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> | |
33 | ||
d59a1683 DD |
34 | #include <tools/be_byteshift.h> |
35 | #include <tools/le_byteshift.h> | |
36 | ||
f06d19e4 VG |
37 | #ifndef EM_ARCOMPACT |
38 | #define EM_ARCOMPACT 93 | |
39 | #endif | |
40 | ||
25df8198 MF |
41 | #ifndef EM_XTENSA |
42 | #define EM_XTENSA 94 | |
43 | #endif | |
44 | ||
adace895 WD |
45 | #ifndef EM_AARCH64 |
46 | #define EM_AARCH64 183 | |
47 | #endif | |
48 | ||
372c7209 MS |
49 | #ifndef EM_MICROBLAZE |
50 | #define EM_MICROBLAZE 189 | |
51 | #endif | |
52 | ||
b3210d14 VG |
53 | #ifndef EM_ARCV2 |
54 | #define EM_ARCV2 195 | |
55 | #endif | |
56 | ||
6402e141 SZ |
57 | static uint32_t (*r)(const uint32_t *); |
58 | static uint16_t (*r2)(const uint16_t *); | |
59 | static uint64_t (*r8)(const uint64_t *); | |
60 | static void (*w)(uint32_t, uint32_t *); | |
61 | static void (*w2)(uint16_t, uint16_t *); | |
62 | static void (*w8)(uint64_t, uint64_t *); | |
63 | typedef void (*table_sort_t)(char *, int); | |
64 | ||
a79f248b DD |
65 | /* |
66 | * Get the whole file as a programming convenience in order to avoid | |
67 | * malloc+lseek+read+free of many pieces. If successful, then mmap | |
68 | * avoids copying unused pieces; else just read the whole file. | |
69 | * Open for both read and write. | |
70 | */ | |
3c47b787 | 71 | static void *mmap_file(char const *fname, size_t *size) |
a79f248b | 72 | { |
3c47b787 SZ |
73 | int fd; |
74 | struct stat sb; | |
75 | void *addr = NULL; | |
a79f248b | 76 | |
3c47b787 SZ |
77 | fd = open(fname, O_RDWR); |
78 | if (fd < 0) { | |
a79f248b | 79 | perror(fname); |
3c47b787 SZ |
80 | return NULL; |
81 | } | |
82 | if (fstat(fd, &sb) < 0) { | |
83 | perror(fname); | |
84 | goto out; | |
a79f248b DD |
85 | } |
86 | if (!S_ISREG(sb.st_mode)) { | |
87 | fprintf(stderr, "not a regular file: %s\n", fname); | |
3c47b787 | 88 | goto out; |
a79f248b | 89 | } |
6402e141 | 90 | |
3c47b787 | 91 | addr = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
a79f248b | 92 | if (addr == MAP_FAILED) { |
a79f248b | 93 | fprintf(stderr, "Could not mmap file: %s\n", fname); |
3c47b787 | 94 | goto out; |
a79f248b | 95 | } |
3c47b787 SZ |
96 | |
97 | *size = sb.st_size; | |
98 | ||
99 | out: | |
100 | close(fd); | |
a79f248b DD |
101 | return addr; |
102 | } | |
103 | ||
d59a1683 | 104 | static uint32_t rbe(const uint32_t *x) |
a79f248b | 105 | { |
d59a1683 | 106 | return get_unaligned_be32(x); |
a79f248b | 107 | } |
6402e141 | 108 | |
d59a1683 | 109 | static uint16_t r2be(const uint16_t *x) |
a79f248b | 110 | { |
d59a1683 | 111 | return get_unaligned_be16(x); |
a79f248b | 112 | } |
6402e141 SZ |
113 | |
114 | static uint64_t r8be(const uint64_t *x) | |
a79f248b | 115 | { |
6402e141 | 116 | return get_unaligned_be64(x); |
a79f248b | 117 | } |
6402e141 | 118 | |
d59a1683 DD |
