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-rw-r--r--js/src/zydis/Zydis/FormatterIntel.c455
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diff --git a/js/src/zydis/Zydis/FormatterIntel.c b/js/src/zydis/Zydis/FormatterIntel.c
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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.
+
+***************************************************************************************************/
+
+#include "zydis/Zydis/Internal/FormatterIntel.h"
+#include "zydis/Zydis/Utils.h"
+#include "zydis/Zycore/Format.h"
+
+/* ============================================================================================== */
+/* Constants */
+/* ============================================================================================== */
+
+#include "zydis/Zydis/Generated/FormatterStrings.inc"
+
+/* ============================================================================================== */
+/* Formatter functions */
+/* ============================================================================================== */
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Intel */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZydisFormatterIntelFormatInstruction(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+ ZYAN_ASSERT(context->instruction);
+ ZYAN_ASSERT(context->operands);
+
+ ZYAN_CHECK(formatter->func_print_prefixes(formatter, buffer, context));
+ ZYAN_CHECK(formatter->func_print_mnemonic(formatter, buffer, context));
+
+ ZyanUPointer state_mnemonic;
+ ZYDIS_BUFFER_REMEMBER(buffer, state_mnemonic);
+ for (ZyanU8 i = 0; i < context->instruction->operand_count_visible; ++i)
+ {
+ const ZydisDecodedOperand* const operand = &context->operands[i];
+
+ // Print embedded-mask registers as decorator instead of a regular operand
+ if ((i == 1) && (operand->type == ZYDIS_OPERAND_TYPE_REGISTER) &&
+ (operand->encoding == ZYDIS_OPERAND_ENCODING_MASK))
+ {
+ continue;
+ }
+
+ ZyanUPointer buffer_state;
+ ZYDIS_BUFFER_REMEMBER(buffer, buffer_state);
+
+ if (buffer_state != state_mnemonic)
+ {
+ ZYDIS_BUFFER_APPEND(buffer, DELIM_OPERAND);
+ } else
+ {
+ ZYDIS_BUFFER_APPEND(buffer, DELIM_MNEMONIC);
+ }
+
+ // Set current operand
+ context->operand = operand;
+
+ ZyanStatus status;
+ if (formatter->func_pre_operand)
+ {
+ status = formatter->func_pre_operand(formatter, buffer, context);
+ if (status == ZYDIS_STATUS_SKIP_TOKEN)
+ {
+ ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
+ continue;
+ }
+ if (!ZYAN_SUCCESS(status))
+ {
+ return status;
+ }
+ }
+
+ switch (operand->type)
+ {
+ case ZYDIS_OPERAND_TYPE_REGISTER:
+ status = formatter->func_format_operand_reg(formatter, buffer, context);
+ break;
+ case ZYDIS_OPERAND_TYPE_MEMORY:
+ status = formatter->func_format_operand_mem(formatter, buffer, context);
+ break;
+ case ZYDIS_OPERAND_TYPE_POINTER:
+ status = formatter->func_format_operand_ptr(formatter, buffer, context);
+ break;
+ case ZYDIS_OPERAND_TYPE_IMMEDIATE:
+ status = formatter->func_format_operand_imm(formatter, buffer, context);
+ break;
+ default:
+ return ZYAN_STATUS_INVALID_ARGUMENT;
+ }
+ if (status == ZYDIS_STATUS_SKIP_TOKEN)
+ {
+ ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
+ continue;
+ }
+ if (!ZYAN_SUCCESS(status))
