Commit | Line | Data |
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4317cf95 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
a79f248b | 2 | /* |
10916706 | 3 | * sorttable.c: Sort the kernel's table |
a79f248b | 4 | * |
57fa1899 SZ |
5 | * Added ORC unwind tables sort support and other updates: |
6 | * Copyright (C) 1999-2019 Alibaba Group Holding Limited. by: | |
7 | * Shile Zhang <shile.zhang@linux.alibaba.com> | |
8 | * | |
d59a1683 | 9 | * Copyright 2011 - 2012 Cavium, Inc. |
a79f248b DD |
10 | * |
11 | * Based on code taken from recortmcount.c which is: | |
12 | * | |
13 | * Copyright 2009 John F. Reiser <jreiser@BitWagon.com>. All rights reserved. | |
a79f248b DD |
14 | * |
15 | * Restructured to fit Linux format, as well as other updates: | |
57fa1899 | 16 | * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc. |
a79f248b DD |
17 | */ |
18 | ||
19 | /* | |
20 | * Strategy: alter the vmlinux file in-place. | |
21 | */ | |
22 | ||
23 | #include <sys/types.h> | |
24 | #include <sys/mman.h> | |
25 | #include <sys/stat.h> | |
26 | #include <getopt.h> | |
27 | #include <elf.h> | |
28 | #include <fcntl.h> | |
a79f248b DD |
29 | #include <stdio.h> |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | #include <unistd.h> | |
72b3942a YL |
33 | #include <errno.h> |
34 | #include <pthread.h> | |
a79f248b | 35 | |
d59a1683 DD |
36 | #include <tools/be_byteshift.h> |
37 | #include <tools/le_byteshift.h> | |
38 | ||
f06d19e4 VG |
39 | #ifndef EM_ARCOMPACT |
40 | #define EM_ARCOMPACT 93 | |
41 | #endif | |
42 | ||
25df8198 MF |
43 | #ifndef EM_XTENSA |
44 | #define EM_XTENSA 94 | |
45 | #endif | |
46 | ||
adace895 WD |
47 | #ifndef EM_AARCH64 |
48 | #define EM_AARCH64 183 | |
49 | #endif | |
50 | ||
372c7209 MS |
51 | #ifndef EM_MICROBLAZE |
52 | #define EM_MICROBLAZE 189 | |
53 | #endif | |
54 | ||
b3210d14 VG |
55 | #ifndef EM_ARCV2 |
56 | #define EM_ARCV2 195 | |
57 | #endif | |
58 | ||
d09c3872 MC |
59 | #ifndef EM_RISCV |
60 | #define EM_RISCV 243 | |
61 | #endif | |
62 | ||
08145b08 HC |
63 | #ifndef EM_LOONGARCH |
64 | #define EM_LOONGARCH 258 | |
65 | #endif | |
66 | ||
6402e141 SZ |
67 | static uint32_t (*r)(const uint32_t *); |
68 | static uint16_t (*r2)(const uint16_t *); | |
69 | static uint64_t (*r8)(const uint64_t *); | |
70 | static void (*w)(uint32_t, uint32_t *); | |
71 | static void (*w2)(uint16_t, uint16_t *); | |
72 | static void (*w8)(uint64_t, uint64_t *); | |
73 | typedef void (*table_sort_t)(char *, int); | |
74 | ||
a79f248b DD |
75 | /* |
76 | * Get the whole file as a programming convenience in order to avoid | |
77 | * malloc+lseek+read+free of many pieces. If successful, then mmap | |
78 | * avoids copying unused pieces; else just read the whole file. | |
79 | * Open for both read and write. | |
80 | */ | |
3c47b787 | 81 | static void *mmap_file(char const *fname, size_t *size) |
a79f248b | 82 | { |
3c47b787 SZ |
83 | int fd; |
84 | struct stat sb; | |
85 | void *addr = NULL; | |
a79f248b | 86 | |
3c47b787 SZ |
87 | fd = open(fname, O_RDWR); |
88 | if (fd < 0) { | |
a79f248b | 89 | perror(fname); |
3c47b787 SZ |
90 | return NULL; |
91 | } | |
92 | if (fstat(fd, &sb) < 0) { | |
93 | perror(fname); | |
94 | goto out; | |
a79f248b DD |
95 | } |
96 | if (!S_ISREG(sb.st_mode)) { | |