119 | static uint32_t rle(const uint32_t *x) |
120 | { | |
121 | return get_unaligned_le32(x); | |
122 | } | |
6402e141 | 123 | |
d59a1683 | 124 | static uint16_t r2le(const uint16_t *x) |
a79f248b | 125 | { |
d59a1683 | 126 | return get_unaligned_le16(x); |
a79f248b DD |
127 | } |
128 | ||
6402e141 | 129 | static uint64_t r8le(const uint64_t *x) |
d59a1683 | 130 | { |
6402e141 | 131 | return get_unaligned_le64(x); |
d59a1683 | 132 | } |
6402e141 | 133 | |
d59a1683 DD |
134 | static void wbe(uint32_t val, uint32_t *x) |
135 | { | |
136 | put_unaligned_be32(val, x); | |
137 | } | |
6402e141 | 138 | |
d59a1683 DD |
139 | static void w2be(uint16_t val, uint16_t *x) |
140 | { | |
141 | put_unaligned_be16(val, x); | |
142 | } | |
6402e141 SZ |
143 | |
144 | static void w8be(uint64_t val, uint64_t *x) | |
d59a1683 | 145 | { |
6402e141 | 146 | put_unaligned_be64(val, x); |
d59a1683 | 147 | } |
6402e141 | 148 | |
d59a1683 DD |
149 | static void wle(uint32_t val, uint32_t *x) |
150 | { | |
151 | put_unaligned_le32(val, x); | |
152 | } | |
6402e141 | 153 | |
d59a1683 | 154 | static void w2le(uint16_t val, uint16_t *x) |
a79f248b | 155 | { |
d59a1683 | 156 | put_unaligned_le16(val, x); |
a79f248b DD |
157 | } |
158 | ||
6402e141 SZ |
159 | static void w8le(uint64_t val, uint64_t *x) |
160 | { | |
161 | put_unaligned_le64(val, x); | |
162 | } | |
a79f248b | 163 | |
59c36455 JI |
164 | /* |
165 | * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of | |
166 | * the way to -256..-1, to avoid conflicting with real section | |
167 | * indices. | |
168 | */ | |
169 | #define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) | |
170 | ||
171 | static inline int is_shndx_special(unsigned int i) | |
172 | { | |
173 | return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; | |
174 | } | |
175 | ||
176 | /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ | |
177 | static inline unsigned int get_secindex(unsigned int shndx, | |
178 | unsigned int sym_offs, | |
179 | const Elf32_Word *symtab_shndx_start) | |
180 | { | |
181 | if (is_shndx_special(shndx)) | |
182 | return SPECIAL(shndx); | |
183 | if (shndx != SHN_XINDEX) | |
184 | return shndx; | |
185 | return r(&symtab_shndx_start[sym_offs]); | |
186 | } | |
187 | ||
a79f248b | 188 | /* 32 bit and 64 bit are very similar */ |
10916706 SZ |
189 | #include "sorttable.h" |
190 | #define SORTTABLE_64 | |
191 | #include "sorttable.h" | |
a79f248b | 192 | |
eb608fb3 | 193 | static int compare_relative_table(const void *a, const void *b) |
d59a1683 DD |
194 | { |
195 | int32_t av = (int32_t)r(a); | |
196 | int32_t bv = (int32_t)r(b); | |
197 | ||
198 | if (av < bv) | |
199 | return -1; | |
200 | if (av > bv) | |
201 | return 1; | |
202 | return 0; | |
203 | } | |
204 | ||
6402e141 | 205 | static void sort_relative_table(char *extab_image, int image_size) |
548acf19 | 206 | { |
