Integrate BACKBEAT SDK and resolve KACHING license validation
Major integrations and fixes: - Added BACKBEAT SDK integration for P2P operation timing - Implemented beat-aware status tracking for distributed operations - Added Docker secrets support for secure license management - Resolved KACHING license validation via HTTPS/TLS - Updated docker-compose configuration for clean stack deployment - Disabled rollback policies to prevent deployment failures - Added license credential storage (CHORUS-DEV-MULTI-001) Technical improvements: - BACKBEAT P2P operation tracking with phase management - Enhanced configuration system with file-based secrets - Improved error handling for license validation - Clean separation of KACHING and CHORUS deployment stacks 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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							| @@ -0,0 +1,726 @@ | ||||
| // Copyright 2016 The Go Authors. All rights reserved. | ||||
| // Use of this source code is governed by a BSD-style | ||||
| // license that can be found in the LICENSE file. | ||||
|  | ||||
| package bpf | ||||
|  | ||||
| import "fmt" | ||||
|  | ||||
| // An Instruction is one instruction executed by the BPF virtual | ||||
| // machine. | ||||
| type Instruction interface { | ||||
| 	// Assemble assembles the Instruction into a RawInstruction. | ||||
| 	Assemble() (RawInstruction, error) | ||||
| } | ||||
|  | ||||
| // A RawInstruction is a raw BPF virtual machine instruction. | ||||
| type RawInstruction struct { | ||||
| 	// Operation to execute. | ||||
| 	Op uint16 | ||||
| 	// For conditional jump instructions, the number of instructions | ||||
| 	// to skip if the condition is true/false. | ||||
| 	Jt uint8 | ||||
| 	Jf uint8 | ||||
| 	// Constant parameter. The meaning depends on the Op. | ||||
| 	K uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (ri RawInstruction) Assemble() (RawInstruction, error) { return ri, nil } | ||||
|  | ||||
| // Disassemble parses ri into an Instruction and returns it. If ri is | ||||
| // not recognized by this package, ri itself is returned. | ||||
| func (ri RawInstruction) Disassemble() Instruction { | ||||
| 	switch ri.Op & opMaskCls { | ||||
| 	case opClsLoadA, opClsLoadX: | ||||
| 		reg := Register(ri.Op & opMaskLoadDest) | ||||
| 		sz := 0 | ||||
| 		switch ri.Op & opMaskLoadWidth { | ||||
| 		case opLoadWidth4: | ||||
| 			sz = 4 | ||||
| 		case opLoadWidth2: | ||||
| 			sz = 2 | ||||
| 		case opLoadWidth1: | ||||
| 			sz = 1 | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
| 		switch ri.Op & opMaskLoadMode { | ||||
| 		case opAddrModeImmediate: | ||||
| 			if sz != 4 { | ||||
| 				return ri | ||||
| 			} | ||||
| 			return LoadConstant{Dst: reg, Val: ri.K} | ||||
| 		case opAddrModeScratch: | ||||
| 			if sz != 4 || ri.K > 15 { | ||||
| 				return ri | ||||
| 			} | ||||
| 			return LoadScratch{Dst: reg, N: int(ri.K)} | ||||
| 		case opAddrModeAbsolute: | ||||
| 			if ri.K > extOffset+0xffffffff { | ||||
| 				return LoadExtension{Num: Extension(-extOffset + ri.K)} | ||||
| 			} | ||||
| 			return LoadAbsolute{Size: sz, Off: ri.K} | ||||
| 		case opAddrModeIndirect: | ||||
| 			return LoadIndirect{Size: sz, Off: ri.K} | ||||
| 		case opAddrModePacketLen: | ||||
| 			if sz != 4 { | ||||
