projects / unix-history / blame
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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 | * | |
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9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions | |
| 11 | * are met: | |
| 12 | * 1. Redistributions of source code must retain the above copyright | |
| 13 | * notice, this list of conditions and the following disclaimer. | |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 | * notice, this list of conditions and the following disclaimer in the | |
| 16 | * documentation and/or other materials provided with the distribution. | |
| 17 | * 3. All advertising materials mentioning features or use of this software | |
| 18 | * must display the following acknowledgement: | |
| 19 | * This product includes software developed by the University of | |
| 20 | * California, Berkeley and its contributors. | |
| 21 | * 4. Neither the name of the University nor the names of its contributors | |
| 22 | * may be used to endorse or promote products derived from this software | |
| 23 | * without specific prior written permission. | |
| 24 | * | |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 35 | * SUCH DAMAGE. | |
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36 | */ |
| 37 | ||
| 38 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 1c15e888 | 39 | .asciz "@(#)sigprocmask.s 5.2 (Berkeley) 6/6/90" |
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40 | #endif /* LIBC_SCCS and not lint */ |
| 41 | ||
| 42 | #include "SYS.h" | |
| 43 | ||
| b1965b2a | 44 | .even |
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45 | err: |
| 46 | jmp cerror | |
| 47 | ||
| 48 | ENTRY(sigprocmask) | |
| 49 | tstl sp@(8) /* check new sigset pointer */ | |
| 50 | jne gotptr /* if not null, indirect */ | |
| 51 | /* movl #0,sp@(8) /* null mask pointer: block empty set */ | |
| 52 | movl #1,sp@(4) /* SIG_BLOCK */ | |
| 53 | jra doit | |
| 54 | gotptr: | |
| 55 | movl sp@(8),a0 | |
| 56 | movl a0@,sp@(8) /* indirect to new mask arg */ | |
| 57 | doit: | |
| 58 | movl #SYS_sigprocmask,d0 | |
| 59 | trap #0 | |
| 60 | jcs err | |
| 61 | tstl sp@(12) /* test if old mask requested */ | |
| 62 | jeq out | |
| 63 | movl sp@(12),a0 | |
| 64 | movl d0,a0@ /* store old mask */ | |
| 65 | out: | |
| 66 | clrl d0 | |
| 67 | rts |