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 | |
aa46a63e HH |
34 | static unsigned int simple_guess_base(const char *cp) |
35 | { | |
36 | if (cp[0] == '0') { | |
75fb8f26 | 37 | if (_tolower(cp[1]) == 'x' && isxdigit(cp[2])) |
aa46a63e HH |
38 | return 16; |
39 | else | |
40 | return 8; | |
41 | } else { | |
42 | return 10; | |
43 | } | |
44 | } | |
45 | ||
1da177e4 | 46 | /** |
922ac25c | 47 | * simple_strtoull - convert a string to an unsigned long long |
1da177e4 LT |
48 | * @cp: The start of the string |
49 | * @endp: A pointer to the end of the parsed string will be placed here | |
50 | * @base: The number base to use | |
51 | */ | |
922ac25c | 52 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
1da177e4 | 53 | { |
922ac25c | 54 | unsigned long long result = 0; |
aa46a63e HH |
55 | |
56 | if (!base) | |
57 | base = simple_guess_base(cp); | |
58 | ||
75fb8f26 | 59 | if (base == 16 && cp[0] == '0' && _tolower(cp[1]) == 'x') |
aa46a63e HH |
60 | cp += 2; |
61 | ||
62 | while (isxdigit(*cp)) { | |
63 | unsigned int value; | |
64 | ||
75fb8f26 | 65 | value = isdigit(*cp) ? *cp - '0' : _tolower(*cp) - 'a' + 10; |
aa46a63e HH |
66 | if (value >= base) |
67 | break; | |
68 | result = result * base + value; | |
1da177e4 LT |
69 | cp++; |
70 | } | |
71 | if (endp) | |
72 | *endp = (char *)cp; | |
7b9186f5 | 73 | |
1da177e4 LT |
74 | return result; |
75 | } | |
922ac25c | 76 | EXPORT_SYMBOL(simple_strtoull); |
1da177e4 LT |
77 | |
78 | /** | |
922ac25c | 79 | * simple_strtoul - convert a string to an unsigned long |
1da177e4 LT |
80 | * @cp: The start of the string |
81 | * @endp: A pointer to the end of the parsed string will be placed here | |
82 | * @base: The number base to use | |
83 | */ | |
922ac25c | 84 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
1da177e4 | 85 | { |
922ac25c | 86 | return simple_strtoull(cp, endp, base); |
1da177e4 | 87 | } |
922ac25c | 88 | EXPORT_SYMBOL(simple_strtoul); |
1da177e4 LT |
89 | |
90 | /** | |
922ac25c | 91 | * simple_strtol - convert a string to a signed long |
1da177e4 LT |
92 | * @cp: The start of the string |
93 | * @endp: A pointer to the end of the parsed string will be placed here | |
94 | * @base: The number base to use | |
95 | */ | |
922ac25c | 96 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
1da177e4 | 97 | { |
922ac25c AGR |
98 | if (*cp == '-') |
99 | return -simple_strtoul(cp + 1, endp, base); | |
7b9186f5 | 100 | |
922ac25c | 101 | return simple_strtoul(cp, endp, base); |
1da177e4 | 102 | } |
922ac25c | 103 | EXPORT_SYMBOL(simple_strtol); |
1da177e4 LT |
104 | |
105 | /** | |
106 | * simple_strtoll - convert a string to a signed long long | |
107 | * @cp: The start of the string | |
108 | * @endp: A pointer to the end of the parsed string will be placed here | |
109 | * @base: The number base to use | |
110 | */ | |
22d27051 | 111 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
1da177e4 | 112 | { |
7b9186f5 | 113 | if (*cp == '-') |
22d27051 | 114 | return -simple_strtoull(cp + 1, endp, base); |
7b9186f5 | 115 | |
22d27051 | 116 | return simple_strtoull(cp, endp, base); |
1da177e4 | 117 | } |
98d5ce0d | 118 | EXPORT_SYMBOL(simple_strtoll); |
1da177e4 | 119 | |
cf3b429b JP |
120 | static noinline_for_stack |
121 | int skip_atoi(const char **s) | |
1da177e4 | 122 | { |
7b9186f5 | 123 | int i = 0; |
1da177e4 LT |
124 | |
125 | while (isdigit(**s)) | |
126 | i = i*10 + *((*s)++) - '0'; | |
7b9186f5 | 127 | |
1da177e4 LT |
128 | return i; |
129 | } | |
130 | ||
4277eedd DV |
131 | /* Decimal conversion is by far the most typical, and is used |
132 | * for /proc and /sys data. This directly impacts e.g. top performance | |
133 | * with many processes running. We optimize it for speed | |
134 | * using code from | |
135 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
136 | * (with permission from the author, Douglas W. Jones). */ | |
137 | ||
138 | /* Formats correctly any integer in [0,99999]. | |
139 | * Outputs from one to five digits depending on input. | |
140 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
cf3b429b JP |
141 | static noinline_for_stack |
142 | char *put_dec_trunc(char *buf, unsigned q) | |
4277eedd DV |
143 | { |
144 | unsigned d3, d2, d1, d0; | |
145 | d1 = (q>>4) & 0xf; | |
146 | d2 = (q>>8) & 0xf; | |
147 | d3 = (q>>12); | |
148 | ||
149 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
150 | q = (d0 * 0xcd) >> 11; | |
151 | d0 = d0 - 10*q; | |
152 | *buf++ = d0 + '0'; /* least significant digit */ | |
153 | d1 = q + 9*d3 + 5*d2 + d1; | |
154 | if (d1 != 0) { | |
155 | q = (d1 * 0xcd) >> 11; | |
156 | d1 = d1 - 10*q; | |
157 | *buf++ = d1 + '0'; /* next digit */ | |
158 | ||
159 | d2 = q + 2*d2; | |
160 | if ((d2 != 0) || (d3 != 0)) { | |
161 | q = (d2 * 0xd) >> 7; | |
162 | d2 = d2 - 10*q; | |
163 | *buf++ = d2 + '0'; /* next digit */ | |
164 | ||
165 | d3 = q + 4*d3; | |
166 | if (d3 != 0) { | |
167 | q = (d3 * 0xcd) >> 11; | |
168 | d3 = d3 - 10*q; | |
169 | *buf++ = d3 + '0'; /* next digit */ | |
170 | if (q != 0) | |
7b9186f5 | 171 | *buf++ = q + '0'; /* most sign. digit */ |
4277eedd DV |
172 | } |
173 | } | |
174 | } | |
7b9186f5 | 175 | |
4277eedd DV |
176 | return buf; |
177 | } | |
178 | /* Same with if's removed. Always emits five digits */ | |
cf3b429b JP |
179 | static noinline_for_stack |
180 | char *put_dec_full(char *buf, unsigned q) | |
4277eedd DV |
181 | { |
182 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
183 | /* but anyway, gcc produces better code with full-sized ints */ | |
184 | unsigned d3, d2, d1, d0; | |
185 | d1 = (q>>4) & 0xf; | |
186 | d2 = (q>>8) & 0xf; | |
187 | d3 = (q>>12); | |
188 | ||
7b9186f5 AGR |
189 | /* |
190 | * Possible ways to approx. divide by 10 | |
191 | * gcc -O2 replaces multiply with shifts and adds | |
192 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
193 | * (x * 0x67) >> 10: 1100111 | |
194 | * (x * 0x34) >> 9: 110100 - same | |
195 | * (x * 0x1a) >> 8: 11010 - same | |
196 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
197 | */ | |
4277eedd DV |
198 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
199 | q = (d0 * 0xcd) >> 11; | |
200 | d0 = d0 - 10*q; | |
