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/* $OpenBSD: syscall.h,v 1.3 2000/10/01 00:51:20 rahnds 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed under OpenBSD by
* Per Fogelstrom, Opsycon AB, Sweden.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
*/
#ifdef USE_CACHE
#include <sys/stat.h>
#endif
#include <sys/syscall.h>
#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 resoving has been done.
*/
void _dl_printf(const char *, ...);
static inline int
_dl_exit (int status)
{
register int __status __asm__ ("3");
__asm__ volatile ("mr 0,%1\n\t"
"mr 3,%2\n\t"
"sc"
: "=r" (__status)
: "r" (SYS_exit), "r" (status) : "0", "3");
while(1);
}
static inline int
_dl_open (const char* addr, unsigned int flags)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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:"
: "=r" (status)
: "r" (SYS_open), "r" (addr), "r" (flags)
: "0", "3", "4" );
return status;
}
static inline int
_dl_close (int fd)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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:"
: "=r" (status)
: "r" (SYS_close), "r" (fd)
: "0", "3");
return status;
}
static inline int
_dl_write (int fd, const char* buf, int len)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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)
: "r" (SYS_write), "r" (fd), "r" (buf), "r" (len)
: "0", "3", "4", "5" );
return status;
}
static inline int
_dl_read (int fd, const char* buf, int len)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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)
: "r" (SYS_read), "r" (fd), "r" (buf), "r" (len)
: "0", "3", "4", "5");
return status;
}
#define STRINGIFY(x) #x
#define XSTRINGIFY(x) STRINGIFY(x)
int _dl__syscall(quad_t val, ...);
__asm__(".align 2\n\t"
".type _dl__syscall,@function\n"
"_dl__syscall:\n\t"
"li 0, " XSTRINGIFY(SYS___syscall) "\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3, -1\n\t"
"1:\n\t"
"blr");
static int
_dl_mmap (void *addr, unsigned int len, unsigned int prot,
unsigned int flags, int fd, off_t offset)
{
return((int)_dl__syscall((quad_t)SYS_mmap, addr, len, prot,
flags, fd, 0, offset));
}
static inline int
_dl_munmap (const void* addr, unsigned int len)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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:"
: "=r" (status)
: "r" (SYS_munmap), "r" (addr), "r" (len)
: "0", "3", "4");
return status;
}
static inline int
_dl_mprotect (const void *addr, int size, int prot)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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)
: "r" (SYS_mprotect), "r" (addr), "r" (size), "r" (prot)
: "0", "3", "4", "5");
return status;
}
#ifdef USE_CACHE
static inline int
_dl_stat (const char *addr, struct stat *sb)
{
register int status __asm__ ("3");
__asm__ volatile ("mr 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:"
: "=r" (status)
: "r" (SYS_stat), "r" (addr), "r" (sb)
: "0", "3", "4");
return status;
}
#endif
/* Not an actual syscall, but we need something in assembly to say
whether this is OK or not. */
static inline int
_dl_getuid ()
{
register int status __asm__ ("3");
__asm__ volatile ("mr 0,%1\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
: "=r" (status)
: "r" (SYS_getuid)
: "0", "3");
return status;
}
static inline int
_dl_geteuid ()
{
register int status __asm__ ("3");
__asm__ volatile ("mr 0,%1\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
: "=r" (status)
: "r" (SYS_geteuid)
: "0", "3");
return status;
}
static inline int
_dl_getgid ()
{
register int status __asm__ ("3");
__asm__ volatile ("mr 0,%1\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
: "=r" (status)
: "r" (SYS_getgid)
: "0", "3");
return status;
}
static inline int
_dl_getegid ()
{
register int status __asm__ ("3");
__asm__ volatile ("mr 0,%1\n\t"
"sc\n\t"
"cmpwi 0, 0\n\t"
"beq 1f\n\t"
"li 3,-1\n\t"
"1:"
: "=r" (status)
: "r" (SYS_getgid)
: "0", "3");
return status;
}
static inline int
_dl_suid_ok (void)
{
unsigned int uid, euid, gid, egid;
uid = _dl_getuid();
euid = _dl_geteuid();
gid = _dl_getgid();
egid = _dl_getegid();
return (uid == euid && gid == egid);
}
#include <elf_abi.h>
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