spelling fixes; from paul tagliamonte
any changes not taken noted on tech, but chiefly here i did not take the
cancelation - cancellation changes;

In __cxa_atexit(), there is no need to initialize local pointer before
the lock, when it is correctly initialized after the lock
ok otto millert

Move __cxa_thread_atexit* to its own .c file to avoid pulling the code
(w/ _dlctl reference) into static executables. It's all Mark's code so
put his preferred copyright on it.

ok kettenis@

Remove DEF_STRONG(__cxa_thread_atexit_impl). This produces an unwanted
_libc___cxa_thread_atexit_impl reference on gcc architectures that breaks
the build.

Implement __cxa_thread_atexit to support C++11 thread_local scope. The
interface is also made available as __cxa_thread_atexit_impl to satisfy the
needs of GNU libstdc++.

ok guenther@, millert@

libc.so can't be unloaded, so move the hidden atexit() and pthread_atfork()
stubs for the executable from crtbegin.o into libc, which lets them be
excluded from static links that don't use them.
For this, drop the normal crt{begin,end}S.o from libc.so: the .init and .fini
sections for libc aren't called at the right times anyway, so it's good that
they're unused. libc.so just needs __guard_local and the .note.openbsd.ident
section, so add them to stack_protector.c for now (this will be improved)

"good time" deraadt@

Move the _atfork_list definition to atexit.c so that the fork syscall stub
doesn't get pulled into all static executables

ok millert@ jca@

Hide __atexit and __atexit_register_cleanup()
Wrap __cxa_{atexit,finalize}() so the call from exit() goes direct
Switch regress/lib/libc/atexit/ to be built with -static so that it can
still access __atexit*

ok millert@ jca@

Make pthread_atfork() track the DSO that called it like atexit() does,
unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still overrides the
inner call to handle locking and thread-library reinitialization.
Major version bump for both libc and libpthread.

verification that this fixes various ports ajacoutot@
asm assistance miod@; ok millert@ deraadt@

Add locking for __cxa_finalize() as it modifies the page permissions of the
__atexit tables and touches global variables. From Srinavasa Nagaraju
through Android/Elliott Hughes.

ok tedu@, guenther@

as noted by google/android via kettenis, atexit handlers can install new
handlers. if this happens, restart the loop.
ok kettenis matthew millert miod

Always call atexit handlers as if they were registered with __cxa_atexit.
The extra argument doesn't hurt genuine atexit handlers and this fixes a
bug where we didn't provide the argument (effectively passing garbage) for
functions registered with __cxa_atexit in the main executable.

Pointed out by Dmitriy Ivanov <dimitry@google.com> and Elliott Hughes
<enh@google.com>.

ok matthew@

Move atexit(3) into crtbegin.c and certbeginS.c such that we can pass the
right __dso_handle and have dlopen'ed shared objects run their atexit handlers
when they get unloaded. This is what Linux does, and several ports depend on
this behaviour (and will crash upon exit without this chang).

Based on an earlier diff from matthew@
Tested by ajacoutot@
ok deraadt@

Two small cleanups to atexit: remove unneeded __atexit_invalid, and
move the call_depth decrement so it happens unconditionally and can
still return to 0 when called with dso!=NULL.

ok millert

Fix __cxa_finalize() so that calling __cxa_finalize(NULL) properly
invokes handlers registered with __cxa_atexit().

"seems right" deraadt@

Add missing header to avoid warning

ok millert@ ray@

Add __cxa_atexit() support for gcc3. This provides support for shared object destructors called at dlclose() time. Inspired by similar changes in FreeBSD and NetBSD.

Avouid a race in atexit() handling by introducing a lock. Problem
originally reported by Gergely Kovacs; help from dhartmei@;
ok tedu@ millert@

Remove obsolete comment. ok deraadt@

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

no longer a need for the free(malloc(1)) hack, because the brk stuff
no longer needs initializing (we use mmap for malloc entirely now)
noticed by kjell, ok dhartmei, tested by me

ansi + de-register

ok otto deraadt

Move __cleanup into mprotect'ed page to prevent unintentional modifications
similar to the atexit handlers. Idea and help deraadt@, ok deraadt@

missing include, ok theo

re-enable function pointer table protection, this time make sure that
malloc.c gets the first mmap() call (since it depends on that, for its
sbrk(0) use). ok deraadt@

Back it out, it breaks something in perl (seen with spamassassin), debug
first.

