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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/lib/vsprintf.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | */ | |
6 | ||
7 | /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ | |
8 | /* | |
9 | * Wirzenius wrote this portably, Torvalds fucked it up :-) | |
10 | */ | |
11 | ||
7b9186f5 | 12 | /* |
1da177e4 LT |
13 | * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com> |
14 | * - changed to provide snprintf and vsnprintf functions | |
15 | * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de> | |
16 | * - scnprintf and vscnprintf | |
17 | */ | |
18 | ||
19 | #include <stdarg.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/ctype.h> | |
24 | #include <linux/kernel.h> | |
0fe1ef24 LT |
25 | #include <linux/kallsyms.h> |
26 | #include <linux/uaccess.h> | |
332d2e78 | 27 | #include <linux/ioport.h> |
8a27f7c9 | 28 | #include <net/addrconf.h> |
1da177e4 | 29 | |
4e57b681 | 30 | #include <asm/page.h> /* for PAGE_SIZE */ |
1da177e4 | 31 | #include <asm/div64.h> |
deac93df | 32 | #include <asm/sections.h> /* for dereference_function_descriptor() */ |
1da177e4 | 33 | |
9b706aee DV |
34 | /* Works only for digits and letters, but small and fast */ |
35 | #define TOLOWER(x) ((x) | 0x20) | |
36 | ||
aa46a63e HH |
37 | static unsigned int simple_guess_base(const char *cp) |
38 | { | |
39 | if (cp[0] == '0') { | |
40 | if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) | |
41 | return 16; | |
42 | else | |
43 | return 8; | |
44 | } else { | |
45 | return 10; | |
46 | } | |
47 | } | |
48 | ||
1da177e4 | 49 | /** |
922ac25c | 50 | * simple_strtoull - convert a string to an unsigned long long |
1da177e4 LT |
51 | * @cp: The start of the string |
52 | * @endp: A pointer to the end of the parsed string will be placed here | |
53 | * @base: The number base to use | |
54 | */ | |
922ac25c | 55 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
1da177e4 | 56 | { |
922ac25c | 57 | unsigned long long result = 0; |
aa46a63e HH |
58 | |
59 | if (!base) | |
60 | base = simple_guess_base(cp); | |
61 | ||
62 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') | |
63 | cp += 2; | |
64 | ||
65 | while (isxdigit(*cp)) { | |
66 | unsigned int value; | |
67 | ||
68 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; | |
69 | if (value >= base) | |
70 | break; | |
71 | result = result * base + value; | |
1da177e4 LT |
72 | cp++; |
73 | } | |
74 | if (endp) | |
75 | *endp = (char *)cp; | |
7b9186f5 | 76 | |
1da177e4 LT |
77 | return result; |
78 | } | |
922ac25c | 79 | EXPORT_SYMBOL(simple_strtoull); |
1da177e4 LT |
80 | |
81 | /** | |
922ac25c | 82 | * simple_strtoul - convert a string to an unsigned long |
1da177e4 LT |
83 | * @cp: The start of the string |
84 | * @endp: A pointer to the end of the parsed string will be placed here | |
85 | * @base: The number base to use | |
86 | */ | |
922ac25c | 87 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
1da177e4 | 88 | { |
922ac25c | 89 | return simple_strtoull(cp, endp, base); |
1da177e4 | 90 | } |
922ac25c | 91 | EXPORT_SYMBOL(simple_strtoul); |
1da177e4 LT |
92 | |
93 | /** | |
922ac25c | 94 | * simple_strtol - convert a string to a signed long |
1da177e4 LT |
95 | * @cp: The start of the string |
96 | * @endp: A pointer to the end of the parsed string will be placed here | |
97 | * @base: The number base to use | |
98 | */ | |
922ac25c | 99 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
1da177e4 | 100 | { |
922ac25c AGR |
101 | if (*cp == '-') |
102 | return -simple_strtoul(cp + 1, endp, base); | |
7b9186f5 | 103 | |
922ac25c | 104 | return simple_strtoul(cp, endp, base); |
1da177e4 | 105 | } |
922ac25c | 106 | EXPORT_SYMBOL(simple_strtol); |
1da177e4 LT |
107 | |
108 | /** | |
109 | * simple_strtoll - convert a string to a signed long long | |
110 | * @cp: The start of the string | |
111 | * @endp: A pointer to the end of the parsed string will be placed here | |
112 | * @base: The number base to use | |
113 | */ | |
22d27051 | 114 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
1da177e4 | 115 | { |
7b9186f5 | 116 | if (*cp == '-') |
22d27051 | 117 | return -simple_strtoull(cp + 1, endp, base); |
7b9186f5 | 118 | |
22d27051 | 119 | return simple_strtoull(cp, endp, base); |
1da177e4 | 120 | } |
98d5ce0d | 121 | EXPORT_SYMBOL(simple_strtoll); |
1da177e4 | 122 | |
cf3b429b JP |
123 | static noinline_for_stack |
124 | int skip_atoi(const char **s) | |
1da177e4 | 125 | { |
7b9186f5 | 126 | int i = 0; |
1da177e4 LT |
127 | |
128 | while (isdigit(**s)) | |
129 | i = i*10 + *((*s)++) - '0'; | |
7b9186f5 | 130 | |
1da177e4 LT |
131 | return i; |
132 | } | |
133 | ||
4277eedd DV |
134 | /* Decimal conversion is by far the most typical, and is used |
135 | * for /proc and /sys data. This directly impacts e.g. top performance | |
136 | * with many processes running. We optimize it for speed | |
137 | * using code from | |
138 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
139 | * (with permission from the author, Douglas W. Jones). */ | |
140 | ||
141 | /* Formats correctly any integer in [0,99999]. | |
142 | * Outputs from one to five digits depending on input. | |
143 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
cf3b429b JP |
144 | static noinline_for_stack |
145 | char *put_dec_trunc(char *buf, unsigned q) | |
4277eedd DV |
146 | { |
147 | unsigned d3, d2, d1, d0; | |
148 | d1 = (q>>4) & 0xf; | |
149 | d2 = (q>>8) & 0xf; | |
150 | d3 = (q>>12); | |
151 | ||
152 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
153 | q = (d0 * 0xcd) >> 11; | |
154 | d0 = d0 - 10*q; | |
155 | *buf++ = d0 + '0'; /* least significant digit */ | |
156 | d1 = q + 9*d3 + 5*d2 + d1; | |
157 | if (d1 != 0) { | |
158 | q = (d1 * 0xcd) >> 11; | |
159 | d1 = d1 - 10*q; | |
160 | *buf++ = d1 + '0'; /* next digit */ | |
161 | ||
162 | d2 = q + 2*d2; | |
163 | if ((d2 != 0) || (d3 != 0)) { | |
164 | q = (d2 * 0xd) >> 7; | |
165 | d2 = d2 - 10*q; | |
166 | *buf++ = d2 + '0'; /* next digit */ | |
167 | ||
168 | d3 = q + 4*d3; | |
169 | if (d3 != 0) { | |
170 | q = (d3 * 0xcd) >> 11; | |
171 | d3 = d3 - 10*q; | |
172 | *buf++ = d3 + '0'; /* next digit */ | |
173 | if (q != 0) | |
7b9186f5 | 174 | *buf++ = q + '0'; /* most sign. digit */ |
4277eedd DV |
175 | } |
176 | } | |
177 | } | |
7b9186f5 | 178 | |
4277eedd DV |
179 | return buf; |
180 | } | |
181 | /* Same with if's removed. Always emits five digits */ | |
cf3b429b JP |
182 | static noinline_for_stack |
183 | char *put_dec_full(char *buf, unsigned q) | |
4277eedd DV |
184 | { |
185 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
186 | /* but anyway, gcc produces better code with full-sized ints */ | |
187 | unsigned d3, d2, d1, d0; | |
188 | d1 = (q>>4) & 0xf; | |
189 | d2 = (q>>8) & 0xf; | |
190 | d3 = (q>>12); | |
191 | ||
7b9186f5 AGR |
192 | /* |
193 | * Possible ways to approx. divide by 10 | |
194 | * gcc -O2 replaces multiply with shifts and adds | |
195 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
196 | * (x * 0x67) >> 10: 1100111 | |
197 | * (x * 0x34) >> 9: 110100 - same | |
198 | * (x * 0x1a) >> 8: 11010 - same | |
199 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
200 | */ | |
4277eedd DV |
201 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
202 | q = (d0 * 0xcd) >> 11; | |
203 | d0 = d0 - 10*q; | |
204 | *buf++ = d0 + '0'; | |
205 | d1 = q + 9*d3 + 5*d2 + d1; | |
206 | q = (d1 * 0xcd) >> 11; | |
207 | d1 = d1 - 10*q; | |
208 | *buf++ = d1 + '0'; | |
209 | ||
210 | d2 = q + 2*d2; | |
211 | q = (d2 * 0xd) >> 7; | |
212 | d2 = d2 - 10*q; | |
213 | *buf++ = d2 + '0'; | |
214 | ||
215 | d3 = q + 4*d3; | |
216 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
217 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
218 | d3 = d3 - 10*q; | |
219 | *buf++ = d3 + '0'; | |
220 | *buf++ = q + '0'; | |
7b9186f5 | 221 | |
4277eedd DV |
222 | return buf; |
223 | } | |
224 | /* No inlining helps gcc to use registers better */ | |
cf3b429b JP |
225 | static noinline_for_stack |
226 | char *put_dec(char *buf, unsigned long long num) | |
4277eedd DV |
227 | { |
228 | while (1) { | |
229 | unsigned rem; | |
230 | if (num < 100000) | |
231 | return put_dec_trunc(buf, num); | |
232 | rem = do_div(num, 100000); | |
233 | buf = put_dec_full(buf, rem); | |
234 | } | |
235 | } | |
236 | ||
1da177e4 LT |
237 | #define ZEROPAD 1 /* pad with zero */ |
238 | #define SIGN 2 /* unsigned/signed long */ | |
239 | #define PLUS 4 /* show plus */ | |
240 | #define SPACE 8 /* space if plus */ | |
241 | #define LEFT 16 /* left justified */ | |
b89dc5d6 BH |
242 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
243 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ | |
1da177e4 | 244 | |
fef20d9c FW |
245 | enum format_type { |
246 | FORMAT_TYPE_NONE, /* Just a string part */ | |
ed681a91 | 247 | FORMAT_TYPE_WIDTH, |
fef20d9c FW |
248 | FORMAT_TYPE_PRECISION, |
249 | FORMAT_TYPE_CHAR, | |
