blob: fafebea67186d6cffdd827a572f53f4e4bb0234c [file] [log] [blame]
/*
* Copyright (C) 2012-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#include <wtf/Assertions.h>
#include <stdint.h>
namespace JSC { namespace ARM64Disassembler {
class A64DOpcode {
private:
class OpcodeGroup {
WTF_MAKE_FAST_ALLOCATED;
public:
OpcodeGroup(uint32_t opcodeMask, uint32_t opcodePattern, const char* (*format)(A64DOpcode*))
: m_opcodeMask(opcodeMask)
, m_opcodePattern(opcodePattern)
, m_format(format)
, m_next(0)
{
}
void setNext(OpcodeGroup* next)
{
m_next = next;
}
OpcodeGroup* next()
{
return m_next;
}
bool matches(uint32_t opcode)
{
return (opcode & m_opcodeMask) == m_opcodePattern;
}
const char* format(A64DOpcode* thisObj)
{
return m_format(thisObj);
}
private:
uint32_t m_opcodeMask;
uint32_t m_opcodePattern;
const char* (*m_format)(A64DOpcode*);
OpcodeGroup* m_next;
};
public:
static void init();
A64DOpcode()
: m_opcode(0)
, m_bufferOffset(0)
{
init();
m_formatBuffer[0] = '\0';
}
const char* disassemble(uint32_t* currentPC);
protected:
void setPCAndOpcode(uint32_t*, uint32_t);
const char* format();
static const char* const s_conditionNames[16];
static const char* const s_shiftNames[4];
static const char* const s_optionName[8];
static const char s_FPRegisterPrefix[5];
static const char* conditionName(unsigned condition) { return s_conditionNames[condition & 0xf]; }
static const char* shiftName(unsigned shiftValue) { return s_shiftNames[shiftValue & 0x3]; }
const char* optionName() { return s_optionName[option()]; }
static char FPRegisterPrefix(unsigned FPRegisterSize)
{
if (FPRegisterSize > 4)
FPRegisterSize = 4;
return s_FPRegisterPrefix[FPRegisterSize];
}
unsigned opcodeGroupNumber(uint32_t opcode) { return (opcode >> 24) & 0x1f; }
bool is64Bit() { return m_opcode & 0x80000000; }
unsigned size() { return m_opcode >> 30; }
unsigned option() { return (m_opcode >> 13) & 0x7; }
unsigned rd() { return m_opcode & 0x1f; }
unsigned rt() { return m_opcode & 0x1f; }
unsigned rn() { return (m_opcode >> 5) & 0x1f; }
unsigned rm() { return (m_opcode >> 16) & 0x1f; }
void bufferPrintf(const char* format, ...) WTF_ATTRIBUTE_PRINTF(2, 3);
void appendInstructionName(const char* instructionName)
{
bufferPrintf(" %-9.9s", instructionName);
}
void appendRegisterName(unsigned registerNumber, bool is64Bit = true);
void appendSPOrRegisterName(unsigned registerNumber, bool is64Bit = true)
{
if (registerNumber == 31) {
bufferPrintf(is64Bit ? "sp" : "wsp");
return;
}
appendRegisterName(registerNumber, is64Bit);
}
void appendZROrRegisterName(unsigned registerNumber, bool is64Bit = true)
{
if (registerNumber == 31) {
bufferPrintf(is64Bit ? "xzr" : "wzr");
return;
}
appendRegisterName(registerNumber, is64Bit);
}
void appendFPRegisterName(unsigned registerNumber, unsigned registerSize);
void appendSeparator()
{
bufferPrintf(", ");
}
void appendCharacter(const char c)
{
bufferPrintf("%c", c);
}
void appendString(const char* string)
{
bufferPrintf("%s", string);
}
void appendShiftType(unsigned shiftValue)
{
bufferPrintf("%s ", shiftName(shiftValue));
}
void appendSignedImmediate(int immediate)
{
bufferPrintf("#%d", immediate);
}
