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linux: Add generic syscall implementation

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It allows also to remove hppa specific implementation and simplify
riscv implementation a bit.
This commit is contained in:
Adhemerval Zanella
2021-11-19 15:33:16 -03:00
parent 68007900be
commit 00baddbb93
4 changed files with 65 additions and 67 deletions
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43
sysdeps/unix/sysv/linux/syscall.c Normal file
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/* Indirect system call. Linux generic implementation.
Copyright (C) 1997-2021 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 <stdarg.h>
#include <sysdep.h>
long int
syscall (long int number, ...)
{
va_list args;
va_start (args, number);
long int a0 = va_arg (args, long int);
long int a1 = va_arg (args, long int);
long int a2 = va_arg (args, long int);
long int a3 = va_arg (args, long int);
long int a4 = va_arg (args, long int);
long int a5 = va_arg (args, long int);
va_end (args);
int r = INTERNAL_SYSCALL_NCS_CALL (number, a0, a1, a2, a3, a4, a5);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (r)))
{
__set_errno (-r);
return -1;
}
return r;
}