├── LICENSE
├── README.md
└── link


/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2020 eisenxp
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
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 1 | ## macos-golink-wrapper
 2 | 
 3 | solution to "syscall.Mprotect panic: permission denied" in Golang on macOS Catalina 10.15.x when using [gomonkey](https://github.com/agiledragon/gomonkey) or [gohook](https://github.com/brahma-adshonor/gohook)
 4 | 
 5 | ## How it works
 6 | 
 7 | Change the `max_prot` value to `0x7` after linking.
 8 | 
 9 | refer to the question:
10 | https://stackoverflow.com/questions/60654834/using-mprotect-to-make-text-segment-writable-on-macos
11 | 
12 | ## Usage
13 | 
14 | Assuming Go is installed in `/opt/go`
15 | 
16 | 1. Navigate to Path: `/opt/go/pkg/tool/darwin_amd64`
17 | 2. Rename file `link` to `original_link`
18 | 3. Download [link wrapper](https://github.com/eisenxp/macos-golink-wrapper/blob/main/link) for replacement
19 | 4. Make sure link wrapper is executable: `chmod +x link`
20 | 5. Enjoy it
21 | 
22 | ## Thanks
23 | 
24 | Thanks to [Elliott Darfink](https://stackoverflow.com/users/976724/elliott-darfink) for sharing.
25 | 
26 | 
27 | ## License
28 | 
29 | [MIT](https://opensource.org/licenses/MIT)
30 | 


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/link:
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 1 | #!/usr/bin/env python3
 2 | import os
 3 | import sys
 4 | import argparse
 5 | import subprocess
 6 | 
 7 | # renamed 'link' file
 8 | original_link_file = 'original_link'
 9 | 
10 | # link first
11 | output=None
12 | code=0
13 | try:
14 |     output = subprocess.check_output([os.path.dirname(__file__) + '/' + original_link_file] + sys.argv[1:], cwd=os.getcwd())
15 | except subprocess.CalledProcessError as e:
16 |     output = e.output
17 |     code = e.returncode
18 | 
19 | if output:
20 |     output_str = str(output, encoding='utf-8')
21 |     print(output_str.replace(original_link_file, 'link'))
22 | 
23 | # change max_prot value to 0x7
24 | parser = argparse.ArgumentParser()
25 | parser.add_argument('-o')
26 | args, _ = parser.parse_known_args()
27 | 
28 | if args.o:
29 |     binary_target = args.o
30 |     # only for testing
31 |     if binary_target.endswith('.test') or binary_target.endswith('_test_go'):
32 |         with open(os.devnull, 'wb') as DEVNULL:
33 |             try:
34 |                 subprocess.check_call(["printf '\x07' | dd of=%s bs=1 seek=160 count=1 conv=notrunc" % binary_target], shell=True, stdout=DEVNULL, stderr=DEVNULL)
35 |             except subprocess.CalledProcessError as e:
36 |                 pass
37 | 
38 | sys.exit(code)
39 | 


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