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517 lines
17 KiB
C
517 lines
17 KiB
C
/*===-- llvm-c/EnhancedDisassembly.h - Disassembler C Interface ---*- C -*-===*\
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|* *|
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|* The LLVM Compiler Infrastructure *|
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|* *|
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|* This file is distributed under the University of Illinois Open Source *|
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|* License. See LICENSE.TXT for details. *|
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|* *|
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|*===----------------------------------------------------------------------===*|
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|* *|
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|* This header declares the C interface to EnhancedDisassembly.so, which *|
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|* implements a disassembler with the ability to extract operand values and *|
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|* individual tokens from assembly instructions. *|
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|* *|
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|* The header declares additional interfaces if the host compiler supports *|
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|* the blocks API. *|
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|* *|
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\*===----------------------------------------------------------------------===*/
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#ifndef LLVM_C_ENHANCEDDISASSEMBLY_H
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#define LLVM_C_ENHANCEDDISASSEMBLY_H
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#include "llvm/System/DataTypes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*!
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@typedef EDByteReaderCallback
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Interface to memory from which instructions may be read.
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@param byte A pointer whose target should be filled in with the data returned.
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@param address The address of the byte to be read.
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@param arg An anonymous argument for client use.
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@result 0 on success; -1 otherwise.
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*/
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typedef int (*EDByteReaderCallback)(uint8_t *byte, uint64_t address, void *arg);
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/*!
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@typedef EDRegisterReaderCallback
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Interface to registers from which registers may be read.
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@param value A pointer whose target should be filled in with the value of the
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register.
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@param regID The LLVM register identifier for the register to read.
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@param arg An anonymous argument for client use.
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@result 0 if the register could be read; -1 otherwise.
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*/
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typedef int (*EDRegisterReaderCallback)(uint64_t *value, unsigned regID,
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void* arg);
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/*!
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@typedef EDAssemblySyntax_t
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An assembly syntax for use in tokenizing instructions.
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*/
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typedef enum {
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/*! @constant kEDAssemblySyntaxX86Intel Intel syntax for i386 and x86_64. */
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kEDAssemblySyntaxX86Intel = 0,
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/*! @constant kEDAssemblySyntaxX86ATT AT&T syntax for i386 and x86_64. */
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kEDAssemblySyntaxX86ATT = 1,
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kEDAssemblySyntaxARMUAL = 2
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} EDAssemblySyntax_t;
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/*!
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@typedef EDDisassemblerRef
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Encapsulates a disassembler for a single CPU architecture.
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*/
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struct EDDisassembler;
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typedef struct EDDisassembler *EDDisassemblerRef;
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/*!
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@typedef EDInstRef
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Encapsulates a single disassembled instruction in one assembly syntax.
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*/
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struct EDInst;
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typedef struct EDInst *EDInstRef;
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/*!
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@typedef EDTokenRef
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Encapsulates a token from the disassembly of an instruction.
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*/
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struct EDToken;
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typedef struct EDToken *EDTokenRef;
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/*!
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@typedef EDOperandRef
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Encapsulates an operand of an instruction.
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*/
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struct EDOperand;
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typedef struct EDOperand *EDOperandRef;
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/*!
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@functiongroup Getting a disassembler
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*/
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/*!
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@function EDGetDisassembler
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Gets the disassembler for a given target.
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@param disassembler A pointer whose target will be filled in with the
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disassembler.
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@param triple Identifies the target. Example: "x86_64-apple-darwin10"
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@param syntax The assembly syntax to use when decoding instructions.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetDisassembler(EDDisassemblerRef *disassembler,
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const char *triple,
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EDAssemblySyntax_t syntax);
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/*!
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@functiongroup Generic architectural queries
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*/
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/*!
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@function EDGetRegisterName
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Gets the human-readable name for a given register.
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@param regName A pointer whose target will be pointed at the name of the
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register. The name does not need to be deallocated and will be
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@param disassembler The disassembler to query for the name.
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@param regID The register identifier, as returned by EDRegisterTokenValue.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetRegisterName(const char** regName,
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EDDisassemblerRef disassembler,
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unsigned regID);
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/*!