Replace atexit handler. mprotect() the pages so an attempt to modify the
function pointers from the outside will segfault. Idea, hints and feedback
from deraadt. ok deraadt.

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

branches: 1.1.1;
Initial revision

In __cxa_atexit(), there is no need to initialize local pointer before
the lock, when it is correctly initialized after the lock
ok otto millert

Move __cxa_thread_atexit* to its own .c file to avoid pulling the code
(w/ _dlctl reference) into static executables. It's all Mark's code so
put his preferred copyright on it.

ok kettenis@

Remove DEF_STRONG(__cxa_thread_atexit_impl). This produces an unwanted
_libc___cxa_thread_atexit_impl reference on gcc architectures that breaks
the build.

Implement __cxa_thread_atexit to support C++11 thread_local scope. The
interface is also made available as __cxa_thread_atexit_impl to satisfy the
needs of GNU libstdc++.

ok guenther@, millert@

libc.so can't be unloaded, so move the hidden atexit() and pthread_atfork()
stubs for the executable from crtbegin.o into libc, which lets them be
excluded from static links that don't use them.
For this, drop the normal crt{begin,end}S.o from libc.so: the .init and .fini
sections for libc aren't called at the right times anyway, so it's good that
they're unused. libc.so just needs __guard_local and the .note.openbsd.ident
section, so add them to stack_protector.c for now (this will be improved)

"good time" deraadt@

Move the _atfork_list definition to atexit.c so that the fork syscall stub
doesn't get pulled into all static executables

ok millert@ jca@

Hide __atexit and __atexit_register_cleanup()
Wrap __cxa_{atexit,finalize}() so the call from exit() goes direct
Switch regress/lib/libc/atexit/ to be built with -static so that it can
still access __atexit*

ok millert@ jca@

Make pthread_atfork() track the DSO that called it like atexit() does,
unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still overrides the
inner call to handle locking and thread-library reinitialization.
Major version bump for both libc and libpthread.

verification that this fixes various ports ajacoutot@
asm assistance miod@; ok millert@ deraadt@

Add locking for __cxa_finalize() as it modifies the page permissions of the
__atexit tables and touches global variables. From Srinavasa Nagaraju
through Android/Elliott Hughes.

ok tedu@, guenther@

as noted by google/android via kettenis, atexit handlers can install new
handlers. if this happens, restart the loop.
ok kettenis matthew millert miod

Always call atexit handlers as if they were registered with __cxa_atexit.
The extra argument doesn't hurt genuine atexit handlers and this fixes a
bug where we didn't provide the argument (effectively passing garbage) for
functions registered with __cxa_atexit in the main executable.

Pointed out by Dmitriy Ivanov <dimitry@google.com> and Elliott Hughes
<enh@google.com>.

ok matthew@

Move atexit(3) into crtbegin.c and certbeginS.c such that we can pass the
right __dso_handle and have dlopen'ed shared objects run their atexit handlers
when they get unloaded. This is what Linux does, and several ports depend on
this behaviour (and will crash upon exit without this chang).

Based on an earlier diff from matthew@
Tested by ajacoutot@
ok deraadt@

Two small cleanups to atexit: remove unneeded __atexit_invalid, and
move the call_depth decrement so it happens unconditionally and can
still return to 0 when called with dso!=NULL.

ok millert

Fix __cxa_finalize() so that calling __cxa_finalize(NULL) properly
invokes handlers registered with __cxa_atexit().

"seems right" deraadt@

Add missing header to avoid warning

ok millert@ ray@

Add __cxa_atexit() support for gcc3. This provides support for shared object destructors called at dlclose() time. Inspired by similar changes in FreeBSD and NetBSD.

Avouid a race in atexit() handling by introducing a lock. Problem
originally reported by Gergely Kovacs; help from dhartmei@;
ok tedu@ millert@

Remove obsolete comment. ok deraadt@

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

no longer a need for the free(malloc(1)) hack, because the brk stuff
no longer needs initializing (we use mmap for malloc entirely now)
noticed by kjell, ok dhartmei, tested by me

ansi + de-register

ok otto deraadt

Move __cleanup into mprotect'ed page to prevent unintentional modifications
similar to the atexit handlers. Idea and help deraadt@, ok deraadt@

missing include, ok theo

re-enable function pointer table protection, this time make sure that
malloc.c gets the first mmap() call (since it depends on that, for its
sbrk(0) use). ok deraadt@

Back it out, it breaks something in perl (seen with spamassassin), debug
first.

