projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 95f4ed33 KB |
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 | * %sccs.include.redist.c% | |
| 10 | */ | |
| 11 | ||
| 12 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 13 | .asciz "@(#)sigprocmask.s 5.1 (Berkeley) %G%" | |
| 14 | #endif /* LIBC_SCCS and not lint */ | |
| 15 | ||
| 16 | #include "SYS.h" | |
| 17 | ||
| 18 | err: | |
| 19 | jmp cerror | |
| 20 | ||
| 21 | ENTRY(sigprocmask) | |
| 22 | tstl sp@(8) /* check new sigset pointer */ | |
| 23 | jne gotptr /* if not null, indirect */ | |
| 24 | /* movl #0,sp@(8) /* null mask pointer: block empty set */ | |
| 25 | movl #1,sp@(4) /* SIG_BLOCK */ | |
| 26 | jra doit | |
| 27 | gotptr: | |
| 28 | movl sp@(8),a0 | |
| 29 | movl a0@,sp@(8) /* indirect to new mask arg */ | |
| 30 | doit: | |
| 31 | movl #SYS_sigprocmask,d0 | |
| 32 | trap #0 | |
| 33 | jcs err | |
| 34 | tstl sp@(12) /* test if old mask requested */ | |
| 35 | jeq out | |
| 36 | movl sp@(12),a0 | |
| 37 | movl d0,a0@ /* store old mask */ | |
| 38 | out: | |
| 39 | clrl d0 | |
| 40 | rts |