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@function EDRegisterIsStackPointer
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Determines if a register is one of the platform's stack-pointer registers.
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@param disassembler The disassembler to query.
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@param regID The register identifier, as returned by EDRegisterTokenValue.
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@result 1 if true; 0 otherwise.
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*/
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int EDRegisterIsStackPointer(EDDisassemblerRef disassembler,
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unsigned regID);
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/*!
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@function EDRegisterIsProgramCounter
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Determines if a register is one of the platform's stack-pointer registers.
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@param disassembler The disassembler to query.
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@param regID The register identifier, as returned by EDRegisterTokenValue.
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@result 1 if true; 0 otherwise.
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*/
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int EDRegisterIsProgramCounter(EDDisassemblerRef disassembler,
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unsigned regID);
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/*!
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@functiongroup Creating and querying instructions
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*/
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/*!
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@function EDCreateInst
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Gets a set of contiguous instructions from a disassembler.
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@param insts A pointer to an array that will be filled in with the
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instructions. Must have at least count entries. Entries not filled in will
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be set to NULL.
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@param count The maximum number of instructions to fill in.
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@param disassembler The disassembler to use when decoding the instructions.
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@param byteReader The function to use when reading the instruction's machine
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code.
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@param address The address of the first byte of the instruction.
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@param arg An anonymous argument to be passed to byteReader.
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@result The number of instructions read on success; 0 otherwise.
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*/
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unsigned int EDCreateInsts(EDInstRef *insts,
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unsigned int count,
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EDDisassemblerRef disassembler,
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EDByteReaderCallback byteReader,
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uint64_t address,
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void *arg);
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/*!
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@function EDReleaseInst
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Frees the memory for an instruction. The instruction can no longer be accessed
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after this call.
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@param inst The instruction to be freed.
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*/
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void EDReleaseInst(EDInstRef inst);
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/*!
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@function EDInstByteSize
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@param inst The instruction to be queried.
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@result The number of bytes in the instruction's machine-code representation.
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*/
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int EDInstByteSize(EDInstRef inst);
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/*!
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@function EDGetInstString
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Gets the disassembled text equivalent of the instruction.
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@param buf A pointer whose target will be filled in with a pointer to the
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string. (The string becomes invalid when the instruction is released.)
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@param inst The instruction to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetInstString(const char **buf,
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EDInstRef inst);
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/*!
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@function EDInstID
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@param instID A pointer whose target will be filled in with the LLVM identifier
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for the instruction.
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@param inst The instruction to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDInstID(unsigned *instID, EDInstRef inst);
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/*!
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@function EDInstIsBranch
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@param inst The instruction to be queried.
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@result 1 if the instruction is a branch instruction; 0 if it is some other
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type of instruction; -1 if there was an error.
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*/
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int EDInstIsBranch(EDInstRef inst);
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/*!
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@function EDInstIsMove
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@param inst The instruction to be queried.
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@result 1 if the instruction is a move instruction; 0 if it is some other
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type of instruction; -1 if there was an error.
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*/
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int EDInstIsMove(EDInstRef inst);
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/*!
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@function EDBranchTargetID
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@param inst The instruction to be queried.
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@result The ID of the branch target operand, suitable for use with
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EDCopyOperand. -1 if no such operand exists.
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*/
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int EDBranchTargetID(EDInstRef inst);
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/*!
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@function EDMoveSourceID
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@param inst The instruction to be queried.
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@result The ID of the move source operand, suitable for use with
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EDCopyOperand. -1 if no such operand exists.
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*/
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int EDMoveSourceID(EDInstRef inst);
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/*!
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@function EDMoveTargetID
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@param inst The instruction to be queried.
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@result The ID of the move source operand, suitable for use with
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EDCopyOperand. -1 if no such operand exists.
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*/
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int EDMoveTargetID(EDInstRef inst);
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/*!
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@functiongroup Creating and querying tokens
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*/
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/*!
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@function EDNumTokens
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@param inst The instruction to be queried.
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@result The number of tokens in the instruction, or -1 on error.
