Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Postprocess module symbol versions |
| 2 | * |
| 3 | * Copyright 2003 Kai Germaschewski |
| 4 | * Copyright 2002-2004 Rusty Russell, IBM Corporation |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 5 | * Copyright 2006-2008 Sam Ravnborg |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Based in part on module-init-tools/depmod.c,file2alias |
| 7 | * |
| 8 | * This software may be used and distributed according to the terms |
| 9 | * of the GNU General Public License, incorporated herein by reference. |
| 10 | * |
| 11 | * Usage: modpost vmlinux module1.o module2.o ... |
| 12 | */ |
| 13 | |
Mathieu Desnoyers | b2e3e65 | 2008-02-13 15:03:39 -0800 | [diff] [blame] | 14 | #define _GNU_SOURCE |
Masahiro Yamada | 5370d4a | 2020-01-05 00:36:51 +0900 | [diff] [blame] | 15 | #include <elf.h> |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 16 | #include <fnmatch.h> |
Mathieu Desnoyers | b2e3e65 | 2008-02-13 15:03:39 -0800 | [diff] [blame] | 17 | #include <stdio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <ctype.h> |
Andrew Morton | 5003bab | 2010-08-11 00:42:26 -0700 | [diff] [blame] | 19 | #include <string.h> |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 20 | #include <limits.h> |
Masahiro Yamada | e54dd93 | 2021-08-28 18:50:59 +0900 | [diff] [blame] | 21 | #include <stdbool.h> |
Guenter Roeck | eed380f | 2013-09-23 15:23:54 +0930 | [diff] [blame] | 22 | #include <errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "modpost.h" |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 24 | #include "../../include/linux/license.h" |
Alan Jenkins | 9e1b9b8 | 2009-11-07 21:03:54 +0000 | [diff] [blame] | 25 | |
Masahiro Yamada | 481461f | 2023-07-16 19:15:54 +0900 | [diff] [blame] | 26 | static bool module_enabled; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | /* Are we using CONFIG_MODVERSIONS? */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 28 | static bool modversions; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /* Is CONFIG_MODULE_SRCVERSION_ALL set? */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 30 | static bool all_versions; |
Sam Ravnborg | 040fcc8 | 2006-01-28 22:15:55 +0100 | [diff] [blame] | 31 | /* If we are modposting external module set to 1 */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 32 | static bool external_module; |
Kirill Korotaev | c53ddac | 2006-09-07 13:08:54 -0700 | [diff] [blame] | 33 | /* Only warn about unresolved symbols */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 34 | static bool warn_unresolved; |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 35 | |
Masahiro Yamada | b5f1a52 | 2022-04-05 20:33:53 +0900 | [diff] [blame] | 36 | static int sec_mismatch_count; |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 37 | static bool sec_mismatch_warn_only = true; |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 38 | /* Trim EXPORT_SYMBOLs that are unused by in-tree modules */ |
| 39 | static bool trim_unused_exports; |
| 40 | |
Guenter Roeck | eed380f | 2013-09-23 15:23:54 +0930 | [diff] [blame] | 41 | /* ignore missing files */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 42 | static bool ignore_missing_files; |
Jessica Yu | 54b7784 | 2020-03-06 17:02:06 +0100 | [diff] [blame] | 43 | /* If set to 1, only warn (instead of error) about missing ns imports */ |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 44 | static bool allow_missing_ns_imports; |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 45 | |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 46 | static bool error_occurred; |
| 47 | |
Masahiro Yamada | 20ff368 | 2023-06-06 18:41:59 +0900 | [diff] [blame] | 48 | static bool extra_warn; |
| 49 | |
Masahiro Yamada | 4475dff | 2021-03-26 03:54:11 +0900 | [diff] [blame] | 50 | /* |
| 51 | * Cut off the warnings when there are too many. This typically occurs when |
| 52 | * vmlinux is missing. ('make modules' without building vmlinux.) |
| 53 | */ |
| 54 | #define MAX_UNRESOLVED_REPORTS 10 |
| 55 | static unsigned int nr_unresolved; |
| 56 | |
Wanlong Gao | 4fd3e4e | 2017-06-30 22:07:03 +0800 | [diff] [blame] | 57 | /* In kernel, this size is defined in linux/module.h; |
| 58 | * here we use Elf_Addr instead of long for covering cross-compile |
| 59 | */ |
| 60 | |
| 61 | #define MODULE_NAME_LEN (64 - sizeof(Elf_Addr)) |
| 62 | |
Jessica Yu | 93c95e5 | 2020-03-06 17:02:05 +0100 | [diff] [blame] | 63 | void __attribute__((format(printf, 2, 3))) |
| 64 | modpost_log(enum loglevel loglevel, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
| 66 | va_list arglist; |
| 67 | |
Jessica Yu | 93c95e5 | 2020-03-06 17:02:05 +0100 | [diff] [blame] | 68 | switch (loglevel) { |
| 69 | case LOG_WARN: |
| 70 | fprintf(stderr, "WARNING: "); |
| 71 | break; |
| 72 | case LOG_ERROR: |
| 73 | fprintf(stderr, "ERROR: "); |
| 74 | break; |
| 75 | case LOG_FATAL: |
| 76 | fprintf(stderr, "FATAL: "); |
| 77 | break; |
| 78 | default: /* invalid loglevel, ignore */ |
| 79 | break; |
| 80 | } |
| 81 | |
| 82 | fprintf(stderr, "modpost: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | va_start(arglist, fmt); |
| 85 | vfprintf(stderr, fmt, arglist); |
| 86 | va_end(arglist); |
| 87 | |
Jessica Yu | 93c95e5 | 2020-03-06 17:02:05 +0100 | [diff] [blame] | 88 | if (loglevel == LOG_FATAL) |
| 89 | exit(1); |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 90 | if (loglevel == LOG_ERROR) |
| 91 | error_occurred = true; |
Matthew Wilcox | 2a11665 | 2006-10-07 05:35:32 -0600 | [diff] [blame] | 92 | } |
| 93 | |
Masahiro Yamada | e54dd93 | 2021-08-28 18:50:59 +0900 | [diff] [blame] | 94 | static inline bool strends(const char *str, const char *postfix) |
| 95 | { |
| 96 | if (strlen(str) < strlen(postfix)) |
| 97 | return false; |
| 98 | |
| 99 | return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0; |
| 100 | } |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | void *do_nofail(void *ptr, const char *expr) |
| 103 | { |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 104 | if (!ptr) |
Jessica Yu | 93c95e5 | 2020-03-06 17:02:05 +0100 | [diff] [blame] | 105 | fatal("Memory allocation failure: %s.\n", expr); |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | return ptr; |
| 108 | } |
| 109 | |
Masahiro Yamada | ac5100f | 2020-06-01 14:57:17 +0900 | [diff] [blame] | 110 | char *read_text_file(const char *filename) |
| 111 | { |
| 112 | struct stat st; |
| 113 | size_t nbytes; |
| 114 | int fd; |
| 115 | char *buf; |
| 116 | |
| 117 | fd = open(filename, O_RDONLY); |
| 118 | if (fd < 0) { |
| 119 | perror(filename); |
| 120 | exit(1); |
| 121 | } |
| 122 | |
| 123 | if (fstat(fd, &st) < 0) { |
| 124 | perror(filename); |
| 125 | exit(1); |
| 126 | } |
| 127 | |
| 128 | buf = NOFAIL(malloc(st.st_size + 1)); |
| 129 | |
| 130 | nbytes = st.st_size; |
| 131 | |
| 132 | while (nbytes) { |
| 133 | ssize_t bytes_read; |
| 134 | |
| 135 | bytes_read = read(fd, buf, nbytes); |
| 136 | if (bytes_read < 0) { |
| 137 | perror(filename); |
| 138 | exit(1); |
| 139 | } |
| 140 | |
| 141 | nbytes -= bytes_read; |
| 142 | } |
| 143 | buf[st.st_size] = '\0'; |
| 144 | |
| 145 | close(fd); |
| 146 | |
| 147 | return buf; |
| 148 | } |
| 149 | |
| 150 | char *get_line(char **stringp) |
| 151 | { |
H. Nikolaus Schaller | 736bb11 | 2020-07-01 08:18:27 +0200 | [diff] [blame] | 152 | char *orig = *stringp, *next; |
| 153 | |
Masahiro Yamada | ac5100f | 2020-06-01 14:57:17 +0900 | [diff] [blame] | 154 | /* do not return the unwanted extra line at EOF */ |
H. Nikolaus Schaller | 736bb11 | 2020-07-01 08:18:27 +0200 | [diff] [blame] | 155 | if (!orig || *orig == '\0') |
Masahiro Yamada | ac5100f | 2020-06-01 14:57:17 +0900 | [diff] [blame] | 156 | return NULL; |
| 157 | |
Wolfram Sang | 6020db5 | 2020-07-26 23:44:19 +0200 | [diff] [blame] | 158 | /* don't use strsep here, it is not available everywhere */ |
H. Nikolaus Schaller | 736bb11 | 2020-07-01 08:18:27 +0200 | [diff] [blame] | 159 | next = strchr(orig, '\n'); |
| 160 | if (next) |
| 161 | *next++ = '\0'; |
| 162 | |
| 163 | *stringp = next; |
| 164 | |
| 165 | return orig; |
Masahiro Yamada | ac5100f | 2020-06-01 14:57:17 +0900 | [diff] [blame] | 166 | } |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | /* A list of all modules we processed */ |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 169 | LIST_HEAD(modules); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Masahiro Yamada | 8b18574 | 2018-05-09 18:50:40 +0900 | [diff] [blame] | 171 | static struct module *find_module(const char *modname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
| 173 | struct module *mod; |
| 174 | |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 175 | list_for_each_entry(mod, &modules, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | if (strcmp(mod->name, modname) == 0) |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 177 | return mod; |
| 178 | } |
| 179 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 182 | static struct module *new_module(const char *name, size_t namelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
| 184 | struct module *mod; |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 185 | |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 186 | mod = NOFAIL(malloc(sizeof(*mod) + namelen + 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | memset(mod, 0, sizeof(*mod)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Masahiro Yamada | f841536 | 2022-05-01 17:40:15 +0900 | [diff] [blame] | 189 | INIT_LIST_HEAD(&mod->exported_symbols); |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 190 | INIT_LIST_HEAD(&mod->unresolved_symbols); |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 191 | INIT_LIST_HEAD(&mod->missing_namespaces); |
| 192 | INIT_LIST_HEAD(&mod->imported_namespaces); |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 193 | |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 194 | memcpy(mod->name, name, namelen); |
| 195 | mod->name[namelen] = '\0'; |
| 196 | mod->is_vmlinux = (strcmp(mod->name, "vmlinux") == 0); |
Masahiro Yamada | 5066743 | 2022-05-01 17:40:08 +0900 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * Set mod->is_gpl_compatible to true by default. If MODULE_LICENSE() |
| 200 | * is missing, do not check the use for EXPORT_SYMBOL_GPL() becasue |
| 201 | * modpost will exit wiht error anyway. |
| 202 | */ |
| 203 | mod->is_gpl_compatible = true; |
| 204 | |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 205 | list_add_tail(&mod->list, &modules); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | return mod; |
| 208 | } |
| 209 | |
| 210 | /* A hash of all exported symbols, |
| 211 | * struct symbol is also used for lists of unresolved symbols */ |
| 212 | |
| 213 | #define SYMBOL_HASH_SIZE 1024 |
| 214 | |
| 215 | struct symbol { |
| 216 | struct symbol *next; |
Masahiro Yamada | f841536 | 2022-05-01 17:40:15 +0900 | [diff] [blame] | 217 | struct list_head list; /* link to module::exported_symbols or module::unresolved_symbols */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | struct module *module; |
Masahiro Yamada | 389eb3f | 2019-10-03 16:58:22 +0900 | [diff] [blame] | 219 | char *namespace; |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 220 | unsigned int crc; |
| 221 | bool crc_valid; |
| 222 | bool weak; |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 223 | bool is_func; |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 224 | bool is_gpl_only; /* exported by EXPORT_SYMBOL_GPL */ |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 225 | bool used; /* there exists a user of this symbol */ |
Gustavo A. R. Silva | 859c817 | 2020-05-07 13:56:01 -0500 | [diff] [blame] | 226 | char name[]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | }; |
| 228 | |
| 229 | static struct symbol *symbolhash[SYMBOL_HASH_SIZE]; |
| 230 | |
Bhaskar Chowdhury | f394583 | 2021-03-26 11:22:19 +0530 | [diff] [blame] | 231 | /* This is based on the hash algorithm from gdbm, via tdb */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | static inline unsigned int tdb_hash(const char *name) |
| 233 | { |
| 234 | unsigned value; /* Used to compute the hash value. */ |
| 235 | unsigned i; /* Used to cycle through random values. */ |
| 236 | |
| 237 | /* Set the initial value from the key size. */ |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 238 | for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | value = (value + (((unsigned char *)name)[i] << (i*5 % 24))); |
| 240 | |
| 241 | return (1103515243 * value + 12345); |
| 242 | } |
| 243 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 244 | /** |
| 245 | * Allocate a new symbols for use in the hash of exported symbols or |
| 246 | * the list of unresolved symbols per module |
| 247 | **/ |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 248 | static struct symbol *alloc_symbol(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | { |
| 250 | struct symbol *s = NOFAIL(malloc(sizeof(*s) + strlen(name) + 1)); |
| 251 | |
| 252 | memset(s, 0, sizeof(*s)); |
| 253 | strcpy(s->name, name); |
Masahiro Yamada | 31cb50b | 2022-05-27 19:01:51 +0900 | [diff] [blame] | 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | return s; |
| 256 | } |
| 257 | |
| 258 | /* For the hash of exported symbols */ |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 259 | static void hash_add_symbol(struct symbol *sym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
| 261 | unsigned int hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 263 | hash = tdb_hash(sym->name) % SYMBOL_HASH_SIZE; |
| 264 | sym->next = symbolhash[hash]; |
| 265 | symbolhash[hash] = sym; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
Masahiro Yamada | e882e89 | 2022-05-01 17:40:11 +0900 | [diff] [blame] | 268 | static void sym_add_unresolved(const char *name, struct module *mod, bool weak) |
| 269 | { |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 270 | struct symbol *sym; |
| 271 | |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 272 | sym = alloc_symbol(name); |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 273 | sym->weak = weak; |
| 274 | |
| 275 | list_add_tail(&sym->list, &mod->unresolved_symbols); |
Masahiro Yamada | e882e89 | 2022-05-01 17:40:11 +0900 | [diff] [blame] | 276 | } |
| 277 | |
Masahiro Yamada | 69c4cc99 | 2022-05-12 01:45:04 +0900 | [diff] [blame] | 278 | static struct symbol *sym_find_with_module(const char *name, struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
| 280 | struct symbol *s; |
| 281 | |
| 282 | /* For our purposes, .foo matches foo. PPC64 needs this. */ |
| 283 | if (name[0] == '.') |
| 284 | name++; |
| 285 | |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 286 | for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) { |
Masahiro Yamada | 69c4cc99 | 2022-05-12 01:45:04 +0900 | [diff] [blame] | 287 | if (strcmp(s->name, name) == 0 && (!mod || s->module == mod)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return s; |
| 289 | } |
| 290 | return NULL; |
| 291 | } |
| 292 | |
Masahiro Yamada | 69c4cc99 | 2022-05-12 01:45:04 +0900 | [diff] [blame] | 293 | static struct symbol *find_symbol(const char *name) |
| 294 | { |
| 295 | return sym_find_with_module(name, NULL); |
| 296 | } |
| 297 | |
Masahiro Yamada | 70ddb48 | 2022-04-25 04:07:56 +0900 | [diff] [blame] | 298 | struct namespace_list { |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 299 | struct list_head list; |
Masahiro Yamada | 70ddb48 | 2022-04-25 04:07:56 +0900 | [diff] [blame] | 300 | char namespace[]; |
| 301 | }; |
| 302 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 303 | static bool contains_namespace(struct list_head *head, const char *namespace) |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 304 | { |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 305 | struct namespace_list *list; |
| 306 | |
Masahiro Yamada | 700c48b | 2023-06-12 00:50:56 +0900 | [diff] [blame] | 307 | /* |
| 308 | * The default namespace is null string "", which is always implicitly |
| 309 | * contained. |
| 310 | */ |
| 311 | if (!namespace[0]) |
| 312 | return true; |
| 313 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 314 | list_for_each_entry(list, head, list) { |
Masahiro Yamada | 76b54cf | 2019-10-29 21:38:09 +0900 | [diff] [blame] | 315 | if (!strcmp(list->namespace, namespace)) |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 316 | return true; |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 317 | } |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 318 | |
| 319 | return false; |
| 320 | } |
