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.

5 files changed, 0 insertions, 141 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
diff --git a/sysdeps/init_array/crtn.S b/sysdeps/init_array/crtn.S
deleted file mode 100644
index 6f70e77160..0000000000
--- a/sysdeps/init_array/crtn.S
+++ /dev/null
@@ -1,13 +0,0 @@
-/* Dummy crtn 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.  */
diff --git a/sysdeps/init_array/elf-init.c b/sysdeps/init_array/elf-init.c
deleted file mode 100644
index b204bd1de9..0000000000
--- a/sysdeps/init_array/elf-init.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Startup support for ELF initializers/finalizers in the main executable.
-   Copyright (C) 2013-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   In addition to the permissions in the GNU Lesser General Public
-   License, the Free Software Foundation gives you unlimited
-   permission to link the compiled version of this file with other
-   programs, and to distribute those programs without any restriction
-   coming from the use of this file. (The GNU Lesser General Public
-   License restrictions do apply in other respects; for example, they
-   cover modification of the file, and distribution when not linked
-   into another program.)
-
-   Note that people who make modified versions of this file are not
-   obligated to grant this special exception for their modified
-   versions; it is their choice whether to do so. The GNU Lesser
-   General Public License gives permission to release a modified
-   version without this exception; this exception also makes it
-   possible to release a modified version which carries forward this
-   exception.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#define NO_INITFINI
-#include <csu/elf-init.c>
diff --git a/sysdeps/init_array/gmon-start.c b/sysdeps/init_array/gmon-start.c
deleted file mode 100644
index 20f51feafe..0000000000
--- a/sysdeps/init_array/gmon-start.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/* gmon startup hook using .preinit_array.
-   Copyright (C) 2013-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   In addition to the permissions in the GNU Lesser General Public
-   License, the Free Software Foundation gives you unlimited
-   permission to link the compiled version of this file with other
-   programs, and to distribute those programs without any restriction
-   coming from the use of this file.  (The GNU Lesser General Public
-   License restrictions do apply in other respects; for example, they
-   cover modification of the file, and distribution when not linked
-   into another program.)
-
-   Note that people who make modified versions of this file are not
-   obligated to grant this special exception for their modified
-   versions; it is their choice whether to do so.  The GNU Lesser
-   General Public License gives permission to release a modified
-   version without this exception; this exception also makes it
-   possible to release a modified version which carries forward this
-   exception.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* Instead of defining __gmon_start__ globally in gcrt1.o, we make it
-   static and just put a pointer to it into the .preinit_array section.  */
-
-#define GMON_START_ARRAY_SECTION	".preinit_array"
-
-#include <csu/gmon-start.c>
diff --git a/sysdeps/init_array/pt-crti.S b/sysdeps/init_array/pt-crti.S
deleted file mode 100644
index 24c8a5d4d6..0000000000
--- a/sysdeps/init_array/pt-crti.S
+++ /dev/null
@@ -1,23 +0,0 @@
-/* Special initializer support for libpthread.
-   Copyright (C) 2015-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* This arranges for libpthread.so's special initializer to be called as
-   soon as the library is loaded.  */
-
-	.section .init_array,"a",%init_array
-	.dc.a __pthread_initialize_minimal_internal