| 				return ri | ||||
| 			} | ||||
| 			return LoadExtension{Num: ExtLen} | ||||
| 		case opAddrModeMemShift: | ||||
| 			return LoadMemShift{Off: ri.K} | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
|  | ||||
| 	case opClsStoreA: | ||||
| 		if ri.Op != opClsStoreA || ri.K > 15 { | ||||
| 			return ri | ||||
| 		} | ||||
| 		return StoreScratch{Src: RegA, N: int(ri.K)} | ||||
|  | ||||
| 	case opClsStoreX: | ||||
| 		if ri.Op != opClsStoreX || ri.K > 15 { | ||||
| 			return ri | ||||
| 		} | ||||
| 		return StoreScratch{Src: RegX, N: int(ri.K)} | ||||
|  | ||||
| 	case opClsALU: | ||||
| 		switch op := ALUOp(ri.Op & opMaskOperator); op { | ||||
| 		case ALUOpAdd, ALUOpSub, ALUOpMul, ALUOpDiv, ALUOpOr, ALUOpAnd, ALUOpShiftLeft, ALUOpShiftRight, ALUOpMod, ALUOpXor: | ||||
| 			switch operand := opOperand(ri.Op & opMaskOperand); operand { | ||||
| 			case opOperandX: | ||||
| 				return ALUOpX{Op: op} | ||||
| 			case opOperandConstant: | ||||
| 				return ALUOpConstant{Op: op, Val: ri.K} | ||||
| 			default: | ||||
| 				return ri | ||||
| 			} | ||||
| 		case aluOpNeg: | ||||
| 			return NegateA{} | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
|  | ||||
| 	case opClsJump: | ||||
| 		switch op := jumpOp(ri.Op & opMaskOperator); op { | ||||
| 		case opJumpAlways: | ||||
| 			return Jump{Skip: ri.K} | ||||
| 		case opJumpEqual, opJumpGT, opJumpGE, opJumpSet: | ||||
| 			cond, skipTrue, skipFalse := jumpOpToTest(op, ri.Jt, ri.Jf) | ||||
| 			switch operand := opOperand(ri.Op & opMaskOperand); operand { | ||||
| 			case opOperandX: | ||||
| 				return JumpIfX{Cond: cond, SkipTrue: skipTrue, SkipFalse: skipFalse} | ||||
| 			case opOperandConstant: | ||||
| 				return JumpIf{Cond: cond, Val: ri.K, SkipTrue: skipTrue, SkipFalse: skipFalse} | ||||
| 			default: | ||||
| 				return ri | ||||
| 			} | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
|  | ||||
| 	case opClsReturn: | ||||
| 		switch ri.Op { | ||||
| 		case opClsReturn | opRetSrcA: | ||||
| 			return RetA{} | ||||
| 		case opClsReturn | opRetSrcConstant: | ||||
| 			return RetConstant{Val: ri.K} | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
|  | ||||
| 	case opClsMisc: | ||||
| 		switch ri.Op { | ||||
| 		case opClsMisc | opMiscTAX: | ||||
| 			return TAX{} | ||||
| 		case opClsMisc | opMiscTXA: | ||||
| 			return TXA{} | ||||
| 		default: | ||||
| 			return ri | ||||
| 		} | ||||
|  | ||||
| 	default: | ||||
| 		panic("unreachable") // switch is exhaustive on the bit pattern | ||||
| 	} | ||||
| } | ||||
|  | ||||
| func jumpOpToTest(op jumpOp, skipTrue uint8, skipFalse uint8) (JumpTest, uint8, uint8) { | ||||
| 	var test JumpTest | ||||
|  | ||||
| 	// Decode "fake" jump conditions that don't appear in machine code | ||||
| 	// Ensures the Assemble -> Disassemble stage recreates the same instructions | ||||
| 	// See https://github.com/golang/go/issues/18470 | ||||
| 	if skipTrue == 0 { | ||||
| 		switch op { | ||||
| 		case opJumpEqual: | ||||
| 			test = JumpNotEqual | ||||
| 		case opJumpGT: | ||||
| 			test = JumpLessOrEqual | ||||
| 		case opJumpGE: | ||||
| 			test = JumpLessThan | ||||
| 		case opJumpSet: | ||||
| 			test = JumpBitsNotSet | ||||
| 		} | ||||
|  | ||||
| 		return test, skipFalse, 0 | ||||
| 	} | ||||
|  | ||||
| 	switch op { | ||||