201 | *buf++ = d0 + '0'; | |
202 | d1 = q + 9*d3 + 5*d2 + d1; | |
203 | q = (d1 * 0xcd) >> 11; | |
204 | d1 = d1 - 10*q; | |
205 | *buf++ = d1 + '0'; | |
206 | ||
207 | d2 = q + 2*d2; | |
208 | q = (d2 * 0xd) >> 7; | |
209 | d2 = d2 - 10*q; | |
210 | *buf++ = d2 + '0'; | |
211 | ||
212 | d3 = q + 4*d3; | |
213 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
214 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
215 | d3 = d3 - 10*q; | |
216 | *buf++ = d3 + '0'; | |
217 | *buf++ = q + '0'; | |
7b9186f5 | 218 | |
4277eedd DV |
219 | return buf; |
220 | } | |
221 | /* No inlining helps gcc to use registers better */ | |
cf3b429b JP |
222 | static noinline_for_stack |
223 | char *put_dec(char *buf, unsigned long long num) | |
4277eedd DV |
224 | { |
225 | while (1) { | |
226 | unsigned rem; | |
227 | if (num < 100000) | |
228 | return put_dec_trunc(buf, num); | |
229 | rem = do_div(num, 100000); | |
230 | buf = put_dec_full(buf, rem); | |
231 | } | |
232 | } | |
233 | ||
1da177e4 LT |
234 | #define ZEROPAD 1 /* pad with zero */ |
235 | #define SIGN 2 /* unsigned/signed long */ | |
236 | #define PLUS 4 /* show plus */ | |
237 | #define SPACE 8 /* space if plus */ | |
238 | #define LEFT 16 /* left justified */ | |
b89dc5d6 BH |
239 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
240 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ | |
1da177e4 | 241 | |
fef20d9c FW |
242 | enum format_type { |
243 | FORMAT_TYPE_NONE, /* Just a string part */ | |
ed681a91 | 244 | FORMAT_TYPE_WIDTH, |
fef20d9c FW |
245 | FORMAT_TYPE_PRECISION, |
246 | FORMAT_TYPE_CHAR, | |
247 | FORMAT_TYPE_STR, | |
248 | FORMAT_TYPE_PTR, | |
249 | FORMAT_TYPE_PERCENT_CHAR, | |
250 | FORMAT_TYPE_INVALID, | |
251 | FORMAT_TYPE_LONG_LONG, | |
252 | FORMAT_TYPE_ULONG, | |
253 | FORMAT_TYPE_LONG, | |
a4e94ef0 Z |
254 | FORMAT_TYPE_UBYTE, |
255 | FORMAT_TYPE_BYTE, | |
fef20d9c FW |
256 | FORMAT_TYPE_USHORT, |
257 | FORMAT_TYPE_SHORT, | |
258 | FORMAT_TYPE_UINT, | |
259 | FORMAT_TYPE_INT, | |
260 | FORMAT_TYPE_NRCHARS, | |
261 | FORMAT_TYPE_SIZE_T, | |
262 | FORMAT_TYPE_PTRDIFF | |
263 | }; | |
264 | ||
265 | struct printf_spec { | |
4e310fda | 266 | u8 type; /* format_type enum */ |
ef0658f3 | 267 | u8 flags; /* flags to number() */ |
4e310fda JP |
268 | u8 base; /* number base, 8, 10 or 16 only */ |
269 | u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ | |
270 | s16 field_width; /* width of output field */ | |
271 | s16 precision; /* # of digits/chars */ | |
fef20d9c FW |
272 | }; |
273 | ||
cf3b429b JP |
274 | static noinline_for_stack |
275 | char *number(char *buf, char *end, unsigned long long num, | |
276 | struct printf_spec spec) | |
1da177e4 | 277 | { |
9b706aee DV |
278 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
279 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ | |
280 | ||
281 | char tmp[66]; | |
282 | char sign; | |
283 | char locase; | |
fef20d9c | 284 | int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
1da177e4 LT |
285 | int i; |
286 | ||
9b706aee DV |
287 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
288 | * produces same digits or (maybe lowercased) letters */ | |
fef20d9c FW |
289 | locase = (spec.flags & SMALL); |
290 | if (spec.flags & LEFT) | |
291 | spec.flags &= ~ZEROPAD; | |
1da177e4 | 292 | sign = 0; |
fef20d9c | 293 | if (spec.flags & SIGN) { |
7b9186f5 | 294 | if ((signed long long)num < 0) { |
1da177e4 | 295 | sign = '-'; |
7b9186f5 | 296 | num = -(signed long long)num; |
fef20d9c FW |
297 | spec.field_width--; |
298 | } else if (spec.flags & PLUS) { | |
1da177e4 | 299 | sign = '+'; |
fef20d9c FW |
300 | spec.field_width--; |
301 | } else if (spec.flags & SPACE) { | |
1da177e4 | 302 | sign = ' '; |
fef20d9c | 303 | spec.field_width--; |
1da177e4 LT |
304 | } |
305 | } | |
b39a7340 | 306 | if (need_pfx) { |
fef20d9c FW |
307 | spec.field_width--; |
308 | if (spec.base == 16) | |
309 | spec.field_width--; | |
1da177e4 | 310 | } |
b39a7340 DV |
311 | |
312 | /* generate full string in tmp[], in reverse order */ | |
1da177e4 LT |
313 | i = 0; |
314 | if (num == 0) | |
b39a7340 | 315 | tmp[i++] = '0'; |
4277eedd DV |
316 | /* Generic code, for any base: |
317 | else do { | |
9b706aee | 318 | tmp[i++] = (digits[do_div(num,base)] | locase); |
4277eedd DV |
319 | } while (num != 0); |
320 | */ | |
fef20d9c FW |
321 | else if (spec.base != 10) { /* 8 or 16 */ |
322 | int mask = spec.base - 1; | |
b39a7340 | 323 | int shift = 3; |
7b9186f5 AGR |
324 | |
325 | if (spec.base == 16) | |
326 | shift = 4; | |
b39a7340 | 327 | do { |
9b706aee | 328 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
b39a7340 DV |
329 | num >>= shift; |
330 | } while (num); | |
4277eedd DV |
331 | } else { /* base 10 */ |
332 | i = put_dec(tmp, num) - tmp; | |
333 | } | |
b39a7340 DV |
334 | |
335 | /* printing 100 using %2d gives "100", not "00" */ | |
fef20d9c FW |
336 | if (i > spec.precision) |
337 | spec.precision = i; | |
b39a7340 | 338 | /* leading space padding */ |
fef20d9c FW |
339 | spec.field_width -= spec.precision; |
340 | if (!(spec.flags & (ZEROPAD+LEFT))) { | |
7b9186f5 | 341 | while (--spec.field_width >= 0) { |
f796937a | 342 | if (buf < end) |
1da177e4 LT |
343 | *buf = ' '; |
344 | ++buf; | |
345 | } | |
346 | } | |
b39a7340 | 347 | /* sign */ |
1da177e4 | 348 | if (sign) { |
f796937a | 349 | if (buf < end) |
1da177e4 LT |
350 | *buf = sign; |
351 | ++buf; | |
352 | } | |
b39a7340 DV |
353 | /* "0x" / "0" prefix */ |
354 | if (need_pfx) { | |
355 | if (buf < end) | |
356 | *buf = '0'; | |
357 | ++buf; | |
fef20d9c | 358 | if (spec.base == 16) { |
f796937a | 359 | if (buf < end) |
9b706aee | 360 | *buf = ('X' | locase); |
1da177e4 LT |
361 | ++buf; |
362 | } | |
363 | } | |
b39a7340 | 364 | /* zero or space padding */ |
fef20d9c FW |
365 | if (!(spec.flags & LEFT)) { |
366 | char c = (spec.flags & ZEROPAD) ? '0' : ' '; | |
367 | while (--spec.field_width >= 0) { | |
f796937a | 368 | if (buf < end) |
1da177e4 LT |
369 | *buf = c; |
370 | ++buf; | |
371 | } | |
372 | } | |
b39a7340 | 373 | /* hmm even more zero padding? */ |
fef20d9c | 374 | while (i <= --spec.precision) { |
f796937a | 375 | if (buf < end) |
1da177e4 LT |
376 | *buf = '0'; |
