diff mbox series

[v2,1/4] configure: Require PI_STATIC_AND_HIDDEN for static pie

Message ID 0025e4350c3001b6721552aa8d5bc64711d028b9.1610121077.git.szabolcs.nagy@arm.com
State New
Headers show
Series fix ifunc with static pie [BZ #27072] | expand

Commit Message

Szabolcs Nagy Jan. 8, 2021, 4:19 p.m. UTC 
The glibc static pie self relocation code relies on that local
symbols can be accessed without dynamic relocations in position
independent code.
---
 configure    | 14 ++++++++++++++
 configure.ac |  5 +++++
 2 files changed, 19 insertions(+)
diff mbox series

Patch

diff --git a/configure b/configure
index 6a35553805..e9d88f007c 100755
--- a/configure
+++ b/configure
@@ -6837,6 +6837,20 @@  if test "$static_pie" = yes; then
   if test "$libc_cv_no_dynamic_linker" != yes; then
     as_fn_error $? "linker support for --no-dynamic-linker needed" "$LINENO" 5
   fi
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef PI_STATIC_AND_HIDDEN
+# error static pie depends on PI_STATIC_AND_HIDDEN
+#endif
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  as_fn_error $? "the target does not support static pie" "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
   # Default to PIE.
   libc_cv_pie_default=yes
   $as_echo "#define ENABLE_STATIC_PIE 1" >>confdefs.h
diff --git a/configure.ac b/configure.ac
index 43cfac9d48..aead4c44d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1846,6 +1846,11 @@  if test "$static_pie" = yes; then
   if test "$libc_cv_no_dynamic_linker" != yes; then
     AC_MSG_ERROR([linker support for --no-dynamic-linker needed])
   fi
+
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifndef PI_STATIC_AND_HIDDEN
+# error static pie depends on PI_STATIC_AND_HIDDEN
+#endif]])], , AC_MSG_ERROR([the target does not support static pie]))
+
   # Default to PIE.
   libc_cv_pie_default=yes
   AC_DEFINE(ENABLE_STATIC_PIE)