Introduce <elf-initfini.h> and ELF_INITFINI for all architectures

This supersedes the init_array sysdeps directory.  It allows us to
check for ELF_INITFINI in both C and assembler code, and skip DT_INIT
and DT_FINI processing completely on newer architectures.

A new header file is needed because <dl-machine.h> is incompatible
with assembler code.  <sysdep.h> is compatible with assembler code,
but it cannot be included in all assembler files because on some
architectures, it redefines register names, and some assembler files
conflict with that.

<elf-initfini.h> is replicated for legacy architectures which need
DT_INIT/DT_FINI support.  New architectures follow the generic default
and disable it.

1 files changed, 2 insertions, 6 deletions

diff --git a/elf/dl-init.c b/elf/dl-init.c
index 55d528c7a5..1234611a1c 100644
--- a/elf/dl-init.c
+++ b/elf/dl-init.c
@@ -18,6 +18,7 @@
 
 #include <stddef.h>
 #include <ldsodefs.h>
+#include <elf-initfini.h>
 
 
 /* Type of the initializer.  */
@@ -40,11 +41,6 @@ call_init (struct link_map *l, int argc, char **argv, char **env)
       && l->l_type == lt_executable)
     return;
 
-  /* Are there any constructors?  */
-  if (l->l_info[DT_INIT] == NULL
-      && __builtin_expect (l->l_info[DT_INIT_ARRAY] == NULL, 1))
-    return;
-
   /* Print a debug message if wanted.  */
   if (__glibc_unlikely (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS))
     _dl_debug_printf ("\ncalling init: %s\n\n",
@@ -54,7 +50,7 @@ call_init (struct link_map *l, int argc, char **argv, char **env)
      - the one named by DT_INIT
      - the others in the DT_INIT_ARRAY.
   */
-  if (l->l_info[DT_INIT] != NULL)
+  if (ELF_INITFINI && l->l_info[DT_INIT] != NULL)
     DL_CALL_DT_INIT(l, l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr, argc, argv, env);
 
   /* Next see whether there is an array with initialization functions.  */