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/* $OpenBSD: syscall.h,v 1.12 2003/07/06 20:04:00 deraadt Exp $ */
/*
* Copyright (c) 1998-2002 Opsycon AB, Sweden.
*
* 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>
extern long _dl__syscall(quad_t val, ...);
#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.
*/
extern inline int
_dl_exit(int status)
{
register int __status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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, int flags)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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 $2,%1\n\t"
"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 ssize_t
_dl_write(int fd, const char* buf, size_t len)
{
register ssize_t status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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 ssize_t
_dl_read(int fd, const char* buf, size_t len)
{
register ssize_t status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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 void *
_dl_mmap(void *addr, size_t size, int prot, int flags, int fd, off_t f_offset)
{
register void * malloc_buffer __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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, size_t len)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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, size_t size, int prot)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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;
}
extern inline int
_dl_stat(const char *addr, struct stat *sb)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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;
}
extern inline int
_dl_fstat(const int fd, struct stat *sb)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"move $4,%2\n\t"
"move $5,%3\n\t"
"syscall"
: "=r" (status)
: "0" (SYS_fstat), "r" (fd), "r" (sb)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline ssize_t
_dl_fcntl(int fd, int cmd, int flag)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"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_fcntl), "r" (fd), "r" (cmd), "r" (flag)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline ssize_t
_dl_getdirentries(int fd, char *buf, int nbytes, long *basep)
{
register int status __asm__ ("$2");
__asm__ volatile ("move $2,%1\n\t"
"move $4,%2\n\t"
"move $5,%3\n\t"
"move $6,%4\n\t"
"move $7,%5\n\t"
"syscall\n\t"
"beq $7,$0,1f\n\t"
"li $2,-1\n\t"
"1:"
: "=r" (status)
: "0" (SYS_getdirentries), "r" (fd), "r" (buf), "r" (nbytes), "r" (basep)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline int
_dl_issetugid(void)
{
register int status __asm__ ("$2");
__asm__ volatile (
"move $2,%1\n\t"
"syscall"
: "=r" (status)
: "0" (SYS_issetugid)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
"$10","$11","$12","$13","$14","$15","$24","$25");
return status;
}
extern inline off_t
_dl_lseek(int fd, off_t offset, int whence)
{
return _dl__syscall((quad_t)SYS_lseek, fd, 0, offset, whence);
}
#endif /*__DL_SYSCALL_H__*/
|
