Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use Encode method of x86 Package

Best Syzkaller code snippet using x86.Encode

x86_64.go

Source:x86_64.go

...8	"github.com/bspaans/jit-compiler/lib"9)10type X86_64 struct {11}12func (x *X86_64) EncodeExpression(expr IRExpression, ctx *IR_Context, target lib.Operand) ([]lib.Instruction, error) {13	return encodeExpression(expr, ctx, target)14}15func (x *X86_64) EncodeStatement(stmt IR, ctx *IR_Context) ([]lib.Instruction, error) {16	return encodeStatement(stmt, ctx)17}18func (x *X86_64) EncodeDataSection(stmts []IR, ctx *IR_Context) (*Segments, error) {19	segments := NewSegments()20	for _, stmt := range stmts {21		if err := encodeDataSection(stmt, ctx, segments); err != nil {22			return nil, err23		}24	}25	return segments, nil26}27func encodeExpression(e IRExpression, ctx *IR_Context, target lib.Operand) ([]lib.Instruction, error) {28	switch v := e.(type) {29	case *expr.IR_Add:30		return encode_IR_Add(v, ctx, target)31	case *expr.IR_And:32		return encode_IR_And(v, ctx, target)...

not.go

Source:not.go

1package x86_642import (3	"fmt"4	. "github.com/bspaans/jit-compiler/ir/shared"5	"github.com/bspaans/jit-compiler/asm/x86_64"6	"github.com/bspaans/jit-compiler/asm/x86_64/encoding"7	"github.com/bspaans/jit-compiler/ir/expr"8	"github.com/bspaans/jit-compiler/lib"9)10func encode_IR_Not(i *expr.IR_Not, ctx *IR_Context, target lib.Operand, includeSETE bool) ([]lib.Instruction, error) {11	var reg1 lib.Operand12	result := []lib.Instruction{}13	switch c := i.Op1.(type) {14	case *expr.IR_Variable:15		variable := c.Value16		reg1 = ctx.VariableMap[variable]17		if !includeSETE {18			cmp := x86_64.CMP_immediate(1, reg1)19			result = append(result, cmp)20			ctx.AddInstruction(cmp)21		}22	case *expr.IR_Bool:23		value := uint64(0)24		if c.Value {25			value = 126		}27		reg1 = ctx.AllocateRegister(TUint64)28		defer ctx.DeallocateRegister(reg1.(*encoding.Register))29		mov := x86_64.MOV_immediate(value, reg1)30		cmp := x86_64.CMP_immediate(1, reg1)31		result = append(result, mov, cmp)32		ctx.AddInstruction(mov, cmp)33	case *expr.IR_Equals:34		var err error35		var eq []lib.Instruction36		eq, err = encode_IR_Equals(c, ctx, target, includeSETE)37		if err != nil {38			return nil, err39		}40		for _, r := range eq {41			result = append(result, r)42		}43		reg1 = target44		// TODO: introduce logical operator interface45	case *expr.IR_LT:46		var err error47		var eq []lib.Instruction48		eq, err = encode_IR_LT(c, ctx, target, includeSETE)49		if err != nil {50			return nil, err51		}52		for _, r := range eq {53			result = append(result, r)54		}55		reg1 = target56		// TODO: introduce logical operator interface57	case *expr.IR_LTE:58		var err error59		var eq []lib.Instruction60		eq, err = encode_IR_LTE(c, ctx, target, includeSETE)61		if err != nil {62			return nil, err63		}64		for _, r := range eq {65			result = append(result, r)66		}67		reg1 = target68	case *expr.IR_GT:69		var err error70		var eq []lib.Instruction71		eq, err = encode_IR_GT(c, ctx, target, includeSETE)72		if err != nil {73			return nil, err74		}75		for _, r := range eq {76			result = append(result, r)77		}78		reg1 = target79		// TODO: introduce logical operator interface80	case *expr.IR_GTE:81		var err error82		var eq []lib.Instruction83		eq, err = encode_IR_GTE(c, ctx, target, includeSETE)84		if err != nil {85			return nil, err86		}87		for _, r := range eq {88			result = append(result, r)89		}90		reg1 = target91	case *expr.IR_And:92		var err error93		var eq []lib.Instruction94		eq, err = encode_IR_And(c, ctx, target)95		if err != nil {96			return nil, err97		}98		for _, r := range eq {99			result = append(result, r)100		}101		reg1 = target102	case *expr.IR_Or:103		var err error104		var eq []lib.Instruction105		eq, err = encode_IR_Or(c, ctx, target)106		if err != nil {107			return nil, err108		}109		for _, r := range eq {110			result = append(result, r)111		}112		reg1 = target113	default:114		return nil, fmt.Errorf("Unsupported ! operation: %s", i.Op1.Type())115	}116	if includeSETE {117		tmpReg := ctx.AllocateRegister(TUint64)118		defer ctx.DeallocateRegister(tmpReg)119		instr := []lib.Instruction{}120		// TODO: use test?121		instr = append(instr, x86_64.XOR(tmpReg, tmpReg))122		instr = append(instr, x86_64.CMP_immediate(0, reg1))123		instr = append(instr, x86_64.SETE(tmpReg.(*encoding.Register).Get8BitRegister()))124		instr = append(instr, x86_64.MOV(tmpReg.(*encoding.Register).ForOperandWidth(target.Width()), target))125		for _, inst := range instr {126			result = append(result, inst)127			ctx.AddInstruction(inst)128		}129	}130	return result, nil131}...

