6297a3d843
setting SV_SHP flag and providing pointer to the vm object and mapping address. Provide simple allocator to carve space in the page, tailored to put the code with alignment restrictions. Enable shared page use for amd64, both native and 32bit FreeBSD binaries. Page is private mapped at the top of the user address space, moving a start of the stack one page down. Move signal trampoline code from the top of the stack to the shared page. Reviewed by: alc
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*-
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* Copyright (c) 1998-1999 Andrew Gallatin
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _COMPAT_IA32_IA32_UTIL_H
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#define _COMPAT_IA32_IA32_UTIL_H
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/cdefs.h>
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#ifdef __ia64__
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#define FREEBSD32_MAXUSER ((1ul << 32) - IA32_PAGE_SIZE * 2)
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#define FREEBSD32_SHAREDPAGE 0
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#define FREEBSD32_USRSTACK FREEBSD32_MAXUSER
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#else
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#define FREEBSD32_MAXUSER ((1ul << 32) - IA32_PAGE_SIZE)
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#define FREEBSD32_SHAREDPAGE (FREEBSD32_MAXUSER - IA32_PAGE_SIZE)
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#define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
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#endif
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#define IA32_PAGE_SIZE 4096
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#define IA32_MAXDSIZ (512*1024*1024) /* 512MB */
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#define IA32_MAXSSIZ (64*1024*1024) /* 64MB */
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#define IA32_MAXVMEM 0 /* Unlimited */
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struct syscall_args;
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int ia32_fetch_syscall_args(struct thread *td, struct syscall_args *sa);
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void ia32_set_syscall_retval(struct thread *, int);
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#endif
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