d034d459da
process is on the alternate stack or not. For compatibility with sigstack(2) state is being updated if such is needed. We now determine whether the process is on the alternate stack by looking at its stack pointer. This allows a process to siglongjmp from a signal handler on the alternate stack to the place of the sigsetjmp on the normal stack. When maintaining state, this would have invalidated the state information and causing a subsequent signal to be delivered on the normal stack instead of the alternate stack. PR: 22286
191 lines
6.9 KiB
C
191 lines
6.9 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 _ALPHA_CPU_H_
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#define _ALPHA_CPU_H_
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/*
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* Exported definitions unique to Alpha cpu support.
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*/
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#include <machine/frame.h>
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#define cpu_getstack(p) (alpha_pal_rdusp())
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/*
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* Arguments to hardclock and gatherstats encapsulate the previous
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* machine state in an opaque clockframe. One the Alpha, we use
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* what we push on an interrupt (a trapframe).
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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_USERMODE(framep) \
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(((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0)
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#define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC])
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#define CLKF_INTR(framep) (PCPU_GET(intr_nesting_level) >= 2)
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/*
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* Preempt the current process if in interrupt from user mode,
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* or after the current trap/syscall if in system mode.
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*/
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#define need_resched() do { want_resched = 1; aston(); } while (0)
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#define resched_wanted() want_resched
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/*
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* Give a profiling tick to the current process when the user profiling
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* buffer pages are invalid. On the hp300, request an ast to send us
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* through trap, marking the proc as needing a profiling tick.
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*/
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#define need_proftick(p) \
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do { (p)->p_flag |= P_OWEUPC; aston(); } while (0)
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/*
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* Notify the current process (p) that it has a signal pending,
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* process as soon as possible.
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*/
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#define signotify(p) aston()
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#define aston() PCPU_SET(astpending, 1)
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#ifdef _KERNEL
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extern u_int astpending;
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extern u_int32_t intr_nesting_level; /* bookeeping only; counts sw intrs */
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extern u_int32_t want_resched; /* resched() was called */
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#endif
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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_ROOT_DEVICE 2 /* string: root device name */
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#define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */
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#define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */
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#define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */
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#define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */
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#define CPU_ADJKERNTZ 7 /* int: timezone offset (seconds) */
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#define CPU_DISRTCSET 8 /* int: disable resettodr() call */
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#define CPU_WALLCLOCK 9 /* int: indicates wall CMOS clock */
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#define CPU_MAXID 9 /* 9 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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{ "root_device", CTLTYPE_STRING }, \
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{ "unaligned_print", CTLTYPE_INT }, \
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{ "unaligned_fix", CTLTYPE_INT }, \
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{ "unaligned_sigbus", CTLTYPE_INT }, \
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{ "booted_kernel", CTLTYPE_STRING }, \
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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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struct pcb;
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struct proc;
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struct reg;
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struct rpb;
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struct trapframe;
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extern struct rpb *hwrpb;
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extern volatile int mc_expected, mc_received;
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void XentArith __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentIF __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentInt __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentMM __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentRestart __P((void)); /* MAGIC */
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void XentSys __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentUna __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void alpha_init __P((u_long, u_long, u_long, u_long, u_long));
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int alpha_pa_access __P((u_long));
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void alpha_fpstate_check __P((struct proc *p));
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void alpha_fpstate_save __P((struct proc *p, int write));
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void alpha_fpstate_drop __P((struct proc *p));
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void alpha_fpstate_switch __P((struct proc *p));
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void ast __P((struct trapframe *));
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int badaddr __P((void *, size_t));
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int badaddr_read __P((void *, size_t, void *));
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void child_return __P((struct proc *p));
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u_int64_t console_restart __P((u_int64_t, u_int64_t, u_int64_t));
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void dumpconf __P((void));
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void exception_return __P((void)); /* MAGIC */
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void frametoreg __P((struct trapframe *, struct reg *));
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long fswintrberr __P((void)); /* MAGIC */
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void init_prom_interface __P((struct rpb*));
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void interrupt
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__P((unsigned long, unsigned long, unsigned long, struct trapframe *));
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void machine_check
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__P((unsigned long, struct trapframe *, unsigned long, unsigned long));
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u_int64_t hwrpb_checksum __P((void));
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void hwrpb_restart_setup __P((void));
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void regdump __P((struct trapframe *));
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void regtoframe __P((struct reg *, struct trapframe *));
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void savectx __P((struct pcb *));
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void set_iointr __P((void (*)(void *, unsigned long)));
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void switch_exit __P((struct proc *)); /* MAGIC */
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void switch_trampoline __P((void)); /* MAGIC */
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void syscall __P((u_int64_t, struct trapframe *));
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void trap __P((unsigned long, unsigned long, unsigned long, unsigned long,
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struct trapframe *));
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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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static __inline u_int64_t
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get_cyclecount(void)
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{
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return (alpha_rpcc());
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}
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#endif /* _KERNEL */
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#endif /* _ALPHA_CPU_H_ */
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