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Comprehensive stack protector support was added to upstream glibc with
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this commit:
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commit cecbc7967f0bcac718b6f8f8942b58403c0e917c
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Author: Nick Alcock <nick.alcock@oracle.com>
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Date: Mon Dec 26 10:09:10 2016 +0100
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Enable -fstack-protector=* when requested by configure [BZ #7065]
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It is a superset of the functionality in this patch.
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diff -urN glibc-2.17-c758a686/config.make.in glibc-2.17-c758a686/config.make.in
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--- glibc-2.17-c758a686/config.make.in 2014-02-27 10:33:11.466763885 -0500
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+++ glibc-2.17-c758a686/config.make.in 2014-02-27 10:36:44.481320149 -0500
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@@ -62,6 +62,7 @@
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have-as-vis3 = @libc_cv_sparc_as_vis3@
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gnu89-inline-CFLAGS = @gnu89_inline@
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have-ssp = @libc_cv_ssp@
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+have-ssp-strong = @libc_cv_ssp_strong@
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have-selinux = @have_selinux@
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have-libaudit = @have_libaudit@
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have-libcap = @have_libcap@
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diff -urN glibc-2.17-c758a686/configure glibc-2.17-c758a686/configure
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--- glibc-2.17-c758a686/configure 2014-02-27 10:33:11.561763687 -0500
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+++ glibc-2.17-c758a686/configure 2014-02-27 10:32:28.885852593 -0500
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@@ -610,6 +610,7 @@
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libc_cv_cc_submachine
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exceptions
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gnu89_inline
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+libc_cv_ssp_strong
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libc_cv_ssp
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fno_unit_at_a_time
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libc_cv_output_format
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@@ -6758,6 +6759,27 @@
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$as_echo "$libc_cv_ssp" >&6; }
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector-strong" >&5
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+$as_echo_n "checking for -fstack-protector-strong... " >&6; }
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+if ${libc_cv_ssp_strong+:} false; then :
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+ $as_echo_n "(cached) " >&6
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+else
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+ if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector-strong -xc /dev/null -S -o /dev/null'
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+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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+ (eval $ac_try) 2>&5
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+ ac_status=$?
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+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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+ test $ac_status = 0; }; }; then :
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+ libc_cv_ssp_strong=yes
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+else
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+ libc_cv_ssp_strong=no
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+fi
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+
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+fi
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp_strong" >&5
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+$as_echo "$libc_cv_ssp_strong" >&6; }
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+
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+
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fgnu89-inline" >&5
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$as_echo_n "checking for -fgnu89-inline... " >&6; }
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if ${libc_cv_gnu89_inline+:} false; then :
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diff -urN glibc-2.17-c758a686/configure.in glibc-2.17-c758a686/configure.in
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--- glibc-2.17-c758a686/configure.in 2014-02-27 10:33:11.469763878 -0500
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+++ glibc-2.17-c758a686/configure.in 2014-02-27 10:32:09.171893663 -0500
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@@ -1682,6 +1682,13 @@
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])
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AC_SUBST(libc_cv_ssp)
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+AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl
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+LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong],
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+ [libc_cv_ssp_strong=yes],
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+ [libc_cv_ssp_strong=no])
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+])
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+AC_SUBST(libc_cv_ssp_strong)
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+
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AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
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cat > conftest.c <
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int foo;
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diff -urN glibc-2.17-c758a686/login/Makefile glibc-2.17-c758a686/login/Makefile
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--- glibc-2.17-c758a686/login/Makefile 2014-02-27 10:33:11.325764178 -0500
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+++ glibc-2.17-c758a686/login/Makefile 2014-02-27 10:35:30.785473661 -0500
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@@ -60,6 +60,9 @@
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ifeq (yes,$(have-ssp))
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pt_chown-cflags += -fstack-protector
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endif
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+ifeq (yes,$(have-ssp-strong))
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+pt_chown-cflags += -fstack-protector-strong
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+endif
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ifeq (yes,$(have-libcap))
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libcap = -lcap
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endif
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diff -urN glibc-2.17-c758a686/nscd/Makefile glibc-2.17-c758a686/nscd/Makefile
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--- glibc-2.17-c758a686/nscd/Makefile 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/nscd/Makefile 2014-02-27 10:36:00.017412769 -0500
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@@ -87,6 +87,9 @@
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ifeq (yes,$(have-ssp))
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CFLAGS-nonlib += -fstack-protector
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endif
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+ifeq (yes,$(have-ssp-strong))
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+CFLAGS-nonlib += -fstack-protector-strong
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+endif
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ifeq (yesyes,$(have-fpie)$(build-shared))
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LDFLAGS-nscd = -Wl,-z,now
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diff -urN glibc-2.17-c758a686/resolv/Makefile glibc-2.17-c758a686/resolv/Makefile
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--- glibc-2.17-c758a686/resolv/Makefile 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/resolv/Makefile 2014-02-27 10:36:29.449351461 -0500
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@@ -79,6 +79,10 @@
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ifeq (yes,$(have-ssp))
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CFLAGS-libresolv += -fstack-protector
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endif
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+ifeq (yes,$(have-ssp-strong))
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+CFLAGS-libresolv += -fstack-protector-strong
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+endif
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+
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CFLAGS-res_hconf.c = -fexceptions
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# The BIND code elicits some harmless warnings.
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