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cygming-crtend.c (register_frame_ctor): Move atexit call from here...

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2014-08-19  Yaakov Selkowitz  <yselkowi@redhat.com>

	* config/i386/cygming-crtend.c (register_frame_ctor): Move atexit
	call from here...
	* config/i386/cygming-crtbegin.c (__gcc_register_frame): to here.
	(__dso_handle): Define on Cygwin.
	* config/i386/t-cygming (crtbeginS.o): New rule.
	* config.host (*-*-cygwin*): Add crtbeginS.o to extra_parts.

From-SVN: r214162
This commit is contained in:
Yaakov Selkowitz 2014-08-19 15:22:59 +00:00 • committed by Kai Tietz
parent 301f44023e
commit 25efdb9f92
5 changed files with 36 additions and 8 deletions
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7
libgcc/ChangeLog
View file

@ -1,5 +1,12 @@
2014-08-19 Yaakov Selkowitz <yselkowi@redhat.com>
* config/i386/cygming-crtend.c (register_frame_ctor): Move atexit
call from here...
* config/i386/cygming-crtbegin.c (__gcc_register_frame): to here.
(__dso_handle): Define on Cygwin.
* config/i386/t-cygming (crtbeginS.o): New rule.
* config.host (*-*-cygwin*): Add crtbeginS.o to extra_parts.
* config/i386/cygming-crtbegin.c (deregister_frame_fn): Fix
declaration syntax.

4
libgcc/config.host
View file

@ -614,7 +614,7 @@ i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*)
i[4567]86-wrs-vxworks|i[4567]86-wrs-vxworksae)
;;
i[34567]86-*-cygwin*)
extra_parts="crtbegin.o crtend.o crtfastmath.o"
extra_parts="crtbegin.o crtbeginS.o crtend.o crtfastmath.o"
# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
if test x$enable_sjlj_exceptions = xyes; then
tmake_eh_file="i386/t-sjlj-eh"
@ -630,7 +630,7 @@ i[34567]86-*-cygwin*)
tmake_file="${tmake_file} ${tmake_eh_file} ${tmake_dlldir_file} i386/t-slibgcc-cygming i386/t-cygming i386/t-cygwin i386/t-crtfm i386/t-chkstk t-dfprules"
;;
x86_64-*-cygwin*)
extra_parts="crtbegin.o crtend.o crtfastmath.o"
extra_parts="crtbegin.o crtbeginS.o crtend.o crtfastmath.o"
# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
if test x$enable_sjlj_exceptions = xyes; then
tmake_eh_file="i386/t-sjlj-eh"

24
libgcc/config/i386/cygming-crtbegin.c
View file

@ -111,6 +111,23 @@ static void *__JCR_LIST__[]
= { };
#endif
#ifdef __CYGWIN__
/* Declare the __dso_handle variable. It should have a unique value
in every shared-object; in a main program its value is zero. The
object should in any case be protected. This means the instance
in one DSO or the main program is not used in another object. The
dynamic linker takes care of this. */
#ifdef CRTSTUFFS_O
extern void *__ImageBase;
void *__dso_handle = &__ImageBase;
#else
void *__dso_handle = 0;
#endif
#endif /* __CYGWIN__ */
/* Pull in references from libgcc.a(unwind-dw2-fde.o) in the
startfile. These are referenced by a ctor and dtor in crtend.o. */
extern void __gcc_register_frame (void);
@ -161,6 +178,13 @@ __gcc_register_frame (void)
register_class_fn (__JCR_LIST__);
}
#endif
#if DEFAULT_USE_CXA_ATEXIT
/* If we use the __cxa_atexit method to register C++ dtors
at object construction, also use atexit to register eh frame
info cleanup. */
atexit(__gcc_deregister_frame);
#endif /* DEFAULT_USE_CXA_ATEXIT */
}
void

6
libgcc/config/i386/cygming-crtend.c
View file

@ -70,12 +70,6 @@ static void
register_frame_ctor (void)
{
__gcc_register_frame ();
#if DEFAULT_USE_CXA_ATEXIT
/* If we use the __cxa_atexit method to register C++ dtors
at object construction, also use atexit to register eh frame
info cleanup. */
atexit (__gcc_deregister_frame);
#endif
}
#if !DEFAULT_USE_CXA_ATEXIT

3
libgcc/config/i386/t-cygming
View file

@ -8,6 +8,9 @@ CUSTOM_CRTSTUFF = yes
crtbegin.o: $(srcdir)/config/i386/cygming-crtbegin.c
$(crt_compile) -fno-omit-frame-pointer -c $<
crtbeginS.o: $(srcdir)/config/i386/cygming-crtbegin.c
$(crt_compile) -fno-omit-frame-pointer -c $< -DCRTSTUFFS_O
# We intentionally use a implementation-reserved init priority of 0,
# so allow the warning.
crtend.o: $(srcdir)/config/i386/cygming-crtend.c