+ {
+ return status;
+ }
+
+ if (formatter->func_post_operand)
+ {
+ status = formatter->func_post_operand(formatter, buffer, context);
+ if (status == ZYDIS_STATUS_SKIP_TOKEN)
+ {
+ ZYAN_CHECK(ZydisFormatterBufferRestore(buffer, buffer_state));
+ continue;
+ }
+ if (ZYAN_SUCCESS(status))
+ {
+ return status;
+ }
+ }
+
+#if !defined(ZYDIS_DISABLE_AVX512) || !defined(ZYDIS_DISABLE_KNC)
+ if ((context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX) ||
+ (context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX))
+ {
+ if ((i == 0) &&
+ (context->instruction->operand_count_visible > 1) &&
+ (context->operands[i + 1].encoding == ZYDIS_OPERAND_ENCODING_MASK))
+ {
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_MASK));
+ }
+ if (operand->type == ZYDIS_OPERAND_TYPE_MEMORY)
+ {
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_BC));
+ if (context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX)
+ {
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_CONVERSION));
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_EH));
+ }
+ } else
+ {
+ ZyanBool decorate_operand;
+ if (i == (context->instruction->operand_count_visible - 1))
+ {
+ decorate_operand = operand->type != ZYDIS_OPERAND_TYPE_IMMEDIATE;
+ }
+ else
+ {
+ decorate_operand =
+ (context->instruction->operand_count_visible > (i + 1)) &&
+ ((context->operands[i + 1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE) ||
+ (context->operands[i + 1].visibility == ZYDIS_OPERAND_VISIBILITY_HIDDEN));
+ }
+ if (decorate_operand)
+ {
+ if (context->instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX)
+ {
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_SWIZZLE));
+ }
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_RC));
+ ZYAN_CHECK(formatter->func_print_decorator(formatter, buffer, context,
+ ZYDIS_DECORATOR_SAE));
+ }
+ }
+ }
+#endif
+ }
+
+ return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterIntelFormatOperandMEM(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ if ((context->operand->mem.type == ZYDIS_MEMOP_TYPE_MEM) ||
+ (context->operand->mem.type == ZYDIS_MEMOP_TYPE_VSIB))
+ {
+ ZYAN_CHECK(formatter->func_print_typecast(formatter, buffer, context));
+ }
+ ZYAN_CHECK(formatter->func_print_segment(formatter, buffer, context));
+
+ ZYDIS_BUFFER_APPEND(buffer, MEMORY_BEGIN_INTEL);
+
+ const ZyanBool absolute = !formatter->force_relative_riprel &&
+ (context->runtime_address != ZYDIS_RUNTIME_ADDRESS_NONE);
+ if (absolute && context->operand->mem.disp.has_displacement &&
+ (context->operand->mem.index == ZYDIS_REGISTER_NONE) &&
+ ((context->operand->mem.base == ZYDIS_REGISTER_NONE) ||
+ (context->operand->mem.base == ZYDIS_REGISTER_EIP ) ||
+ (context->operand->mem.base == ZYDIS_REGISTER_RIP )))
+ {
+ // EIP/RIP-relative or absolute-displacement address operand
+ ZYAN_CHECK(formatter->func_print_address_abs(formatter, buffer, context));
+ } else
+ {
+ const ZyanBool should_print_reg = context->operand->mem.base != ZYDIS_REGISTER_NONE;
+ const ZyanBool should_print_idx = context->operand->mem.index != ZYDIS_REGISTER_NONE;
+ const ZyanBool neither_reg_nor_idx = !should_print_reg && !should_print_idx;
+
+ // Regular memory operand
+ if (should_print_reg)
+ {
+ ZYAN_CHECK(formatter->func_print_register(formatter, buffer, context,