377 | ++buf; | |
378 | } | |
b39a7340 DV |
379 | /* actual digits of result */ |
380 | while (--i >= 0) { | |
f796937a | 381 | if (buf < end) |
1da177e4 LT |
382 | *buf = tmp[i]; |
383 | ++buf; | |
384 | } | |
b39a7340 | 385 | /* trailing space padding */ |
fef20d9c | 386 | while (--spec.field_width >= 0) { |
f796937a | 387 | if (buf < end) |
1da177e4 LT |
388 | *buf = ' '; |
389 | ++buf; | |
390 | } | |
7b9186f5 | 391 | |
1da177e4 LT |
392 | return buf; |
393 | } | |
394 | ||
cf3b429b JP |
395 | static noinline_for_stack |
396 | char *string(char *buf, char *end, const char *s, struct printf_spec spec) | |
0f9bfa56 LT |
397 | { |
398 | int len, i; | |
399 | ||
400 | if ((unsigned long)s < PAGE_SIZE) | |
0f4f81dc | 401 | s = "(null)"; |
0f9bfa56 | 402 | |
fef20d9c | 403 | len = strnlen(s, spec.precision); |
0f9bfa56 | 404 | |
fef20d9c FW |
405 | if (!(spec.flags & LEFT)) { |
406 | while (len < spec.field_width--) { | |
0f9bfa56 LT |
407 | if (buf < end) |
408 | *buf = ' '; | |
409 | ++buf; | |
410 | } | |
411 | } | |
412 | for (i = 0; i < len; ++i) { | |
413 | if (buf < end) | |
414 | *buf = *s; | |
415 | ++buf; ++s; | |
416 | } | |
fef20d9c | 417 | while (len < spec.field_width--) { |
0f9bfa56 LT |
418 | if (buf < end) |
419 | *buf = ' '; | |
420 | ++buf; | |
421 | } | |
7b9186f5 | 422 | |
0f9bfa56 LT |
423 | return buf; |
424 | } | |
425 | ||
cf3b429b JP |
426 | static noinline_for_stack |
427 | char *symbol_string(char *buf, char *end, void *ptr, | |
428 | struct printf_spec spec, char ext) | |
0fe1ef24 LT |
429 | { |
430 | unsigned long value = (unsigned long) ptr; | |
431 | #ifdef CONFIG_KALLSYMS | |
432 | char sym[KSYM_SYMBOL_LEN]; | |
0f77a8d3 NK |
433 | if (ext == 'B') |
434 | sprint_backtrace(sym, value); | |
435 | else if (ext != 'f' && ext != 's') | |
0c8b946e FW |
436 | sprint_symbol(sym, value); |
437 | else | |
438 | kallsyms_lookup(value, NULL, NULL, NULL, sym); | |
7b9186f5 | 439 | |
fef20d9c | 440 | return string(buf, end, sym, spec); |
0fe1ef24 | 441 | #else |
7b9186f5 | 442 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
443 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
444 | spec.base = 16; | |
7b9186f5 | 445 | |
fef20d9c | 446 | return number(buf, end, value, spec); |
0fe1ef24 LT |
447 | #endif |
448 | } | |
449 | ||
cf3b429b JP |
450 | static noinline_for_stack |
451 | char *resource_string(char *buf, char *end, struct resource *res, | |
452 | struct printf_spec spec, const char *fmt) | |
332d2e78 LT |
453 | { |
454 | #ifndef IO_RSRC_PRINTK_SIZE | |
28405372 | 455 | #define IO_RSRC_PRINTK_SIZE 6 |
332d2e78 LT |
456 | #endif |
457 | ||
458 | #ifndef MEM_RSRC_PRINTK_SIZE | |
28405372 | 459 | #define MEM_RSRC_PRINTK_SIZE 10 |
332d2e78 | 460 | #endif |
4da0b66c | 461 | static const struct printf_spec io_spec = { |
fef20d9c | 462 | .base = 16, |
4da0b66c | 463 | .field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c FW |
464 | .precision = -1, |
465 | .flags = SPECIAL | SMALL | ZEROPAD, | |
466 | }; | |
4da0b66c BH |
467 | static const struct printf_spec mem_spec = { |
468 | .base = 16, | |
469 | .field_width = MEM_RSRC_PRINTK_SIZE, | |
470 | .precision = -1, | |
471 | .flags = SPECIAL | SMALL | ZEROPAD, | |
472 | }; | |
0f4050c7 BH |
473 | static const struct printf_spec bus_spec = { |
474 | .base = 16, | |
475 | .field_width = 2, | |
476 | .precision = -1, | |
477 | .flags = SMALL | ZEROPAD, | |
478 | }; | |
4da0b66c | 479 | static const struct printf_spec dec_spec = { |
c91d3376 BH |
480 | .base = 10, |
481 | .precision = -1, | |
482 | .flags = 0, | |
483 | }; | |
4da0b66c | 484 | static const struct printf_spec str_spec = { |
fd95541e BH |
485 | .field_width = -1, |
486 | .precision = 10, | |
487 | .flags = LEFT, | |
488 | }; | |
4da0b66c | 489 | static const struct printf_spec flag_spec = { |
fd95541e BH |
490 | .base = 16, |
491 | .precision = -1, | |
492 | .flags = SPECIAL | SMALL, | |
493 | }; | |
c7dabef8 BH |
494 | |
495 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
496 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
497 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
498 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
9d7cca04 | 499 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
c7dabef8 BH |
500 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
501 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
502 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
503 | ||
332d2e78 | 504 | char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8 | 505 | int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c | 506 | const struct printf_spec *specp; |
332d2e78 LT |
507 | |
508 | *p++ = '['; | |
4da0b66c | 509 | if (res->flags & IORESOURCE_IO) { |
c7dabef8 | 510 | p = string(p, pend, "io ", str_spec); |
4da0b66c BH |
511 | specp = &io_spec; |
512 | } else if (res->flags & IORESOURCE_MEM) { | |
c7dabef8 | 513 | p = string(p, pend, "mem ", str_spec); |
4da0b66c BH |
514 | specp = &mem_spec; |
515 | } else if (res->flags & IORESOURCE_IRQ) { | |
c7dabef8 | 516 | p = string(p, pend, "irq ", str_spec); |
4da0b66c BH |
517 | specp = &dec_spec; |
518 | } else if (res->flags & IORESOURCE_DMA) { | |
c7dabef8 | 519 | p = string(p, pend, "dma ", str_spec); |
4da0b66c | 520 | specp = &dec_spec; |
0f4050c7 BH |
521 | } else if (res->flags & IORESOURCE_BUS) { |
522 | p = string(p, pend, "bus ", str_spec); | |
523 | specp = &bus_spec; | |
4da0b66c | 524 | } else { |
c7dabef8 | 525 | p = string(p, pend, "??? ", str_spec); |
4da0b66c | 526 | specp = &mem_spec; |
c7dabef8 | 527 | decode = 0; |
fd95541e | 528 | } |
4da0b66c | 529 | p = number(p, pend, res->start, *specp); |
c91d3376 BH |
530 | if (res->start != res->end) { |
531 | *p++ = '-'; | |
4da0b66c | 532 | p = number(p, pend, res->end, *specp); |
c91d3376 | 533 | } |
c7dabef8 | 534 | if (decode) { |
fd95541e BH |
535 | if (res->flags & IORESOURCE_MEM_64) |
536 | p = string(p, pend, " 64bit", str_spec); | |
537 | if (res->flags & IORESOURCE_PREFETCH) | |
538 | p = string(p, pend, " pref", str_spec); | |
9d7cca04 BH |
539 | if (res->flags & IORESOURCE_WINDOW) |
540 | p = string(p, pend, " window", str_spec); | |
fd95541e BH |
541 | if (res->flags & IORESOURCE_DISABLED) |
