freebsd-dev/sys/sparc64/include/md_var.h
John Baldwin 7d9ace1d46 Add a small API to manage the MD user trap structures. Specifically, we
now use a pool mutex to manage the reference counts.  This fixes races
resulting in use-after-free.

Tested by:	kris, David Cornejo dave at dogwood dot com
Reported by:	bmilekic's MemGuard
MFC after:	1 week
2005-01-19 18:24:07 +00:00

64 lines
2.4 KiB
C

/*-
* Copyright (c) 1995 Bruce D. Evans.
* 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. Neither the name of the author nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* from: FreeBSD: src/sys/i386/include/md_var.h,v 1.40 2001/07/12
* $FreeBSD$
*/
#ifndef _MACHINE_MD_VAR_H_
#define _MACHINE_MD_VAR_H_
typedef void cpu_block_copy_t(const void *src, void *dst, size_t len);
typedef void cpu_block_zero_t(void *dst, size_t len);
extern char tl0_base[];
extern char _end[];
extern long Maxmem;
extern vm_offset_t kstack0;
extern vm_paddr_t kstack0_phys;
struct pcpu;
struct md_utrap;
void cpu_identify(u_long vers, u_int clock, u_int id);
void cpu_setregs(struct pcpu *pc);
int is_physical_memory(vm_paddr_t addr);
struct md_utrap *utrap_alloc(void);
void utrap_free(struct md_utrap *ut);
struct md_utrap *utrap_hold(struct md_utrap *ut);
cpu_block_copy_t spitfire_block_copy;
cpu_block_zero_t spitfire_block_zero;
extern cpu_block_copy_t *cpu_block_copy;
extern cpu_block_zero_t *cpu_block_zero;
#endif /* !_MACHINE_MD_VAR_H_ */