250 | FORMAT_TYPE_STR, | |
251 | FORMAT_TYPE_PTR, | |
252 | FORMAT_TYPE_PERCENT_CHAR, | |
253 | FORMAT_TYPE_INVALID, | |
254 | FORMAT_TYPE_LONG_LONG, | |
255 | FORMAT_TYPE_ULONG, | |
256 | FORMAT_TYPE_LONG, | |
a4e94ef0 Z |
257 | FORMAT_TYPE_UBYTE, |
258 | FORMAT_TYPE_BYTE, | |
fef20d9c FW |
259 | FORMAT_TYPE_USHORT, |
260 | FORMAT_TYPE_SHORT, | |
261 | FORMAT_TYPE_UINT, | |
262 | FORMAT_TYPE_INT, | |
263 | FORMAT_TYPE_NRCHARS, | |
264 | FORMAT_TYPE_SIZE_T, | |
265 | FORMAT_TYPE_PTRDIFF | |
266 | }; | |
267 | ||
268 | struct printf_spec { | |
4e310fda | 269 | u8 type; /* format_type enum */ |
ef0658f3 | 270 | u8 flags; /* flags to number() */ |
4e310fda JP |
271 | u8 base; /* number base, 8, 10 or 16 only */ |
272 | u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ | |
273 | s16 field_width; /* width of output field */ | |
274 | s16 precision; /* # of digits/chars */ | |
fef20d9c FW |
275 | }; |
276 | ||
cf3b429b JP |
277 | static noinline_for_stack |
278 | char *number(char *buf, char *end, unsigned long long num, | |
279 | struct printf_spec spec) | |
1da177e4 | 280 | { |
9b706aee DV |
281 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
282 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ | |
283 | ||
284 | char tmp[66]; | |
285 | char sign; | |
286 | char locase; | |
fef20d9c | 287 | int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
1da177e4 LT |
288 | int i; |
289 | ||
9b706aee DV |
290 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
291 | * produces same digits or (maybe lowercased) letters */ | |
fef20d9c FW |
292 | locase = (spec.flags & SMALL); |
293 | if (spec.flags & LEFT) | |
294 | spec.flags &= ~ZEROPAD; | |
1da177e4 | 295 | sign = 0; |
fef20d9c | 296 | if (spec.flags & SIGN) { |
7b9186f5 | 297 | if ((signed long long)num < 0) { |
1da177e4 | 298 | sign = '-'; |
7b9186f5 | 299 | num = -(signed long long)num; |
fef20d9c FW |
300 | spec.field_width--; |
301 | } else if (spec.flags & PLUS) { | |
1da177e4 | 302 | sign = '+'; |
fef20d9c FW |
303 | spec.field_width--; |
304 | } else if (spec.flags & SPACE) { | |
1da177e4 | 305 | sign = ' '; |
fef20d9c | 306 | spec.field_width--; |
1da177e4 LT |
307 | } |
308 | } | |
b39a7340 | 309 | if (need_pfx) { |
fef20d9c FW |
310 | spec.field_width--; |
311 | if (spec.base == 16) | |
312 | spec.field_width--; | |
1da177e4 | 313 | } |
b39a7340 DV |
314 | |
315 | /* generate full string in tmp[], in reverse order */ | |
1da177e4 LT |
316 | i = 0; |
317 | if (num == 0) | |
b39a7340 | 318 | tmp[i++] = '0'; |
4277eedd DV |
319 | /* Generic code, for any base: |
320 | else do { | |
9b706aee | 321 | tmp[i++] = (digits[do_div(num,base)] | locase); |
4277eedd DV |
322 | } while (num != 0); |
323 | */ | |
fef20d9c FW |
324 | else if (spec.base != 10) { /* 8 or 16 */ |
325 | int mask = spec.base - 1; | |
b39a7340 | 326 | int shift = 3; |
7b9186f5 AGR |
327 | |
328 | if (spec.base == 16) | |
329 | shift = 4; | |
b39a7340 | 330 | do { |
9b706aee | 331 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
b39a7340 DV |
332 | num >>= shift; |
333 | } while (num); | |
4277eedd DV |
334 | } else { /* base 10 */ |
335 | i = put_dec(tmp, num) - tmp; | |
336 | } | |
b39a7340 DV |
337 | |
338 | /* printing 100 using %2d gives "100", not "00" */ | |
fef20d9c FW |
339 | if (i > spec.precision) |
340 | spec.precision = i; | |
b39a7340 | 341 | /* leading space padding */ |
fef20d9c FW |
342 | spec.field_width -= spec.precision; |
343 | if (!(spec.flags & (ZEROPAD+LEFT))) { | |
7b9186f5 | 344 | while (--spec.field_width >= 0) { |
f796937a | 345 | if (buf < end) |
1da177e4 LT |
346 | *buf = ' '; |
347 | ++buf; | |
348 | } | |
349 | } | |
b39a7340 | 350 | /* sign */ |
1da177e4 | 351 | if (sign) { |
f796937a | 352 | if (buf < end) |
1da177e4 LT |
353 | *buf = sign; |
354 | ++buf; | |
355 | } | |
b39a7340 DV |
356 | /* "0x" / "0" prefix */ |
357 | if (need_pfx) { | |
358 | if (buf < end) | |
359 | *buf = '0'; | |
360 | ++buf; | |
fef20d9c | 361 | if (spec.base == 16) { |
f796937a | 362 | if (buf < end) |
9b706aee | 363 | *buf = ('X' | locase); |
1da177e4 LT |
364 | ++buf; |
365 | } | |
366 | } | |
b39a7340 | 367 | /* zero or space padding */ |
fef20d9c FW |
368 | if (!(spec.flags & LEFT)) { |
369 | char c = (spec.flags & ZEROPAD) ? '0' : ' '; | |
370 | while (--spec.field_width >= 0) { | |
f796937a | 371 | if (buf < end) |
1da177e4 LT |
372 | *buf = c; |
373 | ++buf; | |
374 | } | |
375 | } | |
b39a7340 | 376 | /* hmm even more zero padding? */ |
fef20d9c | 377 | while (i <= --spec.precision) { |
f796937a | 378 | if (buf < end) |
1da177e4 LT |
379 | *buf = '0'; |
380 | ++buf; | |
381 | } | |
b39a7340 DV |
382 | /* actual digits of result */ |
383 | while (--i >= 0) { | |
f796937a | 384 | if (buf < end) |
1da177e4 LT |
385 | *buf = tmp[i]; |
386 | ++buf; | |
387 | } | |
b39a7340 | 388 | /* trailing space padding */ |
fef20d9c | 389 | while (--spec.field_width >= 0) { |
f796937a | 390 | if (buf < end) |
1da177e4 LT |
391 | *buf = ' '; |
392 | ++buf; | |
393 | } | |
7b9186f5 | 394 | |
1da177e4 LT |
395 | return buf; |
396 | } | |
397 | ||
cf3b429b JP |
398 | static noinline_for_stack |
399 | char *string(char *buf, char *end, const char *s, struct printf_spec spec) | |
0f9bfa56 LT |
400 | { |
401 | int len, i; | |
402 | ||
403 | if ((unsigned long)s < PAGE_SIZE) | |
0f4f81dc | 404 | s = "(null)"; |
0f9bfa56 | 405 | |
fef20d9c | 406 | len = strnlen(s, spec.precision); |
0f9bfa56 | 407 | |
fef20d9c FW |
408 | if (!(spec.flags & LEFT)) { |
409 | while (len < spec.field_width--) { | |
0f9bfa56 LT |
410 | if (buf < end) |
411 | *buf = ' '; | |
412 | ++buf; | |
413 | } | |
414 | } | |
415 | for (i = 0; i < len; ++i) { | |
416 | if (buf < end) | |
417 | *buf = *s; | |
418 | ++buf; ++s; | |
419 | } | |
fef20d9c | 420 | while (len < spec.field_width--) { |
0f9bfa56 LT |
421 | if (buf < end) |
422 | *buf = ' '; | |
423 | ++buf; | |
424 | } | |
7b9186f5 | 425 | |
0f9bfa56 LT |
426 | return buf; |
427 | } | |
428 | ||
cf3b429b JP |
429 | static noinline_for_stack |
430 | char *symbol_string(char *buf, char *end, void *ptr, | |
431 | struct printf_spec spec, char ext) | |
0fe1ef24 LT |
432 | { |
433 | unsigned long value = (unsigned long) ptr; | |
434 | #ifdef CONFIG_KALLSYMS | |
435 | char sym[KSYM_SYMBOL_LEN]; | |
0f77a8d3 NK |
436 | if (ext == 'B') |
437 | sprint_backtrace(sym, value); | |
438 | else if (ext != 'f' && ext != 's') | |
0c8b946e FW |
439 | sprint_symbol(sym, value); |
440 | else | |
441 | kallsyms_lookup(value, NULL, NULL, NULL, sym); | |
7b9186f5 | 442 | |
fef20d9c | 443 | return string(buf, end, sym, spec); |
0fe1ef24 | 444 | #else |
7b9186f5 | 445 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
446 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
447 | spec.base = 16; | |
7b9186f5 | 448 | |
fef20d9c | 449 | return number(buf, end, value, spec); |
0fe1ef24 LT |
450 | #endif |
451 | } | |
452 | ||
cf3b429b JP |
453 | static noinline_for_stack |
454 | char *resource_string(char *buf, char *end, struct resource *res, | |
455 | struct printf_spec spec, const char *fmt) | |
332d2e78 LT |
456 | { |
457 | #ifndef IO_RSRC_PRINTK_SIZE | |
28405372 | 458 | #define IO_RSRC_PRINTK_SIZE 6 |
332d2e78 LT |
459 | #endif |
460 | ||
461 | #ifndef MEM_RSRC_PRINTK_SIZE | |
28405372 | 462 | #define MEM_RSRC_PRINTK_SIZE 10 |
332d2e78 | 463 | #endif |
4da0b66c | 464 | static const struct printf_spec io_spec = { |
fef20d9c | 465 | .base = 16, |
4da0b66c | 466 | .field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c FW |
467 | .precision = -1, |
468 | .flags = SPECIAL | SMALL | ZEROPAD, | |
469 | }; | |
4da0b66c BH |
470 | static const struct printf_spec mem_spec = { |
471 | .base = 16, | |
472 | .field_width = MEM_RSRC_PRINTK_SIZE, | |
473 | .precision = -1, | |
474 | .flags = SPECIAL | SMALL | ZEROPAD, | |
475 | }; | |
0f4050c7 BH |
476 | static const struct printf_spec bus_spec = { |
477 | .base = 16, | |
478 | .field_width = 2, | |
479 | .precision = -1, | |
480 | .flags = SMALL | ZEROPAD, | |
481 | }; | |
4da0b66c | 482 | static const struct printf_spec dec_spec = { |
c91d3376 BH |
483 | .base = 10, |
484 | .precision = -1, | |
485 | .flags = 0, | |
486 | }; | |
4da0b66c | 487 | static const struct printf_spec str_spec = { |
fd95541e BH |
488 | .field_width = -1, |
489 | .precision = 10, | |
490 | .flags = LEFT, | |
491 | }; | |
4da0b66c | 492 | static const struct printf_spec flag_spec = { |
fd95541e BH |
493 | .base = 16, |
494 | .precision = -1, | |
495 | .flags = SPECIAL | SMALL, | |
496 | }; | |
c7dabef8 BH |
497 | |
498 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
499 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
500 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
501 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
9d7cca04 | 502 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
c7dabef8 BH |
503 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
504 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
