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How to use readDR method of x86 Package
Best Syzkaller code snippet using x86.readDR
pseudo.go
Source:pseudo.go 
...139 } else {140 gen.mov32(regEAX, uint32(addr))141 }142 gen.writeDR(br)143 gen.readDR(7)144 gen.xor32(regEAX, loc<<(br*2)|typ<<(16+br*4))145 gen.writeDR(7)146 return gen.text147 },148 },149 {150 Name: "PSEUDO_LOAD_SEG",151 Mode: 1<<iset.ModeLast - 1,152 Priv: true,153 Pseudo: true,154 generator: func(cfg *iset.Config, r *rand.Rand) []byte {155 gen := makeGen(cfg, r)156 sel := randSelector(r)157 if cfg.Mode == iset.ModeReal16 {158 sel = uint16(iset.GenerateInt(cfg, r, 8)) >> 4159 }160 reg := uint8(r.Intn(6))161 gen.mov16(regAX, sel)162 gen.byte(0x8e, 0xc0|(reg<<3)) // MOV %ax, %seg163 return gen.text164 },165 },166 {167 Name: "PSEUDO_FAR_JMP",168 Mode: 1<<iset.ModeLong64 | 1<<iset.ModeProt32 | 1<<iset.ModeProt16,169 Priv: true,170 Pseudo: true,171 generator: func(cfg *iset.Config, r *rand.Rand) []byte {172 gen := makeGen(cfg, r)173 sel := randSelector(r)174 off := iset.GenerateInt(cfg, r, 4)175 if cfg.Mode == iset.ModeLong64 {176 gen.mov32toSPaddr(uint32(sel), 0)177 gen.mov32toSPaddr(uint32(off), 2)178 if r.Intn(2) == 0 {179 gen.byte(0xff, 0x2c, 0x24) // ljmp (%rsp)180 } else {181 gen.byte(0xff, 0x1c, 0x24) // lcall (%rsp)182 }183 } else {184 if r.Intn(2) == 0 {185 gen.byte(0xea) // ljmp $imm16, $imm16/32186 } else {187 gen.byte(0x9a) // lcall $imm16, $imm16/32188 }189 if cfg.Mode == iset.ModeProt16 {190 gen.imm16(uint16(off))191 } else {192 gen.imm32(uint32(off))193 }194 gen.imm16(sel)195 }196 return gen.text197 },198 },199 {200 Name: "PSEUDO_LTR_LLDT",201 Mode: 1<<iset.ModeLong64 | 1<<iset.ModeProt32 | 1<<iset.ModeProt16,202 Priv: true,203 Pseudo: true,204 generator: func(cfg *iset.Config, r *rand.Rand) []byte {205 gen := makeGen(cfg, r)206 sel := randSelector(r)207 gen.mov16(regAX, sel)208 if r.Intn(2) == 0 {209 gen.byte(0x0f, 0x00, 0xd8) // ltr %ax210 } else {211 gen.byte(0x0f, 0x00, 0xd0) // lldt %ax212 }213 return gen.text214 },215 },216 {217 Name: "PSEUDO_LGIDT",218 Mode: 1<<iset.ModeLong64 | 1<<iset.ModeProt32 | 1<<iset.ModeProt16,219 Priv: true,220 Pseudo: true,221 generator: func(cfg *iset.Config, r *rand.Rand) []byte {222 gen := makeGen(cfg, r)223 limit := uint32(iset.GenerateInt(cfg, r, 2))224 base := uint32(iset.GenerateInt(cfg, r, 4))225 gen.mov32toSPaddr(limit, 0)226 gen.mov32toSPaddr(base, 2)227 gen.mov32toSPaddr(0, 6)228 gen.addr32()229 if r.Intn(2) == 0 {230 gen.byte(0x0f, 0x01, 0x14, 0x24) // lgdt (%rsp)231 } else {232 gen.byte(0x0f, 0x01, 0x1c, 0x24) // lidt (%rsp)233 }234 return gen.text235 },236 },237 {238 Name: "PSEUDO_HYPERCALL",239 Mode: 1<<iset.ModeLong64 | 1<<iset.ModeProt32 | 1<<iset.ModeProt16,240 Priv: true,241 Pseudo: true,242 generator: func(cfg *iset.Config, r *rand.Rand) []byte {243 gen := makeGen(cfg, r)244 switch r.Intn(2) {245 case 0:246 gen.mov32(regEAX, 1) // KVM_HC_VAPIC_POLL_IRQ247 case 1:248 gen.mov32(regEAX, 5) // KVM_HC_KICK_CPU249 gen.mov32(regECX, uint32(iset.GenerateInt(cfg, r, 4))) // APIC ID250 default:251 panic("bad")252 }253 if r.Intn(2) == 0 {254 gen.byte(0x0f, 0x01, 0xd9) // vmmcall255 } else {256 gen.byte(0x0f, 0x01, 0xc1) // vmcall257 }258 return gen.text259 },260 },261}262const (263 regAL = iota264 regAX265 