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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Florian Bernd, Joel Hoener
* 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.
***************************************************************************************************/
/**
* @file
* Provides formatter functions that are shared between the different formatters.
*/
#ifndef ZYDIS_FORMATTER_BASE_H
#define ZYDIS_FORMATTER_BASE_H
#include "zydis/Zydis/Formatter.h"
#include "zydis/Zydis/Internal/String.h"
#ifdef __cplusplus
extern "C" {
#endif
/* ============================================================================================== */
/* Macros */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* String */
/* ---------------------------------------------------------------------------------------------- */
/**
* Appends an unsigned numeric value to the given string.
*
* @param formatter A pointer to the `ZydisFormatter` instance.
* @param base The numeric base.
* @param str The destination string.
* @param value The value to append.
* @param padding_length The padding length.
* @param force_leading_number Enable this option to prepend a leading `0` if the first
* character is non-numeric.
*/
#define ZYDIS_STRING_APPEND_NUM_U(formatter, base, str, value, padding_length, \
force_leading_number) \
switch (base) \
{ \
case ZYDIS_NUMERIC_BASE_DEC: \
ZYAN_CHECK(ZydisStringAppendDecU(str, value, padding_length, \
(formatter)->number_format[base][0].string, \
(formatter)->number_format[base][1].string)); \
break; \
case ZYDIS_NUMERIC_BASE_HEX: \
ZYAN_CHECK(ZydisStringAppendHexU(str, value, padding_length, force_leading_number, \
(formatter)->hex_uppercase, \
(formatter)->number_format[base][0].string, \
(formatter)->number_format[base][1].string)); \
break; \
default: \
return ZYAN_STATUS_INVALID_ARGUMENT; \
}
/**
* Appends a signed numeric value to the given string.
*
* @param formatter A pointer to the `ZydisFormatter` instance.
* @param base The numeric base.
* @param str The destination string.
* @param value The value to append.
* @param padding_length The padding length.
* @param force_leading_number Enable this option to prepend a leading `0`, if the first
* character is non-numeric.
* @param force_sign Enable to print the '+' sign for positive numbers.
*/
#define ZYDIS_STRING_APPEND_NUM_S(formatter, base, str, value, padding_length, \
force_leading_number, force_sign) \
switch (base) \
{ \
case ZYDIS_NUMERIC_BASE_DEC: \
ZYAN_CHECK(ZydisStringAppendDecS(str, value, padding_length, force_sign, \
(formatter)->number_format[base][0].string, \
(formatter)->number_format[base][1].string)); \
break; \
case ZYDIS_NUMERIC_BASE_HEX: \
ZYAN_CHECK(ZydisStringAppendHexS(str, value, padding_length, force_leading_number, \
(formatter)->hex_uppercase, force_sign, \
(formatter)->number_format[base][0].string, \
(formatter)->number_format[base][1].string)); \
break; \
default: \
return ZYAN_STATUS_INVALID_ARGUMENT; \
}
/* ---------------------------------------------------------------------------------------------- */
/* Buffer */
/* ---------------------------------------------------------------------------------------------- */
/**
* Invokes the `ZydisFormatterBufferAppend` routine, if tokenization is enabled for the
* current pass.
*
* @param buffer A pointer to the `ZydisFormatterBuffer` struct.
* @param type The token type.
*
* Using this macro instead of direct calls to `ZydisFormatterBufferAppend` greatly improves the
* performance for non-tokenizing passes.
*/
#define ZYDIS_BUFFER_APPEND_TOKEN(buffer, type) \
if ((buffer)->is_token_list) \
{ \
ZYAN_CHECK(ZydisFormatterBufferAppend(buffer, type)); \
}
/**
* Returns a snapshot of the buffer-state.
*
* @param buffer A pointer to the `ZydisFormatterBuffer` struct.
* @param state Receives a snapshot of the buffer-state.
*
* Using this macro instead of direct calls to `ZydisFormatterBufferRemember` improves the
* performance for non-tokenizing passes.
*/
#define ZYDIS_BUFFER_REMEMBER(buffer, state) \
if ((buffer)->is_token_list) \
{ \
(state) = (ZyanUPointer)(buffer)->string.vector.data; \
} else \
{ \
(state) = (ZyanUPointer)(buffer)->string.vector.size; \
}
/**
* Appends a string (`STR_`-prefix) or a predefined token-list (`TOK_`-prefix).
*
* @param buffer A pointer to the `ZydisFormatterBuffer` struct.
* @param name The base name (without prefix) of the string- or token.
