118 lines
4.1 KiB
Diff
118 lines
4.1 KiB
Diff
diff --git openjdk.orig/make/modules/java.base/Launcher.gmk openjdk/make/modules/java.base/Launcher.gmk
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index 700ddefda49..2882de68eb2 100644
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--- openjdk.orig/make/modules/java.base/Launcher.gmk
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+++ openjdk/make/modules/java.base/Launcher.gmk
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@@ -41,6 +41,14 @@ $(eval $(call SetupBuildLauncher, java, \
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OPTIMIZATION := HIGH, \
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))
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+#Wno-error=cpp is present to allow commented warning in ifdef part of main.c
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+$(eval $(call SetupBuildLauncher, alt-java, \
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+ CFLAGS := -DEXPAND_CLASSPATH_WILDCARDS -DENABLE_ARG_FILES -DREDHAT_ALT_JAVA -Wno-error=cpp, \
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+ EXTRA_RCFLAGS := $(JAVA_RCFLAGS), \
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+ VERSION_INFO_RESOURCE := $(JAVA_VERSION_INFO_RESOURCE), \
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+ OPTIMIZATION := HIGH, \
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+))
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+
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ifeq ($(call isTargetOs, windows), true)
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$(eval $(call SetupBuildLauncher, javaw, \
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CFLAGS := -DJAVAW -DEXPAND_CLASSPATH_WILDCARDS -DENABLE_ARG_FILES, \
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diff --git openjdk.orig/src/java.base/share/native/launcher/alt_main.h openjdk/src/java.base/share/native/launcher/alt_main.h
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new file mode 100644
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index 00000000000..697df2898ac
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--- /dev/null
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+++ openjdk/src/java.base/share/native/launcher/alt_main.h
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@@ -0,0 +1,73 @@
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+/*
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+ * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
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+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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+ *
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+ * This code is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 only, as
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+ * published by the Free Software Foundation. Oracle designates this
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+ * particular file as subject to the "Classpath" exception as provided
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+ * by Oracle in the LICENSE file that accompanied this code.
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+ *
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+ * This code is distributed in the hope that it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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+ * version 2 for more details (a copy is included in the LICENSE file that
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+ * accompanied this code).
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+ *
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+ * You should have received a copy of the GNU General Public License version
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+ * 2 along with this work; if not, write to the Free Software Foundation,
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+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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+ *
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+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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+ * or visit www.oracle.com if you need additional information or have any
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+ * questions.
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+ */
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+
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+#ifdef REDHAT_ALT_JAVA
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+
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+#include <sys/prctl.h>
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+
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+
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+/* Per task speculation control */
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+#ifndef PR_GET_SPECULATION_CTRL
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+# define PR_GET_SPECULATION_CTRL 52
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+#endif
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+#ifndef PR_SET_SPECULATION_CTRL
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+# define PR_SET_SPECULATION_CTRL 53
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+#endif
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+/* Speculation control variants */
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+#ifndef PR_SPEC_STORE_BYPASS
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+# define PR_SPEC_STORE_BYPASS 0
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+#endif
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+/* Return and control values for PR_SET/GET_SPECULATION_CTRL */
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+
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+#ifndef PR_SPEC_NOT_AFFECTED
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+# define PR_SPEC_NOT_AFFECTED 0
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+#endif
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+#ifndef PR_SPEC_PRCTL
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+# define PR_SPEC_PRCTL (1UL << 0)
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+#endif
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+#ifndef PR_SPEC_ENABLE
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+# define PR_SPEC_ENABLE (1UL << 1)
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+#endif
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+#ifndef PR_SPEC_DISABLE
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+# define PR_SPEC_DISABLE (1UL << 2)
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+#endif
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+#ifndef PR_SPEC_FORCE_DISABLE
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+# define PR_SPEC_FORCE_DISABLE (1UL << 3)
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+#endif
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+#ifndef PR_SPEC_DISABLE_NOEXEC
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+# define PR_SPEC_DISABLE_NOEXEC (1UL << 4)
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+#endif
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+
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+static void set_speculation() __attribute__((constructor));
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+static void set_speculation() {
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+ if ( prctl(PR_SET_SPECULATION_CTRL,
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+ PR_SPEC_STORE_BYPASS,
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+ PR_SPEC_DISABLE_NOEXEC, 0, 0) == 0 ) {
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+ return;
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+ }
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+ prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE, 0, 0);
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+}
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+
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+#endif // REDHAT_ALT_JAVA
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diff --git openjdk.orig/src/java.base/share/native/launcher/main.c openjdk/src/java.base/share/native/launcher/main.c
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index b734fe2ba78..79dc8307650 100644
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--- openjdk.orig/src/java.base/share/native/launcher/main.c
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+++ openjdk/src/java.base/share/native/launcher/main.c
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@@ -34,6 +34,14 @@
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#include "jli_util.h"
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#include "jni.h"
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+#ifdef REDHAT_ALT_JAVA
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+#if defined(__linux__) && defined(__x86_64__)
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+#include "alt_main.h"
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+#else
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+#warning alt-java requested but SSB mitigation not available on this platform.
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+#endif
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+#endif
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+
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#ifdef _MSC_VER
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#if _MSC_VER > 1400 && _MSC_VER < 1600
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