| 321 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 322 | static void add_namespace(struct list_head *head, const char *namespace) |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 323 | { |
| 324 | struct namespace_list *ns_entry; |
| 325 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 326 | if (!contains_namespace(head, namespace)) { |
| 327 | ns_entry = NOFAIL(malloc(sizeof(*ns_entry) + |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 328 | strlen(namespace) + 1)); |
| 329 | strcpy(ns_entry->namespace, namespace); |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 330 | list_add_tail(&ns_entry->list, head); |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 331 | } |
| 332 | } |
| 333 | |
Masahiro Yamada | d2e4d05 | 2020-05-25 14:47:04 +0900 | [diff] [blame] | 334 | static void *sym_get_data_by_offset(const struct elf_info *info, |
| 335 | unsigned int secindex, unsigned long offset) |
Masahiro Yamada | 6124c04 | 2017-09-06 16:19:05 -0700 | [diff] [blame] | 336 | { |
Xiao Yang | 4b8a5cf | 2020-03-18 18:34:16 +0800 | [diff] [blame] | 337 | Elf_Shdr *sechdr = &info->sechdrs[secindex]; |
Masahiro Yamada | afa0459 | 2019-11-15 02:42:21 +0900 | [diff] [blame] | 338 | |
Masahiro Yamada | afa0459 | 2019-11-15 02:42:21 +0900 | [diff] [blame] | 339 | return (void *)info->hdr + sechdr->sh_offset + offset; |
| 340 | } |
| 341 | |
Masahiro Yamada | abe864b | 2022-07-20 01:53:00 +0900 | [diff] [blame] | 342 | void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym) |
Masahiro Yamada | d2e4d05 | 2020-05-25 14:47:04 +0900 | [diff] [blame] | 343 | { |
| 344 | return sym_get_data_by_offset(info, get_secindex(info, sym), |
| 345 | sym->st_value); |
| 346 | } |
| 347 | |
Masahiro Yamada | 565587d | 2020-05-25 14:47:05 +0900 | [diff] [blame] | 348 | static const char *sech_name(const struct elf_info *info, Elf_Shdr *sechdr) |
| 349 | { |
| 350 | return sym_get_data_by_offset(info, info->secindex_strings, |
| 351 | sechdr->sh_name); |
| 352 | } |
| 353 | |
Masahiro Yamada | 125ed24 | 2022-07-31 02:36:34 +0900 | [diff] [blame] | 354 | static const char *sec_name(const struct elf_info *info, unsigned int secindex) |
Masahiro Yamada | 565587d | 2020-05-25 14:47:05 +0900 | [diff] [blame] | 355 | { |
Masahiro Yamada | 125ed24 | 2022-07-31 02:36:34 +0900 | [diff] [blame] | 356 | /* |
| 357 | * If sym->st_shndx is a special section index, there is no |
| 358 | * corresponding section header. |
| 359 | * Return "" if the index is out of range of info->sechdrs[] array. |
| 360 | */ |
| 361 | if (secindex >= info->num_sections) |
| 362 | return ""; |
| 363 | |
Masahiro Yamada | 565587d | 2020-05-25 14:47:05 +0900 | [diff] [blame] | 364 | return sech_name(info, &info->sechdrs[secindex]); |
| 365 | } |
| 366 | |
Alessio Igor Bogani | 62a2635 | 2011-07-14 08:51:16 +0200 | [diff] [blame] | 367 | #define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0) |
| 368 | |
Matthias Maennich | 9ae5bd1 | 2019-10-18 10:31:41 +0100 | [diff] [blame] | 369 | static struct symbol *sym_add_exported(const char *name, struct module *mod, |
Masahiro Yamada | 6e7611c | 2023-06-12 00:50:55 +0900 | [diff] [blame] | 370 | bool gpl_only, const char *namespace) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
| 372 | struct symbol *s = find_symbol(name); |
| 373 | |
Masahiro Yamada | e76cc48 | 2022-05-01 17:40:18 +0900 | [diff] [blame] | 374 | if (s && (!external_module || s->module->is_vmlinux || s->module == mod)) { |
Masahiro Yamada | b8422711 | 2022-05-01 17:40:17 +0900 | [diff] [blame] | 375 | error("%s: '%s' exported twice. Previous export was in %s%s\n", |
| 376 | mod->name, name, s->module->name, |
| 377 | s->module->is_vmlinux ? "" : ".ko"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
Masahiro Yamada | 7ef9ab3 | 2019-11-15 02:42:26 +0900 | [diff] [blame] | 379 | |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 380 | s = alloc_symbol(name); |
Masahiro Yamada | 7ef9ab3 | 2019-11-15 02:42:26 +0900 | [diff] [blame] | 381 | s->module = mod; |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 382 | s->is_gpl_only = gpl_only; |
Masahiro Yamada | 700c48b | 2023-06-12 00:50:56 +0900 | [diff] [blame] | 383 | s->namespace = NOFAIL(strdup(namespace)); |
Masahiro Yamada | e76cc48 | 2022-05-01 17:40:18 +0900 | [diff] [blame] | 384 | list_add_tail(&s->list, &mod->exported_symbols); |
Masahiro Yamada | f18379a | 2022-05-01 17:40:19 +0900 | [diff] [blame] | 385 | hash_add_symbol(s); |
Masahiro Yamada | e76cc48 | 2022-05-01 17:40:18 +0900 | [diff] [blame] | 386 | |
Sam Ravnborg | 040fcc8 | 2006-01-28 22:15:55 +0100 | [diff] [blame] | 387 | return s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 390 | static void sym_set_crc(struct symbol *sym, unsigned int crc) |
Sam Ravnborg | 040fcc8 | 2006-01-28 22:15:55 +0100 | [diff] [blame] | 391 | { |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 392 | sym->crc = crc; |
| 393 | sym->crc_valid = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Masahiro Yamada | 3b09efc | 2020-06-01 14:57:31 +0900 | [diff] [blame] | 396 | static void *grab_file(const char *filename, size_t *size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | { |
| 398 | struct stat st; |
Jesper Juhl | eb3d5cc | 2012-05-23 22:28:49 +0930 | [diff] [blame] | 399 | void *map = MAP_FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | int fd; |
| 401 | |
| 402 | fd = open(filename, O_RDONLY); |
Jesper Juhl | eb3d5cc | 2012-05-23 22:28:49 +0930 | [diff] [blame] | 403 | if (fd < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return NULL; |
Jesper Juhl | eb3d5cc | 2012-05-23 22:28:49 +0930 | [diff] [blame] | 405 | if (fstat(fd, &st)) |
| 406 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | *size = st.st_size; |
| 409 | map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Jesper Juhl | eb3d5cc | 2012-05-23 22:28:49 +0930 | [diff] [blame] | 411 | failed: |
| 412 | close(fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | if (map == MAP_FAILED) |
| 414 | return NULL; |
| 415 | return map; |
| 416 | } |
| 417 | |
Masahiro Yamada | 3b09efc | 2020-06-01 14:57:31 +0900 | [diff] [blame] | 418 | static void release_file(void *file, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | { |
| 420 | munmap(file, size); |
| 421 | } |
| 422 | |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 423 | static int parse_elf(struct elf_info *info, const char *filename) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
| 425 | unsigned int i; |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 426 | Elf_Ehdr *hdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | Elf_Shdr *sechdrs; |
| 428 | Elf_Sym *sym; |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 429 | const char *secstrings; |
| 430 | unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
| 432 | hdr = grab_file(filename, &info->size); |
| 433 | if (!hdr) { |
Guenter Roeck | eed380f | 2013-09-23 15:23:54 +0930 | [diff] [blame] | 434 | if (ignore_missing_files) { |
| 435 | fprintf(stderr, "%s: %s (ignored)\n", filename, |
| 436 | strerror(errno)); |
| 437 | return 0; |
| 438 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | perror(filename); |
Sam Ravnborg | 6803dc0 | 2006-06-24 23:46:54 +0200 | [diff] [blame] | 440 | exit(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
| 442 | info->hdr = hdr; |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 443 | if (info->size < sizeof(*hdr)) { |
| 444 | /* file too small, assume this is an empty .o file */ |
| 445 | return 0; |
| 446 | } |
| 447 | /* Is this a valid ELF file? */ |
| 448 | if ((hdr->e_ident[EI_MAG0] != ELFMAG0) || |
| 449 | (hdr->e_ident[EI_MAG1] != ELFMAG1) || |
| 450 | (hdr->e_ident[EI_MAG2] != ELFMAG2) || |
| 451 | (hdr->e_ident[EI_MAG3] != ELFMAG3)) { |
| 452 | /* Not an ELF file - silently ignore it */ |
| 453 | return 0; |
| 454 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | /* Fix endianness in ELF header */ |
Anders Kaseorg | 7d875a0 | 2009-05-03 22:02:55 +0200 | [diff] [blame] | 456 | hdr->e_type = TO_NATIVE(hdr->e_type); |
| 457 | hdr->e_machine = TO_NATIVE(hdr->e_machine); |
| 458 | hdr->e_version = TO_NATIVE(hdr->e_version); |
| 459 | hdr->e_entry = TO_NATIVE(hdr->e_entry); |
| 460 | hdr->e_phoff = TO_NATIVE(hdr->e_phoff); |
| 461 | hdr->e_shoff = TO_NATIVE(hdr->e_shoff); |
| 462 | hdr->e_flags = TO_NATIVE(hdr->e_flags); |
| 463 | hdr->e_ehsize = TO_NATIVE(hdr->e_ehsize); |
| 464 | hdr->e_phentsize = TO_NATIVE(hdr->e_phentsize); |
| 465 | hdr->e_phnum = TO_NATIVE(hdr->e_phnum); |
| 466 | hdr->e_shentsize = TO_NATIVE(hdr->e_shentsize); |
| 467 | hdr->e_shnum = TO_NATIVE(hdr->e_shnum); |
| 468 | hdr->e_shstrndx = TO_NATIVE(hdr->e_shstrndx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | sechdrs = (void *)hdr + hdr->e_shoff; |
| 470 | info->sechdrs = sechdrs; |
| 471 | |
Masahiro Yamada | 5764f66 | 2022-07-20 01:52:59 +0900 | [diff] [blame] | 472 | /* modpost only works for relocatable objects */ |
| 473 | if (hdr->e_type != ET_REL) |
| 474 | fatal("%s: not relocatable object.", filename); |
| 475 | |
Petr Stetiar | a83710e | 2007-08-27 12:15:07 +0200 | [diff] [blame] | 476 | /* Check if file offset is correct */ |
| 477 | if (hdr->e_shoff > info->size) { |
Masahiro Yamada | 3b09efc | 2020-06-01 14:57:31 +0900 | [diff] [blame] | 478 | fatal("section header offset=%lu in file '%s' is bigger than filesize=%zu\n", |
| 479 | (unsigned long)hdr->e_shoff, filename, info->size); |
Petr Stetiar | a83710e | 2007-08-27 12:15:07 +0200 | [diff] [blame] | 480 | return 0; |
| 481 | } |
| 482 | |
Anders Kaseorg | 6845756b | 2011-05-19 16:55:27 -0600 | [diff] [blame] | 483 | if (hdr->e_shnum == SHN_UNDEF) { |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 484 | /* |
| 485 | * There are more than 64k sections, |
| 486 | * read count from .sh_size. |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 487 | */ |
| 488 | info->num_sections = TO_NATIVE(sechdrs[0].sh_size); |
| 489 | } |
| 490 | else { |
| 491 | info->num_sections = hdr->e_shnum; |
| 492 | } |
| 493 | if (hdr->e_shstrndx == SHN_XINDEX) { |
Anders Kaseorg | 6845756b | 2011-05-19 16:55:27 -0600 | [diff] [blame] | 494 | info->secindex_strings = TO_NATIVE(sechdrs[0].sh_link); |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 495 | } |
| 496 | else { |
| 497 | info->secindex_strings = hdr->e_shstrndx; |
| 498 | } |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | /* Fix endianness in section headers */ |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 501 | for (i = 0; i < info->num_sections; i++) { |
Anders Kaseorg | 7d875a0 | 2009-05-03 22:02:55 +0200 | [diff] [blame] | 502 | sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); |
| 503 | sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); |
| 504 | sechdrs[i].sh_flags = TO_NATIVE(sechdrs[i].sh_flags); |
| 505 | sechdrs[i].sh_addr = TO_NATIVE(sechdrs[i].sh_addr); |
| 506 | sechdrs[i].sh_offset = TO_NATIVE(sechdrs[i].sh_offset); |
| 507 | sechdrs[i].sh_size = TO_NATIVE(sechdrs[i].sh_size); |
| 508 | sechdrs[i].sh_link = TO_NATIVE(sechdrs[i].sh_link); |
| 509 | sechdrs[i].sh_info = TO_NATIVE(sechdrs[i].sh_info); |
| 510 | sechdrs[i].sh_addralign = TO_NATIVE(sechdrs[i].sh_addralign); |
| 511 | sechdrs[i].sh_entsize = TO_NATIVE(sechdrs[i].sh_entsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | /* Find symbol table. */ |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 514 | secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset; |
| 515 | for (i = 1; i < info->num_sections; i++) { |
Ram Pai | bd5cbce | 2006-06-08 22:12:53 -0700 | [diff] [blame] | 516 | const char *secname; |
Tejun Heo | 56fc82c | 2009-02-06 00:48:02 +0900 | [diff] [blame] | 517 | int nobits = sechdrs[i].sh_type == SHT_NOBITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
Tejun Heo | 56fc82c | 2009-02-06 00:48:02 +0900 | [diff] [blame] | 519 | if (!nobits && sechdrs[i].sh_offset > info->size) { |
Geert Uytterhoeven | 0d2573a | 2022-11-09 14:30:55 +0100 | [diff] [blame] | 520 | fatal("%s is truncated. sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%zu\n", |
| 521 | filename, (unsigned long)sechdrs[i].sh_offset, |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 522 | sizeof(*hdr)); |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 523 | return 0; |
| 524 | } |
Ram Pai | bd5cbce | 2006-06-08 22:12:53 -0700 | [diff] [blame] | 525 | secname = secstrings + sechdrs[i].sh_name; |
| 526 | if (strcmp(secname, ".modinfo") == 0) { |
Tejun Heo | 56fc82c | 2009-02-06 00:48:02 +0900 | [diff] [blame] | 527 | if (nobits) |
| 528 | fatal("%s has NOBITS .modinfo\n", filename); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | info->modinfo = (void *)hdr + sechdrs[i].sh_offset; |
| 530 | info->modinfo_len = sechdrs[i].sh_size; |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 531 | } else if (!strcmp(secname, ".export_symbol")) { |
| 532 | info->export_symbol_secndx = i; |
Masahiro Yamada | 7ce3e41 | 2022-04-05 20:33:51 +0900 | [diff] [blame] | 533 | } |
Ram Pai | bd5cbce | 2006-06-08 22:12:53 -0700 | [diff] [blame] | 534 | |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 535 | if (sechdrs[i].sh_type == SHT_SYMTAB) { |
| 536 | unsigned int sh_link_idx; |
| 537 | symtab_idx = i; |
| 538 | info->symtab_start = (void *)hdr + |
| 539 | sechdrs[i].sh_offset; |
| 540 | info->symtab_stop = (void *)hdr + |
| 541 | sechdrs[i].sh_offset + sechdrs[i].sh_size; |
Anders Kaseorg | 6845756b | 2011-05-19 16:55:27 -0600 | [diff] [blame] | 542 | sh_link_idx = sechdrs[i].sh_link; |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 543 | info->strtab = (void *)hdr + |
| 544 | sechdrs[sh_link_idx].sh_offset; |
| 545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 547 | /* 32bit section no. table? ("more than 64k sections") */ |
| 548 | if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) { |
| 549 | symtab_shndx_idx = i; |
| 550 | info->symtab_shndx_start = (void *)hdr + |
| 551 | sechdrs[i].sh_offset; |
| 552 | info->symtab_shndx_stop = (void *)hdr + |
| 553 | sechdrs[i].sh_offset + sechdrs[i].sh_size; |
| 554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 556 | if (!info->symtab_start) |
Sam Ravnborg | cb80514 | 2006-01-28 16:57:26 +0100 | [diff] [blame] | 557 | fatal("%s has no symtab?\n", filename); |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | /* Fix endianness in symbols */ |
| 560 | for (sym = info->symtab_start; sym < info->symtab_stop; sym++) { |
| 561 | sym->st_shndx = TO_NATIVE(sym->st_shndx); |
| 562 | sym->st_name = TO_NATIVE(sym->st_name); |
| 563 | sym->st_value = TO_NATIVE(sym->st_value); |
| 564 | sym->st_size = TO_NATIVE(sym->st_size); |
| 565 | } |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 566 | |
| 567 | if (symtab_shndx_idx != ~0U) { |
| 568 | Elf32_Word *p; |
Anders Kaseorg | 6845756b | 2011-05-19 16:55:27 -0600 | [diff] [blame] | 569 | if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link) |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 570 | fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n", |
Anders Kaseorg | 6845756b | 2011-05-19 16:55:27 -0600 | [diff] [blame] | 571 | filename, sechdrs[symtab_shndx_idx].sh_link, |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 572 | symtab_idx); |
| 573 | /* Fix endianness */ |
| 574 | for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop; |
| 575 | p++) |
| 576 | *p = TO_NATIVE(*p); |
| 577 | } |
| 578 | |
Jack Brennen | 4074532 | 2023-09-26 08:40:44 -0400 | [diff] [blame] | 579 | symsearch_init(info); |
| 580 | |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 581 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 584 | static void parse_elf_finish(struct elf_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | { |
Jack Brennen | 4074532 | 2023-09-26 08:40:44 -0400 | [diff] [blame] | 586 | symsearch_finish(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | release_file(info->hdr, info->size); |
| 588 | } |
| 589 | |
Sam Ravnborg | 4d7365d | 2008-06-12 15:02:55 +0200 | [diff] [blame] | 590 | static int ignore_undef_symbol(struct elf_info *info, const char *symname) |
| 591 | { |
| 592 | /* ignore __this_module, it will be resolved shortly */ |
Masahiro Yamada | b2c5cdc | 2018-05-09 16:23:45 +0900 | [diff] [blame] | 593 | if (strcmp(symname, "__this_module") == 0) |
Sam Ravnborg | 4d7365d | 2008-06-12 15:02:55 +0200 | [diff] [blame] | 594 | return 1; |
| 595 | /* ignore global offset table */ |
| 596 | if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 597 | return 1; |
| 598 | if (info->hdr->e_machine == EM_PPC) |
| 599 | /* Special register function linked on all modules during final link of .ko */ |
Masahiro Yamada | d62c476 | 2018-05-09 18:50:38 +0900 | [diff] [blame] | 600 | if (strstarts(symname, "_restgpr_") || |
