Fix bug where --icf=safe triggers segfault when linking ARM.

When checking a R_ARM_TARGET[12] relocation, we need a valid target
pointer, but the garbage collection code was passing a NULL instead.

gold/
	PR gold/23046
	* gc.h (gc_process_relocs): Pass target to
	scan.global_reloc_may_be_function_pointer.

diff --git a/gold/ChangeLog b/gold/ChangeLog
index fa73173..b86812c 100644 (file)
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,9 @@
+2018-04-14  Cary Coutant  <ccoutant@gmail.com>
+
+       PR gold/23046
+       * gc.h (gc_process_relocs): Pass target to
+       scan.global_reloc_may_be_function_pointer.
+
 2018-04-09  Alan Modra  <amodra@gmail.com>
 
        * configure: Regenerate.

diff --git a/gold/gc.h b/gold/gc.h
index eda332c..00f383f 100644 (file)
--- a/gold/gc.h
+++ b/gold/gc.h
@@ -300,7 +300,7 @@ gc_process_relocs(
               && dst_obj != NULL
               && (!is_ordinary
                   || scan.global_reloc_may_be_function_pointer(
-                       symtab, NULL, NULL, src_obj, src_indx, NULL, reloc,
+                       symtab, NULL, target, src_obj, src_indx, NULL, reloc,
                        r_type, gsym)))
             symtab->icf()->set_section_has_function_pointers(dst_obj, dst_indx);