*/
#define ZYDIS_BUFFER_APPEND(buffer, name) \
if ((buffer)->is_token_list) \
{ \
ZYAN_CHECK(ZydisFormatterBufferAppendPredefined(buffer, TOK_ ## name)); \
} else \
{ \
ZYAN_CHECK(ZydisStringAppendShort(&buffer->string, &STR_ ## name)); \
}
// TODO: Implement `letter_case` for predefined tokens
/**
* Appends a string (`STR_`-prefix) or a predefined token-list (`TOK_`-prefix).
*
* @param buffer A pointer to the `ZydisFormatterBuffer` struct.
* @param name The base name (without prefix) of the string- or token.
* @param letter_case The desired letter-case.
*/
#define ZYDIS_BUFFER_APPEND_CASE(buffer, name, letter_case) \
if ((buffer)->is_token_list) \
{ \
ZYAN_CHECK(ZydisFormatterBufferAppendPredefined(buffer, TOK_ ## name)); \
} else \
{ \
ZYAN_CHECK(ZydisStringAppendShortCase(&buffer->string, &STR_ ## name, letter_case)); \
}
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
/* Helper functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Buffer */
/* ---------------------------------------------------------------------------------------------- */
// MSVC does not like the C99 flexible-array extension
#ifdef ZYAN_MSVC
# pragma warning(push)
# pragma warning(disable:4200)
#endif
#pragma pack(push, 1)
typedef struct ZydisPredefinedToken_
{
ZyanU8 size;
ZyanU8 next;
ZyanU8 data[];
} ZydisPredefinedToken;
#pragma pack(pop)
#ifdef ZYAN_MSVC
# pragma warning(pop)
#endif
/**
* Appends a predefined token-list to the `buffer`.
*
* @param buffer A pointer to the `ZydisFormatterBuffer` struct.
* @param data A pointer to the `ZydisPredefinedToken` struct.
*
* @return A zycore status code.
*
* This function is internally used to improve performance while adding static strings or multiple
* tokens at once.
*/
ZYAN_INLINE ZyanStatus ZydisFormatterBufferAppendPredefined(ZydisFormatterBuffer* buffer,
const ZydisPredefinedToken* data)
{
ZYAN_ASSERT(buffer);
ZYAN_ASSERT(data);
const ZyanUSize len = buffer->string.vector.size;
ZYAN_ASSERT((len > 0) && (len < 256));
if (buffer->capacity <= len + data->size)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
ZydisFormatterToken* const last = (ZydisFormatterToken*)buffer->string.vector.data - 1;
last->next = (ZyanU8)len;
ZYAN_MEMCPY((ZyanU8*)buffer->string.vector.data + len, &data->data[0], data->size);
const ZyanUSize delta = len + data->next;
buffer->capacity -= delta;
buffer->string.vector.data = (ZyanU8*)buffer->string.vector.data + delta;
buffer->string.vector.size = data->size - data->next;
buffer->string.vector.capacity = ZYAN_MIN(buffer->capacity, 255);
return ZYAN_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------------------------- */
/* General */
/* ---------------------------------------------------------------------------------------------- */
/**
* Returns the size to be used as explicit size suffix (`AT&T`) or explicit typecast
* (`INTEL`), if required.
*
* @param formatter A pointer to the `ZydisFormatter` instance.
* @param context A pointer to the `ZydisFormatterContext` struct.
* @param operand The instructions first memory operand.
*
* @return Returns the explicit size, if required, or `0`, if not needed.
*
* This function always returns a size different to `0`, if the `ZYDIS_FORMATTER_PROP_FORCE_SIZE`
* is set to `ZYAN_TRUE`.
*/
ZyanU32 ZydisFormatterHelperGetExplicitSize(const ZydisFormatter* formatter,
ZydisFormatterContext* context, const ZydisDecodedOperand* operand);
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
/* Formatter functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Operands */
/* ---------------------------------------------------------------------------------------------- */
ZyanStatus ZydisFormatterBaseFormatOperandREG(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBaseFormatOperandPTR(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBaseFormatOperandIMM(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
/* ---------------------------------------------------------------------------------------------- */
/* Elemental tokens */
/* ---------------------------------------------------------------------------------------------- */
ZyanStatus ZydisFormatterBasePrintAddressABS(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBasePrintAddressREL(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBasePrintIMM(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
/* ---------------------------------------------------------------------------------------------- */
/* Optional tokens */
/* ---------------------------------------------------------------------------------------------- */
ZyanStatus ZydisFormatterBasePrintSegment(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBasePrintPrefixes(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context);
ZyanStatus ZydisFormatterBasePrintDecorator(const ZydisFormatter* formatter,
ZydisFormatterBuffer* buffer, ZydisFormatterContext* context, ZydisDecorator decorator);
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif // ZYDIS_FORMATTER_BASE_H