+ context->operand->mem.base));
+ }
+ if (should_print_idx)
+ {
+ if (context->operand->mem.base != ZYDIS_REGISTER_NONE)
+ {
+ ZYDIS_BUFFER_APPEND(buffer, ADD);
+ }
+ ZYAN_CHECK(formatter->func_print_register(formatter, buffer, context,
+ context->operand->mem.index));
+ if (context->operand->mem.scale &&
+ (context->operand->mem.type != ZYDIS_MEMOP_TYPE_MIB) &&
+ ((context->operand->mem.scale > 1) || formatter->force_memory_scale))
+ {
+ ZYDIS_BUFFER_APPEND(buffer, MUL);
+ ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_IMMEDIATE);
+ ZYAN_CHECK(ZydisStringAppendDecU(&buffer->string, context->operand->mem.scale, 0,
+ ZYAN_NULL, ZYAN_NULL));
+ }
+ }
+ if (neither_reg_nor_idx)
+ {
+ ZYAN_CHECK(formatter->func_print_address_abs(formatter, buffer, context));
+ } else if (context->operand->mem.disp.has_displacement && context->operand->mem.disp.value)
+ {
+ ZYAN_CHECK(formatter->func_print_disp(formatter, buffer, context));
+ }
+ }
+
+ ZYDIS_BUFFER_APPEND(buffer, MEMORY_END_INTEL);
+ return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterIntelPrintMnemonic(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ const ZydisShortString* mnemonic = ZydisMnemonicGetStringWrapped(
+ context->instruction->mnemonic);
+ if (!mnemonic)
+ {
+ ZYDIS_BUFFER_APPEND_CASE(buffer, INVALID_MNEMONIC, formatter->case_mnemonic);
+ return ZYAN_STATUS_SUCCESS;
+ }
+
+ ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_MNEMONIC);
+ ZYAN_CHECK(ZydisStringAppendShortCase(&buffer->string, mnemonic, formatter->case_mnemonic));
+ if (context->instruction->meta.branch_type == ZYDIS_BRANCH_TYPE_FAR)
+ {
+ return ZydisStringAppendShortCase(&buffer->string, &STR_FAR, formatter->case_mnemonic);
+ }
+ if (formatter->print_branch_size)
+ {
+ switch (context->instruction->meta.branch_type)
+ {
+ case ZYDIS_BRANCH_TYPE_NONE:
+ break;
+ case ZYDIS_BRANCH_TYPE_SHORT:
+ return ZydisStringAppendShortCase(&buffer->string, &STR_SHORT,
+ formatter->case_mnemonic);
+ case ZYDIS_BRANCH_TYPE_NEAR:
+ return ZydisStringAppendShortCase(&buffer->string, &STR_NEAR,
+ formatter->case_mnemonic);
+ default:
+ return ZYAN_STATUS_INVALID_ARGUMENT;
+ }
+ }
+
+ return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterIntelPrintRegister(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context, ZydisRegister reg)
+{
+ ZYAN_UNUSED(context);
+
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ const ZydisShortString* str = ZydisRegisterGetStringWrapped(reg);
+ if (!str)
+ {
+ ZYDIS_BUFFER_APPEND_CASE(buffer, INVALID_REG, formatter->case_registers);
+ return ZYAN_STATUS_SUCCESS;
+ }
+
+ ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_REGISTER);
+ return ZydisStringAppendShortCase(&buffer->string, str, formatter->case_registers);
+}
+
+ZyanStatus ZydisFormatterIntelPrintDISP(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ switch (formatter->disp_signedness)
+ {
+ case ZYDIS_SIGNEDNESS_AUTO:
+ case ZYDIS_SIGNEDNESS_SIGNED:
+ if (context->operand->mem.disp.value < 0)
+ {
+ if ((context->operand->mem.base != ZYDIS_REGISTER_NONE) ||
+ (context->operand->mem.index != ZYDIS_REGISTER_NONE))
+ {
+ ZYDIS_BUFFER_APPEND(buffer, SUB);
+ }
+ ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_DISPLACEMENT);
