frame.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
    5  * Copyright (C) 1995, 1996 TooLs GmbH.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by TooLs GmbH.
   19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  *      $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _MACHINE_FRAME_H_
   38 #define _MACHINE_FRAME_H_
   39 
   40 #include <sys/types.h>
   41 
   42 /*
   43  * We have to save all registers on every trap, because
   44  *      1. user could attach this process every time
   45  *      2. we must be able to restore all user registers in case of fork
   46  * Actually, we do not save the fp registers on trap, since
   47  * these are not used by the kernel. They are saved only when switching
   48  * between processes using the FPU.
   49  *
   50  * Change ordering to cluster together these register_t's.              XXX
   51  */
   52 struct trapframe {
   53         register_t fixreg[32];
   54         register_t lr;
   55         register_t cr;
   56         register_t xer;
   57         register_t ctr;
   58         register_t srr0;
   59         register_t srr1;
   60         register_t exc;
   61         register_t dar; /* DAR/DEAR filled in on DSI traps */
   62         union {
   63                 struct {
   64                         /* dsisr only filled on a DSI trap */
   65                         register_t dsisr;
   66                 } aim;
   67                 struct {
   68                         register_t esr;
   69                         register_t dbcr0;
   70                 } booke;
   71         } cpu;
   72 };
   73 
   74 /*
   75  * FRAMELEN is the size of the stack region used by the low-level trap
   76  * handler. It is the size of its data (trapframe) plus the callframe
   77  * header (sizeof(struct callframe) - 3 register widths). It must also
   78  * be 16-byte aligned.
   79  */
   80 #define FRAMELEN        roundup(sizeof(struct trapframe) + \
   81                             sizeof(struct callframe) - 3*sizeof(register_t), 16)
   82 #define trapframe(td)   ((td)->td_frame)
   83 
   84 /*
   85  * Call frame for PowerPC used during fork.
   86  */
   87 #ifdef __powerpc64__
   88 struct callframe {
   89         register_t      cf_dummy_fp;    /* dummy frame pointer */
   90         register_t      cf_cr;
   91         register_t      cf_lr;
   92         register_t      cf_compiler;
   93         register_t      cf_linkeditor;
   94         register_t      cf_toc;
   95         register_t      cf_func;
   96         register_t      cf_arg0;
   97         register_t      cf_arg1;
   98         register_t      _padding;       /* Maintain 16-byte alignment */
   99 };
  100 #else
  101 struct callframe {
  102         register_t      cf_dummy_fp;    /* dummy frame pointer */
  103         register_t      cf_lr;          /* space for link register save */
  104         register_t      cf_func;
  105         register_t      cf_arg0;
  106         register_t      cf_arg1;
  107         register_t      _padding;       /* Maintain 16-byte alignment */
  108 };
  109 #endif
  110 
  111 /* Definitions for syscalls */
  112 #define FIRSTARG        3                               /* first arg in reg 3 */
  113 #define NARGREG         8                               /* 8 args in regs */
  114 
  115 #endif  /* _MACHINE_FRAME_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/include/frame.h

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/frame.h