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How to use byte method of x86 Package

Best Syzkaller code snippet using x86.byte

cpu_x86.go

Source:cpu_x86.go

...106func Name() string {107	if maxExtendedFunctionInformation < 0x80000004 {108		return ""109	}110	data := make([]byte, 0, 3*4*4)111	var eax, ebx, ecx, edx uint32112	eax, ebx, ecx, edx = cpuid(0x80000002, 0)113	data = appendBytes(data, eax, ebx, ecx, edx)114	eax, ebx, ecx, edx = cpuid(0x80000003, 0)115	data = appendBytes(data, eax, ebx, ecx, edx)116	eax, ebx, ecx, edx = cpuid(0x80000004, 0)117	data = appendBytes(data, eax, ebx, ecx, edx)118	// Trim leading spaces.119	for len(data) > 0 && data[0] == ' ' {120		data = data[1:]121	}122	// Trim tail after and including the first null byte.123	for i, c := range data {124		if c == '\x00' {125			data = data[:i]126			break127		}128	}129	return string(data)130}131func appendBytes(b []byte, args ...uint32) []byte {132	for _, arg := range args {133		b = append(b,134			byte((arg >> 0)),135			byte((arg >> 8)),136			byte((arg >> 16)),137			byte((arg >> 24)))138	}139	return b140}...

assembler.go

Source:assembler.go

...7	"turtlego/src/pcode"8)9// Functions that will create code for different instruction sets.10// Returns code, data, and patches11type AssemblerFn func(pcode.Instruction) ([]byte, []byte, []backpatch.BackPatch)12type Assembler struct {13	outputFile string14	code       []byte15	data       []byte16	pcodeAddressToRealAddress map[int]int17	backPatches               []backpatch.BackPatch18	output []byte19	pcodeX86map map[byte]AssemblerFn20	exitFnsMap  map[byte]func() []byte21	pcode *pcode.Program22}23const (24	X86_64 byte = iota25)26func NewAssembler(pc *pcode.Program) *Assembler {27	a := &Assembler{}28	a.pcode = pc29	a.code = []byte{}30	a.data = []byte{}31	a.output = []byte{}32	a.pcodeAddressToRealAddress = make(map[int]int)33	a.pcodeX86map = map[byte]AssemblerFn{34		pcode.LOADINT:             x86_64.MovRegImm,35		pcode.MOV_REG_REG:         x86_64.MovRegReg,36		pcode.MOV_REG_ADDRESS_REG: x86_64.MovRegInAddrFromReg,37		pcode.MOV_REG_REG_ADDRESS: x86_64.MovRegFromRegInAddr,38		pcode.ADD_REG_INT_INT:     x86_64.AddImmReg,39		pcode.ADD_REG_REG_INT:     x86_64.AddRegReg,40		pcode.SUB_REG_INT_INT:     x86_64.SubImmReg,41		pcode.SUB_REG_REG_INT:     x86_64.SubRegReg,42		pcode.MUL_REG_INT_INT:     x86_64.MulImmReg,43		pcode.PUSH_REG:            x86_64.PushReg,44		pcode.POP:                 x86_64.PopReg,45		pcode.BUILTIN_CALL:        x86_64.Builtin,46		pcode.PUSH_INT:            x86_64.PushInt,47		pcode.CMP_REG_INT:         x86_64.CmpRegInt,48		pcode.JMP:                 x86_64.Jump,49		pcode.JNZ:                 x86_64.JumpIfNotZero,50		pcode.JMZ:                 x86_64.JumpIfZero,51		pcode.NOP:                 x86_64.Nop,52		pcode.MUL_REG_REG_INT:     x86_64.MulRegReg,53		pcode.DIV_REG_REG_INT:     x86_64.DivRegReg,54		pcode.DIV_REG_INT_INT:     x86_64.DivImmReg,55		pcode.BOOL_OR_REG_IMM:     x86_64.OrRegImm,56		pcode.BOOL_OR_REG_REG:     x86_64.OrRegReg,57		pcode.BOOL_AND_REG_REG:    x86_64.AndRegReg,58		pcode.BOOL_AND_REG_IMM:    x86_64.AndRegImm,59		//These functions are all generated using a higher-order function60		//The function that creates these functions returns a compatiable61		//type with AssemblerFn, but it must be converted here to be in the map62		pcode.EQ_REG_REG: AssemblerFn(x86_64.EqRegReg),63		pcode.EQ_REG_IMM: AssemblerFn(x86_64.EqRegImm),64		pcode.NE_REG_IMM: AssemblerFn(x86_64.NeRegImm),65		pcode.NE_REG_REG: AssemblerFn(x86_64.NeRegReg),66		pcode.LT_REG_IMM: AssemblerFn(x86_64.LtRegImm),67		pcode.LT_REG_REG: AssemblerFn(x86_64.LtRegReg),68		pcode.LE_REG_IMM: AssemblerFn(x86_64.LeRegImm),69		pcode.LE_REG_REG: AssemblerFn(x86_64.LeRegReg),70		pcode.GE_REG_IMM: AssemblerFn(x86_64.GeRegImm),71		pcode.GE_REG_REG: AssemblerFn(x86_64.GeRegReg),72		pcode.GT_REG_IMM: AssemblerFn(x86_64.GtRegImm),73		pcode.GT_REG_REG: AssemblerFn(x86_64.GtRegReg),74		pcode.MK_HEAP: x86_64.MkHeap,75		pcode.ALLOC:   x86_64.Alloc,76	}77	a.exitFnsMap = map[byte]func() []byte{78		X86_64: x86_64.ExitX86,79	}80	return a81}82func (a *Assembler) Assemble(instructionSet byte) {83	for pcodeAddress, instruction := range a.pcode.Instructions {84		fn, ok := a.pcodeX86map[instruction.Opcode] //TODO: Expand for other architectures85		if !ok {86			a.raiseError("Generation", "x86 code generation at: "+pcode.InstructionMnemonicMap[instruction.Opcode])87		}88		newCode, newData, backpatches := fn(*instruction)89		a.pcodeAddressToRealAddress[pcodeAddress] = len(a.code)90		//fmt.Printf("%d %x\n", pcodeAddress, 0x400000+len(a.code)+0x40+(2*0x38))91		for _, patch := range backpatches {92			patch.LocationOfAddressToPatch += len(a.code)93			patch.LocationOfInstructionPatched += len(a.code)94			a.backPatches = append(a.backPatches, patch)95		}96		a.code = append(a.code, newCode...)...

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