1 /* $NetBSD: exec_coff.c,v 1.7 2016/09/21 16:27:55 christos Exp $ */
2
3 /*
4 * Copyright (c) 1996 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __RCSID("$NetBSD: exec_coff.c,v 1.7 2016/09/21 16:27:55 christos Exp $");
35 #endif /* not lint */
36
37 #include <sys/param.h>
38 #include <sys/time.h>
39 #include <sys/proc.h>
40 #include <sys/types.h>
41 #include <stdio.h>
42 #include <string.h>
43 #include "extern.h"
44
45 #if defined(NLIST_COFF)
46 #include <sys/exec_coff.h>
47
48 #define check(off, size) ((off < 0) || (off + size > mappedsize))
49 #define BAD do { rv = -1; goto out; } while (0)
50
51 int
check_coff(const char * mappedfile,size_t mappedsize)52 check_coff(const char *mappedfile, size_t mappedsize)
53 {
54 const struct coff_exechdr *exechdrp;
55 int rv;
56
57 rv = 0;
58
59 if (check(0, sizeof *exechdrp))
60 BAD;
61 exechdrp = (const struct coff_exechdr *)&mappedfile[0];
62
63 if (COFF_BADMAG(&(exechdrp->f)))
64 BAD;
65
66 out:
67 return (rv);
68 }
69
70 int
findoff_coff(const char * mappedfile,size_t mappedsize,u_long vmaddr,size_t * fileoffp,u_long text_addr)71 findoff_coff(const char *mappedfile, size_t mappedsize, u_long vmaddr,
72 size_t *fileoffp, u_long text_addr)
73 {
74 const struct coff_exechdr *exechdrp;
75 int rv;
76
77 rv = 0;
78 exechdrp = (const struct coff_exechdr *)&mappedfile[0];
79
80 #define COFF_TXTOFF_XXX(fp, ap) \
81 (COFF_ROUND(COFF_HDR_SIZE + (fp)->f_nscns * \
82 sizeof(struct coff_scnhdr), \
83 COFF_SEGMENT_ALIGNMENT(fp, ap)))
84
85 #define COFF_DATOFF_XXX(fp, ap) \
86 (COFF_TXTOFF_XXX(fp, ap) + (ap)->a_tsize)
87
88 if ((u_long)exechdrp->a.a_tstart <= vmaddr &&
89 vmaddr < (u_long)(exechdrp->a.a_tstart + exechdrp->a.a_tsize))
90 *fileoffp = vmaddr - exechdrp->a.a_tstart +
91 COFF_TXTOFF(&exechdrp->f, &(exechdrp->a));
92 else if ((u_long)exechdrp->a.a_dstart <= vmaddr &&
93 vmaddr < (u_long)(exechdrp->a.a_dstart + exechdrp->a.a_dsize))
94 *fileoffp = vmaddr - exechdrp->a.a_dstart +
95 COFF_DATOFF_XXX(&exechdrp->f, &(exechdrp->a));
96 else
97 BAD;
98
99 out:
100 return (rv);
101 }
102
103 #endif /* NLIST_COFF */
104