date and time created 90/07/01 00:05:56 by bostic

SCCS-vsn: lib/libc/i386/sys/sigprocmask.s 5.1

diff --git a/usr/src/lib/libc/i386/sys/sigprocmask.s b/usr/src/lib/libc/i386/sys/sigprocmask.s
new file mode 100644 (file)
index 0000000..ba5341d
--- /dev/null
+++ b/usr/src/lib/libc/i386/sys/sigprocmask.s
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * %sccs.include.redist.c%
+ */
+
+#if defined(SYSLIBC_SCCS) && !defined(lint)
+       .asciz "@(#)sigprocmask.s       5.1 (Berkeley) %G%"
+#endif /* SYSLIBC_SCCS and not lint */
+
+#include "SYS.h"
+
+err:
+       jmp     cerror
+
+ENTRY(sigprocmask)
+       movl    8(%esp),%ecx            # fetch new sigset pointer
+       cmpl    $0,(%ecx)               # check new sigset pointer
+       jne     1f                      # if not null, indirect
+/*     movl    $0,8(%esp)              # null mask pointer: block empty set */
+       movl    $1,4(%esp)              # SIG_BLOCK
+       jmp     2f
+1:     movl    (%ecx),%ecx             # fetch indirect  ...
+       movl    %ecx,8(%esp)            # to new mask arg
+2:     movl    $ SYS_sigprocmask , %eax
+       LCALL(0x7,0)
+       jb      err
+       movl    12(%esp),%ecx           # fetch old mask requested
+       cmpl    $0,%ecx                 # test if old mask requested
+       je      out
+       movl    %eax,(%ecx)             # store old mask
+out:
+       xorl    %eax,%eax
+       ret