97 | fprintf(stderr, "not a regular file: %s\n", fname); | |
3c47b787 | 98 | goto out; |
a79f248b | 99 | } |
6402e141 | 100 | |
3c47b787 | 101 | addr = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
a79f248b | 102 | if (addr == MAP_FAILED) { |
a79f248b | 103 | fprintf(stderr, "Could not mmap file: %s\n", fname); |
3c47b787 | 104 | goto out; |
a79f248b | 105 | } |
3c47b787 SZ |
106 | |
107 | *size = sb.st_size; | |
108 | ||
109 | out: | |
110 | close(fd); | |
a79f248b DD |
111 | return addr; |
112 | } | |
113 | ||
d59a1683 | 114 | static uint32_t rbe(const uint32_t *x) |
a79f248b | 115 | { |
d59a1683 | 116 | return get_unaligned_be32(x); |
a79f248b | 117 | } |
6402e141 | 118 | |
d59a1683 | 119 | static uint16_t r2be(const uint16_t *x) |
a79f248b | 120 | { |
d59a1683 | 121 | return get_unaligned_be16(x); |
a79f248b | 122 | } |
6402e141 SZ |
123 | |
124 | static uint64_t r8be(const uint64_t *x) | |
a79f248b | 125 | { |
6402e141 | 126 | return get_unaligned_be64(x); |
a79f248b | 127 | } |
6402e141 | 128 | |
d59a1683 DD |
129 | static uint32_t rle(const uint32_t *x) |
130 | { | |
131 | return get_unaligned_le32(x); | |
132 | } | |
6402e141 | 133 | |
d59a1683 | 134 | static uint16_t r2le(const uint16_t *x) |
a79f248b | 135 | { |
d59a1683 | 136 | return get_unaligned_le16(x); |
a79f248b DD |
137 | } |
138 | ||
6402e141 | 139 | static uint64_t r8le(const uint64_t *x) |
d59a1683 | 140 | { |
6402e141 | 141 | return get_unaligned_le64(x); |
d59a1683 | 142 | } |
6402e141 | 143 | |
d59a1683 DD |
144 | static void wbe(uint32_t val, uint32_t *x) |
145 | { | |
146 | put_unaligned_be32(val, x); | |
147 | } | |
6402e141 | 148 | |
d59a1683 DD |
149 | static void w2be(uint16_t val, uint16_t *x) |
150 | { | |
151 | put_unaligned_be16(val, x); | |
152 | } | |
6402e141 SZ |
153 | |
154 | static void w8be(uint64_t val, uint64_t *x) | |
d59a1683 | 155 | { |
6402e141 | 156 | put_unaligned_be64(val, x); |
d59a1683 | 157 | } |
6402e141 | 158 | |
d59a1683 DD |
159 | static void wle(uint32_t val, uint32_t *x) |
160 | { | |
161 | put_unaligned_le32(val, x); | |
162 | } | |
6402e141 | 163 | |
d59a1683 | 164 | static void w2le(uint16_t val, uint16_t *x) |
a79f248b | 165 | { |
d59a1683 | 166 | put_unaligned_le16(val, x); |
a79f248b DD |
167 | } |
168 | ||
6402e141 SZ |
169 | static void w8le(uint64_t val, uint64_t *x) |
170 | { | |
171 | put_unaligned_le64(val, x); | |
172 | } | |
a79f248b | 173 | |
59c36455 JI |
174 | /* |
175 | * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of | |
176 | * the way to -256..-1, to avoid conflicting with real section | |
177 | * indices. | |
178 | */ | |
179 | #define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) | |
180 | ||
181 | static inline int is_shndx_special(unsigned int i) | |
182 | { | |
183 | return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; | |
184 | } | |
185 | ||
186 | /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ | |
187 | static inline unsigned int get_secindex(unsigned int shndx, | |
188 | unsigned int sym_offs, | |
189 | const Elf32_Word *symtab_shndx_start) | |
190 | { | |
191 | if (is_shndx_special(shndx)) | |
192 | return SPECIAL(shndx); | |
193 | if (shndx != SHN_XINDEX) | |
194 | return shndx; | |
