb_r9l_x86_64, // Low 8 bits or r9
lldb_r10l_x86_64, // Low 8 bits or r10
lldb_r11l_x86_64, // Low 8 bits or r11
lldb_r12l_x86_64, // Low 8 bits or r12
lldb_r13l_x86_64, // Low 8 bits or r13
lldb_r14l_x86_64, // Low 8 bits or r14
lldb_r15l_x86_64, // Low 8 bits or r15
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 1 == k_num_gpr_registers_x86_64,
"g_gpr_regnums_x86_64 has wrong number of register infos");
// x86 64-bit floating point registers.
static const uint32_t
g_fpu_regnums_x86_64[] =
{
lldb_fctrl_x86_64,
lldb_fstat_x86_64,
lldb_ftag_x86_64,
lldb_fop_x86_64,
lldb_fiseg_x86_64,
lldb_fioff_x86_64,
lldb_foseg_x86_64,
lldb_fooff_x86_64,
lldb_mxcsr_x86_64,
lldb_mxcsrmask_x86_64,
lldb_st0_x86_64,
lldb_st1_x86_64,
lldb_st2_x86_64,
lldb_st3_x86_64,
lldb_st4_x86_64,
lldb_st5_x86_64,
lldb_st6_x86_64,
lldb_st7_x86_64,
lldb_mm0_x86_64,
lldb_mm1_x86_64,
lldb_mm2_x86_64,
lldb_mm3_x86_64,
lldb_mm4_x86_64,
lldb_mm5_x86_64,
lldb_mm6_x86_64,
lldb_mm7_x86_64,
lldb_xmm0_x86_64,
lldb_xmm1_x86_64,
lldb_xmm2_x86_64,
lldb_xmm3_x86_64,
lldb_xmm4_x86_64,
lldb_xmm5_x86_64,
lldb_xmm6_x86_64,
lldb_xmm7_x86_64,
lldb_xmm8_x86_64,
lldb_xmm9_x86_64,
lldb_xmm10_x86_64,
lldb_xmm11_x86_64,
lldb_xmm12_x86_64,
lldb_xmm13_x86_64,
lldb_xmm14_x86_64,
lldb_xmm15_x86_64,
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_fpu_regnums_x86_64) / sizeof(g_fpu_regnums_x86_64[0])) - 1 == k_num_fpr_registers_x86_64,
"g_fpu_regnums_x86_64 has wrong number of register infos");
// x86 64-bit AVX registers.
static const uint32_t
g_avx_regnums_x86_64[] =
{
lldb_ymm0_x86_64,
lldb_ymm1_x86_64,
lldb_ymm2_x86_64,
lldb_ymm3_x86_64,
lldb_ymm4_x86_64,
lldb_ymm5_x86_64,
lldb_ymm6_x86_64,
lldb_ymm7_x86_64,
lldb_ymm8_x86_64,
lldb_ymm9_x86_64,
lldb_ymm10_x86_64,
lldb_ymm11_x86_64,
lldb_ymm12_x86_64,
lldb_ymm13_x86_64,
lldb_ymm14_x86_64,
lldb_ymm15_x86_64,
LLDB_INVALID_REGNUM // register sets need to end with this flag
};
static_assert((sizeof(g_avx_regnums_x86_64) / sizeof(g_avx_regnums_x86_64[0])) - 1 == k_num_avx_registers_x86_64,
"g_avx_regnums_x86_64 has wrong number of register infos");
// Number of register sets provided by this context.
enum
{
k_num_extended_register_sets = 1,
k_num_register_sets = 3
};
// Register sets for x86 32-bit.
static const RegisterSet
g_reg_sets_i386[k_num_register_sets] =
{
{ "General Purpose Registers", "gpr", k_num_gpr_registers_i386, g_gpr_regnums_i386 },
{ "Floating Point Registers", "fpu", k_num_fpr_registers_i386, g_fpu_regnums_i386 },
{ "Advanced Vector Extensions", "avx", k_num_avx_registers_i386, g_avx_regnums_i386 }
};
// Register sets for x86 64-bit.