void appendSignedImmediate64(int64_t immediate)
{
bufferPrintf("#%" PRIi64, immediate);
}
void appendUnsignedImmediate(unsigned immediate)
{
bufferPrintf("#%u", immediate);
}
void appendUnsignedHexImmediate(unsigned immediate)
{
bufferPrintf("#0x%x", immediate);
}
void appendUnsignedImmediate64(uint64_t immediate)
{
bufferPrintf("#0x%" PRIx64, immediate);
}
void appendPCRelativeOffset(uint32_t* pc, int32_t immediate)
{
bufferPrintf("0x%" PRIxPTR, bitwise_cast<uintptr_t>(pc + immediate));
}
void appendShiftAmount(unsigned amount)
{
bufferPrintf("lsl #%u", 16 * amount);
}
static constexpr int bufferSize = 81;
char m_formatBuffer[bufferSize];
uint32_t* m_currentPC;
uint32_t m_opcode;
int m_bufferOffset;
private:
static OpcodeGroup* opcodeTable[32];
static bool s_initialized;
};
#define DEFINE_STATIC_FORMAT(klass, thisObj) \
static const char* format(A64DOpcode* thisObj) { return reinterpret_cast< klass *>(thisObj)->format(); }
class A64DOpcodeAddSubtract : public A64DOpcode {
private:
static const char* const s_opNames[4];
public:
const char* opName() { return s_opNames[opAndS()]; }
const char* cmpName() { return op() ? "cmp" : "cmn"; }
bool isCMP() { return (sBit() && rd() == 31); }
unsigned op() { return (m_opcode >> 30) & 0x1; }
unsigned sBit() { return (m_opcode >> 29) & 0x1; }
unsigned opAndS() { return (m_opcode >> 29) & 0x3; }
};
class A64DOpcodeAddSubtractImmediate : public A64DOpcodeAddSubtract {
public:
static constexpr uint32_t mask = 0x1f000000;
static constexpr uint32_t pattern = 0x11000000;
DEFINE_STATIC_FORMAT(A64DOpcodeAddSubtractImmediate, thisObj);
const char* format();
bool isMovSP() { return (!opAndS() && !immed12() && ((rd() == 31) || rn() == 31)); }
unsigned shift() { return (m_opcode >> 22) & 0x3; }
unsigned immed12() { return (m_opcode >> 10) & 0xfff; }
};
class A64DOpcodeAddSubtractExtendedRegister : public A64DOpcodeAddSubtract {
public:
static constexpr uint32_t mask = 0x1fe00000;
static constexpr uint32_t pattern = 0x0b200000;
DEFINE_STATIC_FORMAT(A64DOpcodeAddSubtractExtendedRegister, thisObj);
const char* format();
unsigned immediate3() { return (m_opcode >> 10) & 0x7; }
};
class A64DOpcodeAddSubtractShiftedRegister : public A64DOpcodeAddSubtract {
public:
static constexpr uint32_t mask = 0x1f200000;
static constexpr uint32_t pattern = 0x0b000000;
DEFINE_STATIC_FORMAT(A64DOpcodeAddSubtractShiftedRegister, thisObj);
const char* format();
bool isNeg() { return (op() && rn() == 31); }
const char* negName() { return sBit() ? "negs" : "neg"; }
unsigned shift() { return (m_opcode >> 22) & 0x3; }
int immediate6() { return (static_cast<uint32_t>((m_opcode >> 10) & 0x3f) << 26) >> 26; }
};
class A64DOpcodeBitfield : public A64DOpcode {
private:
static const char* const s_opNames[3];
static const char* const s_extendPseudoOpNames[3][3];
static const char* const s_insertOpNames[3];
static const char* const s_extractOpNames[3];
public:
static constexpr uint32_t mask = 0x1f800000;
static constexpr uint32_t pattern = 0x13000000;
DEFINE_STATIC_FORMAT(A64DOpcodeBitfield, thisObj);
const char* format();
const char* opName() { return s_opNames[opc()]; }
