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-// Copyright 2015, ARM Limited
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-// * Redistributions of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above copyright notice,
-// this list of conditions and the following disclaimer in the documentation
-// and/or other materials provided with the distribution.
-// * Neither the name of ARM Limited nor the names of its contributors may be
-// used to endorse or promote products derived from this software without
-// specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
-// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
-// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef VIXL_A64_DISASM_A64_H
-#define VIXL_A64_DISASM_A64_H
-
-#include "vixl/globals.h"
-#include "vixl/utils.h"
-#include "vixl/a64/instructions-a64.h"
-#include "vixl/a64/decoder-a64.h"
-#include "vixl/a64/assembler-a64.h"
-
-namespace vixl {
-
-class Disassembler: public DecoderVisitor {
- public:
- Disassembler();
- Disassembler(char* text_buffer, int buffer_size);
- virtual ~Disassembler();
- char* GetOutput();
-
- // Declare all Visitor functions.
- #define DECLARE(A) virtual void Visit##A(const Instruction* instr);
- VISITOR_LIST(DECLARE)
- #undef DECLARE
-
- protected:
- virtual void ProcessOutput(const Instruction* instr);
-
- // Default output functions. The functions below implement a default way of
- // printing elements in the disassembly. A sub-class can override these to
- // customize the disassembly output.
-
- // Prints the name of a register.
- // TODO: This currently doesn't allow renaming of V registers.
- virtual void AppendRegisterNameToOutput(const Instruction* instr,
- const CPURegister& reg);
-
- // Prints a PC-relative offset. This is used for example when disassembling
- // branches to immediate offsets.
- virtual void AppendPCRelativeOffsetToOutput(const Instruction* instr,
- int64_t offset);
-
- // Prints an address, in the general case. It can be code or data. This is
- // used for example to print the target address of an ADR instruction.
- virtual void AppendCodeRelativeAddressToOutput(const Instruction* instr,
- const void* addr);
-
- // Prints the address of some code.
- // This is used for example to print the target address of a branch to an
- // immediate offset.
- // A sub-class can for example override this method to lookup the address and
- // print an appropriate name.
- virtual void AppendCodeRelativeCodeAddressToOutput(const Instruction* instr,
- const void* addr);
-
- // Prints the address of some data.
- // This is used for example to print the source address of a load literal
- // instruction.
- virtual void AppendCodeRelativeDataAddressToOutput(const Instruction* instr,
- const void* addr);
-
- // Same as the above, but for addresses that are not relative to the code
- // buffer. They are currently not used by VIXL.
- virtual void AppendAddressToOutput(const Instruction* instr,
- const void* addr);
- virtual void AppendCodeAddressToOutput(const Instruction* instr,
- const void* addr);
- virtual void AppendDataAddressToOutput(const Instruction* instr,
- const void* addr);
-
- public:
- // Get/Set the offset that should be added to code addresses when printing
- // code-relative addresses in the AppendCodeRelative<Type>AddressToOutput()
- // helpers.
- // Below is an example of how a branch immediate instruction in memory at
- // address 0xb010200 would disassemble with different offsets.
- // Base address | Disassembly
- // 0x0 | 0xb010200: b #+0xcc (addr 0xb0102cc)
- // 0x10000 | 0xb000200: b #+0xcc (addr 0xb0002cc)
- // 0xb010200 | 0x0: b #+0xcc (addr 0xcc)
- void MapCodeAddress(int64_t base_address, const Instruction* instr_address);
- int64_t CodeRelativeAddress(const void* instr);
-
- private:
- void Format(
- const Instruction* instr, const char* mnemonic, const char* format);
- void Substitute(const Instruction* instr, const char* string);
- int SubstituteField(const Instruction* instr, const char* format);
- int SubstituteRegisterField(const Instruction* instr, const char* format);
- int SubstituteImmediateField(const Instruction* instr, const char* format);
- int SubstituteLiteralField(const Instruction* instr, const char* format);
- int SubstituteBitfieldImmediateField(
- const Instruction* instr, const char* format);
- int SubstituteShiftField(const Instruction* instr, const char* format);
- int SubstituteExtendField(const Instruction* instr, const char* format);
- int SubstituteConditionField(const Instruction* instr, const char* format);
- int SubstitutePCRelAddressField(const Instruction* instr, const char* format);
- int SubstituteBranchTargetField(const Instruction* instr, const char* format);
- int SubstituteLSRegOffsetField(const Instruction* instr, const char* format);
- int SubstitutePrefetchField(const Instruction* instr, const char* format);
- int SubstituteBarrierField(const Instruction* instr, const char* format);
- int SubstituteSysOpField(const Instruction* instr, const char* format);
- int SubstituteCrField(const Instruction* instr, const char* format);
- bool RdIsZROrSP(const Instruction* instr) const {
- return (instr->Rd() == kZeroRegCode);
- }
-
- bool RnIsZROrSP(const Instruction* instr) const {
- return (instr->Rn() == kZeroRegCode);
- }
-
- bool RmIsZROrSP(const Instruction* instr) const {
- return (instr->Rm() == kZeroRegCode);
- }
-
- bool RaIsZROrSP(const Instruction* instr) const {
- return (instr->Ra() == kZeroRegCode);
- }
-
- bool IsMovzMovnImm(unsigned reg_size, uint64_t value);
-
- int64_t code_address_offset() const { return code_address_offset_; }
-
- protected:
- void ResetOutput();
- void AppendToOutput(const char* string, ...) PRINTF_CHECK(2, 3);
-
- void set_code_address_offset(int64_t code_address_offset) {
- code_address_offset_ = code_address_offset;
- }
-
- char* buffer_;
- uint32_t buffer_pos_;
- uint32_t buffer_size_;
- bool own_buffer_;
-
- int64_t code_address_offset_;
-};
-
-
-class PrintDisassembler: public Disassembler {
- public:
- explicit PrintDisassembler(FILE* stream) : stream_(stream) { }
-
- protected:
- virtual void ProcessOutput(const Instruction* instr);
-
- private:
- FILE *stream_;
-};
-} // namespace vixl
-
-#endif // VIXL_A64_DISASM_A64_H
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