542 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
543 | } else { |
544 | p = string(p, pend, " flags ", str_spec); | |
545 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 546 | } |
332d2e78 | 547 | *p++ = ']'; |
c7dabef8 | 548 | *p = '\0'; |
332d2e78 | 549 | |
fef20d9c | 550 | return string(buf, end, sym, spec); |
332d2e78 LT |
551 | } |
552 | ||
cf3b429b JP |
553 | static noinline_for_stack |
554 | char *mac_address_string(char *buf, char *end, u8 *addr, | |
555 | struct printf_spec spec, const char *fmt) | |
dd45c9cf | 556 | { |
8a27f7c9 | 557 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
558 | char *p = mac_addr; |
559 | int i; | |
bc7259a2 JP |
560 | char separator; |
561 | ||
562 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
563 | separator = '-'; |
564 | } else { | |
bc7259a2 JP |
565 | separator = ':'; |
566 | } | |
dd45c9cf HH |
567 | |
568 | for (i = 0; i < 6; i++) { | |
c8e00060 | 569 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 570 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 571 | *p++ = separator; |
dd45c9cf HH |
572 | } |
573 | *p = '\0'; | |
574 | ||
fef20d9c | 575 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
576 | } |
577 | ||
cf3b429b JP |
578 | static noinline_for_stack |
579 | char *ip4_string(char *p, const u8 *addr, const char *fmt) | |
8a27f7c9 JP |
580 | { |
581 | int i; | |
0159f24e JP |
582 | bool leading_zeros = (fmt[0] == 'i'); |
583 | int index; | |
584 | int step; | |
585 | ||
586 | switch (fmt[2]) { | |
587 | case 'h': | |
588 | #ifdef __BIG_ENDIAN | |
589 | index = 0; | |
590 | step = 1; | |
591 | #else | |
592 | index = 3; | |
593 | step = -1; | |
594 | #endif | |
595 | break; | |
596 | case 'l': | |
597 | index = 3; | |
598 | step = -1; | |
599 | break; | |
600 | case 'n': | |
601 | case 'b': | |
602 | default: | |
603 | index = 0; | |
604 | step = 1; | |
605 | break; | |
606 | } | |
8a27f7c9 JP |
607 | for (i = 0; i < 4; i++) { |
608 | char temp[3]; /* hold each IP quad in reverse order */ | |
0159f24e | 609 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c9 JP |
610 | if (leading_zeros) { |
611 | if (digits < 3) | |
612 | *p++ = '0'; | |
613 | if (digits < 2) | |
614 | *p++ = '0'; | |
615 | } | |
616 | /* reverse the digits in the quad */ | |
617 | while (digits--) | |
618 | *p++ = temp[digits]; | |
619 | if (i < 3) | |
620 | *p++ = '.'; | |
0159f24e | 621 | index += step; |
8a27f7c9 | 622 | } |
8a27f7c9 | 623 | *p = '\0'; |
7b9186f5 | 624 | |
8a27f7c9 JP |
625 | return p; |
626 | } | |
627 | ||
cf3b429b JP |
628 | static noinline_for_stack |
629 | char *ip6_compressed_string(char *p, const char *addr) | |
689afa7d | 630 | { |
7b9186f5 | 631 | int i, j, range; |
8a27f7c9 JP |
632 | unsigned char zerolength[8]; |
633 | int longest = 1; | |
634 | int colonpos = -1; | |
635 | u16 word; | |
7b9186f5 | 636 | u8 hi, lo; |
8a27f7c9 | 637 | bool needcolon = false; |
eb78cd26 JP |
638 | bool useIPv4; |
639 | struct in6_addr in6; | |
640 | ||
641 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
642 | ||
643 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
644 | |
645 | memset(zerolength, 0, sizeof(zerolength)); | |
646 | ||
647 | if (useIPv4) | |
648 | range = 6; | |
649 | else | |
650 | range = 8; | |
651 | ||
652 | /* find position of longest 0 run */ | |
653 | for (i = 0; i < range; i++) { | |
654 | for (j = i; j < range; j++) { | |
eb78cd26 | 655 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
656 | break; |
657 | zerolength[i]++; | |
658 | } | |
659 | } | |
660 | for (i = 0; i < range; i++) { | |
661 | if (zerolength[i] > longest) { | |
662 | longest = zerolength[i]; | |
663 | colonpos = i; | |
664 | } | |
665 | } | |
29cf519e JP |
666 | if (longest == 1) /* don't compress a single 0 */ |
667 | colonpos = -1; | |
689afa7d | 668 | |
8a27f7c9 JP |
669 | /* emit address */ |
670 | for (i = 0; i < range; i++) { | |
671 | if (i == colonpos) { | |
672 | if (needcolon || i == 0) | |
673 | *p++ = ':'; | |
674 | *p++ = ':'; | |
675 | needcolon = false; | |
676 | i += longest - 1; | |
677 | continue; | |
678 | } | |
679 | if (needcolon) { | |
680 | *p++ = ':'; | |
681 | needcolon = false; | |
682 | } | |
683 | /* hex u16 without leading 0s */ | |
eb78cd26 | 684 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
685 | hi = word >> 8; |
686 | lo = word & 0xff; | |
687 | if (hi) { | |
688 | if (hi > 0x0f) | |
689 | p = pack_hex_byte(p, hi); | |
690 | else | |
691 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 692 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 693 | } |
b5ff992b | 694 | else if (lo > 0x0f) |
8a27f7c9 JP |
695 | p = pack_hex_byte(p, lo); |
696 | else | |
697 | *p++ = hex_asc_lo(lo); | |
698 | needcolon = true; | |
699 | } | |
700 | ||
701 | if (useIPv4) { | |
702 | if (needcolon) | |
703 | *p++ = ':'; | |
0159f24e | 704 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c9 | 705 | } |
8a27f7c9 | 706 | *p = '\0'; |
7b9186f5 | 707 | |
8a27f7c9 JP |
708 | return p; |
709 | } | |
710 | ||
cf3b429b JP |
711 | static noinline_for_stack |
712 | char *ip6_string(char *p, const char *addr, const char *fmt) | |
8a27f7c9 JP |
713 | { |
714 | int i; | |
7b9186f5 | 715 | |
689afa7d | 716 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
717 | p = pack_hex_byte(p, *addr++); |
718 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 719 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
720 | *p++ = ':'; |
721 | } | |
722 | *p = '\0'; | |
7b9186f5 | 723 | |
8a27f7c9 JP |
724 | return p; |
725 | } | |
726 | ||
cf3b429b JP |
727 | static noinline_for_stack |
728 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
729 | struct printf_spec spec, const char *fmt) | |
8a27f7c9 JP |
730 | { |
731 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
732 | ||
733 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 734 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 735 | else |
eb78cd26 | 736 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 737 | |
fef20d9c | 738 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
739 | } |
740 | ||
cf3b429b JP |
741 | static noinline_for_stack |
742 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, | |
