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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* C library -- long syscall(int sysnum, ...);
* C library -- long __systemcall(sysret_t *, int sysnum, ...);
*
* Interpret a given system call
*
* This version handles up to 8 'long' arguments to a system call.
*
* Even though indirect system call support exists in the SPARC
* 32-bit kernel, we want to eliminate it in a future release,
* so the real trap for the desired system call is issued right here.
*
* Even though %g5 can be used as a scratch register for sparcv9, we don't
* use it here because this code is shared between sparcv8 and sparcv9.
*/
.file "syscall.s"
#include "SYS.h"
ANSI_PRAGMA_WEAK(syscall,function)
ENTRY(syscall)
save %sp, -SA(MINFRAME + 2*CLONGSIZE), %sp
ldn [%fp + STACK_BIAS + MINFRAME], %o5 ! arg 5
mov %i3, %o2 ! arg 2
ldn [%fp + STACK_BIAS + MINFRAME + CLONGSIZE], %g1
mov %i4, %o3 ! arg 3
stn %g1, [%sp + STACK_BIAS + MINFRAME] ! arg 6
mov %i5, %o4 ! arg 4
ldn [%fp + STACK_BIAS + MINFRAME + 2*CLONGSIZE], %g1
mov %i1, %o0 ! arg 0
stn %g1, [%sp + STACK_BIAS + MINFRAME + CLONGSIZE] ! arg 7
mov %i2, %o1 ! arg 1
mov %i0, %g1 ! sysnum
ta SYSCALL_TRAPNUM
bcc,a,pt %icc, 1f
sra %o0, 0, %i0 ! (int) cast
restore %o0, 0, %o0
ba __cerror
nop
1:
ret
restore
SET_SIZE(syscall)
/*
* Same as _syscall(), but restricted to 6 syscall arguments
* so it doesn't need to incur the overhead of a register window.
* Implemented for use only within libc; symbol is not exported.
*/
ENTRY(_syscall6)
mov %o0, %g1 /* sysnum */
mov %o1, %o0 /* syscall args */
mov %o2, %o1
mov %o3, %o2
mov %o4, %o3
mov %o5, %o4
ldn [%sp + STACK_BIAS + MINFRAME], %o5
ta SYSCALL_TRAPNUM
SYSCERROR
retl
sra %o0, 0, %o0 /* (int) cast */
SET_SIZE(_syscall6)
ENTRY(__systemcall)
save %sp, -SA(MINFRAME + 2*CLONGSIZE), %sp
ldn [%fp + STACK_BIAS + MINFRAME], %o4 ! arg 4
mov %i3, %o1 ! arg 1
ldn [%fp + STACK_BIAS + MINFRAME + CLONGSIZE], %o5 ! arg5
mov %i4, %o2 ! arg 2
ldn [%fp + STACK_BIAS + MINFRAME + 2*CLONGSIZE], %g1
mov %i5, %o3 ! arg 3
stn %g1, [%sp + STACK_BIAS + MINFRAME] ! arg 6
mov %i2, %o0 ! arg 0
ldn [%fp + STACK_BIAS + MINFRAME + 3*CLONGSIZE], %g1
stn %g1, [%sp + STACK_BIAS + MINFRAME + CLONGSIZE] ! arg7
mov %i1, %g1 ! sysnum
ta SYSCALL_TRAPNUM
bcc,pt %icc, 1f
mov -1, %g1
stn %g1, [%i0] /* error */
ba 2f
stn %g1, [%i0 + CLONGSIZE]
1:
stn %o0, [%i0] /* no error */
clr %o0
stn %o1, [%i0 + CLONGSIZE]
2:
ret
restore %o0, 0, %o0
SET_SIZE(__systemcall)
/*
* Same as __systemcall(), but restricted to 6 syscall arguments
* so it doesn't need to incur the overhead of a register window.
* Implemented for use only within libc; symbol is not exported.
*/
ENTRY(__systemcall6)
stn %o0, [%sp + SAVE_OFFSET] /* sysret address */
mov %o1, %g1 /* sysnum */
mov %o2, %o0 /* syscall args */
mov %o3, %o1
mov %o4, %o2
mov %o5, %o3
ldn [%sp + STACK_BIAS + MINFRAME], %o4
ldn [%sp + STACK_BIAS + MINFRAME + CLONGSIZE], %o5
ta SYSCALL_TRAPNUM
bcs,pn %icc, 1f
ldn [%sp + SAVE_OFFSET], %g1
stn %o0, [%g1] /* no error */
stn %o1, [%g1 + CLONGSIZE]
retl
clr %o0
1:
mov -1, %o1 /* error */
stn %o1, [%g1]
retl
stn %o1, [%g1 + CLONGSIZE]
SET_SIZE(__systemcall6)
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