static const RegisterSet
g_reg_sets_x86_64[k_num_register_sets] =
{
{ "General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, g_gpr_regnums_x86_64 },
{ "Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, g_fpu_regnums_x86_64 },
{ "Advanced Vector Extensions", "avx", k_num_avx_registers_x86_64, g_avx_regnums_x86_64 }
};
}
#define REG_CONTEXT_SIZE (GetRegisterInfoInterface ().GetGPRSize () + sizeof(FPR))
// ----------------------------------------------------------------------------
// Required ptrace defines.
// ----------------------------------------------------------------------------
// Support ptrace extensions even when compiled without required kernel support
#ifndef NT_X86_XSTATE
#define NT_X86_XSTATE 0x202
#endif
// ----------------------------------------------------------------------------
// NativeRegisterContextLinux_x86_64 members.
// ----------------------------------------------------------------------------
NativeRegisterContextLinux_x86_64::NativeRegisterContextLinux_x86_64 (NativeThreadProtocol &native_thread, uint32_t concrete_frame_idx, RegisterInfoInterface *reg_info_interface_p) :
NativeRegisterContextRegisterInfo (native_thread, concrete_frame_idx, reg_info_interface_p),
m_fpr_type (eFPRTypeNotValid),
m_fpr (),
m_iovec (),
m_ymm_set (),
m_reg_info (),
m_gpr_x86_64 ()
{
// Set up data about ranges of valid registers.
switch (reg_info_interface_p->GetTargetArchitecture ().GetMachine ())
{
case llvm::Triple::x86:
m_reg_info.num_registers = k_num_registers_i386;
m_reg_info.num_gpr_registers = k_num_gpr_registers_i386;
m_reg_info.num_fpr_registers = k_num_fpr_registers_i386;
m_reg_info.num_avx_registers = k_num_avx_registers_i386;
m_reg_info.last_gpr = k_last_gpr_i386;
m_reg_info.first_fpr = k_first_fpr_i386;
m_reg_info.last_fpr = k_last_fpr_i386;
m_reg_info.first_st = lldb_st0_i386;
m_reg_info.last_st = lldb_st7_i386;
m_reg_info.first_mm = lldb_mm0_i386;
m_reg_info.last_mm = lldb_mm7_i386;
m_reg_info.first_xmm = lldb_xmm0_i386;
m_reg_info.last_xmm = lldb_xmm7_i386;
m_reg_info.first_ymm = lldb_ymm0_i386;
m_reg_info.last_ymm = lldb_ymm7_i386;
m_reg_info.first_dr = lldb_dr0_i386;
m_reg_info.gpr_flags = lldb_eflags_i386;
break;
case llvm::Triple::x86_64:
m_reg_info.num_registers = k_num_registers_x86_64;
m_reg_info.num_gpr_registers = k_num_gpr_registers_x86_64;
m_reg_info.num_fpr_registers = k_num_fpr_registers_x86_64;
m_reg_info.num_avx_registers = k_num_avx_registers_x86_64;
m_reg_info.last_gpr = k_last_gpr_x86_64;
m_reg_info.first_fpr = k_first_fpr_x86_64;
m_reg_info.last_fpr = k_last_fpr_x86_64;
m_reg_info.first_st = lldb_st0_x86_64;
m_reg_info.last_st = lldb_st7_x86_64;
m_reg_info.first_mm = lldb_mm0_x86_64;
m_reg_info.last_mm = lldb_mm7_x86_64;
m_reg_info.first_xmm = lldb_xmm0_x86_64;
m_reg_info.last_xmm = lldb_xmm15_x86_64;
m_reg_info.first_ymm = lldb_ymm0_x86_64;
m_reg_info.last_ymm = lldb_ymm15_x86_64;
m_reg_info.first_dr = lldb_dr0_x86_64;
m_reg_info.gpr_flags = lldb_rflags_x86_64;
break;
default:
assert(false && "Unhandled target architecture.");
break;
}
// Initialize m_iovec to point to the buffer and buffer size
// using the conventions of Berkeley style UIO structures, as required
// by PTRACE extensions.
m_iovec.iov_base = &m_fpr.xstate.xsave;
m_iovec.iov_len = sizeof(m_fpr.xstate.xsave);
// Clear out the FPR state.