505 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
506 | ||
332d2e78 | 507 | char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8 | 508 | int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c | 509 | const struct printf_spec *specp; |
332d2e78 LT |
510 | |
511 | *p++ = '['; | |
4da0b66c | 512 | if (res->flags & IORESOURCE_IO) { |
c7dabef8 | 513 | p = string(p, pend, "io ", str_spec); |
4da0b66c BH |
514 | specp = &io_spec; |
515 | } else if (res->flags & IORESOURCE_MEM) { | |
c7dabef8 | 516 | p = string(p, pend, "mem ", str_spec); |
4da0b66c BH |
517 | specp = &mem_spec; |
518 | } else if (res->flags & IORESOURCE_IRQ) { | |
c7dabef8 | 519 | p = string(p, pend, "irq ", str_spec); |
4da0b66c BH |
520 | specp = &dec_spec; |
521 | } else if (res->flags & IORESOURCE_DMA) { | |
c7dabef8 | 522 | p = string(p, pend, "dma ", str_spec); |
4da0b66c | 523 | specp = &dec_spec; |
0f4050c7 BH |
524 | } else if (res->flags & IORESOURCE_BUS) { |
525 | p = string(p, pend, "bus ", str_spec); | |
526 | specp = &bus_spec; | |
4da0b66c | 527 | } else { |
c7dabef8 | 528 | p = string(p, pend, "??? ", str_spec); |
4da0b66c | 529 | specp = &mem_spec; |
c7dabef8 | 530 | decode = 0; |
fd95541e | 531 | } |
4da0b66c | 532 | p = number(p, pend, res->start, *specp); |
c91d3376 BH |
533 | if (res->start != res->end) { |
534 | *p++ = '-'; | |
4da0b66c | 535 | p = number(p, pend, res->end, *specp); |
c91d3376 | 536 | } |
c7dabef8 | 537 | if (decode) { |
fd95541e BH |
538 | if (res->flags & IORESOURCE_MEM_64) |
539 | p = string(p, pend, " 64bit", str_spec); | |
540 | if (res->flags & IORESOURCE_PREFETCH) | |
541 | p = string(p, pend, " pref", str_spec); | |
9d7cca04 BH |
542 | if (res->flags & IORESOURCE_WINDOW) |
543 | p = string(p, pend, " window", str_spec); | |
fd95541e BH |
544 | if (res->flags & IORESOURCE_DISABLED) |
545 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
546 | } else { |
547 | p = string(p, pend, " flags ", str_spec); | |
548 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 549 | } |
332d2e78 | 550 | *p++ = ']'; |
c7dabef8 | 551 | *p = '\0'; |
332d2e78 | 552 | |
fef20d9c | 553 | return string(buf, end, sym, spec); |
332d2e78 LT |
554 | } |
555 | ||
cf3b429b JP |
556 | static noinline_for_stack |
557 | char *mac_address_string(char *buf, char *end, u8 *addr, | |
558 | struct printf_spec spec, const char *fmt) | |
dd45c9cf | 559 | { |
8a27f7c9 | 560 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
561 | char *p = mac_addr; |
562 | int i; | |
bc7259a2 JP |
563 | char separator; |
564 | ||
565 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
566 | separator = '-'; |
567 | } else { | |
bc7259a2 JP |
568 | separator = ':'; |
569 | } | |
dd45c9cf HH |
570 | |
571 | for (i = 0; i < 6; i++) { | |
c8e00060 | 572 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 573 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 574 | *p++ = separator; |
dd45c9cf HH |
575 | } |
576 | *p = '\0'; | |
577 | ||
fef20d9c | 578 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
579 | } |
580 | ||
cf3b429b JP |
581 | static noinline_for_stack |
582 | char *ip4_string(char *p, const u8 *addr, const char *fmt) | |
8a27f7c9 JP |
583 | { |
584 | int i; | |
0159f24e JP |
585 | bool leading_zeros = (fmt[0] == 'i'); |
586 | int index; | |
587 | int step; | |
588 | ||
589 | switch (fmt[2]) { | |
590 | case 'h': | |
591 | #ifdef __BIG_ENDIAN | |
592 | index = 0; | |
593 | step = 1; | |
594 | #else | |
595 | index = 3; | |
596 | step = -1; | |
597 | #endif | |
598 | break; | |
599 | case 'l': | |
600 | index = 3; | |
601 | step = -1; | |
602 | break; | |
603 | case 'n': | |
604 | case 'b': | |
605 | default: | |
606 | index = 0; | |
607 | step = 1; | |
608 | break; | |
609 | } | |
8a27f7c9 JP |
610 | for (i = 0; i < 4; i++) { |
611 | char temp[3]; /* hold each IP quad in reverse order */ | |
0159f24e | 612 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c9 JP |
613 | if (leading_zeros) { |
614 | if (digits < 3) | |
615 | *p++ = '0'; | |
616 | if (digits < 2) | |
617 | *p++ = '0'; | |
618 | } | |
619 | /* reverse the digits in the quad */ | |
620 | while (digits--) | |
621 | *p++ = temp[digits]; | |
622 | if (i < 3) | |
623 | *p++ = '.'; | |
0159f24e | 624 | index += step; |
8a27f7c9 | 625 | } |
8a27f7c9 | 626 | *p = '\0'; |
7b9186f5 | 627 | |
8a27f7c9 JP |
628 | return p; |
629 | } | |
630 | ||
cf3b429b JP |
631 | static noinline_for_stack |
632 | char *ip6_compressed_string(char *p, const char *addr) | |
689afa7d | 633 | { |
7b9186f5 | 634 | int i, j, range; |
8a27f7c9 JP |
635 | unsigned char zerolength[8]; |
636 | int longest = 1; | |
637 | int colonpos = -1; | |
638 | u16 word; | |
7b9186f5 | 639 | u8 hi, lo; |
8a27f7c9 | 640 | bool needcolon = false; |
eb78cd26 JP |
641 | bool useIPv4; |
642 | struct in6_addr in6; | |
643 | ||
644 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
645 | ||
646 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
647 | |
648 | memset(zerolength, 0, sizeof(zerolength)); | |
649 | ||
650 | if (useIPv4) | |
651 | range = 6; | |
652 | else | |
653 | range = 8; | |
654 | ||
655 | /* find position of longest 0 run */ | |
656 | for (i = 0; i < range; i++) { | |
657 | for (j = i; j < range; j++) { | |
eb78cd26 | 658 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
659 | break; |
660 | zerolength[i]++; | |
661 | } | |
662 | } | |
663 | for (i = 0; i < range; i++) { | |
664 | if (zerolength[i] > longest) { | |
665 | longest = zerolength[i]; | |
666 | colonpos = i; | |
667 | } | |
668 | } | |
689afa7d | 669 | |
8a27f7c9 JP |
670 | /* emit address */ |
671 | for (i = 0; i < range; i++) { | |
672 | if (i == colonpos) { | |
673 | if (needcolon || i == 0) | |
674 | *p++ = ':'; | |
675 | *p++ = ':'; | |
676 | needcolon = false; | |
677 | i += longest - 1; | |
678 | continue; | |
679 | } | |
680 | if (needcolon) { | |
681 | *p++ = ':'; | |
682 | needcolon = false; | |
683 | } | |
684 | /* hex u16 without leading 0s */ | |
eb78cd26 | 685 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
686 | hi = word >> 8; |
687 | lo = word & 0xff; | |
688 | if (hi) { | |
689 | if (hi > 0x0f) | |
690 | p = pack_hex_byte(p, hi); | |
691 | else | |
692 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 693 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 694 | } |
b5ff992b | 695 | else if (lo > 0x0f) |
8a27f7c9 JP |
696 | p = pack_hex_byte(p, lo); |
697 | else | |
698 | *p++ = hex_asc_lo(lo); | |
699 | needcolon = true; | |
700 | } | |
701 | ||
702 | if (useIPv4) { | |
703 | if (needcolon) | |
704 | *p++ = ':'; | |
0159f24e | 705 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c9 | 706 | } |
8a27f7c9 | 707 | *p = '\0'; |
7b9186f5 | 708 | |
8a27f7c9 JP |
709 | return p; |
710 | } | |
711 | ||
cf3b429b JP |
712 | static noinline_for_stack |
713 | char *ip6_string(char *p, const char *addr, const char *fmt) | |
8a27f7c9 JP |
714 | { |
715 | int i; | |
7b9186f5 | 716 | |
689afa7d | 717 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
718 | p = pack_hex_byte(p, *addr++); |
719 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 720 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
721 | *p++ = ':'; |
722 | } | |
723 | *p = '\0'; | |
7b9186f5 | 724 | |
8a27f7c9 JP |
725 | return p; |
726 | } | |
727 | ||
cf3b429b JP |
728 | static noinline_for_stack |
729 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
730 | struct printf_spec spec, const char *fmt) | |
8a27f7c9 JP |
731 | { |
732 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
733 | ||
734 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 735 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 736 | else |
eb78cd26 | 737 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 738 | |
fef20d9c | 739 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
740 | } |
741 | ||
cf3b429b JP |
742 | static noinline_for_stack |
743 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, | |
744 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 745 | { |
8a27f7c9 | 746 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 747 | |
0159f24e | 748 | ip4_string(ip4_addr, addr, fmt); |
4aa99606 | 749 | |
fef20d9c | 750 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
751 | } |
752 | ||
cf3b429b JP |
753 | static noinline_for_stack |
754 | char *uuid_string(char *buf, char *end, const u8 *addr, | |
755 | struct printf_spec spec, const char *fmt) | |
9ac6e44e JP |
756 | { |
757 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
758 | char *p = uuid; | |
759 | int i; | |
760 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
761 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
762 | const u8 *index = be; | |
763 | bool uc = false; | |
764 | ||
765 | switch (*(++fmt)) { | |
766 | case 'L': | |
767 | uc = true; /* fall-through */ | |
768 | case 'l': | |
769 | index = le; | |
770 | break; | |
771 | case 'B': | |
772 | uc = true; | |
773 | break; | |
774 | } | |
775 | ||
776 | for (i = 0; i < 16; i++) { | |