| 601 | strstarts(symname, "_savegpr_") || |
| 602 | strstarts(symname, "_rest32gpr_") || |
| 603 | strstarts(symname, "_save32gpr_") || |
| 604 | strstarts(symname, "_restvr_") || |
| 605 | strstarts(symname, "_savevr_")) |
Sam Ravnborg | 4d7365d | 2008-06-12 15:02:55 +0200 | [diff] [blame] | 606 | return 1; |
Stephen Rothwell | 7fca5dc | 2010-06-29 20:08:42 +0000 | [diff] [blame] | 607 | if (info->hdr->e_machine == EM_PPC64) |
| 608 | /* Special register function linked on all modules during final link of .ko */ |
Masahiro Yamada | d62c476 | 2018-05-09 18:50:38 +0900 | [diff] [blame] | 609 | if (strstarts(symname, "_restgpr0_") || |
| 610 | strstarts(symname, "_savegpr0_") || |
| 611 | strstarts(symname, "_restvr_") || |
| 612 | strstarts(symname, "_savevr_") || |
Alan Modra | c153693 | 2016-01-15 20:52:22 +1100 | [diff] [blame] | 613 | strcmp(symname, ".TOC.") == 0) |
Stephen Rothwell | 7fca5dc | 2010-06-29 20:08:42 +0000 | [diff] [blame] | 614 | return 1; |
Vasily Gorbik | 1d2ad08 | 2022-03-06 20:56:07 +0100 | [diff] [blame] | 615 | |
| 616 | if (info->hdr->e_machine == EM_S390) |
| 617 | /* Expoline thunks are linked on all kernel modules during final link of .ko */ |
| 618 | if (strstarts(symname, "__s390_indirect_jump_r")) |
| 619 | return 1; |
Sam Ravnborg | 4d7365d | 2008-06-12 15:02:55 +0200 | [diff] [blame] | 620 | /* Do not ignore this symbol */ |
| 621 | return 0; |
| 622 | } |
| 623 | |
Masahiro Yamada | 9bd2a09 | 2019-11-15 02:42:23 +0900 | [diff] [blame] | 624 | static void handle_symbol(struct module *mod, struct elf_info *info, |
| 625 | const Elf_Sym *sym, const char *symname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | switch (sym->st_shndx) { |
| 628 | case SHN_COMMON: |
Masahiro Yamada | d62c476 | 2018-05-09 18:50:38 +0900 | [diff] [blame] | 629 | if (strstarts(symname, "__gnu_lto_")) { |
Andi Kleen | ef178f9 | 2014-02-08 09:01:17 +0100 | [diff] [blame] | 630 | /* Should warn here, but modpost runs before the linker */ |
| 631 | } else |
| 632 | warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | case SHN_UNDEF: |
| 635 | /* undefined symbol */ |
| 636 | if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL && |
| 637 | ELF_ST_BIND(sym->st_info) != STB_WEAK) |
| 638 | break; |
Sam Ravnborg | 4d7365d | 2008-06-12 15:02:55 +0200 | [diff] [blame] | 639 | if (ignore_undef_symbol(info, symname)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | if (info->hdr->e_machine == EM_SPARC || |
| 642 | info->hdr->e_machine == EM_SPARCV9) { |
| 643 | /* Ignore register directives. */ |
Ben Colline | 8d52901 | 2005-08-19 13:44:57 -0700 | [diff] [blame] | 644 | if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | break; |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 646 | if (symname[0] == '.') { |
Randy Dunlap | 1f3aa90 | 2018-08-15 12:30:38 -0700 | [diff] [blame] | 647 | char *munged = NOFAIL(strdup(symname)); |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 648 | munged[0] = '_'; |
| 649 | munged[1] = toupper(munged[1]); |
| 650 | symname = munged; |
| 651 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 653 | |
Masahiro Yamada | e882e89 | 2022-05-01 17:40:11 +0900 | [diff] [blame] | 654 | sym_add_unresolved(symname, mod, |
| 655 | ELF_ST_BIND(sym->st_info) == STB_WEAK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | break; |
| 657 | default: |
Masahiro Yamada | b2c5cdc | 2018-05-09 16:23:45 +0900 | [diff] [blame] | 658 | if (strcmp(symname, "init_module") == 0) |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 659 | mod->has_init = true; |
Masahiro Yamada | b2c5cdc | 2018-05-09 16:23:45 +0900 | [diff] [blame] | 660 | if (strcmp(symname, "cleanup_module") == 0) |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 661 | mod->has_cleanup = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | break; |
| 663 | } |
| 664 | } |
| 665 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 666 | /** |
| 667 | * Parse tag=value strings from .modinfo section |
| 668 | **/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | static char *next_string(char *string, unsigned long *secsize) |
| 670 | { |
| 671 | /* Skip non-zero chars */ |
| 672 | while (string[0]) { |
| 673 | string++; |
| 674 | if ((*secsize)-- <= 1) |
| 675 | return NULL; |
| 676 | } |
| 677 | |
| 678 | /* Skip any zero padding. */ |
| 679 | while (!string[0]) { |
| 680 | string++; |
| 681 | if ((*secsize)-- <= 1) |
| 682 | return NULL; |
| 683 | } |
| 684 | return string; |
| 685 | } |
| 686 | |
Masahiro Yamada | bca2cce | 2018-05-09 18:50:37 +0900 | [diff] [blame] | 687 | static char *get_next_modinfo(struct elf_info *info, const char *tag, |
| 688 | char *prev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | { |
| 690 | char *p; |
| 691 | unsigned int taglen = strlen(tag); |
Masahiro Yamada | bca2cce | 2018-05-09 18:50:37 +0900 | [diff] [blame] | 692 | char *modinfo = info->modinfo; |
| 693 | unsigned long size = info->modinfo_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
Masahiro Yamada | bca2cce | 2018-05-09 18:50:37 +0900 | [diff] [blame] | 695 | if (prev) { |
| 696 | size -= prev - modinfo; |
| 697 | modinfo = next_string(prev, &size); |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 698 | } |
| 699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | for (p = modinfo; p; p = next_string(p, &size)) { |
| 701 | if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') |
| 702 | return p + taglen + 1; |
| 703 | } |
| 704 | return NULL; |
| 705 | } |
| 706 | |
Masahiro Yamada | bca2cce | 2018-05-09 18:50:37 +0900 | [diff] [blame] | 707 | static char *get_modinfo(struct elf_info *info, const char *tag) |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 708 | |
| 709 | { |
Masahiro Yamada | bca2cce | 2018-05-09 18:50:37 +0900 | [diff] [blame] | 710 | return get_next_modinfo(info, tag, NULL); |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 711 | } |
| 712 | |
Sam Ravnborg | ff13f92 | 2008-01-23 19:54:27 +0100 | [diff] [blame] | 713 | static const char *sym_name(struct elf_info *elf, Elf_Sym *sym) |
| 714 | { |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 715 | if (sym) |
| 716 | return elf->strtab + sym->st_name; |
| 717 | else |
Sam Ravnborg | f666751 | 2008-02-06 21:51:18 +0100 | [diff] [blame] | 718 | return "(unknown)"; |
Sam Ravnborg | ff13f92 | 2008-01-23 19:54:27 +0100 | [diff] [blame] | 719 | } |
| 720 | |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 721 | /* |
| 722 | * Check whether the 'string' argument matches one of the 'patterns', |
| 723 | * an array of shell wildcard patterns (glob). |
| 724 | * |
| 725 | * Return true is there is a match. |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 726 | */ |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 727 | static bool match(const char *string, const char *const patterns[]) |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 728 | { |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 729 | const char *pattern; |
Mark Rutland | 4d94f91 | 2022-03-08 22:56:13 +0100 | [diff] [blame] | 730 | |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 731 | while ((pattern = *patterns++)) { |
| 732 | if (!fnmatch(pattern, string, 0)) |
| 733 | return true; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 734 | } |
Masahiro Yamada | a89227d | 2022-05-30 18:01:39 +0900 | [diff] [blame] | 735 | |
| 736 | return false; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 737 | } |
| 738 | |
Masahiro Yamada | 7452dd2 | 2022-08-01 18:39:00 +0900 | [diff] [blame] | 739 | /* useful to pass patterns to match() directly */ |
| 740 | #define PATTERNS(...) \ |
| 741 | ({ \ |
| 742 | static const char *const patterns[] = {__VA_ARGS__, NULL}; \ |
| 743 | patterns; \ |
| 744 | }) |
| 745 | |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 746 | /* sections that we do not want to do full section mismatch check on */ |
Mathias Krause | 7a3ee75 | 2014-08-27 20:28:53 +0930 | [diff] [blame] | 747 | static const char *const section_white_list[] = |
Sam Ravnborg | 4391ed6 | 2009-05-04 13:05:26 +0200 | [diff] [blame] | 748 | { |
| 749 | ".comment*", |
| 750 | ".debug*", |
H.J. Lu | 1121584 | 2010-12-15 17:11:22 -0800 | [diff] [blame] | 751 | ".zdebug*", /* Compressed debug sections. */ |
David Howells | 739d875 | 2018-03-08 09:48:46 +0000 | [diff] [blame] | 752 | ".GCC.command.line", /* record-gcc-switches */ |
Sam Ravnborg | 4391ed6 | 2009-05-04 13:05:26 +0200 | [diff] [blame] | 753 | ".mdebug*", /* alpha, score, mips etc. */ |
| 754 | ".pdr", /* alpha, score, mips etc. */ |
| 755 | ".stab*", |
| 756 | ".note*", |
| 757 | ".got*", |
| 758 | ".toc*", |
Max Filippov | af42e97 | 2012-09-17 05:44:38 +0400 | [diff] [blame] | 759 | ".xt.prop", /* xtensa */ |
| 760 | ".xt.lit", /* xtensa */ |
Vineet Gupta | f2e207f | 2013-01-21 17:18:57 +1030 | [diff] [blame] | 761 | ".arcextmap*", /* arc */ |
| 762 | ".gnu.linkonce.arcext*", /* arc : modules */ |
Noam Camus | d1189c6 | 2015-10-26 19:51:46 +1030 | [diff] [blame] | 763 | ".cmem*", /* EZchip */ |
| 764 | ".fmt_slot*", /* EZchip */ |
Andi Kleen | ef178f9 | 2014-02-08 09:01:17 +0100 | [diff] [blame] | 765 | ".gnu.lto*", |
Josh Poimboeuf | e390f9a | 2017-03-01 12:04:44 -0600 | [diff] [blame] | 766 | ".discard.*", |
Denis Nikitin | 1ef061a | 2023-08-25 00:27:43 -0700 | [diff] [blame] | 767 | ".llvm.call-graph-profile", /* call graph */ |
Sam Ravnborg | 4391ed6 | 2009-05-04 13:05:26 +0200 | [diff] [blame] | 768 | NULL |
| 769 | }; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 770 | |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 771 | /* |
Anders Kaseorg | b614a69 | 2009-04-23 16:49:33 -0400 | [diff] [blame] | 772 | * This is used to find sections missing the SHF_ALLOC flag. |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 773 | * The cause of this is often a section specified in assembler |
Anders Kaseorg | b614a69 | 2009-04-23 16:49:33 -0400 | [diff] [blame] | 774 | * without "ax" / "aw". |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 775 | */ |
Anders Kaseorg | b614a69 | 2009-04-23 16:49:33 -0400 | [diff] [blame] | 776 | static void check_section(const char *modname, struct elf_info *elf, |
Masahiro Yamada | bb66fc6 | 2014-06-10 19:08:13 +0900 | [diff] [blame] | 777 | Elf_Shdr *sechdr) |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 778 | { |
Anders Kaseorg | b614a69 | 2009-04-23 16:49:33 -0400 | [diff] [blame] | 779 | const char *sec = sech_name(elf, sechdr); |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 780 | |
Anders Kaseorg | b614a69 | 2009-04-23 16:49:33 -0400 | [diff] [blame] | 781 | if (sechdr->sh_type == SHT_PROGBITS && |
| 782 | !(sechdr->sh_flags & SHF_ALLOC) && |
| 783 | !match(sec, section_white_list)) { |
| 784 | warn("%s (%s): unexpected non-allocatable section.\n" |
| 785 | "Did you forget to use \"ax\"/\"aw\" in a .S file?\n" |
| 786 | "Note that for example <linux/init.h> contains\n" |
| 787 | "section definitions for use in .S files.\n\n", |
| 788 | modname, sec); |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 789 | } |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | |
| 793 | |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 794 | #define ALL_INIT_DATA_SECTIONS \ |
Rasmus Villemoes | a0d8f80 | 2014-07-27 07:28:01 +0930 | [diff] [blame] | 795 | ".init.setup", ".init.rodata", ".meminit.rodata", \ |
| 796 | ".init.data", ".meminit.data" |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 797 | |
Sebastian Andrzej Siewior | bb15d8d | 2012-06-03 20:48:17 +0200 | [diff] [blame] | 798 | #define ALL_PCI_INIT_SECTIONS \ |
Rasmus Villemoes | a0d8f80 | 2014-07-27 07:28:01 +0930 | [diff] [blame] | 799 | ".pci_fixup_early", ".pci_fixup_header", ".pci_fixup_final", \ |
| 800 | ".pci_fixup_enable", ".pci_fixup_resume", \ |
| 801 | ".pci_fixup_resume_early", ".pci_fixup_suspend" |
Sebastian Andrzej Siewior | bb15d8d | 2012-06-03 20:48:17 +0200 | [diff] [blame] | 802 | |
Masahiro Yamada | 473a45b | 2023-10-23 02:06:08 +0900 | [diff] [blame] | 803 | #define ALL_XXXINIT_SECTIONS ".meminit.*" |
Uwe Kleine-König | 4a31a22 | 2010-01-29 12:04:26 +0100 | [diff] [blame] | 804 | |
| 805 | #define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS |
Masahiro Yamada | 48cd8df | 2023-10-23 02:06:09 +0900 | [diff] [blame] | 806 | #define ALL_EXIT_SECTIONS ".exit.*" |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 807 | |
Rasmus Villemoes | a0d8f80 | 2014-07-27 07:28:01 +0930 | [diff] [blame] | 808 | #define DATA_SECTIONS ".data", ".data.rel" |
Nathan Chancellor | 19331e8 | 2022-12-13 11:35:29 -0700 | [diff] [blame] | 809 | #define TEXT_SECTIONS ".text", ".text.*", ".sched.text", \ |
Thomas Gleixner | 6553896 | 2020-03-09 22:47:17 +0100 | [diff] [blame] | 810 | ".kprobes.text", ".cpuidle.text", ".noinstr.text" |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 811 | #define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \ |
Nathan Chancellor | 19331e8 | 2022-12-13 11:35:29 -0700 | [diff] [blame] | 812 | ".fixup", ".entry.text", ".exception.text", \ |
Christophe Leroy | 1e688dd2 | 2021-04-13 16:38:10 +0000 | [diff] [blame] | 813 | ".coldtext", ".softirqentry.text" |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 814 | |
Jan Beulich | fd6c3a8 | 2009-03-12 10:58:33 +0000 | [diff] [blame] | 815 | #define INIT_SECTIONS ".init.*" |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 816 | |
Masahiro Yamada | 34fcf23 | 2023-10-23 02:06:13 +0900 | [diff] [blame] | 817 | #define ALL_TEXT_SECTIONS ".init.text", ".meminit.text", ".exit.text", \ |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 818 | TEXT_SECTIONS, OTHER_TEXT_SECTIONS |
| 819 | |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 820 | enum mismatch { |
Masahiro Yamada | b3d4f44 | 2023-10-23 02:06:12 +0900 | [diff] [blame] | 821 | TEXTDATA_TO_ANY_INIT_EXIT, |
Uwe Kleine-König | bbd3f4f | 2010-01-30 16:35:47 +0100 | [diff] [blame] | 822 | XXXINIT_TO_SOME_INIT, |
Uwe Kleine-König | bbd3f4f | 2010-01-30 16:35:47 +0100 | [diff] [blame] | 823 | ANY_INIT_TO_ANY_EXIT, |
| 824 | ANY_EXIT_TO_ANY_INIT, |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 825 | EXTABLE_TO_NON_TEXT, |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 826 | }; |
| 827 | |
Quentin Casasnovas | e5d8f59 | 2015-04-13 20:55:15 +0930 | [diff] [blame] | 828 | /** |
Bhaskar Chowdhury | f394583 | 2021-03-26 11:22:19 +0530 | [diff] [blame] | 829 | * Describe how to match sections on different criteria: |
Quentin Casasnovas | e5d8f59 | 2015-04-13 20:55:15 +0930 | [diff] [blame] | 830 | * |
| 831 | * @fromsec: Array of sections to be matched. |
| 832 | * |
| 833 | * @bad_tosec: Relocations applied to a section in @fromsec to a section in |
| 834 | * this array is forbidden (black-list). Can be empty. |
| 835 | * |
| 836 | * @good_tosec: Relocations applied to a section in @fromsec must be |
Bhaskar Chowdhury | f394583 | 2021-03-26 11:22:19 +0530 | [diff] [blame] | 837 | * targeting sections in this array (white-list). Can be empty. |
Quentin Casasnovas | e5d8f59 | 2015-04-13 20:55:15 +0930 | [diff] [blame] | 838 | * |
| 839 | * @mismatch: Type of mismatch. |
Quentin Casasnovas | e5d8f59 | 2015-04-13 20:55:15 +0930 | [diff] [blame] | 840 | */ |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 841 | struct sectioncheck { |
| 842 | const char *fromsec[20]; |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 843 | const char *bad_tosec[20]; |
| 844 | const char *good_tosec[20]; |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 845 | enum mismatch mismatch; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 846 | }; |
| 847 | |
Mathias Krause | 7a3ee75 | 2014-08-27 20:28:53 +0930 | [diff] [blame] | 848 | static const struct sectioncheck sectioncheck[] = { |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 849 | /* Do not reference init/exit code/data from |
| 850 | * normal code and data |
| 851 | */ |
| 852 | { |
Masahiro Yamada | abc2397 | 2023-05-22 01:04:22 +0900 | [diff] [blame] | 853 | .fromsec = { TEXT_SECTIONS, DATA_SECTIONS, NULL }, |
Masahiro Yamada | b3d4f44 | 2023-10-23 02:06:12 +0900 | [diff] [blame] | 854 | .bad_tosec = { ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL }, |
| 855 | .mismatch = TEXTDATA_TO_ANY_INIT_EXIT, |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 856 | }, |
Paul Gortmaker | e24f662 | 2013-06-19 19:30:48 -0400 | [diff] [blame] | 857 | /* Do not reference init code/data from meminit code/data */ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 858 | { |
Uwe Kleine-König | 4a31a22 | 2010-01-29 12:04:26 +0100 | [diff] [blame] | 859 | .fromsec = { ALL_XXXINIT_SECTIONS, NULL }, |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 860 | .bad_tosec = { INIT_SECTIONS, NULL }, |
