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Use -march=i686 for x86 builds if -fcf-protection is detected (needs CMOV)

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Andrew John Hughes 2021-01-19 17:39:49 +00:00
parent 31af2fd707
commit b6e8960be7
2 changed files with 35 additions and 3 deletions
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11
java-latest-openjdk.spec
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@ -270,7 +270,7 @@
%global top_level_dir_name %{origin}
%global minorver 0
%global buildver 9
%global rpmrelease 9
%global rpmrelease 10
# priority must be 8 digits in total; up to openjdk 1.8, we were using 18..... so when we moved to 11, we had to add another digit
%if %is_system_jdk
%global priority %( printf '%02d%02d%02d%02d' %{majorver} %{minorver} %{securityver} %{buildver} )
@ -1116,7 +1116,8 @@ Patch3: rh649512-remove_uses_of_far_in_jpeg_libjpeg_turbo_1_4_compat_for_jdk1
Patch4: pr3183-rh1340845-support_fedora_rhel_system_crypto_policy.patch
# Depend on pcs-lite-libs instead of pcs-lite-devel as this is only in optional repo
Patch6: rh1684077-openjdk_should_depend_on_pcsc-lite-libs_instead_of_pcsc-lite-devel.patch
# JDK-8259949: Use i686 instead of i586 on x86 when -fcf-protection is passed to the compiler, as CMOV is needed
Patch8: jdk8259949-allow_cf-protection_on_x86.patch
#############################################
#
@ -1466,6 +1467,7 @@ pushd %{top_level_dir_name}
%patch3 -p1
%patch4 -p1
%patch6 -p1
%patch8 -p1
popd # openjdk
%patch1000
@ -2095,6 +2097,9 @@ require "copy_jdk_configs.lua"
%endif
%changelog
* Tue Jan 19 2021 Andrew Hughes <gnu.andrew@redhat.com> - 1:15.0.1.9-10.rolling
- Use -march=i686 for x86 builds if -fcf-protection is detected (needs CMOV)
* Tue Dec 22 2020 Jiri Vanek <jvanek@redhat.com> - 1:15.0.1.9-9.rolling
- fixed missing condition for fastdebug packages being counted as debug ones
@ -2117,7 +2122,7 @@ require "copy_jdk_configs.lua"
- patch600 rh1750419-redhat_alt_java.patch amended to die, if it is used wrongly
- introduced ssbd_arches with currently only valid arch of x86_64 to separate real alt-java architectures
* Wed Dec 7 2020 Jiri Vanek <jvanek@redhat.com> - 1:15.0.1.9-4.rolling
* Wed Dec 9 2020 Jiri Vanek <jvanek@redhat.com> - 1:15.0.1.9-4.rolling
- moved wrongly placed licenses to accompany other ones
- this bad placement was killng parallel-installability and thus having bad impact to leapp if used

27
jdk8259949-allow_cf-protection_on_x86.patch Normal file
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@ -0,0 +1,27 @@
diff --git openjdk.orig/make/autoconf/flags-cflags.m4 openjdk/make/autoconf/flags-cflags.m4
--- openjdk.orig/make/autoconf/flags-cflags.m4
+++ openjdk/make/autoconf/flags-cflags.m4
@@ -715,9 +715,21 @@
# CFLAGS PER CPU
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
# COMMON to gcc and clang
+ AC_MSG_CHECKING([if $1 is x86])
if test "x$FLAGS_CPU" = xx86; then
- # Force compatibility with i586 on 32 bit intel platforms.
- $1_CFLAGS_CPU="-march=i586"
+ AC_MSG_RESULT([yes])
+ AC_MSG_CHECKING([if control flow protection is enabled by additional compiler flags])
+ if echo "${EXTRA_CFLAGS}${EXTRA_CXXFLAGS}${EXTRA_ASFLAGS}" | ${GREP} -q 'fcf-protection' ; then
+ # cf-protection requires CMOV and thus i686
+ $1_CFLAGS_CPU="-march=i686"
+ AC_MSG_RESULT([yes, forcing ${$1_CFLAGS_CPU}])
+ else
+ # Force compatibility with i586 on 32 bit intel platforms.
+ $1_CFLAGS_CPU="-march=i586"
+ AC_MSG_RESULT([no, forcing ${$1_CFLAGS_CPU}])
+ fi
+ else
+ AC_MSG_RESULT([no])
fi
fi