const char* extendPseudoOpNames(unsigned opSize) { return s_extendPseudoOpNames[opc()][opSize]; }
const char* insertOpNames() { return s_insertOpNames[opc()]; }
const char* extractOpNames() { return s_extractOpNames[opc()]; }
unsigned opc() { return (m_opcode >> 29) & 0x3; }
unsigned nBit() { return (m_opcode >> 22) & 0x1; }
unsigned immediateR() { return (m_opcode >> 16) & 0x3f; }
unsigned immediateS() { return (m_opcode >> 10) & 0x3f; }
};
class A64DOpcodeCompareAndBranchImmediate : public A64DOpcode {
public:
static constexpr uint32_t mask = 0x7e000000;
static constexpr uint32_t pattern = 0x34000000;
DEFINE_STATIC_FORMAT(A64DOpcodeCompareAndBranchImmediate, thisObj);
const char* format();
unsigned opBit() { return (m_opcode >> 24) & 0x1; }
int immediate19() { return (static_cast<int>((m_opcode >> 5) & 0x7ffff) << 13) >> 13; }
};
class A64DOpcodeConditionalBranchImmediate : public A64DOpcode {
public:
static constexpr uint32_t mask = 0xff000010;
static constexpr uint32_t pattern = 0x54000000;
DEFINE_STATIC_FORMAT(A64DOpcodeConditionalBranchImmediate, thisObj);
const char* format();
unsigned condition() { return m_opcode & 0xf; }
int immediate19() { return (static_cast<int>((m_opcode >> 5) & 0x7ffff) << 13) >> 13; }
};
class A64DOpcodeConditionalSelect : public A64DOpcode {
private:
static const char* const s_opNames[4];
public:
static constexpr uint32_t mask = 0x1fe00000;
static constexpr uint32_t pattern = 0x1a800000;
DEFINE_STATIC_FORMAT(A64DOpcodeConditionalSelect, thisObj);
const char* format();
const char* opName() { return s_opNames[opNum()]; }
unsigned opNum() { return (op() << 1 | (op2() & 0x1)); }
unsigned op() { return (m_opcode >> 30) & 0x1; }
unsigned sBit() { return (m_opcode >> 29) & 0x1; }
unsigned condition() { return (m_opcode >> 12) & 0xf; }
unsigned op2() { return (m_opcode >> 10) & 0x3; }
};
class A64DOpcodeDataProcessing1Source : public A64DOpcode {
private:
static const char* const s_opNames[8];
static const char* const s_pacAutOpNames[18];
public:
static constexpr uint32_t mask = 0x5fe00000;
static constexpr uint32_t pattern = 0x5ac00000;
DEFINE_STATIC_FORMAT(A64DOpcodeDataProcessing1Source, thisObj);
const char* format();
const char* opName() { return s_opNames[opNameIndex()]; }
unsigned sBit() { return (m_opcode >> 29) & 0x1; }
unsigned opCode() { return (m_opcode >> 10) & 0x3f; }
unsigned opCode2() { return (m_opcode >> 16) & 0x1f; }
unsigned opNameIndex() { return (opCode() & 0x7); }
};
class A64DOpcodeDataProcessing2Source : public A64DOpcode {
private:
static const char* const s_opNames[16];
public:
static constexpr uint32_t mask = 0x5fe00000;
static constexpr uint32_t pattern = 0x1ac00000;
DEFINE_STATIC_FORMAT(A64DOpcodeDataProcessing2Source, thisObj);
const char* format();
const char* opName() { return s_opNames[opNameIndex()]; }
unsigned sBit() { return (m_opcode >> 29) & 0x1; }
unsigned opCode() { return (m_opcode >> 10) & 0x3f; }
unsigned opNameIndex() { return (m_opcode >> 10) & 0xf; }
};
class A64DOpcodeDataProcessing3Source : public A64DOpcode {
private:
static const char* const s_opNames[16];
static const char* const s_pseudoOpNames[16];
public:
static constexpr uint32_t mask = 0x1f000000;