Uwe Kleine-König | bbd3f4f | 2010-01-30 16:35:47 +0100 | [diff] [blame] | 861 | .mismatch = XXXINIT_TO_SOME_INIT, |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 862 | }, |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 863 | /* Do not use exit code/data from init code */ |
| 864 | { |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 865 | .fromsec = { ALL_INIT_SECTIONS, NULL }, |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 866 | .bad_tosec = { ALL_EXIT_SECTIONS, NULL }, |
Uwe Kleine-König | bbd3f4f | 2010-01-30 16:35:47 +0100 | [diff] [blame] | 867 | .mismatch = ANY_INIT_TO_ANY_EXIT, |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 868 | }, |
| 869 | /* Do not use init code/data from exit code */ |
| 870 | { |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 871 | .fromsec = { ALL_EXIT_SECTIONS, NULL }, |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 872 | .bad_tosec = { ALL_INIT_SECTIONS, NULL }, |
Uwe Kleine-König | bbd3f4f | 2010-01-30 16:35:47 +0100 | [diff] [blame] | 873 | .mismatch = ANY_EXIT_TO_ANY_INIT, |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 874 | }, |
Sebastian Andrzej Siewior | bb15d8d | 2012-06-03 20:48:17 +0200 | [diff] [blame] | 875 | { |
| 876 | .fromsec = { ALL_PCI_INIT_SECTIONS, NULL }, |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 877 | .bad_tosec = { INIT_SECTIONS, NULL }, |
Sebastian Andrzej Siewior | bb15d8d | 2012-06-03 20:48:17 +0200 | [diff] [blame] | 878 | .mismatch = ANY_INIT_TO_ANY_EXIT, |
Sebastian Andrzej Siewior | bb15d8d | 2012-06-03 20:48:17 +0200 | [diff] [blame] | 879 | }, |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 880 | { |
| 881 | .fromsec = { "__ex_table", NULL }, |
| 882 | /* If you're adding any new black-listed sections in here, consider |
| 883 | * adding a special 'printer' for them in scripts/check_extable. |
| 884 | */ |
| 885 | .bad_tosec = { ".altinstr_replacement", NULL }, |
| 886 | .good_tosec = {ALL_TEXT_SECTIONS , NULL}, |
| 887 | .mismatch = EXTABLE_TO_NON_TEXT, |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 888 | } |
| 889 | }; |
| 890 | |
Uwe Kleine-König | 0d2a636 | 2010-01-30 16:56:20 +0100 | [diff] [blame] | 891 | static const struct sectioncheck *section_mismatch( |
| 892 | const char *fromsec, const char *tosec) |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 893 | { |
| 894 | int i; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 895 | |
Quentin Casasnovas | c5c3439 | 2015-04-16 13:16:41 +0930 | [diff] [blame] | 896 | /* |
| 897 | * The target section could be the SHT_NUL section when we're |
| 898 | * handling relocations to un-resolved symbols, trying to match it |
David Howells | 739d875 | 2018-03-08 09:48:46 +0000 | [diff] [blame] | 899 | * doesn't make much sense and causes build failures on parisc |
| 900 | * architectures. |
Quentin Casasnovas | c5c3439 | 2015-04-16 13:16:41 +0930 | [diff] [blame] | 901 | */ |
| 902 | if (*tosec == '\0') |
| 903 | return NULL; |
| 904 | |
Masahiro Yamada | c5c468d | 2022-05-24 01:46:25 +0900 | [diff] [blame] | 905 | for (i = 0; i < ARRAY_SIZE(sectioncheck); i++) { |
| 906 | const struct sectioncheck *check = §ioncheck[i]; |
| 907 | |
Quentin Casasnovas | 050e57f | 2015-04-13 20:41:04 +0930 | [diff] [blame] | 908 | if (match(fromsec, check->fromsec)) { |
| 909 | if (check->bad_tosec[0] && match(tosec, check->bad_tosec)) |
| 910 | return check; |
| 911 | if (check->good_tosec[0] && !match(tosec, check->good_tosec)) |
| 912 | return check; |
| 913 | } |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 914 | } |
Uwe Kleine-König | 0d2a636 | 2010-01-30 16:56:20 +0100 | [diff] [blame] | 915 | return NULL; |
Sam Ravnborg | 1066822 | 2008-01-13 22:21:31 +0100 | [diff] [blame] | 916 | } |
| 917 | |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 918 | /** |
| 919 | * Whitelist to allow certain references to pass with no warning. |
Sam Ravnborg | 0e0d314 | 2007-05-17 20:14:48 +0200 | [diff] [blame] | 920 | * |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 921 | * Pattern 1: |
| 922 | * If a module parameter is declared __initdata and permissions=0 |
| 923 | * then this is legal despite the warning generated. |
| 924 | * We cannot see value of permissions here, so just ignore |
| 925 | * this pattern. |
| 926 | * The pattern is identified by: |
| 927 | * tosec = .init.data |
Sam Ravnborg | 9209aed | 2006-03-05 00:16:26 +0100 | [diff] [blame] | 928 | * fromsec = .data* |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 929 | * atsym =__param* |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 930 | * |
Rusty Russell | 6a84152 | 2010-08-11 23:04:16 -0600 | [diff] [blame] | 931 | * Pattern 1a: |
| 932 | * module_param_call() ops can refer to __init set function if permissions=0 |
| 933 | * The pattern is identified by: |
| 934 | * tosec = .init.text |
| 935 | * fromsec = .data* |
| 936 | * atsym = __param_ops_* |
| 937 | * |
Vivek Goyal | ee6a854 | 2007-01-11 01:52:44 +0100 | [diff] [blame] | 938 | * Pattern 3: |
Sam Ravnborg | c993971 | 2009-04-26 11:17:42 +0200 | [diff] [blame] | 939 | * Whitelist all references from .head.text to any init section |
Sam Ravnborg | 9bf8cb9 | 2007-02-26 17:49:06 +0100 | [diff] [blame] | 940 | * |
Sam Ravnborg | 1d8af55 | 2007-06-03 00:41:22 +0200 | [diff] [blame] | 941 | * Pattern 4: |
Vivek Goyal | ee6a854 | 2007-01-11 01:52:44 +0100 | [diff] [blame] | 942 | * Some symbols belong to init section but still it is ok to reference |
| 943 | * these from non-init sections as these symbols don't have any memory |
| 944 | * allocated for them and symbol address and value are same. So even |
| 945 | * if init section is freed, its ok to reference those symbols. |
| 946 | * For ex. symbols marking the init section boundaries. |
| 947 | * This pattern is identified by |
| 948 | * refsymname = __init_begin, _sinittext, _einittext |
Sam Ravnborg | 9bf8cb9 | 2007-02-26 17:49:06 +0100 | [diff] [blame] | 949 | * |
Paul Gortmaker | 4a3893d | 2015-04-20 10:20:40 +0930 | [diff] [blame] | 950 | * Pattern 5: |
| 951 | * GCC may optimize static inlines when fed constant arg(s) resulting |
| 952 | * in functions like cpumask_empty() -- generating an associated symbol |
| 953 | * cpumask_empty.constprop.3 that appears in the audit. If the const that |
| 954 | * is passed in comes from __init, like say nmi_ipi_mask, we get a |
| 955 | * meaningless section warning. May need to add isra symbols too... |
| 956 | * This pattern is identified by |
| 957 | * tosec = init section |
| 958 | * fromsec = text section |
| 959 | * refsymname = *.constprop.* |
| 960 | * |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 961 | **/ |
Masahiro Yamada | 05bb070 | 2023-05-22 01:04:09 +0900 | [diff] [blame] | 962 | static int secref_whitelist(const char *fromsec, const char *fromsym, |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 963 | const char *tosec, const char *tosym) |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 964 | { |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 965 | /* Check for pattern 1 */ |
Masahiro Yamada | 1df380f | 2023-05-22 01:04:23 +0900 | [diff] [blame] | 966 | if (match(tosec, PATTERNS(ALL_INIT_DATA_SECTIONS)) && |
| 967 | match(fromsec, PATTERNS(DATA_SECTIONS)) && |
Masahiro Yamada | d62c476 | 2018-05-09 18:50:38 +0900 | [diff] [blame] | 968 | strstarts(fromsym, "__param")) |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 969 | return 0; |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 970 | |
Rusty Russell | 6a84152 | 2010-08-11 23:04:16 -0600 | [diff] [blame] | 971 | /* Check for pattern 1a */ |
| 972 | if (strcmp(tosec, ".init.text") == 0 && |
Masahiro Yamada | 1df380f | 2023-05-22 01:04:23 +0900 | [diff] [blame] | 973 | match(fromsec, PATTERNS(DATA_SECTIONS)) && |
Masahiro Yamada | d62c476 | 2018-05-09 18:50:38 +0900 | [diff] [blame] | 974 | strstarts(fromsym, "__param_ops_")) |
Rusty Russell | 6a84152 | 2010-08-11 23:04:16 -0600 | [diff] [blame] | 975 | return 0; |
| 976 | |
Masahiro Yamada | 672fb67 | 2022-08-01 18:39:02 +0900 | [diff] [blame] | 977 | /* symbols in data sections that may refer to any init/exit sections */ |
| 978 | if (match(fromsec, PATTERNS(DATA_SECTIONS)) && |
| 979 | match(tosec, PATTERNS(ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS)) && |
Masahiro Yamada | e1dc1bf | 2023-10-23 02:06:07 +0900 | [diff] [blame] | 980 | match(fromsym, PATTERNS("*_ops", "*_probe", "*_console"))) |
Masahiro Yamada | 672fb67 | 2022-08-01 18:39:02 +0900 | [diff] [blame] | 981 | return 0; |
| 982 | |
Uwe Kleine-König | f177cd0 | 2023-09-30 18:52:04 +0200 | [diff] [blame] | 983 | /* |
| 984 | * symbols in data sections must not refer to .exit.*, but there are |
| 985 | * quite a few offenders, so hide these unless for W=1 builds until |
| 986 | * these are fixed. |
| 987 | */ |
| 988 | if (!extra_warn && |
| 989 | match(fromsec, PATTERNS(DATA_SECTIONS)) && |
Masahiro Yamada | 48cd8df | 2023-10-23 02:06:09 +0900 | [diff] [blame] | 990 | match(tosec, PATTERNS(ALL_EXIT_SECTIONS)) && |
Masahiro Yamada | 672fb67 | 2022-08-01 18:39:02 +0900 | [diff] [blame] | 991 | match(fromsym, PATTERNS("*driver"))) |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 992 | return 0; |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 993 | |
Sam Ravnborg | 9bf8cb9 | 2007-02-26 17:49:06 +0100 | [diff] [blame] | 994 | /* Check for pattern 3 */ |
Masahiro Yamada | 1df380f | 2023-05-22 01:04:23 +0900 | [diff] [blame] | 995 | if (strstarts(fromsec, ".head.text") && |
| 996 | match(tosec, PATTERNS(ALL_INIT_SECTIONS))) |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 997 | return 0; |
Sam Ravnborg | 9bf8cb9 | 2007-02-26 17:49:06 +0100 | [diff] [blame] | 998 | |
Sam Ravnborg | 1d8af55 | 2007-06-03 00:41:22 +0200 | [diff] [blame] | 999 | /* Check for pattern 4 */ |
Masahiro Yamada | 1df380f | 2023-05-22 01:04:23 +0900 | [diff] [blame] | 1000 | if (match(tosym, PATTERNS("__init_begin", "_sinittext", "_einittext"))) |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 1001 | return 0; |
Sam Ravnborg | 9bf8cb9 | 2007-02-26 17:49:06 +0100 | [diff] [blame] | 1002 | |
Paul Gortmaker | 4a3893d | 2015-04-20 10:20:40 +0930 | [diff] [blame] | 1003 | /* Check for pattern 5 */ |
Masahiro Yamada | 1df380f | 2023-05-22 01:04:23 +0900 | [diff] [blame] | 1004 | if (match(fromsec, PATTERNS(ALL_TEXT_SECTIONS)) && |
| 1005 | match(tosec, PATTERNS(ALL_INIT_SECTIONS)) && |
| 1006 | match(fromsym, PATTERNS("*.constprop.*"))) |
Paul Walmsley | a4d26f1 | 2018-11-21 13:14:13 -0800 | [diff] [blame] | 1007 | return 0; |
| 1008 | |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 1009 | return 1; |
Sam Ravnborg | 4c8fbca | 2006-02-26 22:18:11 +0100 | [diff] [blame] | 1010 | } |
| 1011 | |
Masahiro Yamada | b1a9651 | 2023-06-01 21:09:58 +0900 | [diff] [blame] | 1012 | static Elf_Sym *find_fromsym(struct elf_info *elf, Elf_Addr addr, |
| 1013 | unsigned int secndx) |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 1014 | { |
Jack Brennen | 4074532 | 2023-09-26 08:40:44 -0400 | [diff] [blame] | 1015 | return symsearch_find_nearest(elf, addr, secndx, false, ~0); |
Sam Ravnborg | 588ccd7 | 2008-01-24 21:12:37 +0100 | [diff] [blame] | 1016 | } |
| 1017 | |
Masahiro Yamada | b1a9651 | 2023-06-01 21:09:58 +0900 | [diff] [blame] | 1018 | static Elf_Sym *find_tosym(struct elf_info *elf, Elf_Addr addr, Elf_Sym *sym) |
Quentin Casasnovas | 356ad53 | 2015-04-13 20:43:34 +0930 | [diff] [blame] | 1019 | { |
Masahiro Yamada | b1a9651 | 2023-06-01 21:09:58 +0900 | [diff] [blame] | 1020 | /* If the supplied symbol has a valid name, return it */ |
| 1021 | if (is_valid_name(elf, sym)) |
| 1022 | return sym; |
| 1023 | |
| 1024 | /* |
| 1025 | * Strive to find a better symbol name, but the resulting name may not |
| 1026 | * match the symbol referenced in the original code. |
| 1027 | */ |
Jack Brennen | 4074532 | 2023-09-26 08:40:44 -0400 | [diff] [blame] | 1028 | return symsearch_find_nearest(elf, addr, get_secindex(elf, sym), |
| 1029 | true, 20); |
Quentin Casasnovas | 356ad53 | 2015-04-13 20:43:34 +0930 | [diff] [blame] | 1030 | } |
| 1031 | |
Masahiro Yamada | f4c3548 | 2023-05-15 00:27:24 +0900 | [diff] [blame] | 1032 | static bool is_executable_section(struct elf_info *elf, unsigned int secndx) |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1033 | { |
Dan Carpenter | 3a3f1e5 | 2023-06-08 11:23:40 +0300 | [diff] [blame] | 1034 | if (secndx >= elf->num_sections) |
Masahiro Yamada | f4c3548 | 2023-05-15 00:27:24 +0900 | [diff] [blame] | 1035 | return false; |
Sam Ravnborg | e5f95c8 | 2008-02-02 18:57:18 +0100 | [diff] [blame] | 1036 | |
Masahiro Yamada | f4c3548 | 2023-05-15 00:27:24 +0900 | [diff] [blame] | 1037 | return (elf->sechdrs[secndx].sh_flags & SHF_EXECINSTR) != 0; |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 1038 | } |
| 1039 | |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1040 | static void default_mismatch_handler(const char *modname, struct elf_info *elf, |
| 1041 | const struct sectioncheck* const mismatch, |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1042 | Elf_Sym *tsym, |
| 1043 | unsigned int fsecndx, const char *fromsec, Elf_Addr faddr, |
| 1044 | const char *tosec, Elf_Addr taddr) |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1045 | { |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1046 | Elf_Sym *from; |
| 1047 | const char *tosym; |
| 1048 | const char *fromsym; |
| 1049 | |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1050 | from = find_fromsym(elf, faddr, fsecndx); |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1051 | fromsym = sym_name(elf, from); |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1052 | |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1053 | tsym = find_tosym(elf, taddr, tsym); |
Masahiro Yamada | a23e758 | 2023-05-22 01:04:11 +0900 | [diff] [blame] | 1054 | tosym = sym_name(elf, tsym); |
Quentin Casasnovas | c7a65e0 | 2015-04-13 20:43:45 +0930 | [diff] [blame] | 1055 | |
Quentin Casasnovas | 644e8f1 | 2015-04-13 20:43:17 +0930 | [diff] [blame] | 1056 | /* check whitelist - we may ignore it */ |
Masahiro Yamada | 05bb070 | 2023-05-22 01:04:09 +0900 | [diff] [blame] | 1057 | if (!secref_whitelist(fromsec, fromsym, tosec, tosym)) |
Masahiro Yamada | fc5fa862 | 2023-05-15 00:27:23 +0900 | [diff] [blame] | 1058 | return; |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 1059 | |
| 1060 | sec_mismatch_count++; |
| 1061 | |
Masahiro Yamada | f234627 | 2023-06-12 00:50:59 +0900 | [diff] [blame] | 1062 | warn("%s: section mismatch in reference: %s+0x%x (section: %s) -> %s (section: %s)\n", |
| 1063 | modname, fromsym, (unsigned int)(faddr - from->st_value), fromsec, tosym, tosec); |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 1064 | |
Masahiro Yamada | 78dac1a | 2023-06-12 00:50:58 +0900 | [diff] [blame] | 1065 | if (mismatch->mismatch == EXTABLE_TO_NON_TEXT) { |
Masahiro Yamada | 856567d | 2023-05-15 00:27:25 +0900 | [diff] [blame] | 1066 | if (match(tosec, mismatch->bad_tosec)) |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 1067 | fatal("The relocation at %s+0x%lx references\n" |
Masahiro Yamada | 856567d | 2023-05-15 00:27:25 +0900 | [diff] [blame] | 1068 | "section \"%s\" which is black-listed.\n" |
| 1069 | "Something is seriously wrong and should be fixed.\n" |
| 1070 | "You might get more information about where this is\n" |
| 1071 | "coming from by using scripts/check_extable.sh %s\n", |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1072 | fromsec, (long)faddr, tosec, modname); |
Masahiro Yamada | a23e758 | 2023-05-22 01:04:11 +0900 | [diff] [blame] | 1073 | else if (is_executable_section(elf, get_secindex(elf, tsym))) |
Masahiro Yamada | 856567d | 2023-05-15 00:27:25 +0900 | [diff] [blame] | 1074 | warn("The relocation at %s+0x%lx references\n" |
| 1075 | "section \"%s\" which is not in the list of\n" |
| 1076 | "authorized sections. If you're adding a new section\n" |
| 1077 | "and/or if this reference is valid, add \"%s\" to the\n" |
| 1078 | "list of authorized sections to jump to on fault.\n" |
| 1079 | "This can be achieved by adding \"%s\" to\n" |
| 1080 | "OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n", |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1081 | fromsec, (long)faddr, tosec, tosec, tosec); |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 1082 | else |
Masahiro Yamada | 856567d | 2023-05-15 00:27:25 +0900 | [diff] [blame] | 1083 | error("%s+0x%lx references non-executable section '%s'\n", |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1084 | fromsec, (long)faddr, tosec); |
Quentin Casasnovas | 52dc059 | 2015-04-13 20:52:53 +0930 | [diff] [blame] | 1085 | } |
| 1086 | } |
