1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package objdump is a wrapper around relevant objdump flags.
package objdump
import (
"flag"
"fmt"
"io"
"os"
"os/exec"
)
var (
// Binary is the binary under analysis.
//
// See Reader, below.
binary = flag.String("binary", "", "binary under analysis")
// Reader is the input stream.
//
// This may be set instead of Binary.
Reader io.Reader
// objdumpTool is the tool used to dump a binary.
objdumpTool = flag.String("objdump_tool", "", "tool used to dump a binary")
)
// LoadRaw reads the raw object output.
func LoadRaw(fn func(r io.Reader) error) error {
var r io.Reader
if *binary != "" {
f, err := os.Open(*binary)
if err != nil {
return err
}
defer f.Close()
r = f
} else if Reader != nil {
r = Reader
} else {
// We have no input stream.
return fmt.Errorf("no binary or reader provided")
}
return fn(r)
}
// Load reads the objdump output.
func Load(fn func(r io.Reader) error) error {
var (
args []string
stdin io.Reader
)
if *binary != "" {
args = append(args, *binary)
} else if Reader != nil {
stdin = Reader
} else {
// We have no input stream or binary.
return fmt.Errorf("no binary or reader provided")
}
// Construct our command.
cmd := exec.Command(*objdumpTool, args...)
cmd.Stdin = stdin
cmd.Stderr = os.Stderr
out, err := cmd.StdoutPipe()
if err != nil {
return err
}
if err := cmd.Start(); err != nil {
return err
}
// Call the user hook.
userErr := fn(out)
// Wait for the dump to finish.
if err := cmd.Wait(); userErr == nil && err != nil {
return err
}
return userErr
}
|
