Commit | Line | Data |
---|---|---|
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]; | |
91adcd2c | 436 | if (ext != 'f' && ext != 's') |
0c8b946e FW |
437 | sprint_symbol(sym, value); |
438 | else | |
439 | kallsyms_lookup(value, NULL, NULL, NULL, sym); | |
7b9186f5 | 440 | |
fef20d9c | 441 | return string(buf, end, sym, spec); |
0fe1ef24 | 442 | #else |
7b9186f5 | 443 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
444 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
445 | spec.base = 16; | |
7b9186f5 | 446 | |
fef20d9c | 447 | return number(buf, end, value, spec); |
0fe1ef24 LT |
448 | #endif |
449 | } | |
450 | ||
cf3b429b JP |
451 | static noinline_for_stack |
452 | char *resource_string(char *buf, char *end, struct resource *res, | |
453 | struct printf_spec spec, const char *fmt) | |
332d2e78 LT |
454 | { |
455 | #ifndef IO_RSRC_PRINTK_SIZE | |
28405372 | 456 | #define IO_RSRC_PRINTK_SIZE 6 |
332d2e78 LT |
457 | #endif |
458 | ||
459 | #ifndef MEM_RSRC_PRINTK_SIZE | |
28405372 | 460 | #define MEM_RSRC_PRINTK_SIZE 10 |
332d2e78 | 461 | #endif |
4da0b66c | 462 | static const struct printf_spec io_spec = { |
fef20d9c | 463 | .base = 16, |
4da0b66c | 464 | .field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c FW |
465 | .precision = -1, |
466 | .flags = SPECIAL | SMALL | ZEROPAD, | |
467 | }; | |
4da0b66c BH |
468 | static const struct printf_spec mem_spec = { |
469 | .base = 16, | |
470 | .field_width = MEM_RSRC_PRINTK_SIZE, | |
471 | .precision = -1, | |
472 | .flags = SPECIAL | SMALL | ZEROPAD, | |
473 | }; | |
0f4050c7 BH |
474 | static const struct printf_spec bus_spec = { |
475 | .base = 16, | |
476 | .field_width = 2, | |
477 | .precision = -1, | |
478 | .flags = SMALL | ZEROPAD, | |
479 | }; | |
4da0b66c | 480 | static const struct printf_spec dec_spec = { |
c91d3376 BH |
481 | .base = 10, |
482 | .precision = -1, | |
483 | .flags = 0, | |
484 | }; | |
4da0b66c | 485 | static const struct printf_spec str_spec = { |
fd95541e BH |
486 | .field_width = -1, |
487 | .precision = 10, | |
488 | .flags = LEFT, | |
489 | }; | |
4da0b66c | 490 | static const struct printf_spec flag_spec = { |
fd95541e BH |
491 | .base = 16, |
492 | .precision = -1, | |
493 | .flags = SPECIAL | SMALL, | |
494 | }; | |
c7dabef8 BH |
495 | |
496 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
497 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
498 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
499 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
9d7cca04 | 500 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
c7dabef8 BH |
501 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
502 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
503 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
504 | ||
332d2e78 | 505 | char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8 | 506 | int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c | 507 | const struct printf_spec *specp; |
332d2e78 LT |
508 | |
509 | *p++ = '['; | |
4da0b66c | 510 | if (res->flags & IORESOURCE_IO) { |
c7dabef8 | 511 | p = string(p, pend, "io ", str_spec); |
4da0b66c BH |
512 | specp = &io_spec; |
513 | } else if (res->flags & IORESOURCE_MEM) { | |
c7dabef8 | 514 | p = string(p, pend, "mem ", str_spec); |
4da0b66c BH |
515 | specp = &mem_spec; |
516 | } else if (res->flags & IORESOURCE_IRQ) { | |
c7dabef8 | 517 | p = string(p, pend, "irq ", str_spec); |
4da0b66c BH |
518 | specp = &dec_spec; |
519 | } else if (res->flags & IORESOURCE_DMA) { | |
c7dabef8 | 520 | p = string(p, pend, "dma ", str_spec); |
4da0b66c | 521 | specp = &dec_spec; |
0f4050c7 BH |
522 | } else if (res->flags & IORESOURCE_BUS) { |
523 | p = string(p, pend, "bus ", str_spec); | |
524 | specp = &bus_spec; | |
4da0b66c | 525 | } else { |
c7dabef8 | 526 | p = string(p, pend, "??? ", str_spec); |
4da0b66c | 527 | specp = &mem_spec; |
c7dabef8 | 528 | decode = 0; |
fd95541e | 529 | } |
4da0b66c | 530 | p = number(p, pend, res->start, *specp); |
c91d3376 BH |
531 | if (res->start != res->end) { |
532 | *p++ = '-'; | |
4da0b66c | 533 | p = number(p, pend, res->end, *specp); |
c91d3376 | 534 | } |
c7dabef8 | 535 | if (decode) { |
fd95541e BH |
536 | if (res->flags & IORESOURCE_MEM_64) |
537 | p = string(p, pend, " 64bit", str_spec); | |
538 | if (res->flags & IORESOURCE_PREFETCH) | |
539 | p = string(p, pend, " pref", str_spec); | |
9d7cca04 BH |
540 | if (res->flags & IORESOURCE_WINDOW) |
541 | p = string(p, pend, " window", str_spec); | |
fd95541e BH |
542 | if (res->flags & IORESOURCE_DISABLED) |
543 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
544 | } else { |
545 | p = string(p, pend, " flags ", str_spec); | |
546 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 547 | } |
332d2e78 | 548 | *p++ = ']'; |
c7dabef8 | 549 | *p = '\0'; |
332d2e78 | 550 | |
fef20d9c | 551 | return string(buf, end, sym, spec); |
332d2e78 LT |
552 | } |
553 | ||
cf3b429b JP |
554 | static noinline_for_stack |
555 | char *mac_address_string(char *buf, char *end, u8 *addr, | |
556 | struct printf_spec spec, const char *fmt) | |
dd45c9cf | 557 | { |
8a27f7c9 | 558 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
559 | char *p = mac_addr; |
560 | int i; | |
bc7259a2 JP |
561 | char separator; |
562 | ||
563 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
564 | separator = '-'; |
565 | } else { | |
bc7259a2 JP |
566 | separator = ':'; |
567 | } | |
dd45c9cf HH |
568 | |
569 | for (i = 0; i < 6; i++) { | |
c8e00060 | 570 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 571 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 572 | *p++ = separator; |
dd45c9cf HH |
573 | } |
574 | *p = '\0'; | |
575 | ||
fef20d9c | 576 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
577 | } |
578 | ||
cf3b429b JP |
579 | static noinline_for_stack |
580 | char *ip4_string(char *p, const u8 *addr, const char *fmt) | |
8a27f7c9 JP |
581 | { |
582 | int i; | |
0159f24e JP |
583 | bool leading_zeros = (fmt[0] == 'i'); |
584 | int index; | |
585 | int step; | |
586 | ||
587 | switch (fmt[2]) { | |
588 | case 'h': | |
589 | #ifdef __BIG_ENDIAN | |
590 | index = 0; | |
591 | step = 1; | |
592 | #else | |
593 | index = 3; | |
594 | step = -1; | |
595 | #endif | |
596 | break; | |
597 | case 'l': | |
598 | index = 3; | |
599 | step = -1; | |
600 | break; | |
601 | case 'n': | |
602 | case 'b': | |
603 | default: | |
604 | index = 0; | |
605 | step = 1; | |
606 | break; | |
607 | } | |
8a27f7c9 JP |
608 | for (i = 0; i < 4; i++) { |
609 | char temp[3]; /* hold each IP quad in reverse order */ | |
0159f24e | 610 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c9 JP |
611 | if (leading_zeros) { |
612 | if (digits < 3) | |
613 | *p++ = '0'; | |
614 | if (digits < 2) | |
615 | *p++ = '0'; | |
616 | } | |
617 | /* reverse the digits in the quad */ | |
618 | while (digits--) | |
619 | *p++ = temp[digits]; | |
620 | if (i < 3) | |
621 | *p++ = '.'; | |
0159f24e | 622 | index += step; |
8a27f7c9 | 623 | } |
8a27f7c9 | 624 | *p = '\0'; |
7b9186f5 | 625 | |
