Fix ARM IFUNC support

In the original ARM IFUNC support, it appears a small chunk of code in the
arm_prelink_conflict_rela function was missed.  This commit adds the missing
code from the original work.

See: https://bugzilla.redhat.com/show_bug.cgi?id=1009601

2015-10-29  Mark Hatle <[email protected]>
	    Kyle McMartin  <[email protected]>
	    Jakub Jelinek  <[email protected]>
	    Julian Brown   <[email protected]>

	* testsuite/ifunc.h: Fix missing #
	* src/arch-arm.c (arm_prelink_conflict_rela): Add missing hunk
	that implemented R_ARM_IRELATIVE, and ifunc conflicts.

	See: https://bugzilla.redhat.com/show_bug.cgi?id=1009601

Signed-off-by: Mark Hatle <[email protected]>

ChangeLog

@@ -1,3 +1,14 @@
+2015-10-29  Mark Hatle <[email protected]>
+	    Kyle McMartin  <[email protected]>
+	    Jakub Jelinek  <[email protected]>
+	    Julian Brown   <[email protected]>
+
+	* testsuite/ifunc.h: Fix missing #
+	* src/arch-arm.c (arm_prelink_conflict_rela): Add missing hunk
+	that implemented R_ARM_IRELATIVE, and ifunc conflicts.
+
+	See: https://bugzilla.redhat.com/show_bug.cgi?id=1009601
+
 2015-10-29  Mark Hatle <[email protected]>
 	* prelink.h: Define SHT_MIPS_ABIFLAGS if not set
 	* prelink.c: OK to skip SHT_MIPS_ABIFLAGS

src/arch-arm.c

@@ -536,15 +536,16 @@ arm_prelink_conflict_rela (DSO *dso, struct prelink_info *info,
 
   if (conflict == NULL)
     {
-      if (info->curtls == NULL)
-	return 0;
-
       switch (GELF_R_TYPE (rela->r_info))
 	{
 	/* Even local DTPMOD and TPOFF relocs need conflicts.  */
 	case R_ARM_TLS_DTPMOD32:
 	case R_ARM_TLS_TPOFF32:
+	  if (info->curtls == NULL || info->dso == dso)
+	    return 0;
 	  break;
+	/* Similarly IRELATIVE relocations always need conflicts.  */
+	case R_ARM_IRELATIVE:
 	/* Likewise TLS_DESC.  */
 	case R_ARM_TLS_DESC:
 	  break;
@@ -553,12 +554,8 @@ arm_prelink_conflict_rela (DSO *dso, struct prelink_info *info,
 	}
       value = 0;
     }
-  else if (conflict->ifunc)
-    {
-      error (0, 0, "%s: STT_GNU_IFUNC not handled on ARM yet",
-	     dso->filename);
-      return 1;
-    }
+  else if (info->dso == dso && !conflict->ifunc)
+    return 0;
   else
     {
       /* DTPOFF32 wants to see only real conflicts, not lookups

testsuite/ifunc.h

@@ -51,7 +51,7 @@ asm (".text\n"						\
     "\t.align 4\n"					\
   "2:\t.long " fn "@GOTOFF\n"				\
   "3:\t.long _GLOBAL_OFFSET_TABLE_-1b\n"
-elif defined __arm__
+#elif defined __arm__
 # ifdef __thumb__
 #  define PIPE_OFFSET "4"
 # else