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// Copyright 2014 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.
// Parsing of Plan 9 a.out executables.
package main
import (
"debug/plan9obj"
"os"
"sort"
)
func plan9Symbols(f *os.File) []Sym {
p, err := plan9obj.NewFile(f)
if err != nil {
errorf("parsing %s: %v", f.Name(), err)
return nil
}
plan9Syms, err := p.Symbols()
if err != nil {
errorf("parsing %s: %v", f.Name(), err)
return nil
}
// Build sorted list of addresses of all symbols.
// We infer the size of a symbol by looking at where the next symbol begins.
var addrs []uint64
for _, s := range plan9Syms {
addrs = append(addrs, s.Value)
}
sort.Sort(uint64s(addrs))
var syms []Sym
for _, s := range plan9Syms {
sym := Sym{Addr: s.Value, Name: s.Name, Code: rune(s.Type)}
i := sort.Search(len(addrs), func(x int) bool { return addrs[x] > s.Value })
if i < len(addrs) {
sym.Size = int64(addrs[i] - s.Value)
}
syms = append(syms, sym)
}
return syms
}
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