diff options
author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
commit | e84eabb3871c9b39e59323bf3f6b98c2ca9d1cd0 (patch) | |
tree | dff3f1b79454b518d15a7b9bbedeb57ff156bbe8 /ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S | |
parent | 75f0d3040a2c2de8842bfa7a09e11da1a73e17d0 (diff) | |
parent | e64ac02c24b43659048622714afdc92fedf561fa (diff) |
Merge glibc-ports into ports/ directory.glibc-2.16-ports-merge
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S')
-rw-r--r-- | ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S b/ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S new file mode 100644 index 0000000000..3719d1b46d --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/alpha/nptl/pt-vfork.S @@ -0,0 +1,42 @@ +/* Copyright (C) 2003, 2004 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 <tcb-offsets.h> + +#undef PSEUDO_PREPARE_ARGS +#define PSEUDO_PREPARE_ARGS \ + /* Load the current cached pid value across the vfork. */ \ + rduniq; \ + ldl a2, PID_OFFSET(v0); \ + mov v0, a1; \ + /* Write back its negation, to indicate that the pid value is \ + uninitialized in the the child, and in the window between \ + here and the point at which we restore the value. */ \ + negl a2, t0; \ + stl t0, PID_OFFSET(v0); + +PSEUDO (__vfork, vfork, 0) + + /* If we're back in the parent, restore the saved pid. */ + beq v0, 1f + stl a2, PID_OFFSET(a1) +1: ret + +PSEUDO_END (__vfork) + +weak_alias (__vfork, vfork) |