777 | p = pack_hex_byte(p, addr[index[i]]); | |
778 | switch (i) { | |
779 | case 3: | |
780 | case 5: | |
781 | case 7: | |
782 | case 9: | |
783 | *p++ = '-'; | |
784 | break; | |
785 | } | |
786 | } | |
787 | ||
788 | *p = 0; | |
789 | ||
790 | if (uc) { | |
791 | p = uuid; | |
792 | do { | |
793 | *p = toupper(*p); | |
794 | } while (*(++p)); | |
795 | } | |
796 | ||
797 | return string(buf, end, uuid, spec); | |
798 | } | |
799 | ||
411f05f1 | 800 | int kptr_restrict __read_mostly; |
455cd5ab | 801 | |
4d8a743c LT |
802 | /* |
803 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
804 | * by an extra set of alphanumeric characters that are extended format | |
805 | * specifiers. | |
806 | * | |
332d2e78 LT |
807 | * Right now we handle: |
808 | * | |
0c8b946e FW |
809 | * - 'F' For symbolic function descriptor pointers with offset |
810 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
811 | * - 'S' For symbolic direct pointers with offset |
812 | * - 's' For symbolic direct pointers without offset | |
0f77a8d3 | 813 | * - 'B' For backtraced symbolic direct pointers with offset |
c7dabef8 BH |
814 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
815 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
816 | * - 'M' For a 6-byte MAC address, it prints the address in the |
817 | * usual colon-separated hex notation | |
8a27f7c9 | 818 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 819 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 820 | * with a dash-separated hex notation |
8a27f7c9 JP |
821 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
822 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
823 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
824 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
825 | * IPv6 omits the colons (01020304...0f) | |
826 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
0159f24e | 827 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c9 | 828 | * - 'I6c' for IPv6 addresses printed as specified by |
3f472402 | 829 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
9ac6e44e JP |
830 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
831 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
832 | * Options for %pU are: | |
833 | * b big endian lower case hex (default) | |
834 | * B big endian UPPER case hex | |
835 | * l little endian lower case hex | |
836 | * L little endian UPPER case hex | |
837 | * big endian output byte order is: | |
838 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
839 | * little endian output byte order is: | |
840 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
7db6f5fb JP |
841 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
842 | * call vsnprintf(->format, *->va_list). | |
843 | * Implements a "recursive vsnprintf". | |
844 | * Do not use this feature without some mechanism to verify the | |
845 | * correctness of the format string and va_list arguments. | |
455cd5ab | 846 | * - 'K' For a kernel pointer that should be hidden from unprivileged users |
9ac6e44e | 847 | * |
332d2e78 LT |
848 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
849 | * function pointers are really function descriptors, which contain a | |
850 | * pointer to the real address. | |
4d8a743c | 851 | */ |
cf3b429b JP |
852 | static noinline_for_stack |
853 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, | |
854 | struct printf_spec spec) | |
78a8bf69 | 855 | { |
9f36e2c4 | 856 | if (!ptr && *fmt != 'K') { |
5e057981 JP |
857 | /* |
858 | * Print (null) with the same width as a pointer so it makes | |
859 | * tabular output look nice. | |
860 | */ | |
861 | if (spec.field_width == -1) | |
862 | spec.field_width = 2 * sizeof(void *); | |
fef20d9c | 863 | return string(buf, end, "(null)", spec); |
5e057981 | 864 | } |
d97106ab | 865 | |
0fe1ef24 LT |
866 | switch (*fmt) { |
867 | case 'F': | |
0c8b946e | 868 | case 'f': |
0fe1ef24 LT |
869 | ptr = dereference_function_descriptor(ptr); |
870 | /* Fallthrough */ | |
871 | case 'S': | |
9ac6e44e | 872 | case 's': |
0f77a8d3 | 873 | case 'B': |
0c8b946e | 874 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 875 | case 'R': |
c7dabef8 | 876 | case 'r': |
fd95541e | 877 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
878 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
879 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 880 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
881 | return mac_address_string(buf, end, ptr, spec, fmt); |
882 | case 'I': /* Formatted IP supported | |
883 | * 4: 1.2.3.4 | |
884 | * 6: 0001:0203:...:0708 | |
885 | * 6c: 1::708 or 1::1.2.3.4 | |
886 | */ | |
887 | case 'i': /* Contiguous: | |
888 | * 4: 001.002.003.004 | |
889 | * 6: 000102...0f | |
890 | */ | |
891 | switch (fmt[1]) { | |
892 | case '6': | |
893 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
894 | case '4': | |
895 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
896 | } | |
fef20d9c | 897 | break; |
9ac6e44e JP |
898 | case 'U': |
899 | return uuid_string(buf, end, ptr, spec, fmt); | |
7db6f5fb | 900 | case 'V': |
d9be9b90 | 901 | return buf + vsnprintf(buf, end > buf ? end - buf : 0, |
7db6f5fb JP |
902 | ((struct va_format *)ptr)->fmt, |
903 | *(((struct va_format *)ptr)->va)); | |
455cd5ab DR |
904 | case 'K': |
905 | /* | |
906 | * %pK cannot be used in IRQ context because its test | |
907 | * for CAP_SYSLOG would be meaningless. | |
908 | */ | |
909 | if (in_irq() || in_serving_softirq() || in_nmi()) { | |
910 | if (spec.field_width == -1) | |
911 | spec.field_width = 2 * sizeof(void *); | |
912 | return string(buf, end, "pK-error", spec); | |
455cd5ab | 913 | } |
26297607 JP |
914 | if (!((kptr_restrict == 0) || |
915 | (kptr_restrict == 1 && | |
916 | has_capability_noaudit(current, CAP_SYSLOG)))) | |
917 | ptr = NULL; | |
918 | break; | |
fef20d9c FW |
919 | } |
920 | spec.flags |= SMALL; | |
921 | if (spec.field_width == -1) { | |
5e057981 | 922 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
923 | spec.flags |= ZEROPAD; |
924 | } | |
925 | spec.base = 16; | |
926 | ||
927 | return number(buf, end, (unsigned long) ptr, spec); | |
928 | } | |
929 | ||
930 | /* | |
931 | * Helper function to decode printf style format. | |
932 | * Each call decode a token from the format and return the | |
933 | * number of characters read (or likely the delta where it wants | |
934 | * to go on the next call). | |
935 | * The decoded token is returned through the parameters | |
936 | * | |
937 | * 'h', 'l', or 'L' for integer fields | |
938 | * 'z' support added 23/7/1999 S.H. | |
939 | * 'z' changed to 'Z' --davidm 1/25/99 | |
940 | * 't' added for ptrdiff_t | |
941 | * | |
942 | * @fmt: the format string | |
943 | * @type of the token returned | |
944 | * @flags: various flags such as +, -, # tokens.. | |
945 | * @field_width: overwritten width | |
946 | * @base: base of the number (octal, hex, ...) | |
947 | * @precision: precision of a number | |
948 | * @qualifier: qualifier of a number (long, size_t, ...) | |
949 | */ | |
cf3b429b JP |
950 | static noinline_for_stack |
951 | int format_decode(const char *fmt, struct printf_spec *spec) | |
fef20d9c FW |
952 | { |
953 | const char *start = fmt; | |
fef20d9c FW |
954 | |
955 | /* we finished early by reading the field width */ | |
ed681a91 | 956 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
957 | if (spec->field_width < 0) { |
958 | spec->field_width = -spec->field_width; | |
959 | spec->flags |= LEFT; | |
960 | } | |
961 | spec->type = FORMAT_TYPE_NONE; | |
962 | goto precision; | |
963 | } | |
964 | ||
965 | /* we finished early by reading the precision */ | |
966 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
967 | if (spec->precision < 0) | |
968 | spec->precision = 0; | |
969 | ||
970 | spec->type = FORMAT_TYPE_NONE; | |
971 | goto qualifier; | |
972 | } | |
973 | ||
974 | /* By default */ | |
975 | spec->type = FORMAT_TYPE_NONE; | |
976 | ||
977 | for (; *fmt ; ++fmt) { | |
978 | if (*fmt == '%') | |
979 | break; | |
980 | } | |
981 | ||
982 | /* Return the current non-format string */ | |
983 | if (fmt != start || !*fmt) | |
984 | return fmt - start; | |
985 | ||
986 | /* Process flags */ | |
987 | spec->flags = 0; | |
988 | ||
989 | while (1) { /* this also skips first '%' */ | |
990 | bool found = true; | |
991 | ||
992 | ++fmt; | |
993 | ||
994 | switch (*fmt) { | |
995 | case '-': spec->flags |= LEFT; break; | |
996 | case '+': spec->flags |= PLUS; break; | |
997 | case ' ': spec->flags |= SPACE; break; | |
998 | case '#': spec->flags |= SPECIAL; break; | |
999 | case '0': spec->flags |= ZEROPAD; break; | |
1000 | default: found = false; | |
1001 | } | |
1002 | ||
1003 | if (!found) | |
1004 | break; | |
1005 | } | |
1006 | ||
1007 | /* get field width */ | |
1008 | spec->field_width = -1; | |
1009 | ||
1010 | if (isdigit(*fmt)) | |
1011 | spec->field_width = skip_atoi(&fmt); | |
1012 | else if (*fmt == '*') { | |
