1 /* $OpenBSD: vax1k_subr.c,v 1.3 2005/11/06 22:21:33 miod Exp $ */
2 /* $NetBSD: vax1k_subr.c,v 1.2 1999/03/24 05:51:20 mrg Exp $ */
3
4 /*
5 * Copyright (c) 1993, 1994, 1996 Christopher G. Demetriou
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Christopher G. Demetriou.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/proc.h>
37 #include <sys/malloc.h>
38 #include <sys/vnode.h>
39 #include <sys/filedesc.h>
40 #include <sys/exec.h>
41 #include <sys/mman.h>
42
43 #include <compat/vax1k/vax1k_exec.h>
44
45 #include <uvm/uvm_extern.h>
46
47 /*
48 * vax1k_map_readvn():
49 * handle vmcmd which specifies that a vnode should be read from.
50 * This is used to be able to read in and execute vax1k binaries
51 * even if the page size is bigger. (cannot mmap).
52 */
53 int
54 vax1k_map_readvn(p, cmd)
55 struct proc *p;
56 struct exec_vmcmd *cmd;
57 {
58 vaddr_t oaddr;
59 int error;
60
61 if (cmd->ev_len == 0)
62 return (0);
63
64 oaddr = cmd->ev_addr;
65 cmd->ev_addr = trunc_page(cmd->ev_addr); /* required by uvm_map */
66 error = uvm_map(&p->p_vmspace->vm_map, &cmd->ev_addr,
67 round_page(cmd->ev_len + (oaddr - cmd->ev_addr)),
68 NULL, UVM_UNKNOWN_OFFSET, 0,
69 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY,
70 UVM_ADV_NORMAL,
71 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW));
72
73 if (error)
74 return error;
75
76 error = vn_rdwr(UIO_READ, cmd->ev_vp, (caddr_t)oaddr,
77 cmd->ev_len, cmd->ev_offset, UIO_USERSPACE, IO_UNIT,
78 p->p_ucred, NULL, p);
79 if (error)
80 return error;
81
82 if (cmd->ev_prot != (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)) {
83 /*
84 * we had to map in the area at PROT_ALL so that vn_rdwr()
85 * could write to it. however, the caller seems to want
86 * it mapped read-only, so now we are going to have to call
87 * uvm_map_protect() to fix up the protection. ICK.
88 */
89 return(uvm_map_protect(&p->p_vmspace->vm_map,
90 trunc_page(cmd->ev_addr),
91 round_page(cmd->ev_addr + cmd->ev_len),
92 cmd->ev_prot, FALSE));
93 }
94
95 return (0);
96 }