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Revision 1.14, Mon Aug 11 21:51:14 2008 UTC (15 years, 8 months ago) by skrll
Branch: MAIN
CVS Tags: yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, yamt-nfs-mp-base9, yamt-nfs-mp-base8, yamt-nfs-mp-base7, yamt-nfs-mp-base6, yamt-nfs-mp-base5, yamt-nfs-mp-base4, yamt-nfs-mp-base3, yamt-nfs-mp-base11, yamt-nfs-mp-base10, wrstuden-revivesa-base-4, wrstuden-revivesa-base-3, wrstuden-revivesa-base-2, uebayasi-xip-base7, uebayasi-xip-base6, uebayasi-xip-base5, uebayasi-xip-base4, uebayasi-xip-base3, uebayasi-xip-base2, uebayasi-xip-base1, uebayasi-xip-base, uebayasi-xip, tls-maxphys-base-20171202, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, rmind-uvmplock-nbase, rmind-uvmplock-base, rmind-uvmplock, rmind-smpnet-nbase, rmind-smpnet-base, rmind-smpnet, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, nick-nhusb-base-20170825, nick-nhusb-base-20170204, nick-nhusb-base-20161204, nick-nhusb-base-20161004, nick-nhusb-base-20160907, nick-nhusb-base-20160529, nick-nhusb-base-20160422, nick-nhusb-base-20160319, nick-nhusb-base-20151226, nick-nhusb-base-20150921, nick-nhusb-base-20150606, nick-nhusb-base-20150406, nick-nhusb-base, nick-nhusb, nick-hppapmap-base4, nick-hppapmap-base3, nick-hppapmap-base2, nick-hppapmap-base, nick-hppapmap, netbsd-9-base, netbsd-9-3-RELEASE, netbsd-9-2-RELEASE, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, netbsd-5-base, netbsd-5-2-RELEASE, netbsd-5-2-RC1, netbsd-5-2-3-RELEASE, netbsd-5-2-2-RELEASE, netbsd-5-2-1-RELEASE, netbsd-5-2, netbsd-5-1-RELEASE, netbsd-5-1-RC4, netbsd-5-1-RC3, netbsd-5-1-RC2, netbsd-5-1-RC1, netbsd-5-1-5-RELEASE, netbsd-5-1-4-RELEASE, netbsd-5-1-3-RELEASE, netbsd-5-1-2-RELEASE, netbsd-5-1-1-RELEASE, netbsd-5-1, netbsd-5-0-RELEASE, netbsd-5-0-RC4, netbsd-5-0-RC3, netbsd-5-0-RC2, netbsd-5-0-RC1, netbsd-5-0-2-RELEASE, netbsd-5-0-1-RELEASE, netbsd-5-0, netbsd-5, mjf-devfs2-base, matt-premerge-20091211, matt-nb8-mediatek-base, matt-nb8-mediatek, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, matt-nb5-pq3-base, matt-nb5-pq3, matt-nb5-mips64-u2-k2-k4-k7-k8-k9, matt-nb5-mips64-u1-k1-k5, matt-nb5-mips64-premerge-20101231, matt-nb5-mips64-premerge-20091211, matt-nb5-mips64-k15, matt-nb5-mips64, matt-nb4-mips64-k7-u2a-k9b, matt-mips64-premerge-20101231, matt-mips64-base2, localcount-20160914, khorben-n900, jymxensuspend-base, jym-xensuspend-nbase, jym-xensuspend-base, jym-xensuspend, jruoho-x86intr-base, jruoho-x86intr, jmcneill-usbmp-pre-base2, jmcneill-usbmp-base9, jmcneill-usbmp-base8, jmcneill-usbmp-base7, jmcneill-usbmp-base6, jmcneill-usbmp-base5, jmcneill-usbmp-base4, jmcneill-usbmp-base3, jmcneill-usbmp-base2, jmcneill-usbmp-base10, jmcneill-usbmp-base, jmcneill-usbmp, jmcneill-audiomp3-base, jmcneill-audiomp3, jdolecek-ncq-base, jdolecek-ncq, isaki-audio2-base, isaki-audio2, is-mlppp-base, is-mlppp, haad-nbase2, haad-dm-base2, haad-dm-base1, haad-dm-base, cherry-xenmp-base, cherry-xenmp, bouyer-xenpvh-base2, bouyer-xenpvh-base1, bouyer-xenpvh-base, bouyer-xenpvh, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, bouyer-quota2-nbase, bouyer-quota2-base, bouyer-quota2, agc-symver-base, agc-symver, ad-namecache-base3, ad-namecache-base2, ad-namecache-base1, ad-namecache-base, ad-namecache, ad-audiomp2-base, ad-audiomp2
Branch point for: thorpej-futex
Changes since 1.13: +11 -7 lines 

Allow the asm line separator (default ';') to be overridden in the
RAS_*_ASM* macros.