::memset(&m_fpr, 0, sizeof(FPR));
}
// CONSIDER after local and llgs debugging are merged, register set support can
// be moved into a base x86-64 class with IsRegisterSetAvailable made virtual.
uint32_t
NativeRegisterContextLinux_x86_64::GetRegisterSetCount () const
{
uint32_t sets = 0;
for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index)
{
if (IsRegisterSetAvailable (set_index))
++sets;
}
return sets;
}
const lldb_private::RegisterSet *
NativeRegisterContextLinux_x86_64::GetRegisterSet (uint32_t set_index) const
{
if (!IsRegisterSetAvailable (set_index))
return nullptr;
switch (GetRegisterInfoInterface ().GetTargetArchitecture ().GetMachine ())
{
case llvm::Triple::x86:
return &g_reg_sets_i386[set_index];
case llvm::Triple::x86_64:
return &g_reg_sets_x86_64[set_index];
default:
assert (false && "Unhandled target architecture.");
return nullptr;
}
return nullptr;
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::ReadRegisterRaw (uint32_t reg_index, RegisterValue &reg_value)
{
Error error;
const RegisterInfo *const reg_info = GetRegisterInfoAtIndex (reg_index);
if (!reg_info)
{
error.SetErrorStringWithFormat ("register %" PRIu32 " not found", reg_index);
return error;
}
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
{
error.SetErrorString ("NativeProcessProtocol is NULL");
return error;
}
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
return process_p->ReadRegisterValue(m_thread.GetID(),
reg_info->byte_offset,
reg_info->name,
reg_info->byte_size,
reg_value);
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::ReadRegister (const RegisterInfo *reg_info, RegisterValue &reg_value)
{
Error error;
if (!reg_info)
{
error.SetErrorString ("reg_info NULL");
return error;
}
const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
if (reg == LLDB_INVALID_REGNUM)
{
// This is likely an internal register for lldb use only and should not be directly queried.
error.SetErrorStringWithFormat ("register \"%s\" is an internal-only lldb register, cannot read directly", reg_info->name);
return error;
}
if (IsFPR(reg, GetFPRType()))
{
if (!ReadFPR())
{
error.SetErrorString ("failed to read floating point register");
return error;
}
}
else
{
uint32_t full_reg = reg;
bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM);
if (is_subreg)
{
// Read the full aligned 64-bit register.
full_reg = reg_info->invalidate_regs[0];
}
error = ReadRegisterRaw(full_reg, reg_value);
if (error.Success ())
{
// If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right.