| 1087 | |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1088 | static void check_export_symbol(struct module *mod, struct elf_info *elf, |
| 1089 | Elf_Addr faddr, const char *secname, |
| 1090 | Elf_Sym *sym) |
| 1091 | { |
| 1092 | static const char *prefix = "__export_symbol_"; |
| 1093 | const char *label_name, *name, *data; |
| 1094 | Elf_Sym *label; |
| 1095 | struct symbol *s; |
| 1096 | bool is_gpl; |
| 1097 | |
| 1098 | label = find_fromsym(elf, faddr, elf->export_symbol_secndx); |
| 1099 | label_name = sym_name(elf, label); |
| 1100 | |
| 1101 | if (!strstarts(label_name, prefix)) { |
| 1102 | error("%s: .export_symbol section contains strange symbol '%s'\n", |
| 1103 | mod->name, label_name); |
| 1104 | return; |
| 1105 | } |
| 1106 | |
Masahiro Yamada | 6d62b1c | 2023-06-12 00:50:54 +0900 | [diff] [blame] | 1107 | if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL && |
| 1108 | ELF_ST_BIND(sym->st_info) != STB_WEAK) { |
| 1109 | error("%s: local symbol '%s' was exported\n", mod->name, |
| 1110 | label_name + strlen(prefix)); |
| 1111 | return; |
| 1112 | } |
| 1113 | |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1114 | name = sym_name(elf, sym); |
| 1115 | if (strcmp(label_name + strlen(prefix), name)) { |
| 1116 | error("%s: .export_symbol section references '%s', but it does not seem to be an export symbol\n", |
| 1117 | mod->name, name); |
| 1118 | return; |
| 1119 | } |
| 1120 | |
| 1121 | data = sym_get_data(elf, label); /* license */ |
| 1122 | if (!strcmp(data, "GPL")) { |
| 1123 | is_gpl = true; |
| 1124 | } else if (!strcmp(data, "")) { |
| 1125 | is_gpl = false; |
| 1126 | } else { |
| 1127 | error("%s: unknown license '%s' was specified for '%s'\n", |
| 1128 | mod->name, data, name); |
| 1129 | return; |
| 1130 | } |
| 1131 | |
| 1132 | data += strlen(data) + 1; /* namespace */ |
Masahiro Yamada | 6e7611c | 2023-06-12 00:50:55 +0900 | [diff] [blame] | 1133 | s = sym_add_exported(name, mod, is_gpl, data); |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1134 | |
| 1135 | /* |
| 1136 | * We need to be aware whether we are exporting a function or |
| 1137 | * a data on some architectures. |
| 1138 | */ |
| 1139 | s->is_func = (ELF_ST_TYPE(sym->st_info) == STT_FUNC); |
| 1140 | |
Masahiro Yamada | 08700ec | 2023-09-06 03:46:57 +0900 | [diff] [blame] | 1141 | /* |
| 1142 | * For parisc64, symbols prefixed $$ from the library have the symbol type |
| 1143 | * STT_LOPROC. They should be handled as functions too. |
| 1144 | */ |
| 1145 | if (elf->hdr->e_ident[EI_CLASS] == ELFCLASS64 && |
| 1146 | elf->hdr->e_machine == EM_PARISC && |
| 1147 | ELF_ST_TYPE(sym->st_info) == STT_LOPROC) |
| 1148 | s->is_func = true; |
| 1149 | |
Masahiro Yamada | a3df152 | 2023-10-23 02:06:10 +0900 | [diff] [blame] | 1150 | if (match(secname, PATTERNS(ALL_INIT_SECTIONS))) |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1151 | warn("%s: %s: EXPORT_SYMBOL used for init symbol. Remove __init or EXPORT_SYMBOL.\n", |
| 1152 | mod->name, name); |
Masahiro Yamada | 48cd8df | 2023-10-23 02:06:09 +0900 | [diff] [blame] | 1153 | else if (match(secname, PATTERNS(ALL_EXIT_SECTIONS))) |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1154 | warn("%s: %s: EXPORT_SYMBOL used for exit symbol. Remove __exit or EXPORT_SYMBOL.\n", |
| 1155 | mod->name, name); |
| 1156 | } |
| 1157 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1158 | static void check_section_mismatch(struct module *mod, struct elf_info *elf, |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1159 | Elf_Sym *sym, |
| 1160 | unsigned int fsecndx, const char *fromsec, |
| 1161 | Elf_Addr faddr, Elf_Addr taddr) |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 1162 | { |
Luis de Bethencourt | 0cad61d | 2018-01-16 13:21:29 +0000 | [diff] [blame] | 1163 | const char *tosec = sec_name(elf, get_secindex(elf, sym)); |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1164 | const struct sectioncheck *mismatch; |
Sam Ravnborg | 58fb0d4 | 2008-01-23 21:13:50 +0100 | [diff] [blame] | 1165 | |
Masahiro Yamada | 481461f | 2023-07-16 19:15:54 +0900 | [diff] [blame] | 1166 | if (module_enabled && elf->export_symbol_secndx == fsecndx) { |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1167 | check_export_symbol(mod, elf, faddr, tosec, sym); |
| 1168 | return; |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1169 | } |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1170 | |
| 1171 | mismatch = section_mismatch(fromsec, tosec); |
Masahiro Yamada | 856567d | 2023-05-15 00:27:25 +0900 | [diff] [blame] | 1172 | if (!mismatch) |
| 1173 | return; |
| 1174 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1175 | default_mismatch_handler(mod->name, elf, mismatch, sym, |
Masahiro Yamada | 04ed3b4 | 2023-05-22 01:04:12 +0900 | [diff] [blame] | 1176 | fsecndx, fromsec, faddr, |
| 1177 | tosec, taddr); |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1178 | } |
| 1179 | |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1180 | static Elf_Addr addend_386_rel(uint32_t *location, unsigned int r_type) |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1181 | { |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1182 | switch (r_type) { |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1183 | case R_386_32: |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1184 | return TO_NATIVE(*location); |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1185 | case R_386_PC32: |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1186 | return TO_NATIVE(*location) + 4; |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1187 | } |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1188 | |
| 1189 | return (Elf_Addr)(-1); |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1190 | } |
| 1191 | |
Tony Lindgren | 6e2e340 | 2012-02-14 21:58:56 +0100 | [diff] [blame] | 1192 | #ifndef R_ARM_CALL |
| 1193 | #define R_ARM_CALL 28 |
| 1194 | #endif |
| 1195 | #ifndef R_ARM_JUMP24 |
| 1196 | #define R_ARM_JUMP24 29 |
| 1197 | #endif |
| 1198 | |
David A. Long | c9698e5 | 2014-02-14 22:41:18 +0100 | [diff] [blame] | 1199 | #ifndef R_ARM_THM_CALL |
| 1200 | #define R_ARM_THM_CALL 10 |
| 1201 | #endif |
| 1202 | #ifndef R_ARM_THM_JUMP24 |
| 1203 | #define R_ARM_THM_JUMP24 30 |
| 1204 | #endif |
Masahiro Yamada | f5983da | 2023-06-28 01:32:05 +0900 | [diff] [blame] | 1205 | |
| 1206 | #ifndef R_ARM_MOVW_ABS_NC |
| 1207 | #define R_ARM_MOVW_ABS_NC 43 |
| 1208 | #endif |
| 1209 | |
| 1210 | #ifndef R_ARM_MOVT_ABS |
| 1211 | #define R_ARM_MOVT_ABS 44 |
| 1212 | #endif |
| 1213 | |
| 1214 | #ifndef R_ARM_THM_MOVW_ABS_NC |
| 1215 | #define R_ARM_THM_MOVW_ABS_NC 47 |
| 1216 | #endif |
| 1217 | |
| 1218 | #ifndef R_ARM_THM_MOVT_ABS |
| 1219 | #define R_ARM_THM_MOVT_ABS 48 |
| 1220 | #endif |
| 1221 | |
David A. Long | c9698e5 | 2014-02-14 22:41:18 +0100 | [diff] [blame] | 1222 | #ifndef R_ARM_THM_JUMP19 |
| 1223 | #define R_ARM_THM_JUMP19 51 |
| 1224 | #endif |
| 1225 | |
Masahiro Yamada | 56a24b8 | 2023-06-01 21:09:56 +0900 | [diff] [blame] | 1226 | static int32_t sign_extend32(int32_t value, int index) |
| 1227 | { |
| 1228 | uint8_t shift = 31 - index; |
| 1229 | |
| 1230 | return (int32_t)(value << shift) >> shift; |
| 1231 | } |
| 1232 | |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1233 | static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type) |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1234 | { |
Masahiro Yamada | 3310bae | 2023-06-01 21:10:00 +0900 | [diff] [blame] | 1235 | uint32_t inst, upper, lower, sign, j1, j2; |
Masahiro Yamada | 56a24b8 | 2023-06-01 21:09:56 +0900 | [diff] [blame] | 1236 | int32_t offset; |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1237 | |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1238 | switch (r_type) { |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1239 | case R_ARM_ABS32: |
Masahiro Yamada | 2cb7494 | 2023-06-01 21:10:01 +0900 | [diff] [blame] | 1240 | case R_ARM_REL32: |
Masahiro Yamada | b7c63520f | 2023-06-01 21:09:55 +0900 | [diff] [blame] | 1241 | inst = TO_NATIVE(*(uint32_t *)loc); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1242 | return inst + sym->st_value; |
Masahiro Yamada | 12ca2c6 | 2023-06-01 21:09:57 +0900 | [diff] [blame] | 1243 | case R_ARM_MOVW_ABS_NC: |
| 1244 | case R_ARM_MOVT_ABS: |
| 1245 | inst = TO_NATIVE(*(uint32_t *)loc); |
| 1246 | offset = sign_extend32(((inst & 0xf0000) >> 4) | (inst & 0xfff), |
| 1247 | 15); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1248 | return offset + sym->st_value; |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1249 | case R_ARM_PC24: |
Tony Lindgren | 6e2e340 | 2012-02-14 21:58:56 +0100 | [diff] [blame] | 1250 | case R_ARM_CALL: |
| 1251 | case R_ARM_JUMP24: |
Masahiro Yamada | 56a24b8 | 2023-06-01 21:09:56 +0900 | [diff] [blame] | 1252 | inst = TO_NATIVE(*(uint32_t *)loc); |
| 1253 | offset = sign_extend32((inst & 0x00ffffff) << 2, 25); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1254 | return offset + sym->st_value + 8; |
Masahiro Yamada | cd1824f | 2023-06-01 21:09:59 +0900 | [diff] [blame] | 1255 | case R_ARM_THM_MOVW_ABS_NC: |
| 1256 | case R_ARM_THM_MOVT_ABS: |
| 1257 | upper = TO_NATIVE(*(uint16_t *)loc); |
| 1258 | lower = TO_NATIVE(*((uint16_t *)loc + 1)); |
| 1259 | offset = sign_extend32(((upper & 0x000f) << 12) | |
| 1260 | ((upper & 0x0400) << 1) | |
| 1261 | ((lower & 0x7000) >> 4) | |
| 1262 | (lower & 0x00ff), |
| 1263 | 15); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1264 | return offset + sym->st_value; |
Masahiro Yamada | 3310bae | 2023-06-01 21:10:00 +0900 | [diff] [blame] | 1265 | case R_ARM_THM_JUMP19: |
| 1266 | /* |
| 1267 | * Encoding T3: |
| 1268 | * S = upper[10] |
| 1269 | * imm6 = upper[5:0] |
| 1270 | * J1 = lower[13] |
| 1271 | * J2 = lower[11] |
| 1272 | * imm11 = lower[10:0] |
| 1273 | * imm32 = SignExtend(S:J2:J1:imm6:imm11:'0') |
| 1274 | */ |
| 1275 | upper = TO_NATIVE(*(uint16_t *)loc); |
| 1276 | lower = TO_NATIVE(*((uint16_t *)loc + 1)); |
| 1277 | |
| 1278 | sign = (upper >> 10) & 1; |
| 1279 | j1 = (lower >> 13) & 1; |
| 1280 | j2 = (lower >> 11) & 1; |
| 1281 | offset = sign_extend32((sign << 20) | (j2 << 19) | (j1 << 18) | |
| 1282 | ((upper & 0x03f) << 12) | |
| 1283 | ((lower & 0x07ff) << 1), |
| 1284 | 20); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1285 | return offset + sym->st_value + 4; |
David A. Long | c9698e5 | 2014-02-14 22:41:18 +0100 | [diff] [blame] | 1286 | case R_ARM_THM_CALL: |
| 1287 | case R_ARM_THM_JUMP24: |
Masahiro Yamada | 3310bae | 2023-06-01 21:10:00 +0900 | [diff] [blame] | 1288 | /* |
| 1289 | * Encoding T4: |
| 1290 | * S = upper[10] |
| 1291 | * imm10 = upper[9:0] |
| 1292 | * J1 = lower[13] |
| 1293 | * J2 = lower[11] |
| 1294 | * imm11 = lower[10:0] |
| 1295 | * I1 = NOT(J1 XOR S) |
| 1296 | * I2 = NOT(J2 XOR S) |
| 1297 | * imm32 = SignExtend(S:I1:I2:imm10:imm11:'0') |
| 1298 | */ |
| 1299 | upper = TO_NATIVE(*(uint16_t *)loc); |
| 1300 | lower = TO_NATIVE(*((uint16_t *)loc + 1)); |
| 1301 | |
| 1302 | sign = (upper >> 10) & 1; |
| 1303 | j1 = (lower >> 13) & 1; |
| 1304 | j2 = (lower >> 11) & 1; |
| 1305 | offset = sign_extend32((sign << 24) | |
| 1306 | ((~(j1 ^ sign) & 1) << 23) | |
| 1307 | ((~(j2 ^ sign) & 1) << 22) | |
| 1308 | ((upper & 0x03ff) << 12) | |
| 1309 | ((lower & 0x07ff) << 1), |
| 1310 | 24); |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1311 | return offset + sym->st_value + 4; |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1312 | } |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1313 | |
| 1314 | return (Elf_Addr)(-1); |
Sam Ravnborg | 56a974f | 2007-07-16 22:39:35 +0200 | [diff] [blame] | 1315 | } |
| 1316 | |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1317 | static Elf_Addr addend_mips_rel(uint32_t *location, unsigned int r_type) |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1318 | { |
Masahiro Yamada | b31db65 | 2023-06-20 21:05:19 +0900 | [diff] [blame] | 1319 | uint32_t inst; |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1320 | |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1321 | inst = TO_NATIVE(*location); |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1322 | switch (r_type) { |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1323 | case R_MIPS_LO16: |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1324 | return inst & 0xffff; |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1325 | case R_MIPS_26: |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1326 | return (inst & 0x03ffffff) << 2; |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1327 | case R_MIPS_32: |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1328 | return inst; |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1329 | } |
Masahiro Yamada | a68914a | 2023-07-23 19:04:43 +0900 | [diff] [blame] | 1330 | return (Elf_Addr)(-1); |
Atsushi Nemoto | ae4ac12 | 2007-05-22 18:27:39 +0900 | [diff] [blame] | 1331 | } |
| 1332 | |
Jisheng Zhang | bb1f85d | 2021-11-18 19:22:51 +0800 | [diff] [blame] | 1333 | #ifndef EM_RISCV |
| 1334 | #define EM_RISCV 243 |
| 1335 | #endif |
| 1336 | |
| 1337 | #ifndef R_RISCV_SUB32 |
| 1338 | #define R_RISCV_SUB32 39 |
| 1339 | #endif |
| 1340 | |
Youling Tang | 3d36f42 | 2022-12-10 22:39:48 +0800 | [diff] [blame] | 1341 | #ifndef EM_LOONGARCH |
| 1342 | #define EM_LOONGARCH 258 |
| 1343 | #endif |
| 1344 | |
| 1345 | #ifndef R_LARCH_SUB32 |
| 1346 | #define R_LARCH_SUB32 55 |
| 1347 | #endif |
| 1348 | |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1349 | static void get_rel_type_and_sym(struct elf_info *elf, uint64_t r_info, |
| 1350 | unsigned int *r_type, unsigned int *r_sym) |
| 1351 | { |
| 1352 | typedef struct { |
| 1353 | Elf64_Word r_sym; /* Symbol index */ |
| 1354 | unsigned char r_ssym; /* Special symbol for 2nd relocation */ |
| 1355 | unsigned char r_type3; /* 3rd relocation type */ |
| 1356 | unsigned char r_type2; /* 2nd relocation type */ |
| 1357 | unsigned char r_type; /* 1st relocation type */ |
| 1358 | } Elf64_Mips_R_Info; |
| 1359 | |
| 1360 | bool is_64bit = (elf->hdr->e_ident[EI_CLASS] == ELFCLASS64); |
| 1361 | |
| 1362 | if (elf->hdr->e_machine == EM_MIPS && is_64bit) { |
| 1363 | Elf64_Mips_R_Info *mips64_r_info = (void *)&r_info; |
| 1364 | |
| 1365 | *r_type = mips64_r_info->r_type; |
| 1366 | *r_sym = TO_NATIVE(mips64_r_info->r_sym); |
| 1367 | return; |
| 1368 | } |
| 1369 | |
Masahiro Yamada | bd78c9d | 2023-10-08 02:04:46 +0900 | [diff] [blame] | 1370 | if (is_64bit) |
| 1371 | r_info = TO_NATIVE((Elf64_Xword)r_info); |
| 1372 | else |
| 1373 | r_info = TO_NATIVE((Elf32_Word)r_info); |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1374 | |
| 1375 | *r_type = ELF_R_TYPE(r_info); |
| 1376 | *r_sym = ELF_R_SYM(r_info); |
| 1377 | } |
| 1378 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1379 | static void section_rela(struct module *mod, struct elf_info *elf, |
Masahiro Yamada | 77f9f57 | 2023-10-08 02:04:48 +0900 | [diff] [blame] | 1380 | unsigned int fsecndx, const char *fromsec, |
| 1381 | const Elf_Rela *start, const Elf_Rela *stop) |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1382 | { |
Masahiro Yamada | 77f9f57 | 2023-10-08 02:04:48 +0900 | [diff] [blame] | 1383 | const Elf_Rela *rela; |
Sam Ravnborg | e241a63 | 2008-01-28 20:13:13 +0100 | [diff] [blame] | 1384 | |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1385 | for (rela = start; rela < stop; rela++) { |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1386 | Elf_Addr taddr, r_offset; |
| 1387 | unsigned int r_type, r_sym; |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1388 | |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1389 | r_offset = TO_NATIVE(rela->r_offset); |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1390 | get_rel_type_and_sym(elf, rela->r_info, &r_type, &r_sym); |
| 1391 | |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1392 | taddr = TO_NATIVE(rela->r_addend); |
| 1393 | |
Jisheng Zhang | bb1f85d | 2021-11-18 19:22:51 +0800 | [diff] [blame] | 1394 | switch (elf->hdr->e_machine) { |
| 1395 | case EM_RISCV: |
| 1396 | if (!strcmp("__ex_table", fromsec) && |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1397 | r_type == R_RISCV_SUB32) |
Jisheng Zhang | bb1f85d | 2021-11-18 19:22:51 +0800 | [diff] [blame] | 1398 | continue; |
| 1399 | break; |
Youling Tang | 3d36f42 | 2022-12-10 22:39:48 +0800 | [diff] [blame] | 1400 | case EM_LOONGARCH: |
| 1401 | if (!strcmp("__ex_table", fromsec) && |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1402 | r_type == R_LARCH_SUB32) |
Youling Tang | 3d36f42 | 2022-12-10 22:39:48 +0800 | [diff] [blame] | 1403 | continue; |
| 1404 | break; |