/*	$NetBSD: ras.h,v 1.14 2008/08/11 21:51:14 skrll Exp $	*/

/*-
 * Copyright (c) 2002, 2004, 2007 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Gregory McGarry.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 THE FOUNDATION OR CONTRIBUTORS
 * 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.
 */

#ifndef _SYS_RAS_H_
#define _SYS_RAS_H_

#ifndef __ASSEMBLER__
#include <sys/types.h>
#include <sys/queue.h>

struct ras {
	struct ras	*ras_next;
	void		*ras_startaddr;
	void		*ras_endaddr;
};

#define RAS_INSTALL		0
#define RAS_PURGE		1
#define RAS_PURGE_ALL		2
#else
#include <sys/cdefs.h>
#endif /* __ASSEMBLER__ */

#ifdef _KERNEL

#ifndef __ASSEMBLER__
struct proc;

void	*ras_lookup(struct proc *, void *);
int	ras_fork(struct proc *, struct proc *);
int	ras_purgeall(void);
#endif /* __ASSEMBLER__ */

#else /* !_KERNEL */

#ifndef	RAS_DECL

#define	RAS_DECL(name)							\
extern void __CONCAT(name,_ras_start(void)), __CONCAT(name,_ras_end(void))

#endif	/* RAS_DECL */

/*
 * RAS_START and RAS_END contain implicit instruction reordering
 * barriers.  See __insn_barrier() in <sys/cdefs.h>.
 *
 * Note: You are strongly advised to avoid coding RASs in C. There is a
 * good chance the compiler will generate code which cannot be restarted.
 */
#define	RAS_START(name)							\
	__asm volatile(".globl " ___STRING(name) "_ras_start\n"	\
			 ___STRING(name) "_ras_start:" 			\
	    ::: "memory")

#define	RAS_END(name)							\
	__asm volatile(".globl " ___STRING(name) "_ras_end\n"		\
			 ___STRING(name) "_ras_end:"			\
	    ::: "memory")

#define	RAS_ADDR(name)	((void *)(uintptr_t) __CONCAT(name,_ras_start))
#define	RAS_SIZE(name)	((size_t)((uintptr_t) __CONCAT(name,_ras_end) -	\
				  (uintptr_t) __CONCAT(name,_ras_start)))

#ifndef __ASSEMBLER__
__BEGIN_DECLS
int rasctl(void *, size_t, int);
__END_DECLS

#else /* __ASSEMBLER__ */

#ifndef	_ASM_LS_CHAR
#define	_ASM_LS_CHAR	;
#endif

/*
 * RAS_START_ASM and RAS_END_ASM are for use within assembly code.
 * This is the prefered method of coding a RAS.
 */
#define	RAS_START_ASM(name)						\
	.globl _C_LABEL(__CONCAT(name,_ras_start))	 _ASM_LS_CHAR	\
	_C_LABEL(__CONCAT(name,_ras_start)):

#define	RAS_END_ASM(name)						\
	.globl _C_LABEL(__CONCAT(name,_ras_end)) 	_ASM_LS_CHAR	\
	_C_LABEL(__CONCAT(name,_ras_end)):

/*
 * RAS_START_ASM_HIDDEN and RAS_END_ASM_HIDDEN are similar to the above,
 * except that they limit the scope of the symbol such that it will not
 * be placed into the dynamic symbol table. Thus no other module (executable
 * or shared library) can reference it directly.
 */
#define	RAS_START_ASM_HIDDEN(name)					\
	.globl _C_LABEL(__CONCAT(name,_ras_start)) 	_ASM_LS_CHAR	\
	.hidden _C_LABEL(__CONCAT(name,_ras_start)) 	_ASM_LS_CHAR	\
	_C_LABEL(__CONCAT(name,_ras_start)):

#define	RAS_END_ASM_HIDDEN(name)					\
	.globl _C_LABEL(__CONCAT(name,_ras_end)) 	_ASM_LS_CHAR	\
	.hidden _C_LABEL(__CONCAT(name,_ras_end)) 	_ASM_LS_CHAR	\
	_C_LABEL(__CONCAT(name,_ras_end)):
#endif /* __ASSEMBLER__ */

#endif /* _KERNEL */

#endif /* !_SYS_RAS_H_ */