if (is_subreg && (reg_info->byte_offset & 0x1))
reg_value.SetUInt64(reg_value.GetAsUInt64() >> 8);
// If our return byte size was greater than the return value reg size, then
// use the type specified by reg_info rather than the uint64_t default
if (reg_value.GetByteSize() > reg_info->byte_size)
reg_value.SetType(reg_info);
}
return error;
}
if (reg_info->encoding == lldb::eEncodingVector)
{
lldb::ByteOrder byte_order = GetByteOrder();
if (byte_order != lldb::eByteOrderInvalid)
{
if (reg >= m_reg_info.first_st && reg <= m_reg_info.last_st)
reg_value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_st].bytes, reg_info->byte_size, byte_order);
if (reg >= m_reg_info.first_mm && reg <= m_reg_info.last_mm)
reg_value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_mm].bytes, reg_info->byte_size, byte_order);
if (reg >= m_reg_info.first_xmm && reg <= m_reg_info.last_xmm)
reg_value.SetBytes(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_xmm].bytes, reg_info->byte_size, byte_order);
if (reg >= m_reg_info.first_ymm && reg <= m_reg_info.last_ymm)
{
// Concatenate ymm using the register halves in xmm.bytes and ymmh.bytes
if (GetFPRType() == eFPRTypeXSAVE && CopyXSTATEtoYMM(reg, byte_order))
reg_value.SetBytes(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, reg_info->byte_size, byte_order);
else
{
error.SetErrorString ("failed to copy ymm register value");
return error;
}
}
if (reg_value.GetType() != RegisterValue::eTypeBytes)
error.SetErrorString ("write failed - type was expected to be RegisterValue::eTypeBytes");
return error;
}
error.SetErrorString ("byte order is invalid");
return error;
}
// Get pointer to m_fpr.xstate.fxsave variable and set the data from it.
assert (reg_info->byte_offset < sizeof(m_fpr));
uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset;
switch (reg_info->byte_size)
{
case 2:
reg_value.SetUInt16(*(uint16_t *)src);
break;
case 4:
reg_value.SetUInt32(*(uint32_t *)src);
break;
case 8:
reg_value.SetUInt64(*(uint64_t *)src);
break;
default:
assert(false && "Unhandled data size.");
error.SetErrorStringWithFormat ("unhandled byte size: %" PRIu32, reg_info->byte_size);
break;
}
return error;
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::WriteRegister(const uint32_t reg,
const RegisterValue &value)
{
Error error;
uint32_t reg_to_write = reg;
RegisterValue value_to_write = value;
// Check if this is a subregister of a full register.
const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM))
{
RegisterValue full_value;
uint32_t full_reg = reg_info->invalidate_regs[0];
const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
// Read the full register.
error = ReadRegister(full_reg_info, full_value);
if (error.Fail ())
return error;
lldb::ByteOrder byte_order = GetByteOrder();
uint8_t dst[RegisterValue::kMaxRegisterByteSize];
// Get the bytes for the full register.
const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info,
dst,
sizeof(dst),
byte_order,
error);
if (error.Success() && dest_size)
{
uint8_t src[RegisterValue::kMaxRegisterByteSize];
// Get the bytes for the source data.
const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error);
if (error.Success() && src_size && (src_size < dest_size))
{
// Copy the src bytes to the destination.
memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size);
// Set this full register as the value to write.
value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
value_to_write.SetType(full_reg_info);
reg_to_write = full_reg;
}
}
}
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
{
error.SetErrorString ("NativeProcessProtocol is NULL");
return error;
}
const RegisterInfo *const register_to_write_info_p = GetRegisterInfoAtIndex (reg_to_write);
assert (register_to_write_info_p && "register to write does not have valid RegisterInfo");
if (!register_to_write_info_p)
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s failed to get RegisterInfo for write register index %" PRIu32, __FUNCTION__, reg_to_write);