Jisheng Zhang | bb1f85d | 2021-11-18 19:22:51 +0800 | [diff] [blame] | 1405 | } |
Masahiro Yamada | a9bb3e5 | 2023-05-22 01:04:13 +0900 | [diff] [blame] | 1406 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1407 | check_section_mismatch(mod, elf, elf->symtab_start + r_sym, |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1408 | fsecndx, fromsec, r_offset, taddr); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1409 | } |
| 1410 | } |
| 1411 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1412 | static void section_rel(struct module *mod, struct elf_info *elf, |
Masahiro Yamada | 77f9f57 | 2023-10-08 02:04:48 +0900 | [diff] [blame] | 1413 | unsigned int fsecndx, const char *fromsec, |
| 1414 | const Elf_Rel *start, const Elf_Rel *stop) |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1415 | { |
Masahiro Yamada | 77f9f57 | 2023-10-08 02:04:48 +0900 | [diff] [blame] | 1416 | const Elf_Rel *rel; |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1417 | |
| 1418 | for (rel = start; rel < stop; rel++) { |
Masahiro Yamada | 8aa00e2 | 2023-06-20 21:05:20 +0900 | [diff] [blame] | 1419 | Elf_Sym *tsym; |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1420 | Elf_Addr taddr = 0, r_offset; |
| 1421 | unsigned int r_type, r_sym; |
Masahiro Yamada | b31db65 | 2023-06-20 21:05:19 +0900 | [diff] [blame] | 1422 | void *loc; |
| 1423 | |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1424 | r_offset = TO_NATIVE(rel->r_offset); |
Masahiro Yamada | 4732acb | 2023-07-23 19:04:45 +0900 | [diff] [blame] | 1425 | get_rel_type_and_sym(elf, rel->r_info, &r_type, &r_sym); |
Masahiro Yamada | b31db65 | 2023-06-20 21:05:19 +0900 | [diff] [blame] | 1426 | |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1427 | loc = sym_get_data_by_offset(elf, fsecndx, r_offset); |
Masahiro Yamada | 8e86ebe | 2023-06-20 21:05:21 +0900 | [diff] [blame] | 1428 | tsym = elf->symtab_start + r_sym; |
Masahiro Yamada | b31db65 | 2023-06-20 21:05:19 +0900 | [diff] [blame] | 1429 | |
Sam Ravnborg | ff13f92 | 2008-01-23 19:54:27 +0100 | [diff] [blame] | 1430 | switch (elf->hdr->e_machine) { |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1431 | case EM_386: |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1432 | taddr = addend_386_rel(loc, r_type); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1433 | break; |
| 1434 | case EM_ARM: |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1435 | taddr = addend_arm_rel(loc, tsym, r_type); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1436 | break; |
| 1437 | case EM_MIPS: |
Masahiro Yamada | 71d965c | 2023-07-23 19:04:44 +0900 | [diff] [blame] | 1438 | taddr = addend_mips_rel(loc, r_type); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1439 | break; |
Masahiro Yamada | 64f1404 | 2023-05-12 01:24:22 +0900 | [diff] [blame] | 1440 | default: |
| 1441 | fatal("Please add code to calculate addend for this architecture\n"); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1442 | } |
Masahiro Yamada | a9bb3e5 | 2023-05-22 01:04:13 +0900 | [diff] [blame] | 1443 | |
Masahiro Yamada | 8aa00e2 | 2023-06-20 21:05:20 +0900 | [diff] [blame] | 1444 | check_section_mismatch(mod, elf, tsym, |
Masahiro Yamada | 77f39e9 | 2023-07-23 19:04:46 +0900 | [diff] [blame] | 1445 | fsecndx, fromsec, r_offset, taddr); |
Sam Ravnborg | 5b24c07 | 2008-01-18 21:49:29 +0100 | [diff] [blame] | 1446 | } |
| 1447 | } |
| 1448 | |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1449 | /** |
| 1450 | * A module includes a number of sections that are discarded |
| 1451 | * either when loaded or when used as built-in. |
| 1452 | * For loaded modules all functions marked __init and all data |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1453 | * marked __initdata will be discarded when the module has been initialized. |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1454 | * Likewise for modules used built-in the sections marked __exit |
| 1455 | * are discarded because __exit marked function are supposed to be called |
Ben Dooks | 32be1d2 | 2008-07-29 22:33:44 -0700 | [diff] [blame] | 1456 | * only when a module is unloaded which never happens for built-in modules. |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1457 | * The check_sec_ref() function traverses all relocation records |
| 1458 | * to find all references to a section that reference a section that will |
| 1459 | * be discarded and warns about it. |
| 1460 | **/ |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1461 | static void check_sec_ref(struct module *mod, struct elf_info *elf) |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1462 | { |
| 1463 | int i; |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 1464 | |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1465 | /* Walk through all sections */ |
Denys Vlasenko | 1ce53ad | 2010-07-29 01:47:53 +0200 | [diff] [blame] | 1466 | for (i = 0; i < elf->num_sections; i++) { |
Masahiro Yamada | 29ae5c0 | 2023-10-08 02:04:47 +0900 | [diff] [blame] | 1467 | Elf_Shdr *sechdr = &elf->sechdrs[i]; |
| 1468 | |
| 1469 | check_section(mod->name, elf, sechdr); |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1470 | /* We want to process only relocation sections and not .init */ |
Masahiro Yamada | 77f9f57 | 2023-10-08 02:04:48 +0900 | [diff] [blame] | 1471 | if (sechdr->sh_type == SHT_REL || sechdr->sh_type == SHT_RELA) { |
| 1472 | /* section to which the relocation applies */ |
| 1473 | unsigned int secndx = sechdr->sh_info; |
| 1474 | const char *secname = sec_name(elf, secndx); |
| 1475 | const void *start, *stop; |
| 1476 | |
| 1477 | /* If the section is known good, skip it */ |
| 1478 | if (match(secname, section_white_list)) |
| 1479 | continue; |
| 1480 | |
| 1481 | start = sym_get_data_by_offset(elf, i, 0); |
| 1482 | stop = start + sechdr->sh_size; |
| 1483 | |
| 1484 | if (sechdr->sh_type == SHT_RELA) |
| 1485 | section_rela(mod, elf, secndx, secname, |
| 1486 | start, stop); |
| 1487 | else |
| 1488 | section_rel(mod, elf, secndx, secname, |
| 1489 | start, stop); |
| 1490 | } |
Sam Ravnborg | b39927c | 2006-02-17 22:42:02 +0100 | [diff] [blame] | 1491 | } |
| 1492 | } |
| 1493 | |
Andi Kleen | 7d02b49 | 2014-02-08 09:01:12 +0100 | [diff] [blame] | 1494 | static char *remove_dot(char *s) |
| 1495 | { |
Michal Nazarewicz | fcd38ed | 2014-07-27 07:27:01 +0930 | [diff] [blame] | 1496 | size_t n = strcspn(s, "."); |
Andi Kleen | 7d02b49 | 2014-02-08 09:01:12 +0100 | [diff] [blame] | 1497 | |
Michal Nazarewicz | fcd38ed | 2014-07-27 07:27:01 +0930 | [diff] [blame] | 1498 | if (n && s[n]) { |
| 1499 | size_t m = strspn(s + n + 1, "0123456789"); |
Alexander Lobakin | b5beffa | 2022-05-24 17:27:18 +0200 | [diff] [blame] | 1500 | if (m && (s[n + m + 1] == '.' || s[n + m + 1] == 0)) |
Andi Kleen | 7d02b49 | 2014-02-08 09:01:12 +0100 | [diff] [blame] | 1501 | s[n] = 0; |
| 1502 | } |
| 1503 | return s; |
| 1504 | } |
| 1505 | |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1506 | /* |
| 1507 | * The CRCs are recorded in .*.cmd files in the form of: |
| 1508 | * #SYMVER <name> <crc> |
| 1509 | */ |
| 1510 | static void extract_crcs_for_object(const char *object, struct module *mod) |
| 1511 | { |
| 1512 | char cmd_file[PATH_MAX]; |
| 1513 | char *buf, *p; |
| 1514 | const char *base; |
| 1515 | int dirlen, ret; |
| 1516 | |
| 1517 | base = strrchr(object, '/'); |
| 1518 | if (base) { |
| 1519 | base++; |
| 1520 | dirlen = base - object; |
| 1521 | } else { |
| 1522 | dirlen = 0; |
| 1523 | base = object; |
| 1524 | } |
| 1525 | |
| 1526 | ret = snprintf(cmd_file, sizeof(cmd_file), "%.*s.%s.cmd", |
| 1527 | dirlen, object, base); |
| 1528 | if (ret >= sizeof(cmd_file)) { |
| 1529 | error("%s: too long path was truncated\n", cmd_file); |
| 1530 | return; |
| 1531 | } |
| 1532 | |
| 1533 | buf = read_text_file(cmd_file); |
| 1534 | p = buf; |
| 1535 | |
| 1536 | while ((p = strstr(p, "\n#SYMVER "))) { |
| 1537 | char *name; |
| 1538 | size_t namelen; |
| 1539 | unsigned int crc; |
| 1540 | struct symbol *sym; |
| 1541 | |
| 1542 | name = p + strlen("\n#SYMVER "); |
| 1543 | |
| 1544 | p = strchr(name, ' '); |
| 1545 | if (!p) |
| 1546 | break; |
| 1547 | |
| 1548 | namelen = p - name; |
| 1549 | p++; |
| 1550 | |
| 1551 | if (!isdigit(*p)) |
| 1552 | continue; /* skip this line */ |
| 1553 | |
Ben Hutchings | fb27e70 | 2023-03-22 19:11:45 +0100 | [diff] [blame] | 1554 | crc = strtoul(p, &p, 0); |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1555 | if (*p != '\n') |
| 1556 | continue; /* skip this line */ |
| 1557 | |
| 1558 | name[namelen] = '\0'; |
| 1559 | |
| 1560 | /* |
| 1561 | * sym_find_with_module() may return NULL here. |
| 1562 | * It typically occurs when CONFIG_TRIM_UNUSED_KSYMS=y. |
| 1563 | * Since commit e1327a127703, genksyms calculates CRCs of all |
| 1564 | * symbols, including trimmed ones. Ignore orphan CRCs. |
| 1565 | */ |
| 1566 | sym = sym_find_with_module(name, mod); |
| 1567 | if (sym) |
| 1568 | sym_set_crc(sym, crc); |
| 1569 | } |
| 1570 | |
| 1571 | free(buf); |
| 1572 | } |
| 1573 | |
| 1574 | /* |
| 1575 | * The symbol versions (CRC) are recorded in the .*.cmd files. |
| 1576 | * Parse them to retrieve CRCs for the current module. |
| 1577 | */ |
| 1578 | static void mod_set_crcs(struct module *mod) |
| 1579 | { |
| 1580 | char objlist[PATH_MAX]; |
| 1581 | char *buf, *p, *obj; |
| 1582 | int ret; |
| 1583 | |
| 1584 | if (mod->is_vmlinux) { |
| 1585 | strcpy(objlist, ".vmlinux.objs"); |
| 1586 | } else { |
| 1587 | /* objects for a module are listed in the *.mod file. */ |
| 1588 | ret = snprintf(objlist, sizeof(objlist), "%s.mod", mod->name); |
| 1589 | if (ret >= sizeof(objlist)) { |
| 1590 | error("%s: too long path was truncated\n", objlist); |
| 1591 | return; |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | buf = read_text_file(objlist); |
| 1596 | p = buf; |
| 1597 | |
| 1598 | while ((obj = strsep(&p, "\n")) && obj[0]) |
| 1599 | extract_crcs_for_object(obj, mod); |
| 1600 | |
| 1601 | free(buf); |
| 1602 | } |
| 1603 | |
Masahiro Yamada | 8b18574 | 2018-05-09 18:50:40 +0900 | [diff] [blame] | 1604 | static void read_symbols(const char *modname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | { |
| 1606 | const char *symname; |
| 1607 | char *version; |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1608 | char *license; |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 1609 | char *namespace; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | struct module *mod; |
| 1611 | struct elf_info info = { }; |
| 1612 | Elf_Sym *sym; |
| 1613 | |
Sam Ravnborg | 85bd2fd | 2007-02-26 15:33:52 +0100 | [diff] [blame] | 1614 | if (!parse_elf(&info, modname)) |
| 1615 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 1617 | if (!strends(modname, ".o")) { |
| 1618 | error("%s: filename must be suffixed with .o\n", modname); |
| 1619 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | } |
| 1621 | |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 1622 | /* strip trailing .o */ |
| 1623 | mod = new_module(modname, strlen(modname) - strlen(".o")); |
| 1624 | |
Masahiro Yamada | 5a438af | 2020-06-01 14:57:26 +0900 | [diff] [blame] | 1625 | if (!mod->is_vmlinux) { |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1626 | license = get_modinfo(&info, "license"); |
| 1627 | if (!license) |
Masahiro Yamada | 1d6cd392 | 2020-12-01 19:34:16 +0900 | [diff] [blame] | 1628 | error("missing MODULE_LICENSE() in %s\n", modname); |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1629 | while (license) { |
Masahiro Yamada | 5066743 | 2022-05-01 17:40:08 +0900 | [diff] [blame] | 1630 | if (!license_is_gpl_compatible(license)) { |
| 1631 | mod->is_gpl_compatible = false; |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1632 | break; |
| 1633 | } |
| 1634 | license = get_next_modinfo(&info, "license", license); |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1635 | } |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1636 | |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1637 | namespace = get_modinfo(&info, "import_ns"); |
| 1638 | while (namespace) { |
| 1639 | add_namespace(&mod->imported_namespaces, namespace); |
| 1640 | namespace = get_next_modinfo(&info, "import_ns", |
| 1641 | namespace); |
| 1642 | } |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 1643 | } |
| 1644 | |
Vincenzo Palazzo | 1fffe7a | 2023-06-16 01:40:37 +0200 | [diff] [blame] | 1645 | if (extra_warn && !get_modinfo(&info, "description")) |
| 1646 | warn("missing MODULE_DESCRIPTION() in %s\n", modname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | for (sym = info.symtab_start; sym < info.symtab_stop; sym++) { |
Andi Kleen | 7d02b49 | 2014-02-08 09:01:12 +0100 | [diff] [blame] | 1648 | symname = remove_dot(info.strtab + sym->st_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | |
Masahiro Yamada | 9bd2a09 | 2019-11-15 02:42:23 +0900 | [diff] [blame] | 1650 | handle_symbol(mod, &info, sym, symname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | handle_moddevtable(mod, &info, sym, symname); |
| 1652 | } |
Denis Efremov | 15bfc23 | 2019-08-01 09:06:57 +0300 | [diff] [blame] | 1653 | |
Masahiro Yamada | 94d6cb6 | 2023-06-12 00:50:51 +0900 | [diff] [blame] | 1654 | check_sec_ref(mod, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | |
Masahiro Yamada | 5a438af | 2020-06-01 14:57:26 +0900 | [diff] [blame] | 1656 | if (!mod->is_vmlinux) { |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1657 | version = get_modinfo(&info, "version"); |
| 1658 | if (version || all_versions) |
Masahiro Yamada | e54dd93 | 2021-08-28 18:50:59 +0900 | [diff] [blame] | 1659 | get_src_version(mod->name, mod->srcversion, |
Masahiro Yamada | 4ddea2f | 2020-06-01 14:57:16 +0900 | [diff] [blame] | 1660 | sizeof(mod->srcversion) - 1); |
| 1661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | |
| 1663 | parse_elf_finish(&info); |
| 1664 | |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1665 | if (modversions) { |
| 1666 | /* |
| 1667 | * Our trick to get versioning for module struct etc. - it's |
| 1668 | * never passed as an argument to an exported function, so |
| 1669 | * the automatic versioning doesn't pick it up, but it's really |
| 1670 | * important anyhow. |
| 1671 | */ |
Masahiro Yamada | e882e89 | 2022-05-01 17:40:11 +0900 | [diff] [blame] | 1672 | sym_add_unresolved("module_layout", mod, false); |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1673 | |
| 1674 | mod_set_crcs(mod); |
| 1675 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | } |
| 1677 | |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 1678 | static void read_symbols_from_files(const char *filename) |
| 1679 | { |
| 1680 | FILE *in = stdin; |
| 1681 | char fname[PATH_MAX]; |
| 1682 | |
Masahiro Yamada | f65a486 | 2022-12-11 22:04:07 +0900 | [diff] [blame] | 1683 | in = fopen(filename, "r"); |
| 1684 | if (!in) |
| 1685 | fatal("Can't open filenames file %s: %m", filename); |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 1686 | |
| 1687 | while (fgets(fname, PATH_MAX, in) != NULL) { |
| 1688 | if (strends(fname, "\n")) |
| 1689 | fname[strlen(fname)-1] = '\0'; |
| 1690 | read_symbols(fname); |
| 1691 | } |
| 1692 | |
Masahiro Yamada | f65a486 | 2022-12-11 22:04:07 +0900 | [diff] [blame] | 1693 | fclose(in); |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 1694 | } |
| 1695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | #define SZ 500 |
| 1697 | |
| 1698 | /* We first write the generated file into memory using the |
| 1699 | * following helper, then compare to the file on disk and |
| 1700 | * only update the later if anything changed */ |
| 1701 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1702 | void __attribute__((format(printf, 2, 3))) buf_printf(struct buffer *buf, |
| 1703 | const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | { |
| 1705 | char tmp[SZ]; |
| 1706 | int len; |
| 1707 | va_list ap; |
Sam Ravnborg | 62070fa | 2006-03-03 16:46:04 +0100 | [diff] [blame] | 1708 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | va_start(ap, fmt); |
| 1710 | len = vsnprintf(tmp, SZ, fmt, ap); |
Sam Ravnborg | 7670f023 | 2006-03-16 23:04:08 -0800 | [diff] [blame] | 1711 | buf_write(buf, tmp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | va_end(ap); |
| 1713 | } |
| 1714 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1715 | void buf_write(struct buffer *buf, const char *s, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | { |
| 1717 | if (buf->size - buf->pos < len) { |
Sam Ravnborg | 7670f023 | 2006-03-16 23:04:08 -0800 | [diff] [blame] | 1718 | buf->size += len + SZ; |
