4.4BSD/usr/src/sys/vax/include/frame.h

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/*-
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * This module is believed to contain source code proprietary to AT&T.
 * Use and redistribution is subject to the Berkeley Software License
 * Agreement and your Software Agreement with AT&T (Western Electric).
 *
 *	@(#)frame.h	7.2 (Berkeley) 5/8/91
 */

/*
 * Definition of the vax calls/callg frame.
 */
struct frame {
	int	fr_handler;
	u_int	fr_psw:16,		/* saved psw */
		fr_mask:12,		/* register save mask */
		:1,
		fr_s:1,			/* call was a calls, not callg */
		fr_spa:2;		/* stack pointer alignment */
	int	fr_savap;		/* saved arg pointer */
	int	fr_savfp;		/* saved frame pointer */
	int	fr_savpc;		/* saved program counter */
};