From: ceriel <none@none>
Date: Tue, 21 Feb 1989 10:49:51 +0000 (+0000)
Subject: improve signal handling of Floating Point Exception
X-Git-Tag: release-5-5~2561
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=b37c8b0b249cb913a7341dd0599f7922ae261aff;p=ack.git

improve signal handling of Floating Point Exception
---

diff --git a/mach/vax4/libbsd4_1a/head_em.s b/mach/vax4/libbsd4_1a/head_em.s
index a71233844..2608535e4 100644
--- a/mach/vax4/libbsd4_1a/head_em.s
+++ b/mach/vax4/libbsd4_1a/head_em.s
@@ -25,8 +25,8 @@ a2:
 	pushl	r0
 	pushl	r2
 	pushl	r1
-#	movl	$m1,ap
-#	chmk	(ap)+		# catch floating point exception
+	movl	$m1,ap
+	chmk	(ap)+		# catch floating point exception
 	calls	$3,_m_a_i_n
 	movl	$m2,ap
 	movl	r0,6(ap)
diff --git a/mach/vax4/libbsd4_2/head_em.s b/mach/vax4/libbsd4_2/head_em.s
index f162fba28..2c3fcfd6a 100644
--- a/mach/vax4/libbsd4_2/head_em.s
+++ b/mach/vax4/libbsd4_2/head_em.s
@@ -38,6 +38,13 @@ a2:
 sig8:
 	.word	0x0000
 	pushl	8(ap)
+	movl	$m3,ap
+	chmk	(ap)+		# restore default handler
+	movl	$m5,ap
+	chmk	(ap)+		# get current signal mask
+	andl3	d0,$0xffffff7f,m4+6	# and remove the 8th bit
+	movl	$m4,ap
+	chmk	(ap)+		# and 
 	movl	(sp)+,ap
 	pushl	tab [ap]
 	jsb	.trp
@@ -52,6 +59,20 @@ m1:
 	.long	8
 	.long	m1a
 	.long	0
+m3:
+	.word	SYS_sigvec
+	.long	3
+	.long	8
+	.long	0
+	.long	0
+m4:
+	.word	SYS_sigsetmask
+	.long	1
+	.long	0
+m5:
+	.word	SYS_sigblock
+	.long	1
+	.long	0
 m1a:
 	.long	sig8
 	.long	0