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41 lines
1.2 KiB
41 lines
1.2 KiB
// Copyright 2016 The Go Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file. |
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package bpf |
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import "fmt" |
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// Assemble converts insts into raw instructions suitable for loading |
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// into a BPF virtual machine. |
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// |
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// Currently, no optimization is attempted, the assembled program flow |
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// is exactly as provided. |
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func Assemble(insts []Instruction) ([]RawInstruction, error) { |
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ret := make([]RawInstruction, len(insts)) |
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var err error |
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for i, inst := range insts { |
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ret[i], err = inst.Assemble() |
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if err != nil { |
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return nil, fmt.Errorf("assembling instruction %d: %s", i+1, err) |
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} |
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} |
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return ret, nil |
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} |
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// Disassemble attempts to parse raw back into |
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// Instructions. Unrecognized RawInstructions are assumed to be an |
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// extension not implemented by this package, and are passed through |
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// unchanged to the output. The allDecoded value reports whether insts |
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// contains no RawInstructions. |
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func Disassemble(raw []RawInstruction) (insts []Instruction, allDecoded bool) { |
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insts = make([]Instruction, len(raw)) |
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allDecoded = true |
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for i, r := range raw { |
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insts[i] = r.Disassemble() |
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if _, ok := insts[i].(RawInstruction); ok { |
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allDecoded = false |
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} |
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} |
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return insts, allDecoded |
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}
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