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78 lines
2.9 KiB
ArmAsm
78 lines
2.9 KiB
ArmAsm
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/* ==== 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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#define SYSCALL(x) \
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\
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.globl machdep_sys_##x; \
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.ent machdep_sys_##x; \
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\
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machdep_sys_##x:; \
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\
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.frame sp,0,ra; /* No frame, return address in ra */ \
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\
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li v0,SYS_##x; /* Load 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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j ra; \
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\
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.end machdep_sys_##x
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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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#define XSYSCALL(NAME) SYSCALL(NAME)
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XSYSCALL(SYSCALL_NAME)
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