/* Copyright (C) 2001 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Jakub Jelinek <jakub@redhat.com>.    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, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */ #include <ucontext.h> #define UC_M_PC 40#define UC_M_NPC 48 extern int __getcontext (ucontext_t *ucp);extern int __setcontext (const ucontext_t *ucp, int restoremask); intswapcontext (ucontext_t *oucp, const ucontext_t *ucp){  extern void __swapcontext_ret (void);  /* Save the current machine context to oucp.  */  __getcontext (oucp);  /* Modify oucp to skip the __setcontext call on reactivation.  */  *(long*)((char*)oucp+UC_M_PC) = (long)__swapcontext_ret;  *(long*)((char*)oucp+UC_M_NPC) = (long)__swapcontext_ret + 4;  /* Restore the machine context in ucp.  */  __setcontext (ucp, 1);  return 0;} asm ("							\n\	.text						\n\	.type	__swapcontext_ret, #function		\n\__swapcontext_ret:					\n\	return	%i7 + 8					\n\	 clr	%o0					\n\	.size	__swapcontext_ret, .-__swapcontext_ret	\n\     ");