[patch] toolchain.eclass modifications to make it aware of gcc-4.x style native ssp support

toolchain.eclass.patch (text/plain), 3.44 KB, created by Christophe Saout on 2005-08-12 12:21:25 UTC

--- toolchain.eclass	2005-08-12 20:58:36.000000000 +0200
+++ www/saout/gentoo/gcc/testing/toolchain.eclass	2005-08-12 21:00:52.000000000 +0200
@@ -331,7 +331,9 @@
 		fi
 		return 1
 	elif [[ $1 == "ssp" ]] ; then
-		[[ -z ${PP_VER} ]] && return 1
+		if ! gcc_has_native_ssp ; then
+			[[ -z ${PP_VER} ]] && return 1
+		fi
 		hardened_gcc_is_stable ssp && return 0
 		if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
 			hardened_gcc_check_unsupported ssp && return 1
@@ -402,6 +404,16 @@
 	return 1
 }
 
+gcc_has_native_ssp() {
+	[[ ${GCCMAJOR} -lt 4 ]] && return 1
+
+	# gcc 4.1 and above have native ssp support
+	[[ ( ${GCCMAJOR} -gt 4 || ${GCCMINOR} -ge 1 ) ]] && return 0
+
+	# gcc 4.0 might have the gcc 4.1 ssp support backport applied
+	grep -q '^fstack-protector' ${S}/gcc/common.opt
+}
+
 has_libssp() {
 	[[ -e /$(get_libdir)/libssp.so ]] && return 0
 	return 1
@@ -422,7 +434,7 @@
 }
 want_boundschecking() { _want_stuff HTB_VER boundschecking ; }
 want_pie() { _want_stuff PIE_VER !nopie ; }
-want_ssp() { _want_stuff PP_VER !nossp ; }
+want_ssp() { gcc_has_native_ssp || _want_stuff PP_VER !nossp ; }
 
 want_split_specs() {
 	[[ ${SPLIT_SPECS} == "true" ]] && want_pie
@@ -455,18 +467,24 @@
 
 	local my_libc=${ROOT}/${libc_prefix}/${libc_file}
 
-	# Check for the libc to have the __guard symbols
-	if  [[ -n $(readelf -s "${my_libc}" 2>/dev/null | \
-	            grep 'OBJECT.*GLOBAL.*__guard') ]] && \
-	    [[ -n $(readelf -s "${my_libc}" 2>/dev/null | \
-	            grep 'FUNC.*GLOBAL.*__stack_smash_handler') ]]
-	then
+	if [[ ${GCCMAJOR} -ge 4 ]] ; then
+		# Check for the libc to have the __stack_chk symbols
+		[[ -n $(readelf -s "${my_libc}" 2>/dev/null | \
+		            grep 'FUNC.*GLOBAL.*__stack_chk_fail') ]] && \
 		return 0
-	elif is_crosscompile ; then
-		die "'${my_libc}' was detected w/out ssp, that sucks (a lot)"
 	else
-		return 1
+		# Check for the libc to have the __guard symbols
+		[[ -n $(readelf -s "${my_libc}" 2>/dev/null | \
+		        grep 'OBJECT.*GLOBAL.*__guard') ]] && \
+		[[ -n $(readelf -s "${my_libc}" 2>/dev/null | \
+		        grep 'FUNC.*GLOBAL.*__stack_smash_handler') ]] && \
+		return 0
 	fi
+
+	is_crosscompile && \
+		die "'${my_libc}' was detected w/out ssp, that sucks (a lot)"
+
+	return 1
 }
 
 # This is to make sure we don't accidentally try to enable support for a
@@ -1209,6 +1227,11 @@
 		BOOT_CFLAGS=${BOOT_CFLAGS-"$(get_abi_CFLAGS) ${CFLAGS}"}
 	fi
 
+	if S=${OLDS} gcc_has_native_ssp ; then
+		STAGE1_CFLAGS="${STAGE1_CFLAGS} -DTARGET_LIBC_PROVIDES_SSP"
+		BOOT_CFLAGS="${BOOT_CFLAGS} -DTARGET_LIBC_PROVIDES_SSP"
+	fi
+
 	pushd ${WORKDIR}/build
 	einfo "Running make LDFLAGS=\"${LDFLAGS}\" STAGE1_CFLAGS=\"${STAGE1_CFLAGS}\" LIBPATH=\"${LIBPATH}\" BOOT_CFLAGS=\"${BOOT_CFLAGS}\" ${GCC_MAKE_TARGET}"
 
@@ -1677,7 +1700,7 @@
 	[[ -n ${UCLIBC_VER} ]] && \
 		unpack ${PN}-${UCLIBC_GCC_VER}-uclibc-patches-${UCLIBC_VER}.tar.bz2
 
-	if want_ssp ; then
+	if want_ssp && ! gcc_has_native_ssp; then
 		if [[ -n ${PP_FVER} ]] ; then
 			# The gcc 3.4 propolice versions are meant to be unpacked to ${S}
 			pushd ${S:-$(gcc_get_s_dir)} > /dev/null
@@ -1758,6 +1781,14 @@
 
 # patch in ProPolice Stack Smashing protection
 do_gcc_SSP_patches() {
+	if gcc_has_native_ssp ; then
+		if [[ ${GCCMAJOR}.${GCCMINOR} == 4.0 ]] ; then
+			# Indicate that ssp support is a backport
+			release_version="${release_version}, ssp-4.1-backport"
+		fi
+		return 0
+	fi
+
 	# PARISC has no love ... it's our stack :(
 	if [[ $(tc-arch) == "hppa" ]] || \
 	   ! want_ssp || \