mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
ca13ce66be
2001-07-25 Ulrich Drepper <drepper@redhat.com> * csu/gmon-start.c: Use ENTRY_POINT_DECL is defined instead of a declaration using ENTRY_POINT. * sysdeps/ia64/elf/entry.h (ENTRY_POINT_DECL): New definition. 2001-07-25 H.J. Lu <hjl@gnu.org> * csu/gmon-start.c: Include <entry.h> (_start): Replaced with ENTRY_POINT.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* Code to enable profiling at program startup.
|
|
Copyright (C) 1995, 1996, 1997, 2000, 2001 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/gmon.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#define __ASSEMBLY__
|
|
#include <entry.h>
|
|
|
|
/* Beginning and end of our code segment. We cannot declare them
|
|
as the external functions since we want the addresses of those
|
|
labels. Taking the address of a function may have different
|
|
meanings on different platforms. */
|
|
#ifdef ENTRY_POINT_DECL
|
|
ENTRY_POINT_DECL(extern)
|
|
#else
|
|
extern void ENTRY_POINT;
|
|
#endif
|
|
extern void etext;
|
|
|
|
#ifndef HAVE_INITFINI
|
|
/* This function gets called at startup by the normal constructor
|
|
mechanism. We link this file together with start.o to produce gcrt1.o,
|
|
so this constructor will be first in the list. */
|
|
|
|
extern void __gmon_start__ (void) __attribute__ ((constructor));
|
|
#else
|
|
/* In ELF and COFF, we cannot use the normal constructor mechanism to call
|
|
__gmon_start__ because gcrt1.o appears before crtbegin.o in the link.
|
|
Instead crti.o calls it specially (see initfini.c). */
|
|
extern void __gmon_start__ (void);
|
|
#endif
|
|
|
|
void
|
|
__gmon_start__ (void)
|
|
{
|
|
#ifdef HAVE_INITFINI
|
|
/* Protect from being called more than once. Since crti.o is linked
|
|
into every shared library, each of their init functions will call us. */
|
|
static int called;
|
|
|
|
if (called)
|
|
return;
|
|
|
|
called = 1;
|
|
#endif
|
|
|
|
/* Start keeping profiling records. */
|
|
__monstartup ((u_long) &ENTRY_POINT, (u_long) &etext);
|
|
|
|
/* Call _mcleanup before exiting; it will write out gmon.out from the
|
|
collected data. */
|
|
atexit (&_mcleanup);
|
|
}
|