Randy Dunlap | 1f3aa90 | 2018-08-15 12:30:38 -0700 | [diff] [blame] | 1719 | buf->p = NOFAIL(realloc(buf->p, buf->size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | } |
| 1721 | strncpy(buf->p + buf->pos, s, len); |
| 1722 | buf->pos += len; |
| 1723 | } |
| 1724 | |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 1725 | static void check_exports(struct module *mod) |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1726 | { |
| 1727 | struct symbol *s, *exp; |
| 1728 | |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 1729 | list_for_each_entry(s, &mod->unresolved_symbols, list) { |
Andrew Morton | 6449bd6 | 2006-06-09 20:45:06 -0700 | [diff] [blame] | 1730 | const char *basename; |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1731 | exp = find_symbol(s->name); |
Masahiro Yamada | 23beb44 | 2022-04-25 04:07:48 +0900 | [diff] [blame] | 1732 | if (!exp) { |
Masahiro Yamada | 4475dff | 2021-03-26 03:54:11 +0900 | [diff] [blame] | 1733 | if (!s->weak && nr_unresolved++ < MAX_UNRESOLVED_REPORTS) |
Jessica Yu | 93c95e5 | 2020-03-06 17:02:05 +0100 | [diff] [blame] | 1734 | modpost_log(warn_unresolved ? LOG_WARN : LOG_ERROR, |
| 1735 | "\"%s\" [%s.ko] undefined!\n", |
| 1736 | s->name, mod->name); |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1737 | continue; |
Masahiro Yamada | 3b41528 | 2018-11-23 16:57:23 +0900 | [diff] [blame] | 1738 | } |
Masahiro Yamada | 23beb44 | 2022-04-25 04:07:48 +0900 | [diff] [blame] | 1739 | if (exp->module == mod) { |
| 1740 | error("\"%s\" [%s.ko] was exported without definition\n", |
| 1741 | s->name, mod->name); |
| 1742 | continue; |
| 1743 | } |
Masahiro Yamada | 4cae77a | 2022-04-25 04:07:49 +0900 | [diff] [blame] | 1744 | |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 1745 | exp->used = true; |
Masahiro Yamada | 4cae77a | 2022-04-25 04:07:49 +0900 | [diff] [blame] | 1746 | s->module = exp->module; |
| 1747 | s->crc_valid = exp->crc_valid; |
| 1748 | s->crc = exp->crc; |
| 1749 | |
Andrew Morton | 6449bd6 | 2006-06-09 20:45:06 -0700 | [diff] [blame] | 1750 | basename = strrchr(mod->name, '/'); |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1751 | if (basename) |
| 1752 | basename++; |
Sam Ravnborg | c96fca2 | 2006-07-01 11:44:23 +0200 | [diff] [blame] | 1753 | else |
| 1754 | basename = mod->name; |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 1755 | |
Masahiro Yamada | 700c48b | 2023-06-12 00:50:56 +0900 | [diff] [blame] | 1756 | if (!contains_namespace(&mod->imported_namespaces, exp->namespace)) { |
Jessica Yu | 54b7784 | 2020-03-06 17:02:06 +0100 | [diff] [blame] | 1757 | modpost_log(allow_missing_ns_imports ? LOG_WARN : LOG_ERROR, |
| 1758 | "module %s uses symbol %s from namespace %s, but does not import it.\n", |
| 1759 | basename, exp->name, exp->namespace); |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 1760 | add_namespace(&mod->missing_namespaces, exp->namespace); |
Matthias Maennich | cb9b55d | 2019-09-06 11:32:28 +0100 | [diff] [blame] | 1761 | } |
| 1762 | |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 1763 | if (!mod->is_gpl_compatible && exp->is_gpl_only) |
| 1764 | error("GPL-incompatible module %s.ko uses GPL-only symbol '%s'\n", |
| 1765 | basename, exp->name); |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 1766 | } |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 1767 | } |
| 1768 | |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 1769 | static void handle_white_list_exports(const char *white_list) |
| 1770 | { |
| 1771 | char *buf, *p, *name; |
| 1772 | |
| 1773 | buf = read_text_file(white_list); |
| 1774 | p = buf; |
| 1775 | |
| 1776 | while ((name = strsep(&p, "\n"))) { |
| 1777 | struct symbol *sym = find_symbol(name); |
| 1778 | |
| 1779 | if (sym) |
| 1780 | sym->used = true; |
| 1781 | } |
| 1782 | |
| 1783 | free(buf); |
| 1784 | } |
| 1785 | |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 1786 | static void check_modname_len(struct module *mod) |
Wanlong Gao | 4fd3e4e | 2017-06-30 22:07:03 +0800 | [diff] [blame] | 1787 | { |
| 1788 | const char *mod_name; |
| 1789 | |
| 1790 | mod_name = strrchr(mod->name, '/'); |
| 1791 | if (mod_name == NULL) |
| 1792 | mod_name = mod->name; |
| 1793 | else |
| 1794 | mod_name++; |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 1795 | if (strlen(mod_name) >= MODULE_NAME_LEN) |
Masahiro Yamada | bc72d72 | 2020-12-01 19:34:14 +0900 | [diff] [blame] | 1796 | error("module name is too long [%s.ko]\n", mod->name); |
Wanlong Gao | 4fd3e4e | 2017-06-30 22:07:03 +0800 | [diff] [blame] | 1797 | } |
| 1798 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1799 | /** |
| 1800 | * Header for the generated file |
| 1801 | **/ |
| 1802 | static void add_header(struct buffer *b, struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | { |
| 1804 | buf_printf(b, "#include <linux/module.h>\n"); |
Vincenzo Frascino | f58dd03 | 2020-03-20 14:53:41 +0000 | [diff] [blame] | 1805 | /* |
| 1806 | * Include build-salt.h after module.h in order to |
| 1807 | * inherit the definitions. |
| 1808 | */ |
Leon Romanovsky | 51161bf | 2020-04-19 18:55:06 +0300 | [diff] [blame] | 1809 | buf_printf(b, "#define INCLUDE_VERMAGIC\n"); |
Vincenzo Frascino | f58dd03 | 2020-03-20 14:53:41 +0000 | [diff] [blame] | 1810 | buf_printf(b, "#include <linux/build-salt.h>\n"); |
Yonghong Song | 1fdd743 | 2021-04-01 16:27:23 -0700 | [diff] [blame] | 1811 | buf_printf(b, "#include <linux/elfnote-lto.h>\n"); |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 1812 | buf_printf(b, "#include <linux/export-internal.h>\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | buf_printf(b, "#include <linux/vermagic.h>\n"); |
| 1814 | buf_printf(b, "#include <linux/compiler.h>\n"); |
| 1815 | buf_printf(b, "\n"); |
Omar Sandoval | b9f174c | 2023-06-13 14:14:56 -0700 | [diff] [blame] | 1816 | buf_printf(b, "#ifdef CONFIG_UNWINDER_ORC\n"); |
| 1817 | buf_printf(b, "#include <asm/orc_header.h>\n"); |
| 1818 | buf_printf(b, "ORC_HEADER;\n"); |
| 1819 | buf_printf(b, "#endif\n"); |
| 1820 | buf_printf(b, "\n"); |
Laura Abbott | 9afb719 | 2018-07-05 17:49:37 -0700 | [diff] [blame] | 1821 | buf_printf(b, "BUILD_SALT;\n"); |
Yonghong Song | 1fdd743 | 2021-04-01 16:27:23 -0700 | [diff] [blame] | 1822 | buf_printf(b, "BUILD_LTO_INFO;\n"); |
Laura Abbott | 9afb719 | 2018-07-05 17:49:37 -0700 | [diff] [blame] | 1823 | buf_printf(b, "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n"); |
Kees Cook | 3e2e857 | 2017-04-21 15:35:27 -0700 | [diff] [blame] | 1825 | buf_printf(b, "MODULE_INFO(name, KBUILD_MODNAME);\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | buf_printf(b, "\n"); |
Andi Kleen | e0f244c | 2013-10-23 10:57:58 +1030 | [diff] [blame] | 1827 | buf_printf(b, "__visible struct module __this_module\n"); |
Joe Perches | 33def84 | 2020-10-21 19:36:07 -0700 | [diff] [blame] | 1828 | buf_printf(b, "__section(\".gnu.linkonce.this_module\") = {\n"); |
Greg Kroah-Hartman | 3c7ec94 | 2012-04-25 11:10:15 -0700 | [diff] [blame] | 1829 | buf_printf(b, "\t.name = KBUILD_MODNAME,\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | if (mod->has_init) |
Greg Kroah-Hartman | 3c7ec94 | 2012-04-25 11:10:15 -0700 | [diff] [blame] | 1831 | buf_printf(b, "\t.init = init_module,\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | if (mod->has_cleanup) |
| 1833 | buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD\n" |
Greg Kroah-Hartman | 3c7ec94 | 2012-04-25 11:10:15 -0700 | [diff] [blame] | 1834 | "\t.exit = cleanup_module,\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | "#endif\n"); |
Greg Kroah-Hartman | 3c7ec94 | 2012-04-25 11:10:15 -0700 | [diff] [blame] | 1836 | buf_printf(b, "\t.arch = MODULE_ARCH_INIT,\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | buf_printf(b, "};\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
Masahiro Yamada | 7fedac9 | 2022-05-05 16:22:32 +0900 | [diff] [blame] | 1839 | if (!external_module) |
Ben Hutchings | 2449b8b | 2011-10-24 15:12:28 +0200 | [diff] [blame] | 1840 | buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n"); |
Ben Hutchings | 2449b8b | 2011-10-24 15:12:28 +0200 | [diff] [blame] | 1841 | |
Masahiro Yamada | 7fedac9 | 2022-05-05 16:22:32 +0900 | [diff] [blame] | 1842 | buf_printf(b, |
| 1843 | "\n" |
| 1844 | "#ifdef CONFIG_RETPOLINE\n" |
| 1845 | "MODULE_INFO(retpoline, \"Y\");\n" |
| 1846 | "#endif\n"); |
Andi Kleen | caf7501 | 2018-01-25 15:50:28 -0800 | [diff] [blame] | 1847 | |
Masahiro Yamada | 7fedac9 | 2022-05-05 16:22:32 +0900 | [diff] [blame] | 1848 | if (strstarts(mod->name, "drivers/staging")) |
Greg Kroah-Hartman | a9860bf | 2008-09-24 14:46:44 -0700 | [diff] [blame] | 1849 | buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n"); |
David Gow | 74829dd | 2022-07-08 12:48:45 +0800 | [diff] [blame] | 1850 | |
| 1851 | if (strstarts(mod->name, "tools/testing")) |
| 1852 | buf_printf(b, "\nMODULE_INFO(test, \"Y\");\n"); |
Greg Kroah-Hartman | a9860bf | 2008-09-24 14:46:44 -0700 | [diff] [blame] | 1853 | } |
| 1854 | |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 1855 | static void add_exported_symbols(struct buffer *buf, struct module *mod) |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1856 | { |
| 1857 | struct symbol *sym; |
| 1858 | |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1859 | /* generate struct for exported symbols */ |
| 1860 | buf_printf(buf, "\n"); |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 1861 | list_for_each_entry(sym, &mod->exported_symbols, list) { |
| 1862 | if (trim_unused_exports && !sym->used) |
| 1863 | continue; |
| 1864 | |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1865 | buf_printf(buf, "KSYMTAB_%s(%s, \"%s\", \"%s\");\n", |
| 1866 | sym->is_func ? "FUNC" : "DATA", sym->name, |
Masahiro Yamada | 700c48b | 2023-06-12 00:50:56 +0900 | [diff] [blame] | 1867 | sym->is_gpl_only ? "_gpl" : "", sym->namespace); |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 1868 | } |
Masahiro Yamada | ddb5cdb | 2023-06-12 00:50:52 +0900 | [diff] [blame] | 1869 | |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1870 | if (!modversions) |
| 1871 | return; |
| 1872 | |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 1873 | /* record CRCs for exported symbols */ |
| 1874 | buf_printf(buf, "\n"); |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1875 | list_for_each_entry(sym, &mod->exported_symbols, list) { |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 1876 | if (trim_unused_exports && !sym->used) |
| 1877 | continue; |
| 1878 | |
Masahiro Yamada | 5b8a9a8 | 2022-08-09 23:11:17 +0900 | [diff] [blame] | 1879 | if (!sym->crc_valid) |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1880 | warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n" |
| 1881 | "Is \"%s\" prototyped in <asm/asm-prototypes.h>?\n", |
| 1882 | sym->name, mod->name, mod->is_vmlinux ? "" : ".ko", |
| 1883 | sym->name); |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 1884 | |
| 1885 | buf_printf(buf, "SYMBOL_CRC(%s, 0x%08x, \"%s\");\n", |
| 1886 | sym->name, sym->crc, sym->is_gpl_only ? "_gpl" : ""); |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 1887 | } |
| 1888 | } |
| 1889 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1890 | /** |
| 1891 | * Record CRCs for unresolved symbols |
| 1892 | **/ |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 1893 | static void add_versions(struct buffer *b, struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | { |
Masahiro Yamada | 4cae77a | 2022-04-25 04:07:49 +0900 | [diff] [blame] | 1895 | struct symbol *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | |
| 1897 | if (!modversions) |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 1898 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
| 1900 | buf_printf(b, "\n"); |
| 1901 | buf_printf(b, "static const struct modversion_info ____versions[]\n"); |
Joe Perches | 33def84 | 2020-10-21 19:36:07 -0700 | [diff] [blame] | 1902 | buf_printf(b, "__used __section(\"__versions\") = {\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 1904 | list_for_each_entry(s, &mod->unresolved_symbols, list) { |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 1905 | if (!s->module) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | if (!s->crc_valid) { |
Sam Ravnborg | cb80514 | 2006-01-28 16:57:26 +0100 | [diff] [blame] | 1908 | warn("\"%s\" [%s.ko] has no CRC!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | s->name, mod->name); |
| 1910 | continue; |
| 1911 | } |
Takashi Iwai | 5cfb203 | 2015-08-08 15:16:20 +0930 | [diff] [blame] | 1912 | if (strlen(s->name) >= MODULE_NAME_LEN) { |
Masahiro Yamada | bc72d72 | 2020-12-01 19:34:14 +0900 | [diff] [blame] | 1913 | error("too long symbol \"%s\" [%s.ko]\n", |
| 1914 | s->name, mod->name); |
Takashi Iwai | 5cfb203 | 2015-08-08 15:16:20 +0930 | [diff] [blame] | 1915 | break; |
| 1916 | } |
Masahiro Yamada | b2c5cdc | 2018-05-09 16:23:45 +0900 | [diff] [blame] | 1917 | buf_printf(b, "\t{ %#8x, \"%s\" },\n", |
James Hogan | a4b6a77 | 2013-03-18 19:38:56 +1030 | [diff] [blame] | 1918 | s->crc, s->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } |
| 1920 | |
| 1921 | buf_printf(b, "};\n"); |
| 1922 | } |
| 1923 | |
Masahiro Yamada | d2665ca | 2018-11-23 16:57:21 +0900 | [diff] [blame] | 1924 | static void add_depends(struct buffer *b, struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | { |
| 1926 | struct symbol *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | int first = 1; |
| 1928 | |
Masahiro Yamada | d2665ca | 2018-11-23 16:57:21 +0900 | [diff] [blame] | 1929 | /* Clear ->seen flag of modules that own symbols needed by this. */ |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 1930 | list_for_each_entry(s, &mod->unresolved_symbols, list) { |
Masahiro Yamada | d2665ca | 2018-11-23 16:57:21 +0900 | [diff] [blame] | 1931 | if (s->module) |
Masahiro Yamada | 5a438af | 2020-06-01 14:57:26 +0900 | [diff] [blame] | 1932 | s->module->seen = s->module->is_vmlinux; |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 1933 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | |
| 1935 | buf_printf(b, "\n"); |
Masahiro Yamada | 6df7e1e | 2019-09-09 20:34:22 +0900 | [diff] [blame] | 1936 | buf_printf(b, "MODULE_INFO(depends, \""); |
Masahiro Yamada | 8a69152 | 2022-05-01 17:40:12 +0900 | [diff] [blame] | 1937 | list_for_each_entry(s, &mod->unresolved_symbols, list) { |
Sam Ravnborg | a61b2df | 2007-02-26 19:46:52 +0100 | [diff] [blame] | 1938 | const char *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | if (!s->module) |
| 1940 | continue; |
| 1941 | |
| 1942 | if (s->module->seen) |
| 1943 | continue; |
| 1944 | |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 1945 | s->module->seen = true; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 1946 | p = strrchr(s->module->name, '/'); |
| 1947 | if (p) |
Sam Ravnborg | a61b2df | 2007-02-26 19:46:52 +0100 | [diff] [blame] | 1948 | p++; |
| 1949 | else |
| 1950 | p = s->module->name; |
| 1951 | buf_printf(b, "%s%s", first ? "" : ",", p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | first = 0; |
| 1953 | } |
Masahiro Yamada | 6df7e1e | 2019-09-09 20:34:22 +0900 | [diff] [blame] | 1954 | buf_printf(b, "\");\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | } |
| 1956 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1957 | static void add_srcversion(struct buffer *b, struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | { |
| 1959 | if (mod->srcversion[0]) { |
| 1960 | buf_printf(b, "\n"); |
| 1961 | buf_printf(b, "MODULE_INFO(srcversion, \"%s\");\n", |
| 1962 | mod->srcversion); |
| 1963 | } |
| 1964 | } |
| 1965 | |
Masahiro Yamada | 436b2ac | 2020-06-01 14:57:12 +0900 | [diff] [blame] | 1966 | static void write_buf(struct buffer *b, const char *fname) |
| 1967 | { |
| 1968 | FILE *file; |
| 1969 | |
Masahiro Yamada | c155a47 | 2022-04-25 04:07:46 +0900 | [diff] [blame] | 1970 | if (error_occurred) |
| 1971 | return; |
| 1972 | |
Masahiro Yamada | 436b2ac | 2020-06-01 14:57:12 +0900 | [diff] [blame] | 1973 | file = fopen(fname, "w"); |
| 1974 | if (!file) { |
| 1975 | perror(fname); |
| 1976 | exit(1); |
| 1977 | } |
| 1978 | if (fwrite(b->p, 1, b->pos, file) != b->pos) { |
| 1979 | perror(fname); |
| 1980 | exit(1); |
| 1981 | } |
| 1982 | if (fclose(file) != 0) { |
| 1983 | perror(fname); |
| 1984 | exit(1); |
| 1985 | } |
| 1986 | } |
| 1987 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 1988 | static void write_if_changed(struct buffer *b, const char *fname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
| 1990 | char *tmp; |
| 1991 | FILE *file; |
| 1992 | struct stat st; |
| 1993 | |
| 1994 | file = fopen(fname, "r"); |
| 1995 | if (!file) |
| 1996 | goto write; |
| 1997 | |