743 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 744 | { |
8a27f7c9 | 745 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 746 | |
0159f24e | 747 | ip4_string(ip4_addr, addr, fmt); |
4aa99606 | 748 | |
fef20d9c | 749 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
750 | } |
751 | ||
cf3b429b JP |
752 | static noinline_for_stack |
753 | char *uuid_string(char *buf, char *end, const u8 *addr, | |
754 | struct printf_spec spec, const char *fmt) | |
9ac6e44e JP |
755 | { |
756 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
757 | char *p = uuid; | |
758 | int i; | |
759 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
760 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
761 | const u8 *index = be; | |
762 | bool uc = false; | |
763 | ||
764 | switch (*(++fmt)) { | |
765 | case 'L': | |
766 | uc = true; /* fall-through */ | |
767 | case 'l': | |
768 | index = le; | |
769 | break; | |
770 | case 'B': | |
771 | uc = true; | |
772 | break; | |
773 | } | |
774 | ||
775 | for (i = 0; i < 16; i++) { | |
776 | p = pack_hex_byte(p, addr[index[i]]); | |
777 | switch (i) { | |
778 | case 3: | |
779 | case 5: | |
780 | case 7: | |
781 | case 9: | |
782 | *p++ = '-'; | |
783 | break; | |
784 | } | |
785 | } | |
786 | ||
787 | *p = 0; | |
788 | ||
789 | if (uc) { | |
790 | p = uuid; | |
791 | do { | |
792 | *p = toupper(*p); | |
793 | } while (*(++p)); | |
794 | } | |
795 | ||
796 | return string(buf, end, uuid, spec); | |
797 | } | |
798 | ||
411f05f1 | 799 | int kptr_restrict __read_mostly; |
455cd5ab | 800 | |
4d8a743c LT |
801 | /* |
802 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
803 | * by an extra set of alphanumeric characters that are extended format | |
804 | * specifiers. | |
805 | * | |
332d2e78 LT |
806 | * Right now we handle: |
807 | * | |
0c8b946e FW |
808 | * - 'F' For symbolic function descriptor pointers with offset |
809 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
810 | * - 'S' For symbolic direct pointers with offset |
811 | * - 's' For symbolic direct pointers without offset | |
0f77a8d3 | 812 | * - 'B' For backtraced symbolic direct pointers with offset |
c7dabef8 BH |
813 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
814 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
815 | * - 'M' For a 6-byte MAC address, it prints the address in the |
816 | * usual colon-separated hex notation | |
8a27f7c9 | 817 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 818 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 819 | * with a dash-separated hex notation |
8a27f7c9 JP |
820 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
821 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
822 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
823 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
824 | * IPv6 omits the colons (01020304...0f) | |
825 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
0159f24e | 826 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c9 | 827 | * - 'I6c' for IPv6 addresses printed as specified by |
29cf519e | 828 | * http://tools.ietf.org/html/rfc5952 |
9ac6e44e JP |
829 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
830 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
831 | * Options for %pU are: | |
832 | * b big endian lower case hex (default) | |
833 | * B big endian UPPER case hex | |
834 | * l little endian lower case hex | |
835 | * L little endian UPPER case hex | |
836 | * big endian output byte order is: | |
837 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
838 | * little endian output byte order is: | |
839 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
7db6f5fb JP |
840 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
841 | * call vsnprintf(->format, *->va_list). | |
842 | * Implements a "recursive vsnprintf". | |
843 | * Do not use this feature without some mechanism to verify the | |
844 | * correctness of the format string and va_list arguments. | |
455cd5ab | 845 | * - 'K' For a kernel pointer that should be hidden from unprivileged users |
9ac6e44e | 846 | * |
332d2e78 LT |
847 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
848 | * function pointers are really function descriptors, which contain a | |
849 | * pointer to the real address. | |
4d8a743c | 850 | */ |
cf3b429b JP |
851 | static noinline_for_stack |
852 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, | |
853 | struct printf_spec spec) | |
78a8bf69 | 854 | { |
9f36e2c4 | 855 | if (!ptr && *fmt != 'K') { |
5e057981 JP |
856 | /* |
857 | * Print (null) with the same width as a pointer so it makes | |
858 | * tabular output look nice. | |
859 | */ | |
860 | if (spec.field_width == -1) | |
861 | spec.field_width = 2 * sizeof(void *); | |
fef20d9c | 862 | return string(buf, end, "(null)", spec); |
5e057981 | 863 | } |
d97106ab | 864 | |
0fe1ef24 LT |
865 | switch (*fmt) { |
866 | case 'F': | |
0c8b946e | 867 | case 'f': |
0fe1ef24 LT |
868 | ptr = dereference_function_descriptor(ptr); |
869 | /* Fallthrough */ | |
870 | case 'S': | |
9ac6e44e | 871 | case 's': |
0f77a8d3 | 872 | case 'B': |
0c8b946e | 873 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 874 | case 'R': |
c7dabef8 | 875 | case 'r': |
fd95541e | 876 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
877 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
878 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 879 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
880 | return mac_address_string(buf, end, ptr, spec, fmt); |
881 | case 'I': /* Formatted IP supported | |
882 | * 4: 1.2.3.4 | |
883 | * 6: 0001:0203:...:0708 | |
884 | * 6c: 1::708 or 1::1.2.3.4 | |
885 | */ | |
886 | case 'i': /* Contiguous: | |
887 | * 4: 001.002.003.004 | |
888 | * 6: 000102...0f | |
889 | */ | |
890 | switch (fmt[1]) { | |
891 | case '6': | |
892 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
893 | case '4': | |
894 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
895 | } | |
fef20d9c | 896 | break; |
9ac6e44e JP |
897 | case 'U': |
898 | return uuid_string(buf, end, ptr, spec, fmt); | |
7db6f5fb | 899 | case 'V': |