| 	case opJumpEqual: | ||||
| 		test = JumpEqual | ||||
| 	case opJumpGT: | ||||
| 		test = JumpGreaterThan | ||||
| 	case opJumpGE: | ||||
| 		test = JumpGreaterOrEqual | ||||
| 	case opJumpSet: | ||||
| 		test = JumpBitsSet | ||||
| 	} | ||||
|  | ||||
| 	return test, skipTrue, skipFalse | ||||
| } | ||||
|  | ||||
| // LoadConstant loads Val into register Dst. | ||||
| type LoadConstant struct { | ||||
| 	Dst Register | ||||
| 	Val uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadConstant) Assemble() (RawInstruction, error) { | ||||
| 	return assembleLoad(a.Dst, 4, opAddrModeImmediate, a.Val) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadConstant) String() string { | ||||
| 	switch a.Dst { | ||||
| 	case RegA: | ||||
| 		return fmt.Sprintf("ld #%d", a.Val) | ||||
| 	case RegX: | ||||
| 		return fmt.Sprintf("ldx #%d", a.Val) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // LoadScratch loads scratch[N] into register Dst. | ||||
| type LoadScratch struct { | ||||
| 	Dst Register | ||||
| 	N   int // 0-15 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadScratch) Assemble() (RawInstruction, error) { | ||||
| 	if a.N < 0 || a.N > 15 { | ||||
| 		return RawInstruction{}, fmt.Errorf("invalid scratch slot %d", a.N) | ||||
| 	} | ||||
| 	return assembleLoad(a.Dst, 4, opAddrModeScratch, uint32(a.N)) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadScratch) String() string { | ||||
| 	switch a.Dst { | ||||
| 	case RegA: | ||||
| 		return fmt.Sprintf("ld M[%d]", a.N) | ||||
| 	case RegX: | ||||
| 		return fmt.Sprintf("ldx M[%d]", a.N) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // LoadAbsolute loads packet[Off:Off+Size] as an integer value into | ||||
| // register A. | ||||
| type LoadAbsolute struct { | ||||
| 	Off  uint32 | ||||
| 	Size int // 1, 2 or 4 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadAbsolute) Assemble() (RawInstruction, error) { | ||||
| 	return assembleLoad(RegA, a.Size, opAddrModeAbsolute, a.Off) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadAbsolute) String() string { | ||||
| 	switch a.Size { | ||||
| 	case 1: // byte | ||||
| 		return fmt.Sprintf("ldb [%d]", a.Off) | ||||
| 	case 2: // half word | ||||
| 		return fmt.Sprintf("ldh [%d]", a.Off) | ||||
| 	case 4: // word | ||||
| 		if a.Off > extOffset+0xffffffff { | ||||
| 			return LoadExtension{Num: Extension(a.Off + 0x1000)}.String() | ||||
| 		} | ||||
| 		return fmt.Sprintf("ld [%d]", a.Off) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // LoadIndirect loads packet[X+Off:X+Off+Size] as an integer value | ||||
| // into register A. | ||||
| type LoadIndirect struct { | ||||
| 	Off  uint32 | ||||
| 	Size int // 1, 2 or 4 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadIndirect) Assemble() (RawInstruction, error) { | ||||
| 	return assembleLoad(RegA, a.Size, opAddrModeIndirect, a.Off) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadIndirect) String() string { | ||||
| 	switch a.Size { | ||||
| 	case 1: // byte | ||||
| 		return fmt.Sprintf("ldb [x + %d]", a.Off) | ||||
| 	case 2: // half word | ||||
| 		return fmt.Sprintf("ldh [x + %d]", a.Off) | ||||
| 	case 4: // word | ||||
| 		return fmt.Sprintf("ld [x + %d]", a.Off) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // LoadMemShift multiplies the first 4 bits of the byte at packet[Off] | ||||
