csu: Always use __executable_start in gmon-start.c

Current binutils defines __executable_start as the lowest text
address, so using the entry point address as a fallback is no
longer necessary.  As a result, overriding <entry.h> is only
necessary if the entry point is not called _start.

The previous approach to define __ASSEMBLY__ to suppress the
declaration breaks if headers included by <entry.h> are not
compatible with __ASSEMBLY__.  This happens with rseq integration
because it is necessary to include kernel headers in more places.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

3 files changed, 0 insertions, 63 deletions

diff --git a/sysdeps/hppa/entry.h b/sysdeps/hppa/entry.h
deleted file mode 100644
index 5ea5b47448..0000000000
--- a/sysdeps/hppa/entry.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef __ASSEMBLY__
-extern void _start (void);
-#endif
-
-/* Lives in libgcc.so and canonicalizes function pointers for comparison.  */
-extern unsigned int __canonicalize_funcptr_for_compare (unsigned int fptr);
-
-/* The function's entry point is stored in the first word of the
-   function descriptor (plabel) of _start().  */
-#define ENTRY_POINT __canonicalize_funcptr_for_compare((unsigned int)_start)
-
-/* We have to provide a special declaration.  */
-#define ENTRY_POINT_DECL(class) class void _start (void);
diff --git a/sysdeps/ia64/entry.h b/sysdeps/ia64/entry.h
deleted file mode 100644
index e11b49fc53..0000000000
--- a/sysdeps/ia64/entry.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <link.h>
-#include <dl-fptr.h>
-
-#ifndef __ASSEMBLY__
-extern void _start (void);
-#endif
-
-/* The function's entry point is stored in the first word of the
-   function descriptor (plabel) of _start().  */
-#define ENTRY_POINT ELF_PTR_TO_FDESC (_start)->ip
-
-/* We have to provide a special declaration.  */
-#define ENTRY_POINT_DECL(class) class void _start (void);
diff --git a/sysdeps/powerpc/powerpc64/entry.h b/sysdeps/powerpc/powerpc64/entry.h
deleted file mode 100644
index 99c81cb982..0000000000
--- a/sysdeps/powerpc/powerpc64/entry.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Finding the entry point and start of text.  PowerPC64 version.
-   Copyright (C) 2002-2021 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/>.  */
-
-
-#ifndef __ASSEMBLY__
-extern void _start (void);
-#endif
-
-#define ENTRY_POINT _start
-
-#if _CALL_ELF != 2
-/* We have to provide a special declaration.  */
-#define ENTRY_POINT_DECL(class) class void _start (void);
-
-/* Use the address of ._start as the lowest address for which we need
-   to keep profiling records.  We can't copy the ia64 scheme as our
-   entry poiny address is really the address of the function
-   descriptor, not the actual function entry.  */
-#define TEXT_START \
-  ({ extern unsigned long int _start_as_data[] asm ("_start");  \
-     _start_as_data[0]; })
-#endif