d9be9b90 | 900 | return buf + vsnprintf(buf, end > buf ? end - buf : 0, |
7db6f5fb JP |
901 | ((struct va_format *)ptr)->fmt, |
902 | *(((struct va_format *)ptr)->va)); | |
455cd5ab DR |
903 | case 'K': |
904 | /* | |
905 | * %pK cannot be used in IRQ context because its test | |
906 | * for CAP_SYSLOG would be meaningless. | |
907 | */ | |
908 | if (in_irq() || in_serving_softirq() || in_nmi()) { | |
909 | if (spec.field_width == -1) | |
910 | spec.field_width = 2 * sizeof(void *); | |
911 | return string(buf, end, "pK-error", spec); | |
455cd5ab | 912 | } |
26297607 JP |
913 | if (!((kptr_restrict == 0) || |
914 | (kptr_restrict == 1 && | |
915 | has_capability_noaudit(current, CAP_SYSLOG)))) | |
916 | ptr = NULL; | |
917 | break; | |
fef20d9c FW |
918 | } |
919 | spec.flags |= SMALL; | |
920 | if (spec.field_width == -1) { | |
5e057981 | 921 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
922 | spec.flags |= ZEROPAD; |
923 | } | |
924 | spec.base = 16; | |
925 | ||
926 | return number(buf, end, (unsigned long) ptr, spec); | |
927 | } | |
928 | ||
929 | /* | |
930 | * Helper function to decode printf style format. | |
931 | * Each call decode a token from the format and return the | |
932 | * number of characters read (or likely the delta where it wants | |
933 | * to go on the next call). | |
934 | * The decoded token is returned through the parameters | |
935 | * | |
936 | * 'h', 'l', or 'L' for integer fields | |
937 | * 'z' support added 23/7/1999 S.H. | |
938 | * 'z' changed to 'Z' --davidm 1/25/99 | |
939 | * 't' added for ptrdiff_t | |
940 | * | |
941 | * @fmt: the format string | |
942 | * @type of the token returned | |
943 | * @flags: various flags such as +, -, # tokens.. | |
944 | * @field_width: overwritten width | |
945 | * @base: base of the number (octal, hex, ...) | |
946 | * @precision: precision of a number | |
947 | * @qualifier: qualifier of a number (long, size_t, ...) | |
948 | */ | |
cf3b429b JP |
949 | static noinline_for_stack |
950 | int format_decode(const char *fmt, struct printf_spec *spec) | |
fef20d9c FW |
951 | { |
952 | const char *start = fmt; | |
fef20d9c FW |
953 | |
954 | /* we finished early by reading the field width */ | |
ed681a91 | 955 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
956 | if (spec->field_width < 0) { |
957 | spec->field_width = -spec->field_width; | |
958 | spec->flags |= LEFT; | |
959 | } | |
960 | spec->type = FORMAT_TYPE_NONE; | |
961 | goto precision; | |
962 | } | |
963 | ||
964 | /* we finished early by reading the precision */ | |
965 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
966 | if (spec->precision < 0) | |
967 | spec->precision = 0; | |
968 | ||
969 | spec->type = FORMAT_TYPE_NONE; | |
970 | goto qualifier; | |
971 | } | |
972 | ||
973 | /* By default */ | |
974 | spec->type = FORMAT_TYPE_NONE; | |
975 | ||
976 | for (; *fmt ; ++fmt) { | |
977 | if (*fmt == '%') | |
978 | break; | |
979 | } | |
980 | ||
981 | /* Return the current non-format string */ | |
982 | if (fmt != start || !*fmt) | |
983 | return fmt - start; | |
984 | ||
985 | /* Process flags */ | |
986 | spec->flags = 0; | |
987 | ||
988 | while (1) { /* this also skips first '%' */ | |
989 | bool found = true; | |
990 | ||
991 | ++fmt; | |
992 | ||
993 | switch (*fmt) { | |
994 | case '-': spec->flags |= LEFT; break; | |
995 | case '+': spec->flags |= PLUS; break; | |
996 | case ' ': spec->flags |= SPACE; break; | |
997 | case '#': spec->flags |= SPECIAL; break; | |
998 | case '0': spec->flags |= ZEROPAD; break; | |
999 | default: found = false; | |
1000 | } | |
1001 | ||
1002 | if (!found) | |
1003 | break; | |
1004 | } | |
1005 | ||
1006 | /* get field width */ | |
1007 | spec->field_width = -1; | |
1008 | ||
1009 | if (isdigit(*fmt)) | |
1010 | spec->field_width = skip_atoi(&fmt); | |
1011 | else if (*fmt == '*') { | |
1012 | /* it's the next argument */ | |
ed681a91 | 1013 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1014 | return ++fmt - start; |
1015 | } | |
1016 | ||
1017 | precision: | |
1018 | /* get the precision */ | |
1019 | spec->precision = -1; | |
1020 | if (*fmt == '.') { | |
1021 | ++fmt; | |
1022 | if (isdigit(*fmt)) { | |
1023 | spec->precision = skip_atoi(&fmt); | |
1024 | if (spec->precision < 0) | |
1025 | spec->precision = 0; | |
1026 | } else if (*fmt == '*') { | |
1027 | /* it's the next argument */ | |
adf26f84 | 1028 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1029 | return ++fmt - start; |
1030 | } | |
1031 | } | |
1032 | ||
1033 | qualifier: | |
1034 | /* get the conversion qualifier */ | |
1035 | spec->qualifier = -1; | |
75fb8f26 AS |
1036 | if (*fmt == 'h' || _tolower(*fmt) == 'l' || |
1037 | _tolower(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1038 | spec->qualifier = *fmt++; |
1039 | if (unlikely(spec->qualifier == *fmt)) { | |
1040 | if (spec->qualifier == 'l') { | |
1041 | spec->qualifier = 'L'; | |
1042 | ++fmt; | |
1043 | } else if (spec->qualifier == 'h') { | |
1044 | spec->qualifier = 'H'; | |
1045 | ++fmt; | |
1046 | } | |
fef20d9c FW |
1047 | } |
1048 | } | |
1049 | ||
1050 | /* default base */ | |
1051 | spec->base = 10; | |
1052 | switch (*fmt) { | |
1053 | case 'c': | |
1054 | spec->type = FORMAT_TYPE_CHAR; | |
1055 | return ++fmt - start; | |
1056 | ||
1057 | case 's': | |
1058 | spec->type = FORMAT_TYPE_STR; | |
1059 | return ++fmt - start; | |
1060 | ||
1061 | case 'p': | |
1062 | spec->type = FORMAT_TYPE_PTR; | |
1063 | return fmt - start; | |
1064 | /* skip alnum */ | |
1065 | ||
1066 | case 'n': | |
1067 | spec->type = FORMAT_TYPE_NRCHARS; | |
1068 | return ++fmt - start; | |
1069 | ||
1070 | case '%': | |
1071 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1072 | return ++fmt - start; | |
1073 | ||
1074 | /* integer number formats - set up the flags and "break" */ | |
1075 | case 'o': | |
1076 | spec->base = 8; | |
1077 | break; | |
1078 | ||
1079 | case 'x': | |
1080 | spec->flags |= SMALL; | |
1081 | ||
1082 | case 'X': | |
1083 | spec->base = 16; | |
1084 | break; | |
1085 | ||
1086 | case 'd': | |
1087 | case 'i': | |
39e874f8 | 1088 | spec->flags |= SIGN; |
fef20d9c | 1089 | case 'u': |
4aa99606 | 1090 | break; |
fef20d9c FW |
1091 | |
1092 | default: | |
