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, 0 insertions, 27 deletions

diff --git a/sysdeps/init_array/crti.S b/sysdeps/init_array/crti.S
deleted file mode 100644
index 145c918f93..0000000000
--- a/sysdeps/init_array/crti.S
+++ /dev/null
@@ -1,27 +0,0 @@
-/* Dummy crti file.
-
-   In this configuration, crti.o and crtn.o are both empty because the
-   .init_array/.fini_array sections are used exclusively.
-
-   Older ports cannot use this because even if the linker used to
-   build libc itself has .init_array support, we don't want to produce
-   a crt[in].o that presume a linker that new will be used to link
-   other things later.
-
-   But new configurations without compatibility concerns for
-   toolchains without .init_array support can use this to avoid the
-   superfluous .init and .fini boilerplate code.  */
-
-#ifdef PREINIT_FUNCTION
-
-#if PREINIT_FUNCTION_WEAK
-# error PREINIT_FUNCTION_WEAK is unsupported
-#endif
-
-/* This arranges for PREINIT_FUNCTION to be called upon loading a library that
-   contains crti.o.  */
-
-	.section .init_array,"a",%init_array
-	.dc.a PREINIT_FUNCTION
-
-#endif