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author | Alexey Neyman <stilor@att.net> | 2020-01-31 08:57:45 (GMT) |
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committer | Alexey Neyman <stilor@att.net> | 2020-02-04 00:12:38 (GMT) |
commit | d35d2672782e682e8ef56e0e3a8f2bd5d9728fa5 (patch) | |
tree | 85044186b65e96821c7e5c01d7be0b0fada06fd3 /packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch | |
parent | e503877f8a3cbbb56eeae3ba121aedd227bd67fc (diff) |
Upstrean fix for CET-enabled compiler with no --enable-cet
Signed-off-by: Alexey Neyman <stilor@att.net>
Diffstat (limited to 'packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch')
-rw-r--r-- | packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch b/packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch new file mode 100644 index 0000000..b3c82e1 --- /dev/null +++ b/packages/glibc/2.28/0001-x86-Assume-enable-cet-if-GCC-defaults-to-CET-BZ-2522.patch @@ -0,0 +1,82 @@ +From 9f917f7b411c307c34eb1bae85d72ffe26167523 Mon Sep 17 00:00:00 2001 +From: Florian Weimer <fweimer@redhat.com> +Date: Tue, 3 Dec 2019 21:11:32 +0100 +Subject: [PATCH] x86: Assume --enable-cet if GCC defaults to CET [BZ #25225] + +This links in CET support if GCC defaults to CET. Otherwise, __CET__ +is defined, yet CET functionality is not compiled and linked into the +dynamic loader, resulting in a linker failure due to undefined +references to _dl_cet_check and _dl_open_check. + +(cherry picked from commit 9fb8139079ef0bb1aa33a4ae418cbb113b9b9da7) +--- + NEWS | 1 + + configure | 23 ++++++++++++++++++++++- + configure.ac | 9 ++++++++- + 3 files changed, 31 insertions(+), 2 deletions(-) + +diff --git a/configure b/configure +index fde57d63fe..c02753c0fe 100755 +--- a/configure ++++ b/configure +@@ -3762,11 +3762,32 @@ else + fi + + ++cat confdefs.h - <<_ACEOF >conftest.$ac_ext ++/* end confdefs.h. */ ++ ++int ++main () ++{ ++ ++#ifndef __CET__ ++#error no CET compiler support ++#endif ++ ; ++ return 0; ++} ++_ACEOF ++if ac_fn_c_try_compile "$LINENO"; then : ++ libc_cv_compiler_default_cet=yes ++else ++ libc_cv_compiler_default_cet=no ++fi ++rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext ++ + # Check whether --enable-cet was given. + if test "${enable_cet+set}" = set; then : + enableval=$enable_cet; enable_cet=$enableval + else +- enable_cet=no ++ enable_cet=$libc_cv_compiler_default_cet + fi + + +diff --git a/configure.ac b/configure.ac +index 014e09a5d5..139554b94a 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -464,11 +464,18 @@ AC_ARG_ENABLE([mathvec], + [build_mathvec=$enableval], + [build_mathvec=notset]) + ++AC_TRY_COMPILE([], [ ++#ifndef __CET__ ++# error no CET compiler support ++#endif], ++ [libc_cv_compiler_default_cet=yes], ++ [libc_cv_compiler_default_cet=no]) ++ + AC_ARG_ENABLE([cet], + AC_HELP_STRING([--enable-cet], + [enable Intel Control-flow Enforcement Technology (CET), x86 only]), + [enable_cet=$enableval], +- [enable_cet=no]) ++ [enable_cet=$libc_cv_compiler_default_cet]) + + # We keep the original values in `$config_*' and never modify them, so we + # can write them unchanged into config.make. Everything else uses +-- +2.20.1 + |