1013 | /* it's the next argument */ | |
ed681a91 | 1014 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1015 | return ++fmt - start; |
1016 | } | |
1017 | ||
1018 | precision: | |
1019 | /* get the precision */ | |
1020 | spec->precision = -1; | |
1021 | if (*fmt == '.') { | |
1022 | ++fmt; | |
1023 | if (isdigit(*fmt)) { | |
1024 | spec->precision = skip_atoi(&fmt); | |
1025 | if (spec->precision < 0) | |
1026 | spec->precision = 0; | |
1027 | } else if (*fmt == '*') { | |
1028 | /* it's the next argument */ | |
adf26f84 | 1029 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1030 | return ++fmt - start; |
1031 | } | |
1032 | } | |
1033 | ||
1034 | qualifier: | |
1035 | /* get the conversion qualifier */ | |
1036 | spec->qualifier = -1; | |
08562cb2 AGR |
1037 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1038 | TOLOWER(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1039 | spec->qualifier = *fmt++; |
1040 | if (unlikely(spec->qualifier == *fmt)) { | |
1041 | if (spec->qualifier == 'l') { | |
1042 | spec->qualifier = 'L'; | |
1043 | ++fmt; | |
1044 | } else if (spec->qualifier == 'h') { | |
1045 | spec->qualifier = 'H'; | |
1046 | ++fmt; | |
1047 | } | |
fef20d9c FW |
1048 | } |
1049 | } | |
1050 | ||
1051 | /* default base */ | |
1052 | spec->base = 10; | |
1053 | switch (*fmt) { | |
1054 | case 'c': | |
1055 | spec->type = FORMAT_TYPE_CHAR; | |
1056 | return ++fmt - start; | |
1057 | ||
1058 | case 's': | |
1059 | spec->type = FORMAT_TYPE_STR; | |
1060 | return ++fmt - start; | |
1061 | ||
1062 | case 'p': | |
1063 | spec->type = FORMAT_TYPE_PTR; | |
1064 | return fmt - start; | |
1065 | /* skip alnum */ | |
1066 | ||
1067 | case 'n': | |
1068 | spec->type = FORMAT_TYPE_NRCHARS; | |
1069 | return ++fmt - start; | |
1070 | ||
1071 | case '%': | |
1072 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1073 | return ++fmt - start; | |
1074 | ||
1075 | /* integer number formats - set up the flags and "break" */ | |
1076 | case 'o': | |
1077 | spec->base = 8; | |
1078 | break; | |
1079 | ||
1080 | case 'x': | |
1081 | spec->flags |= SMALL; | |
1082 | ||
1083 | case 'X': | |
1084 | spec->base = 16; | |
1085 | break; | |
1086 | ||
1087 | case 'd': | |
1088 | case 'i': | |
39e874f8 | 1089 | spec->flags |= SIGN; |
fef20d9c | 1090 | case 'u': |
4aa99606 | 1091 | break; |
fef20d9c FW |
1092 | |
1093 | default: | |
1094 | spec->type = FORMAT_TYPE_INVALID; | |
1095 | return fmt - start; | |
0fe1ef24 | 1096 | } |
fef20d9c FW |
1097 | |
1098 | if (spec->qualifier == 'L') | |
1099 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1100 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1101 | if (spec->flags & SIGN) |
fef20d9c FW |
1102 | spec->type = FORMAT_TYPE_LONG; |
1103 | else | |
1104 | spec->type = FORMAT_TYPE_ULONG; | |
08562cb2 | 1105 | } else if (TOLOWER(spec->qualifier) == 'z') { |
fef20d9c FW |
1106 | spec->type = FORMAT_TYPE_SIZE_T; |
1107 | } else if (spec->qualifier == 't') { | |
1108 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1109 | } else if (spec->qualifier == 'H') { |
1110 | if (spec->flags & SIGN) | |
1111 | spec->type = FORMAT_TYPE_BYTE; | |
1112 | else | |
1113 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1114 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1115 | if (spec->flags & SIGN) |
fef20d9c FW |
1116 | spec->type = FORMAT_TYPE_SHORT; |
1117 | else | |
1118 | spec->type = FORMAT_TYPE_USHORT; | |
1119 | } else { | |
39e874f8 | 1120 | if (spec->flags & SIGN) |
fef20d9c FW |
1121 | spec->type = FORMAT_TYPE_INT; |
1122 | else | |
1123 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1124 | } |
fef20d9c FW |
1125 | |
1126 | return ++fmt - start; | |
78a8bf69 LT |
1127 | } |
1128 | ||
1da177e4 LT |
1129 | /** |
1130 | * vsnprintf - Format a string and place it in a buffer | |
1131 | * @buf: The buffer to place the result into | |
1132 | * @size: The size of the buffer, including the trailing null space | |
1133 | * @fmt: The format string to use | |
1134 | * @args: Arguments for the format string | |
1135 | * | |
20036fdc | 1136 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1137 | * %pS output the name of a text symbol with offset |
1138 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1139 | * %pF output the name of a function pointer with its offset |
1140 | * %pf output the name of a function pointer without its offset | |
0f77a8d3 | 1141 | * %pB output the name of a backtrace symbol with its offset |
8a79503a UKK |
1142 | * %pR output the address range in a struct resource with decoded flags |
1143 | * %pr output the address range in a struct resource with raw flags | |
1144 | * %pM output a 6-byte MAC address with colons | |
1145 | * %pm output a 6-byte MAC address without colons | |
1146 | * %pI4 print an IPv4 address without leading zeros | |
1147 | * %pi4 print an IPv4 address with leading zeros | |
1148 | * %pI6 print an IPv6 address with colons | |
1149 | * %pi6 print an IPv6 address without colons | |
1150 | * %pI6c print an IPv6 address as specified by | |
3f472402 | 1151 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
8a79503a UKK |
1152 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
1153 | * case. | |
0efb4d20 | 1154 | * %n is ignored |
20036fdc | 1155 | * |
1da177e4 LT |
1156 | * The return value is the number of characters which would |
1157 | * be generated for the given input, excluding the trailing | |
1158 | * '\0', as per ISO C99. If you want to have the exact | |
1159 | * number of characters written into @buf as return value | |
72fd4a35 | 1160 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1161 | * return is greater than or equal to @size, the resulting |
1162 | * string is truncated. | |
1163 | * | |
ba1835eb | 1164 | * If you're not already dealing with a va_list consider using snprintf(). |
1da177e4 LT |
1165 | */ |
1166 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1167 | { | |
1da177e4 | 1168 | unsigned long long num; |
d4be151b | 1169 | char *str, *end; |
fef20d9c | 1170 | struct printf_spec spec = {0}; |
1da177e4 | 1171 | |
f796937a JF |
1172 | /* Reject out-of-range values early. Large positive sizes are |
1173 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1174 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1175 | return 0; |
1da177e4 LT |
1176 | |
1177 | str = buf; | |
f796937a | 1178 | end = buf + size; |
1da177e4 | 1179 | |
f796937a JF |
1180 | /* Make sure end is always >= buf */ |
1181 | if (end < buf) { | |
1182 | end = ((void *)-1); | |
1183 | size = end - buf; | |
1da177e4 LT |
1184 | } |
1185 | ||
fef20d9c FW |
1186 | while (*fmt) { |
1187 | const char *old_fmt = fmt; | |
d4be151b | 1188 | int read = format_decode(fmt, &spec); |
1da177e4 | 1189 | |
fef20d9c | 1190 | fmt += read; |
1da177e4 | 1191 | |
fef20d9c FW |
1192 | switch (spec.type) { |
1193 | case FORMAT_TYPE_NONE: { | |
1194 | int copy = read; | |
1195 | if (str < end) { | |
1196 | if (copy > end - str) | |
1197 | copy = end - str; | |
1198 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1199 | } |
fef20d9c FW |
1200 | str += read; |
1201 | break; | |
1da177e4 LT |
1202 | } |
1203 | ||
ed681a91 | 1204 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1205 | spec.field_width = va_arg(args, int); |
1206 | break; | |
1da177e4 | 1207 | |
fef20d9c FW |
1208 | case FORMAT_TYPE_PRECISION: |
1209 | spec.precision = va_arg(args, int); | |
1210 | break; | |
1da177e4 | 1211 | |
d4be151b AGR |
1212 | case FORMAT_TYPE_CHAR: { |
1213 | char c; | |
1214 | ||
fef20d9c FW |
1215 | if (!(spec.flags & LEFT)) { |
1216 | while (--spec.field_width > 0) { | |
f796937a | 1217 | if (str < end) |
1da177e4 LT |
1218 | *str = ' '; |
1219 | ++str; | |
1da177e4 | 1220 | |
fef20d9c FW |
1221 | } |
1222 | } | |
1223 | c = (unsigned char) va_arg(args, int); | |
1224 | if (str < end) | |
1225 | *str = c; | |
1226 | ++str; | |
1227 | while (--spec.field_width > 0) { | |
f796937a | 1228 | if (str < end) |
fef20d9c | 1229 | *str = ' '; |
1da177e4 | 1230 | ++str; |
fef20d9c FW |
1231 | } |
1232 | break; | |
d4be151b | 1233 | } |
1da177e4 | 1234 | |
fef20d9c FW |
1235 | case FORMAT_TYPE_STR: |
1236 | str = string(str, end, va_arg(args, char *), spec); | |
1237 | break; | |
1da177e4 | 1238 | |
fef20d9c FW |
1239 | case FORMAT_TYPE_PTR: |
1240 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1241 | spec); | |
1242 | while (isalnum(*fmt)) | |
1243 | fmt++; | |
1244 | break; | |
1da177e4 | 1245 | |
fef20d9c FW |
1246 | case FORMAT_TYPE_PERCENT_CHAR: |
1247 | if (str < end) | |
1248 | *str = '%'; | |
1249 | ++str; | |
1250 | break; | |
1da177e4 | 1251 | |
fef20d9c FW |
1252 | case FORMAT_TYPE_INVALID: |
1253 | if (str < end) | |
1254 | *str = '%'; | |
1255 | ++str; | |
fef20d9c FW |
1256 | break; |
1257 | ||
1258 | case FORMAT_TYPE_NRCHARS: { | |
ef0658f3 | 1259 | u8 qualifier = spec.qualifier; |
fef20d9c FW |
1260 | |
1261 | if (qualifier == 'l') { | |
1262 | long *ip = va_arg(args, long *); | |