| 1998 | if (fstat(fileno(file), &st) < 0) |
| 1999 | goto close_write; |
| 2000 | |
| 2001 | if (st.st_size != b->pos) |
| 2002 | goto close_write; |
| 2003 | |
| 2004 | tmp = NOFAIL(malloc(b->pos)); |
| 2005 | if (fread(tmp, 1, b->pos, file) != b->pos) |
| 2006 | goto free_write; |
| 2007 | |
| 2008 | if (memcmp(tmp, b->p, b->pos) != 0) |
| 2009 | goto free_write; |
| 2010 | |
| 2011 | free(tmp); |
| 2012 | fclose(file); |
| 2013 | return; |
| 2014 | |
| 2015 | free_write: |
| 2016 | free(tmp); |
| 2017 | close_write: |
| 2018 | fclose(file); |
| 2019 | write: |
Masahiro Yamada | 436b2ac | 2020-06-01 14:57:12 +0900 | [diff] [blame] | 2020 | write_buf(b, fname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | } |
| 2022 | |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 2023 | static void write_vmlinux_export_c_file(struct module *mod) |
| 2024 | { |
| 2025 | struct buffer buf = { }; |
| 2026 | |
| 2027 | buf_printf(&buf, |
| 2028 | "#include <linux/export-internal.h>\n"); |
| 2029 | |
| 2030 | add_exported_symbols(&buf, mod); |
| 2031 | write_if_changed(&buf, ".vmlinux.export.c"); |
| 2032 | free(buf.p); |
| 2033 | } |
| 2034 | |
Masahiro Yamada | a44abac | 2022-05-05 16:22:33 +0900 | [diff] [blame] | 2035 | /* do sanity checks, and generate *.mod.c file */ |
| 2036 | static void write_mod_c_file(struct module *mod) |
| 2037 | { |
| 2038 | struct buffer buf = { }; |
| 2039 | char fname[PATH_MAX]; |
| 2040 | int ret; |
| 2041 | |
Masahiro Yamada | a44abac | 2022-05-05 16:22:33 +0900 | [diff] [blame] | 2042 | add_header(&buf, mod); |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 2043 | add_exported_symbols(&buf, mod); |
Masahiro Yamada | a44abac | 2022-05-05 16:22:33 +0900 | [diff] [blame] | 2044 | add_versions(&buf, mod); |
| 2045 | add_depends(&buf, mod); |
| 2046 | add_moddevtable(&buf, mod); |
| 2047 | add_srcversion(&buf, mod); |
| 2048 | |
| 2049 | ret = snprintf(fname, sizeof(fname), "%s.mod.c", mod->name); |
| 2050 | if (ret >= sizeof(fname)) { |
| 2051 | error("%s: too long path was truncated\n", fname); |
| 2052 | goto free; |
| 2053 | } |
| 2054 | |
| 2055 | write_if_changed(&buf, fname); |
| 2056 | |
| 2057 | free: |
| 2058 | free(buf.p); |
| 2059 | } |
| 2060 | |
Ram Pai | bd5cbce | 2006-06-08 22:12:53 -0700 | [diff] [blame] | 2061 | /* parse Module.symvers file. line format: |
Jessica Yu | 5190044 | 2020-03-11 18:01:20 +0100 | [diff] [blame] | 2062 | * 0x12345678<tab>symbol<tab>module<tab>export<tab>namespace |
Ram Pai | bd5cbce | 2006-06-08 22:12:53 -0700 | [diff] [blame] | 2063 | **/ |
Masahiro Yamada | 52c3416 | 2020-06-01 14:57:05 +0900 | [diff] [blame] | 2064 | static void read_dump(const char *fname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | { |
Masahiro Yamada | 70f30cf | 2020-06-01 14:57:20 +0900 | [diff] [blame] | 2066 | char *buf, *pos, *line; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | |
Masahiro Yamada | 70f30cf | 2020-06-01 14:57:20 +0900 | [diff] [blame] | 2068 | buf = read_text_file(fname); |
| 2069 | if (!buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | /* No symbol versions, silently ignore */ |
| 2071 | return; |
| 2072 | |
Masahiro Yamada | 70f30cf | 2020-06-01 14:57:20 +0900 | [diff] [blame] | 2073 | pos = buf; |
| 2074 | |
| 2075 | while ((line = get_line(&pos))) { |
Jessica Yu | 5190044 | 2020-03-11 18:01:20 +0100 | [diff] [blame] | 2076 | char *symname, *namespace, *modname, *d, *export; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | unsigned int crc; |
| 2078 | struct module *mod; |
Sam Ravnborg | 040fcc8 | 2006-01-28 22:15:55 +0100 | [diff] [blame] | 2079 | struct symbol *s; |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 2080 | bool gpl_only; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | |
| 2082 | if (!(symname = strchr(line, '\t'))) |
| 2083 | goto fail; |
| 2084 | *symname++ = '\0'; |
Jessica Yu | 5190044 | 2020-03-11 18:01:20 +0100 | [diff] [blame] | 2085 | if (!(modname = strchr(symname, '\t'))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | goto fail; |
| 2087 | *modname++ = '\0'; |
Jessica Yu | 5190044 | 2020-03-11 18:01:20 +0100 | [diff] [blame] | 2088 | if (!(export = strchr(modname, '\t'))) |
| 2089 | goto fail; |
| 2090 | *export++ = '\0'; |
| 2091 | if (!(namespace = strchr(export, '\t'))) |
| 2092 | goto fail; |
| 2093 | *namespace++ = '\0'; |
| 2094 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | crc = strtoul(line, &d, 16); |
| 2096 | if (*symname == '\0' || *modname == '\0' || *d != '\0') |
| 2097 | goto fail; |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 2098 | |
| 2099 | if (!strcmp(export, "EXPORT_SYMBOL_GPL")) { |
| 2100 | gpl_only = true; |
| 2101 | } else if (!strcmp(export, "EXPORT_SYMBOL")) { |
| 2102 | gpl_only = false; |
| 2103 | } else { |
| 2104 | error("%s: unknown license %s. skip", symname, export); |
| 2105 | continue; |
| 2106 | } |
| 2107 | |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2108 | mod = find_module(modname); |
| 2109 | if (!mod) { |
Masahiro Yamada | 8c9ce89 | 2022-05-30 18:01:38 +0900 | [diff] [blame] | 2110 | mod = new_module(modname, strlen(modname)); |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2111 | mod->from_dump = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | } |
Masahiro Yamada | 6e7611c | 2023-06-12 00:50:55 +0900 | [diff] [blame] | 2113 | s = sym_add_exported(symname, mod, gpl_only, namespace); |
Masahiro Yamada | f292d87 | 2022-05-13 20:39:21 +0900 | [diff] [blame] | 2114 | sym_set_crc(s, crc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
Masahiro Yamada | 70f30cf | 2020-06-01 14:57:20 +0900 | [diff] [blame] | 2116 | free(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | return; |
| 2118 | fail: |
Masahiro Yamada | 70f30cf | 2020-06-01 14:57:20 +0900 | [diff] [blame] | 2119 | free(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | fatal("parse error in symbol dump file\n"); |
| 2121 | } |
| 2122 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 2123 | static void write_dump(const char *fname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | { |
| 2125 | struct buffer buf = { }; |
Masahiro Yamada | f841536 | 2022-05-01 17:40:15 +0900 | [diff] [blame] | 2126 | struct module *mod; |
| 2127 | struct symbol *sym; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
Masahiro Yamada | f841536 | 2022-05-01 17:40:15 +0900 | [diff] [blame] | 2129 | list_for_each_entry(mod, &modules, list) { |
| 2130 | if (mod->from_dump) |
| 2131 | continue; |
| 2132 | list_for_each_entry(sym, &mod->exported_symbols, list) { |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 2133 | if (trim_unused_exports && !sym->used) |
| 2134 | continue; |
| 2135 | |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 2136 | buf_printf(&buf, "0x%08x\t%s\t%s\tEXPORT_SYMBOL%s\t%s\n", |
Masahiro Yamada | f841536 | 2022-05-01 17:40:15 +0900 | [diff] [blame] | 2137 | sym->crc, sym->name, mod->name, |
Masahiro Yamada | 2a66c31 | 2022-05-09 04:06:19 +0900 | [diff] [blame] | 2138 | sym->is_gpl_only ? "_GPL" : "", |
Masahiro Yamada | 700c48b | 2023-06-12 00:50:56 +0900 | [diff] [blame] | 2139 | sym->namespace); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | } |
| 2141 | } |
Masahiro Yamada | 436b2ac | 2020-06-01 14:57:12 +0900 | [diff] [blame] | 2142 | write_buf(&buf, fname); |
Heinrich Schuchardt | c7d47f2 | 2016-08-02 21:43:01 +0200 | [diff] [blame] | 2143 | free(buf.p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | } |
| 2145 | |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2146 | static void write_namespace_deps_files(const char *fname) |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2147 | { |
| 2148 | struct module *mod; |
| 2149 | struct namespace_list *ns; |
| 2150 | struct buffer ns_deps_buf = {}; |
| 2151 | |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 2152 | list_for_each_entry(mod, &modules, list) { |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2153 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 2154 | if (mod->from_dump || list_empty(&mod->missing_namespaces)) |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2155 | continue; |
| 2156 | |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2157 | buf_printf(&ns_deps_buf, "%s.ko:", mod->name); |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2158 | |
Masahiro Yamada | ab489d6 | 2022-05-01 17:40:14 +0900 | [diff] [blame] | 2159 | list_for_each_entry(ns, &mod->missing_namespaces, list) |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2160 | buf_printf(&ns_deps_buf, " %s", ns->namespace); |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2161 | |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2162 | buf_printf(&ns_deps_buf, "\n"); |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2163 | } |
Masahiro Yamada | 0241ea8 | 2019-11-07 00:19:59 +0900 | [diff] [blame] | 2164 | |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2165 | write_if_changed(&ns_deps_buf, fname); |
Masahiro Yamada | 0241ea8 | 2019-11-07 00:19:59 +0900 | [diff] [blame] | 2166 | free(ns_deps_buf.p); |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2167 | } |
| 2168 | |
Masahiro Yamada | 7924799 | 2020-06-01 14:57:07 +0900 | [diff] [blame] | 2169 | struct dump_list { |
Masahiro Yamada | 4484054 | 2022-05-01 17:40:13 +0900 | [diff] [blame] | 2170 | struct list_head list; |
Richard Hacker | 2d04b5a | 2008-02-28 09:40:52 +0100 | [diff] [blame] | 2171 | const char *file; |
| 2172 | }; |
| 2173 | |
Sam Ravnborg | 5c3ead8 | 2006-01-28 17:19:35 +0100 | [diff] [blame] | 2174 | int main(int argc, char **argv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | { |
| 2176 | struct module *mod; |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2177 | char *missing_namespace_deps = NULL; |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 2178 | char *unused_exports_white_list = NULL; |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 2179 | char *dump_write = NULL, *files_source = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | int opt; |
Masahiro Yamada | 4484054 | 2022-05-01 17:40:13 +0900 | [diff] [blame] | 2181 | LIST_HEAD(dump_lists); |
| 2182 | struct dump_list *dl, *dl2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | |
Masahiro Yamada | 481461f | 2023-07-16 19:15:54 +0900 | [diff] [blame] | 2184 | while ((opt = getopt(argc, argv, "ei:MmnT:to:au:WwENd:")) != -1) { |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2185 | switch (opt) { |
Richard Hacker | 2d04b5a | 2008-02-28 09:40:52 +0100 | [diff] [blame] | 2186 | case 'e': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2187 | external_module = true; |
Masahiro Yamada | e3fb4df | 2020-06-01 14:57:08 +0900 | [diff] [blame] | 2188 | break; |
| 2189 | case 'i': |
Masahiro Yamada | 4484054 | 2022-05-01 17:40:13 +0900 | [diff] [blame] | 2190 | dl = NOFAIL(malloc(sizeof(*dl))); |
| 2191 | dl->file = optarg; |
| 2192 | list_add_tail(&dl->list, &dump_lists); |
Richard Hacker | 2d04b5a | 2008-02-28 09:40:52 +0100 | [diff] [blame] | 2193 | break; |
Masahiro Yamada | 481461f | 2023-07-16 19:15:54 +0900 | [diff] [blame] | 2194 | case 'M': |
| 2195 | module_enabled = true; |
| 2196 | break; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2197 | case 'm': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2198 | modversions = true; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2199 | break; |
Guenter Roeck | eed380f | 2013-09-23 15:23:54 +0930 | [diff] [blame] | 2200 | case 'n': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2201 | ignore_missing_files = true; |
Guenter Roeck | eed380f | 2013-09-23 15:23:54 +0930 | [diff] [blame] | 2202 | break; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2203 | case 'o': |
| 2204 | dump_write = optarg; |
| 2205 | break; |
| 2206 | case 'a': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2207 | all_versions = true; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2208 | break; |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 2209 | case 'T': |
| 2210 | files_source = optarg; |
| 2211 | break; |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 2212 | case 't': |
| 2213 | trim_unused_exports = true; |
| 2214 | break; |
| 2215 | case 'u': |
| 2216 | unused_exports_white_list = optarg; |
| 2217 | break; |
Masahiro Yamada | 20ff368 | 2023-06-06 18:41:59 +0900 | [diff] [blame] | 2218 | case 'W': |
| 2219 | extra_warn = true; |
| 2220 | break; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2221 | case 'w': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2222 | warn_unresolved = true; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2223 | break; |
Nicolas Boichat | 47490ec | 2015-10-06 09:44:42 +1030 | [diff] [blame] | 2224 | case 'E': |
Masahiro Yamada | c7299d9 | 2020-12-01 19:34:18 +0900 | [diff] [blame] | 2225 | sec_mismatch_warn_only = false; |
Nicolas Boichat | 47490ec | 2015-10-06 09:44:42 +1030 | [diff] [blame] | 2226 | break; |
Jessica Yu | 54b7784 | 2020-03-06 17:02:06 +0100 | [diff] [blame] | 2227 | case 'N': |
Masahiro Yamada | 58e01fc | 2022-05-01 17:40:07 +0900 | [diff] [blame] | 2228 | allow_missing_ns_imports = true; |
Jessica Yu | 54b7784 | 2020-03-06 17:02:06 +0100 | [diff] [blame] | 2229 | break; |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2230 | case 'd': |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2231 | missing_namespace_deps = optarg; |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2232 | break; |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2233 | default: |
| 2234 | exit(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | } |
| 2236 | } |
| 2237 | |
Masahiro Yamada | 4484054 | 2022-05-01 17:40:13 +0900 | [diff] [blame] | 2238 | list_for_each_entry_safe(dl, dl2, &dump_lists, list) { |
| 2239 | read_dump(dl->file); |
| 2240 | list_del(&dl->list); |
| 2241 | free(dl); |
Richard Hacker | 2d04b5a | 2008-02-28 09:40:52 +0100 | [diff] [blame] | 2242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | |
Sam Ravnborg | df578e7 | 2008-01-11 19:17:15 +0100 | [diff] [blame] | 2244 | while (optind < argc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | read_symbols(argv[optind++]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | |
Rusty Russell | 712f9b4 | 2013-04-04 17:37:38 +1030 | [diff] [blame] | 2247 | if (files_source) |
| 2248 | read_symbols_from_files(files_source); |
| 2249 | |
Masahiro Yamada | 325eba05 | 2022-05-01 17:40:10 +0900 | [diff] [blame] | 2250 | list_for_each_entry(mod, &modules, list) { |
Masahiro Yamada | 5e9e95cc9 | 2023-06-12 00:50:57 +0900 | [diff] [blame] | 2251 | if (mod->from_dump || mod->is_vmlinux) |
| 2252 | continue; |
| 2253 | |
| 2254 | check_modname_len(mod); |
| 2255 | check_exports(mod); |
| 2256 | } |
| 2257 | |
| 2258 | if (unused_exports_white_list) |
| 2259 | handle_white_list_exports(unused_exports_white_list); |
| 2260 | |
| 2261 | list_for_each_entry(mod, &modules, list) { |
Masahiro Yamada | a44abac | 2022-05-05 16:22:33 +0900 | [diff] [blame] | 2262 | if (mod->from_dump) |
Sam Ravnborg | b817f6f | 2006-06-09 21:53:55 +0200 | [diff] [blame] | 2263 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | |
Masahiro Yamada | 7b45371 | 2022-05-13 20:39:22 +0900 | [diff] [blame] | 2265 | if (mod->is_vmlinux) |
| 2266 | write_vmlinux_export_c_file(mod); |
| 2267 | else |
Masahiro Yamada | a44abac | 2022-05-05 16:22:33 +0900 | [diff] [blame] | 2268 | write_mod_c_file(mod); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | } |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2270 | |
Masahiro Yamada | bbc55bd | 2019-10-29 21:38:07 +0900 | [diff] [blame] | 2271 | if (missing_namespace_deps) |
| 2272 | write_namespace_deps_files(missing_namespace_deps); |
Matthias Maennich | 1d08277 | 2019-09-06 11:32:31 +0100 | [diff] [blame] | 2273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2274 | if (dump_write) |
| 2275 | write_dump(dump_write); |
Masahiro Yamada | c7299d9 | 2020-12-01 19:34:18 +0900 | [diff] [blame] | 2276 | if (sec_mismatch_count && !sec_mismatch_warn_only) |
| 2277 | error("Section mismatches detected.\n" |
Masahiro Yamada | 46c7dd5 | 2019-02-01 13:50:45 +0900 | [diff] [blame] | 2278 | "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n"); |
Denis Efremov | 15bfc23 | 2019-08-01 09:06:57 +0300 | [diff] [blame] | 2279 | |
Masahiro Yamada | 4475dff | 2021-03-26 03:54:11 +0900 | [diff] [blame] | 2280 | if (nr_unresolved > MAX_UNRESOLVED_REPORTS) |
| 2281 | warn("suppressed %u unresolved symbol warnings because there were too many)\n", |
| 2282 | nr_unresolved - MAX_UNRESOLVED_REPORTS); |
| 2283 | |
Masahiro Yamada | 0fd3fba | 2020-12-01 19:34:15 +0900 | [diff] [blame] | 2284 | return error_occurred ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | } |