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/* ==== syscall.S ============================================================
* Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
* All rights reserved.
*
* 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 by Chris Provenzano.
* 4. The name of Chris Provenzano may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
*
* Description : Machine dependent syscalls for decstation with r2000/r3000
*
* 1.00 93/08/14 proven
* -Started coding this file.
*/
.text
.ascii "$Id$";
#include <syscall.h>
#include <machine/regdef.h>
/*
* Initial asm stuff for all functions.
*/
.text
.align 2
/* ==========================================================================
* error code for all syscalls. The error value is returned as the negative
* of the errno value. Eventually I want to load the errno value directly
* into pthread_run->error but until then ...
*/
machdep_error:
negu v0, v0 /* Return negative of errno value. */
j ra
/* ==========================================================================
* Syscalls already done,
* Standard Other important BSD sockets
* fork = 2 select = 93 socket = 97
* read = 3 readv = 120 connect = 98
* write = 4 writev = 121 accept = 99
* open = 5 getdirentries = send = 101
* close = 6 recv = 102
* creat = 8 bind = 104
* link = 9 listen = 106
* unlink = 10 recvmsg = 113
* chdir = 12 sendmsg = 114
* chmod = 15 getsockopt = 118
* chown = 16 recvfrom = 125
* lseek = 19 sendto = 133
* stat = 38 shutdown = 134
* dup = 41 getpeername = 141
* pipe = 42
* execve = 59
* fstat = 62
* wait3 = 84
* dup2 = 90
* fcntl = 92
* fchown = 123
* fchmod = 124
* rename = 128
* waitpid = 189
* ======================================================================= */
/* ==========================================================================
* machdep_sys_fork()
*/
.globl machdep_sys_fork
.ent machdep_sys_fork
machdep_sys_fork:
.frame sp,0,ra /* No frame, return address in ra */
li v0,SYS_fork /* Load fork syscall # into v0 */
syscall
bne a3,zero,machdep_error /* Error if a3 != 0 */
beqz v1,__fork_parent /* Second return value = 0, if parent */
li v0,0
__fork_parent:
j ra
.end machdep_sys_fork
/* ==========================================================================
* machdep_sys_pipe()
*/
.globl machdep_sys_pipe
.ent machdep_sys_pipe
machdep_sys_pipe:
.frame sp,0,ra /* No frame, return address in ra */
li v0,SYS_pipe /* Load pipe syscall # into v0 */
syscall
bne a3,zero,machdep_error /* Error if a3 != 0 */
sw v0, 0(a0)
sw v1, 4(a0)
li v0, 0
j ra
.end machdep_sys_pipe
/* ==========================================================================
* Other important asm routines.
* ======================================================================= */
/* ==========================================================================
* fake_setjmp()
*/
.globl fake_setjmp
.ent fake_setjmp
fake_setjmp:
.frame sp,0,ra /* No frame, return address in ra */
/* Save all the important registers */
sw ra,8(a0)
sw gp,124(a0)
sw sp,128(a0)
sw s0,76(a0)
/* More registers needed. */
j ra
.end fake_longjmp
/* ==========================================================================
* machdep_sys_longjmp()
*/
.globl machdep_sys_longjmp
.ent machdep_sys_longjmp
machdep_sys_longjmp:
.frame sp,0,ra /* No frame, return address in ra */
li a1,1 /* Load 1 into reg a1 */
sw a1, 20(a0); /* Load a1 into address a0 + 20 */
li v0,SYS_sigreturn /* Load sigreturn syscall # into v0 */
syscall /* Do syscall to do longjmp */
j ra
.end machdep_sys_longjmp
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