7d9ace1d46
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
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/*-
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* Copyright (c) 1995 Bruce D. Evans.
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* All rights reserved.
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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. Neither the name of the author nor the names of 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 AUTHOR 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 AUTHOR 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: FreeBSD: src/sys/i386/include/md_var.h,v 1.40 2001/07/12
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* $FreeBSD$
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*/
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#ifndef _MACHINE_MD_VAR_H_
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#define _MACHINE_MD_VAR_H_
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typedef void cpu_block_copy_t(const void *src, void *dst, size_t len);
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typedef void cpu_block_zero_t(void *dst, size_t len);
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extern char tl0_base[];
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extern char _end[];
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extern long Maxmem;
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extern vm_offset_t kstack0;
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extern vm_paddr_t kstack0_phys;
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struct pcpu;
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struct md_utrap;
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void cpu_identify(u_long vers, u_int clock, u_int id);
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void cpu_setregs(struct pcpu *pc);
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int is_physical_memory(vm_paddr_t addr);
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struct md_utrap *utrap_alloc(void);
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void utrap_free(struct md_utrap *ut);
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struct md_utrap *utrap_hold(struct md_utrap *ut);
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cpu_block_copy_t spitfire_block_copy;
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cpu_block_zero_t spitfire_block_zero;
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extern cpu_block_copy_t *cpu_block_copy;
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extern cpu_block_zero_t *cpu_block_zero;
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#endif /* !_MACHINE_MD_VAR_H_ */
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