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or1k: Add prctl wrapper to unwrap variadic args

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On OpenRISC variadic functions and regular functions have different
calling conventions so this wrapper is needed to translate.  This
wrapper is copied from x86_64/x32.  I don't know the build system enough
to find a cleaner way to share the code between x86_64/x32 and or1k
(maybe Implies?), so I went with the straight copy.

This fixes test failures:

  misc/tst-prctl
  nptl/tst-setgetname
This commit is contained in:
Stafford Horne 2024-03-19 21:01:24 +00:00
parent df7e29e2a4
commit ad05a42370
1 changed files with 42 additions and 0 deletions
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42
sysdeps/unix/sysv/linux/or1k/prctl.c Normal file
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/* prctl - Linux specific syscall. OpenRISC version.
Copyright (C) 2024 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 <sysdep.h>
#include <stdarg.h>
#include <sys/prctl.h>
/* Unconditionally read all potential arguments. This may pass
garbage values to the kernel, but avoids the need for teaching
glibc the argument counts of individual options (including ones
that are added to the kernel in the future). */
int
__prctl (int option, ...)
{
va_list arg;
va_start (arg, option);
unsigned long int arg2 = va_arg (arg, unsigned long int);
unsigned long int arg3 = va_arg (arg, unsigned long int);
unsigned long int arg4 = va_arg (arg, unsigned long int);
unsigned long int arg5 = va_arg (arg, unsigned long int);
va_end (arg);
return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
}
libc_hidden_def (__prctl)
weak_alias (__prctl, prctl)