1093 | spec->type = FORMAT_TYPE_INVALID; | |
1094 | return fmt - start; | |
0fe1ef24 | 1095 | } |
fef20d9c FW |
1096 | |
1097 | if (spec->qualifier == 'L') | |
1098 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1099 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1100 | if (spec->flags & SIGN) |
fef20d9c FW |
1101 | spec->type = FORMAT_TYPE_LONG; |
1102 | else | |
1103 | spec->type = FORMAT_TYPE_ULONG; | |
75fb8f26 | 1104 | } else if (_tolower(spec->qualifier) == 'z') { |
fef20d9c FW |
1105 | spec->type = FORMAT_TYPE_SIZE_T; |
1106 | } else if (spec->qualifier == 't') { | |
1107 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1108 | } else if (spec->qualifier == 'H') { |
1109 | if (spec->flags & SIGN) | |
1110 | spec->type = FORMAT_TYPE_BYTE; | |
1111 | else | |
1112 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1113 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1114 | if (spec->flags & SIGN) |
fef20d9c FW |
1115 | spec->type = FORMAT_TYPE_SHORT; |
1116 | else | |
1117 | spec->type = FORMAT_TYPE_USHORT; | |
1118 | } else { | |
39e874f8 | 1119 | if (spec->flags & SIGN) |
fef20d9c FW |
1120 | spec->type = FORMAT_TYPE_INT; |
1121 | else | |
1122 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1123 | } |
fef20d9c FW |
1124 | |
1125 | return ++fmt - start; | |
78a8bf69 LT |
1126 | } |
1127 | ||
1da177e4 LT |
1128 | /** |
1129 | * vsnprintf - Format a string and place it in a buffer | |
1130 | * @buf: The buffer to place the result into | |
1131 | * @size: The size of the buffer, including the trailing null space | |
1132 | * @fmt: The format string to use | |
1133 | * @args: Arguments for the format string | |
1134 | * | |
20036fdc | 1135 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1136 | * %pS output the name of a text symbol with offset |
1137 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1138 | * %pF output the name of a function pointer with its offset |
1139 | * %pf output the name of a function pointer without its offset | |
0f77a8d3 | 1140 | * %pB output the name of a backtrace symbol with its offset |
8a79503a UKK |
1141 | * %pR output the address range in a struct resource with decoded flags |
1142 | * %pr output the address range in a struct resource with raw flags | |
1143 | * %pM output a 6-byte MAC address with colons | |
1144 | * %pm output a 6-byte MAC address without colons | |
1145 | * %pI4 print an IPv4 address without leading zeros | |
1146 | * %pi4 print an IPv4 address with leading zeros | |
1147 | * %pI6 print an IPv6 address with colons | |
1148 | * %pi6 print an IPv6 address without colons | |
f996f208 | 1149 | * %pI6c print an IPv6 address as specified by RFC 5952 |
8a79503a UKK |
1150 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
1151 | * case. | |
0efb4d20 | 1152 | * %n is ignored |
20036fdc | 1153 | * |
1da177e4 LT |
1154 | * The return value is the number of characters which would |
1155 | * be generated for the given input, excluding the trailing | |
1156 | * '\0', as per ISO C99. If you want to have the exact | |
1157 | * number of characters written into @buf as return value | |
72fd4a35 | 1158 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1159 | * return is greater than or equal to @size, the resulting |
1160 | * string is truncated. | |
1161 | * | |
ba1835eb | 1162 | * If you're not already dealing with a va_list consider using snprintf(). |
1da177e4 LT |
1163 | */ |
1164 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1165 | { | |
1da177e4 | 1166 | unsigned long long num; |
d4be151b | 1167 | char *str, *end; |
fef20d9c | 1168 | struct printf_spec spec = {0}; |
1da177e4 | 1169 | |
f796937a JF |
1170 | /* Reject out-of-range values early. Large positive sizes are |
1171 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1172 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1173 | return 0; |
1da177e4 LT |
1174 | |
1175 | str = buf; | |
f796937a | 1176 | end = buf + size; |
1da177e4 | 1177 | |
f796937a JF |
1178 | /* Make sure end is always >= buf */ |
1179 | if (end < buf) { | |
1180 | end = ((void *)-1); | |
1181 | size = end - buf; | |
1da177e4 LT |
1182 | } |
1183 | ||
fef20d9c FW |
1184 | while (*fmt) { |
1185 | const char *old_fmt = fmt; | |
d4be151b | 1186 | int read = format_decode(fmt, &spec); |
1da177e4 | 1187 | |
fef20d9c | 1188 | fmt += read; |
1da177e4 | 1189 | |
fef20d9c FW |
1190 | switch (spec.type) { |
1191 | case FORMAT_TYPE_NONE: { | |
1192 | int copy = read; | |
1193 | if (str < end) { | |
1194 | if (copy > end - str) | |
1195 | copy = end - str; | |
1196 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1197 | } |
fef20d9c FW |
1198 | str += read; |
1199 | break; | |
1da177e4 LT |
1200 | } |
1201 | ||
ed681a91 | 1202 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1203 | spec.field_width = va_arg(args, int); |
1204 | break; | |
1da177e4 | 1205 | |
fef20d9c FW |
1206 | case FORMAT_TYPE_PRECISION: |
1207 | spec.precision = va_arg(args, int); | |
1208 | break; | |
1da177e4 | 1209 | |
d4be151b AGR |
1210 | case FORMAT_TYPE_CHAR: { |
1211 | char c; | |
1212 | ||
fef20d9c FW |
1213 | if (!(spec.flags & LEFT)) { |
1214 | while (--spec.field_width > 0) { | |
f796937a | 1215 | if (str < end) |
1da177e4 LT |
1216 | *str = ' '; |
1217 | ++str; | |
1da177e4 | 1218 | |
fef20d9c FW |
1219 | } |
1220 | } | |
1221 | c = (unsigned char) va_arg(args, int); | |
1222 | if (str < end) | |
1223 | *str = c; | |
1224 | ++str; | |
1225 | while (--spec.field_width > 0) { | |
f796937a | 1226 | if (str < end) |
fef20d9c | 1227 | *str = ' '; |
1da177e4 | 1228 | ++str; |
fef20d9c FW |
1229 | } |
1230 | break; | |
d4be151b | 1231 | } |
1da177e4 | 1232 | |
fef20d9c FW |
1233 | case FORMAT_TYPE_STR: |
1234 | str = string(str, end, va_arg(args, char *), spec); | |
1235 | break; | |
1da177e4 | 1236 | |
fef20d9c FW |
1237 | case FORMAT_TYPE_PTR: |
1238 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1239 | spec); | |
1240 | while (isalnum(*fmt)) | |
1241 | fmt++; | |
1242 | break; | |
1da177e4 | 1243 | |
fef20d9c FW |
1244 | case FORMAT_TYPE_PERCENT_CHAR: |
1245 | if (str < end) | |
1246 | *str = '%'; | |
1247 | ++str; | |
1248 | break; | |
1da177e4 | 1249 | |
