Index: sandbox/win/src/sidestep/mini_disassembler.h |
diff --git a/sandbox/win/src/sidestep/mini_disassembler.h b/sandbox/win/src/sidestep/mini_disassembler.h |
deleted file mode 100644 |
index 202c4ecc2041c2756ca05c9e9c95af7807d4bf91..0000000000000000000000000000000000000000 |
--- a/sandbox/win/src/sidestep/mini_disassembler.h |
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@@ -1,156 +0,0 @@ |
-// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
-// Use of this source code is governed by a BSD-style license that can be |
-// found in the LICENSE file. |
- |
-// Definition of MiniDisassembler. |
- |
-#ifndef SANDBOX_SRC_SIDESTEP_MINI_DISASSEMBLER_H__ |
-#define SANDBOX_SRC_SIDESTEP_MINI_DISASSEMBLER_H__ |
- |
-#include "sandbox/win/src/sidestep/mini_disassembler_types.h" |
- |
-namespace sidestep { |
- |
-// This small disassembler is very limited |
-// in its functionality, and in fact does only the bare minimum required by the |
-// preamble patching utility. It may be useful for other purposes, however. |
-// |
-// The limitations include at least the following: |
-// -# No support for coprocessor opcodes, MMX, etc. |
-// -# No machine-readable identification of opcodes or decoding of |
-// assembly parameters. The name of the opcode (as a string) is given, |
-// however, to aid debugging. |
-// |
-// You may ask what this little disassembler actually does, then? The answer is |
-// that it does the following, which is exactly what the patching utility needs: |
-// -# Indicates if opcode is a jump (any kind) or a return (any kind) |
-// because this is important for the patching utility to determine if |
-// a function is too short or there are jumps too early in it for it |
-// to be preamble patched. |
-// -# The opcode length is always calculated, so that the patching utility |
-// can figure out where the next instruction starts, and whether it |
-// already has enough instructions to replace with the absolute jump |
-// to the patching code. |
-// |
-// The usage is quite simple; just create a MiniDisassembler and use its |
-// Disassemble() method. |
-// |
-// If you would like to extend this disassembler, please refer to the |
-// IA-32 Intel Architecture Software Developer's Manual Volume 2: |
-// Instruction Set Reference for information about operand decoding |
-// etc. |
-class MiniDisassembler { |
- public: |
- |
- // Creates a new instance and sets defaults. |
- // |
- // operand_default_32_bits: If true, the default operand size is |
- // set to 32 bits, which is the default under Win32. Otherwise it is 16 bits. |
- // address_default_32_bits: If true, the default address size is |
- // set to 32 bits, which is the default under Win32. Otherwise it is 16 bits. |
- MiniDisassembler(bool operand_default_32_bits, |
- bool address_default_32_bits); |
- |
- // Equivalent to MiniDisassembler(true, true); |
- MiniDisassembler(); |
- |
- // Attempts to disassemble a single instruction starting from the |
- // address in memory it is pointed to. |
- // |
- // start: Address where disassembly should start. |
- // instruction_bytes: Variable that will be incremented by |
- // the length in bytes of the instruction. |
- // Returns enItJump, enItReturn or enItGeneric on success. enItUnknown |
- // if unable to disassemble, enItUnused if this seems to be an unused |
- // opcode. In the last two (error) cases, cbInstruction will be set |
- // to 0xffffffff. |
- // |
- // Postcondition: This instance of the disassembler is ready to be used again, |
- // with unchanged defaults from creation time. |
- InstructionType Disassemble(unsigned char* start, |
- unsigned int* instruction_bytes); |
- |
- private: |
- |
- // Makes the disassembler ready for reuse. |
- void Initialize(); |
- |
- // Sets the flags for address and operand sizes. |
- // Returns Number of prefix bytes. |
- InstructionType ProcessPrefixes(unsigned char* start, unsigned int* size); |
- |
- // Sets the flag for whether we have ModR/M, and increments |
- // operand_bytes_ if any are specifies by the opcode directly. |
- // Returns Number of opcode bytes. |
- InstructionType ProcessOpcode(unsigned char* start, |
- unsigned int table, |
- unsigned int* size); |
- |
- // Checks the type of the supplied operand. Increments |
- // operand_bytes_ if it directly indicates an immediate etc. |
- // operand. Asserts have_modrm_ if the operand specifies |
- // a ModR/M byte. |
- bool ProcessOperand(int flag_operand); |
- |
- // Increments operand_bytes_ by size specified by ModR/M and |
- // by SIB if present. |
- // Returns 0 in case of error, 1 if there is just a ModR/M byte, |
- // 2 if there is a ModR/M byte and a SIB byte. |
- bool ProcessModrm(unsigned char* start, unsigned int* size); |
- |
- // Processes the SIB byte that it is pointed to. |
- // start: Pointer to the SIB byte. |
- // mod: The mod field from the ModR/M byte. |
- // Returns 1 to indicate success (indicates 1 SIB byte) |
- bool ProcessSib(unsigned char* start, unsigned char mod, unsigned int* size); |
- |
- // The instruction type we have decoded from the opcode. |
- InstructionType instruction_type_; |
- |
- // Counts the number of bytes that is occupied by operands in |
- // the current instruction (note: we don't care about how large |
- // operands stored in registers etc. are). |
- unsigned int operand_bytes_; |
- |
- // True iff there is a ModR/M byte in this instruction. |
- bool have_modrm_; |
- |
- // True iff we need to decode the ModR/M byte (sometimes it just |
- // points to a register, we can tell by the addressing mode). |
- bool should_decode_modrm_; |
- |
- // Current operand size is 32 bits if true, 16 bits if false. |
- bool operand_is_32_bits_; |
- |
- // Default operand size is 32 bits if true, 16 bits if false. |
- bool operand_default_is_32_bits_; |
- |
- // Current address size is 32 bits if true, 16 bits if false. |
- bool address_is_32_bits_; |
- |
- // Default address size is 32 bits if true, 16 bits if false. |
- bool address_default_is_32_bits_; |
- |
- // Huge big opcode table based on the IA-32 manual, defined |
- // in Ia32OpcodeMap.cpp |
- static const OpcodeTable s_ia32_opcode_map_[]; |
- |
- // Somewhat smaller table to help with decoding ModR/M bytes |
- // when 16-bit addressing mode is being used. Defined in |
- // Ia32ModrmMap.cpp |
- static const ModrmEntry s_ia16_modrm_map_[]; |
- |
- // Somewhat smaller table to help with decoding ModR/M bytes |
- // when 32-bit addressing mode is being used. Defined in |
- // Ia32ModrmMap.cpp |
- static const ModrmEntry s_ia32_modrm_map_[]; |
- |
- // Indicators of whether we got certain prefixes that certain |
- // silly Intel instructions depend on in nonstandard ways for |
- // their behaviors. |
- bool got_f2_prefix_, got_f3_prefix_, got_66_prefix_; |
-}; |
- |
-}; // namespace sidestep |
- |
-#endif // SANDBOX_SRC_SIDESTEP_MINI_DISASSEMBLER_H__ |