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