| // by 4 and stores the result in register X. | ||||
| // | ||||
| // This instruction is mainly useful to load into X the length of an | ||||
| // IPv4 packet header in a single instruction, rather than have to do | ||||
| // the arithmetic on the header's first byte by hand. | ||||
| type LoadMemShift struct { | ||||
| 	Off uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadMemShift) Assemble() (RawInstruction, error) { | ||||
| 	return assembleLoad(RegX, 1, opAddrModeMemShift, a.Off) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadMemShift) String() string { | ||||
| 	return fmt.Sprintf("ldx 4*([%d]&0xf)", a.Off) | ||||
| } | ||||
|  | ||||
| // LoadExtension invokes a linux-specific extension and stores the | ||||
| // result in register A. | ||||
| type LoadExtension struct { | ||||
| 	Num Extension | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a LoadExtension) Assemble() (RawInstruction, error) { | ||||
| 	if a.Num == ExtLen { | ||||
| 		return assembleLoad(RegA, 4, opAddrModePacketLen, 0) | ||||
| 	} | ||||
| 	return assembleLoad(RegA, 4, opAddrModeAbsolute, uint32(extOffset+a.Num)) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a LoadExtension) String() string { | ||||
| 	switch a.Num { | ||||
| 	case ExtLen: | ||||
| 		return "ld #len" | ||||
| 	case ExtProto: | ||||
| 		return "ld #proto" | ||||
| 	case ExtType: | ||||
| 		return "ld #type" | ||||
| 	case ExtPayloadOffset: | ||||
| 		return "ld #poff" | ||||
| 	case ExtInterfaceIndex: | ||||
| 		return "ld #ifidx" | ||||
| 	case ExtNetlinkAttr: | ||||
| 		return "ld #nla" | ||||
| 	case ExtNetlinkAttrNested: | ||||
| 		return "ld #nlan" | ||||
| 	case ExtMark: | ||||
| 		return "ld #mark" | ||||
| 	case ExtQueue: | ||||
| 		return "ld #queue" | ||||
| 	case ExtLinkLayerType: | ||||
| 		return "ld #hatype" | ||||
| 	case ExtRXHash: | ||||
| 		return "ld #rxhash" | ||||
| 	case ExtCPUID: | ||||
| 		return "ld #cpu" | ||||
| 	case ExtVLANTag: | ||||
| 		return "ld #vlan_tci" | ||||
| 	case ExtVLANTagPresent: | ||||
| 		return "ld #vlan_avail" | ||||
| 	case ExtVLANProto: | ||||
| 		return "ld #vlan_tpid" | ||||
| 	case ExtRand: | ||||
| 		return "ld #rand" | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // StoreScratch stores register Src into scratch[N]. | ||||
| type StoreScratch struct { | ||||
| 	Src Register | ||||
| 	N   int // 0-15 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a StoreScratch) Assemble() (RawInstruction, error) { | ||||
| 	if a.N < 0 || a.N > 15 { | ||||
| 		return RawInstruction{}, fmt.Errorf("invalid scratch slot %d", a.N) | ||||
| 	} | ||||
| 	var op uint16 | ||||
| 	switch a.Src { | ||||
| 	case RegA: | ||||
| 		op = opClsStoreA | ||||
| 	case RegX: | ||||
| 		op = opClsStoreX | ||||
| 	default: | ||||
| 		return RawInstruction{}, fmt.Errorf("invalid source register %v", a.Src) | ||||
| 	} | ||||
|  | ||||
| 	return RawInstruction{ | ||||
| 		Op: op, | ||||
| 		K:  uint32(a.N), | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a StoreScratch) String() string { | ||||
| 	switch a.Src { | ||||
| 	case RegA: | ||||
| 		return fmt.Sprintf("st M[%d]", a.N) | ||||
| 	case RegX: | ||||
| 		return fmt.Sprintf("stx M[%d]", a.N) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // ALUOpConstant executes A = A <Op> Val. | ||||
