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Diffstat (limited to 'include/llvm-c/Disassembler.h')
| -rw-r--r-- | include/llvm-c/Disassembler.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/include/llvm-c/Disassembler.h b/include/llvm-c/Disassembler.h new file mode 100644 index 0000000..7420630 --- /dev/null +++ b/include/llvm-c/Disassembler.h @@ -0,0 +1,106 @@ +/*===-- 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) */ |