mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
562ef5e69e
The explicit error return value (without in-band signaling) avoids complicated steps to detect errors based on whether errno has been updated. Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* Copyright (C) 2012-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sys/auxv.h>
|
|
#include <errno.h>
|
|
#include <ldsodefs.h>
|
|
#include <stdbool.h>
|
|
|
|
bool
|
|
__getauxval2 (unsigned long int type, unsigned long int *result)
|
|
{
|
|
#ifdef HAVE_AUX_VECTOR
|
|
ElfW(auxv_t) *p;
|
|
#endif
|
|
|
|
if (type == AT_HWCAP)
|
|
{
|
|
*result = GLRO(dl_hwcap);
|
|
return true;
|
|
}
|
|
else if (type == AT_HWCAP2)
|
|
{
|
|
*result = GLRO(dl_hwcap2);
|
|
return true;
|
|
}
|
|
|
|
#ifdef HAVE_AUX_VECTOR
|
|
for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++)
|
|
if (p->a_type == type)
|
|
{
|
|
*result = p->a_un.a_val;
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
return false;
|
|
}
|
|
libc_hidden_def (__getauxval2)
|
|
|
|
unsigned long int
|
|
__getauxval (unsigned long int type)
|
|
{
|
|
unsigned long int result;
|
|
|
|
if (__getauxval2 (type, &result))
|
|
return result;
|
|
|
|
__set_errno (ENOENT);
|
|
return 0;
|
|
}
|
|
|
|
weak_alias (__getauxval, getauxval)
|
|
libc_hidden_def (__getauxval)
|