4a98d8b095
ultimate trigger for the follow-up fixes in revisions 1.78, 1.80, 1.81 and 1.82 of trap.c. I was simply too pre-occupied with the gateway page and how it blurs kernel space with user space and vice versa that I couldn't see that it was all a load of bollocks. It's not the IP address that matters, it's the privilege level that counts. We never run in user space with lifted permissions and we sure can not run in kernel space without it. Sure, the gateway page is the exception, but not if you look at the privilege level. It's user space if you run with user permissions and kernel space otherwise. So, we're back to looking at the privilege level like it should be. There's no other way. Pointy hat: marcel
102 lines
3.6 KiB
C
102 lines
3.6 KiB
C
/* $FreeBSD$ */
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/* From: NetBSD: cpu.h,v 1.18 1997/09/23 23:17:49 mjacob Exp */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: cpu.h 1.16 91/03/25$
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*
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* @(#)cpu.h 8.4 (Berkeley) 1/5/94
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*/
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#ifndef _MACHINE_CPU_H_
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#define _MACHINE_CPU_H_
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#include <machine/frame.h>
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/*
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* Arguments to hardclock and gatherstats encapsulate the previous machine
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* state in an opaque clockframe.
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*/
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struct clockframe {
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struct trapframe cf_tf;
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};
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#define CLKF_PC(cf) ((cf)->cf_tf.tf_special.iip)
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#define CLKF_CPL(cf) ((cf)->cf_tf.tf_special.psr & IA64_PSR_CPL)
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#define CLKF_USERMODE(cf) (CLKF_CPL(cf) == IA64_PSR_CPL_USER)
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#define TRAPF_PC(tf) ((tf)->tf_special.iip)
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#define TRAPF_CPL(tf) ((tf)->tf_special.psr & IA64_PSR_CPL)
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#define TRAPF_USERMODE(tf) (TRAPF_CPL(tf) == IA64_PSR_CPL_USER)
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/*
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* CTL_MACHDEP definitions.
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*/
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#define CPU_CONSDEV 1 /* dev_t: console terminal device */
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#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
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#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
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#define CPU_WALLCLOCK 4 /* int: indicates wall CMOS clock */
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#define CPU_MAXID 5 /* valid machdep IDs */
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#define CTL_MACHDEP_NAMES { \
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{ 0, 0 }, \
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{ "console_device", CTLTYPE_STRUCT }, \
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{ "adjkerntz", CTLTYPE_INT }, \
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{ "disable_rtc_set", CTLTYPE_INT }, \
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{ "wall_cmos_clock", CTLTYPE_INT }, \
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}
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#ifdef _KERNEL
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/*
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* Return contents of in-cpu fast counter as a sort of "bogo-time"
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* for non-critical timing.
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*/
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#define get_cyclecount ia64_get_itc
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/* Used by signaling code. */
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#define cpu_getstack(td) ((td)->td_frame->tf_special.sp)
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void cpu_halt(void);
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void cpu_reset(void);
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void fork_trampoline(void); /* MAGIC */
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void swi_vm(void *);
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#endif /* _KERNEL */
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#endif /* _MACHINE_CPU_H_ */
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