| /*===-- 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 a public interface to a disassembler library. *| |
| |* LLVM provides an implementation of this interface. *| |
| |* *| |
| \*===----------------------------------------------------------------------===*/ |
| |
| #ifndef LLVM_C_DISASSEMBLER_H |
| #define LLVM_C_DISASSEMBLER_H |
| |
| #include "llvm/Support/DataTypes.h" |
| #include <stddef.h> |
| |
| /** |
| * @defgroup LLVMCDisassembler Disassembler |
| * @ingroup LLVMC |
| * |
| * @{ |
| */ |
| |
| /** |
| * 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 |
| * information 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, otherwise it returns 0. |
| */ |
| typedef int (*LLVMOpInfoCallback)(void *DisInfo, uint64_t PC, |
| uint64_t Offset, uint64_t Size, |
| int TagType, void *TagBuf); |
| |
| /** |
| * The initial support in LLVM MC for the most general form of a relocatable |
| * expression is "AddSymbol - SubtractSymbol + Offset". For some Darwin targets |
| * this full form is encoded in the relocation information so that AddSymbol and |
| * SubtractSymbol can be link edited independent of each other. Many other |
| * platforms only allow a relocatable expression of the form AddSymbol + Offset |
| * to be encoded. |
| * |
| * The LLVMOpInfoCallback() for the TagType value of 1 uses the struct |
| * LLVMOpInfo1. The value of the relocatable expression for the operand, |
| * including any PC adjustment, is passed in to the call back in the Value |
| * field. The symbolic information about the operand is returned using all |
| * the fields of the structure with the Offset of the relocatable expression |
| * returned in the Value field. It is possible that some symbols in the |
| * relocatable expression were assembly temporary symbols, for example |
| * "Ldata - LpicBase + constant", and only the Values of the symbols without |
| * symbol names are present in the relocation information. The VariantKind |
| * type is one of the Target specific #defines below and is used to print |
| * operands like "_foo@GOT", ":lower16:_foo", etc. |
| */ |
| struct LLVMOpInfoSymbol1 { |
| uint64_t Present; /* 1 if this symbol is present */ |
| const char *Name; /* symbol name if not NULL */ |
| uint64_t Value; /* symbol value if name is NULL */ |
| }; |
| |
| struct LLVMOpInfo1 { |
| struct LLVMOpInfoSymbol1 AddSymbol; |
| struct LLVMOpInfoSymbol1 SubtractSymbol; |
| uint64_t Value; |
| uint64_t VariantKind; |
| }; |
| |
| /** |
| * The operand VariantKinds for symbolic disassembly. |
| */ |
| #define LLVMDisassembler_VariantKind_None 0 /* all targets */ |
| |
| /** |
| * The ARM target VariantKinds. |
| */ |
| #define LLVMDisassembler_VariantKind_ARM_HI16 1 /* :upper16: */ |
| #define LLVMDisassembler_VariantKind_ARM_LO16 2 /* :lower16: */ |
| |
| /** |
| * The type for the symbol lookup function. This may be called by the |
| * disassembler for 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 the ReferenceValue to look up as a symbol. If no symbol is found |
| * for the ReferenceValue NULL is returned. The ReferenceType of the |
| * instruction is passed indirectly as is the PC of the instruction in |
| * ReferencePC. If the output reference can be determined its type is returned |
| * indirectly in ReferenceType along with ReferenceName if any, or that is set |
| * to NULL. |
| */ |
| typedef const char *(*LLVMSymbolLookupCallback)(void *DisInfo, |
| uint64_t ReferenceValue, |
| uint64_t *ReferenceType, |
| uint64_t ReferencePC, |
| const char **ReferenceName); |
| /** |
| * The reference types on input and output. |
| */ |
| /* No input reference type or no output reference type. */ |
| #define LLVMDisassembler_ReferenceType_InOut_None 0 |
| |
| /* The input reference is from a branch instruction. */ |
| #define LLVMDisassembler_ReferenceType_In_Branch 1 |
| /* The input reference is from a PC relative load instruction. */ |
| #define LLVMDisassembler_ReferenceType_In_PCrel_Load 2 |
| |
| /* The output reference is to as symbol stub. */ |
| #define LLVMDisassembler_ReferenceType_Out_SymbolStub 1 |
| /* The output reference is to a symbol address in a literal pool. */ |
| #define LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr 2 |
| /* The output reference is to a cstring address in a literal pool. */ |
| #define LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr 3 |
| |
| #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 specifying the |
| * TagType and callback functions as described above. These can all be passed |
| * as NULL. If successful, this returns a disassembler context. If not, it |
| * returns NULL. This function is equivalent to calling LLVMCreateDisasmCPU() |
| * with an empty CPU name. |
| */ |
| LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo, |
| int TagType, LLVMOpInfoCallback GetOpInfo, |
| LLVMSymbolLookupCallback SymbolLookUp); |
| |
| /** |
| * Create a disassembler for the TripleName and a specific CPU. Symbolic |
| * disassembly is supported by passing a block of information in the DisInfo |
| * parameter and specifying the TagType and callback functions as described |
| * above. These can all be passed * as NULL. If successful, this returns a |
| * disassembler context. If not, it returns NULL. |
| */ |
| LLVMDisasmContextRef LLVMCreateDisasmCPU(const char *Triple, const char *CPU, |
| void *DisInfo, int TagType, |
| LLVMOpInfoCallback GetOpInfo, |
| LLVMSymbolLookupCallback SymbolLookUp); |
| |
| /** |
| * Set the disassembler's options. Returns 1 if it can set the Options and 0 |
| * otherwise. |
| */ |
| int LLVMSetDisasmOptions(LLVMDisasmContextRef DC, uint64_t Options); |
| |
| /* The option to produce marked up assembly. */ |
| #define LLVMDisassembler_Option_UseMarkup 1 |
| /* The option to print immediates as hex. */ |
| #define LLVMDisassembler_Option_PrintImmHex 2 |
| /* The option use the other assembler printer variant */ |
| #define LLVMDisassembler_Option_AsmPrinterVariant 4 |
| |
| /** |
| * Dispose of a disassembler context. |
| */ |
| void LLVMDisasmDispose(LLVMDisasmContextRef DC); |
| |
| /** |
| * Disassemble a single instruction using the disassembler context specified in |
| * the parameter DC. The bytes of the instruction 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 whose 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. |
| */ |
| 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) */ |