8a27f7c9 JP |
626 | return p; |
627 | } | |
628 | ||
cf3b429b JP |
629 | static noinline_for_stack |
630 | char *ip6_compressed_string(char *p, const char *addr) | |
689afa7d | 631 | { |
7b9186f5 | 632 | int i, j, range; |
8a27f7c9 JP |
633 | unsigned char zerolength[8]; |
634 | int longest = 1; | |
635 | int colonpos = -1; | |
636 | u16 word; | |
7b9186f5 | 637 | u8 hi, lo; |
8a27f7c9 | 638 | bool needcolon = false; |
eb78cd26 JP |
639 | bool useIPv4; |
640 | struct in6_addr in6; | |
641 | ||
642 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
643 | ||
644 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
645 | |
646 | memset(zerolength, 0, sizeof(zerolength)); | |
647 | ||
648 | if (useIPv4) | |
649 | range = 6; | |
650 | else | |
651 | range = 8; | |
652 | ||
653 | /* find position of longest 0 run */ | |
654 | for (i = 0; i < range; i++) { | |
655 | for (j = i; j < range; j++) { | |
eb78cd26 | 656 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
657 | break; |
658 | zerolength[i]++; | |
659 | } | |
660 | } | |
661 | for (i = 0; i < range; i++) { | |
662 | if (zerolength[i] > longest) { | |
663 | longest = zerolength[i]; | |
664 | colonpos = i; | |
665 | } | |
666 | } | |
689afa7d | 667 | |
8a27f7c9 JP |
668 | /* emit address */ |
669 | for (i = 0; i < range; i++) { | |
670 | if (i == colonpos) { | |
671 | if (needcolon || i == 0) | |
672 | *p++ = ':'; | |
673 | *p++ = ':'; | |
674 | needcolon = false; | |
675 | i += longest - 1; | |
676 | continue; | |
677 | } | |
678 | if (needcolon) { | |
679 | *p++ = ':'; | |
680 | needcolon = false; | |
681 | } | |
682 | /* hex u16 without leading 0s */ | |
eb78cd26 | 683 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
684 | hi = word >> 8; |
685 | lo = word & 0xff; | |
686 | if (hi) { | |
687 | if (hi > 0x0f) | |
688 | p = pack_hex_byte(p, hi); | |
689 | else | |
690 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 691 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 692 | } |
b5ff992b | 693 | else if (lo > 0x0f) |
8a27f7c9 JP |
694 | p = pack_hex_byte(p, lo); |
695 | else | |
696 | *p++ = hex_asc_lo(lo); | |
697 | needcolon = true; | |
698 | } | |
699 | ||
700 | if (useIPv4) { | |
701 | if (needcolon) | |
702 | *p++ = ':'; | |
0159f24e | 703 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c9 | 704 | } |
8a27f7c9 | 705 | *p = '\0'; |
7b9186f5 | 706 | |
8a27f7c9 JP |
707 | return p; |
708 | } | |
709 | ||
cf3b429b JP |
710 | static noinline_for_stack |
711 | char *ip6_string(char *p, const char *addr, const char *fmt) | |
8a27f7c9 JP |
712 | { |
713 | int i; | |
7b9186f5 | 714 | |
689afa7d | 715 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
716 | p = pack_hex_byte(p, *addr++); |
717 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 718 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
719 | *p++ = ':'; |
720 | } | |
721 | *p = '\0'; | |
7b9186f5 | 722 | |
8a27f7c9 JP |
723 | return p; |
724 | } | |
725 | ||
cf3b429b JP |
726 | static noinline_for_stack |
727 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
728 | struct printf_spec spec, const char *fmt) | |
8a27f7c9 JP |
729 | { |
730 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
731 | ||
732 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 733 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 734 | else |
eb78cd26 | 735 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 736 | |
fef20d9c | 737 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
738 | } |
739 | ||
cf3b429b JP |
740 | static noinline_for_stack |
741 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, | |
742 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 743 | { |
8a27f7c9 | 744 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 745 | |
0159f24e | 746 | ip4_string(ip4_addr, addr, fmt); |
4aa99606 | 747 | |
fef20d9c | 748 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
749 | } |
750 | ||
cf3b429b JP |
751 | static noinline_for_stack |
752 | char *uuid_string(char *buf, char *end, const u8 *addr, | |
753 | struct printf_spec spec, const char *fmt) | |
9ac6e44e JP |
754 | { |
755 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
756 | char *p = uuid; | |
757 | int i; | |
758 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
759 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
760 | const u8 *index = be; | |
761 | bool uc = false; | |
762 | ||
763 | switch (*(++fmt)) { | |
764 | case 'L': | |
765 | uc = true; /* fall-through */ | |
766 | case 'l': | |
767 | index = le; | |
768 | break; | |
769 | case 'B': | |
770 | uc = true; | |
771 | break; | |
772 | } | |
773 | ||
774 | for (i = 0; i < 16; i++) { | |
775 | p = pack_hex_byte(p, addr[index[i]]); | |
776 | switch (i) { | |
777 | case 3: | |
778 | case 5: | |
779 | case 7: | |
780 | case 9: | |
781 | *p++ = '-'; | |
782 | break; | |
783 | } | |
784 | } | |
785 | ||
786 | *p = 0; | |
787 | ||
788 | if (uc) { | |
789 | p = uuid; | |
790 | do { | |
791 | *p = toupper(*p); | |
792 | } while (*(++p)); | |
793 | } | |
794 | ||
795 | return string(buf, end, uuid, spec); | |
796 | } | |
797 | ||
455cd5ab DR |
798 | int kptr_restrict = 1; |
799 | ||
4d8a743c LT |
800 | /* |
801 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
802 | * by an extra set of alphanumeric characters that are extended format | |
803 | * specifiers. | |
804 | * | |
332d2e78 LT |
805 | * Right now we handle: |
806 | * | |
0c8b946e FW |
807 | * - 'F' For symbolic function descriptor pointers with offset |
808 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
809 | * - 'S' For symbolic direct pointers with offset |
810 | * - 's' For symbolic direct pointers without offset | |
c7dabef8 BH |
811 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
812 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
813 | * - 'M' For a 6-byte MAC address, it prints the address in the |
814 | * usual colon-separated hex notation | |
8a27f7c9 | 815 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 816 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 817 | * with a dash-separated hex notation |
8a27f7c9 JP |
818 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
819 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
820 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
821 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
822 | * IPv6 omits the colons (01020304...0f) | |
823 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
0159f24e | 824 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c9 | 825 | * - 'I6c' for IPv6 addresses printed as specified by |
3f472402 | 826 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
9ac6e44e JP |
827 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
828 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
829 | * Options for %pU are: | |
830 | * b big endian lower case hex (default) | |
831 | * B big endian UPPER case hex | |
832 | * l little endian lower case hex | |
833 | * L little endian UPPER case hex | |
834 | * big endian output byte order is: | |
