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Annotation of sys/lib/libkern/arch/sparc64/SYS.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: SYS.h,v 1.3 2003/06/02 23:28:09 millert Exp $ */
                      2: /*     $NetBSD: SYS.h,v 1.2 1999/02/15 04:54:36 hubertf Exp $  */
                      3: /*-
                      4:  * Copyright (c) 1992, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This software was developed by the Computer Systems Engineering group
                      8:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
                      9:  * contributed to Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
                     35:  *     @(#)SYS.h       8.1 (Berkeley) 6/4/93
                     36:  *
                     37:  *     from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
                     38:  *     $Id: SYS.h,v 1.3 2003/06/02 23:28:09 millert Exp $
                     39:  */
                     40:
                     41: #include <machine/asm.h>
                     42: #include <sys/syscall.h>
                     43: #include <machine/trap.h>
                     44:
                     45: #ifdef __STDC__
                     46: #define _CAT(x,y) x##y
                     47: #else
                     48: #define _CAT(x,y) x/**/y
                     49: #endif
                     50:
                     51: /*
                     52:  * ERROR branches to cerror.  This is done with a macro so that I can
                     53:  * change it to be position independent later, if need be.
                     54:  */
                     55: #ifdef PIC
                     56: #define        ERROR() \
                     57:        PIC_PROLOGUE(%g1,%g2); \
                     58:        ld [%g1+cerror],%g2; jmp %g2; nop
                     59: #else
                     60: #define        ERROR() \
                     61:        sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
                     62: #endif
                     63:
                     64: /*
                     65:  * SYSCALL is used when further action must be taken before returning.
                     66:  * Note that it adds a `nop' over what we could do, if we only knew what
                     67:  * came at label 1....
                     68:  */
                     69: #define        SYSCALL(x) \
                     70:        ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
                     71:
                     72: /*
                     73:  * RSYSCALL is used when the system call should just return.  Here
                     74:  * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
                     75:  * and avoid a branch.
                     76:  */
                     77: #define        RSYSCALL(x) \
                     78:        ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
                     79:        t ST_SYSCALL; ERROR()
                     80:
                     81: /*
                     82:  * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
                     83:  */
                     84: #define        PSEUDO(x,y) \
                     85:        ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
                     86:        t ST_SYSCALL; ERROR()
                     87:
                     88: /*
                     89:  * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls
                     90:  * that never fail.
                     91:  *
                     92:  * XXX - This should be optimized.
                     93:  */
                     94: #define SYSCALL_NOERROR(x) \
                     95:        ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL
                     96:
                     97: /*
                     98:  * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls
                     99:  * that never fail.
                    100:  *
                    101:  * XXX - This should be optimized.
                    102:  */
                    103: #define RSYSCALL_NOERROR(x) \
                    104:        ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
                    105:        t ST_SYSCALL
                    106:
                    107:        .globl  cerror