| type ALUOpConstant struct { | ||||
| 	Op  ALUOp | ||||
| 	Val uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a ALUOpConstant) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsALU | uint16(opOperandConstant) | uint16(a.Op), | ||||
| 		K:  a.Val, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a ALUOpConstant) String() string { | ||||
| 	switch a.Op { | ||||
| 	case ALUOpAdd: | ||||
| 		return fmt.Sprintf("add #%d", a.Val) | ||||
| 	case ALUOpSub: | ||||
| 		return fmt.Sprintf("sub #%d", a.Val) | ||||
| 	case ALUOpMul: | ||||
| 		return fmt.Sprintf("mul #%d", a.Val) | ||||
| 	case ALUOpDiv: | ||||
| 		return fmt.Sprintf("div #%d", a.Val) | ||||
| 	case ALUOpMod: | ||||
| 		return fmt.Sprintf("mod #%d", a.Val) | ||||
| 	case ALUOpAnd: | ||||
| 		return fmt.Sprintf("and #%d", a.Val) | ||||
| 	case ALUOpOr: | ||||
| 		return fmt.Sprintf("or #%d", a.Val) | ||||
| 	case ALUOpXor: | ||||
| 		return fmt.Sprintf("xor #%d", a.Val) | ||||
| 	case ALUOpShiftLeft: | ||||
| 		return fmt.Sprintf("lsh #%d", a.Val) | ||||
| 	case ALUOpShiftRight: | ||||
| 		return fmt.Sprintf("rsh #%d", a.Val) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // ALUOpX executes A = A <Op> X | ||||
| type ALUOpX struct { | ||||
| 	Op ALUOp | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a ALUOpX) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsALU | uint16(opOperandX) | uint16(a.Op), | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a ALUOpX) String() string { | ||||
| 	switch a.Op { | ||||
| 	case ALUOpAdd: | ||||
| 		return "add x" | ||||
| 	case ALUOpSub: | ||||
| 		return "sub x" | ||||
| 	case ALUOpMul: | ||||
| 		return "mul x" | ||||
| 	case ALUOpDiv: | ||||
| 		return "div x" | ||||
| 	case ALUOpMod: | ||||
| 		return "mod x" | ||||
| 	case ALUOpAnd: | ||||
| 		return "and x" | ||||
| 	case ALUOpOr: | ||||
| 		return "or x" | ||||
| 	case ALUOpXor: | ||||
| 		return "xor x" | ||||
| 	case ALUOpShiftLeft: | ||||
| 		return "lsh x" | ||||
| 	case ALUOpShiftRight: | ||||
| 		return "rsh x" | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown instruction: %#v", a) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| // NegateA executes A = -A. | ||||
| type NegateA struct{} | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a NegateA) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsALU | uint16(aluOpNeg), | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a NegateA) String() string { | ||||
| 	return fmt.Sprintf("neg") | ||||
| } | ||||
|  | ||||
| // Jump skips the following Skip instructions in the program. | ||||
| type Jump struct { | ||||
| 	Skip uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a Jump) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsJump | uint16(opJumpAlways), | ||||
| 		K:  a.Skip, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a Jump) String() string { | ||||
| 	return fmt.Sprintf("ja %d", a.Skip) | ||||
| } | ||||
|  | ||||
| // JumpIf skips the following Skip instructions in the program if A | ||||
| // <Cond> Val is true. | ||||
| type JumpIf struct { | ||||
| 	Cond      JumpTest | ||||
| 	Val       uint32 | ||||
| 	SkipTrue  uint8 | ||||
| 	SkipFalse uint8 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a JumpIf) Assemble() (RawInstruction, error) { | ||||
