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Annotation of 43BSDReno/lib/libc/hp300/sys/sigprocmask.s, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * the Systems Programming Group of the University of Utah Computer
        !             7:  * Science Department.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms are permitted provided
        !            10:  * that: (1) source distributions retain this entire copyright notice and
        !            11:  * comment, and (2) distributions including binaries display the following
        !            12:  * acknowledgement:  ``This product includes software developed by the
        !            13:  * University of California, Berkeley and its contributors'' in the
        !            14:  * documentation or other materials provided with the distribution and in
        !            15:  * all advertising materials mentioning features or use of this software.
        !            16:  * Neither the name of the University nor the names of its contributors may
        !            17:  * be used to endorse or promote products derived from this software without
        !            18:  * specific prior written permission.
        !            19:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            20:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            21:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            22:  */
        !            23: 
        !            24: #if defined(LIBC_SCCS) && !defined(lint)
        !            25:        .asciz "@(#)sigprocmask.s       5.2 (Berkeley) 6/6/90"
        !            26: #endif /* LIBC_SCCS and not lint */
        !            27: 
        !            28: #include "SYS.h"
        !            29: 
        !            30:        .even
        !            31: err:
        !            32:        jmp     cerror
        !            33: 
        !            34: ENTRY(sigprocmask)
        !            35:        tstl    sp@(8)                  /* check new sigset pointer */
        !            36:        jne     gotptr                  /* if not null, indirect */
        !            37: /*     movl    #0,sp@(8)               /* null mask pointer: block empty set */
        !            38:        movl    #1,sp@(4)               /* SIG_BLOCK */
        !            39:        jra     doit
        !            40: gotptr:
        !            41:        movl    sp@(8),a0
        !            42:        movl    a0@,sp@(8)              /* indirect to new mask arg */
        !            43: doit:
        !            44:        movl    #SYS_sigprocmask,d0
        !            45:        trap    #0
        !            46:        jcs     err
        !            47:        tstl    sp@(12)                 /* test if old mask requested */
        !            48:        jeq     out
        !            49:        movl    sp@(12),a0
        !            50:        movl    d0,a0@                  /* store old mask */
        !            51: out:
        !            52:        clrl    d0
        !            53:        rts

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