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|
2011-06-24 Magnus Granberg <zorry@gentoo.org>
* configure Add --enable-espf. Add -fno-stack-protector
to stage1_cflags.
* gcc/configure.ac Add --enable-espf and checks for it.
--- a/configure.ac 2011-04-18 23:27:00.000000000 +0200
+++ b/configure.ac 2011-04-27 12:47:11.351473240 +0200
@@ -419,6 +419,25 @@
noconfigdirs="$noconfigdirs gnattools"
fi
+# Check whether --enable-espf was given and target have the support.
+AC_ARG_ENABLE([espf],
+[AS_HELP_STRING([--enable-espf],
+ [Enable Stack protector, Position independent executable and
+ Fortify_sources as default if we have suppot for it when compiling
+ and link with -z relro and -z now as default.
+ Linux targets supported x86_64.])],
+[
+ case $target in
+ x86_64*-*-linux*)
+ enable_espf=yes
+ ;;
+ *)
+ AC_MSG_WARN([*** --enable-espf is not supported on this $target target.])
+ ;;
+ esac
+])
+AC_SUBST([enable_espf])
+
AC_ARG_ENABLE(libssp,
[AS_HELP_STRING([--enable-libssp], [build libssp directory])],
ENABLE_LIBSSP=$enableval,
@@ -3152,6 +3171,10 @@
esac ;;
esac
+# Disable -fstack-protector on stage1
+if test x$enable_espf = xyes; then
+ stage1_cflags="$stage1_cflags -fno-stack-protector"
+fi
# This is aimed to mimic bootstrap with a non-GCC compiler to catch problems.
if test "$GCC" = yes -a "$ENABLE_BUILD_WITH_CXX" != yes; then
saved_CFLAGS="$CFLAGS"
--- a/gcc/configure.ac 2011-04-13 19:12:53.000000000 +0200
+++ b/gcc/configure.ac 2011-06-24 03:17:07.448179335 +0200
@@ -4515,6 +4515,145 @@
AC_SUBST(MAINT)dnl
# --------------
+# Espf checks
+# --------------
+
+# Check whether --enable-espf was given and target have the support.
+AC_ARG_ENABLE([espf],
+[AS_HELP_STRING([--enable-espf],
+ [Enable Stack protector, Position independent executable and
+ Fortify_sources as default if we have suppot for it when compiling
+ and link with -z relro and -z now as default.
+ Linux targets supported x86_64])],
+ set_enable_espf=$enableval,
+ set_enable_espf=no)
+if test $set_enable_espf = yes ; then
+ AC_MSG_CHECKING(if $target support espf)
+if test $set_enable_espf = yes ; then
+ case "$target" in
+ ?86-*-linux* | x86_64-*-linux*)
+ enable_espf=yes
+ AC_DEFINE(ENABLE_ESPF, 1,
+ [Define if your target support espf and you have enable it.])
+ ;;
+ *)
+ enable_espf=no
+ ;;
+ esac
+else
+ enable_espf=no
+fi
+AC_MSG_RESULT($enable_espf)
+fi
+AC_SUBST([enable_espf])
+if test $enable_espf = yes ; then
+
+ AC_CACHE_CHECK(linker -z relro support,
+ gcc_cv_ld_relro,
+ [gcc_cv_ld_relro=no
+ if test $in_tree_ld = yes ; then
+ if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
+ && test $in_tree_ld_is_elf = yes; then
+ gcc_cv_ld_relro=yes
+ fi
+ elif test x$gcc_cv_ld != x; then
+ # Check if linker supports -z relro options
+ if $gcc_cv_ld --help 2>/dev/null | grep now > /dev/null; then
+ gcc_cv_ld_relro=yes
+ fi
+ fi
+ ])
+
+ AC_CACHE_CHECK(linker -z now support,
+ gcc_cv_ld_now,
+ [gcc_cv_ld_now=no
+ if test $in_tree_ld = yes ; then
+ if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
+ && test $in_tree_ld_is_elf = yes; then
+ gcc_cv_ld_now=yes
+ fi
+ elif test x$gcc_cv_ld != x; then
+ # Check if linker supports -z now options
+ if $gcc_cv_ld --help 2>/dev/null | grep now > /dev/null; then
+ gcc_cv_ld_now=yes
+ fi
+ fi
+ ])
+
+# Check for FORTIFY_SOURCES support in target C library.
