422 lines
16 KiB
C
422 lines
16 KiB
C
/***************************************************************************************************
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Zyan Disassembler Library (Zydis)
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Original Author : Florian Bernd, Joel Hoener
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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***************************************************************************************************/
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#include <Zydis/Internal/FormatterATT.h>
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/* ============================================================================================== */
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/* Constants */
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/* ============================================================================================== */
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#include <Generated/FormatterStrings.inc>
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/* ============================================================================================== */
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/* Formatter functions */
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/* ============================================================================================== */
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/* ---------------------------------------------------------------------------------------------- */
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/* Instruction */
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/* ---------------------------------------------------------------------------------------------- */
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ZyanStatus ZydisFormatterATTFormatInstruction(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYAN_ASSERT(context->instruction);
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ZYAN_ASSERT(context->operands);
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ZYAN_CHECK(formatter->func_print_prefixes(formatter, buffer, context));
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ZYAN_CHECK(formatter->func_print_mnemonic(formatter, buffer, context));
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ZyanUPointer state_mnemonic;
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ZYDIS_BUFFER_REMEMBER(buffer, state_mnemonic);
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const ZyanI8 c = (ZyanI8)context->instruction->operand_count_visible - 1;
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for (ZyanI8 i = c; i >= 0; --i)
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{
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const ZydisDecodedOperand* const operand = &context->operands[i];
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// Print embedded-mask registers as decorator instead of a regular operand
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if ((i == 1) && (operand->type == ZYDIS_OPERAND_TYPE_REGISTER) &&
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(operand->encoding == ZYDIS_OPERAND_ENCODING_MASK))
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{
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continue;
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}
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ZyanUPointer buffer_state;
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ZYDIS_BUFFER_REMEMBER(buffer, buffer_state);
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if (buffer_state != state_mnemonic)
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{
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ZYDIS_BUFFER_APPEND(buffer, DELIM_OPERAND);
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} else
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{
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ZYDIS_BUFFER_APPEND(buffer, DELIM_MNEMONIC);
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}
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// Set current operand
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context->operand = operand;
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ZyanStatus status;
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if (formatter->func_pre_operand)
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{
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status = formatter->func_pre_operand(formatter, buffer, context);
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if (status == ZYDIS_STATUS_SKIP_TOKEN)
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{
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ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
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continue;
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}
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if (!ZYAN_SUCCESS(status))
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{
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return status;
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}
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}
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switch (operand->type)
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{
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case ZYDIS_OPERAND_TYPE_REGISTER:
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status = formatter->func_format_operand_reg(formatter, buffer, context);
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break;
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case ZYDIS_OPERAND_TYPE_MEMORY:
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status = formatter->func_format_operand_mem(formatter, buffer, context);
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break;
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case ZYDIS_OPERAND_TYPE_POINTER:
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status = formatter->func_format_operand_ptr(formatter, buffer, context);
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break;
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case ZYDIS_OPERAND_TYPE_IMMEDIATE:
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status = formatter->func_format_operand_imm(formatter, buffer, context);
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break;
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default:
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return ZYAN_STATUS_INVALID_ARGUMENT;
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}
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if (status == ZYDIS_STATUS_SKIP_TOKEN)
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{
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ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
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continue;
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}
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if (!ZYAN_SUCCESS(status))
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{
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return status;
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}
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if (formatter->func_post_operand)
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{
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status = formatter->func_post_operand(formatter, buffer, context);
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if (status == ZYDIS_STATUS_SKIP_TOKEN)
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{
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ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
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continue;
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}
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if (ZYAN_SUCCESS(status))
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{
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return status;
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}
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}
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#if !defined(ZYDIS_DISABLE_AVX512) || !defined(ZYDIS_DISABLE_KNC)
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if ((context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX) ||
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(context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX))
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{
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if ((i == 0) &&
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(context->instruction->operand_count_visible > 1) &&
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(context->operands[1].encoding == ZYDIS_OPERAND_ENCODING_MASK))
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{
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_MASK));
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}
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if (operand->type == ZYDIS_OPERAND_TYPE_MEMORY)
