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/*===-- llvm-c/Disassembler.h - Disassembler Public C Interface ---*- C -*-===*\
|* *|
|* The LLVM Compiler Infrastructure *|
|* *|
|* This file is distributed under the University of Illinois Open Source *|
|* License. See LICENSE.TXT for details. *|
|* *|
|*===----------------------------------------------------------------------===*|
|* *|
|* This header provides public interface to a disassembler library. *|
|* LLVM provides an implementation of this interface. *|
|* *|
\*===----------------------------------------------------------------------===*/
#ifndef LLVM_C_DISASSEMBLER_H
#define LLVM_C_DISASSEMBLER_H 1
#include <stdint.h>
#include <stddef.h>
/**
* An opaque reference to a disassembler context.
*/
typedef void *LLVMDisasmContextRef;
/**
* The type for the operand information call back function. This is called to
* get the symbolic information for an operand of an instruction. Typically
* this is from the relocation information, symbol table, etc. That block of
* information is saved when the disassembler context is created and passed to
* the call back in the DisInfo parameter. The instruction containing operand
* is at the PC parameter. For some instruction sets, there can be more than
* one operand with symbolic information. To determine the symbolic operand
* infomation for each operand, the bytes for the specific operand in the
* instruction are specified by the Offset parameter and its byte widith is the
* size parameter. For instructions sets with fixed widths and one symbolic
* operand per instruction, the Offset parameter will be zero and Size parameter
* will be the instruction width. The information is returned in TagBuf and is
* Triple specific with its specific information defined by the value of
* TagType for that Triple. If symbolic information is returned the function
* returns 1 else it returns 0.
*/
typedef int (*LLVMOpInfoCallback)(void *DisInfo,
uint64_t PC,
uint64_t Offset,
uint64_t Size,
int TagType,
void *TagBuf);
/**
* The type for the symbol lookup function. This may be called by the
* disassembler for such things like adding a comment for a PC plus a constant
* offset load instruction to use a symbol name instead of a load address value.
* It is passed the block information is saved when the disassembler context is
* created and a value of a symbol to look up. If no symbol is found NULL is
* to be returned.
*/
typedef const char *(*LLVMSymbolLookupCallback)(void *DisInfo,
uint64_t SymbolValue);
#ifdef __cplusplus
extern "C" {
#endif /* !defined(__cplusplus) */
/**
* Create a disassembler for the TripleName. Symbolic disassembly is supported
* by passing a block of information in the DisInfo parameter and specifing the
* TagType and call back functions as described above. These can all be passed
* as NULL. If successfull this returns a disassembler context if not it
* returns NULL.
*/
extern LLVMDisasmContextRef
LLVMCreateDisasm(const char *TripleName,
void *DisInfo,
int TagType,
LLVMOpInfoCallback GetOpInfo,
LLVMSymbolLookupCallback SymbolLookUp);
/**
* Dispose of a disassembler context.
*/
extern void
LLVMDisasmDispose(LLVMDisasmContextRef DC);
/**
* Disassmble a single instruction using the disassembler context specified in
* the parameter DC. The bytes of the instuction are specified in the parameter
* Bytes, and contains at least BytesSize number of bytes. The instruction is
* at the address specified by the PC parameter. If a valid instruction can be
* disassembled its string is returned indirectly in OutString which whos size
* is specified in the parameter OutStringSize. This function returns the
* number of bytes in the instruction or zero if there was no valid instruction.
*/
extern size_t
LLVMDisasmInstruction(LLVMDisasmContextRef DC,
uint8_t *Bytes,
uint64_t BytesSize,
uint64_t PC,
char *OutString,
size_t OutStringSize);
#ifdef __cplusplus
}
#endif /* !defined(__cplusplus) */
#endif /* !defined(LLVM_C_DISASSEMBLER_H) */
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