[ARM/FDPIC,05/21,ARM] FDPIC: Fix __do_global_dtors_aux and frame_dummy generation

Message ID 20180525080354.13295-6-christophe.lyon@st.com
State Superseded
Headers show
Series
  • FDPIC ARM for ARM
Related show

Commit Message

Christophe Lyon May 25, 2018, 8:03 a.m.
In FDPIC, we need to make sure __do_global_dtors_aux and frame_dummy
are referenced by their address, not by pointers to the function
descriptors.

2018-XX-XX  Christophe Lyon  <christophe.lyon@st.com>
	Mickaël Guêné <mickael.guene@st.com>

	* libgcc/crtstuff.c: Add support for FDPIC.

Change-Id: Iff3aec3815e8ebd87276c0107752f00908a22100

-- 
2.6.3

Patch

diff --git a/libgcc/crtstuff.c b/libgcc/crtstuff.c
index 5e89445..7238d9a 100644
--- a/libgcc/crtstuff.c
+++ b/libgcc/crtstuff.c
@@ -432,9 +432,17 @@  __do_global_dtors_aux (void)
 #ifdef FINI_SECTION_ASM_OP
 CRT_CALL_STATIC_FUNCTION (FINI_SECTION_ASM_OP, __do_global_dtors_aux)
 #elif defined (FINI_ARRAY_SECTION_ASM_OP)
+#if defined(__FDPIC__)
+__asm__(
+    "   .section .fini_array\n"
+    "   .word __do_global_dtors_aux\n"
+);
+asm (TEXT_SECTION_ASM_OP);
+#else /* defined(__FDPIC__) */
 static func_ptr __do_global_dtors_aux_fini_array_entry[]
   __attribute__ ((__used__, section(".fini_array"), aligned(sizeof(func_ptr))))
   = { __do_global_dtors_aux };
+#endif /* defined(__FDPIC__) */
 #else /* !FINI_SECTION_ASM_OP && !FINI_ARRAY_SECTION_ASM_OP */
 static void __attribute__((used))
 __do_global_dtors_aux_1 (void)
@@ -476,9 +484,17 @@  frame_dummy (void)
 #ifdef __LIBGCC_INIT_SECTION_ASM_OP__
 CRT_CALL_STATIC_FUNCTION (__LIBGCC_INIT_SECTION_ASM_OP__, frame_dummy)
 #else /* defined(__LIBGCC_INIT_SECTION_ASM_OP__) */
+#if defined(__FDPIC__)
+__asm__(
+    "   .section .init_array\n"
+    "   .word frame_dummy\n"
+);
+asm (TEXT_SECTION_ASM_OP);
+#else /* defined(__FDPIC__) */
 static func_ptr __frame_dummy_init_array_entry[]
   __attribute__ ((__used__, section(".init_array"), aligned(sizeof(func_ptr))))
   = { frame_dummy };
+#endif /* defined(__FDPIC__) */
 #endif /* !defined(__LIBGCC_INIT_SECTION_ASM_OP__) */
 #endif /* USE_EH_FRAME_REGISTRY || USE_TM_CLONE_REGISTRY */