122770Smckusick/*
222770Smckusick * Copyright (c) 1982 Regents of the University of California.
322770Smckusick * All rights reserved.  The Berkeley software License Agreement
422770Smckusick * specifies the terms and conditions for redistribution.
5*22779Smckusick *
6*22779Smckusick *	@(#)frame.rep	5.2 (Berkeley) 06/07/85
722770Smckusick */
85518Slinton
95518Slinton/*
105518Slinton * Definitions for accessing stack frames.
115518Slinton */
125518Slinton
135518Slinton#define MAINBLK		1
145518Slinton
155518Slinton/*
165518Slinton * Structure of an activation record's block mark.  See the
175518Slinton * PX implementation notes for more details.
185518Slinton */
195518Slinton
205518Slintonstruct frame {
215518Slinton	ADDRESS stackref;	/* for px self-checking */
225518Slinton	ADDRESS file;		/* current file information */
235518Slinton	ADDRESS blockp;		/* pointer to current block name */
245518Slinton	ADDRESS *save_loc;	/* saved local variable pointer */
255518Slinton	ADDRESS *save_disp;	/* saved dp contents */
265518Slinton	ADDRESS *save_dp;	/* saved dp */
275518Slinton	ADDRESS save_pc;	/* saved location counter */
285518Slinton	int save_lino;		/* saved source line number (never used) */
295518Slinton};
305518Slinton
315518SlintonFRAME *curframe();		/* get the currently active frame */
325518SlintonFRAME *nextframe();		/* go up the stack */
335518SlintonFRAME *findframe();		/* find the frame for a given function */
345518SlintonADDRESS entry();		/* get the entry address for a frame */
355518SlintonADDRESS *dispval();		/* display associated with a given block */
365518SlintonADDRESS *curdp();		/* return current display pointer */
375518SlintonADDRESS *contents();		/* return the contents of display pointer */
385518SlintonADDRESS stkaddr();		/* stack address associated with a frame */
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