projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c5c85c22 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 | * William Jolitz. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | */ | |
| 10 | ||
| 11 | #if defined(SYSLIBC_SCCS) && !defined(lint) | |
| 2f996b04 | 12 | .asciz "@(#)sigprocmask.s 5.2 (Berkeley) %G%" |
| c5c85c22 KB |
13 | #endif /* SYSLIBC_SCCS and not lint */ |
| 14 | ||
| 15 | #include "SYS.h" | |
| 16 | ||
| 17 | err: | |
| 18 | jmp cerror | |
| 19 | ||
| 20 | ENTRY(sigprocmask) | |
| 21 | movl 8(%esp),%ecx # fetch new sigset pointer | |
| 2f996b04 | 22 | cmpl $0,%ecx # check new sigset pointer |
| c5c85c22 KB |
23 | jne 1f # if not null, indirect |
| 24 | /* movl $0,8(%esp) # null mask pointer: block empty set */ | |
| 25 | movl $1,4(%esp) # SIG_BLOCK | |
| 26 | jmp 2f | |
| 27 | 1: movl (%ecx),%ecx # fetch indirect ... | |
| 28 | movl %ecx,8(%esp) # to new mask arg | |
| 29 | 2: movl $ SYS_sigprocmask , %eax | |
| 30 | LCALL(0x7,0) | |
| 31 | jb err | |
| 32 | movl 12(%esp),%ecx # fetch old mask requested | |
| 33 | cmpl $0,%ecx # test if old mask requested | |
| 34 | je out | |
| 35 | movl %eax,(%ecx) # store old mask | |
| 36 | out: | |
| 37 | xorl %eax,%eax | |
| 38 | ret |