+AC_CACHE_CHECK(for _FORTIFY_SOURCES support in target C library,
+ gcc_cv_libc_provides_fortify,
+ [gcc_cv_libc_provides_fortify=no
+ case "$target" in
+ *-*-linux*)
+ [# glibc 2.8 and later provides _FORTIFY_SOURCES.
+ if test -f $target_header_dir/features.h; then
+ if $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+2' \
+ $target_header_dir/features.h > /dev/null \
+ && $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[8-9])' \
+ $target_header_dir/features.h > /dev/null; then
+ gcc_cv_libc_provides_fortify=yes
+ elif $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]' \
+ $target_header_dir/features.h > /dev/null ; then
+ gcc_cv_libc_provides_fortify=no
+ fi
+ fi]
+ ;;
+ *) gcc_cv_libc_provides_fortify=no ;;
+ esac])
+
+ AC_MSG_CHECKING(if the compiler default to use -fPIE and link with -pie)
+ if test $set_enable_espf = yes && test x"$gcc_cv_ld_pie" = xyes; then
+ enable_espf_pie=yes
+ AC_DEFINE(ENABLE_ESPF_PIE, 1,
+ [Define if your compiler will default to use -fPIE and link with -pie.])
+ else
+ enable_espf_pie=no
+ fi
+ AC_MSG_RESULT($enable_espf_pie)
+AC_MSG_CHECKING(if the compiler default to use -fstack-protector)
+ if test $set_enable_espf = yes && test x$gcc_cv_libc_provides_ssp = xyes \
+ && test $set_have_as_tls = yes ; then
+ enable_espf_ssp=yes
+ AC_DEFINE(ENABLE_ESPF_SSP, 1,
+ [Define if your compiler will default to use -fstack-protector.])
+ else
+ enable_espf_ssp=no
+ fi
+ AC_MSG_RESULT($enable_espf_ssp)
+
+AC_MSG_CHECKING(if the compiler default to use -D_FORTIFY_SOURCES=2)
+ if test $set_enable_espf = yes && test x$gcc_cv_libc_provides_fortify = xyes; then
+ enable_espf_fortify=yes
+ AC_DEFINE(ENABLE_ESPF_FORTIFY, 1,
+ [Define if your compiler will default to use -D_FORTIFY_SOURCES=2.])
+ else
+ enable_espf_fortify=no
+ fi
+ AC_MSG_RESULT($enable_espf_fortify)
+
+ AC_MSG_CHECKING(if the compiler will pass -z relro to the linker)
+ if test $set_enable_espf = yes && test x$gcc_cv_ld_relro = xyes; then
+ enable_espf_relro=yes
+ AC_DEFINE(ENABLE_ESPF_RELRO, 1,
+ [Define if your compiler will pass -z relro to the linker.])
+ else
+ enable_espf_relro=no
+ fi
+ AC_MSG_RESULT($enable_espf_relro)
+
+ AC_MSG_CHECKING(if the compiler will pass -z now to the linker)
+ if test $set_enable_espf = yes && test x$gcc_cv_ld_now = xyes; then
+ enable_espf_now=yes
+ AC_DEFINE(ENABLE_ESPF_NOW, 1,
+ [Define if your compiler will pass -z now to the linker.])
+ else
+ enable_espf_now=no
+ fi
+ AC_MSG_RESULT($enable_espf_now)
+fi
+
+# --------------
# Language hooks
# --------------
|
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