static constexpr uint32_t pattern = 0x1b000000;
DEFINE_STATIC_FORMAT(A64DOpcodeDataProcessing3Source, thisObj);
const char* format();
const char* opName() { return ra() == 31 ? s_pseudoOpNames[opNum() & 0xf] : s_opNames[opNum() & 0xf]; }
unsigned ra() { return (m_opcode >> 10) & 0x1f; }
unsigned op54() { return (m_opcode >> 29) & 0x3; }
unsigned op31() { return (m_opcode >> 21) & 0x7; }
unsigned op0() { return (m_opcode >> 15) & 0x1; }
unsigned opNum() { return ((m_opcode >> 25) & 0x30) | ((m_opcode >> 20) & 0xe) | ((m_opcode >> 15) & 0x1); }
};
class A64OpcodeExceptionGeneration : public A64DOpcode {
public:
static constexpr uint32_t mask = 0xff000000;
static constexpr uint32_t pattern = 0xd4000000;
DEFINE_STATIC_FORMAT(A64OpcodeExceptionGeneration, thisObj);
const char* format();
unsigned opc() { return (m_opcode>>21) & 0x7; }
unsigned op2() { return (m_opcode>>2) & 0x7; }
unsigned ll() { return m_opcode & 0x3; }
unsigned immediate16() { return (static_cast<unsigned>((m_opcode >> 5) & 0xffff) << 16) >> 16; }
};
class A64DOpcodeExtract : public A64DOpcode {
public:
static constexpr uint32_t mask = 0x1f800000;
static constexpr uint32_t pattern = 0x13800000;
DEFINE_STATIC_FORMAT(A64DOpcodeExtract, thisObj);
const char* format();
unsigned op21() { return (m_opcode >> 29) & 0x3; }
unsigned nBit() { return (m_opcode >> 22) & 0x1; }
unsigned o0Bit() { return (m_opcode >> 21) & 0x1; }
unsigned immediateS() { return (m_opcode >> 10) & 0x3f; }
};
class A64DOpcodeFloatingPointOps : public A64DOpcode {
public:
unsigned mBit() { return (m_opcode >> 31) & 0x1; }
unsigned sBit() { return (m_opcode >> 29) & 0x1; }
unsigned type() { return (m_opcode >> 22) & 0x3; }
};
class A64DOpcodeFloatingPointCompare : public A64DOpcodeFloatingPointOps {
private:
static const char* const s_opNames[16];
public:
static constexpr uint32_t mask = 0x5f203c00;
static constexpr uint32_t pattern = 0x1e202000;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingPointCompare, thisObj);
const char* format();
const char* opName() { return (opNum() & 0x2) ? "fcmpe" : "fcmp"; }
unsigned op() { return (m_opcode >> 14) & 0x3; }
unsigned opCode2() { return m_opcode & 0x1f; }
unsigned opNum() { return (m_opcode >> 3) & 0x3; }
};
class A64DOpcodeFloatingPointConditionalSelect : public A64DOpcodeFloatingPointOps {
public:
static constexpr uint32_t mask = 0x5f200c00;
static constexpr uint32_t pattern = 0x1e200c00;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingPointConditionalSelect, thisObj);
const char* format();
const char* opName() { return "fcsel"; }
unsigned condition() { return (m_opcode >> 12) & 0xf; }
};
class A64DOpcodeFloatingPointDataProcessing1Source : public A64DOpcodeFloatingPointOps {
private:
static const char* const s_opNames[16];
public:
static constexpr uint32_t mask = 0x5f207c00;
static constexpr uint32_t pattern = 0x1e204000;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingPointDataProcessing1Source, thisObj);
const char* format();
const char* opName() { return s_opNames[opNum()]; }
unsigned opNum() { return (m_opcode >> 15) & 0x3f; }
};
class A64DOpcodeFloatingPointDataProcessing2Source : public A64DOpcodeFloatingPointOps {