6402e141 | 207 | int i = 0; |
548acf19 | 208 | |
6402e141 SZ |
209 | /* |
210 | * Do the same thing the runtime sort does, first normalize to | |
211 | * being relative to the start of the section. | |
212 | */ | |
548acf19 TL |
213 | while (i < image_size) { |
214 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
548acf19 | 215 | w(r(loc) + i, loc); |
6402e141 | 216 | i += 4; |
548acf19 TL |
217 | } |
218 | ||
6402e141 | 219 | qsort(extab_image, image_size / 8, 8, compare_relative_table); |
548acf19 | 220 | |
6402e141 | 221 | /* Now denormalize. */ |
548acf19 TL |
222 | i = 0; |
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 | } | |
229 | ||
6402e141 | 230 | static void x86_sort_relative_table(char *extab_image, int image_size) |
d59a1683 | 231 | { |
6402e141 | 232 | int i = 0; |
d59a1683 | 233 | |
d59a1683 DD |
234 | while (i < image_size) { |
235 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
6402e141 | 236 | |
d59a1683 | 237 | w(r(loc) + i, loc); |
6402e141 SZ |
238 | w(r(loc + 1) + i + 4, loc + 1); |
239 | w(r(loc + 2) + i + 8, loc + 2); | |
240 | ||
241 | i += sizeof(uint32_t) * 3; | |
d59a1683 DD |
242 | } |
243 | ||
6402e141 | 244 | qsort(extab_image, image_size / 12, 12, compare_relative_table); |
d59a1683 | 245 | |
d59a1683 DD |
246 | i = 0; |
247 | while (i < image_size) { | |
248 | uint32_t *loc = (uint32_t *)(extab_image + i); | |
6402e141 | 249 | |
d59a1683 | 250 | w(r(loc) - i, loc); |
6402e141 SZ |
251 | w(r(loc + 1) - (i + 4), loc + 1); |
252 | w(r(loc + 2) - (i + 8), loc + 2); | |
253 | ||
254 | i += sizeof(uint32_t) * 3; | |
d59a1683 DD |
255 | } |
256 | } | |
a79f248b | 257 | |
6402e141 | 258 | static int do_file(char const *const fname, void *addr) |
a79f248b | 259 | { |
3c47b787 | 260 | int rc = -1; |
6402e141 SZ |
261 | Elf32_Ehdr *ehdr = addr; |
262 | table_sort_t custom_sort = NULL; | |
a79f248b | 263 | |
a79f248b | 264 | switch (ehdr->e_ident[EI_DATA]) { |
a79f248b | 265 | case ELFDATA2LSB: |
6402e141 SZ |
266 | r = rle; |
267 | r2 = r2le; | |
268 | r8 = r8le; | |
269 | w = wle; | |
270 | w2 = w2le; | |
271 | w8 = w8le; | |
a79f248b DD |
272 | break; |
273 | case ELFDATA2MSB: | |
6402e141 SZ |
274 | r = rbe; |
275 | r2 = r2be; | |
276 | r8 = r8be; | |
277 | w = wbe; | |
278 | w2 = w2be; | |
279 | w8 = w8be; | |
a79f248b | 280 | break; |
6402e141 SZ |
281 | default: |
282 | fprintf(stderr, "unrecognized ELF data encoding %d: %s\n", | |
283 | ehdr->e_ident[EI_DATA], fname); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0 || | |
288 | (r2(&ehdr->e_type) != ET_EXEC && r2(&ehdr->e_type) != ET_DYN) || | |
289 | ehdr->e_ident[EI_VERSION] != EV_CURRENT) { | |
7b957b6e | 290 | fprintf(stderr, "unrecognized ET_EXEC/ET_DYN file %s\n", fname); |
3c47b787 | 291 | return -1; |
a79f248b DD |
292 | } |
293 | ||
d59a1683 | 294 | switch (r2(&ehdr->e_machine)) { |
