aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorFlorian Weimer <fweimer@redhat.com>2020-02-18 14:42:41 +0100
committerFlorian Weimer <fweimer@redhat.com>2020-02-18 15:12:25 +0100
commitf4349837d93b4dfe9ba09791e280ee2d6c99919f (patch)
tree2d9b57dc8a2b38bc369e0e0f89232046d8be38ca
parent6e05978f0c30e52420e086cc3156655471e6fb0a (diff)
downloadglibc-f4349837d93b4dfe9ba09791e280ee2d6c99919f.tar
glibc-f4349837d93b4dfe9ba09791e280ee2d6c99919f.tar.gz
glibc-f4349837d93b4dfe9ba09791e280ee2d6c99919f.tar.bz2
glibc-f4349837d93b4dfe9ba09791e280ee2d6c99919f.zip
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.
-rw-r--r--csu/elf-init.c7
-rw-r--r--csu/gmon-start.c8
-rw-r--r--elf/dl-fini.c5
-rw-r--r--elf/dl-init.c8
-rw-r--r--nptl/pt-crti.S13
-rw-r--r--sysdeps/aarch64/elf-initfini.h20
-rw-r--r--sysdeps/alpha/elf-initfini.h (renamed from sysdeps/init_array/pt-crti.S)11
-rw-r--r--sysdeps/arm/elf-initfini.h20
-rw-r--r--sysdeps/csky/Implies1
-rw-r--r--sysdeps/generic/crti.S (renamed from sysdeps/init_array/crti.S)12
-rw-r--r--sysdeps/generic/crtn.S (renamed from sysdeps/init_array/crtn.S)6
-rw-r--r--sysdeps/generic/elf-initfini.h24
-rw-r--r--sysdeps/hppa/elf-initfini.h20
-rw-r--r--sysdeps/ia64/elf-initfini.h20
-rw-r--r--sysdeps/init_array/elf-init.c37
-rw-r--r--sysdeps/init_array/gmon-start.c41
-rw-r--r--sysdeps/m68k/elf-initfini.h20
-rw-r--r--sysdeps/microblaze/elf-initfini.h20
-rw-r--r--sysdeps/mips/elf-initfini.h20
-rw-r--r--sysdeps/nios2/elf-initfini.h20
-rw-r--r--sysdeps/powerpc/elf-initfini.h20
-rw-r--r--sysdeps/riscv/Implies2
-rw-r--r--sysdeps/s390/elf-initfini.h20
-rw-r--r--sysdeps/sh/elf-initfini.h20
-rw-r--r--sysdeps/sparc/elf-initfini.h20
-rw-r--r--sysdeps/x86/elf-initfini.h20
26 files changed, 330 insertions, 105 deletions
diff --git a/csu/elf-init.c b/csu/elf-init.c
index b713c8b0fb..98b3f11ff5 100644
--- a/csu/elf-init.c
+++ b/csu/elf-init.c
@@ -34,6 +34,7 @@
<https://www.gnu.org/licenses/>. */
#include <stddef.h>
+#include <elf-initfini.h>
/* These magic symbols are provided by the linker. */
@@ -49,7 +50,7 @@ extern void (*__fini_array_start []) (void) attribute_hidden;
extern void (*__fini_array_end []) (void) attribute_hidden;
-#ifndef NO_INITFINI
+#if ELF_INITFINI
/* These function symbols are provided for the .init/.fini section entry
points automagically by the linker. */
extern void _init (void);
@@ -79,7 +80,7 @@ __libc_csu_init (int argc, char **argv, char **envp)
}
#endif
-#ifndef NO_INITFINI
+#if ELF_INITFINI
_init ();
#endif
@@ -99,7 +100,7 @@ __libc_csu_fini (void)
while (i-- > 0)
(*__fini_array_start [i]) ();
-# ifndef NO_INITFINI
+# if ELF_INITFINI
_fini ();
# endif
#endif
diff --git a/csu/gmon-start.c b/csu/gmon-start.c
index 2803be342a..da9f04c522 100644
--- a/csu/gmon-start.c
+++ b/csu/gmon-start.c
@@ -37,6 +37,7 @@
#include <sys/gmon.h>
#include <stdlib.h>
#include <unistd.h>
+#include <elf-initfini.h>
#define __ASSEMBLY__
#include <entry.h>
@@ -59,6 +60,13 @@ extern char etext[];
# endif
#endif
+#if !ELF_INITFINI
