98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/* $NetBSD: vax1k_subr.c,v 1.2 1999/03/24 05:51:20 mrg Exp $ */
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/*
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* Copyright (c) 1993, 1994, 1996 Christopher G. Demetriou
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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. 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 Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without 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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/filedesc.h>
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#include <sys/exec.h>
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#include <sys/mman.h>
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#include <vm/vm.h>
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#include <compat/vax1k/vax1k_exec.h>
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#include <uvm/uvm_extern.h>
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/*
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* vax1k_map_readvn():
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* handle vmcmd which specifies that a vnode should be read from.
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* This is used to be able to read in and execute vax1k binaries
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* even if the page size is bigger. (cannot mmap).
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*/
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int
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vax1k_map_readvn(p, cmd)
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struct proc *p;
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struct exec_vmcmd *cmd;
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{
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vm_offset_t oaddr;
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int error;
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if (cmd->ev_len == 0)
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return(KERN_SUCCESS); /* XXXCDC: should it happen? */
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oaddr = cmd->ev_addr;
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cmd->ev_addr = trunc_page(cmd->ev_addr); /* required by uvm_map */
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error = uvm_map(&p->p_vmspace->vm_map, &cmd->ev_addr,
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round_page(cmd->ev_len + (oaddr - cmd->ev_addr)),
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NULL, UVM_UNKNOWN_OFFSET,
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UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY,
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UVM_ADV_NORMAL,
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UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW));
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if (error)
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return error;
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error = vn_rdwr(UIO_READ, cmd->ev_vp, (caddr_t)oaddr,
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cmd->ev_len, cmd->ev_offset, UIO_USERSPACE, IO_UNIT,
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p->p_ucred, NULL, p);
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if (error)
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return error;
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if (cmd->ev_prot != (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)) {
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/*
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* we had to map in the area at PROT_ALL so that vn_rdwr()
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* could write to it. however, the caller seems to want
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* it mapped read-only, so now we are going to have to call
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* uvm_map_protect() to fix up the protection. ICK.
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*/
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return(uvm_map_protect(&p->p_vmspace->vm_map,
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trunc_page(cmd->ev_addr),
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round_page(cmd->ev_addr + cmd->ev_len),
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cmd->ev_prot, FALSE));
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} else {
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return(KERN_SUCCESS);
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}
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}
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