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_ */