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/* $OpenBSD: syscall.h,v 1.20 2006/05/03 16:10:52 drahn Exp $ */
/*
* Copyright (c) 1998 Per Fogelstrom, Opsycon AB
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef __DL_SYSCALL_H__
#define __DL_SYSCALL_H__
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/signal.h>
#include <sys/time.h>
static off_t _dl_lseek(int, off_t, int);
#ifndef _dl_MAX_ERRNO
#define _dl_MAX_ERRNO 4096
#endif
#define _dl_check_error(__res) \
((int) __res < 0 && (int) __res >= -_dl_MAX_ERRNO)
/*
* Inlined system call functions that can be used before
* any dynamic address resolving has been done.
*/
static inline void
_dl_exit(int status)
{
register int __status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"sc"
: "=r" (__status)
: "I" (SYS_exit), "r" (status) : "0", "3");
while (1)
;
}
static inline int
_dl_open(const char* addr, int flags)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_open), "r" (addr), "r" (flags)
: "0", "3", "4" );
return status;
}
static inline int
_dl_close(int fd)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_close), "r" (fd)
: "0", "3");
return status;
}
static inline ssize_t
_dl_write(int fd, const char* buf, size_t len)
{
register ssize_t status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_write), "r" (fd), "r" (buf), "r" (len)
: "0", "3", "4", "5" );
return status;
}
static inline ssize_t
_dl_read(int fd, const char* buf, size_t len)
{
register ssize_t status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_read), "r" (fd), "r" (buf), "r" (len)
: "0", "3", "4", "5");
return status;
}
#define STRINGIFY(x) #x
#define XSTRINGIFY(x) STRINGIFY(x)
long _dl__syscall(quad_t val, ...);
static inline void *
_dl_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
{
return((void *)_dl__syscall((quad_t)SYS_mmap, addr, len, prot,
flags, fd, 0, offset));
}
static inline int
_dl_munmap(const void* addr, size_t len)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_munmap), "r" (addr), "r" (len)
: "0", "3", "4");
return status;
}
static inline int
_dl_mprotect(const void *addr, size_t size, int prot)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_mprotect), "r" (addr), "r" (size), "r" (prot)
: "0", "3", "4", "5");
return status;
}
static inline int
_dl_stat(const char *addr, struct stat *sb)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_stat), "r" (addr), "r" (sb)
: "0", "3", "4");
return status;
}
static inline int
_dl_fstat(int fd, struct stat *sb)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_fstat), "r" (fd), "r" (sb)
: "0", "3", "4");
return status;
}
static inline int
_dl_fcntl(int fd, int cmd, int flag)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
: "=r" (status)
: "I" (SYS_fcntl), "r" (fd), "r" (cmd), "r"(flag)
: "0", "3", "4", "5");
return status;
}
static inline int
_dl_getdirentries(int fd, char *buf, int nbytes, long *basep)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"mr 6,%5\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_getdirentries), "r" (fd), "r" (buf), "r"(nbytes),
"r" (basep)
: "0", "3", "4", "5", "6");
return status;
}
static inline int
_dl_issetugid(void)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_issetugid)
: "0", "3");
return status;
}
static inline off_t
_dl_lseek(int fildes, off_t offset, int whence)
{
return _dl__syscall((quad_t)SYS_lseek, fildes, 0, offset, whence);
}
static inline int
_dl_sigprocmask(int how, const sigset_t *set, sigset_t *oset)
{
sigset_t sig_store;
sigset_t sig_store1;
if (set != NULL) {
sig_store1 = *set;
} else {
sig_store1 = 0;
}
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"mr %0, 3"
: "=r" (sig_store)
: "I" (SYS_sigprocmask), "r" (how), "r" (sig_store1)
: "0", "3", "4");
if (oset != NULL)
*oset = sig_store;
return 0;
}
static inline int
_dl_sysctl(int *name, u_int namelen, void *oldp, size_t *oldplen, void *newp,
size_t newlen)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"mr 5,%4\n\t"
"mr 6,%5\n\t"
"mr 7,%6\n\t"
"mr 8,%7\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS___sysctl), "r" (name), "r" (namelen), "r" (oldp),
"r" (oldplen), "r" (newp), "r" (newlen)
: "0", "3", "4", "5", "6", "7", "8");
return status;
}
static inline int
_dl_gettimeofday(struct timeval *tp, struct timezone *tzp)
{
register int status;
__asm__ volatile ("li 0,%1\n\t"
"mr 3,%2\n\t"
"mr 4,%3\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
"mr %0,3\n\t"
: "=r" (status)
: "I" (SYS_gettimeofday), "r" (tp), "r" (tzp)
: "0", "3", "4" );
return status;
}
#endif /*__DL_SYSCALL_H__*/
|
