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Fix NULL ucontext->uc_link handling on sparc64.
* 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.
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ChangeLog
11
ChangeLog
@ -1,3 +1,14 @@
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2012-11-07 David S. Miller <davem@davemloft.net>
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* sysdeps/unix/sysv/linux/sparc/sparc64/__start_context.S: New file.
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* sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c
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(__start_context): Declare.
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(__makecontext_ret): Delete.
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(__makecontext): Hook up __start_context instead of
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__makecontext_ret.
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* sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
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(sysdep_routines): Add __start_context when in stdlib.
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2012-11-07 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/x86/Makefile ($(objpfx)tst-xmmymm.out): Pass $(NM),
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@ -3,3 +3,7 @@ default-abi := 64
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sysdep-CFLAGS += -fcall-used-g6
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LD += -melf64_sparc
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ifeq ($(subdir),stdlib)
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sysdep_routines += __start_context
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endif
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36
sysdeps/unix/sysv/linux/sparc/sparc64/__start_context.S
Normal file
36
sysdeps/unix/sysv/linux/sparc/sparc64/__start_context.S
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@ -0,0 +1,36 @@
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/* Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.text
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/* This is the helper code which gets called if a function which is
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registered with 'makecontext' returns. In this case we have to
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install the context listed in the uc_link element of the context
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'makecontext' manipulated at the time of the 'makecontext' call.
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If the pointer is NULL the process must terminate. */
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ENTRY(__start_context)
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brz,pn %i0, 1f
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mov 1, %o1
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call __setcontext
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mov %i0, %o0
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1: call HIDDEN_JUMPTARGET(exit)
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mov 0, %o0
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unimp 0
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END(__start_context)
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@ -21,6 +21,8 @@
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#include <stdlib.h>
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#include <ucontext.h>
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extern void __start_context (struct ucontext *ucp);
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void
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__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
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{
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@ -37,7 +39,7 @@ __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
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ucp->uc_mcontext.mc_gregs[MC_PC] = (long) func;
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ucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) func) + 4;
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ucp->uc_mcontext.mc_gregs[MC_O6] = ((long) sp) - 0x7ff;
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ucp->uc_mcontext.mc_gregs[MC_O7] = ((long) __makecontext_ret) - 8;
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ucp->uc_mcontext.mc_gregs[MC_O7] = ((long) __start_context) - 8;
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ucp->uc_mcontext.mc_fp = ((long) topsp) - 0x7ff;
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ucp->uc_mcontext.mc_i7 = 0;
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topsp[14] = 0;
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@ -52,15 +54,4 @@ __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
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va_end (ap);
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}
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asm (" \n\
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.text \n\
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.type __makecontext_ret, #function \n\
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__makecontext_ret: \n\
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mov 1, %o1 \n\
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call __setcontext \n\
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mov %i0, %o0 \n\
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unimp 0 \n\
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.size __makecontext_ret, .-__makecontext_ret \n\
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");
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weak_alias (__makecontext, makecontext)
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