1/*	$NetBSD: frame.h,v 1.11 2022/02/15 20:35:37 palle Exp $ */
  2
  3/*
  4 * Copyright (c) 1992, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  6 *
  7 * This software was developed by the Computer Systems Engineering group
  8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  9 * contributed to Berkeley.
 10 *
 11 * All advertising materials mentioning features or use of this software
 12 * must display the following acknowledgement:
 13 *	This product includes software developed by the University of
 14 *	California, Lawrence Berkeley Laboratory.
 15 *
 16 * Redistribution and use in source and binary forms, with or without
 17 * modification, are permitted provided that the following conditions
 18 * are met:
 19 * 1. Redistributions of source code must retain the above copyright
 20 *    notice, this list of conditions and the following disclaimer.
 21 * 2. Redistributions in binary form must reproduce the above copyright
 22 *    notice, this list of conditions and the following disclaimer in the
 23 *    documentation and/or other materials provided with the distribution.
 24 * 3. Neither the name of the University nor the names of its contributors
 25 *    may be used to endorse or promote products derived from this software
 26 *    without specific prior written permission.
 27 *
 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 38 * SUCH DAMAGE.
 39 *
 40 *	@(#)frame.h	8.1 (Berkeley) 6/11/93
 41 */
 42
 43#ifndef _SPARC_FRAME_H_
 44#define _SPARC_FRAME_H_
 45
 46#if defined(_KERNEL_OPT)
 47#include "opt_sparc_arch.h"
 48#endif
 49
 50/*
 51 * Sparc stack frame format.
 52 *
 53 * Note that the contents of each stack frame may be held only in
 54 * machine register windows.  In order to get an accurate picture
 55 * of the frame, you must first force the kernel to write any such
 56 * windows to the stack.
 57 */
 58#ifndef _LOCORE
 59#ifndef __sparc_v9__
 60struct frame {
 61	int32_t	fr_local[8];	/* space to save locals (%l0..%l7) */
 62	int32_t	fr_arg[6];	/* space to save arguments (%i0..%i5) */
 63	struct	frame *fr_fp;	/* space to save frame pointer (%i6) */
 64	int32_t	fr_pc;		/* space to save return pc (%i7) */
 65	/*
 66	 * SunOS reserves another 8 words here; this is pointless
 67	 * but we do it for compatibility.
 68	 */
 69	int32_t	fr_xxx;		/* `structure return pointer' (unused) */
 70	int32_t	fr_argd[6];	/* `arg dump area' (lunacy) */
 71	int32_t	fr_argx[1];	/* arg extension (args 7..n; variable size) */
 72};
 73#else
 74struct frame32 {
 75	int32_t	fr_local[8];	/* space to save locals (%l0..%l7) */
 76	int32_t	fr_arg[6];	/* space to save arguments (%i0..%i5) */
 77	uint32_t	fr_fp;	/* space to save frame pointer (%i6) */
 78	uint32_t	fr_pc;	/* space to save return pc (%i7) */
 79	/*
 80	 * SunOS reserves another 8 words here; this is pointless
 81	 * but we do it for compatibility.
 82	 */
 83	int32_t	fr_xxx;		/* `structure return pointer' (unused) */
 84	int32_t	fr_argd[6];	/* `arg dump area' (lunacy) */
 85	int32_t	fr_argx[1];	/* arg extension (args 7..n; variable size) */
 86};
 87#endif
 88#endif
 89
 90/*
 91 * CCFSZ (C Compiler Frame SiZe) is the size of a stack frame required if
 92 * a function is to call C code.  It should be just 64, but Sun defined
 93 * their frame with space to hold arguments 0 through 5 (plus some junk),
 94 * and varargs routines (such as kprintf) demand this, and gcc uses this
 95 * area at times anyway.
 96 */
 97#define CCFSZ		96
 98
 99/*
100 * Sparc v9 stack frame format.
101 *
102 * Note that the contents of each stack frame may be held only in
103 * machine register windows.  In order to get an accurate picture
104 * of the frame, you must first force the kernel to write any such
105 * windows to the stack.
106 *
107 * V9 frames have an odd bias, so you can tell a v9 frame from
108 * a v8 frame by testing the stack pointer's lsb.
109 */
110#if !defined(_LOCORE) && !defined(_LIBC)
111struct frame64 {
112	int64_t	fr_local[8];	/* space to save locals (%l0..%l7) */
113	int64_t	fr_arg[6];	/* space to save arguments (%i0..%i5) */
114	uint64_t	fr_fp;		/* space to save frame pointer (%i6) */
115	uint64_t	fr_pc;		/* space to save return pc (%i7) */
116	/*
117	 * SVR4 reserves a bunch of extra stuff.
118	 */
119	int64_t fr_argd[6];	/* `register save area' (lunacy) */
120	int64_t	fr_argx[0];	/* arg extension (args 7..n; variable size) */
121};
122
123#define v9next_frame(f)		((struct frame64*)(f->fr_fp+BIAS))
124#endif
125
126/*
127 * CC64FSZ (C Compiler 64-bit Frame SiZe) is the size of a stack frame used
128 * by the compiler in 64-bit mode (see struct frame64 above).
129 * It is 8*8 + 6*8 + 8 + 8 + 6*8 + 0*8 = 176 bytes.
130 */
131#define CC64FSZ		176
132
133/*
134 * v9 stacks all have a bias of 2047 added to the %sp and %fp, so you can easily
135 * detect it by testing the register for an odd value.  Why 2K-1 I don't know.
136 */
137#define BIAS	(2048-1)
138
139#endif /* _SPARC_FRAME_H_ */