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166 lines
5.2 KiB
ArmAsm
166 lines
5.2 KiB
ArmAsm
/* ==== syscall.S ============================================================
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* Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Chris Provenzano.
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* 4. The name of Chris Provenzano may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Description : Machine dependent syscalls for decstation with r2000/r3000
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*
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* 1.00 93/08/14 proven
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* -Started coding this file.
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*/
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.text
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.ascii "$Id$";
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#include <syscall.h>
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#include <machine/regdef.h>
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/*
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* Initial asm stuff for all functions.
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*/
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.text
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.align 2
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/* ==========================================================================
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* error code for all syscalls. The error value is returned as the negative
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* of the errno value. Eventually I want to load the errno value directly
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* into pthread_run->error but until then ...
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*/
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machdep_error:
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negu v0, v0 /* Return negative of errno value. */
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j ra
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/* ==========================================================================
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* Syscalls already done,
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* Standard Other important BSD sockets
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* fork = 2 select = 93 socket = 97
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* read = 3 readv = 120 connect = 98
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* write = 4 writev = 121 accept = 99
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* open = 5 getdirentries = send = 101
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* close = 6 recv = 102
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* creat = 8 bind = 104
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* link = 9 listen = 106
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* unlink = 10 recvmsg = 113
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* chdir = 12 sendmsg = 114
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* chmod = 15 getsockopt = 118
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* chown = 16 recvfrom = 125
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* lseek = 19 sendto = 133
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* stat = 38 shutdown = 134
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* dup = 41 getpeername = 141
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* pipe = 42
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* execve = 59
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* fstat = 62
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* wait3 = 84
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* dup2 = 90
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* fcntl = 92
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* fchown = 123
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* fchmod = 124
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* rename = 128
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* waitpid = 189
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* ======================================================================= */
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/* ==========================================================================
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* machdep_sys_fork()
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*/
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.globl machdep_sys_fork
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.ent machdep_sys_fork
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machdep_sys_fork:
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.frame sp,0,ra /* No frame, return address in ra */
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li v0,SYS_fork /* Load fork syscall # into v0 */
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syscall
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bne a3,zero,machdep_error /* Error if a3 != 0 */
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beqz v1,__fork_parent /* Second return value = 0, if parent */
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li v0,0
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__fork_parent:
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j ra
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.end machdep_sys_fork
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/* ==========================================================================
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* machdep_sys_pipe()
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*/
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.globl machdep_sys_pipe
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.ent machdep_sys_pipe
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machdep_sys_pipe:
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.frame sp,0,ra /* No frame, return address in ra */
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li v0,SYS_pipe /* Load pipe syscall # into v0 */
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syscall
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bne a3,zero,machdep_error /* Error if a3 != 0 */
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sw v0, 0(a0)
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sw v1, 4(a0)
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li v0, 0
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j ra
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.end machdep_sys_pipe
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/* ==========================================================================
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* Other important asm routines.
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* ======================================================================= */
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/* ==========================================================================
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* fake_setjmp()
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*/
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.globl fake_setjmp
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.ent fake_setjmp
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fake_setjmp:
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.frame sp,0,ra /* No frame, return address in ra */
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/* Save all the important registers */
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sw ra,8(a0)
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sw gp,124(a0)
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sw sp,128(a0)
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sw s0,76(a0)
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/* More registers needed. */
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j ra
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.end fake_longjmp
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/* ==========================================================================
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* machdep_sys_longjmp()
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*/
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.globl machdep_sys_longjmp
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.ent machdep_sys_longjmp
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machdep_sys_longjmp:
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.frame sp,0,ra /* No frame, return address in ra */
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li a1,1 /* Load 1 into reg a1 */
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sw a1, 20(a0); /* Load a1 into address a0 + 20 */
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li v0,SYS_sigreturn /* Load sigreturn syscall # into v0 */
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syscall /* Do syscall to do longjmp */
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j ra
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.end machdep_sys_longjmp
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