frame.h revision 189100
1/*- 2 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3 * Copyright (C) 1995, 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $ 32 * $FreeBSD: head/sys/powerpc/include/frame.h 189100 2009-02-27 12:08:24Z raj $ 33 */ 34 35#ifndef _MACHINE_FRAME_H_ 36#define _MACHINE_FRAME_H_ 37 38#include <sys/types.h> 39 40/* 41 * We have to save all registers on every trap, because 42 * 1. user could attach this process every time 43 * 2. we must be able to restore all user registers in case of fork 44 * Actually, we do not save the fp registers on trap, since 45 * these are not used by the kernel. They are saved only when switching 46 * between processes using the FPU. 47 * 48 * Change ordering to cluster together these register_t's. XXX 49 */ 50struct trapframe { 51 register_t fixreg[32]; 52 register_t lr; 53 int cr; 54 int xer; 55 register_t ctr; 56 register_t srr0; 57 register_t srr1; 58 int exc; 59 union { 60 struct { 61 /* dar & dsisr are only filled on a DSI trap */ 62 register_t dar; 63 int dsisr; 64 } aim; 65 struct { 66 register_t dear; 67 register_t esr; 68 register_t dbcr0; 69 } booke; 70 } cpu; 71}; 72 73/* 74 * This is to ensure alignment of the stackpointer 75 */ 76#define FRAMELEN roundup(sizeof(struct trapframe) + 8, 16) 77#define trapframe(td) ((td)->td_frame) 78 79/* 80 * Call frame for PowerPC used during fork. 81 */ 82struct callframe { 83 register_t cf_dummy_fp; /* dummy frame pointer */ 84 register_t cf_lr; /* space for link register save */ 85 register_t cf_func; 86 register_t cf_arg0; 87 register_t cf_arg1; 88}; 89 90/* Definitions for syscalls */ 91#define FIRSTARG 3 /* first arg in reg 3 */ 92#define NARGREG 8 /* 8 args in regs */ 93#define MOREARGS(sp) ((caddr_t)((int)(sp) + 8)) /* more args go here */ 94 95#endif /* _MACHINE_FRAME_H_ */ 96