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