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{
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_BC));
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if (context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX)
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{
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_CONVERSION));
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_EH));
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}
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} else
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{
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ZyanBool decorate_operand;
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if (i == (context->instruction->operand_count_visible - 1))
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{
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decorate_operand = operand->type != ZYDIS_OPERAND_TYPE_IMMEDIATE;
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}
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else
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{
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decorate_operand =
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(context->instruction->operand_count_visible > (i + 1)) &&
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((context->operands[i + 1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE) ||
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(context->operands[i + 1].visibility == ZYDIS_OPERAND_VISIBILITY_HIDDEN));
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}
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if (decorate_operand)
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{
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if (context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX)
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{
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_SWIZZLE));
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}
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_RC));
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ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
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ZYDIS_DECORATOR_SAE));
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}
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}
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}
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#endif
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}
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return ZYAN_STATUS_SUCCESS;
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}
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/* ---------------------------------------------------------------------------------------------- */
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/* Operands */
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/* ---------------------------------------------------------------------------------------------- */
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ZyanStatus ZydisFormatterATTFormatOperandMEM(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYAN_CHECK(formatter->func_print_segment(formatter, buffer, context));
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const ZyanBool absolute = !formatter->force_relative_riprel &&
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(context->runtime_address != ZYDIS_RUNTIME_ADDRESS_NONE);
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if (absolute && context->operand->mem.disp.has_displacement &&
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(context->operand->mem.index == ZYDIS_REGISTER_NONE) &&
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((context->operand->mem.base == ZYDIS_REGISTER_NONE) ||
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(context->operand->mem.base == ZYDIS_REGISTER_EIP ) ||
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(context->operand->mem.base == ZYDIS_REGISTER_RIP )))
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{
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// EIP/RIP-relative or absolute-displacement address operand
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ZYAN_CHECK(formatter->func_print_address_abs(formatter, buffer, context));
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} else
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{
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const ZyanBool should_print_reg = context->operand->mem.base != ZYDIS_REGISTER_NONE;
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const ZyanBool should_print_idx = context->operand->mem.index != ZYDIS_REGISTER_NONE;
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const ZyanBool neither_reg_nor_idx = !should_print_reg && !should_print_idx;
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// Regular memory operand
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if (neither_reg_nor_idx)
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{
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ZYAN_CHECK(formatter->func_print_address_abs(formatter, buffer, context));
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} else if (context->operand->mem.disp.has_displacement && context->operand->mem.disp.value)
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{
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ZYAN_CHECK(formatter->func_print_disp(formatter, buffer, context));
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}
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if (neither_reg_nor_idx)
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{
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return ZYAN_STATUS_SUCCESS;
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}
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ZYDIS_BUFFER_APPEND(buffer, MEMORY_BEGIN_ATT);
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if (should_print_reg)
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{
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ZYAN_CHECK(formatter->func_print_register(formatter, buffer, context,
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context->operand->mem.base));
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}
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if (should_print_idx)
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{
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ZYDIS_BUFFER_APPEND(buffer, DELIM_MEMORY);
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ZYAN_CHECK(formatter->func_print_register(formatter, buffer, context,
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context->operand->mem.index));
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if (context->operand->mem.scale &&
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(context->operand->mem.type != ZYDIS_MEMOP_TYPE_MIB) &&
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((context->operand->mem.scale > 1) || formatter->force_memory_scale))
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{
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ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_DELIMITER);
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ZYDIS_BUFFER_APPEND(buffer, DELIM_MEMORY);
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ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_IMMEDIATE);
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ZYAN_CHECK(ZydisStringAppendDecU(&buffer->string, context->operand->mem.scale, 0,
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ZYAN_NULL, ZYAN_NULL));
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}
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}
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ZYDIS_BUFFER_APPEND(buffer, MEMORY_END_ATT);
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return ZYAN_STATUS_SUCCESS;
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}
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return ZYAN_STATUS_SUCCESS;
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}
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/* ---------------------------------------------------------------------------------------------- */
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/* Elemental tokens */
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/* ---------------------------------------------------------------------------------------------- */
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ZyanStatus ZydisFormatterATTPrintMnemonic(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYAN_ASSERT(context->instruction);
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ZYAN_ASSERT(context->operands);
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const ZydisShortString* mnemonic = ZydisMnemonicGetStringWrapped(
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context->instruction->mnemonic);
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if (!mnemonic)
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{
