mirror of
https://sourceware.org/git/glibc.git
synced 2025-09-01 05:02:03 +03:00
491bb0858e
libpthread used to have its own vfork implementation that differed from libc's only in having a pointless micro-optimization. There is no longer any use to having a separate copy in libpthread, but the historical ABI requires a compatibility shim. microblaze was trying to be slightly too clever about how it did this, and tickled a linker bug. The linker bug should get fixed eventually, but there's no reason for us to keep tickling it in the meantime. This doesn't reuse the generic pt-vfork.c because microblaze doesn't have IFUNC support yet, and it doesn't reuse aarch64/pt-vfork.c because that fails to generate a tailcall (with GCC 7.1.1). * sysdeps/unix/sysv/linux/microblaze/pt-vfork.S: Don't include alpha/pt-vfork.S. Provide own compat shim for vfork and __vfork. * sysdeps/unix/sysv/linux/microblaze/vfork.S: Add __libc_vfork alias. * sysdeps/unix/sysv/linux/microblaze/localplt.data: libpthread.so no longer references __errno_location.
50 lines
1.9 KiB
ArmAsm
50 lines
1.9 KiB
ArmAsm
/* vfork ABI-compatibility entry points for libpthread.
|
|
Copyright (C) 2014-2017 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <shlib-compat.h>
|
|
|
|
/* libpthread used to have its own vfork implementation that differed
|
|
from libc's only in having a pointless micro-optimization. There
|
|
is no longer any use to having a separate copy in libpthread, but
|
|
the historical ABI requires it. For static linking, there is no
|
|
need to provide anything here--the libc version will be linked in.
|
|
For shared library ABI compatibility, there must be __vfork and
|
|
vfork symbols in libpthread.so.
|
|
|
|
As of GCC 7, microblaze can *not* rely on the compiler to generate
|
|
a tail call from this vfork to __libc_vfork. */
|
|
|
|
#if (SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_20) \
|
|
|| SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_20))
|
|
|
|
ENTRY (vfork_compat)
|
|
bri __libc_vfork
|
|
END (vfork_compat)
|
|
|
|
#endif
|
|
|
|
#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_20)
|
|
compat_symbol (libpthread, vfork_compat, vfork, GLIBC_2_0)
|
|
#endif
|
|
|
|
#if SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_20)
|
|
strong_alias (vfork_compat, vfork_compat2)
|
|
compat_symbol (libpthread, vfork_compat2, __vfork, GLIBC_2_1_2)
|
|
#endif
|