a79f248b | 295 | case EM_386: |
a79f248b | 296 | case EM_X86_64: |
548acf19 TL |
297 | custom_sort = x86_sort_relative_table; |
298 | break; | |
3193a98d | 299 | case EM_S390: |
6c94f27a | 300 | case EM_AARCH64: |
0de79858 | 301 | case EM_PARISC: |
5b9ff027 NP |
302 | case EM_PPC: |
303 | case EM_PPC64: | |
eb608fb3 HC |
304 | custom_sort = sort_relative_table; |
305 | break; | |
f06d19e4 | 306 | case EM_ARCOMPACT: |
b3210d14 | 307 | case EM_ARCV2: |
ee951c63 | 308 | case EM_ARM: |
372c7209 | 309 | case EM_MICROBLAZE: |
d59a1683 | 310 | case EM_MIPS: |
25df8198 | 311 | case EM_XTENSA: |
a79f248b | 312 | break; |
6402e141 SZ |
313 | default: |
314 | fprintf(stderr, "unrecognized e_machine %d %s\n", | |
315 | r2(&ehdr->e_machine), fname); | |
316 | return -1; | |
317 | } | |
a79f248b DD |
318 | |
319 | switch (ehdr->e_ident[EI_CLASS]) { | |
a79f248b | 320 | case ELFCLASS32: |
6402e141 SZ |
321 | if (r2(&ehdr->e_ehsize) != sizeof(Elf32_Ehdr) || |
322 | r2(&ehdr->e_shentsize) != sizeof(Elf32_Shdr)) { | |
a79f248b | 323 | fprintf(stderr, |
7b957b6e | 324 | "unrecognized ET_EXEC/ET_DYN file: %s\n", fname); |
3c47b787 | 325 | break; |
a79f248b | 326 | } |
57cafdf2 | 327 | rc = do_sort_32(ehdr, fname, custom_sort); |
a79f248b | 328 | break; |
6402e141 SZ |
329 | case ELFCLASS64: |
330 | { | |
a79f248b | 331 | Elf64_Ehdr *const ghdr = (Elf64_Ehdr *)ehdr; |
6402e141 SZ |
332 | if (r2(&ghdr->e_ehsize) != sizeof(Elf64_Ehdr) || |
333 | r2(&ghdr->e_shentsize) != sizeof(Elf64_Shdr)) { | |
a79f248b | 334 | fprintf(stderr, |
6402e141 SZ |
335 | "unrecognized ET_EXEC/ET_DYN file: %s\n", |
336 | fname); | |
3c47b787 | 337 | break; |
a79f248b | 338 | } |
57cafdf2 | 339 | rc = do_sort_64(ghdr, fname, custom_sort); |
6402e141 SZ |
340 | } |
341 | break; | |
342 | default: | |
343 | fprintf(stderr, "unrecognized ELF class %d %s\n", | |
344 | ehdr->e_ident[EI_CLASS], fname); | |
a79f248b DD |
345 | break; |
346 | } | |
a79f248b | 347 | |
3c47b787 | 348 | return rc; |
a79f248b DD |
349 | } |
350 | ||
6402e141 | 351 | int main(int argc, char *argv[]) |
a79f248b | 352 | { |
3c47b787 SZ |
353 | int i, n_error = 0; /* gcc-4.3.0 false positive complaint */ |
354 | size_t size = 0; | |
355 | void *addr = NULL; | |
a79f248b DD |
356 | |
357 | if (argc < 2) { | |
10916706 | 358 | fprintf(stderr, "usage: sorttable vmlinux...\n"); |
a79f248b DD |
359 | return 0; |
360 | } | |
361 | ||
362 | /* Process each file in turn, allowing deep failure. */ | |
363 | for (i = 1; i < argc; i++) { | |
3c47b787 SZ |
364 | addr = mmap_file(argv[i], &size); |
365 | if (!addr) { | |
366 | ++n_error; | |
367 | continue; | |
368 | } | |
a79f248b | 369 | |
3c47b787 | 370 | if (do_file(argv[i], addr)) |
a79f248b | 371 | ++n_error; |
3c47b787 SZ |
372 | |
373 | munmap(addr, size); | |
a79f248b | 374 | } |
6402e141 | 375 | |
a79f248b DD |
376 | return !!n_error; |
377 | } |