From 89b4bd6b6028852065b65b9d6cf4e1ea74a10634 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 23 May 2014 16:23:32 -0400 Subject: aarch64: Consolidate NPTL/non versions of vfork At the same time, incorporate the 0 -> 0x80000000 mapping of the pid expected by raise.c. --- sysdeps/unix/sysv/linux/aarch64/pt-vfork.c | 54 ++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/aarch64/pt-vfork.c (limited to 'sysdeps/unix/sysv/linux/aarch64/pt-vfork.c') diff --git a/sysdeps/unix/sysv/linux/aarch64/pt-vfork.c b/sysdeps/unix/sysv/linux/aarch64/pt-vfork.c new file mode 100644 index 0000000000..5dd23bf00d --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/pt-vfork.c @@ -0,0 +1,54 @@ +/* vfork ABI-compatibility entry points for libpthread. + Copyright (C) 2014 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 + . */ + +#include + +/* 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. */ + +#if HAVE_IFUNC +# include +#elif (SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_20) \ + || SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_20)) + +/* Thankfully, on AArch64 we can rely on the compiler generating + a tail call here. */ + +extern void __libc_vfork (void); + +void +vfork_compat (void) +{ + __libc_vfork (); +} + +# 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 + +#endif -- cgit v1.2.3-70-g09d2