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frame.h revision 1.4 
      1 /*	$NetBSD: frame.h,v 1.4 1998/09/07 23:46:26 eeh 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. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by the University of
     27  *	California, Berkeley and its contributors.
     28  * 4. Neither the name of the University nor the names of its contributors
     29  *    may be used to endorse or promote products derived from this software
     30  *    without specific prior written permission.
     31  *
     32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     42  * SUCH DAMAGE.
     43  *
     44  *	@(#)frame.h	8.1 (Berkeley) 6/11/93
     45  */
     46 
     47 /*
     48  * Sparc stack frame format.
     49  *
     50  * Note that the contents of each stack frame may be held only in
     51  * machine register windows.  In order to get an accurate picture
     52  * of the frame, you must first force the kernel to write any such
     53  * windows to the stack.
     54  */
     55 #ifndef _LOCORE
     56 struct frame32 {
     57 	int32_t	fr_local[8];	/* space to save locals (%l0..%l7) */
     58 	int32_t	fr_arg[6];	/* space to save arguments (%i0..%i5) */
     59 	u_int32_t	fr_fp;	/* space to save frame pointer (%i6) */
     60 	u_int32_t	fr_pc;	/* space to save return pc (%i7) */
     61 	/*
     62 	 * SunOS reserves another 8 words here; this is pointless
     63 	 * but we do it for compatibility.
     64 	 */
     65 	int32_t	fr_xxx;		/* `structure return pointer' (unused) */
     66 	int32_t	fr_argd[6];	/* `arg dump area' (lunacy) */
     67 	int32_t	fr_argx[1];	/* arg extension (args 7..n; variable size) */
     68 };
     69 #endif
     70 /*
     71  * CCFSZ (C Compiler Frame SiZe) is the size of a stack frame required if
     72  * a function is to call C code.  It should be just 64, but Sun defined
     73  * their frame with space to hold arguments 0 through 5 (plus some junk),
     74  * and varargs routines (such as kprintf) demand this, and gcc uses this
     75  * area at times anyway.
     76  */
     77 #define CCFSZ		96
     78 #define STACK_ALIGN	8
     79 #define SA(X)	(((X)+(STACK_ALIGN-1))&~(STACK_ALIGN-1))
     80 
     81 
     82 /*
     83  * Sparc v9 stack frame format.
     84  *
     85  * Note that the contents of each stack frame may be held only in
     86  * machine register windows.  In order to get an accurate picture
     87  * of the frame, you must first force the kernel to write any such
     88  * windows to the stack.
     89  *
     90  * V9 frames have an odd bias, so you can tall a v9 frame from
     91  * a v8 frame by testing the stack pointer's lsb.
     92  */
     93 #ifndef _LOCORE
     94 struct frame64 {
     95 	int64_t	fr_local[8];	/* space to save locals (%l0..%l7) */
     96 	int64_t	fr_arg[6];	/* space to save arguments (%i0..%i5) */
     97 	u_int64_t	fr_fp;		/* space to save frame pointer (%i6) */
     98 	u_int64_t	fr_pc;		/* space to save return pc (%i7) */
     99 	/*
    100 	 * SVR4 reserves a bunch of extra stuff.
    101 	 */
    102 	int64_t	fr_argd[6];	/* `arg dump area' (lunacy) */
    103 	int64_t	fr_argx[1];	/* arg extension (args 7..n; variable size) */
    104 };
    105 #endif
    106 
    107 #define v9next_frame(f)		((struct frame64*)(f->fr_fp+BIAS))
    108 /*
    109  * CC64FSZ (C Compiler 64-bit Frame SiZe) is the size of a stack frame used
    110  * by the compiler in 64-bit mode.  It is (16+1+6)*8; space for 8 ins, 8 outs,
    111  * one "hidden parameter", and 6 extended words where the callee can save its
    112  * arguments.
    113  */
    114 #define CC64FSZ		176
    115 #define STACK_ALIGN64	16
    116 #define SA64(x)		(((x)+(STACK_ALIGN64-1))&~(STACK_ALIGN64-1))
    117 
    118 /*
    119  * v9 stacks all have a bias of 2047 added to the %sp and %fp, so you can easily
    120  * detect it by testing the register for an odd value.  Why 2K-1 I don't know.
    121  */
    122 #define BIAS	(2048-1)
    123 
    124