1263 | *ip = (str - buf); | |
08562cb2 | 1264 | } else if (TOLOWER(qualifier) == 'z') { |
fef20d9c FW |
1265 | size_t *ip = va_arg(args, size_t *); |
1266 | *ip = (str - buf); | |
1267 | } else { | |
1268 | int *ip = va_arg(args, int *); | |
1269 | *ip = (str - buf); | |
1270 | } | |
1271 | break; | |
1da177e4 | 1272 | } |
fef20d9c FW |
1273 | |
1274 | default: | |
1275 | switch (spec.type) { | |
1276 | case FORMAT_TYPE_LONG_LONG: | |
1277 | num = va_arg(args, long long); | |
1278 | break; | |
1279 | case FORMAT_TYPE_ULONG: | |
1280 | num = va_arg(args, unsigned long); | |
1281 | break; | |
1282 | case FORMAT_TYPE_LONG: | |
1283 | num = va_arg(args, long); | |
1284 | break; | |
1285 | case FORMAT_TYPE_SIZE_T: | |
1286 | num = va_arg(args, size_t); | |
1287 | break; | |
1288 | case FORMAT_TYPE_PTRDIFF: | |
1289 | num = va_arg(args, ptrdiff_t); | |
1290 | break; | |
a4e94ef0 Z |
1291 | case FORMAT_TYPE_UBYTE: |
1292 | num = (unsigned char) va_arg(args, int); | |
1293 | break; | |
1294 | case FORMAT_TYPE_BYTE: | |
1295 | num = (signed char) va_arg(args, int); | |
1296 | break; | |
fef20d9c FW |
1297 | case FORMAT_TYPE_USHORT: |
1298 | num = (unsigned short) va_arg(args, int); | |
1299 | break; | |
1300 | case FORMAT_TYPE_SHORT: | |
1301 | num = (short) va_arg(args, int); | |
1302 | break; | |
39e874f8 FW |
1303 | case FORMAT_TYPE_INT: |
1304 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1305 | break; |
1306 | default: | |
1307 | num = va_arg(args, unsigned int); | |
1308 | } | |
1309 | ||
1310 | str = number(str, end, num, spec); | |
1da177e4 | 1311 | } |
1da177e4 | 1312 | } |
fef20d9c | 1313 | |
f796937a JF |
1314 | if (size > 0) { |
1315 | if (str < end) | |
1316 | *str = '\0'; | |
1317 | else | |
0a6047ee | 1318 | end[-1] = '\0'; |
f796937a | 1319 | } |
fef20d9c | 1320 | |
f796937a | 1321 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1322 | return str-buf; |
fef20d9c | 1323 | |
1da177e4 | 1324 | } |
1da177e4 LT |
1325 | EXPORT_SYMBOL(vsnprintf); |
1326 | ||
1327 | /** | |
1328 | * vscnprintf - Format a string and place it in a buffer | |
1329 | * @buf: The buffer to place the result into | |
1330 | * @size: The size of the buffer, including the trailing null space | |
1331 | * @fmt: The format string to use | |
1332 | * @args: Arguments for the format string | |
1333 | * | |
1334 | * The return value is the number of characters which have been written into | |
b921c69f | 1335 | * the @buf not including the trailing '\0'. If @size is == 0 the function |
1da177e4 LT |
1336 | * returns 0. |
1337 | * | |
ba1835eb | 1338 | * If you're not already dealing with a va_list consider using scnprintf(). |
20036fdc AK |
1339 | * |
1340 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1341 | */ |
1342 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1343 | { | |
1344 | int i; | |
1345 | ||
7b9186f5 AGR |
1346 | i = vsnprintf(buf, size, fmt, args); |
1347 | ||
b921c69f AA |
1348 | if (likely(i < size)) |
1349 | return i; | |
1350 | if (size != 0) | |
1351 | return size - 1; | |
1352 | return 0; | |
1da177e4 | 1353 | } |
1da177e4 LT |
1354 | EXPORT_SYMBOL(vscnprintf); |
1355 | ||
1356 | /** | |
1357 | * snprintf - Format a string and place it in a buffer | |
1358 | * @buf: The buffer to place the result into | |
1359 | * @size: The size of the buffer, including the trailing null space | |
1360 | * @fmt: The format string to use | |
1361 | * @...: Arguments for the format string | |
1362 | * | |
1363 | * The return value is the number of characters which would be | |
1364 | * generated for the given input, excluding the trailing null, | |
1365 | * as per ISO C99. If the return is greater than or equal to | |
1366 | * @size, the resulting string is truncated. | |
20036fdc AK |
1367 | * |
1368 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1369 | */ |
7b9186f5 | 1370 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1371 | { |
1372 | va_list args; | |
1373 | int i; | |
1374 | ||
1375 | va_start(args, fmt); | |
7b9186f5 | 1376 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1377 | va_end(args); |
7b9186f5 | 1378 | |
1da177e4 LT |
1379 | return i; |
1380 | } | |
1da177e4 LT |
1381 | EXPORT_SYMBOL(snprintf); |
1382 | ||
1383 | /** | |
1384 | * scnprintf - Format a string and place it in a buffer | |
1385 | * @buf: The buffer to place the result into | |
1386 | * @size: The size of the buffer, including the trailing null space | |
1387 | * @fmt: The format string to use | |
1388 | * @...: Arguments for the format string | |
1389 | * | |
1390 | * The return value is the number of characters written into @buf not including | |
b903c0b8 | 1391 | * the trailing '\0'. If @size is == 0 the function returns 0. |
1da177e4 LT |
1392 | */ |
1393 | ||
7b9186f5 | 1394 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1395 | { |
1396 | va_list args; | |
1397 | int i; | |
1398 | ||
1399 | va_start(args, fmt); | |
b921c69f | 1400 | i = vscnprintf(buf, size, fmt, args); |
1da177e4 | 1401 | va_end(args); |
7b9186f5 | 1402 | |
b921c69f | 1403 | return i; |
1da177e4 LT |
1404 | } |
1405 | EXPORT_SYMBOL(scnprintf); | |
1406 | ||
1407 | /** | |
1408 | * vsprintf - Format a string and place it in a buffer | |
1409 | * @buf: The buffer to place the result into | |
1410 | * @fmt: The format string to use | |
1411 | * @args: Arguments for the format string | |
1412 | * | |
1413 | * The function returns the number of characters written | |
72fd4a35 | 1414 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1415 | * buffer overflows. |
1416 | * | |
ba1835eb | 1417 | * If you're not already dealing with a va_list consider using sprintf(). |
20036fdc AK |
1418 | * |
1419 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1420 | */ |
1421 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1422 | { | |
1423 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1424 | } | |
1da177e4 LT |
1425 | EXPORT_SYMBOL(vsprintf); |
1426 | ||
1427 | /** | |
1428 | * sprintf - Format a string and place it in a buffer | |
1429 | * @buf: The buffer to place the result into | |
1430 | * @fmt: The format string to use | |
1431 | * @...: Arguments for the format string | |
1432 | * | |
1433 | * The function returns the number of characters written | |
72fd4a35 | 1434 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1435 | * buffer overflows. |
20036fdc AK |
1436 | * |
1437 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1438 | */ |
7b9186f5 | 1439 | int sprintf(char *buf, const char *fmt, ...) |
1da177e4 LT |
1440 | { |
1441 | va_list args; | |
1442 | int i; | |
1443 | ||
1444 | va_start(args, fmt); | |
7b9186f5 | 1445 | i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4 | 1446 | va_end(args); |
7b9186f5 | 1447 | |
1da177e4 LT |
1448 | return i; |
1449 | } | |
1da177e4 LT |
1450 | EXPORT_SYMBOL(sprintf); |
1451 | ||
4370aa4a LJ |
1452 | #ifdef CONFIG_BINARY_PRINTF |
1453 | /* | |
1454 | * bprintf service: | |
1455 | * vbin_printf() - VA arguments to binary data | |
1456 | * bstr_printf() - Binary data to text string | |
1457 | */ | |
1458 | ||
1459 | /** | |
1460 | * vbin_printf - Parse a format string and place args' binary value in a buffer | |
1461 | * @bin_buf: The buffer to place args' binary value | |
1462 | * @size: The size of the buffer(by words(32bits), not characters) | |
1463 | * @fmt: The format string to use | |
1464 | * @args: Arguments for the format string | |
1465 | * | |
1466 | * The format follows C99 vsnprintf, except %n is ignored, and its argument | |
1467 | * is skiped. | |
1468 | * | |
1469 | * The return value is the number of words(32bits) which would be generated for | |
1470 | * the given input. | |
1471 | * | |
1472 | * NOTE: | |
1473 | * If the return value is greater than @size, the resulting bin_buf is NOT | |
1474 | * valid for bstr_printf(). | |
1475 | */ | |
1476 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) | |
1477 | { | |
fef20d9c | 1478 | struct printf_spec spec = {0}; |
4370aa4a | 1479 | char *str, *end; |
4370aa4a LJ |
1480 | |
1481 | str = (char *)bin_buf; | |
1482 | end = (char *)(bin_buf + size); | |
1483 | ||
1484 | #define save_arg(type) \ | |
1485 | do { \ | |
1486 | if (sizeof(type) == 8) { \ | |
1487 | unsigned long long value; \ | |
1488 | str = PTR_ALIGN(str, sizeof(u32)); \ | |
1489 | value = va_arg(args, unsigned long long); \ | |
1490 | if (str + sizeof(type) <= end) { \ | |
1491 | *(u32 *)str = *(u32 *)&value; \ | |
1492 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ | |
1493 | } \ | |
1494 | } else { \ | |
1495 | unsigned long value; \ | |
1496 | str = PTR_ALIGN(str, sizeof(type)); \ | |
1497 | value = va_arg(args, int); \ | |
1498 | if (str + sizeof(type) <= end) \ | |
1499 | *(typeof(type) *)str = (type)value; \ | |
1500 | } \ | |
1501 | str += sizeof(type); \ | |
1502 | } while (0) | |
1503 | ||
fef20d9c | 1504 | while (*fmt) { |
d4be151b | 1505 | int read = format_decode(fmt, &spec); |
4370aa4a | 1506 | |
