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Current File : //sys/powerpc/include/frame.h |
/*- * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $ * $FreeBSD: release/9.1.0/sys/powerpc/include/frame.h 219718 2011-03-17 19:44:00Z andreast $ */ #ifndef _MACHINE_FRAME_H_ #define _MACHINE_FRAME_H_ #include <sys/types.h> /* * We have to save all registers on every trap, because * 1. user could attach this process every time * 2. we must be able to restore all user registers in case of fork * Actually, we do not save the fp registers on trap, since * these are not used by the kernel. They are saved only when switching * between processes using the FPU. * * Change ordering to cluster together these register_t's. XXX */ struct trapframe { register_t fixreg[32]; register_t lr; register_t cr; register_t xer; register_t ctr; register_t srr0; register_t srr1; register_t exc; union { struct { /* dar & dsisr are only filled on a DSI trap */ register_t dar; register_t dsisr; } aim; struct { register_t dear; register_t esr; register_t dbcr0; } booke; } cpu; }; /* * FRAMELEN is the size of the stack region used by the low-level trap * handler. It is the size of its data (trapframe) plus the callframe * header (sizeof(struct callframe) - 3 register widths). It must also * be 16-byte aligned. */ #define FRAMELEN roundup(sizeof(struct trapframe) + \ sizeof(struct callframe) - 3*sizeof(register_t), 16) #define trapframe(td) ((td)->td_frame) /* * Call frame for PowerPC used during fork. */ #ifdef __powerpc64__ struct callframe { register_t cf_dummy_fp; /* dummy frame pointer */ register_t cf_cr; register_t cf_lr; register_t cf_compiler; register_t cf_linkeditor; register_t cf_toc; register_t cf_func; register_t cf_arg0; register_t cf_arg1; }; #else struct callframe { register_t cf_dummy_fp; /* dummy frame pointer */ register_t cf_lr; /* space for link register save */ register_t cf_func; register_t cf_arg0; register_t cf_arg1; }; #endif /* Definitions for syscalls */ #define FIRSTARG 3 /* first arg in reg 3 */ #define NARGREG 8 /* 8 args in regs */ #define MOREARGS(sp) ((caddr_t)((uintptr_t)(sp) + \ sizeof(struct callframe) - 3*sizeof(register_t))) /* more args go here */ #endif /* _MACHINE_FRAME_H_ */