fef20d9c FW |
1250 | case FORMAT_TYPE_INVALID: |
1251 | if (str < end) | |
1252 | *str = '%'; | |
1253 | ++str; | |
fef20d9c FW |
1254 | break; |
1255 | ||
1256 | case FORMAT_TYPE_NRCHARS: { | |
ef0658f3 | 1257 | u8 qualifier = spec.qualifier; |
fef20d9c FW |
1258 | |
1259 | if (qualifier == 'l') { | |
1260 | long *ip = va_arg(args, long *); | |
1261 | *ip = (str - buf); | |
75fb8f26 | 1262 | } else if (_tolower(qualifier) == 'z') { |
fef20d9c FW |
1263 | size_t *ip = va_arg(args, size_t *); |
1264 | *ip = (str - buf); | |
1265 | } else { | |
1266 | int *ip = va_arg(args, int *); | |
1267 | *ip = (str - buf); | |
1268 | } | |
1269 | break; | |
1da177e4 | 1270 | } |
fef20d9c FW |
1271 | |
1272 | default: | |
1273 | switch (spec.type) { | |
1274 | case FORMAT_TYPE_LONG_LONG: | |
1275 | num = va_arg(args, long long); | |
1276 | break; | |
1277 | case FORMAT_TYPE_ULONG: | |
1278 | num = va_arg(args, unsigned long); | |
1279 | break; | |
1280 | case FORMAT_TYPE_LONG: | |
1281 | num = va_arg(args, long); | |
1282 | break; | |
1283 | case FORMAT_TYPE_SIZE_T: | |
1284 | num = va_arg(args, size_t); | |
1285 | break; | |
1286 | case FORMAT_TYPE_PTRDIFF: | |
1287 | num = va_arg(args, ptrdiff_t); | |
1288 | break; | |
a4e94ef0 Z |
1289 | case FORMAT_TYPE_UBYTE: |
1290 | num = (unsigned char) va_arg(args, int); | |
1291 | break; | |
1292 | case FORMAT_TYPE_BYTE: | |
1293 | num = (signed char) va_arg(args, int); | |
1294 | break; | |
fef20d9c FW |
1295 | case FORMAT_TYPE_USHORT: |
1296 | num = (unsigned short) va_arg(args, int); | |
1297 | break; | |
1298 | case FORMAT_TYPE_SHORT: | |
1299 | num = (short) va_arg(args, int); | |
1300 | break; | |
39e874f8 FW |
1301 | case FORMAT_TYPE_INT: |
1302 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1303 | break; |
1304 | default: | |
1305 | num = va_arg(args, unsigned int); | |
1306 | } | |
1307 | ||
1308 | str = number(str, end, num, spec); | |
1da177e4 | 1309 | } |
1da177e4 | 1310 | } |
fef20d9c | 1311 | |
f796937a JF |
1312 | if (size > 0) { |
1313 | if (str < end) | |
1314 | *str = '\0'; | |
1315 | else | |
0a6047ee | 1316 | end[-1] = '\0'; |
f796937a | 1317 | } |
fef20d9c | 1318 | |
f796937a | 1319 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1320 | return str-buf; |
fef20d9c | 1321 | |
1da177e4 | 1322 | } |
1da177e4 LT |
1323 | EXPORT_SYMBOL(vsnprintf); |
1324 | ||
1325 | /** | |
1326 | * vscnprintf - Format a string and place it in a buffer | |
1327 | * @buf: The buffer to place the result into | |
1328 | * @size: The size of the buffer, including the trailing null space | |
1329 | * @fmt: The format string to use | |
1330 | * @args: Arguments for the format string | |
1331 | * | |
1332 | * The return value is the number of characters which have been written into | |
b921c69f | 1333 | * the @buf not including the trailing '\0'. If @size is == 0 the function |
1da177e4 LT |
1334 | * returns 0. |
1335 | * | |
ba1835eb | 1336 | * If you're not already dealing with a va_list consider using scnprintf(). |
20036fdc AK |
1337 | * |
1338 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1339 | */ |
1340 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1341 | { | |
1342 | int i; | |
1343 | ||
7b9186f5 AGR |
1344 | i = vsnprintf(buf, size, fmt, args); |
1345 | ||
b921c69f AA |
1346 | if (likely(i < size)) |
1347 | return i; | |
1348 | if (size != 0) | |
1349 | return size - 1; | |
1350 | return 0; | |
1da177e4 | 1351 | } |
1da177e4 LT |
1352 | EXPORT_SYMBOL(vscnprintf); |
1353 | ||
1354 | /** | |
1355 | * snprintf - Format a string and place it in a buffer | |
1356 | * @buf: The buffer to place the result into | |
1357 | * @size: The size of the buffer, including the trailing null space | |
1358 | * @fmt: The format string to use | |
1359 | * @...: Arguments for the format string | |
1360 | * | |
1361 | * The return value is the number of characters which would be | |
1362 | * generated for the given input, excluding the trailing null, | |
1363 | * as per ISO C99. If the return is greater than or equal to | |
1364 | * @size, the resulting string is truncated. | |
20036fdc AK |
1365 | * |
1366 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1367 | */ |
7b9186f5 | 1368 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1369 | { |
1370 | va_list args; | |
1371 | int i; | |
1372 | ||
1373 | va_start(args, fmt); | |
7b9186f5 | 1374 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1375 | va_end(args); |
7b9186f5 | 1376 | |
1da177e4 LT |
1377 | return i; |
1378 | } | |
1da177e4 LT |
1379 | EXPORT_SYMBOL(snprintf); |
1380 | ||
1381 | /** | |
1382 | * scnprintf - Format a string and place it in a buffer | |
1383 | * @buf: The buffer to place the result into | |
1384 | * @size: The size of the buffer, including the trailing null space | |
1385 | * @fmt: The format string to use | |
1386 | * @...: Arguments for the format string | |
1387 | * | |
1388 | * The return value is the number of characters written into @buf not including | |
b903c0b8 | 1389 | * the trailing '\0'. If @size is == 0 the function returns 0. |
1da177e4 LT |
1390 | */ |
1391 | ||
7b9186f5 | 1392 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1393 | { |
1394 | va_list args; | |
1395 | int i; | |
1396 | ||
1397 | va_start(args, fmt); | |
b921c69f | 1398 | i = vscnprintf(buf, size, fmt, args); |
1da177e4 | 1399 | va_end(args); |
7b9186f5 | 1400 | |
b921c69f | 1401 | return i; |
1da177e4 LT |
1402 | } |
1403 | EXPORT_SYMBOL(scnprintf); | |
1404 | ||
1405 | /** | |
1406 | * vsprintf - Format a string and place it in a buffer | |
1407 | * @buf: The buffer to place the result into | |
1408 | * @fmt: The format string to use | |
1409 | * @args: Arguments for the format string | |
1410 | * | |
1411 | * The function returns the number of characters written | |
72fd4a35 | 1412 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1413 | * buffer overflows. |
1414 | * | |
ba1835eb | 1415 | * If you're not already dealing with a va_list consider using sprintf(). |
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 *); | |
75fb8f26 | 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; | |
75fb8f26 AS |
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); |