195 | return r(&symtab_shndx_start[sym_offs]); | |
196 | } | |
197 | ||
a79f248b | 198 | /* 32 bit and 64 bit are very similar */ |
10916706 SZ |
199 | #include "sorttable.h" |
200 | #define SORTTABLE_64 | |
201 | #include "sorttable.h" | |
a79f248b | 202 | |
eb608fb3 | 203 | static int compare_relative_table(const void *a, const void *b) |
d59a1683 DD |
204 | { |
205 | int32_t av = (int32_t)r(a); | |
206 | int32_t bv = (int32_t)r(b); | |
207 | ||
208 | if (av < bv) | |
209 | return -1; | |
210 | if (av > bv) | |
211 | return 1; | |
212 | return 0; | |
213 | } | |
214 | ||
6402e141 | 215 | static void sort_relative_table(char *extab_image, int image_size) |
548acf19 | 216 | { |
6402e141 | 217 | int i = 0; |
548acf19 | 218 | |
6402e141 SZ |
219 | /* |
220 | * Do the same thing the runtime sort does, first normalize to | |
221 | * being relative to the start of the section. | |
222 | */ | |
548acf19 TL |
223 | while (i < image_size) { |
224 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
548acf19 | 225 | w(r(loc) + i, loc); |
6402e141 | 226 | i += 4; |
548acf19 TL |
227 | } |
228 | ||
6402e141 | 229 | qsort(extab_image, image_size / 8, 8, compare_relative_table); |
548acf19 | 230 | |
6402e141 | 231 | /* Now denormalize. */ |
548acf19 TL |
232 | i = 0; |
233 | while (i < image_size) { | |
234 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
548acf19 | 235 | w(r(loc) - i, loc); |
6402e141 | 236 | i += 4; |
548acf19 TL |
237 | } |
238 | } | |
239 | ||
e232333b | 240 | static void sort_relative_table_with_data(char *extab_image, int image_size) |
d6e2cc56 MR |
241 | { |
242 | int i = 0; | |
243 | ||
244 | while (i < image_size) { | |
245 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
246 | ||
247 | w(r(loc) + i, loc); | |
248 | w(r(loc + 1) + i + 4, loc + 1); | |
249 | /* Don't touch the fixup type or data */ | |
250 | ||
251 | i += sizeof(uint32_t) * 3; | |
252 | } | |
253 | ||
254 | qsort(extab_image, image_size / 12, 12, compare_relative_table); | |
255 | ||
256 | i = 0; | |
257 | while (i < image_size) { | |
258 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
259 | ||
260 | w(r(loc) - i, loc); | |
261 | w(r(loc + 1) - (i + 4), loc + 1); | |
262 | /* Don't touch the fixup type or data */ | |
263 | ||
264 | i += sizeof(uint32_t) * 3; | |
265 | } | |
266 | } | |
267 | ||
6402e141 | 268 | static int do_file(char const *const fname, void *addr) |
a79f248b | 269 | { |
3c47b787 | 270 | int rc = -1; |
6402e141 SZ |
271 | Elf32_Ehdr *ehdr = addr; |
272 | table_sort_t custom_sort = NULL; | |
a79f248b | 273 | |
a79f248b | 274 | switch (ehdr->e_ident[EI_DATA]) { |
a79f248b | 275 | case ELFDATA2LSB: |
6402e141 SZ |
276 | r = rle; |
277 | r2 = r2le; | |
278 | r8 = r8le; | |
279 | w = wle; | |
280 | w2 = w2le; | |
281 | w8 = w8le; | |
a79f248b DD |
282 | break; |
283 | case ELFDATA2MSB: | |
6402e141 SZ |
284 | r = rbe; |
285 | r2 = r2be; | |
286 | r8 = r8be; | |
287 | w = wbe; | |
288 | w2 = w2be; | |
289 | w8 = w8be; | |
a79f248b | 290 | break; |
6402e141 SZ |
291 | default: |
292 | fprintf(stderr, "unrecognized ELF data encoding %d: %s\n", | |
293 | ehdr->e_ident[EI_DATA], fname); | |
294 | return -1; | |
295 | } | |
296 | ||
297 | if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0 || | |