return error;
}
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
return process_p->WriteRegisterValue(m_thread.GetID(),
register_to_write_info_p->byte_offset,
register_to_write_info_p->name,
value_to_write);
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::WriteRegister (const RegisterInfo *reg_info, const RegisterValue &reg_value)
{
assert (reg_info && "reg_info is null");
const uint32_t reg_index = reg_info->kinds[lldb::eRegisterKindLLDB];
if (reg_index == LLDB_INVALID_REGNUM)
return Error ("no lldb regnum for %s", reg_info && reg_info->name ? reg_info->name : "<unknown register>");
if (IsGPR(reg_index))
return WriteRegister(reg_index, reg_value);
if (IsFPR(reg_index, GetFPRType()))
{
if (reg_info->encoding == lldb::eEncodingVector)
{
if (reg_index >= m_reg_info.first_st && reg_index <= m_reg_info.last_st)
::memcpy (m_fpr.xstate.fxsave.stmm[reg_index - m_reg_info.first_st].bytes, reg_value.GetBytes(), reg_value.GetByteSize());
if (reg_index >= m_reg_info.first_mm && reg_index <= m_reg_info.last_mm)
::memcpy (m_fpr.xstate.fxsave.stmm[reg_index - m_reg_info.first_mm].bytes, reg_value.GetBytes(), reg_value.GetByteSize());
if (reg_index >= m_reg_info.first_xmm && reg_index <= m_reg_info.last_xmm)
::memcpy (m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_xmm].bytes, reg_value.GetBytes(), reg_value.GetByteSize());
if (reg_index >= m_reg_info.first_ymm && reg_index <= m_reg_info.last_ymm)
{
if (GetFPRType() != eFPRTypeXSAVE)
return Error ("target processor does not support AVX");
// Store ymm register content, and split into the register halves in xmm.bytes and ymmh.bytes
::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes, reg_value.GetBytes(), reg_value.GetByteSize());
if (!CopyYMMtoXSTATE(reg_index, GetByteOrder()))
return Error ("CopyYMMtoXSTATE() failed");
}
}
else
{
// Get pointer to m_fpr.xstate.fxsave variable and set the data to it.
assert (reg_info->byte_offset < sizeof(m_fpr));
uint8_t *dst = (uint8_t *)&m_fpr + reg_info->byte_offset;
switch (reg_info->byte_size)
{
case 2:
*(uint16_t *)dst = reg_value.GetAsUInt16();
break;
case 4:
*(uint32_t *)dst = reg_value.GetAsUInt32();
break;
case 8:
*(uint64_t *)dst = reg_value.GetAsUInt64();
break;
default:
assert(false && "Unhandled data size.");
return Error ("unhandled register data size %" PRIu32, reg_info->byte_size);
}
}
if (WriteFPR())
{
if (IsAVX(reg_index))
{
if (!CopyYMMtoXSTATE(reg_index, GetByteOrder()))
return Error ("CopyYMMtoXSTATE() failed");
}
return Error ();
}
}
return Error ("failed - register wasn't recognized to be a GPR or an FPR, write strategy unknown");
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::ReadAllRegisterValues (lldb::DataBufferSP &data_sp)
{
Error error;
data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0));
if (!data_sp)
{
error.SetErrorStringWithFormat ("failed to allocate DataBufferHeap instance of size %" PRIu64, REG_CONTEXT_SIZE);
return error;
}
if (!ReadGPR ())
{
error.SetErrorString ("ReadGPR() failed");
return error;
}
if (!ReadFPR ())
{
error.SetErrorString ("ReadFPR() failed");
return error;
}
uint8_t *dst = data_sp->GetBytes ();
if (dst == nullptr)
{
error.SetErrorStringWithFormat ("DataBufferHeap instance of size %" PRIu64 " returned a null pointer", REG_CONTEXT_SIZE);
return error;
}
::memcpy (dst, &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ());
dst += GetRegisterInfoInterface ().GetGPRSize ();
if (GetFPRType () == eFPRTypeFXSAVE)
::memcpy (dst, &m_fpr.xstate.fxsave, sizeof(m_fpr.xstate.fxsave));
else if (GetFPRType () == eFPRTypeXSAVE)
{
lldb::ByteOrder byte_order = GetByteOrder ();
// Assemble the YMM register content from the register halves.
for (uint32_t reg = m_reg_info.first_ymm; reg <= m_reg_info.last_ymm; ++reg)
{
if (!CopyXSTATEtoYMM (reg, byte_order))
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s CopyXSTATEtoYMM() failed for reg num %" PRIu32, __FUNCTION__, reg);
return error;
}
}
// Copy the extended register state including the assembled ymm registers.
