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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Florian Bernd
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#include "zydis/Zydis/Register.h"
/* ============================================================================================== */
/* Register strings */
/* ============================================================================================== */
#include "zydis/Zydis/Generated/EnumRegister.inc"
/* ============================================================================================== */
/* Register-class mapping */
/* ============================================================================================== */
/**
* Defines the `ZydisRegisterMapItem` struct.
*/
typedef struct ZydisRegisterLookupItem
{
/**
* The register class.
*/
ZydisRegisterClass class;
/**
* The register id.
*/
ZyanI8 id;
/**
* The width of register 16- and 32-bit mode.
*/
ZydisRegisterWidth width;
/**
* The width of register in 64-bit mode.
*/
ZydisRegisterWidth width64;
} ZydisRegisterLookupItem;
#include "zydis/Zydis/Generated/RegisterLookup.inc"
/**
* Defines the `ZydisRegisterClassLookupItem` struct.
*/
typedef struct ZydisRegisterClassLookupItem_
{
/**
* The lowest register of the current class.
*/
ZydisRegister lo;
/**
* The highest register of the current class.
*/
ZydisRegister hi;
/**
* The width of registers of the current class in 16- and 32-bit mode.
*/
ZydisRegisterWidth width;
/**
* The width of registers of the current class in 64-bit mode.
*/
ZydisRegisterWidth width64;
} ZydisRegisterClassLookupItem;
#include "zydis/Zydis/Generated/RegisterClassLookup.inc"
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Register */
/* ---------------------------------------------------------------------------------------------- */
ZydisRegister ZydisRegisterEncode(ZydisRegisterClass register_class, ZyanU8 id)
{
if ((register_class == ZYDIS_REGCLASS_INVALID) ||
(register_class == ZYDIS_REGCLASS_FLAGS) ||
(register_class == ZYDIS_REGCLASS_IP))
{
return ZYDIS_REGISTER_NONE;
}
if ((ZyanUSize)register_class >= ZYAN_ARRAY_LENGTH(REG_CLASS_LOOKUP))
{
return ZYDIS_REGISTER_NONE;
}
const ZydisRegisterClassLookupItem* item = ®_CLASS_LOOKUP[register_class];
if (id <= (item->hi - item->lo))
{
return item->lo + id;
}
return ZYDIS_REGISTER_NONE;
}
ZyanI8 ZydisRegisterGetId(ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(REG_LOOKUP))
{
return -1;
}
return REG_LOOKUP[reg].id;
}
ZydisRegisterClass ZydisRegisterGetClass(ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(REG_LOOKUP))
{
return ZYDIS_REGCLASS_INVALID;
}
return REG_LOOKUP[reg].class;
}
ZydisRegisterWidth ZydisRegisterGetWidth(ZydisMachineMode mode, ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(REG_LOOKUP))
{
return 0;
}
return (mode == ZYDIS_MACHINE_MODE_LONG_64)
? REG_LOOKUP[reg].width64
: REG_LOOKUP[reg].width;
}
ZydisRegister ZydisRegisterGetLargestEnclosing(ZydisMachineMode mode, ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(REG_LOOKUP))
{
return ZYDIS_REGISTER_NONE;
}
static const ZyanU8 GPR8_MAPPING[20] =
{
/* AL */ 0,
/* CL */ 1,
/* DL */ 2,
/* BL */ 3,
/* AH */ 0,
/* CH */ 1,
/* DH */ 2,
/* BH */ 3,
/* SPL */ 4,
/* BPL */ 5,
/* SIL */ 6,
/* DIL */ 7,
/* R8B */ 8,
/* R9B */ 9,
/* R10B */ 10,
/* R11B */ 11,
/* R12B */ 12,
/* R13B */ 13,
/* R14B */ 14,
/* R15B */ 15,
};
const ZydisRegisterClass reg_class = REG_LOOKUP[reg].class;
if ((reg_class == ZYDIS_REGCLASS_INVALID) ||
((reg_class == ZYDIS_REGCLASS_GPR64) && (mode != ZYDIS_MACHINE_MODE_LONG_64)))
{
return ZYDIS_REGISTER_NONE;
}
ZyanU8 reg_id = REG_LOOKUP[reg].id;
switch (reg_class)
{
case ZYDIS_REGCLASS_GPR8:
reg_id = GPR8_MAPPING[reg_id];
ZYAN_FALLTHROUGH;
case ZYDIS_REGCLASS_GPR16:
case ZYDIS_REGCLASS_GPR32:
case ZYDIS_REGCLASS_GPR64:
switch (mode)
{
case ZYDIS_MACHINE_MODE_LONG_64:
return REG_CLASS_LOOKUP[ZYDIS_REGCLASS_GPR64].lo + reg_id;
case ZYDIS_MACHINE_MODE_LONG_COMPAT_32:
case ZYDIS_MACHINE_MODE_LEGACY_32:
return REG_CLASS_LOOKUP[ZYDIS_REGCLASS_GPR32].lo + reg_id;
case ZYDIS_MACHINE_MODE_LONG_COMPAT_16:
case ZYDIS_MACHINE_MODE_LEGACY_16:
case ZYDIS_MACHINE_MODE_REAL_16:
return REG_CLASS_LOOKUP[ZYDIS_REGCLASS_GPR16].lo + reg_id;
default:
return ZYDIS_REGISTER_NONE;
}
case ZYDIS_REGCLASS_XMM:
case ZYDIS_REGCLASS_YMM:
case ZYDIS_REGCLASS_ZMM:
#if defined(ZYDIS_DISABLE_AVX512) && defined(ZYDIS_DISABLE_KNC)
return REG_CLASS_LOOKUP[ZYDIS_REGCLASS_YMM].lo + reg_id;
#else
return REG_CLASS_LOOKUP[ZYDIS_REGCLASS_ZMM].lo + reg_id;
#endif
default:
return ZYDIS_REGISTER_NONE;
}
}
const char* ZydisRegisterGetString(ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(STR_REGISTERS))
{
return ZYAN_NULL;
}
return STR_REGISTERS[reg].data;
}
const ZydisShortString* ZydisRegisterGetStringWrapped(ZydisRegister reg)
{
if ((ZyanUSize)reg >= ZYAN_ARRAY_LENGTH(STR_REGISTERS))
{
return ZYAN_NULL;
}
return &STR_REGISTERS[reg];
}
/* ---------------------------------------------------------------------------------------------- */
/* Register class */
/* ---------------------------------------------------------------------------------------------- */
ZydisRegisterWidth ZydisRegisterClassGetWidth(ZydisMachineMode mode,
ZydisRegisterClass register_class)
{
if ((ZyanUSize)register_class >= ZYAN_ARRAY_LENGTH(REG_CLASS_LOOKUP))
{
return 0;
}
return (mode == ZYDIS_MACHINE_MODE_LONG_64)
? REG_CLASS_LOOKUP[register_class].width64
: REG_CLASS_LOOKUP[register_class].width;
}
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
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