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// Copyright (c) 2022, Google Inc.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//go:build ignore
// check_stack.go checks that each of its arguments has a non-executable stack.
// See https://www.airs.com/blog/archives/518 for details.
package main
import (
"debug/elf"
"fmt"
"os"
)
func checkStack(path string) {
file, err := elf.Open(path)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening %s: %s\n", path, err)
os.Exit(1)
}
defer file.Close()
for _, prog := range file.Progs {
if prog.Type == elf.PT_GNU_STACK && prog.Flags&elf.PF_X != 0 {
fmt.Fprintf(os.Stderr, "%s has an executable stack.\n", path)
os.Exit(1)
}
}
}
func main() {
for _, path := range os.Args[1:] {
checkStack(path)
}
}
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