Replace atexit handler. mprotect() the pages so an attempt to modify the
function pointers from the outside will segfault. Idea, hints and feedback
from deraadt. ok deraadt.

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

branches: 1.1.1;
Initial revision

Move __cxa_thread_atexit* to its own .c file to avoid pulling the code
(w/ _dlctl reference) into static executables. It's all Mark's code so
put his preferred copyright on it.

ok kettenis@

Remove DEF_STRONG(__cxa_thread_atexit_impl). This produces an unwanted
_libc___cxa_thread_atexit_impl reference on gcc architectures that breaks
the build.

Implement __cxa_thread_atexit to support C++11 thread_local scope. The
interface is also made available as __cxa_thread_atexit_impl to satisfy the
needs of GNU libstdc++.

ok guenther@, millert@

libc.so can't be unloaded, so move the hidden atexit() and pthread_atfork()
stubs for the executable from crtbegin.o into libc, which lets them be
excluded from static links that don't use them.
For this, drop the normal crt{begin,end}S.o from libc.so: the .init and .fini
sections for libc aren't called at the right times anyway, so it's good that
they're unused. libc.so just needs __guard_local and the .note.openbsd.ident
section, so add them to stack_protector.c for now (this will be improved)

"good time" deraadt@

Move the _atfork_list definition to atexit.c so that the fork syscall stub
doesn't get pulled into all static executables

ok millert@ jca@

Hide __atexit and __atexit_register_cleanup()
Wrap __cxa_{atexit,finalize}() so the call from exit() goes direct
Switch regress/lib/libc/atexit/ to be built with -static so that it can
still access __atexit*

ok millert@ jca@

Make pthread_atfork() track the DSO that called it like atexit() does,
unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still overrides the
inner call to handle locking and thread-library reinitialization.
Major version bump for both libc and libpthread.

verification that this fixes various ports ajacoutot@
asm assistance miod@; ok millert@ deraadt@

Add locking for __cxa_finalize() as it modifies the page permissions of the
__atexit tables and touches global variables. From Srinavasa Nagaraju
through Android/Elliott Hughes.

ok tedu@, guenther@

as noted by google/android via kettenis, atexit handlers can install new
handlers. if this happens, restart the loop.
ok kettenis matthew millert miod

Always call atexit handlers as if they were registered with __cxa_atexit.
The extra argument doesn't hurt genuine atexit handlers and this fixes a
bug where we didn't provide the argument (effectively passing garbage) for
functions registered with __cxa_atexit in the main executable.

Pointed out by Dmitriy Ivanov <dimitry@google.com> and Elliott Hughes
<enh@google.com>.

ok matthew@

Move atexit(3) into crtbegin.c and certbeginS.c such that we can pass the
right __dso_handle and have dlopen'ed shared objects run their atexit handlers
when they get unloaded. This is what Linux does, and several ports depend on
this behaviour (and will crash upon exit without this chang).

Based on an earlier diff from matthew@
Tested by ajacoutot@
ok deraadt@

Two small cleanups to atexit: remove unneeded __atexit_invalid, and
move the call_depth decrement so it happens unconditionally and can
still return to 0 when called with dso!=NULL.

ok millert

Fix __cxa_finalize() so that calling __cxa_finalize(NULL) properly
invokes handlers registered with __cxa_atexit().

"seems right" deraadt@

Add missing header to avoid warning

ok millert@ ray@

Add __cxa_atexit() support for gcc3. This provides support for shared object destructors called at dlclose() time. Inspired by similar changes in FreeBSD and NetBSD.

Avouid a race in atexit() handling by introducing a lock. Problem
originally reported by Gergely Kovacs; help from dhartmei@;
ok tedu@ millert@

Remove obsolete comment. ok deraadt@

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

no longer a need for the free(malloc(1)) hack, because the brk stuff
no longer needs initializing (we use mmap for malloc entirely now)
noticed by kjell, ok dhartmei, tested by me

ansi + de-register

ok otto deraadt

Move __cleanup into mprotect'ed page to prevent unintentional modifications
similar to the atexit handlers. Idea and help deraadt@, ok deraadt@

missing include, ok theo

re-enable function pointer table protection, this time make sure that
malloc.c gets the first mmap() call (since it depends on that, for its
sbrk(0) use). ok deraadt@

Back it out, it breaks something in perl (seen with spamassassin), debug
first.

Replace atexit handler. mprotect() the pages so an attempt to modify the
function pointers from the outside will segfault. Idea, hints and feedback
from deraadt. ok deraadt.

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

branches: 1.1.1;
Initial revision