| 	return jumpToRaw(a.Cond, opOperandConstant, a.Val, a.SkipTrue, a.SkipFalse) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a JumpIf) String() string { | ||||
| 	return jumpToString(a.Cond, fmt.Sprintf("#%d", a.Val), a.SkipTrue, a.SkipFalse) | ||||
| } | ||||
|  | ||||
| // JumpIfX skips the following Skip instructions in the program if A | ||||
| // <Cond> X is true. | ||||
| type JumpIfX struct { | ||||
| 	Cond      JumpTest | ||||
| 	SkipTrue  uint8 | ||||
| 	SkipFalse uint8 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a JumpIfX) Assemble() (RawInstruction, error) { | ||||
| 	return jumpToRaw(a.Cond, opOperandX, 0, a.SkipTrue, a.SkipFalse) | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a JumpIfX) String() string { | ||||
| 	return jumpToString(a.Cond, "x", a.SkipTrue, a.SkipFalse) | ||||
| } | ||||
|  | ||||
| // jumpToRaw assembles a jump instruction into a RawInstruction | ||||
| func jumpToRaw(test JumpTest, operand opOperand, k uint32, skipTrue, skipFalse uint8) (RawInstruction, error) { | ||||
| 	var ( | ||||
| 		cond jumpOp | ||||
| 		flip bool | ||||
| 	) | ||||
| 	switch test { | ||||
| 	case JumpEqual: | ||||
| 		cond = opJumpEqual | ||||
| 	case JumpNotEqual: | ||||
| 		cond, flip = opJumpEqual, true | ||||
| 	case JumpGreaterThan: | ||||
| 		cond = opJumpGT | ||||
| 	case JumpLessThan: | ||||
| 		cond, flip = opJumpGE, true | ||||
| 	case JumpGreaterOrEqual: | ||||
| 		cond = opJumpGE | ||||
| 	case JumpLessOrEqual: | ||||
| 		cond, flip = opJumpGT, true | ||||
| 	case JumpBitsSet: | ||||
| 		cond = opJumpSet | ||||
| 	case JumpBitsNotSet: | ||||
| 		cond, flip = opJumpSet, true | ||||
| 	default: | ||||
| 		return RawInstruction{}, fmt.Errorf("unknown JumpTest %v", test) | ||||
| 	} | ||||
| 	jt, jf := skipTrue, skipFalse | ||||
| 	if flip { | ||||
| 		jt, jf = jf, jt | ||||
| 	} | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsJump | uint16(cond) | uint16(operand), | ||||
| 		Jt: jt, | ||||
| 		Jf: jf, | ||||
| 		K:  k, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // jumpToString converts a jump instruction to assembler notation | ||||
| func jumpToString(cond JumpTest, operand string, skipTrue, skipFalse uint8) string { | ||||
| 	switch cond { | ||||
| 	// K == A | ||||
| 	case JumpEqual: | ||||
| 		return conditionalJump(operand, skipTrue, skipFalse, "jeq", "jneq") | ||||
| 	// K != A | ||||
| 	case JumpNotEqual: | ||||
| 		return fmt.Sprintf("jneq %s,%d", operand, skipTrue) | ||||
| 	// K > A | ||||
| 	case JumpGreaterThan: | ||||
| 		return conditionalJump(operand, skipTrue, skipFalse, "jgt", "jle") | ||||
| 	// K < A | ||||
| 	case JumpLessThan: | ||||
| 		return fmt.Sprintf("jlt %s,%d", operand, skipTrue) | ||||
| 	// K >= A | ||||
| 	case JumpGreaterOrEqual: | ||||
| 		return conditionalJump(operand, skipTrue, skipFalse, "jge", "jlt") | ||||
| 	// K <= A | ||||
| 	case JumpLessOrEqual: | ||||
| 		return fmt.Sprintf("jle %s,%d", operand, skipTrue) | ||||
| 	// K & A != 0 | ||||
| 	case JumpBitsSet: | ||||
| 		if skipFalse > 0 { | ||||
| 			return fmt.Sprintf("jset %s,%d,%d", operand, skipTrue, skipFalse) | ||||
| 		} | ||||
| 		return fmt.Sprintf("jset %s,%d", operand, skipTrue) | ||||
