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 * $FreeBSD$ 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 */ 50 struct trapframe { 51 register_t fixreg[32]; 52 register_t lr; 53 register_t cr; 54 register_t xer; 55 register_t ctr; 56 register_t srr0; 57 register_t srr1; 58 register_t exc; 59 union { 60 struct { 61 /* dar & dsisr are only filled on a DSI trap */ 62 register_t dar; 63 register_t 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 * FRAMELEN is the size of the stack region used by the low-level trap 75 * handler. It is the size of its data (trapframe) plus the callframe 76 * header (sizeof(struct callframe) - 3 register widths). It must also 77 * be 16-byte aligned. 78 */ 79 #define FRAMELEN roundup(sizeof(struct trapframe) + \ 80 sizeof(struct callframe) - 3*sizeof(register_t), 16) 81 #define trapframe(td) ((td)->td_frame) 82 83 /* 84 * Call frame for PowerPC used during fork. 85 */ 86 #ifdef __powerpc64__ 87 struct callframe { 88 register_t cf_dummy_fp; /* dummy frame pointer */ 89 register_t cf_cr; 90 register_t cf_lr; 91 register_t cf_compiler; 92 register_t cf_linkeditor; 93 register_t cf_toc; 94 register_t cf_func; 95 register_t cf_arg0; 96 register_t cf_arg1; 97 }; 98 #else 99 struct callframe { 100 register_t cf_dummy_fp; /* dummy frame pointer */ 101 register_t cf_lr; /* space for link register save */ 102 register_t cf_func; 103 register_t cf_arg0; 104 register_t cf_arg1; 105 }; 106 #endif 107 108 /* Definitions for syscalls */ 109 #define FIRSTARG 3 /* first arg in reg 3 */ 110 #define NARGREG 8 /* 8 args in regs */ 111 #define MOREARGS(sp) ((caddr_t)((uintptr_t)(sp) + \ 112 sizeof(struct callframe) - 3*sizeof(register_t))) /* more args go here */ 113 114 #endif /* _MACHINE_FRAME_H_ */ 115