sys/arch/sparc/include/frame.h

   1 /*      $NetBSD: frame.h,v 1.6 2005/12/11 12:19:05 christos 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 #if defined(_KERNEL_OPT)
  44 #include "opt_sparc_arch.h"
  45 #endif
  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 #ifndef SUN4U
  57 struct frame {
  58         int32_t fr_local[8];    /* space to save locals (%l0..%l7) */
  59         int32_t fr_arg[6];      /* space to save arguments (%i0..%i5) */
  60         struct  frame *fr_fp;   /* space to save frame pointer (%i6) */
  61         int32_t fr_pc;          /* space to save return pc (%i7) */
  62         /*
  63          * SunOS reserves another 8 words here; this is pointless
  64          * but we do it for compatibility.
  65          */
  66         int32_t fr_xxx;         /* `structure return pointer' (unused) */
  67         int32_t fr_argd[6];     /* `arg dump area' (lunacy) */
  68         int32_t fr_argx[1];     /* arg extension (args 7..n; variable size) */
  69 };
  70 #else
  71 struct frame32 {
  72         int32_t fr_local[8];    /* space to save locals (%l0..%l7) */
  73         int32_t fr_arg[6];      /* space to save arguments (%i0..%i5) */
  74         uint32_t        fr_fp;  /* space to save frame pointer (%i6) */
  75         uint32_t        fr_pc;  /* space to save return pc (%i7) */
  76         /*
  77          * SunOS reserves another 8 words here; this is pointless
  78          * but we do it for compatibility.
  79          */
  80         int32_t fr_xxx;         /* `structure return pointer' (unused) */
  81         int32_t fr_argd[6];     /* `arg dump area' (lunacy) */
  82         int32_t fr_argx[1];     /* arg extension (args 7..n; variable size) */
  83 };
  84 #endif
  85 #endif
  86
  87 /*
  88  * CCFSZ (C Compiler Frame SiZe) is the size of a stack frame required if
  89  * a function is to call C code.  It should be just 64, but Sun defined
  90  * their frame with space to hold arguments 0 through 5 (plus some junk),
  91  * and varargs routines (such as kprintf) demand this, and gcc uses this
  92  * area at times anyway.
  93  */
  94 #define CCFSZ           96
  95
  96 /*
  97  * Sparc v9 stack frame format.
  98  *
  99  * Note that the contents of each stack frame may be held only in
 100  * machine register windows.  In order to get an accurate picture
 101  * of the frame, you must first force the kernel to write any such
 102  * windows to the stack.
 103  *
 104  * V9 frames have an odd bias, so you can tall a v9 frame from
 105  * a v8 frame by testing the stack pointer's lsb.
 106  */
 107 #if !defined(_LOCORE) && !defined(_LIBC)
 108 struct frame64 {
 109         int64_t fr_local[8];    /* space to save locals (%l0..%l7) */
 110         int64_t fr_arg[6];      /* space to save arguments (%i0..%i5) */
 111         uint64_t        fr_fp;          /* space to save frame pointer (%i6) */
 112         uint64_t        fr_pc;          /* space to save return pc (%i7) */
 113         /*
 114          * SVR4 reserves a bunch of extra stuff.
 115          */
 116         int64_t fr_argd[6];     /* `register save area' (lunacy) */
 117         int64_t fr_argx[0];     /* arg extension (args 7..n; variable size) */
 118 };
 119
 120 #define v9next_frame(f)         ((struct frame64*)(f->fr_fp+BIAS))
 121 #endif
 122
 123 /*
 124  * CC64FSZ (C Compiler 64-bit Frame SiZe) is the size of a stack frame used
 125  * by the compiler in 64-bit mode.  It is (16)*8; space for 8 ins, 8 outs.
 126  */
 127 #define CC64FSZ         176
 128
 129 /*
 130  * v9 stacks all have a bias of 2047 added to the %sp and %fp, so you can easily
 131  * detect it by testing the register for an odd value.  Why 2K-1 I don't know.
 132  */
 133 #define BIAS    (2048-1)
 134