private:
static const char* const s_opNames[16];
public:
static constexpr uint32_t mask = 0x5f200800;
static constexpr uint32_t pattern = 0x1e200800;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingPointDataProcessing2Source, thisObj);
const char* format();
const char* opName() { return s_opNames[opNum()]; }
unsigned opNum() { return (m_opcode >> 12) & 0xf; }
};
class A64DOpcodeFloatingFixedPointConversions : public A64DOpcodeFloatingPointOps {
private:
static const char* const s_opNames[4];
public:
static constexpr uint32_t mask = 0x5f200000;
static constexpr uint32_t pattern = 0x1e000000;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingFixedPointConversions, thisObj);
const char* format();
const char* opName() { return s_opNames[opNum()]; }
unsigned rmode() { return (m_opcode >> 19) & 0x3; }
unsigned opcode() { return (m_opcode >> 16) & 0x7; }
unsigned scale() { return (m_opcode >> 10) & 0x3f; }
unsigned opNum() { return (m_opcode >> 16) & 0x3; }
};
class A64DOpcodeFloatingPointIntegerConversions : public A64DOpcodeFloatingPointOps {
private:
static const char* const s_opNames[32];
public:
static constexpr uint32_t mask = 0x5f20fc00;
static constexpr uint32_t pattern = 0x1e200000;
DEFINE_STATIC_FORMAT(A64DOpcodeFloatingPointIntegerConversions, thisObj);
const char* format();
const char* opName() { return s_opNames[opNum()]; }
unsigned rmode() { return (m_opcode >> 19) & 0x3; }
unsigned opcode() { return (m_opcode >> 16) & 0x7; }
unsigned opNum() { return (m_opcode >> 16) & 0x1f; }
};
class A64DOpcodeSystem : public A64DOpcode {
public:
unsigned lBit() { return (m_opcode >> 21) & 0x1; }
unsigned op0() { return (m_opcode >> 19) & 0x3; }
unsigned op1() { return (m_opcode >> 16) & 0x7; }
unsigned crN() { return (m_opcode >> 12) & 0xf; }
unsigned crM() { return (m_opcode >> 8) & 0xf; }
unsigned op2() { return (m_opcode >> 5) & 0x7; }
};
class A64DOpcodeMSRImmediate : public A64DOpcodeSystem {
public:
static constexpr uint32_t mask = 0xfff8f01f;
static constexpr uint32_t pattern = 0xd500401f;
DEFINE_STATIC_FORMAT(A64DOpcodeMSRImmediate, thisObj);
const char* format();
};
class A64DOpcodeMSROrMRSRegister : public A64DOpcodeSystem {
public:
static constexpr uint32_t mask = 0xffd00000;
static constexpr uint32_t pattern = 0xd5100000;
DEFINE_STATIC_FORMAT(A64DOpcodeMSROrMRSRegister, thisObj);
const char* format();
const char* opName() { return lBit() ? "mrs" : "msr"; }
unsigned systemRegister() { return ((op0() << 14) | (op1() << 11) | (crN() << 7) | (crM() << 3) | op2()); }
};
class A64DOpcodeHint : public A64DOpcodeSystem {
private:
static const char* const s_opNames[32];
public:
static constexpr uint32_t mask = 0xfffff01f;
static constexpr uint32_t pattern = 0xd503201f;
DEFINE_STATIC_FORMAT(A64DOpcodeHint, thisObj);
const char* format();
const char* opName();
unsigned immediate7() { return (m_opcode >> 5) & 0x7f; }
};
class A64DOpcodeSystemSync : public A64DOpcodeSystem {
static const char* const s_opNames[8];
static const char* const s_optionNames[16];
public:
static constexpr uint32_t mask = 0xfffff01f;
static constexpr uint32_t pattern = 0xd503301f;