| 	// K & A == 0, there is no assembler instruction for JumpBitNotSet, use JumpBitSet and invert skips | ||||
| 	case JumpBitsNotSet: | ||||
| 		return jumpToString(JumpBitsSet, operand, skipFalse, skipTrue) | ||||
| 	default: | ||||
| 		return fmt.Sprintf("unknown JumpTest %#v", cond) | ||||
| 	} | ||||
| } | ||||
|  | ||||
| func conditionalJump(operand string, skipTrue, skipFalse uint8, positiveJump, negativeJump string) string { | ||||
| 	if skipTrue > 0 { | ||||
| 		if skipFalse > 0 { | ||||
| 			return fmt.Sprintf("%s %s,%d,%d", positiveJump, operand, skipTrue, skipFalse) | ||||
| 		} | ||||
| 		return fmt.Sprintf("%s %s,%d", positiveJump, operand, skipTrue) | ||||
| 	} | ||||
| 	return fmt.Sprintf("%s %s,%d", negativeJump, operand, skipFalse) | ||||
| } | ||||
|  | ||||
| // RetA exits the BPF program, returning the value of register A. | ||||
| type RetA struct{} | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a RetA) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsReturn | opRetSrcA, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a RetA) String() string { | ||||
| 	return fmt.Sprintf("ret a") | ||||
| } | ||||
|  | ||||
| // RetConstant exits the BPF program, returning a constant value. | ||||
| type RetConstant struct { | ||||
| 	Val uint32 | ||||
| } | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a RetConstant) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsReturn | opRetSrcConstant, | ||||
| 		K:  a.Val, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a RetConstant) String() string { | ||||
| 	return fmt.Sprintf("ret #%d", a.Val) | ||||
| } | ||||
|  | ||||
| // TXA copies the value of register X to register A. | ||||
| type TXA struct{} | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a TXA) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsMisc | opMiscTXA, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a TXA) String() string { | ||||
| 	return fmt.Sprintf("txa") | ||||
| } | ||||
|  | ||||
| // TAX copies the value of register A to register X. | ||||
| type TAX struct{} | ||||
|  | ||||
| // Assemble implements the Instruction Assemble method. | ||||
| func (a TAX) Assemble() (RawInstruction, error) { | ||||
| 	return RawInstruction{ | ||||
| 		Op: opClsMisc | opMiscTAX, | ||||
| 	}, nil | ||||
| } | ||||
|  | ||||
| // String returns the instruction in assembler notation. | ||||
| func (a TAX) String() string { | ||||
| 	return fmt.Sprintf("tax") | ||||
| } | ||||
|  | ||||
| func assembleLoad(dst Register, loadSize int, mode uint16, k uint32) (RawInstruction, error) { | ||||
| 	var ( | ||||
| 		cls uint16 | ||||
| 		sz  uint16 | ||||
| 	) | ||||
| 	switch dst { | ||||
| 	case RegA: | ||||
| 		cls = opClsLoadA | ||||
| 	case RegX: | ||||
| 		cls = opClsLoadX | ||||
| 	default: | ||||
| 		return RawInstruction{}, fmt.Errorf("invalid target register %v", dst) | ||||
| 	} | ||||
| 	switch loadSize { | ||||
| 	case 1: | ||||
| 		sz = opLoadWidth1 | ||||
| 	case 2: | ||||
| 		sz = opLoadWidth2 | ||||
| 	case 4: | ||||
| 		sz = opLoadWidth4 | ||||
| 	default: | ||||
| 		return RawInstruction{}, fmt.Errorf("invalid load byte length %d", sz) | ||||
| 	} | ||||
| 	return RawInstruction{ | ||||
| 		Op: cls | sz | mode, | ||||
| 		K:  k, | ||||
| 	}, nil | ||||
| } | ||||
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