syscall-r2000-ultrix-4.2.S
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:5k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* ==== 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