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*/
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int EDNumTokens(EDInstRef inst);
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/*!
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@function EDGetToken
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Retrieves a token from an instruction. The token is valid until the
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instruction is released.
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@param token A pointer to be filled in with the token.
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@param inst The instruction to be queried.
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@param index The index of the token in the instruction.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetToken(EDTokenRef *token,
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EDInstRef inst,
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int index);
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/*!
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@function EDGetTokenString
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Gets the disassembled text for a token.
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@param buf A pointer whose target will be filled in with a pointer to the
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string. (The string becomes invalid when the token is released.)
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@param token The token to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetTokenString(const char **buf,
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EDTokenRef token);
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/*!
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@function EDOperandIndexForToken
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Returns the index of the operand to which a token belongs.
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@param token The token to be queried.
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@result The operand index on success; -1 otherwise
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*/
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int EDOperandIndexForToken(EDTokenRef token);
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/*!
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@function EDTokenIsWhitespace
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@param token The token to be queried.
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@result 1 if the token is whitespace; 0 if not; -1 on error.
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*/
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int EDTokenIsWhitespace(EDTokenRef token);
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/*!
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@function EDTokenIsPunctuation
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@param token The token to be queried.
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@result 1 if the token is punctuation; 0 if not; -1 on error.
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*/
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int EDTokenIsPunctuation(EDTokenRef token);
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/*!
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@function EDTokenIsOpcode
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@param token The token to be queried.
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@result 1 if the token is opcode; 0 if not; -1 on error.
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*/
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int EDTokenIsOpcode(EDTokenRef token);
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/*!
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@function EDTokenIsLiteral
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@param token The token to be queried.
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@result 1 if the token is a numeric literal; 0 if not; -1 on error.
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*/
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int EDTokenIsLiteral(EDTokenRef token);
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/*!
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@function EDTokenIsRegister
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@param token The token to be queried.
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@result 1 if the token identifies a register; 0 if not; -1 on error.
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*/
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int EDTokenIsRegister(EDTokenRef token);
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/*!
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@function EDTokenIsNegativeLiteral
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@param token The token to be queried.
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@result 1 if the token is a negative signed literal; 0 if not; -1 on error.
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*/
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int EDTokenIsNegativeLiteral(EDTokenRef token);
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/*!
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@function EDLiteralTokenAbsoluteValue
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@param value A pointer whose target will be filled in with the absolute value
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of the literal.
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@param token The token to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDLiteralTokenAbsoluteValue(uint64_t *value,
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EDTokenRef token);
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/*!
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@function EDRegisterTokenValue
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@param registerID A pointer whose target will be filled in with the LLVM
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register identifier for the token.
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@param token The token to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDRegisterTokenValue(unsigned *registerID,
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EDTokenRef token);
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/*!
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@functiongroup Creating and querying operands
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*/
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/*!
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@function EDNumOperands
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@param inst The instruction to be queried.
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@result The number of operands in the instruction, or -1 on error.
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*/
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int EDNumOperands(EDInstRef inst);
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/*!
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@function EDGetOperand
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Retrieves an operand from an instruction. The operand is valid until the
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instruction is released.
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@param operand A pointer to be filled in with the operand.
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@param inst The instruction to be queried.
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@param index The index of the operand in the instruction.
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@result 0 on success; -1 otherwise.
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*/
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int EDGetOperand(EDOperandRef *operand,
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EDInstRef inst,
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int index);
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/*!
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@function EDOperandIsRegister
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@param operand The operand to be queried.
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@result 1 if the operand names a register; 0 if not; -1 on error.
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*/
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int EDOperandIsRegister(EDOperandRef operand);
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/*!
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@function EDOperandIsImmediate
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@param operand The operand to be queried.
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@result 1 if the operand specifies an immediate value; 0 if not; -1 on error.
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*/
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int EDOperandIsImmediate(EDOperandRef operand);
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/*!
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@function EDOperandIsMemory
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@param operand The operand to be queried.
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@result 1 if the operand specifies a location in memory; 0 if not; -1 on error.