298 | (r2(&ehdr->e_type) != ET_EXEC && r2(&ehdr->e_type) != ET_DYN) || | |
299 | ehdr->e_ident[EI_VERSION] != EV_CURRENT) { | |
7b957b6e | 300 | fprintf(stderr, "unrecognized ET_EXEC/ET_DYN file %s\n", fname); |
3c47b787 | 301 | return -1; |
a79f248b DD |
302 | } |
303 | ||
d59a1683 | 304 | switch (r2(&ehdr->e_machine)) { |
a79f248b | 305 | case EM_386: |
e232333b | 306 | case EM_AARCH64: |
2bf847db | 307 | case EM_RISCV: |
3d66718c | 308 | case EM_S390: |
a79f248b | 309 | case EM_X86_64: |
e232333b | 310 | custom_sort = sort_relative_table_with_data; |
548acf19 | 311 | break; |
0de79858 | 312 | case EM_PARISC: |
5b9ff027 NP |
313 | case EM_PPC: |
314 | case EM_PPC64: | |
eb608fb3 HC |
315 | custom_sort = sort_relative_table; |
316 | break; | |
f06d19e4 | 317 | case EM_ARCOMPACT: |
b3210d14 | 318 | case EM_ARCV2: |
ee951c63 | 319 | case EM_ARM: |
08145b08 | 320 | case EM_LOONGARCH: |
372c7209 | 321 | case EM_MICROBLAZE: |
d59a1683 | 322 | case EM_MIPS: |
25df8198 | 323 | case EM_XTENSA: |
a79f248b | 324 | break; |
6402e141 SZ |
325 | default: |
326 | fprintf(stderr, "unrecognized e_machine %d %s\n", | |
327 | r2(&ehdr->e_machine), fname); | |
328 | return -1; | |
329 | } | |
a79f248b DD |
330 | |
331 | switch (ehdr->e_ident[EI_CLASS]) { | |
a79f248b | 332 | case ELFCLASS32: |
6402e141 SZ |
333 | if (r2(&ehdr->e_ehsize) != sizeof(Elf32_Ehdr) || |
334 | r2(&ehdr->e_shentsize) != sizeof(Elf32_Shdr)) { | |
a79f248b | 335 | fprintf(stderr, |
7b957b6e | 336 | "unrecognized ET_EXEC/ET_DYN file: %s\n", fname); |
3c47b787 | 337 | break; |
a79f248b | 338 | } |
57cafdf2 | 339 | rc = do_sort_32(ehdr, fname, custom_sort); |
a79f248b | 340 | break; |
6402e141 SZ |
341 | case ELFCLASS64: |
342 | { | |
a79f248b | 343 | Elf64_Ehdr *const ghdr = (Elf64_Ehdr *)ehdr; |
6402e141 SZ |
344 | if (r2(&ghdr->e_ehsize) != sizeof(Elf64_Ehdr) || |
345 | r2(&ghdr->e_shentsize) != sizeof(Elf64_Shdr)) { | |
a79f248b | 346 | fprintf(stderr, |
6402e141 SZ |
347 | "unrecognized ET_EXEC/ET_DYN file: %s\n", |
348 | fname); | |
3c47b787 | 349 | break; |
a79f248b | 350 | } |
57cafdf2 | 351 | rc = do_sort_64(ghdr, fname, custom_sort); |
6402e141 SZ |
352 | } |
353 | break; | |
354 | default: | |
355 | fprintf(stderr, "unrecognized ELF class %d %s\n", | |
356 | ehdr->e_ident[EI_CLASS], fname); | |
a79f248b DD |
357 | break; |
358 | } | |
a79f248b | 359 | |
3c47b787 | 360 | return rc; |
a79f248b DD |
361 | } |
362 | ||
6402e141 | 363 | int main(int argc, char *argv[]) |
a79f248b | 364 | { |
3c47b787 SZ |
365 | int i, n_error = 0; /* gcc-4.3.0 false positive complaint */ |
366 | size_t size = 0; | |
367 | void *addr = NULL; | |
a79f248b DD |
368 | |
369 | if (argc < 2) { | |
10916706 | 370 | fprintf(stderr, "usage: sorttable vmlinux...\n"); |
a79f248b DD |
371 | return 0; |
372 | } | |
373 | ||
374 | /* Process each file in turn, allowing deep failure. */ | |
375 | for (i = 1; i < argc; i++) { | |
3c47b787 SZ |
376 | addr = mmap_file(argv[i], &size); |
377 | if (!addr) { | |
378 | ++n_error; | |
379 | continue; | |
380 | } | |
a79f248b | 381 | |
3c47b787 | 382 | if (do_file(argv[i], addr)) |
a79f248b | 383 | ++n_error; |
3c47b787 SZ |
384 | |
385 | munmap(addr, size); | |
a79f248b | 386 | } |
6402e141 | 387 | |
a79f248b DD |
388 | return !!n_error; |
389 | } |