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How to use mov8 method of x86 Package

Best Syzkaller code snippet using x86.mov8

pseudo.go

Source:pseudo.go

...323	default:324		panic("bad mode")325	}326}327func (gen *generator) mov8(reg int, v uint8) {328	switch reg {329	case regAL:330		gen.byte(0xb0)331	case regCL:332		gen.byte(0xb1)333	case regDL:334		gen.byte(0xb2)335	default:336		panic("unknown register")337	}338	gen.byte(v)339}340func (gen *generator) mov16(reg int, v uint16) {341	gen.operand16()342	switch reg {343	case regAX:344		gen.byte(0xb8)345	case regCX:346		gen.byte(0xb9)347	case regDX:348		gen.byte(0xba)349	default:350		panic("unknown register")351	}352	gen.imm16(v)353}354func (gen *generator) mov32(reg int, v uint32) {355	gen.operand32()356	switch reg {357	case regEAX:358		gen.byte(0xb8)359	case regECX:360		gen.byte(0xb9)361	case regEDX:362		gen.byte(0xba)363	default:364		panic("unknown register")365	}366	gen.imm32(v)367}368func (gen *generator) mov64(reg int, v uint64) {369	if gen.mode != iset.ModeLong64 {370		panic("bad mode")371	}372	gen.byte(0x48)373	switch reg {374	case regRAX:375		gen.byte(0xb8)376	case regRCX:377		gen.byte(0xb9)378	case regRDX:379		gen.byte(0xba)380	default:381		panic("unknown register")382	}383	gen.imm64(v)384}385// movl $v, off(%rsp).386func (gen *generator) mov32toSPaddr(v uint32, off uint8) {387	gen.addr32()388	gen.operand32()389	gen.byte(0xc7, 0x44, 0x24, off)390	gen.imm32(v)391}392func (gen *generator) xor32(reg int, v uint32) {393	gen.operand32()394	switch reg {395	case regEAX:396		gen.byte(0x35)397	default:398		panic("unknown register")399	}400	gen.imm32(v)401}402func (gen *generator) readCR(cr uint8) {403	if cr < 8 {404		// MOV %crN, %eax/%rax405		gen.byte(0x0f, 0x20, 0xc0|cr<<3)406	} else if cr < 16 {407		// MOV %crN, %eax/%rax408		gen.byte(0x44, 0x0f, 0x20, 0xc0|(cr-8)<<3)409	} else {410		panic("bad cr")411	}412}413func (gen *generator) writeCR(cr uint8) {414	if cr < 8 {415		// MOV %eax/%rax, %crN416		gen.byte(0x0f, 0x22, 0xc0|cr<<3)417	} else if cr < 16 {418		// MOV %eax/%rax, %crN419		gen.byte(0x44, 0x0f, 0x22, 0xc0|(cr-8)<<3)420	} else {421		panic("bad cr")422	}423}424func (gen *generator) readDR(dr uint8) {425	if dr >= 8 {426		panic("bad dr")427	}428	// MOV %drN, %eax/%rax429	gen.byte(0x0f, 0x21, 0xc0|dr<<3)430}431func (gen *generator) writeDR(dr uint8) {432	if dr >= 8 {433		panic("bad dr")434	}435	// MOV %eax/%rax, %drN436	gen.byte(0x0f, 0x23, 0xc0|dr<<3)437}438func (gen *generator) in8(port uint16) {439	gen.mov16(regDX, port)440	gen.byte(0xec) // in %al, %dx441}442func (gen *generator) in16(port uint16) {443	gen.mov16(regDX, port)444	gen.operand16()445	gen.byte(0xed) // in %ax, %dx446}447func (gen *generator) in32(port uint16) {448	gen.mov16(regDX, port)449	gen.operand32()450	gen.byte(0xed) // in %eax, %dx451}452func (gen *generator) in(port uint16, size int) {453	switch size {454	case 0:455		gen.in8(port)456	case 1:457		gen.in16(port)458	case 2:459		gen.in32(port)460	default:461		panic("bad size")462	}463}464func (gen *generator) out8(port uint16, v uint8) {465	gen.mov16(regDX, port)466	gen.mov8(regAL, v)467	gen.byte(0xee) // out %dx, %al468}469func (gen *generator) out16(port, v uint16) {470	gen.mov16(regDX, port)471	gen.mov16(regAX, v)472	gen.operand16()473	gen.byte(0xef) // out %dx, %ax474}475func (gen *generator) out32(port uint16, v uint32) {476	gen.mov16(regDX, port)477	gen.mov32(regEAX, v)478	gen.operand32()479	gen.byte(0xef) // out %dx, %eax480}...

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