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ZYDIS_BUFFER_APPEND_CASE(buffer, INVALID_MNEMONIC, formatter->case_mnemonic);
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return ZYAN_STATUS_SUCCESS;
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}
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ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_MNEMONIC);
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if (context->instruction->meta.branch_type == ZYDIS_BRANCH_TYPE_FAR)
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{
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ZYAN_CHECK(ZydisStringAppendShortCase(&buffer->string, &STR_FAR_ATT,
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formatter->case_mnemonic));
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}
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ZYAN_CHECK(ZydisStringAppendShortCase(&buffer->string, mnemonic, formatter->case_mnemonic));
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// Append operand-size suffix
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ZyanU32 size = 0;
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for (ZyanU8 i = 0; i < context->instruction->operand_count_visible; ++i)
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{
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const ZydisDecodedOperand* const operand = &context->operands[i];
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if ((operand->type == ZYDIS_OPERAND_TYPE_MEMORY) &&
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((operand->mem.type == ZYDIS_MEMOP_TYPE_MEM) ||
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(operand->mem.type == ZYDIS_MEMOP_TYPE_VSIB)))
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{
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size = ZydisFormatterHelperGetExplicitSize(formatter, context, operand);
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break;
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}
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}
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switch (size)
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{
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case 8: ZydisStringAppendShort(&buffer->string, &STR_SIZE_8_ATT ); break;
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case 16: ZydisStringAppendShort(&buffer->string, &STR_SIZE_16_ATT ); break;
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case 32: ZydisStringAppendShort(&buffer->string, &STR_SIZE_32_ATT ); break;
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case 64: ZydisStringAppendShort(&buffer->string, &STR_SIZE_64_ATT ); break;
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case 128: ZydisStringAppendShort(&buffer->string, &STR_SIZE_128_ATT); break;
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case 256: ZydisStringAppendShort(&buffer->string, &STR_SIZE_256_ATT); break;
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case 512: ZydisStringAppendShort(&buffer->string, &STR_SIZE_512_ATT); break;
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default:
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break;
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}
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if (formatter->print_branch_size)
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{
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switch (context->instruction->meta.branch_type)
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{
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case ZYDIS_BRANCH_TYPE_NONE:
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break;
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case ZYDIS_BRANCH_TYPE_SHORT:
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return ZydisStringAppendShortCase(&buffer->string, &STR_SHORT,
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formatter->case_mnemonic);
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case ZYDIS_BRANCH_TYPE_NEAR:
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return ZydisStringAppendShortCase(&buffer->string, &STR_NEAR,
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formatter->case_mnemonic);
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default:
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return ZYAN_STATUS_INVALID_ARGUMENT;
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}
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}
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return ZYAN_STATUS_SUCCESS;
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}
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ZyanStatus ZydisFormatterATTPrintRegister(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context, ZydisRegister reg)
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{
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ZYAN_UNUSED(context);
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYDIS_BUFFER_APPEND(buffer, REGISTER);
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const ZydisShortString* str = ZydisRegisterGetStringWrapped(reg);
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if (!str)
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{
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return ZydisStringAppendShortCase(&buffer->string, &STR_INVALID_REG,
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formatter->case_registers);
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}
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return ZydisStringAppendShortCase(&buffer->string, str, formatter->case_registers);
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}
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ZyanStatus ZydisFormatterATTPrintAddressABS(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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if ((context->instruction->meta.branch_type != ZYDIS_BRANCH_TYPE_NONE) &&
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(context->operand->type == ZYDIS_OPERAND_TYPE_MEMORY))
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{
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ZYDIS_BUFFER_APPEND(buffer, MUL);
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}
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return ZydisFormatterBasePrintAddressABS(formatter, buffer, context);
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}
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ZyanStatus ZydisFormatterATTPrintDISP(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_DISPLACEMENT);
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switch (formatter->disp_signedness)
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{
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case ZYDIS_SIGNEDNESS_AUTO:
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case ZYDIS_SIGNEDNESS_SIGNED:
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ZYDIS_STRING_APPEND_NUM_S(formatter, formatter->disp_base, &buffer->string,
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context->operand->mem.disp.value, formatter->disp_padding,
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formatter->hex_force_leading_number, ZYAN_FALSE);
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break;
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case ZYDIS_SIGNEDNESS_UNSIGNED:
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ZYDIS_STRING_APPEND_NUM_U(formatter, formatter->disp_base, &buffer->string,
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context->operand->mem.disp.value, formatter->disp_padding,
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formatter->hex_force_leading_number);
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break;
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default:
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return ZYAN_STATUS_INVALID_ARGUMENT;
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}
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return ZYAN_STATUS_SUCCESS;
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}
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ZyanStatus ZydisFormatterATTPrintIMM(const ZydisFormatter* formatter,
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ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
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{
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ZYAN_ASSERT(formatter);
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ZYAN_ASSERT(buffer);
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ZYAN_ASSERT(context);
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ZYDIS_BUFFER_APPEND(buffer, IMMEDIATE);
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return ZydisFormatterBasePrintIMM(formatter, buffer, context);
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}
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/* ---------------------------------------------------------------------------------------------- */
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/* ============================================================================================== */
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