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/* $OpenBSD: syscall.h,v 1.3 2002/05/24 03:44:38 deraadt 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.
*
*/
#ifndef __DL_SYSCALL_H__
#define __DL_SYSCALL_H__
#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.
*/
extern inline int
_dl_exit (int status)
{
register int __status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"syscall"
: "=r" (__status)
: "0" (SYS_exit), "r" (status)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
while (1)
;
}
extern inline int
_dl_open (const char* addr, unsigned int flags)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_open), "r" (addr), "r" (flags)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_close (int fd)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_close), "r" (fd)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_write (int fd, const char* buf, int len)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"move $6,%4\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_write), "r" (fd), "r" (buf), "r" (len)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_read (int fd, const char* buf, int len)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"move $6,%4\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_read), "r" (fd), "r" (buf), "r" (len)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_mmap (void *addr, unsigned int size, unsigned int prot,
unsigned int flags, int fd, unsigned int f_offset)
{
register int malloc_buffer __asm__ ("$2");
__asm__ volatile ("addiu $29,-40\n\t"
"move $6,%2\n\t"
"move $7,%3\n\t"
"sw %4,16($29)\n\t"
"sw %5,20($29)\n\t"
#ifdef MIPSEL
"li $4,197\n\t"
"li $5,0\n\t"
"sw %6,24($29)\n\t"
"sw $0,28($29)\n\t"
"sw %7,32($29)\n\t"
"sw $0,36($29)\n\t"
#endif
#ifdef MIPSEB
"li $4,0\n\t"
"li $5,197\n\t"
"sw %6,24($29)\n\t"
"sw $0,28($29)\n\t"
"sw $0,32($29)\n\t"
"sw %7,36($29)\n\t"
#endif
"syscall\n\t"
"addiu $29,40"
: "=r" (malloc_buffer)
: "0" (SYS___syscall), "r" (addr), "r" (size), "r" (prot),
"r" (flags), "r" (fd), "r" (f_offset)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return malloc_buffer;
}
extern inline int
_dl_munmap (const void* addr, unsigned int len)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_munmap), "r" (addr), "r" (len)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_mprotect (const void *addr, int size, int prot)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"move $6,%4\n\t"
"syscall"
: "=r" (status)
: "0" (SYS_mprotect), "r" (addr), "r" (size), "r" (prot)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
#ifdef USE_CACHE
extern inline int
_dl_stat (const char *addr, struct stat *sb)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $4,%2\n\t"
"move $5,%3\n\t"
"syscall"
: "=r" (status)
: "0" (SYS_stat), "r" (addr), "r" (sb)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
#endif
/*
* Not an actual syscall, but we need something in assembly to say
* whether this is OK or not.
*/
extern inline int
_dl_suid_ok (void)
{
unsigned int uid, euid, gid, egid;
__asm__ volatile ("move $2,%1; syscall; move %0,$2"
: "=r" (uid) : "r" (SYS_getuid)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
__asm__ volatile ("move $2,%1; syscall; move %0,$2"
: "=r" (euid) : "r" (SYS_geteuid)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
__asm__ volatile ("move $2,%1; syscall; move %0,$2"
: "=r" (gid) : "r" (SYS_getgid)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
__asm__ volatile ("move $2,%1; syscall; move %0,$2"
: "=r" (egid) : "r" (SYS_getegid)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return (uid == euid && gid == egid);
}
#endif /*__DL_SYSCALL_H__*/
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