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Code Issues Releases Activity

Disable use of SSE instructions in Xorg's xf86SlowBcopy() function.

Browse Source 
When such instructions are used to copy data from/to mapped video
memory, some hypervisors (e.g. KVM, Microsoft Hyper-V) can generate
SIGILL or SIGBUS exceptions, causing Xorg to crash.

Reported by:	nogcjx@fastmail.fm
Approved by:	x11 (bapt)
PR:		202643
MFH:		2015Q3
This commit is contained in:
Dimitry Andric 2015-09-05 11:57:51 +00:00
parent a5db7d5da7
commit 6edde2ba50
Notes: svn2git 2021-03-31 03:12:20 +00:00 
svn path=/head/; revision=396167
2 changed files with 13 additions and 1 deletions
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2
x11-servers/xorg-server/Makefile
View File

@ -3,7 +3,7 @@
PORTNAME?= xorg-server
PORTVERSION= 1.14.7
PORTREVISION?= 5
PORTREVISION?= 6
PORTEPOCH?= 1
CATEGORIES= x11-servers
MASTER_SITES= XORG/individual/xserver

12
x11-servers/xorg-server/files/patch-Xserver-hw-xfree86-os-support-misc-Makefile.in Normal file
View File

@ -0,0 +1,12 @@
--- hw/xfree86/os-support/misc/Makefile.in.orig 2015-09-03 22:36:34.000000000 +0000
+++ hw/xfree86/os-support/misc/Makefile.in 2015-09-03 22:33:10.000000000 +0000
@@ -445,7 +445,8 @@ libmisc_la_SOURCES = SlowBcopy.c
#AM_LDFLAGS = -r
INCLUDES = $(XORG_INCS)
-AM_CFLAGS = $(XORG_CFLAGS) $(DIX_CFLAGS)
+@I386_VIDEO_TRUE@I386_VIDEO_CFLAGS = -mno-sse
+AM_CFLAGS = $(I386_VIDEO_CFLAGS) $(XORG_CFLAGS) $(DIX_CFLAGS)
EXTRA_DIST = $(I386_SRCS) $(PORTIO_SRCS)
all: all-am