| mgouda | 64be882 | 2025-05-30 10:44:00 +0530 | [diff] [blame^] | 1 | // Copyright 2025 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | //go:build go1.21 && (aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos) |
| 6 | |
| 7 | package unix |
| 8 | |
| 9 | import ( |
| 10 | "syscall" |
| 11 | "unsafe" |
| 12 | ) |
| 13 | |
| 14 | //go:linkname runtime_getAuxv runtime.getAuxv |
| 15 | func runtime_getAuxv() []uintptr |
| 16 | |
| 17 | // Auxv returns the ELF auxiliary vector as a sequence of key/value pairs. |
| 18 | // The returned slice is always a fresh copy, owned by the caller. |
| 19 | // It returns an error on non-ELF platforms, or if the auxiliary vector cannot be accessed, |
| 20 | // which happens in some locked-down environments and build modes. |
| 21 | func Auxv() ([][2]uintptr, error) { |
| 22 | vec := runtime_getAuxv() |
| 23 | vecLen := len(vec) |
| 24 | |
| 25 | if vecLen == 0 { |
| 26 | return nil, syscall.ENOENT |
| 27 | } |
| 28 | |
| 29 | if vecLen%2 != 0 { |
| 30 | return nil, syscall.EINVAL |
| 31 | } |
| 32 | |
| 33 | result := make([]uintptr, vecLen) |
| 34 | copy(result, vec) |
| 35 | return unsafe.Slice((*[2]uintptr)(unsafe.Pointer(&result[0])), vecLen/2), nil |
| 36 | } |