Add configure option to compile user targets as PIE
Build uset targers as true PIE if user want to keep qemu
self-virtualizable.
v5:
- Split into to patches: drop link hack and add PIE support
- do not build PIE by default and drop toolchain check
v4:
- Add test for toolchain if it has proper PIE support
v3:
- One more pice of the hack was removed
- Description updated
v2:
- Add configure options do enable/disable PIE for usermode targets.
Disabling can be useful if you build uswing toolchain which has
broken PIE support. PIE for usermode targets enabled by default.
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Blue Swirl <[email protected]>
diff --git a/configure b/configure
index cb1c29f..494e9ce 100755
--- a/configure
+++ b/configure
@@ -222,6 +222,7 @@
blobs="yes"
pkgversion=""
check_utests="no"
+user_pie="no"
# OS specific
if check_define __linux__ ; then
@@ -503,6 +504,10 @@
;;
--disable-guest-base) guest_base="no"
;;
+ --enable-user-pie) user_pie="yes"
+ ;;
+ --disable-user-pie) user_pie="no"
+ ;;
--enable-uname-release=*) uname_release="$optarg"
;;
--sparc_cpu=*)
@@ -683,6 +688,8 @@
echo " --enable-guest-base enable GUEST_BASE support for usermode"
echo " emulation targets"
echo " --disable-guest-base disable GUEST_BASE support"
+echo " --enable-user-pie build usermode emulation targets as PIE"
+echo " --disable-user-pie do not build usermode emulation targets as PIE"
echo " --fmod-lib path to FMOD library"
echo " --fmod-inc path to FMOD includes"
echo " --oss-lib path to OSS library"
@@ -1723,6 +1730,7 @@
echo "uname -r $uname_release"
echo "NPTL support $nptl"
echo "GUEST_BASE $guest_base"
+echo "PIE user targets $user_pie"
echo "vde support $vde"
echo "IO thread $io_thread"
echo "Linux AIO support $linux_aio"
@@ -2355,6 +2363,12 @@
esac
fi
+if test "$target_user_only" = "yes" -a "$static" = "no" -a \
+ "$user_pie" = "yes" ; then
+ cflags="-fpie $cflags"
+ ldflags="-pie $ldflags"
+fi
+
if test "$target_softmmu" = "yes" -a \( \
"$TARGET_ARCH" = "microblaze" -o \
"$TARGET_ARCH" = "cris" \) ; then