835 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
836 | * little endian output byte order is: | |
837 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
7db6f5fb JP |
838 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
839 | * call vsnprintf(->format, *->va_list). | |
840 | * Implements a "recursive vsnprintf". | |
841 | * Do not use this feature without some mechanism to verify the | |
842 | * correctness of the format string and va_list arguments. | |
455cd5ab | 843 | * - 'K' For a kernel pointer that should be hidden from unprivileged users |
9ac6e44e | 844 | * |
332d2e78 LT |
845 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
846 | * function pointers are really function descriptors, which contain a | |
847 | * pointer to the real address. | |
4d8a743c | 848 | */ |
cf3b429b JP |
849 | static noinline_for_stack |
850 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, | |
851 | struct printf_spec spec) | |
78a8bf69 | 852 | { |
9f36e2c4 | 853 | if (!ptr && *fmt != 'K') { |
5e057981 JP |
854 | /* |
855 | * Print (null) with the same width as a pointer so it makes | |
856 | * tabular output look nice. | |
857 | */ | |
858 | if (spec.field_width == -1) | |
859 | spec.field_width = 2 * sizeof(void *); | |
fef20d9c | 860 | return string(buf, end, "(null)", spec); |
5e057981 | 861 | } |
d97106ab | 862 | |
0fe1ef24 LT |
863 | switch (*fmt) { |
864 | case 'F': | |
0c8b946e | 865 | case 'f': |
0fe1ef24 LT |
866 | ptr = dereference_function_descriptor(ptr); |
867 | /* Fallthrough */ | |
868 | case 'S': | |
9ac6e44e | 869 | case 's': |
0c8b946e | 870 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 871 | case 'R': |
c7dabef8 | 872 | case 'r': |
fd95541e | 873 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
874 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
875 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 876 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
877 | return mac_address_string(buf, end, ptr, spec, fmt); |
878 | case 'I': /* Formatted IP supported | |
879 | * 4: 1.2.3.4 | |
880 | * 6: 0001:0203:...:0708 | |
881 | * 6c: 1::708 or 1::1.2.3.4 | |
882 | */ | |
883 | case 'i': /* Contiguous: | |
884 | * 4: 001.002.003.004 | |
885 | * 6: 000102...0f | |
886 | */ | |
887 | switch (fmt[1]) { | |
888 | case '6': | |
889 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
890 | case '4': | |
891 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
892 | } | |
fef20d9c | 893 | break; |
9ac6e44e JP |
894 | case 'U': |
895 | return uuid_string(buf, end, ptr, spec, fmt); | |
7db6f5fb JP |
896 | case 'V': |
897 | return buf + vsnprintf(buf, end - buf, | |
898 | ((struct va_format *)ptr)->fmt, | |
899 | *(((struct va_format *)ptr)->va)); | |
455cd5ab DR |
900 | case 'K': |
901 | /* | |
902 | * %pK cannot be used in IRQ context because its test | |
903 | * for CAP_SYSLOG would be meaningless. | |
904 | */ | |
905 | if (in_irq() || in_serving_softirq() || in_nmi()) { | |
906 | if (spec.field_width == -1) | |
907 | spec.field_width = 2 * sizeof(void *); | |
908 | return string(buf, end, "pK-error", spec); | |
455cd5ab | 909 | } |
26297607 JP |
910 | if (!((kptr_restrict == 0) || |
911 | (kptr_restrict == 1 && | |
912 | has_capability_noaudit(current, CAP_SYSLOG)))) | |
913 | ptr = NULL; | |
914 | break; | |
fef20d9c FW |
915 | } |
916 | spec.flags |= SMALL; | |
917 | if (spec.field_width == -1) { | |
5e057981 | 918 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
919 | spec.flags |= ZEROPAD; |
920 | } | |
921 | spec.base = 16; | |
922 | ||
923 | return number(buf, end, (unsigned long) ptr, spec); | |
924 | } | |
925 | ||
926 | /* | |
927 | * Helper function to decode printf style format. | |
928 | * Each call decode a token from the format and return the | |
929 | * number of characters read (or likely the delta where it wants | |
930 | * to go on the next call). | |
931 | * The decoded token is returned through the parameters | |
932 | * | |
933 | * 'h', 'l', or 'L' for integer fields | |
934 | * 'z' support added 23/7/1999 S.H. | |
935 | * 'z' changed to 'Z' --davidm 1/25/99 | |
936 | * 't' added for ptrdiff_t | |
937 | * | |
938 | * @fmt: the format string | |
939 | * @type of the token returned | |
940 | * @flags: various flags such as +, -, # tokens.. | |
941 | * @field_width: overwritten width | |
942 | * @base: base of the number (octal, hex, ...) | |
943 | * @precision: precision of a number | |
944 | * @qualifier: qualifier of a number (long, size_t, ...) | |
945 | */ | |
cf3b429b JP |
946 | static noinline_for_stack |
947 | int format_decode(const char *fmt, struct printf_spec *spec) | |
fef20d9c FW |
948 | { |
949 | const char *start = fmt; | |
fef20d9c FW |
950 | |
951 | /* we finished early by reading the field width */ | |
ed681a91 | 952 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
953 | if (spec->field_width < 0) { |
954 | spec->field_width = -spec->field_width; | |
955 | spec->flags |= LEFT; | |
956 | } | |
957 | spec->type = FORMAT_TYPE_NONE; | |
958 | goto precision; | |
959 | } | |
960 | ||
961 | /* we finished early by reading the precision */ | |
962 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
963 | if (spec->precision < 0) | |
964 | spec->precision = 0; | |
965 | ||
966 | spec->type = FORMAT_TYPE_NONE; | |
967 | goto qualifier; | |
968 | } | |
969 | ||
970 | /* By default */ | |
971 | spec->type = FORMAT_TYPE_NONE; | |
972 | ||
973 | for (; *fmt ; ++fmt) { | |
974 | if (*fmt == '%') | |
975 | break; | |
976 | } | |
977 | ||
978 | /* Return the current non-format string */ | |
979 | if (fmt != start || !*fmt) | |
980 | return fmt - start; | |
981 | ||
982 | /* Process flags */ | |
983 | spec->flags = 0; | |
984 | ||
985 | while (1) { /* this also skips first '%' */ | |
986 | bool found = true; | |
987 | ||
988 | ++fmt; | |
989 | ||
990 | switch (*fmt) { | |
991 | case '-': spec->flags |= LEFT; break; | |
992 | case '+': spec->flags |= PLUS; break; | |
993 | case ' ': spec->flags |= SPACE; break; | |
994 | case '#': spec->flags |= SPECIAL; break; | |
995 | case '0': spec->flags |= ZEROPAD; break; | |
996 | default: found = false; | |
997 | } | |
998 | ||
999 | if (!found) | |
1000 | break; | |
1001 | } | |
1002 | ||
1003 | /* get field width */ | |
1004 | spec->field_width = -1; | |
1005 | ||
1006 | if (isdigit(*fmt)) | |
1007 | spec->field_width = skip_atoi(&fmt); | |
1008 | else if (*fmt == '*') { | |
1009 | /* it's the next argument */ | |
ed681a91 | 1010 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1011 | return ++fmt - start; |
1012 | } | |
1013 | ||
1014 | precision: | |
1015 | /* get the precision */ | |
1016 | spec->precision = -1; | |
1017 | if (*fmt == '.') { | |
1018 | ++fmt; | |
1019 | if (isdigit(*fmt)) { | |
1020 | spec->precision = skip_atoi(&fmt); | |
1021 | if (spec->precision < 0) | |
1022 | spec->precision = 0; | |
1023 | } else if (*fmt == '*') { | |
1024 | /* it's the next argument */ | |
adf26f84 | 1025 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1026 | return ++fmt - start; |
