/hg/icedtea8-forest/hotspot: 3 new changesets

[andrew at icedtea.classpath.org]

changeset 0458118b5f19 in /hg/icedtea8-forest/hotspot
details: http://icedtea.classpath.org/hg/icedtea8-forest/hotspot?cmd=changeset;node=0458118b5f19
author: andrew
date: Wed Aug 08 17:01:13 2018 +0100

	PR3607: CVE-2018-3639 hw: cpu: speculative store bypass mitigation


changeset 8c2fa81f07e2 in /hg/icedtea8-forest/hotspot
details: http://icedtea.classpath.org/hg/icedtea8-forest/hotspot?cmd=changeset;node=8c2fa81f07e2
author: andrew
date: Sat Aug 11 17:36:00 2018 +0100

	Added tag icedtea-3.9.0pre00 for changeset cb5711bf53d9


changeset 6f7d65e42104 in /hg/icedtea8-forest/hotspot
details: http://icedtea.classpath.org/hg/icedtea8-forest/hotspot?cmd=changeset;node=6f7d65e42104
author: andrew
date: Sun Aug 19 04:29:57 2018 +0100

	Added tag icedtea-3.9.0pre01 for changeset 0458118b5f19


diffstat:

 .hgtags                      |   2 ++
 src/os/linux/vm/os_linux.cpp |  27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)

diffs (53 lines):

diff -r 66087a86ded3 -r 6f7d65e42104 .hgtags
--- a/.hgtags	Wed Jul 25 14:53:59 2018 +0100
+++ b/.hgtags	Sun Aug 19 04:29:57 2018 +0100
@@ -1198,3 +1198,5 @@
 6d890180aeb43ee727b2f2cc0952ae0e1b8566c8 jdk8u171-b10
 7f6e1069a5719c8908b53774d3560ce851c7cd70 icedtea-3.8.0pre02
 cb5711bf53d9278904c1ee63630a5c82189cb09a icedtea-3.8.0
+cb5711bf53d9278904c1ee63630a5c82189cb09a icedtea-3.9.0pre00
+0458118b5f190097099f2ea7b025cb2d5aeb0429 icedtea-3.9.0pre01
diff -r 66087a86ded3 -r 6f7d65e42104 src/os/linux/vm/os_linux.cpp
--- a/src/os/linux/vm/os_linux.cpp	Wed Jul 25 14:53:59 2018 +0100
+++ b/src/os/linux/vm/os_linux.cpp	Sun Aug 19 04:29:57 2018 +0100
@@ -103,6 +103,8 @@
 # include <inttypes.h>
 # include <sys/ioctl.h>
 
+#include <sys/prctl.h>
+
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 
 #ifndef _GNU_SOURCE
@@ -4995,6 +4997,31 @@
   }
 }
 
+/* Per task speculation control */
+#ifndef PR_GET_SPECULATION_CTRL
+#define PR_GET_SPECULATION_CTRL    52
+#endif
+#ifndef PR_SET_SPECULATION_CTRL
+#define PR_SET_SPECULATION_CTRL    53
+#endif
+/* Speculation control variants */
+# undef PR_SPEC_STORE_BYPASS
+# define PR_SPEC_STORE_BYPASS          0
+/* Return and control values for PR_SET/GET_SPECULATION_CTRL */
+# undef PR_SPEC_NOT_AFFECTED
+# undef PR_SPEC_PRCTL
+# undef PR_SPEC_ENABLE
+# undef PR_SPEC_DISABLE
+# define PR_SPEC_NOT_AFFECTED          0
+# define PR_SPEC_PRCTL                 (1UL << 0)
+# define PR_SPEC_ENABLE                (1UL << 1)
+# define PR_SPEC_DISABLE               (1UL << 2)
+
+static void set_speculation() __attribute__((constructor));
+static void set_speculation() {
+  prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE, 0, 0);
+}
+
 // this is called _before_ the most of global arguments have been parsed
 void os::init(void) {
   char dummy;   /* used to get a guess on initial stack address */