+/* 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"
+#endif
+
#ifdef GMON_START_ARRAY_SECTION
static void __gmon_start__ (void);
static void (*const gmon_start_initializer) (void)
diff --git a/elf/dl-fini.c b/elf/dl-fini.c
index 226a6f077a..231db3d66d 100644
--- a/elf/dl-fini.c
+++ b/elf/dl-fini.c
@@ -19,6 +19,7 @@
#include <assert.h>
#include <string.h>
#include <ldsodefs.h>
+#include <elf-initfini.h>
/* Type of the constructor functions. */
@@ -117,7 +118,7 @@ _dl_fini (void)
/* Is there a destructor function? */
if (l->l_info[DT_FINI_ARRAY] != NULL
- || l->l_info[DT_FINI] != NULL)
+ || (ELF_INITFINI && l->l_info[DT_FINI] != NULL))
{
/* When debugging print a message first. */
if (__builtin_expect (GLRO(dl_debug_mask)
@@ -139,7 +140,7 @@ _dl_fini (void)
}
/* Next try the old-style destructor. */
- if (l->l_info[DT_FINI] != NULL)
+ if (ELF_INITFINI && l->l_info[DT_FINI] != NULL)
DL_CALL_DT_FINI
(l, l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr);
}
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. */
diff --git a/nptl/pt-crti.S b/nptl/pt-crti.S
index 6c60f8a1a4..3dbef78adb 100644
--- a/nptl/pt-crti.S
+++ b/nptl/pt-crti.S
@@ -33,11 +33,18 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
+#include <elf-initfini.h>
+
/* Arrange for __pthread_initialize_minimal_internal to be called at
libpthread startup, instead of conditionally calling
__gmon_start__. */
-#define PREINIT_FUNCTION __pthread_initialize_minimal_internal
-#define PREINIT_FUNCTION_WEAK 0
+#if ELF_INITFINI
+# define PREINIT_FUNCTION __pthread_initialize_minimal_internal
+# define PREINIT_FUNCTION_WEAK 0
-#include <crti.S>
+# include <crti.S>
+#else
+ .section .init_array,"a",%init_array
+ .dc.a __pthread_initialize_minimal_internal
+#endif
diff --git a/sysdeps/aarch64/elf-initfini.h b/sysdeps/aarch64/elf-initfini.h
new file mode 100644
index 0000000000..bb436065a8
--- /dev/null
+++ b/sysdeps/aarch64/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. AArch64 version.
+ Copyright (C) 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
+ <http://www.gnu.org/licenses/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/init_array/pt-crti.S b/sysdeps/alpha/elf-initfini.h
index 24c8a5d4d6..69d056d493 100644
--- a/sysdeps/init_array/pt-crti.S
+++ b/sysdeps/alpha/elf-initfini.h
@@ -1,5 +1,5 @@
-/* Special initializer support for libpthread.
- Copyright (C) 2015-2020 Free Software Foundation, Inc.
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. Alpha version.
+ Copyright (C) 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
@@ -16,8 +16,5 @@
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
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/arm/elf-initfini.h b/sysdeps/arm/elf-initfini.h
new file mode 100644
index 0000000000..24f22352db
--- /dev/null
+++ b/sysdeps/arm/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. Arm version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/csky/Implies b/sysdeps/csky/Implies