1027 | } | |
1028 | } | |
1029 | ||
1030 | qualifier: | |
1031 | /* get the conversion qualifier */ | |
1032 | spec->qualifier = -1; | |
08562cb2 AGR |
1033 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1034 | TOLOWER(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1035 | spec->qualifier = *fmt++; |
1036 | if (unlikely(spec->qualifier == *fmt)) { | |
1037 | if (spec->qualifier == 'l') { | |
1038 | spec->qualifier = 'L'; | |
1039 | ++fmt; | |
1040 | } else if (spec->qualifier == 'h') { | |
1041 | spec->qualifier = 'H'; | |
1042 | ++fmt; | |
1043 | } | |
fef20d9c FW |
1044 | } |
1045 | } | |
1046 | ||
1047 | /* default base */ | |
1048 | spec->base = 10; | |
1049 | switch (*fmt) { | |
1050 | case 'c': | |
1051 | spec->type = FORMAT_TYPE_CHAR; | |
1052 | return ++fmt - start; | |
1053 | ||
1054 | case 's': | |
1055 | spec->type = FORMAT_TYPE_STR; | |
1056 | return ++fmt - start; | |
1057 | ||
1058 | case 'p': | |
1059 | spec->type = FORMAT_TYPE_PTR; | |
1060 | return fmt - start; | |
1061 | /* skip alnum */ | |
1062 | ||
1063 | case 'n': | |
1064 | spec->type = FORMAT_TYPE_NRCHARS; | |
1065 | return ++fmt - start; | |
1066 | ||
1067 | case '%': | |
1068 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1069 | return ++fmt - start; | |
1070 | ||
1071 | /* integer number formats - set up the flags and "break" */ | |
1072 | case 'o': | |
1073 | spec->base = 8; | |
1074 | break; | |
1075 | ||
1076 | case 'x': | |
1077 | spec->flags |= SMALL; | |
1078 | ||
1079 | case 'X': | |
1080 | spec->base = 16; | |
1081 | break; | |
1082 | ||
1083 | case 'd': | |
1084 | case 'i': | |
39e874f8 | 1085 | spec->flags |= SIGN; |
fef20d9c | 1086 | case 'u': |
4aa99606 | 1087 | break; |
fef20d9c FW |
1088 | |
1089 | default: | |
1090 | spec->type = FORMAT_TYPE_INVALID; | |
1091 | return fmt - start; | |
0fe1ef24 | 1092 | } |
fef20d9c FW |
1093 | |
1094 | if (spec->qualifier == 'L') | |
1095 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1096 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1097 | if (spec->flags & SIGN) |
fef20d9c FW |
1098 | spec->type = FORMAT_TYPE_LONG; |
1099 | else | |
1100 | spec->type = FORMAT_TYPE_ULONG; | |
08562cb2 | 1101 | } else if (TOLOWER(spec->qualifier) == 'z') { |
fef20d9c FW |
1102 | spec->type = FORMAT_TYPE_SIZE_T; |
1103 | } else if (spec->qualifier == 't') { | |
1104 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1105 | } else if (spec->qualifier == 'H') { |
1106 | if (spec->flags & SIGN) | |
1107 | spec->type = FORMAT_TYPE_BYTE; | |
1108 | else | |
1109 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1110 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1111 | if (spec->flags & SIGN) |
fef20d9c FW |
1112 | spec->type = FORMAT_TYPE_SHORT; |
1113 | else | |
1114 | spec->type = FORMAT_TYPE_USHORT; | |
1115 | } else { | |
39e874f8 | 1116 | if (spec->flags & SIGN) |
fef20d9c FW |
1117 | spec->type = FORMAT_TYPE_INT; |
1118 | else | |
1119 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1120 | } |
fef20d9c FW |
1121 | |
1122 | return ++fmt - start; | |
78a8bf69 LT |
1123 | } |
1124 | ||
1da177e4 LT |
1125 | /** |
1126 | * vsnprintf - Format a string and place it in a buffer | |
1127 | * @buf: The buffer to place the result into | |
1128 | * @size: The size of the buffer, including the trailing null space | |
1129 | * @fmt: The format string to use | |
1130 | * @args: Arguments for the format string | |
1131 | * | |
20036fdc | 1132 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1133 | * %pS output the name of a text symbol with offset |
1134 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1135 | * %pF output the name of a function pointer with its offset |
1136 | * %pf output the name of a function pointer without its offset | |
8a79503a UKK |
1137 | * %pR output the address range in a struct resource with decoded flags |
1138 | * %pr output the address range in a struct resource with raw flags | |
1139 | * %pM output a 6-byte MAC address with colons | |
1140 | * %pm output a 6-byte MAC address without colons | |
1141 | * %pI4 print an IPv4 address without leading zeros | |
1142 | * %pi4 print an IPv4 address with leading zeros | |
1143 | * %pI6 print an IPv6 address with colons | |
1144 | * %pi6 print an IPv6 address without colons | |
1145 | * %pI6c print an IPv6 address as specified by | |
3f472402 | 1146 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
8a79503a UKK |
1147 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
1148 | * case. | |
0efb4d20 | 1149 | * %n is ignored |
20036fdc | 1150 | * |
1da177e4 LT |
1151 | * The return value is the number of characters which would |
1152 | * be generated for the given input, excluding the trailing | |
1153 | * '\0', as per ISO C99. If you want to have the exact | |
1154 | * number of characters written into @buf as return value | |
72fd4a35 | 1155 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1156 | * return is greater than or equal to @size, the resulting |
1157 | * string is truncated. | |
1158 | * | |
1159 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1160 | * You probably want snprintf() instead. |
1da177e4 LT |
1161 | */ |
1162 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1163 | { | |
1da177e4 | 1164 | unsigned long long num; |
d4be151b | 1165 | char *str, *end; |
fef20d9c | 1166 | struct printf_spec spec = {0}; |
1da177e4 | 1167 | |
f796937a JF |
1168 | /* Reject out-of-range values early. Large positive sizes are |
1169 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1170 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1171 | return 0; |
1da177e4 LT |
1172 | |
1173 | str = buf; | |
f796937a | 1174 | end = buf + size; |
1da177e4 | 1175 | |
f796937a JF |
1176 | /* Make sure end is always >= buf */ |
1177 | if (end < buf) { | |
1178 | end = ((void *)-1); | |
1179 | size = end - buf; | |
1da177e4 LT |
1180 | } |
1181 | ||
fef20d9c FW |
1182 | while (*fmt) { |
1183 | const char *old_fmt = fmt; | |
d4be151b | 1184 | int read = format_decode(fmt, &spec); |
1da177e4 | 1185 | |
fef20d9c | 1186 | fmt += read; |
1da177e4 | 1187 | |
fef20d9c FW |
1188 | switch (spec.type) { |
1189 | case FORMAT_TYPE_NONE: { | |
1190 | int copy = read; | |
1191 | if (str < end) { | |
1192 | if (copy > end - str) | |
1193 | copy = end - str; | |
1194 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1195 | } |
fef20d9c FW |
1196 | str += read; |
1197 | break; | |
1da177e4 LT |
1198 | } |
1199 | ||
ed681a91 | 1200 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1201 | spec.field_width = va_arg(args, int); |
1202 | break; | |
1da177e4 | 1203 | |
fef20d9c FW |
1204 | case FORMAT_TYPE_PRECISION: |
1205 | spec.precision = va_arg(args, int); | |
1206 | break; | |
1da177e4 | 1207 | |
d4be151b AGR |
1208 | case FORMAT_TYPE_CHAR: { |
1209 | char c; | |
1210 | ||
fef20d9c FW |
1211 | if (!(spec.flags & LEFT)) { |
1212 | while (--spec.field_width > 0) { | |
f796937a | 1213 | if (str < end) |
1da177e4 LT |
1214 | *str = ' '; |
1215 | ++str; | |
1da177e4 | 1216 | |
