mirror of
https://github.com/rclone/rclone.git
synced 2024-11-30 12:25:29 +01:00
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
// 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"
|
|
|
|
// Assemble converts insts into raw instructions suitable for loading
|
|
// into a BPF virtual machine.
|
|
//
|
|
// Currently, no optimization is attempted, the assembled program flow
|
|
// is exactly as provided.
|
|
func Assemble(insts []Instruction) ([]RawInstruction, error) {
|
|
ret := make([]RawInstruction, len(insts))
|
|
var err error
|
|
for i, inst := range insts {
|
|
ret[i], err = inst.Assemble()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("assembling instruction %d: %s", i+1, err)
|
|
}
|
|
}
|
|
return ret, nil
|
|
}
|
|
|
|
// Disassemble attempts to parse raw back into
|
|
// Instructions. Unrecognized RawInstructions are assumed to be an
|
|
// extension not implemented by this package, and are passed through
|
|
// unchanged to the output. The allDecoded value reports whether insts
|
|
// contains no RawInstructions.
|
|
func Disassemble(raw []RawInstruction) (insts []Instruction, allDecoded bool) {
|
|
insts = make([]Instruction, len(raw))
|
|
allDecoded = true
|
|
for i, r := range raw {
|
|
insts[i] = r.Disassemble()
|
|
if _, ok := insts[i].(RawInstruction); ok {
|
|
allDecoded = false
|
|
}
|
|
}
|
|
return insts, allDecoded
|
|
}
|