Annotation of sys/compat/vax1k/vax1k_exec.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vax1k_exec.c,v 1.2 2002/03/14 01:26:51 millert Exp $ */
2: /* $NetBSD: vax1k_exec.c,v 1.1 1998/08/21 13:25:47 ragge Exp $ */
3:
4: /*
5: * Copyright (c) 1993, 1994 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: /*
35: * Exec glue to provide compatibility with older NetBSD vax1k exectuables.
36: *
37: * Because NetBSD/vax now uses 4k page size, older binaries (that started
38: * on an 1k boundary) cannot be mmap'ed. Therefore they are read in
39: * (via vn_rdwr) as OMAGIC binaries and executed. This will use a little
40: * bit more memory, but otherwise won't affect the execution speed.
41: */
42:
43: #include <sys/param.h>
44: #include <sys/systm.h>
45: #include <sys/proc.h>
46: #include <sys/malloc.h>
47: #include <sys/vnode.h>
48: #include <sys/exec.h>
49: #include <sys/resourcevar.h>
50:
51: #include <compat/vax1k/vax1k_exec.h>
52:
53: int exec_vax1k_prep_anymagic(struct proc *, struct exec_package *, int);
54:
55: /*
56: * exec_vax1k_makecmds(): Check if it's an a.out-format executable
57: * with an vax1k magic number.
58: *
59: * Given a proc pointer and an exec package pointer, see if the referent
60: * of the epp is in a.out format. Just check 'standard' magic numbers for
61: * this architecture.
62: *
63: * This function, in the former case, or the hook, in the latter, is
64: * responsible for creating a set of vmcmds which can be used to build
65: * the process's vm space and inserting them into the exec package.
66: */
67:
68: int
69: exec_vax1k_makecmds(p, epp)
70: struct proc *p;
71: struct exec_package *epp;
72: {
73: u_long midmag, magic;
74: u_short mid;
75: int error;
76: struct exec *execp = epp->ep_hdr;
77:
78: if (epp->ep_hdrvalid < sizeof(struct exec))
79: return ENOEXEC;
80:
81: midmag = ntohl(execp->a_midmag);
82: mid = (midmag >> 16) & 0x3ff;
83: magic = midmag & 0xffff;
84:
85: midmag = mid << 16 | magic;
86:
87: switch (midmag) {
88: case (MID_VAX1K << 16) | ZMAGIC:
89: error = exec_vax1k_prep_anymagic(p, epp, 0);
90: break;
91:
92: case (MID_VAX1K << 16) | NMAGIC:
93: case (MID_VAX1K << 16) | OMAGIC:
94: error = exec_vax1k_prep_anymagic(p, epp, sizeof(struct exec));
95: break;
96:
97: default:
98: error = ENOEXEC;
99: }
100:
101: if (error)
102: kill_vmcmds(&epp->ep_vmcmds);
103:
104: return error;
105: }
106:
107: /*
108: * exec_vax1k_prep_anymagic(): Prepare an vax1k ?MAGIC binary's exec package
109: *
110: * First, set of the various offsets/lengths in the exec package.
111: * Note that all code is mapped RW; no protection, but because it is
112: * only used for compatibility it won't hurt.
113: *
114: */
115: int
116: exec_vax1k_prep_anymagic(p, epp, off)
117: struct proc *p;
118: struct exec_package *epp;
119: int off;
120: {
121: long etmp, tmp;
122: struct exec *execp = epp->ep_hdr;
123:
124: epp->ep_taddr = execp->a_entry & ~(VAX1K_USRTEXT - 1);
125: epp->ep_tsize = execp->a_text + execp->a_data;
126: epp->ep_daddr = epp->ep_tsize + epp->ep_taddr;
127: epp->ep_dsize = execp->a_bss;
128: epp->ep_entry = execp->a_entry;
129:
130: /* set up command for text segment */
131: NEW_VMCMD(&epp->ep_vmcmds, vax1k_map_readvn,
132: epp->ep_tsize, epp->ep_taddr, epp->ep_vp, off,
133: VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE);
134:
135: tmp = round_page(epp->ep_daddr);
136: etmp = execp->a_bss - (tmp - epp->ep_daddr);
137:
138: /* set up command for bss segment */
139: if (etmp > 0)
140: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, etmp, tmp, NULLVP, 0,
141: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
142:
143: return exec_setup_stack(p, epp);
144: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to vax1k_exec.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / compat / vax1k