lib/libc/pc532/sys/sigprocmask.s

   1 /*
   2  * Copyright (c) 1992 Helsinki University of Technology
   3  * All Rights Reserved.
   4  *
   5  * Permission to use, copy, modify and distribute this software and its
   6  * documentation is hereby granted, provided that both the copyright
   7  * notice and this permission notice appear in all copies of the
   8  * software, derivative works or modified versions, and any portions
   9  * thereof, and that both notices appear in supporting documentation.
  10  *
  11  * HELSINKI UNIVERSITY OF TECHNOLOGY ALLOWS FREE USE OF THIS SOFTWARE IN
  12  * ITS "AS IS" CONDITION. HELSINKI UNIVERSITY OF TECHNOLOGY DISCLAIMS ANY
  13  * LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
  14  * USE OF THIS SOFTWARE.
  15  */
  16 /*
  17  * HISTORY
  18  * 29-Apr-92  Johannes Helander (jvh) at Helsinki University of Technology
  19  *      Created.
  20  *
  21  *      $Id: sigprocmask.s,v 1.1 1993/09/17 18:43:50 phil Exp $
  22  */
  23
  24 /*
  25  * Note: Has never been tested. Debug before use.
  26  */
  27
  28
  29 #include <sys/syscall.h>
  30 #include "SYS.h"
  31
  32 ENTRY(sigprocmask)
  33         movd    S_ARG1, r1              /* fetch new sigset pointer */
  34         cmpqd   0, r1                   /* check new sigset pointer */
  35         bne     L1                      /* if not null, indirect */
  36 /*      movqd   0, S_ARG1               /* null mask pointer: block empty set */
  37         movqd   1, S_ARG0               /* SIG_BLOCK */
  38         br      L2
  39 L1:     movd    0(r1), r1               /* fetch indirect  ... */
  40         movd    r1, S_ARG1              /* to new mask arg */
  41 L2:     movd    SYS_sigprocmask, r0
  42         SVC
  43         bcs     cerror
  44         movd    S_ARG2, r1              /* fetch old mask requested */
  45         cmpqd   0, r1                   /* test if old mask requested */
  46         beq     out
  47         movd    r0, 0(r1)               /* store old mask */
  48 out:
  49         movqd   0, r0
  50         ret     0