DEFINE_STATIC_FORMAT(A64DOpcodeSystemSync, thisObj);
const char* format();
const char* opName() { return s_opNames[op2()]; }
const char* option() { return s_optionNames[crM()]; }
};
class A64DOpcodeLoadStore : public A64DOpcode {
private:
static const char* const s_opNames[32];
protected:
const char* opName()
{
return s_opNames[opNumber()];
}
unsigned size() { return (m_opcode >> 30) & 0x3; }
unsigned vBit() { return (m_opcode >> 26) & 0x1; }
unsigned opc() { return (m_opcode >> 22) & 0x3; }
unsigned opNumber() { return (size() <<3 ) | (vBit() << 2) | opc(); }
bool is64BitRT() { return ((opNumber() & 0x17) == 0x02) || ((opNumber() & 0x1e) == 0x18); }
};
class A64DOpcodeLoadStoreExclusive : public A64DOpcodeLoadStore {
private:
static const char* const s_opNames[64];
public:
static constexpr uint32_t mask = 0x3f000000;
static constexpr uint32_t pattern = 0x08000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreExclusive, thisObj);
const char* format();
const char* opName()
{
return s_opNames[opNumber()];
}
unsigned rs() { return rm(); }
unsigned rt2() { return (m_opcode >> 10) & 0x1f; }
unsigned o0() { return (m_opcode >> 15) & 0x1; }
unsigned o1() { return (m_opcode >> 21) & 0x1; }
unsigned o2() { return (m_opcode >> 23) & 0x1; }
unsigned loadBit() { return (m_opcode >> 22) & 0x1; }
unsigned opNumber() { return (size() << 4 ) | (o2() << 3) | (loadBit() << 2) | (o1() << 1) | o0(); }
bool isPairOp() { return (size() & 0x10) && o1(); }
};
class A64DOpcodeLoadStoreImmediate : public A64DOpcodeLoadStore {
private:
static const char* const s_unprivilegedOpNames[32];
static const char* const s_unscaledOpNames[32];
public:
static constexpr uint32_t mask = 0x3b200000;
static constexpr uint32_t pattern = 0x38000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreImmediate, thisObj);
const char* format();
const char* unprivilegedOpName()
{
return s_unprivilegedOpNames[opNumber()];
}
const char* unscaledOpName()
{
return s_unscaledOpNames[opNumber()];
}
unsigned type() { return (m_opcode >> 10) & 0x3; }
int immediate9() { return (static_cast<int>((m_opcode >> 12) & 0x1ff) << 23) >> 23; }
};
class A64DOpcodeLoadStoreRegisterOffset : public A64DOpcodeLoadStore {
public:
static constexpr uint32_t mask = 0x3b200c00;
static constexpr uint32_t pattern = 0x38200800;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreRegisterOffset, thisObj);
const char* format();
unsigned option() { return (m_opcode >> 13) & 0x7; }
int sBit() { return (m_opcode >> 12) & 0x1; }
};
class A64DOpcodeLoadStoreAuthenticated : public A64DOpcodeLoadStore {
private:
static const char* const s_opNames[2];
protected:
const char* opName()
{
return s_opNames[opNumber()];
}
public:
static constexpr uint32_t mask = 0xff200400;
static constexpr uint32_t pattern = 0xf8200400;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreAuthenticated, thisObj);
const char* format();
unsigned opNum() { return mBit(); }
unsigned mBit() { return (m_opcode >> 23) & 0x1; }
unsigned sBit() { return (m_opcode >> 22) & 0x1; }
unsigned wBit() { return (m_opcode >> 11) & 0x1; }
int immediate10() { return (sBit() << 9) | ((m_opcode >> 12) & 0x1ff); }
};