index fd80b4826e..f8c3a7586e 100644
--- a/sysdeps/csky/Implies
+++ b/sysdeps/csky/Implies
@@ -1,4 +1,3 @@
-init_array
wordsize-32
# C-SKY uses IEEE 754 floating point.
ieee754/flt-32
diff --git a/sysdeps/init_array/crti.S b/sysdeps/generic/crti.S
index 145c918f93..82d6dc0d91 100644
--- a/sysdeps/init_array/crti.S
+++ b/sysdeps/generic/crti.S
@@ -12,12 +12,18 @@
toolchains without .init_array support can use this to avoid the
superfluous .init and .fini boilerplate code. */
-#ifdef PREINIT_FUNCTION
+#include <elf-initfini.h>
-#if PREINIT_FUNCTION_WEAK
-# error PREINIT_FUNCTION_WEAK is unsupported
+#if ELF_INITFINI
+# error Cannot use default crti.S because it lacks _init code
#endif
+#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. */
diff --git a/sysdeps/init_array/crtn.S b/sysdeps/generic/crtn.S
index 6f70e77160..d92b07dd0b 100644
--- a/sysdeps/init_array/crtn.S
+++ b/sysdeps/generic/crtn.S
@@ -11,3 +11,9 @@
But new configurations without compatibility concerns for
toolchains without .init_array support can use this to avoid the
superfluous .init and .fini boilerplate code. */
+
+#include <elf-initfini.h>
+
+#if ELF_INITFINI
+# error Cannot use genetric crtn.S because it lacks _fini code
+#endif
diff --git a/sysdeps/generic/elf-initfini.h b/sysdeps/generic/elf-initfini.h
new file mode 100644
index 0000000000..75e920d283
--- /dev/null
+++ b/sysdeps/generic/elf-initfini.h
@@ -0,0 +1,24 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader.
+ Copyright (C) 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/>. */
+
+/* Legacy platforms define this to 1. If 0, the dynamic linker
+ ignores the DT_INIT and DT_FINI tags, and static binaries will not
+ call the _init or _fini functions. If 1, the old constructor
+ mechanisms are used in addition to the initarray/finiarray
+ support. */
+#define ELF_INITFINI 0
diff --git a/sysdeps/hppa/elf-initfini.h b/sysdeps/hppa/elf-initfini.h
new file mode 100644
index 0000000000..28f84bb039
--- /dev/null
+++ b/sysdeps/hppa/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. HPPA version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/ia64/elf-initfini.h b/sysdeps/ia64/elf-initfini.h
new file mode 100644
index 0000000000..feccba6799
--- /dev/null
+++ b/sysdeps/ia64/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. IA64 version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
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/m68k/elf-initfini.h b/sysdeps/m68k/elf-initfini.h
new file mode 100644
index 0000000000..103b402866
--- /dev/null
+++ b/sysdeps/m68k/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. m68k version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/microblaze/elf-initfini.h b/sysdeps/microblaze/elf-initfini.h
new file mode 100644
index 0000000000..8fcb2cab0d
--- /dev/null
+++ b/sysdeps/microblaze/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader, for Microblaze.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/mips/elf-initfini.h b/sysdeps/mips/elf-initfini.h
new file mode 100644
index 0000000000..9e8b6eed83
--- /dev/null
+++ b/sysdeps/mips/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. MIPS version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/nios2/elf-initfini.h b/sysdeps/nios2/elf-initfini.h
new file mode 100644
index 0000000000..498ca35b8e
--- /dev/null
+++ b/sysdeps/nios2/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. nios2 version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/powerpc/elf-initfini.h b/sysdeps/powerpc/elf-initfini.h
new file mode 100644
index 0000000000..ca89f427f2
--- /dev/null
+++ b/sysdeps/powerpc/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader, for powerpc.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/riscv/Implies b/sysdeps/riscv/Implies
index c88325b8be..1945b1f4bb 100644
--- a/sysdeps/riscv/Implies
+++ b/sysdeps/riscv/Implies
@@ -1,5 +1,3 @@
-init_array
-
ieee754/ldbl-128
ieee754/dbl-64
ieee754/flt-32
diff --git a/sysdeps/s390/elf-initfini.h b/sysdeps/s390/elf-initfini.h
new file mode 100644
index 0000000000..531c764ae2
--- /dev/null
+++ b/sysdeps/s390/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. S/390 version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/sh/elf-initfini.h b/sysdeps/sh/elf-initfini.h
new file mode 100644
index 0000000000..0aeda572b2
--- /dev/null
+++ b/sysdeps/sh/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. SH version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/sparc/elf-initfini.h b/sysdeps/sparc/elf-initfini.h
new file mode 100644
index 0000000000..e482fe6eca
--- /dev/null
+++ b/sysdeps/sparc/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. SPARC version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1
diff --git a/sysdeps/x86/elf-initfini.h b/sysdeps/x86/elf-initfini.h
new file mode 100644
index 0000000000..7a48ebda92
--- /dev/null
+++ b/sysdeps/x86/elf-initfini.h
@@ -0,0 +1,20 @@
+/* Determine DT_INIT/DT_FINI support in the dynamic loader. x86 version.
+ Copyright (C) 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/>. */
+
+/* Enable DT_INIT/DT_FINI support. */
+#define ELF_INITFINI 1