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*/
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int EDOperandIsMemory(EDOperandRef operand);
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/*!
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@function EDRegisterOperandValue
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@param value A pointer whose target will be filled in with the LLVM register ID
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of the register named by the operand.
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@param operand The operand to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDRegisterOperandValue(unsigned *value,
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EDOperandRef operand);
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/*!
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@function EDImmediateOperandValue
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@param value A pointer whose target will be filled in with the value of the
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immediate.
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@param operand The operand to be queried.
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@result 0 on success; -1 otherwise.
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*/
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int EDImmediateOperandValue(uint64_t *value,
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EDOperandRef operand);
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/*!
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@function EDEvaluateOperand
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Evaluates an operand using a client-supplied register state accessor. Register
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operands are evaluated by reading the value of the register; immediate operands
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are evaluated by reporting the immediate value; memory operands are evaluated
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by computing the target address (with only those relocations applied that were
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already applied to the original bytes).
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@param result A pointer whose target is to be filled with the result of
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evaluating the operand.
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@param operand The operand to be evaluated.
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@param regReader The function to use when reading registers from the register
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state.
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@param arg An anonymous argument for client use.
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@result 0 if the operand could be evaluated; -1 otherwise.
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*/
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int EDEvaluateOperand(uint64_t *result,
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EDOperandRef operand,
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EDRegisterReaderCallback regReader,
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void *arg);
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#ifdef __BLOCKS__
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/*!
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@typedef EDByteBlock_t
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Block-based interface to memory from which instructions may be read.
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@param byte A pointer whose target should be filled in with the data returned.
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@param address The address of the byte to be read.
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@result 0 on success; -1 otherwise.
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*/
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typedef int (^EDByteBlock_t)(uint8_t *byte, uint64_t address);
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/*!
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@typedef EDRegisterBlock_t
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Block-based interface to registers from which registers may be read.
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@param value A pointer whose target should be filled in with the value of the
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register.
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@param regID The LLVM register identifier for the register to read.
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@result 0 if the register could be read; -1 otherwise.
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*/
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typedef int (^EDRegisterBlock_t)(uint64_t *value, unsigned regID);
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/*!
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@typedef EDTokenVisitor_t
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Block-based handler for individual tokens.
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@param token The current token being read.
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@result 0 to continue; 1 to stop normally; -1 on error.
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*/
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typedef int (^EDTokenVisitor_t)(EDTokenRef token);
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/*! @functiongroup Block-based interfaces */
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/*!
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@function EDBlockCreateInsts
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Gets a set of contiguous instructions from a disassembler, using a block to
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read memory.
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@param insts A pointer to an array that will be filled in with the
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instructions. Must have at least count entries. Entries not filled in will
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be set to NULL.
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@param count The maximum number of instructions to fill in.
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@param disassembler The disassembler to use when decoding the instructions.
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@param byteBlock The block to use when reading the instruction's machine
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code.
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@param address The address of the first byte of the instruction.
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@result The number of instructions read on success; 0 otherwise.
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*/
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unsigned int EDBlockCreateInsts(EDInstRef *insts,
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int count,
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EDDisassemblerRef disassembler,
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EDByteBlock_t byteBlock,
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uint64_t address);
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/*!
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@function EDBlockEvaluateOperand
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Evaluates an operand using a block to read registers.
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@param result A pointer whose target is to be filled with the result of
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evaluating the operand.
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@param operand The operand to be evaluated.
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@param regBlock The block to use when reading registers from the register
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state.
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@result 0 if the operand could be evaluated; -1 otherwise.
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*/
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int EDBlockEvaluateOperand(uint64_t *result,
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EDOperandRef operand,
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EDRegisterBlock_t regBlock);
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/*!
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@function EDBlockVisitTokens
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Visits every token with a visitor.
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@param inst The instruction with the tokens to be visited.
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@param visitor The visitor.
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@result 0 if the visit ended normally; -1 if the visitor encountered an error
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or there was some other error.
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*/
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int EDBlockVisitTokens(EDInstRef inst,
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EDTokenVisitor_t visitor);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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