class A64DOpcodeLoadAtomic : public A64DOpcodeLoadStore {
private:
static const char* const s_opNames[64];
protected:
const char* opName()
{
unsigned number = opNumber();
if (number < 64)
return s_opNames[number];
return nullptr;
}
public:
static constexpr uint32_t mask = 0b00111111'00100000'10001100'00000000U;
static constexpr uint32_t pattern = 0b00111000'00100000'00000000'00000000U;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadAtomic, thisObj);
const char* format();
unsigned rs() { return rm(); }
unsigned opc() { return (m_opcode >> 12) & 0b111; }
unsigned ar() { return (m_opcode >> 22) & 0b11; }
unsigned opNumber() { return (opc() << 4) | (size() << 2) | ar(); }
};
class A64DOpcodeSwapAtomic : public A64DOpcodeLoadStore {
private:
static const char* const s_opNames[16];
protected:
const char* opName()
{
return s_opNames[opNumber()];
}
public:
static constexpr uint32_t mask = 0b00111111'00100000'11111100'00000000U;
static constexpr uint32_t pattern = 0b00111000'00100000'10000000'00000000U;
DEFINE_STATIC_FORMAT(A64DOpcodeSwapAtomic, thisObj);
const char* format();
unsigned rs() { return rm(); }
unsigned ar() { return (m_opcode >> 22) & 0b11; }
unsigned opNumber() { return (size() << 2) | ar(); }
};
class A64DOpcodeCAS : public A64DOpcodeLoadStore {
private:
static const char* const s_opNames[16];
protected:
const char* opName()
{
return s_opNames[opNumber()];
}
public:
static constexpr uint32_t mask = 0b00111111'10100000'01111100'00000000U;
static constexpr uint32_t pattern = 0b00001000'10100000'01111100'00000000U;
DEFINE_STATIC_FORMAT(A64DOpcodeCAS, thisObj);
const char* format();
unsigned rs() { return rm(); }
unsigned o1() { return (m_opcode >> 15) & 0x1; }
unsigned l() { return (m_opcode >> 22) & 0x1; }
unsigned opNumber() { return (size() << 2) | (l() << 1) | o1(); }
};
class A64DOpcodeLoadStoreRegisterPair : public A64DOpcodeLoadStore {
public:
static constexpr uint32_t mask = 0x38000000;
static constexpr uint32_t pattern = 0x28000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreRegisterPair, thisObj);
const char* format();
const char* opName();
unsigned rt2() { return (m_opcode >> 10) & 0x1f; }
int immediate7() { return (static_cast<int>((m_opcode >> 15) & 0x7f) << 25) >> 25; }
unsigned offsetMode() { return (m_opcode >> 23) & 0x7; }
int lBit() { return (m_opcode >> 22) & 0x1; }
};
class A64DOpcodeLoadStoreUnsignedImmediate : public A64DOpcodeLoadStore {
public:
static constexpr uint32_t mask = 0x3b000000;
static constexpr uint32_t pattern = 0x39000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLoadStoreUnsignedImmediate, thisObj);
const char* format();
unsigned immediate12() { return (m_opcode >> 10) & 0xfff; }
};
class A64DOpcodeLogical : public A64DOpcode {
private:
static const char* const s_opNames[8];
public:
const char* opName(unsigned opNumber)
{
return s_opNames[opNumber & 0x7];
}
unsigned opc() { return (m_opcode >> 29) & 0x3; }
unsigned nBit() { return (m_opcode >> 21) & 0x1; }
};
class A64DOpcodeLogicalImmediate : public A64DOpcodeLogical {
public:
static constexpr uint32_t mask = 0x1f800000;
static constexpr uint32_t pattern = 0x12000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLogicalImmediate, thisObj);