fef20d9c FW |
1217 | } |
1218 | } | |
1219 | c = (unsigned char) va_arg(args, int); | |
1220 | if (str < end) | |
1221 | *str = c; | |
1222 | ++str; | |
1223 | while (--spec.field_width > 0) { | |
f796937a | 1224 | if (str < end) |
fef20d9c | 1225 | *str = ' '; |
1da177e4 | 1226 | ++str; |
fef20d9c FW |
1227 | } |
1228 | break; | |
d4be151b | 1229 | } |
1da177e4 | 1230 | |
fef20d9c FW |
1231 | case FORMAT_TYPE_STR: |
1232 | str = string(str, end, va_arg(args, char *), spec); | |
1233 | break; | |
1da177e4 | 1234 | |
fef20d9c FW |
1235 | case FORMAT_TYPE_PTR: |
1236 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1237 | spec); | |
1238 | while (isalnum(*fmt)) | |
1239 | fmt++; | |
1240 | break; | |
1da177e4 | 1241 | |
fef20d9c FW |
1242 | case FORMAT_TYPE_PERCENT_CHAR: |
1243 | if (str < end) | |
1244 | *str = '%'; | |
1245 | ++str; | |
1246 | break; | |
1da177e4 | 1247 | |
fef20d9c FW |
1248 | case FORMAT_TYPE_INVALID: |
1249 | if (str < end) | |
1250 | *str = '%'; | |
1251 | ++str; | |
fef20d9c FW |
1252 | break; |
1253 | ||
1254 | case FORMAT_TYPE_NRCHARS: { | |
ef0658f3 | 1255 | u8 qualifier = spec.qualifier; |
fef20d9c FW |
1256 | |
1257 | if (qualifier == 'l') { | |
1258 | long *ip = va_arg(args, long *); | |
1259 | *ip = (str - buf); | |
08562cb2 | 1260 | } else if (TOLOWER(qualifier) == 'z') { |
fef20d9c FW |
1261 | size_t *ip = va_arg(args, size_t *); |
1262 | *ip = (str - buf); | |
1263 | } else { | |
1264 | int *ip = va_arg(args, int *); | |
1265 | *ip = (str - buf); | |
1266 | } | |
1267 | break; | |
1da177e4 | 1268 | } |
fef20d9c FW |
1269 | |
1270 | default: | |
1271 | switch (spec.type) { | |
1272 | case FORMAT_TYPE_LONG_LONG: | |
1273 | num = va_arg(args, long long); | |
1274 | break; | |
1275 | case FORMAT_TYPE_ULONG: | |
1276 | num = va_arg(args, unsigned long); | |
1277 | break; | |
1278 | case FORMAT_TYPE_LONG: | |
1279 | num = va_arg(args, long); | |
1280 | break; | |
1281 | case FORMAT_TYPE_SIZE_T: | |
1282 | num = va_arg(args, size_t); | |
1283 | break; | |
1284 | case FORMAT_TYPE_PTRDIFF: | |
1285 | num = va_arg(args, ptrdiff_t); | |
1286 | break; | |
a4e94ef0 Z |
1287 | case FORMAT_TYPE_UBYTE: |
1288 | num = (unsigned char) va_arg(args, int); | |
1289 | break; | |
1290 | case FORMAT_TYPE_BYTE: | |
1291 | num = (signed char) va_arg(args, int); | |
1292 | break; | |
fef20d9c FW |
1293 | case FORMAT_TYPE_USHORT: |
1294 | num = (unsigned short) va_arg(args, int); | |
1295 | break; | |
1296 | case FORMAT_TYPE_SHORT: | |
1297 | num = (short) va_arg(args, int); | |
1298 | break; | |
39e874f8 FW |
1299 | case FORMAT_TYPE_INT: |
1300 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1301 | break; |
1302 | default: | |
1303 | num = va_arg(args, unsigned int); | |
1304 | } | |
1305 | ||
1306 | str = number(str, end, num, spec); | |
1da177e4 | 1307 | } |
1da177e4 | 1308 | } |
fef20d9c | 1309 | |
f796937a JF |
1310 | if (size > 0) { |
1311 | if (str < end) | |
1312 | *str = '\0'; | |
1313 | else | |
0a6047ee | 1314 | end[-1] = '\0'; |
f796937a | 1315 | } |
fef20d9c | 1316 | |
f796937a | 1317 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1318 | return str-buf; |
fef20d9c | 1319 | |
1da177e4 | 1320 | } |
1da177e4 LT |
1321 | EXPORT_SYMBOL(vsnprintf); |
1322 | ||
1323 | /** | |
1324 | * vscnprintf - Format a string and place it in a buffer | |
1325 | * @buf: The buffer to place the result into | |
1326 | * @size: The size of the buffer, including the trailing null space | |
1327 | * @fmt: The format string to use | |
1328 | * @args: Arguments for the format string | |
1329 | * | |
1330 | * The return value is the number of characters which have been written into | |
b921c69f | 1331 | * the @buf not including the trailing '\0'. If @size is == 0 the function |
1da177e4 LT |
1332 | * returns 0. |
1333 | * | |
1334 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1335 | * You probably want scnprintf() instead. |
20036fdc AK |
1336 | * |
1337 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1338 | */ |
1339 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1340 | { | |
1341 | int i; | |
1342 | ||
7b9186f5 AGR |
1343 | i = vsnprintf(buf, size, fmt, args); |
1344 | ||
b921c69f AA |
1345 | if (likely(i < size)) |
1346 | return i; | |
1347 | if (size != 0) | |
1348 | return size - 1; | |
1349 | return 0; | |
1da177e4 | 1350 | } |
1da177e4 LT |
1351 | EXPORT_SYMBOL(vscnprintf); |
1352 | ||
1353 | /** | |
1354 | * snprintf - Format a string and place it in a buffer | |
1355 | * @buf: The buffer to place the result into | |
1356 | * @size: The size of the buffer, including the trailing null space | |
1357 | * @fmt: The format string to use | |
1358 | * @...: Arguments for the format string | |
1359 | * | |
1360 | * The return value is the number of characters which would be | |
1361 | * generated for the given input, excluding the trailing null, | |
1362 | * as per ISO C99. If the return is greater than or equal to | |
1363 | * @size, the resulting string is truncated. | |
20036fdc AK |
1364 | * |
1365 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1366 | */ |
7b9186f5 | 1367 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1368 | { |
1369 | va_list args; | |
1370 | int i; | |
1371 | ||
1372 | va_start(args, fmt); | |
7b9186f5 | 1373 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1374 | va_end(args); |
7b9186f5 | 1375 | |
1da177e4 LT |
1376 | return i; |
1377 | } | |
1da177e4 LT |
1378 | EXPORT_SYMBOL(snprintf); |
1379 | ||
1380 | /** | |
1381 | * scnprintf - Format a string and place it in a buffer | |
1382 | * @buf: The buffer to place the result into | |
1383 | * @size: The size of the buffer, including the trailing null space | |
1384 | * @fmt: The format string to use | |
1385 | * @...: Arguments for the format string | |
1386 | * | |
1387 | * The return value is the number of characters written into @buf not including | |
b903c0b8 | 1388 | * the trailing '\0'. If @size is == 0 the function returns 0. |
1da177e4 LT |
1389 | */ |
1390 | ||
7b9186f5 | 1391 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1392 | { |
1393 | va_list args; | |
1394 | int i; | |
1395 | ||
1396 | va_start(args, fmt); | |
b921c69f | 1397 | i = vscnprintf(buf, size, fmt, args); |
1da177e4 | 1398 | va_end(args); |
7b9186f5 | 1399 | |
b921c69f | 1400 | return i; |
1da177e4 LT |
1401 | } |
1402 | EXPORT_SYMBOL(scnprintf); | |
1403 | ||
1404 | /** | |
1405 | * vsprintf - Format a string and place it in a buffer | |
1406 | * @buf: The buffer to place the result into | |
1407 | * @fmt: The format string to use | |
1408 | * @args: Arguments for the format string | |
1409 | * | |
1410 | * The function returns the number of characters written | |
72fd4a35 | 1411 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1412 | * buffer overflows. |
1413 | * | |
1414 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1415 | * You probably want sprintf() instead. |
20036fdc AK |
1416 | * |
1417 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1418 | */ |