fef20d9c | 1507 | fmt += read; |
4370aa4a | 1508 | |
fef20d9c FW |
1509 | switch (spec.type) { |
1510 | case FORMAT_TYPE_NONE: | |
d4be151b AGR |
1511 | case FORMAT_TYPE_INVALID: |
1512 | case FORMAT_TYPE_PERCENT_CHAR: | |
fef20d9c FW |
1513 | break; |
1514 | ||
ed681a91 | 1515 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1516 | case FORMAT_TYPE_PRECISION: |
1517 | save_arg(int); | |
1518 | break; | |
1519 | ||
1520 | case FORMAT_TYPE_CHAR: | |
4370aa4a | 1521 | save_arg(char); |
fef20d9c FW |
1522 | break; |
1523 | ||
1524 | case FORMAT_TYPE_STR: { | |
4370aa4a LJ |
1525 | const char *save_str = va_arg(args, char *); |
1526 | size_t len; | |
6c356634 | 1527 | |
4370aa4a LJ |
1528 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
1529 | || (unsigned long)save_str < PAGE_SIZE) | |
0f4f81dc | 1530 | save_str = "(null)"; |
6c356634 AGR |
1531 | len = strlen(save_str) + 1; |
1532 | if (str + len < end) | |
1533 | memcpy(str, save_str, len); | |
1534 | str += len; | |
fef20d9c | 1535 | break; |
4370aa4a | 1536 | } |
fef20d9c FW |
1537 | |
1538 | case FORMAT_TYPE_PTR: | |
4370aa4a LJ |
1539 | save_arg(void *); |
1540 | /* skip all alphanumeric pointer suffixes */ | |
fef20d9c | 1541 | while (isalnum(*fmt)) |
4370aa4a | 1542 | fmt++; |
fef20d9c FW |
1543 | break; |
1544 | ||
fef20d9c | 1545 | case FORMAT_TYPE_NRCHARS: { |
4370aa4a | 1546 | /* skip %n 's argument */ |
ef0658f3 | 1547 | u8 qualifier = spec.qualifier; |
4370aa4a LJ |
1548 | void *skip_arg; |
1549 | if (qualifier == 'l') | |
1550 | skip_arg = va_arg(args, long *); | |
08562cb2 | 1551 | else if (TOLOWER(qualifier) == 'z') |
4370aa4a LJ |
1552 | skip_arg = va_arg(args, size_t *); |
1553 | else | |
1554 | skip_arg = va_arg(args, int *); | |
fef20d9c | 1555 | break; |
4370aa4a | 1556 | } |
fef20d9c FW |
1557 | |
1558 | default: | |
1559 | switch (spec.type) { | |
1560 | ||
1561 | case FORMAT_TYPE_LONG_LONG: | |
4370aa4a | 1562 | save_arg(long long); |
fef20d9c FW |
1563 | break; |
1564 | case FORMAT_TYPE_ULONG: | |
1565 | case FORMAT_TYPE_LONG: | |
4370aa4a | 1566 | save_arg(unsigned long); |
fef20d9c FW |
1567 | break; |
1568 | case FORMAT_TYPE_SIZE_T: | |
4370aa4a | 1569 | save_arg(size_t); |
fef20d9c FW |
1570 | break; |
1571 | case FORMAT_TYPE_PTRDIFF: | |
4370aa4a | 1572 | save_arg(ptrdiff_t); |
fef20d9c | 1573 | break; |
a4e94ef0 Z |
1574 | case FORMAT_TYPE_UBYTE: |
1575 | case FORMAT_TYPE_BYTE: | |
1576 | save_arg(char); | |
1577 | break; | |
fef20d9c FW |
1578 | case FORMAT_TYPE_USHORT: |
1579 | case FORMAT_TYPE_SHORT: | |
4370aa4a | 1580 | save_arg(short); |
fef20d9c FW |
1581 | break; |
1582 | default: | |
4370aa4a | 1583 | save_arg(int); |
fef20d9c | 1584 | } |
4370aa4a LJ |
1585 | } |
1586 | } | |
fef20d9c | 1587 | |
7b9186f5 | 1588 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c | 1589 | #undef save_arg |
4370aa4a LJ |
1590 | } |
1591 | EXPORT_SYMBOL_GPL(vbin_printf); | |
1592 | ||
1593 | /** | |
1594 | * bstr_printf - Format a string from binary arguments and place it in a buffer | |
1595 | * @buf: The buffer to place the result into | |
1596 | * @size: The size of the buffer, including the trailing null space | |
1597 | * @fmt: The format string to use | |
1598 | * @bin_buf: Binary arguments for the format string | |
1599 | * | |
1600 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets | |
1601 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is | |
1602 | * a binary buffer that generated by vbin_printf. | |
1603 | * | |
1604 | * The format follows C99 vsnprintf, but has some extensions: | |
0efb4d20 | 1605 | * see vsnprintf comment for details. |
4370aa4a LJ |
1606 | * |
1607 | * The return value is the number of characters which would | |
1608 | * be generated for the given input, excluding the trailing | |
1609 | * '\0', as per ISO C99. If you want to have the exact | |
1610 | * number of characters written into @buf as return value | |
1611 | * (not including the trailing '\0'), use vscnprintf(). If the | |
1612 | * return is greater than or equal to @size, the resulting | |
1613 | * string is truncated. | |
1614 | */ | |
1615 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) | |
1616 | { | |
fef20d9c | 1617 | struct printf_spec spec = {0}; |
d4be151b AGR |
1618 | char *str, *end; |
1619 | const char *args = (const char *)bin_buf; | |
4370aa4a | 1620 | |
2f30b1f9 | 1621 | if (WARN_ON_ONCE((int) size < 0)) |
4370aa4a | 1622 | return 0; |
4370aa4a LJ |
1623 | |
1624 | str = buf; | |
1625 | end = buf + size; | |
1626 | ||
1627 | #define get_arg(type) \ | |
1628 | ({ \ | |
1629 | typeof(type) value; \ | |
1630 | if (sizeof(type) == 8) { \ | |
1631 | args = PTR_ALIGN(args, sizeof(u32)); \ | |
1632 | *(u32 *)&value = *(u32 *)args; \ | |
1633 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ | |
1634 | } else { \ | |
1635 | args = PTR_ALIGN(args, sizeof(type)); \ | |
1636 | value = *(typeof(type) *)args; \ | |
1637 | } \ | |
1638 | args += sizeof(type); \ | |
1639 | value; \ | |
1640 | }) | |
1641 | ||
1642 | /* Make sure end is always >= buf */ | |
1643 | if (end < buf) { | |
1644 | end = ((void *)-1); | |
1645 | size = end - buf; | |
1646 | } | |
1647 | ||
fef20d9c | 1648 | while (*fmt) { |
fef20d9c | 1649 | const char *old_fmt = fmt; |
d4be151b | 1650 | int read = format_decode(fmt, &spec); |
4370aa4a | 1651 | |
fef20d9c | 1652 | fmt += read; |
4370aa4a | 1653 | |
fef20d9c FW |
1654 | switch (spec.type) { |
1655 | case FORMAT_TYPE_NONE: { | |
1656 | int copy = read; | |
1657 | if (str < end) { | |
1658 | if (copy > end - str) | |
1659 | copy = end - str; | |
1660 | memcpy(str, old_fmt, copy); | |
4370aa4a | 1661 | } |
fef20d9c FW |
1662 | str += read; |
1663 | break; | |
4370aa4a LJ |
1664 | } |
1665 | ||
ed681a91 | 1666 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1667 | spec.field_width = get_arg(int); |
1668 | break; | |
4370aa4a | 1669 | |
fef20d9c FW |
1670 | case FORMAT_TYPE_PRECISION: |
1671 | spec.precision = get_arg(int); | |
1672 | break; | |
4370aa4a | 1673 | |
d4be151b AGR |
1674 | case FORMAT_TYPE_CHAR: { |
1675 | char c; | |
1676 | ||
fef20d9c FW |
1677 | if (!(spec.flags & LEFT)) { |
1678 | while (--spec.field_width > 0) { | |
4370aa4a LJ |
1679 | if (str < end) |
1680 | *str = ' '; | |
1681 | ++str; | |
1682 | } | |
1683 | } | |
1684 | c = (unsigned char) get_arg(char); | |
1685 | if (str < end) | |
1686 | *str = c; | |
1687 | ++str; | |
fef20d9c | 1688 | while (--spec.field_width > 0) { |
4370aa4a LJ |
1689 | if (str < end) |
1690 | *str = ' '; | |
1691 | ++str; | |
1692 | } | |
fef20d9c | 1693 | break; |
d4be151b | 1694 | } |
4370aa4a | 1695 | |
fef20d9c | 1696 | case FORMAT_TYPE_STR: { |
4370aa4a | 1697 | const char *str_arg = args; |
d4be151b | 1698 | args += strlen(str_arg) + 1; |
fef20d9c FW |
1699 | str = string(str, end, (char *)str_arg, spec); |
1700 | break; | |
4370aa4a LJ |
1701 | } |
1702 | ||
fef20d9c FW |
1703 | case FORMAT_TYPE_PTR: |
1704 | str = pointer(fmt+1, str, end, get_arg(void *), spec); | |
1705 | while (isalnum(*fmt)) | |
4370aa4a | 1706 | fmt++; |
fef20d9c | 1707 | break; |
4370aa4a | 1708 | |
fef20d9c | 1709 | case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c | 1710 | case FORMAT_TYPE_INVALID: |
4370aa4a LJ |
1711 | if (str < end) |
1712 | *str = '%'; | |
1713 | ++str; | |
fef20d9c FW |
1714 | break; |
1715 | ||
1716 | case FORMAT_TYPE_NRCHARS: | |
1717 | /* skip */ | |
1718 | break; | |
1719 | ||
d4be151b AGR |
1720 | default: { |
1721 | unsigned long long num; | |
1722 | ||
fef20d9c FW |
1723 | switch (spec.type) { |
1724 | ||
1725 | case FORMAT_TYPE_LONG_LONG: | |
1726 | num = get_arg(long long); | |
1727 | break; | |
1728 | case FORMAT_TYPE_ULONG: | |
fef20d9c FW |
1729 | case FORMAT_TYPE_LONG: |
1730 | num = get_arg(unsigned long); | |
1731 | break; | |
1732 | case FORMAT_TYPE_SIZE_T: | |
1733 | num = get_arg(size_t); | |
1734 | break; | |
1735 | case FORMAT_TYPE_PTRDIFF: | |
1736 | num = get_arg(ptrdiff_t); | |
1737 | break; | |
a4e94ef0 Z |
1738 | case FORMAT_TYPE_UBYTE: |
1739 | num = get_arg(unsigned char); | |
1740 | break; | |
1741 | case FORMAT_TYPE_BYTE: | |
1742 | num = get_arg(signed char); | |
1743 | break; | |
fef20d9c FW |
1744 | case FORMAT_TYPE_USHORT: |
1745 | num = get_arg(unsigned short); | |
1746 | break; | |
1747 | case FORMAT_TYPE_SHORT: | |
1748 | num = get_arg(short); | |
1749 | break; | |
1750 | case FORMAT_TYPE_UINT: | |
1751 | num = get_arg(unsigned int); | |
1752 | break; | |
1753 | default: | |
1754 | num = get_arg(int); | |
1755 | } | |
1756 | ||
1757 | str = number(str, end, num, spec); | |
d4be151b AGR |
1758 | } /* default: */ |
1759 | } /* switch(spec.type) */ | |
1760 | } /* while(*fmt) */ | |
fef20d9c | 1761 | |
4370aa4a LJ |
1762 | if (size > 0) { |
1763 | if (str < end) | |
1764 | *str = '\0'; | |
1765 | else | |
1766 | end[-1] = '\0'; | |
1767 | } | |
fef20d9c | 1768 | |
4370aa4a LJ |
1769 | #undef get_arg |
1770 | ||
1771 | /* the trailing null byte doesn't count towards the total */ | |