conditional_jump.go

Source:conditional_jump.go

1package x86_642import (3	"fmt"4	"github.com/bspaans/jit-compiler/asm/x86_64"5	"github.com/bspaans/jit-compiler/asm/x86_64/encoding"6	"github.com/bspaans/jit-compiler/ir/expr"7	. "github.com/bspaans/jit-compiler/ir/shared"8	"github.com/bspaans/jit-compiler/lib"9)10func conditionalJump(ctx *IR_Context, condition IRExpression, stmtLen int) ([]lib.Instruction, error) {11	jmpSize := 212	reg := ctx.AllocateRegister(TBool)13	defer ctx.DeallocateRegister(reg)14	var result []lib.Instruction15	var instr []lib.Instruction16	var err error17	switch condition.(type) {18	case *expr.IR_Equals:19		c := condition.(*expr.IR_Equals)20		result, err = encode_IR_Equals(c, ctx, reg, false)21		instr = []lib.Instruction{22			x86_64.JNE(encoding.Uint8(stmtLen + jmpSize)),23		}24	case *expr.IR_LT:25		c := condition.(*expr.IR_LT)26		result, err = encode_IR_LT(c, ctx, reg, false)27		if IsSignedInteger(c.Op1.ReturnType(ctx)) {28			instr = []lib.Instruction{29				x86_64.JNL(encoding.Uint8(stmtLen + jmpSize)),30			}31		} else {32			instr = []lib.Instruction{33				x86_64.JNB(encoding.Uint8(stmtLen + jmpSize)),34			}35		}36	case *expr.IR_LTE:37		c := condition.(*expr.IR_LTE)38		result, err = encode_IR_LTE(c, ctx, reg, false)39		if IsSignedInteger(c.Op1.ReturnType(ctx)) {40			instr = []lib.Instruction{41				x86_64.JNLE(encoding.Uint8(stmtLen + jmpSize)),42			}43		} else {44			instr = []lib.Instruction{45				x86_64.JNBE(encoding.Uint8(stmtLen + jmpSize)),46			}47		}48	case *expr.IR_GT:49		c := condition.(*expr.IR_GT)50		result, err = encode_IR_GT(c, ctx, reg, false)51		if IsSignedInteger(c.Op1.ReturnType(ctx)) {52			instr = []lib.Instruction{53				x86_64.JNG(encoding.Uint8(stmtLen + jmpSize)),54			}55		} else {56			instr = []lib.Instruction{57				x86_64.JNA(encoding.Uint8(stmtLen + jmpSize)),58			}59		}60	case *expr.IR_GTE:61		c := condition.(*expr.IR_GTE)62		result, err = encode_IR_GTE(c, ctx, reg, false)63		if IsSignedInteger(c.Op1.ReturnType(ctx)) {64			instr = []lib.Instruction{65				x86_64.JNGE(encoding.Uint8(stmtLen + jmpSize)),66			}67		} else {68			instr = []lib.Instruction{69				x86_64.JNAE(encoding.Uint8(stmtLen + jmpSize)),70			}71		}72	case *expr.IR_Not:73		result, err = encode_IR_Not(condition.(*expr.IR_Not), ctx, reg, false)74		instr = []lib.Instruction{75			x86_64.JE(encoding.Uint8(stmtLen + jmpSize)),76		}77	case *expr.IR_And:78		result, err = encode_IR_And(condition.(*expr.IR_And), ctx, reg)79		instr = []lib.Instruction{80			x86_64.JE(encoding.Uint8(stmtLen + jmpSize)),81		}82	case *expr.IR_Or:83		result, err = encode_IR_Or(condition.(*expr.IR_Or), ctx, reg)84		instr = []lib.Instruction{85			x86_64.JE(encoding.Uint8(stmtLen + jmpSize)),86		}87	case *expr.IR_Bool, *expr.IR_Variable:88		result, err = encodeExpression(condition, ctx, reg)89		instr = []lib.Instruction{90			x86_64.CMP_immediate(1, reg),91			x86_64.JNE(encoding.Uint8(stmtLen + jmpSize)),92		}93	default:94		return nil, fmt.Errorf("Unsupported condition %s (type: %v)", condition.String(), condition.Type())95	}96	if err != nil {97		return nil, err98	}99	for _, inst := range instr {100		ctx.AddInstruction(inst)101		result = append(result, inst)102	}103	return result, nil104}...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.