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Annotation of sys/arch/sparc64/include/frame.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: frame.h,v 1.5 2006/06/21 20:52:18 jason Exp $ */
                      2: /*     $NetBSD: frame.h,v 1.9 2001/03/04 09:28:35 mrg Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1992, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This software was developed by the Computer Systems Engineering group
                      9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
                     10:  * contributed to Berkeley.
                     11:  *
                     12:  * All advertising materials mentioning features or use of this software
                     13:  * must display the following acknowledgement:
                     14:  *     This product includes software developed by the University of
                     15:  *     California, Lawrence Berkeley Laboratory.
                     16:  *
                     17:  * Redistribution and use in source and binary forms, with or without
                     18:  * modification, are permitted provided that the following conditions
                     19:  * are met:
                     20:  * 1. Redistributions of source code must retain the above copyright
                     21:  *    notice, this list of conditions and the following disclaimer.
                     22:  * 2. Redistributions in binary form must reproduce the above copyright
                     23:  *    notice, this list of conditions and the following disclaimer in the
                     24:  *    documentation and/or other materials provided with the distribution.
                     25:  * 3. Neither the name of the University nor the names of its contributors
                     26:  *    may be used to endorse or promote products derived from this software
                     27:  *    without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     39:  * SUCH DAMAGE.
                     40:  *
                     41:  *     @(#)frame.h     8.1 (Berkeley) 6/11/93
                     42:  */
                     43:
                     44: #ifndef _SPARC64_FRAME_H_
                     45: #define _SPARC64_FRAME_H_
                     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: /*
                     72:  * CCFSZ (C Compiler Frame SiZe) is the size of a stack frame required if
                     73:  * a function is to call C code.  It should be just 64, but Sun defined
                     74:  * their frame with space to hold arguments 0 through 5 (plus some junk),
                     75:  * and varargs routines (such as kprintf) demand this, and gcc uses this
                     76:  * area at times anyway.
                     77:  */
                     78: #define CCFSZ          96
                     79:
                     80: /*
                     81:  * Sparc v9 stack frame format.
                     82:  *
                     83:  * Note that the contents of each stack frame may be held only in
                     84:  * machine register windows.  In order to get an accurate picture
                     85:  * of the frame, you must first force the kernel to write any such
                     86:  * windows to the stack.
                     87:  *
                     88:  * V9 frames have an odd bias, so you can tall a v9 frame from
                     89:  * a v8 frame by testing the stack pointer's lsb.
                     90:  */
                     91: #if !defined(_LOCORE) && !defined(_LIBC)
                     92: struct frame64 {
                     93:        int64_t fr_local[8];    /* space to save locals (%l0..%l7) */
                     94:        int64_t fr_arg[6];      /* space to save arguments (%i0..%i5) */
                     95:        u_int64_t       fr_fp;          /* space to save frame pointer (%i6) */
                     96:        u_int64_t       fr_pc;          /* space to save return pc (%i7) */
                     97:        /*
                     98:         * SVR4 reserves a bunch of extra stuff.
                     99:         */
                    100:        int64_t fr_argd[6];     /* `register save area' (lunacy) */
                    101:        int64_t fr_argx[0];     /* arg extension (args 7..n; variable size) */
                    102: };
                    103:
                    104: #define v9next_frame(f)                ((struct frame64*)(f->fr_fp+BIAS))
                    105: #endif
                    106:
                    107: /*
                    108:  * CC64FSZ (C Compiler 64-bit Frame SiZe) is the size of a stack frame used
                    109:  * by the compiler in 64-bit mode.  It is (16)*8; space for 8 ins, 8 outs.
                    110:  */
                    111: #define CC64FSZ                176
                    112:
                    113: /*
                    114:  * v9 stacks all have a bias of 2047 added to the %sp and %fp, so you can easily
                    115:  * detect it by testing the register for an odd value.  Why 2K-1 I don't know.
                    116:  */
                    117: #define BIAS   (2048-1)
                    118:
                    119: #endif /* _SPARC64_FRAME_H_ */