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* Makefile.in (NEW_FUNCTIONS): Add atexit to be not exported.

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* lib/atexit.c (atexit): New, statically linkable version of atexit.
	* dcrt0.cc (cygwin_atexit): Add comment to mark this function as old
	entry point.  Indiscriminately check for DSO of function pointer for
	all functions, if checking for DSO of return address fails on x86_64.
	Change comment accordingly.
This commit is contained in:
Corinna Vinschen
2014-11-05 09:48:00 +00:00
parent a2ba36a67d
commit 4d67bb4936
4 changed files with 51 additions and 17 deletions
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23
winsup/cygwin/lib/atexit.c Normal file
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/* atexit.c: atexit entry point
Copyright 2014 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <stddef.h>
/* Statically linked replacement for the former cygwin_atexit. We need
the function here to be able to access the correct __dso_handle of the
caller's DSO. */
int
atexit (void (*fn) (void))
{
extern int __cxa_atexit(void (*)(void*), void*, void*);
extern void *__dso_handle;
return __cxa_atexit ((void (*)(void*))fn, NULL, &__dso_handle);
}