const char* format();
bool isTst() { return ((opNumber() == 6) && (rd() == 31)); }
bool isMov() { return ((opNumber() == 2) && (rn() == 31)); }
unsigned opNumber() { return opc() << 1; }
unsigned nBit() { return (m_opcode >> 22) & 0x1; }
unsigned immediateR() { return (m_opcode >> 16) & 0x3f; }
unsigned immediateS() { return (m_opcode >> 10) & 0x3f; }
};
class A64DOpcodeLogicalShiftedRegister : public A64DOpcodeLogical {
public:
static constexpr uint32_t mask = 0x1f000000;
static constexpr uint32_t pattern = 0x0a000000;
DEFINE_STATIC_FORMAT(A64DOpcodeLogicalShiftedRegister, thisObj);
const char* format();
bool isTst() { return ((opNumber() == 6) && (rd() == 31)); }
bool isMov() { return ((opc() == 1) && (rn() == 31)); }
unsigned opNumber() { return (opc() << 1) | nBit(); }
unsigned shift() { return (m_opcode >> 22) & 0x3; }
int immediate6() { return (static_cast<uint32_t>((m_opcode >> 10) & 0x3f) << 26) >> 26; }
};
class A64DOpcodeMoveWide : public A64DOpcode {
private:
static const char* const s_opNames[4];
public:
static constexpr uint32_t mask = 0x1f800000;
static constexpr uint32_t pattern = 0x12800000;
DEFINE_STATIC_FORMAT(A64DOpcodeMoveWide, thisObj);
const char* format();
const char* opName() { return s_opNames[opc()]; }
unsigned opc() { return (m_opcode >> 29) & 0x3; }
unsigned hw() { return (m_opcode >> 21) & 0x3; }
unsigned immediate16() { return (m_opcode >> 5) & 0xffff; }
};
class A64DOpcodeTestAndBranchImmediate : public A64DOpcode {
public:
static constexpr uint32_t mask = 0x7e000000;
static constexpr uint32_t pattern = 0x36000000;
DEFINE_STATIC_FORMAT(A64DOpcodeTestAndBranchImmediate, thisObj);
const char* format();
unsigned bitNumber() { return ((m_opcode >> 26) & 0x20) | ((m_opcode >> 19) & 0x1f); }
unsigned opBit() { return (m_opcode >> 24) & 0x1; }
int immediate14() { return (static_cast<int>((m_opcode >> 5) & 0x3fff) << 18) >> 18; }
};
class A64DOpcodeUnconditionalBranchImmediate : public A64DOpcode {
public:
static constexpr uint32_t mask = 0x7c000000;
static constexpr uint32_t pattern = 0x14000000;
DEFINE_STATIC_FORMAT(A64DOpcodeUnconditionalBranchImmediate, thisObj);
const char* format();
unsigned op() { return (m_opcode >> 31) & 0x1; }
int immediate26() { return (static_cast<int>(m_opcode & 0x3ffffff) << 6) >> 6; }
};
class A64DOpcodeUnconditionalBranchRegister : public A64DOpcode {
private:
static const char* const s_opNames[8];
static const char* const s_AuthOpNames[20];
public:
static constexpr uint32_t mask = 0xfe1f0000;
static constexpr uint32_t pattern = 0xd61f0000;
DEFINE_STATIC_FORMAT(A64DOpcodeUnconditionalBranchRegister, thisObj);
const char* format();
const char* opName() { return s_opNames[opc()]; }
const char* authOpName();
unsigned opc() { return (m_opcode >> 21) & 0xf; }
unsigned authOpCode() {return (opc() << 1) | mBit(); }
unsigned op2() { return (m_opcode >> 16) & 0x1f; }
unsigned op3() { return (m_opcode >> 10) & 0x3f; }
unsigned op4() { return m_opcode & 0xf; }
unsigned mBit() { return (m_opcode >> 10) & 1; }
unsigned rm() { return rd(); }
};
} } // namespace JSC::ARM64Disassembler
using JSC::ARM64Disassembler::A64DOpcode;