1419 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1420 | { | |
1421 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1422 | } | |
1da177e4 LT |
1423 | EXPORT_SYMBOL(vsprintf); |
1424 | ||
1425 | /** | |
1426 | * sprintf - Format a string and place it in a buffer | |
1427 | * @buf: The buffer to place the result into | |
1428 | * @fmt: The format string to use | |
1429 | * @...: Arguments for the format string | |
1430 | * | |
1431 | * The function returns the number of characters written | |
72fd4a35 | 1432 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1433 | * buffer overflows. |
20036fdc AK |
1434 | * |
1435 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1436 | */ |
7b9186f5 | 1437 | int sprintf(char *buf, const char *fmt, ...) |
1da177e4 LT |
1438 | { |
1439 | va_list args; | |
1440 | int i; | |
1441 | ||
1442 | va_start(args, fmt); | |
7b9186f5 | 1443 | i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4 | 1444 | va_end(args); |
7b9186f5 | 1445 | |
1da177e4 LT |
1446 | return i; |
1447 | } | |
1da177e4 LT |
1448 | EXPORT_SYMBOL(sprintf); |
1449 | ||
4370aa4a LJ |
1450 | #ifdef CONFIG_BINARY_PRINTF |
1451 | /* | |
1452 | * bprintf service: | |
1453 | * vbin_printf() - VA arguments to binary data | |
1454 | * bstr_printf() - Binary data to text string | |
1455 | */ | |
1456 | ||
1457 | /** | |
1458 | * vbin_printf - Parse a format string and place args' binary value in a buffer | |
1459 | * @bin_buf: The buffer to place args' binary value | |
1460 | * @size: The size of the buffer(by words(32bits), not characters) | |
1461 | * @fmt: The format string to use | |
1462 | * @args: Arguments for the format string | |
1463 | * | |
1464 | * The format follows C99 vsnprintf, except %n is ignored, and its argument | |
1465 | * is skiped. | |
1466 | * | |
1467 | * The return value is the number of words(32bits) which would be generated for | |
1468 | * the given input. | |
1469 | * | |
1470 | * NOTE: | |
1471 | * If the return value is greater than @size, the resulting bin_buf is NOT | |
1472 | * valid for bstr_printf(). | |
1473 | */ | |
1474 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) | |
1475 | { | |
fef20d9c | 1476 | struct printf_spec spec = {0}; |
4370aa4a | 1477 | char *str, *end; |
4370aa4a LJ |
1478 | |
1479 | str = (char *)bin_buf; | |
1480 | end = (char *)(bin_buf + size); | |
1481 | ||
1482 | #define save_arg(type) \ | |
1483 | do { \ | |
1484 | if (sizeof(type) == 8) { \ | |
1485 | unsigned long long value; \ | |
1486 | str = PTR_ALIGN(str, sizeof(u32)); \ | |
1487 | value = va_arg(args, unsigned long long); \ | |
1488 | if (str + sizeof(type) <= end) { \ | |
1489 | *(u32 *)str = *(u32 *)&value; \ | |
1490 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ | |
1491 | } \ | |
1492 | } else { \ | |
1493 | unsigned long value; \ | |
1494 | str = PTR_ALIGN(str, sizeof(type)); \ | |
1495 | value = va_arg(args, int); \ | |
1496 | if (str + sizeof(type) <= end) \ | |
1497 | *(typeof(type) *)str = (type)value; \ | |
1498 | } \ | |
1499 | str += sizeof(type); \ | |
1500 | } while (0) | |
1501 | ||
fef20d9c | 1502 | while (*fmt) { |
d4be151b | 1503 | int read = format_decode(fmt, &spec); |
4370aa4a | 1504 | |
fef20d9c | 1505 | fmt += read; |
4370aa4a | 1506 | |
fef20d9c FW |
1507 | switch (spec.type) { |
1508 | case FORMAT_TYPE_NONE: | |
d4be151b AGR |
1509 | case FORMAT_TYPE_INVALID: |
1510 | case FORMAT_TYPE_PERCENT_CHAR: | |
fef20d9c FW |
1511 | break; |
1512 | ||
ed681a91 | 1513 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1514 | case FORMAT_TYPE_PRECISION: |
1515 | save_arg(int); | |
1516 | break; | |
1517 | ||
1518 | case FORMAT_TYPE_CHAR: | |
4370aa4a | 1519 | save_arg(char); |
fef20d9c FW |
1520 | break; |
1521 | ||
1522 | case FORMAT_TYPE_STR: { | |
4370aa4a LJ |
1523 | const char *save_str = va_arg(args, char *); |
1524 | size_t len; | |
6c356634 | 1525 | |
4370aa4a LJ |
1526 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
1527 | || (unsigned long)save_str < PAGE_SIZE) | |
0f4f81dc | 1528 | save_str = "(null)"; |
6c356634 AGR |
1529 | len = strlen(save_str) + 1; |
1530 | if (str + len < end) | |
1531 | memcpy(str, save_str, len); | |
1532 | str += len; | |
fef20d9c | 1533 | break; |
4370aa4a | 1534 | } |
fef20d9c FW |
1535 | |
1536 | case FORMAT_TYPE_PTR: | |
4370aa4a LJ |
1537 | save_arg(void *); |
1538 | /* skip all alphanumeric pointer suffixes */ | |
fef20d9c | 1539 | while (isalnum(*fmt)) |
4370aa4a | 1540 | fmt++; |
fef20d9c FW |
1541 | break; |
1542 | ||
fef20d9c | 1543 | case FORMAT_TYPE_NRCHARS: { |
4370aa4a | 1544 | /* skip %n 's argument */ |
ef0658f3 | 1545 | u8 qualifier = spec.qualifier; |
4370aa4a LJ |
1546 | void *skip_arg; |
1547 | if (qualifier == 'l') | |
1548 | skip_arg = va_arg(args, long *); | |
08562cb2 | 1549 | else if (TOLOWER(qualifier) == 'z') |
4370aa4a LJ |
1550 | skip_arg = va_arg(args, size_t *); |
1551 | else | |
1552 | skip_arg = va_arg(args, int *); | |
fef20d9c | 1553 | break; |
4370aa4a | 1554 | } |
fef20d9c FW |
1555 | |
1556 | default: | |
1557 | switch (spec.type) { | |
1558 | ||
1559 | case FORMAT_TYPE_LONG_LONG: | |
4370aa4a | 1560 | save_arg(long long); |
fef20d9c FW |
1561 | break; |
1562 | case FORMAT_TYPE_ULONG: | |
1563 | case FORMAT_TYPE_LONG: | |
4370aa4a | 1564 | save_arg(unsigned long); |
fef20d9c FW |
1565 | break; |
1566 | case FORMAT_TYPE_SIZE_T: | |
4370aa4a | 1567 | save_arg(size_t); |
fef20d9c FW |
1568 | break; |
1569 | case FORMAT_TYPE_PTRDIFF: | |
4370aa4a | 1570 | save_arg(ptrdiff_t); |
fef20d9c | 1571 | break; |
a4e94ef0 Z |
1572 | case FORMAT_TYPE_UBYTE: |
1573 | case FORMAT_TYPE_BYTE: | |
1574 | save_arg(char); | |
1575 | break; | |
fef20d9c FW |
1576 | case FORMAT_TYPE_USHORT: |
1577 | case FORMAT_TYPE_SHORT: | |
4370aa4a | 1578 | save_arg(short); |
fef20d9c FW |
1579 | break; |
1580 | default: | |
4370aa4a | 1581 | save_arg(int); |
fef20d9c | 1582 | } |
4370aa4a LJ |
1583 | } |
1584 | } | |
fef20d9c | 1585 | |
7b9186f5 | 1586 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c | 1587 | #undef save_arg |
4370aa4a LJ |
1588 | } |
1589 | EXPORT_SYMBOL_GPL(vbin_printf); | |
1590 | ||
1591 | /** | |
1592 | * bstr_printf - Format a string from binary arguments and place it in a buffer | |
1593 | * @buf: The buffer to place the result into | |
1594 | * @size: The size of the buffer, including the trailing null space | |
1595 | * @fmt: The format string to use | |
1596 | * @bin_buf: Binary arguments for the format string | |
1597 | * | |
1598 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets | |
1599 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is | |
1600 | * a binary buffer that generated by vbin_printf. | |
1601 | * | |
1602 | * The format follows C99 vsnprintf, but has some extensions: | |
0efb4d20 | 1603 | * see vsnprintf comment for details. |
4370aa4a LJ |
1604 | * |
1605 | * The return value is the number of characters which would | |
1606 | * be generated for the given input, excluding the trailing | |
1607 | * '\0', as per ISO C99. If you want to have the exact | |