::memcpy (dst, &m_fpr, sizeof (m_fpr));
}
else
{
assert (false && "how do we save the floating point registers?");
error.SetErrorString ("unsure how to save the floating point registers");
}
return error;
}
lldb_private::Error
NativeRegisterContextLinux_x86_64::WriteAllRegisterValues (const lldb::DataBufferSP &data_sp)
{
Error error;
if (!data_sp)
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s invalid data_sp provided", __FUNCTION__);
return error;
}
if (data_sp->GetByteSize () != REG_CONTEXT_SIZE)
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s data_sp contained mismatched data size, expected %" PRIu64 ", actual %" PRIu64, __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize ());
return error;
}
uint8_t *src = data_sp->GetBytes ();
if (src == nullptr)
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s DataBuffer::GetBytes() returned a null pointer", __FUNCTION__);
return error;
}
::memcpy (&m_gpr_x86_64, src, GetRegisterInfoInterface ().GetGPRSize ());
if (!WriteGPR ())
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s WriteGPR() failed", __FUNCTION__);
return error;
}
src += GetRegisterInfoInterface ().GetGPRSize ();
if (GetFPRType () == eFPRTypeFXSAVE)
::memcpy (&m_fpr.xstate.fxsave, src, sizeof(m_fpr.xstate.fxsave));
else if (GetFPRType () == eFPRTypeXSAVE)
::memcpy (&m_fpr.xstate.xsave, src, sizeof(m_fpr.xstate.xsave));
if (!WriteFPR ())
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s WriteFPR() failed", __FUNCTION__);
return error;
}
if (GetFPRType() == eFPRTypeXSAVE)
{
lldb::ByteOrder byte_order = GetByteOrder();
// Parse the YMM register content from the register halves.
for (uint32_t reg = m_reg_info.first_ymm; reg <= m_reg_info.last_ymm; ++reg)
{
if (!CopyYMMtoXSTATE (reg, byte_order))
{
error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s CopyYMMtoXSTATE() failed for reg num %" PRIu32, __FUNCTION__, reg);
return error;
}
}
}
return error;
}
bool
NativeRegisterContextLinux_x86_64::IsRegisterSetAvailable (uint32_t set_index) const
{
// Note: Extended register sets are assumed to be at the end of g_reg_sets.
uint32_t num_sets = k_num_register_sets - k_num_extended_register_sets;
if (GetFPRType () == eFPRTypeXSAVE)
{
// AVX is the first extended register set.
++num_sets;
}
return (set_index < num_sets);
}
lldb::ByteOrder
NativeRegisterContextLinux_x86_64::GetByteOrder() const
{
// Get the target process whose privileged thread was used for the register read.
lldb::ByteOrder byte_order = lldb::eByteOrderInvalid;
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
return byte_order;
if (!process_sp->GetByteOrder (byte_order))
{
// FIXME log here
}
return byte_order;
}
bool
NativeRegisterContextLinux_x86_64::IsGPR(uint32_t reg_index) const
{
// GPRs come first.
return reg_index <= m_reg_info.last_gpr;
}
NativeRegisterContextLinux_x86_64::FPRType
NativeRegisterContextLinux_x86_64::GetFPRType () const
{
if (m_fpr_type == eFPRTypeNotValid)
{
// TODO: Use assembly to call cpuid on the inferior and query ebx or ecx.
