getfp.c
上传用户:xiejiait
上传日期:2007-01-06
资源大小:881k
文件大小:1k
- /* @(#)getfp.c 1.9 99/09/11 Copyright 1988 J. Schilling */
- /*
- * Get frame pointer
- *
- * Copyright (c) 1988 J. Schilling
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <mconfig.h>
- #include <standard.h>
- #ifdef NO_SCANSTACK
- # ifdef HAVE_SCANSTACK
- # undef HAVE_SCANSTACK
- # endif
- #endif
- #ifdef HAVE_SCANSTACK
- #include <stkframe.h>
- #define MAXWINDOWS 32
- #define NWINDOWS 7
- #if defined(sparc) && defined(__GNUC__)
- # define IDX 3 /* some strange things on sparc gcc */
- #else
- # define IDX 1
- #endif
- void **getfp()
- {
- long **dummy[1];
- static int idx = IDX; /* fool optimizer in c compiler */
- #ifdef sparc
- flush_reg_windows(MAXWINDOWS-2);
- #endif
- return ((void **)((struct frame *)&dummy[idx])->fr_savfp);
- }
- #ifdef sparc
- int flush_reg_windows(n)
- int n;
- {
- if (--n > 0)
- flush_reg_windows(n);
- return (0);
- }
- #endif
- #endif /* HAVE_SCANSTACK */