1608 | * number of characters written into @buf as return value | |
1609 | * (not including the trailing '\0'), use vscnprintf(). If the | |
1610 | * return is greater than or equal to @size, the resulting | |
1611 | * string is truncated. | |
1612 | */ | |
1613 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) | |
1614 | { | |
fef20d9c | 1615 | struct printf_spec spec = {0}; |
d4be151b AGR |
1616 | char *str, *end; |
1617 | const char *args = (const char *)bin_buf; | |
4370aa4a | 1618 | |
2f30b1f9 | 1619 | if (WARN_ON_ONCE((int) size < 0)) |
4370aa4a | 1620 | return 0; |
4370aa4a LJ |
1621 | |
1622 | str = buf; | |
1623 | end = buf + size; | |
1624 | ||
1625 | #define get_arg(type) \ | |
1626 | ({ \ | |
1627 | typeof(type) value; \ | |
1628 | if (sizeof(type) == 8) { \ | |
1629 | args = PTR_ALIGN(args, sizeof(u32)); \ | |
1630 | *(u32 *)&value = *(u32 *)args; \ | |
1631 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ | |
1632 | } else { \ | |
1633 | args = PTR_ALIGN(args, sizeof(type)); \ | |
1634 | value = *(typeof(type) *)args; \ | |
1635 | } \ | |
1636 | args += sizeof(type); \ | |
1637 | value; \ | |
1638 | }) | |
1639 | ||
1640 | /* Make sure end is always >= buf */ | |
1641 | if (end < buf) { | |
1642 | end = ((void *)-1); | |
1643 | size = end - buf; | |
1644 | } | |
1645 | ||
fef20d9c | 1646 | while (*fmt) { |
fef20d9c | 1647 | const char *old_fmt = fmt; |
d4be151b | 1648 | int read = format_decode(fmt, &spec); |
4370aa4a | 1649 | |
fef20d9c | 1650 | fmt += read; |
4370aa4a | 1651 | |
fef20d9c FW |
1652 | switch (spec.type) { |
1653 | case FORMAT_TYPE_NONE: { | |
1654 | int copy = read; | |
1655 | if (str < end) { | |
1656 | if (copy > end - str) | |
1657 | copy = end - str; | |
1658 | memcpy(str, old_fmt, copy); | |
4370aa4a | 1659 | } |
fef20d9c FW |
1660 | str += read; |
1661 | break; | |
4370aa4a LJ |
1662 | } |
1663 | ||
ed681a91 | 1664 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1665 | spec.field_width = get_arg(int); |
1666 | break; | |
4370aa4a | 1667 | |
fef20d9c FW |
1668 | case FORMAT_TYPE_PRECISION: |
1669 | spec.precision = get_arg(int); | |
1670 | break; | |
4370aa4a | 1671 | |
d4be151b AGR |
1672 | case FORMAT_TYPE_CHAR: { |
1673 | char c; | |
1674 | ||
fef20d9c FW |
1675 | if (!(spec.flags & LEFT)) { |
1676 | while (--spec.field_width > 0) { | |
4370aa4a LJ |
1677 | if (str < end) |
1678 | *str = ' '; | |
1679 | ++str; | |
1680 | } | |
1681 | } | |
1682 | c = (unsigned char) get_arg(char); | |
1683 | if (str < end) | |
1684 | *str = c; | |
1685 | ++str; | |
fef20d9c | 1686 | while (--spec.field_width > 0) { |
4370aa4a LJ |
1687 | if (str < end) |
1688 | *str = ' '; | |
1689 | ++str; | |
1690 | } | |
fef20d9c | 1691 | break; |
d4be151b | 1692 | } |
4370aa4a | 1693 | |
fef20d9c | 1694 | case FORMAT_TYPE_STR: { |
4370aa4a | 1695 | const char *str_arg = args; |
d4be151b | 1696 | args += strlen(str_arg) + 1; |
fef20d9c FW |
1697 | str = string(str, end, (char *)str_arg, spec); |
1698 | break; | |
4370aa4a LJ |
1699 | } |
1700 | ||
fef20d9c FW |
1701 | case FORMAT_TYPE_PTR: |
1702 | str = pointer(fmt+1, str, end, get_arg(void *), spec); | |
1703 | while (isalnum(*fmt)) | |
4370aa4a | 1704 | fmt++; |
fef20d9c | 1705 | break; |
4370aa4a | 1706 | |
fef20d9c | 1707 | case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c | 1708 | case FORMAT_TYPE_INVALID: |
4370aa4a LJ |
1709 | if (str < end) |
1710 | *str = '%'; | |
1711 | ++str; | |
fef20d9c FW |
1712 | break; |
1713 | ||
1714 | case FORMAT_TYPE_NRCHARS: | |
1715 | /* skip */ | |
1716 | break; | |
1717 | ||
d4be151b AGR |
1718 | default: { |
1719 | unsigned long long num; | |
1720 | ||
fef20d9c FW |
1721 | switch (spec.type) { |
1722 | ||
1723 | case FORMAT_TYPE_LONG_LONG: | |
1724 | num = get_arg(long long); | |
1725 | break; | |
1726 | case FORMAT_TYPE_ULONG: | |
fef20d9c FW |
1727 | case FORMAT_TYPE_LONG: |
1728 | num = get_arg(unsigned long); | |
1729 | break; | |
1730 | case FORMAT_TYPE_SIZE_T: | |
1731 | num = get_arg(size_t); | |
1732 | break; | |
1733 | case FORMAT_TYPE_PTRDIFF: | |
1734 | num = get_arg(ptrdiff_t); | |
1735 | break; | |
a4e94ef0 Z |
1736 | case FORMAT_TYPE_UBYTE: |
1737 | num = get_arg(unsigned char); | |
1738 | break; | |
1739 | case FORMAT_TYPE_BYTE: | |
1740 | num = get_arg(signed char); | |
1741 | break; | |
fef20d9c FW |
1742 | case FORMAT_TYPE_USHORT: |
1743 | num = get_arg(unsigned short); | |
1744 | break; | |
1745 | case FORMAT_TYPE_SHORT: | |
1746 | num = get_arg(short); | |
1747 | break; | |
1748 | case FORMAT_TYPE_UINT: | |
1749 | num = get_arg(unsigned int); | |
1750 | break; | |
1751 | default: | |
1752 | num = get_arg(int); | |
1753 | } | |
1754 | ||
1755 | str = number(str, end, num, spec); | |
d4be151b AGR |
1756 | } /* default: */ |
1757 | } /* switch(spec.type) */ | |
1758 | } /* while(*fmt) */ | |
fef20d9c | 1759 | |
4370aa4a LJ |
1760 | if (size > 0) { |
1761 | if (str < end) | |
1762 | *str = '\0'; | |
1763 | else | |
1764 | end[-1] = '\0'; | |
1765 | } | |
fef20d9c | 1766 | |
4370aa4a LJ |
1767 | #undef get_arg |
1768 | ||
1769 | /* the trailing null byte doesn't count towards the total */ | |
1770 | return str - buf; | |
1771 | } | |
1772 | EXPORT_SYMBOL_GPL(bstr_printf); | |
1773 | ||
1774 | /** | |
1775 | * bprintf - Parse a format string and place args' binary value in a buffer | |
1776 | * @bin_buf: The buffer to place args' binary value | |
1777 | * @size: The size of the buffer(by words(32bits), not characters) | |
1778 | * @fmt: The format string to use | |
1779 | * @...: Arguments for the format string | |
1780 | * | |
1781 | * The function returns the number of words(u32) written | |
1782 | * into @bin_buf. | |
1783 | */ | |
1784 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) | |
1785 | { | |
1786 | va_list args; | |
1787 | int ret; | |
1788 | ||
1789 | va_start(args, fmt); | |
1790 | ret = vbin_printf(bin_buf, size, fmt, args); | |
1791 | va_end(args); | |
7b9186f5 | 1792 | |
4370aa4a LJ |
1793 | return ret; |
1794 | } | |
1795 | EXPORT_SYMBOL_GPL(bprintf); | |
1796 | ||
1797 | #endif /* CONFIG_BINARY_PRINTF */ | |
1798 | ||
1da177e4 LT |
1799 | /** |
1800 | * vsscanf - Unformat a buffer into a list of arguments | |
1801 | * @buf: input buffer | |
1802 | * @fmt: format of buffer | |
1803 | * @args: arguments | |
1804 | */ | |
7b9186f5 | 1805 | int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4 LT |
1806 | { |
1807 | const char *str = buf; | |
1808 | char *next; | |
1809 | char digit; | |
1810 | int num = 0; | |
ef0658f3 JP |
1811 | u8 qualifier; |
1812 | u8 base; | |
1813 | s16 field_width; | |
d4be151b | 1814 | bool is_sign; |
1da177e4 | 1815 | |
7b9186f5 | 1816 | while (*fmt && *str) { |
1da177e4 LT |
1817 | /* skip any white space in format */ |
1818 | /* white space in format matchs any amount of | |
1819 | * white space, including none, in the input. | |
1820 | */ | |
1821 | if (isspace(*fmt)) { | |
e7d2860b AGR |
1822 | fmt = skip_spaces(++fmt); |
1823 | str = skip_spaces(str); | |
1da177e4 LT |
1824 | } |
1825 | ||