// Try and see if AVX register retrieval works.
m_fpr_type = eFPRTypeXSAVE;
if (!const_cast<NativeRegisterContextLinux_x86_64*> (this)->ReadFPR ())
{
// Fall back to general floating point with no AVX support.
m_fpr_type = eFPRTypeFXSAVE;
}
}
return m_fpr_type;
}
bool
NativeRegisterContextLinux_x86_64::IsFPR(uint32_t reg_index) const
{
return (m_reg_info.first_fpr <= reg_index && reg_index <= m_reg_info.last_fpr);
}
bool
NativeRegisterContextLinux_x86_64::IsFPR(uint32_t reg_index, FPRType fpr_type) const
{
bool generic_fpr = IsFPR(reg_index);
if (fpr_type == eFPRTypeXSAVE)
return generic_fpr || IsAVX(reg_index);
return generic_fpr;
}
bool
NativeRegisterContextLinux_x86_64::WriteFPR()
{
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
return false;
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
if (GetFPRType() == eFPRTypeFXSAVE)
return process_p->WriteFPR (m_thread.GetID (), &m_fpr.xstate.fxsave, sizeof (m_fpr.xstate.fxsave)).Success();
if (GetFPRType() == eFPRTypeXSAVE)
return process_p->WriteRegisterSet (m_thread.GetID (), &m_iovec, sizeof (m_fpr.xstate.xsave), NT_X86_XSTATE).Success();
return false;
}
bool
NativeRegisterContextLinux_x86_64::IsAVX(uint32_t reg_index) const
{
return (m_reg_info.first_ymm <= reg_index && reg_index <= m_reg_info.last_ymm);
}
bool
NativeRegisterContextLinux_x86_64::CopyXSTATEtoYMM (uint32_t reg_index, lldb::ByteOrder byte_order)
{
if (!IsAVX (reg_index))
return false;
if (byte_order == lldb::eByteOrderLittle)
{
::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes,
m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_ymm].bytes,
sizeof (XMMReg));
::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes + sizeof (XMMReg),
m_fpr.xstate.xsave.ymmh[reg_index - m_reg_info.first_ymm].bytes,
sizeof (YMMHReg));
return true;
}
if (byte_order == lldb::eByteOrderBig)
{
::memcpy(m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes + sizeof (XMMReg),
m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_ymm].bytes,
sizeof (XMMReg));
::memcpy(m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes,
m_fpr.xstate.xsave.ymmh[reg_index - m_reg_info.first_ymm].bytes,
sizeof (YMMHReg));
return true;
}
return false; // unsupported or invalid byte order
}
bool
NativeRegisterContextLinux_x86_64::CopyYMMtoXSTATE(uint32_t reg, lldb::ByteOrder byte_order)
{
if (!IsAVX(reg))
return false;
if (byte_order == lldb::eByteOrderLittle)
{
::memcpy(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes,
sizeof(XMMReg));
::memcpy(m_fpr.xstate.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
sizeof(YMMHReg));
return true;
}
if (byte_order == lldb::eByteOrderBig)
{
::memcpy(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
sizeof(XMMReg));
::memcpy(m_fpr.xstate.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes,
sizeof(YMMHReg));
return true;
}
return false; // unsupported or invalid byte order
}
bool
NativeRegisterContextLinux_x86_64::ReadFPR ()
{
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
return false;
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
const FPRType fpr_type = GetFPRType ();
switch (fpr_type)
{
case FPRType::eFPRTypeFXSAVE:
return process_p->ReadFPR (m_thread.GetID (), &m_fpr.xstate.fxsave, sizeof (m_fpr.xstate.fxsave)).Success();
case FPRType::eFPRTypeXSAVE:
return process_p->ReadRegisterSet (m_thread.GetID (), &m_iovec, sizeof (m_fpr.xstate.xsave), NT_X86_XSTATE).Success();
default:
return false;
}
}
bool
NativeRegisterContextLinux_x86_64::ReadGPR()
{
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
return false;
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
return process_p->ReadGPR (m_thread.GetID (), &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ()).Success();
}
bool
NativeRegisterContextLinux_x86_64::WriteGPR()
{
NativeProcessProtocolSP process_sp (m_thread.GetProcess ());
if (!process_sp)
return false;
NativeProcessLinux *const process_p = reinterpret_cast<NativeProcessLinux*> (process_sp.get ());
return process_p->WriteGPR (m_thread.GetID (), &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ()).Success();
}
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