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Fix NULL ucontext->uc_link handling on sparc64.

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* sysdeps/unix/sysv/linux/sparc/sparc64/__start_context.S: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c
	(__start_context): Declare.
	(__makecontext_ret): Delete.
	(__makecontext): Hook up __start_context instead of
	__makecontext_ret.
	* sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
	(sysdep_routines): Add __start_context when in stdlib.
This commit is contained in:
David S. Miller
2012-11-07 21:00:09 -08:00
parent 0fbb0fbc2e
commit 60e8270d6c
4 changed files with 54 additions and 12 deletions
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36
sysdeps/unix/sysv/linux/sparc/sparc64/__start_context.S Normal file
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@ -0,0 +1,36 @@
/* Copyright (C) 2012 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>
.text
/* This is the helper code which gets called if a function which is
registered with 'makecontext' returns. In this case we have to
install the context listed in the uc_link element of the context
'makecontext' manipulated at the time of the 'makecontext' call.
If the pointer is NULL the process must terminate. */
ENTRY(__start_context)
brz,pn %i0, 1f
mov 1, %o1
call __setcontext
mov %i0, %o0
1: call HIDDEN_JUMPTARGET(exit)
mov 0, %o0
unimp 0
END(__start_context)