1826 | /* anything that is not a conversion must match exactly */ | |
1827 | if (*fmt != '%' && *fmt) { | |
1828 | if (*fmt++ != *str++) | |
1829 | break; | |
1830 | continue; | |
1831 | } | |
1832 | ||
1833 | if (!*fmt) | |
1834 | break; | |
1835 | ++fmt; | |
7b9186f5 | 1836 | |
1da177e4 LT |
1837 | /* skip this conversion. |
1838 | * advance both strings to next white space | |
1839 | */ | |
1840 | if (*fmt == '*') { | |
8fccae2c | 1841 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4 LT |
1842 | fmt++; |
1843 | while (!isspace(*str) && *str) | |
1844 | str++; | |
1845 | continue; | |
1846 | } | |
1847 | ||
1848 | /* get field width */ | |
1849 | field_width = -1; | |
1850 | if (isdigit(*fmt)) | |
1851 | field_width = skip_atoi(&fmt); | |
1852 | ||
1853 | /* get conversion qualifier */ | |
1854 | qualifier = -1; | |
08562cb2 AGR |
1855 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1856 | TOLOWER(*fmt) == 'z') { | |
1da177e4 LT |
1857 | qualifier = *fmt++; |
1858 | if (unlikely(qualifier == *fmt)) { | |
1859 | if (qualifier == 'h') { | |
1860 | qualifier = 'H'; | |
1861 | fmt++; | |
1862 | } else if (qualifier == 'l') { | |
1863 | qualifier = 'L'; | |
1864 | fmt++; | |
1865 | } | |
1866 | } | |
1867 | } | |
1da177e4 LT |
1868 | |
1869 | if (!*fmt || !*str) | |
1870 | break; | |
1871 | ||
d4be151b AGR |
1872 | base = 10; |
1873 | is_sign = 0; | |
1874 | ||
7b9186f5 | 1875 | switch (*fmt++) { |
1da177e4 LT |
1876 | case 'c': |
1877 | { | |
7b9186f5 | 1878 | char *s = (char *)va_arg(args, char*); |
1da177e4 LT |
1879 | if (field_width == -1) |
1880 | field_width = 1; | |
1881 | do { | |
1882 | *s++ = *str++; | |
1883 | } while (--field_width > 0 && *str); | |
1884 | num++; | |
1885 | } | |
1886 | continue; | |
1887 | case 's': | |
1888 | { | |
7b9186f5 AGR |
1889 | char *s = (char *)va_arg(args, char *); |
1890 | if (field_width == -1) | |
4be929be | 1891 | field_width = SHRT_MAX; |
1da177e4 | 1892 | /* first, skip leading white space in buffer */ |
e7d2860b | 1893 | str = skip_spaces(str); |
1da177e4 LT |
1894 | |
1895 | /* now copy until next white space */ | |
7b9186f5 | 1896 | while (*str && !isspace(*str) && field_width--) |
1da177e4 | 1897 | *s++ = *str++; |
1da177e4 LT |
1898 | *s = '\0'; |
1899 | num++; | |
1900 | } | |
1901 | continue; | |
1902 | case 'n': | |
1903 | /* return number of characters read so far */ | |
1904 | { | |
7b9186f5 | 1905 | int *i = (int *)va_arg(args, int*); |
1da177e4 LT |
1906 | *i = str - buf; |
1907 | } | |
1908 | continue; | |
1909 | case 'o': | |
1910 | base = 8; | |
1911 | break; | |
1912 | case 'x': | |
1913 | case 'X': | |
1914 | base = 16; | |
1915 | break; | |
1916 | case 'i': | |
7b9186f5 | 1917 | base = 0; |
1da177e4 LT |
1918 | case 'd': |
1919 | is_sign = 1; | |
1920 | case 'u': | |
1921 | break; | |
1922 | case '%': | |
1923 | /* looking for '%' in str */ | |
7b9186f5 | 1924 | if (*str++ != '%') |
1da177e4 LT |
1925 | return num; |
1926 | continue; | |
1927 | default: | |
1928 | /* invalid format; stop here */ | |
1929 | return num; | |
1930 | } | |
1931 | ||
1932 | /* have some sort of integer conversion. | |
1933 | * first, skip white space in buffer. | |
1934 | */ | |
e7d2860b | 1935 | str = skip_spaces(str); |
1da177e4 LT |
1936 | |
1937 | digit = *str; | |
1938 | if (is_sign && digit == '-') | |
1939 | digit = *(str + 1); | |
1940 | ||
1941 | if (!digit | |
7b9186f5 AGR |
1942 | || (base == 16 && !isxdigit(digit)) |
1943 | || (base == 10 && !isdigit(digit)) | |
1944 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
1945 | || (base == 0 && !isdigit(digit))) | |
1946 | break; | |
1da177e4 | 1947 | |
7b9186f5 | 1948 | switch (qualifier) { |
1da177e4 LT |
1949 | case 'H': /* that's 'hh' in format */ |
1950 | if (is_sign) { | |
7b9186f5 AGR |
1951 | signed char *s = (signed char *)va_arg(args, signed char *); |
1952 | *s = (signed char)simple_strtol(str, &next, base); | |
1da177e4 | 1953 | } else { |
7b9186f5 AGR |
1954 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
1955 | *s = (unsigned char)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1956 | } |
1957 | break; | |
1958 | case 'h': | |
1959 | if (is_sign) { | |
7b9186f5 AGR |
1960 | short *s = (short *)va_arg(args, short *); |
1961 | *s = (short)simple_strtol(str, &next, base); | |
1da177e4 | 1962 | } else { |
7b9186f5 AGR |
1963 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
1964 | *s = (unsigned short)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1965 | } |
1966 | break; | |
1967 | case 'l': | |
1968 | if (is_sign) { | |
7b9186f5 AGR |
1969 | long *l = (long *)va_arg(args, long *); |
1970 | *l = simple_strtol(str, &next, base); | |
1da177e4 | 1971 | } else { |
7b9186f5 AGR |
1972 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
1973 | *l = simple_strtoul(str, &next, base); | |
1da177e4 LT |
1974 | } |
1975 | break; | |
1976 | case 'L': | |
1977 | if (is_sign) { | |
7b9186f5 AGR |
1978 | long long *l = (long long *)va_arg(args, long long *); |
1979 | *l = simple_strtoll(str, &next, base); | |
1da177e4 | 1980 | } else { |
7b9186f5 AGR |
1981 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
1982 | *l = simple_strtoull(str, &next, base); | |
1da177e4 LT |
1983 | } |
1984 | break; | |
1985 | case 'Z': | |
1986 | case 'z': | |
1987 | { | |
7b9186f5 AGR |
1988 | size_t *s = (size_t *)va_arg(args, size_t *); |
1989 | *s = (size_t)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1990 | } |
1991 | break; | |
1992 | default: | |
1993 | if (is_sign) { | |
7b9186f5 AGR |
1994 | int *i = (int *)va_arg(args, int *); |
1995 | *i = (int)simple_strtol(str, &next, base); | |
1da177e4 | 1996 | } else { |
7b9186f5 AGR |
1997 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
1998 | *i = (unsigned int)simple_strtoul(str, &next, base); | |
1da177e4 LT |
1999 | } |
2000 | break; | |
2001 | } | |
2002 | num++; | |
2003 | ||
2004 | if (!next) | |
2005 | break; | |
2006 | str = next; | |
2007 | } | |
c6b40d16 JB |
2008 | |
2009 | /* | |
2010 | * Now we've come all the way through so either the input string or the | |
2011 | * format ended. In the former case, there can be a %n at the current | |
2012 | * position in the format that needs to be filled. | |
2013 | */ | |
2014 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
2015 | int *p = (int *)va_arg(args, int *); | |
2016 | *p = str - buf; | |
2017 | } | |
2018 | ||
1da177e4 LT |
2019 | return num; |
2020 | } | |
1da177e4 LT |
2021 | EXPORT_SYMBOL(vsscanf); |
2022 | ||
2023 | /** | |
2024 | * sscanf - Unformat a buffer into a list of arguments | |
2025 | * @buf: input buffer | |
2026 | * @fmt: formatting of buffer | |
2027 | * @...: resulting arguments | |
2028 | */ | |
7b9186f5 | 2029 | int sscanf(const char *buf, const char *fmt, ...) |
1da177e4 LT |
2030 | { |
2031 | va_list args; | |
2032 | int i; | |
2033 | ||
7b9186f5 AGR |
2034 | va_start(args, fmt); |
2035 | i = vsscanf(buf, fmt, args); | |
1da177e4 | 2036 | va_end(args); |
7b9186f5 | 2037 | |
1da177e4 LT |
2038 | return i; |
2039 | } | |
1da177e4 | 2040 | EXPORT_SYMBOL(sscanf); |