hush/libbb/module_syscalls.c
2002-11-28 10:25:19 +00:00

90 lines
2.7 KiB
C

/* vi: set sw=4 ts=4: */
/*
* some system calls possibly missing from libc
*
* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
/* Kernel headers before 2.1.mumble need this on the Alpha to get
_syscall* defined. */
#define __LIBRARY__
#include <sys/syscall.h>
#if __GNU_LIBRARY__ < 5
/* This is needed for libc5 */
#include <asm/unistd.h>
#endif
#include "libbb.h"
#if __GNU_LIBRARY__ < 5 || ((__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1))
/* These syscalls are not included as part of libc5 */
_syscall1(int, delete_module, const char *, name);
_syscall1(int, get_kernel_syms, __ptr_t, ks);
/* This may have 5 arguments (for old 2.0 kernels) or 2 arguments
* (for 2.2 and 2.4 kernels). Use the greatest common denominator,
* and let the kernel cope with whatever it gets. Its good at that. */
_syscall5(int, init_module, void *, first, void *, second, void *, third,
void *, fourth, void *, fifth);
#ifndef __NR_query_module
#warning This kernel does not support the query_module syscall
#warning -> The query_module system call is being stubbed out...
int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret)
{
error_msg("\n\nTo make this application work, you will need to recompile\n"
"with a kernel supporting the query_module system call. -Erik\n");
errno=ENOSYS;
return -1;
}
#else
_syscall5(int, query_module, const char *, name, int, which,
void *, buf, size_t, bufsize, size_t*, ret);
#endif
/* Jump through hoops to fixup error return codes */
#define __NR___create_module __NR_create_module
static inline _syscall2(long, __create_module, const char *, name, size_t, size)
unsigned long create_module(const char *name, size_t size)
{
long ret = __create_module(name, size);
if (ret == -1 && errno > 125) {
ret = -errno;
errno = 0;
}
return ret;
}
#endif /* __GNU_LIBRARY__ < 5 */
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/