1772 | return str - buf; | |
1773 | } | |
1774 | EXPORT_SYMBOL_GPL(bstr_printf); | |
1775 | ||
1776 | /** | |
1777 | * bprintf - Parse a format string and place args' binary value in a buffer | |
1778 | * @bin_buf: The buffer to place args' binary value | |
1779 | * @size: The size of the buffer(by words(32bits), not characters) | |
1780 | * @fmt: The format string to use | |
1781 | * @...: Arguments for the format string | |
1782 | * | |
1783 | * The function returns the number of words(u32) written | |
1784 | * into @bin_buf. | |
1785 | */ | |
1786 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) | |
1787 | { | |
1788 | va_list args; | |
1789 | int ret; | |
1790 | ||
1791 | va_start(args, fmt); | |
1792 | ret = vbin_printf(bin_buf, size, fmt, args); | |
1793 | va_end(args); | |
7b9186f5 | 1794 | |
4370aa4a LJ |
1795 | return ret; |
1796 | } | |
1797 | EXPORT_SYMBOL_GPL(bprintf); | |
1798 | ||
1799 | #endif /* CONFIG_BINARY_PRINTF */ | |
1800 | ||
1da177e4 LT |
1801 | /** |
1802 | * vsscanf - Unformat a buffer into a list of arguments | |
1803 | * @buf: input buffer | |
1804 | * @fmt: format of buffer | |
1805 | * @args: arguments | |
1806 | */ | |
7b9186f5 | 1807 | int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4 LT |
1808 | { |
1809 | const char *str = buf; | |
1810 | char *next; | |
1811 | char digit; | |
1812 | int num = 0; | |
ef0658f3 JP |
1813 | u8 qualifier; |
1814 | u8 base; | |
1815 | s16 field_width; | |
d4be151b | 1816 | bool is_sign; |
1da177e4 | 1817 | |
7b9186f5 | 1818 | while (*fmt && *str) { |
1da177e4 LT |
1819 | /* skip any white space in format */ |
1820 | /* white space in format matchs any amount of | |
1821 | * white space, including none, in the input. | |
1822 | */ | |
1823 | if (isspace(*fmt)) { | |
e7d2860b AGR |
1824 | fmt = skip_spaces(++fmt); |
1825 | str = skip_spaces(str); | |
1da177e4 LT |
1826 | } |
1827 | ||
1828 | /* anything that is not a conversion must match exactly */ | |
1829 | if (*fmt != '%' && *fmt) { | |
1830 | if (*fmt++ != *str++) | |
1831 | break; | |
1832 | continue; | |
1833 | } | |
1834 | ||
1835 | if (!*fmt) | |
1836 | break; | |
1837 | ++fmt; | |
7b9186f5 | 1838 | |
1da177e4 LT |
1839 | /* skip this conversion. |
1840 | * advance both strings to next white space | |
1841 | */ | |
1842 | if (*fmt == '*') { | |
8fccae2c | 1843 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4 LT |
1844 | fmt++; |
1845 | while (!isspace(*str) && *str) | |
1846 | str++; | |
1847 | continue; | |
1848 | } | |
1849 | ||
1850 | /* get field width */ | |
1851 | field_width = -1; | |
1852 | if (isdigit(*fmt)) | |
1853 | field_width = skip_atoi(&fmt); | |
1854 | ||
1855 | /* get conversion qualifier */ | |
1856 | qualifier = -1; | |
08562cb2 AGR |
1857 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1858 | TOLOWER(*fmt) == 'z') { | |
1da177e4 LT |
1859 | qualifier = *fmt++; |
1860 | if (unlikely(qualifier == *fmt)) { | |
1861 | if (qualifier == 'h') { | |
1862 | qualifier = 'H'; | |
1863 | fmt++; | |
1864 | } else if (qualifier == 'l') { | |
1865 | qualifier = 'L'; | |
1866 | fmt++; | |
1867 | } | |
1868 | } | |
1869 | } | |
1da177e4 LT |
1870 | |
1871 | if (!*fmt || !*str) | |
1872 | break; | |
1873 | ||
d4be151b AGR |
1874 | base = 10; |
1875 | is_sign = 0; | |
1876 | ||
7b9186f5 | 1877 | switch (*fmt++) { |
1da177e4 LT |
1878 | case 'c': |
1879 | { | |
7b9186f5 | 1880 | char *s = (char *)va_arg(args, char*); |
1da177e4 LT |
1881 | if (field_width == -1) |
1882 | field_width = 1; | |
1883 | do { | |
1884 | *s++ = *str++; | |
1885 | } while (--field_width > 0 && *str); | |
1886 | num++; | |
1887 | } | |
1888 | continue; | |
1889 | case 's': | |
1890 | { | |
7b9186f5 AGR |
1891 | char *s = (char *)va_arg(args, char *); |
1892 | if (field_width == -1) | |
4be929be | 1893 | field_width = SHRT_MAX; |
1da177e4 | 1894 | /* first, skip leading white space in buffer */ |
e7d2860b | 1895 | str = skip_spaces(str); |
1da177e4 LT |
1896 | |
1897 | /* now copy until next white space */ | |
7b9186f5 | 1898 | while (*str && !isspace(*str) && field_width--) |
1da177e4 | 1899 | *s++ = *str++; |
1da177e4 LT |
1900 | *s = '\0'; |
1901 | num++; | |
1902 | } | |
1903 | continue; | |
1904 | case 'n': | |
1905 | /* return number of characters read so far */ | |
1906 | { | |
7b9186f5 | 1907 | int *i = (int *)va_arg(args, int*); |
1da177e4 LT |
1908 | *i = str - buf; |
1909 | } | |
1910 | continue; | |
1911 | case 'o': | |
1912 | base = 8; | |
1913 | break; | |
1914 | case 'x': | |
1915 | case 'X': | |
1916 | base = 16; | |
1917 | break; | |
1918 | case 'i': | |
7b9186f5 | 1919 | base = 0; |
1da177e4 LT |
1920 | case 'd': |
1921 | is_sign = 1; | |
1922 | case 'u': | |
1923 | break; | |
1924 | case '%': | |
1925 | /* looking for '%' in str */ | |
7b9186f5 | 1926 | if (*str++ != '%') |
1da177e4 LT |
1927 | return num; |
1928 | continue; | |
1929 | default: | |
1930 | /* invalid format; stop here */ | |
1931 | return num; | |
1932 | } | |
1933 | ||
1934 | /* have some sort of integer conversion. | |
1935 | * first, skip white space in buffer. | |
1936 | */ | |
e7d2860b | 1937 | str = skip_spaces(str); |
1da177e4 LT |
1938 | |
1939 | digit = *str; | |
1940 | if (is_sign && digit == '-') | |
1941 | digit = *(str + 1); | |
1942 | ||
1943 | if (!digit | |
7b9186f5 AGR |
1944 | || (base == 16 && !isxdigit(digit)) |
1945 | || (base == 10 && !isdigit(digit)) | |
1946 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
1947 | || (base == 0 && !isdigit(digit))) | |
1948 | break; | |
1da177e4 | 1949 | |
7b9186f5 | 1950 | switch (qualifier) { |
1da177e4 LT |
1951 | case 'H': /* that's 'hh' in format */ |
1952 | if (is_sign) { | |
7b9186f5 AGR |
1953 | signed char *s = (signed char *)va_arg(args, signed char *); |
1954 | *s = (signed char)simple_strtol(str, &next, base); | |
1da177e4 | 1955 | } else { |
7b9186f5 AGR |
1956 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
1957 | *s = (unsigned char)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1958 | } |
1959 | break; | |
1960 | case 'h': | |
1961 | if (is_sign) { | |
7b9186f5 AGR |
1962 | short *s = (short *)va_arg(args, short *); |
1963 | *s = (short)simple_strtol(str, &next, base); | |
1da177e4 | 1964 | } else { |
7b9186f5 AGR |
1965 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
1966 | *s = (unsigned short)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1967 | } |
1968 | break; | |
1969 | case 'l': | |
1970 | if (is_sign) { | |
7b9186f5 AGR |
1971 | long *l = (long *)va_arg(args, long *); |
1972 | *l = simple_strtol(str, &next, base); | |
1da177e4 | 1973 | } else { |
7b9186f5 AGR |
1974 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
1975 | *l = simple_strtoul(str, &next, base); | |
1da177e4 LT |
1976 | } |
1977 | break; | |
1978 | case 'L': | |
1979 | if (is_sign) { | |
7b9186f5 AGR |
1980 | long long *l = (long long *)va_arg(args, long long *); |
1981 | *l = simple_strtoll(str, &next, base); | |
1da177e4 | 1982 | } else { |
7b9186f5 AGR |
1983 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
1984 | *l = simple_strtoull(str, &next, base); | |
1da177e4 LT |
1985 | } |
1986 | break; | |
1987 | case 'Z': | |
1988 | case 'z': | |
1989 | { | |
7b9186f5 AGR |
1990 | size_t *s = (size_t *)va_arg(args, size_t *); |
1991 | *s = (size_t)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1992 | } |
1993 | break; | |
1994 | default: | |
1995 | if (is_sign) { | |
7b9186f5 AGR |
1996 | int *i = (int *)va_arg(args, int *); |
1997 | *i = (int)simple_strtol(str, &next, base); | |
1da177e4 | 1998 | } else { |
7b9186f5 AGR |
1999 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
2000 | *i = (unsigned int)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2001 | } |
2002 | break; | |
2003 | } | |
2004 | num++; | |
2005 | ||
2006 | if (!next) | |
2007 | break; | |
2008 | str = next; | |
2009 | } | |
c6b40d16 JB |
2010 | |
2011 | /* | |
2012 | * Now we've come all the way through so either the input string or the | |
2013 | * format ended. In the former case, there can be a %n at the current | |
2014 | * position in the format that needs to be filled. | |
2015 | */ | |
2016 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
2017 | int *p = (int *)va_arg(args, int *); | |
2018 | *p = str - buf; | |
2019 | } | |
2020 | ||
1da177e4 LT |
2021 | return num; |
2022 | } | |
1da177e4 LT |
2023 | EXPORT_SYMBOL(vsscanf); |
2024 | ||
2025 | /** | |
2026 | * sscanf - Unformat a buffer into a list of arguments | |
2027 | * @buf: input buffer | |
2028 | * @fmt: formatting of buffer | |
2029 | * @...: resulting arguments | |
2030 | */ | |
7b9186f5 | 2031 | int sscanf(const char *buf, const char *fmt, ...) |
1da177e4 LT |
2032 | { |
2033 | va_list args; | |
2034 | int i; | |
2035 | ||
7b9186f5 AGR |
2036 | va_start(args, fmt); |
2037 | i = vsscanf(buf, fmt, args); | |
1da177e4 | 2038 | va_end(args); |
7b9186f5 | 2039 | |
1da177e4 LT |
2040 | return i; |
2041 | } | |
1da177e4 | 2042 | EXPORT_SYMBOL(sscanf); |