regEAX266 regRAX267 regCL268 regCX269 regECX270 regRCX271 regDL272 regDX273 regEDX274 regRDX275)276type generator struct {277 mode iset.Mode278 r *rand.Rand279 text []byte280}281func makeGen(cfg *iset.Config, r *rand.Rand) *generator {282 return &generator{283 mode: cfg.Mode,284 r: r,285 }286}287func (gen *generator) byte(v ...uint8) {288 gen.text = append(gen.text, v...)289}290func (gen *generator) imm16(v uint16) {291 gen.byte(byte(v>>0), byte(v>>8))292}293func (gen *generator) imm32(v uint32) {294 gen.byte(byte(v>>0), byte(v>>8), byte(v>>16), byte(v>>24))295}296func (gen *generator) imm64(v uint64) {297 gen.byte(byte(v>>0), byte(v>>8), byte(v>>16), byte(v>>24),298 byte(v>>32), byte(v>>40), byte(v>>48), byte(v>>56))299}300func (gen *generator) operand16() {301 switch gen.mode {302 case iset.ModeLong64, iset.ModeProt32:303 gen.byte(0x66)304 case iset.ModeProt16, iset.ModeReal16:305 default:306 panic("bad mode")307 }308}309func (gen *generator) operand32() {310 switch gen.mode {311 case iset.ModeLong64, iset.ModeProt32:312 case iset.ModeProt16, iset.ModeReal16:313 gen.byte(0x66)314 default:315 panic("bad mode")316 }317}318func (gen *generator) addr32() {319 switch gen.mode {320 case iset.ModeLong64, iset.ModeProt32:321 case iset.ModeProt16, iset.ModeReal16:322 gen.byte(0x67)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) {...
readDR
Using AI Code Generation
1x86 = new x86();2x86.readDR(0);3x86 = new x86();4x86.readDR(0);5x86 = new x86();6x86.readDR(0);7x86 = new x86();8x86.readDR(0);9x86 = new x86();10x86.readDR(0);11x86 = new x86();12x86.readDR(0);13x86 = new x86();14x86.readDR(0);15x86 = new x86();16x86.readDR(0);17x86 = new x86();18x86.readDR(0);19x86 = new x86();20x86.readDR(0);21x86 = new x86();22x86.readDR(0);23x86 = new x86();24x86.readDR(0);25x86 = new x86();26x86.readDR(0);27x86 = new x86();28x86.readDR(0);29x86 = new x86();30x86.readDR(0);
readDR
Using AI Code Generation
1x86 x = new x86();2x.readDR();3x64 x = new x64();4x.readDR();5x86_64 x = new x86_64();6x.readDR();7x86_32 x = new x86_32();8x.readDR();
readDR
Using AI Code Generation
1import "fmt"2func main() {3 obj.readDR(0)4}5import "fmt"6func main() {7 obj.readDR(0)8}9import "fmt"10func main() {11 obj.readDR(0)12}13import "fmt"14func main() {15 obj.readDR(0)16}17import "fmt"18func main() {19 obj.readDR(0)20}21import "fmt"22func main() {23 obj.readDR(0)24}25import "fmt"26func main() {27 obj.readDR(0)28}29import "fmt"30func main() {31 obj.readDR(0)32}33import "fmt"34func main() {35 obj.readDR(0)36}37import "fmt"38func main() {39 obj.readDR(0)40}41import "fmt"42func main() {43 obj.readDR(0)44}45import "fmt"46func main() {
readDR
Using AI Code Generation
1import (2func main() {3 x := x86.NewX86()4 fmt.Println(x.ReadDR(0))5}6import (7func main() {8 x := x86.NewX86()9 x.WriteDR(0, 0x1234)10 fmt.Println(x.ReadDR(0))11}12import (13func main() {14 x := x86.NewX86()15 fmt.Println(x.ReadSegmentRegister(0))16}17import (18func main() {19 x := x86.NewX86()20 x.WriteSegmentRegister(0, 0x1234)21 fmt.Println(x.ReadSegmentRegister(0))22}23import (24func main() {25 x := x86.NewX86()26 fmt.Println(x.ReadCR(0))27}28import (29func main() {30 x := x86.NewX86()31 x.WriteCR(0, 0x1234)32 fmt.Println(x.ReadCR(0))33}34import (
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