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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
33 | * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE | |
34 | * -------------------- ----- ---------------------- | |
35 | * CURRENT PATCH LEVEL: 1 00032 | |
36 | * -------------------- ----- ---------------------- | |
37 | * | |
38 | * 05 Aug 92 David Greenman Fix kernel namelist db create/use | |
39 | */ | |
40 | ||
41 | #ifndef lint | |
42 | static char sccsid[] = "@(#)nlist.c 5.4 (Berkeley) 4/27/91"; | |
43 | #endif /* not lint */ | |
44 | ||
45 | #include <sys/param.h> | |
46 | #include <fcntl.h> | |
47 | #include <limits.h> | |
48 | #include <a.out.h> | |
49 | #include <db.h> | |
50 | #include <errno.h> | |
51 | #include <unistd.h> | |
52 | #include <kvm.h> | |
53 | #include <stdio.h> | |
54 | #include <string.h> | |
55 | #include <stdlib.h> | |
56 | ||
57 | typedef struct nlist NLIST; | |
58 | #define _strx n_un.n_strx | |
59 | #define _name n_un.n_name | |
60 | ||
61 | static char *kfile; | |
62 | ||
63 | create_knlist(name, db) | |
64 | char *name; | |
65 | DB *db; | |
66 | { | |
67 | register int nsyms; | |
68 | struct exec ebuf; | |
69 | FILE *fp; | |
70 | NLIST nbuf; | |
71 | DBT data, key; | |
72 | int fd, nr, strsize; | |
73 | char *strtab, buf[1024]; | |
74 | ||
75 | kfile = name; | |
76 | if ((fd = open(name, O_RDONLY, 0)) < 0) | |
77 | error(name); | |
78 | ||
79 | /* Read in exec structure. */ | |
80 | nr = read(fd, (char *)&ebuf, sizeof(struct exec)); | |
81 | if (nr != sizeof(struct exec)) | |
82 | badfmt(nr, "no exec header"); | |
83 | ||
84 | /* Check magic number and symbol count. */ | |
85 | if (N_BADMAG(ebuf)) | |
86 | badfmt("bad magic number"); | |
87 | if (!ebuf.a_syms) | |
88 | badfmt("stripped"); | |
89 | ||
90 | /* Seek to string table. */ | |
91 | if (lseek(fd, N_STROFF(ebuf), SEEK_SET) == -1) | |
92 | badfmt("corrupted string table"); | |
93 | ||
94 | /* Read in the size of the symbol table. */ | |
95 | nr = read(fd, (char *)&strsize, sizeof(strsize)); | |
96 | if (nr != sizeof(strsize)) | |
97 | badread(nr, "no symbol table"); | |
98 | ||
99 | /* Read in the string table. */ | |
100 | strsize -= sizeof(strsize); | |
101 | if (!(strtab = (char *)malloc(strsize))) | |
102 | error(name); | |
103 | if ((nr = read(fd, strtab, strsize)) != strsize) | |
104 | badread(nr, "corrupted symbol table"); | |
105 | ||
106 | /* Seek to symbol table. */ | |
107 | if (!(fp = fdopen(fd, "r"))) | |
108 | error(name); | |
109 | if (fseek(fp, N_SYMOFF(ebuf), SEEK_SET) == -1) | |
110 | error(name); | |
111 | ||
112 | data.data = (u_char *)&nbuf; | |
113 | data.size = sizeof(NLIST); | |
114 | ||
115 | /* Read each symbol and enter it into the database. */ | |
116 | nsyms = ebuf.a_syms / sizeof(struct nlist); | |
117 | while (nsyms--) { | |
118 | if (fread((char *)&nbuf, sizeof (NLIST), 1, fp) != 1) { | |
119 | if (feof(fp)) | |
120 | badfmt("corrupted symbol table"); | |
121 | error(name); | |
122 | } | |
123 | if (!nbuf._strx || nbuf.n_type&N_STAB) | |
124 | continue; | |
125 | ||
126 | key.data = (u_char *)strtab + nbuf._strx - sizeof(long); | |
127 | key.size = strlen((char *)key.data); | |
128 | if ((db->put)(db, &key, &data, 0)) | |
129 | error("put"); | |
130 | ||
131 | if (!strncmp((char *)key.data, VRS_SYM, sizeof(VRS_SYM) - 1)) { | |
132 | off_t cur_off, rel_off, vers_off; | |
133 | ||
134 | /* Offset relative to start of text image in VM. */ | |
135 | #ifdef hp300 | |
136 | rel_off = nbuf.n_value; | |
137 | #endif | |
138 | #ifdef tahoe | |
139 | /* | |
140 | * On tahoe, first 0x800 is reserved for communication | |
141 | * with the console processor. | |
142 | */ | |
143 | rel_off = ((nbuf.n_value & ~KERNBASE) - 0x800); | |
144 | #endif | |
145 | #ifdef vax | |
146 | rel_off = nbuf.n_value & ~KERNBASE; | |
147 | #endif | |
148 | #ifdef i386 | |
149 | rel_off = ((nbuf.n_value & ~KERNBASE) + CLBYTES); | |
150 | #endif | |
151 | /* | |
152 | * When loaded, data is rounded to next page cluster | |
153 | * after text, but not in file. | |
154 | */ | |
155 | rel_off -= CLBYTES - (ebuf.a_text % CLBYTES); | |
156 | vers_off = N_TXTOFF(ebuf) + rel_off; | |
157 | ||
158 | cur_off = ftell(fp); | |
159 | if (fseek(fp, vers_off, SEEK_SET) == -1) | |
160 | badfmt("corrupted string table"); | |
161 | ||
162 | /* | |
163 | * Read version string up to, and including newline. | |
164 | * This code assumes that a newline terminates the | |
165 | * version line. | |
166 | */ | |
167 | if (fgets(buf, sizeof(buf), fp) == NULL) | |
168 | badfmt("corrupted string table"); | |
169 | ||
170 | key.data = (u_char *)VRS_KEY; | |
171 | key.size = sizeof(VRS_KEY) - 1; | |
172 | data.data = (u_char *)buf; | |
173 | data.size = strlen(buf); | |
174 | if ((db->put)(db, &key, &data, 0)) | |
175 | error("put"); | |
176 | ||
177 | /* Restore to original values. */ | |
178 | data.data = (u_char *)&nbuf; | |
179 | data.size = sizeof(NLIST); | |
180 | if (fseek(fp, cur_off, SEEK_SET) == -1) | |
181 | badfmt("corrupted string table"); | |
182 | } | |
183 | } | |
184 | (void)fclose(fp); | |
185 | } | |
186 | ||
187 | badread(nr, p) | |
188 | int nr; | |
189 | char *p; | |
190 | { | |
191 | if (nr < 0) | |
192 | error(kfile); | |
193 | badfmt(p); | |
194 | } | |
195 | ||
196 | badfmt(p) | |
197 | char *p; | |
198 | { | |
199 | (void)fprintf(stderr, | |
200 | "symorder: %s: %s: %s\n", kfile, p, strerror(EFTYPE)); | |
201 | exit(1); | |
202 | } |