diff options
| author |   guenther <guenther@openbsd.org> | 2019-06-02 01:03:01 +0000 |
|---|---|---|
| committer | guenther <guenther@openbsd.org> | 2019-06-02 01:03:01 +0000 |
| commit | 5c7d06e56e289f4145af6fe3394d5d581f2679bd (patch) | |
| tree | 08170e2ff8f3d142db0645a9c85003a1ecf2e71e /lib/libc/include | |
| parent | Refactor the MAP_STACK feature, and introduce another similar variation: (diff) | |
| download | wireguard-openbsd-5c7d06e56e289f4145af6fe3394d5d581f2679bd.tar.xz wireguard-openbsd-5c7d06e56e289f4145af6fe3394d5d581f2679bd.zip | |
Complete the ld.so boot cleanup: move most libc initialization from
_csu_finish() to _libc_preinit(), which is an .init_array function
in shared libc (and mark it INITFIRST) or a .preinit_array function
in static libc, grabbing the _dl_cb callback there from ld.so. Then
in _csu_finish(), invoke the dl_clean_boot() callback to free ld.so's
startup bits before main() gets control.
Other cleanups this permits:
- move various startup structures into .data.rel.ro
- the dl* stubs in libc can be strong and call the callbacks provided
via _dl_cb
- no longer need to conditionalize dlctl() calls on presence of _DYNAMIC
original concept and full diff ok kettenis@
ok deraadt@
Diffstat (limited to 'lib/libc/include')
| -rw-r--r-- | lib/libc/include/namespace.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/libc/include/namespace.h b/lib/libc/include/namespace.h index 79692af0bca..330af4050ad 100644 --- a/lib/libc/include/namespace.h +++ b/lib/libc/include/namespace.h @@ -1,4 +1,4 @@ -/* $OpenBSD: namespace.h,v 1.13 2019/05/13 20:00:32 guenther Exp $ */ +/* $OpenBSD: namespace.h,v 1.14 2019/06/02 01:03:01 guenther Exp $ */ #ifndef _LIBC_NAMESPACE_H_ #define _LIBC_NAMESPACE_H_ @@ -59,6 +59,8 @@ #define MAKE_CLONE(dst, src) __dso_hidden typeof(dst) HIDDEN(dst) \ __attribute__((alias (HIDDEN_STRING(src)))) +#define __relro __attribute__((section(".data.rel.ro"))) + /* * gcc and clang will generate calls to the functions below. |