+ ZYDIS_STRING_APPEND_NUM_U(formatter, formatter->disp_base, &buffer->string,
+ ZyanAbsI64(context->operand->mem.disp.value), formatter->disp_padding,
+ formatter->hex_force_leading_number);
+ break;
+ }
+ ZYAN_FALLTHROUGH;
+ case ZYDIS_SIGNEDNESS_UNSIGNED:
+ if ((context->operand->mem.base != ZYDIS_REGISTER_NONE) ||
+ (context->operand->mem.index != ZYDIS_REGISTER_NONE))
+ {
+ ZYDIS_BUFFER_APPEND(buffer, ADD);
+ }
+ ZYDIS_BUFFER_APPEND_TOKEN(buffer, ZYDIS_TOKEN_DISPLACEMENT);
+ ZYDIS_STRING_APPEND_NUM_U(formatter, formatter->disp_base, &buffer->string,
+ context->operand->mem.disp.value, formatter->disp_padding,
+ formatter->hex_force_leading_number);
+ break;
+ default:
+ return ZYAN_STATUS_INVALID_ARGUMENT;
+ }
+
+ return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterIntelPrintTypecast(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ switch (ZydisFormatterHelperGetExplicitSize(formatter, context, context->operand))
+ {
+ case 8: ZYDIS_BUFFER_APPEND(buffer, SIZE_8_INTEL ); break;
+ case 16: ZYDIS_BUFFER_APPEND(buffer, SIZE_16_INTEL ); break;
+ case 32: ZYDIS_BUFFER_APPEND(buffer, SIZE_32_INTEL ); break;
+ case 48: ZYDIS_BUFFER_APPEND(buffer, SIZE_48 ); break;
+ case 64: ZYDIS_BUFFER_APPEND(buffer, SIZE_64_INTEL ); break;
+ case 80: ZYDIS_BUFFER_APPEND(buffer, SIZE_80 ); break;
+ case 128: ZYDIS_BUFFER_APPEND(buffer, SIZE_128_INTEL); break;
+ case 256: ZYDIS_BUFFER_APPEND(buffer, SIZE_256_INTEL); break;
+ case 512: ZYDIS_BUFFER_APPEND(buffer, SIZE_512_INTEL); break;
+ default:
+ break;
+ }
+
+ return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+/* MASM */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZydisFormatterIntelFormatInstructionMASM(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ // Force the formatter to always call our MASM `ZYDIS_FORMATTER_PRINT_ADDRESS_ABS` function.
+ // This implicitly omits printing of the `RIP`/`EIP` registers for `RIP`/`EIP`-relative
+ // memory operands
+ context->runtime_address = 0;
+
+ return ZydisFormatterIntelFormatInstruction(formatter, buffer, context);
+}
+
+ZyanStatus ZydisFormatterIntelPrintAddressMASM(const ZydisFormatter* formatter,
+ ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
+{
+ ZYAN_ASSERT(formatter);
+ ZYAN_ASSERT(buffer);
+ ZYAN_ASSERT(context);
+
+ ZyanU64 address;
+ ZYAN_CHECK(ZydisCalcAbsoluteAddress(context->instruction, context->operand, 0, &address));
+
+ ZyanU8 padding = (formatter->addr_padding_relative ==
+ ZYDIS_PADDING_AUTO) ? 0 : (ZyanU8)formatter->addr_padding_relative;
+ if ((formatter->addr_padding_relative == ZYDIS_PADDING_AUTO) &&
+ (formatter->addr_base == ZYDIS_NUMERIC_BASE_HEX))
+ {
+ switch (context->instruction->stack_width)
+ {
+ case 16:
+ padding = 4;
+ address = (ZyanU16)address;
+ break;
+ case 32:
+ padding = 8;
+ address = (ZyanU32)address;
+ break;
+ case 64:
+ padding = 16;
+ break;
+ default:
+ return ZYAN_STATUS_INVALID_ARGUMENT;
+ }
+ }
+
+ ZYDIS_BUFFER_APPEND(buffer, ADDR_RELATIVE);
+ ZYDIS_STRING_APPEND_NUM_S(formatter, formatter->addr_base, &buffer->string, address, padding,
+ formatter->hex_force_leading_number, ZYAN_TRUE);
+
+ return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+
+/* ============================================================================================== */