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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 | /* * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org> * * GNU Lesser General Public License version 2.1 or later. */ #ifndef _DL_STRING_H #define _DL_STRING_H #include <features.h> #define __need_NULL #include <stddef.h> #include <dl-defs.h> /* for do_rem by dl-sysdep.h */ /* provide some sane defaults */ #ifndef do_rem # define do_rem(result, n, base) ((result) = (n) % (base)) #endif #ifndef do_div_10 # define do_div_10(result, remain) ((result) /= 10) #endif #ifdef IS_IN_rtld static __always_inline size_t _dl_strlen(const char *str) { register const char *ptr = (char *) str-1; while (*++ptr) ;/* empty */ return (ptr - str); } static __always_inline char * _dl_strcat(char *dst, const char *src) { register char *ptr = dst-1; src--; while (*++ptr) ;/* empty */ ptr--; while ((*++ptr = *++src) != 0) ;/* empty */ return dst; } static __always_inline char * _dl_strcpy(char *dst, const char *src) { register char *ptr = dst; dst--;src--; while ((*++dst = *++src) != 0) ;/* empty */ return ptr; } static __always_inline int _dl_strcmp(const char *s1, const char *s2) { register unsigned char c1, c2; s1--;s2--; do { c1 = (unsigned char) *++s1; c2 = (unsigned char) *++s2; if (c1 == '\0') return c1 - c2; } while (c1 == c2); return c1 - c2; } static __always_inline char * _dl_strchr(const char *str, int c) { register char ch; str--; do { if ((ch = *++str) == c) return (char *) str; } while (ch); return 0; } static __always_inline char * _dl_strrchr(const char *str, int c) { register char *prev = 0; register char *ptr = (char *) str-1; while (*++ptr != '\0') { if (*ptr == c) prev = ptr; } if (c == '\0') return(ptr); return(prev); } static __always_inline char * _dl_strstr(const char *s1, const char *s2) { register const char *s = s1; register const char *p = s2; do { if (!*p) return (char *) s1;; if (*p == *s) { ++p; ++s; } else { p = s2; if (!*s) return NULL; s = ++s1; } } while (1); } static __always_inline void * _dl_memcpy(void *dst, const void *src, size_t len) { register char *a = dst-1; register const char *b = src-1; while (len) { *++a = *++b; --len; } return dst; } static __always_inline int _dl_memcmp(const void *s1, const void *s2, size_t len) { unsigned char *c1 = (unsigned char *)s1-1; unsigned char *c2 = (unsigned char *)s2-1; while (len) { if (*++c1 != *++c2) return *c1 - *c2; len--; } return 0; } #if defined(__powerpc__) /* Will generate smaller and faster code due to loop unrolling.*/ static __always_inline void * _dl_memset(void *to, int c, size_t n) { unsigned long chunks; unsigned long *tmp_to; unsigned char *tmp_char; chunks = n / 4; tmp_to = to + n; c = c << 8 | c; c = c << 16 | c; if (!chunks) goto lessthan4; do { *--tmp_to = c; } while (--chunks); lessthan4: n = n % 4; if (!n) return to; tmp_char = (unsigned char *)tmp_to; do { *--tmp_char = c; } while (--n); return to; } #else static __always_inline void * _dl_memset(void *str, int c, size_t len) { register char *a = str; while (len--) *a++ = c; return str; } #endif static __always_inline char * _dl_get_last_path_component(char *path) { register char *ptr = path-1; while (*++ptr) ;/* empty */ /* strip trailing slashes */ while (ptr != path && *--ptr == '/') { *ptr = '\0'; } /* find last component */ while (ptr != path && *--ptr != '/') ;/* empty */ return ptr == path ? ptr : ptr+1; } #else /* IS_IN_rtld */ # include <string.h> # define _dl_strlen strlen # define _dl_strcat strcat # define _dl_strcpy strcpy # define _dl_strcmp strcmp # define _dl_strchr strchr # define _dl_strrchr strrchr # define _dl_strstr strstr # define _dl_memcpy memcpy # define _dl_memcmp memcmp # define _dl_memset memset #endif /* IS_IN_rtld */ #if defined IS_IN_rtld || defined __SUPPORT_LD_DEBUG__ /* Early on, we can't call printf, so use this to print out * numbers using the SEND_STDERR() macro. Avoid using mod * or using long division */ static __always_inline char * _dl_simple_ltoa(char *local, unsigned long i) { /* 20 digits plus a null terminator should be good for * 64-bit or smaller ints (2^64 - 1)*/ char *p = &local[22]; *--p = '\0'; do { char temp; do_rem(temp, i, 10); *--p = '0' + temp; do_div_10(i, temp); } while (i > 0); return p; } #endif #ifdef IS_IN_rtld static __always_inline char * _dl_simple_ltoahex(char *local, unsigned long i) { /* 16 digits plus a leading "0x" plus a null terminator, * should be good for 64-bit or smaller ints */ char *p = &local[22]; *--p = '\0'; do { char temp = i & 0xf; if (temp <= 0x09) *--p = '0' + temp; else *--p = 'a' - 0x0a + temp; i >>= 4; } while (i > 0); *--p = 'x'; *--p = '0'; return p; } /* The following macros may be used in dl-startup.c to debug * ldso before ldso has fixed itself up to make function calls */ /* On some (wierd) arches, none of this stuff works at all, so * disable the whole lot... */ /* The same applies for ARM FDPIC at least for the moment. */ #if defined(__mips__) || (__FDPIC__) # define SEND_STDERR(X) # define SEND_ADDRESS_STDERR(X, add_a_newline) # define SEND_NUMBER_STDERR(X, add_a_newline) #else /* On some arches constant strings are referenced through the GOT. * This requires that load_addr must already be defined... */ #if defined(mc68000) || defined(__arm__) || defined(__thumb__) || \ defined(__sh__) || defined(__powerpc__) || \ defined(__avr32__) || defined(__xtensa__) || defined(__sparc__) || defined(__microblaze__) # define CONSTANT_STRING_GOT_FIXUP(X) \ if ((X) < (const char *) load_addr) (X) += load_addr # define NO_EARLY_SEND_STDERR #else # define CONSTANT_STRING_GOT_FIXUP(X) #endif #define SEND_STDERR(X) \ { \ const char *tmp1 = (X); \ CONSTANT_STRING_GOT_FIXUP(tmp1); \ _dl_write(2, tmp1, _dl_strlen(tmp1)); \ } #define SEND_ADDRESS_STDERR(ADR, add_a_newline) \ { \ char tmp[26], v, *tmp2, *tmp1 = tmp; \ unsigned long X = (unsigned long)(ADR); \ CONSTANT_STRING_GOT_FIXUP(tmp1); \ tmp2 = tmp1 + sizeof(tmp); \ *--tmp2 = '\0'; \ if (add_a_newline) *--tmp2 = '\n'; \ do { \ v = (X) & 0xf; \ if (v <= 0x09) \ *--tmp2 = '0' + v; \ else \ *--tmp2 = 'a' - 0x0a + v; \ (X) >>= 4; \ } while ((X) > 0); \ *--tmp2 = 'x'; \ *--tmp2 = '0'; \ _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \ } #define SEND_NUMBER_STDERR(NUM, add_a_newline) \ { \ char tmp[26], v, *tmp2, *tmp1 = tmp; \ unsigned long X = (unsigned long)(NUM); \ CONSTANT_STRING_GOT_FIXUP(tmp1); \ tmp2 = tmp1 + sizeof(tmp); \ *--tmp2 = '\0'; \ if (add_a_newline) *--tmp2 = '\n'; \ do { \ do_rem(v, (X), 10); \ *--tmp2 = '0' + v; \ do_div_10((X), v); \ } while ((X) > 0); \ _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \ } #endif /* Some targets may have to override this to something that doesn't * reference constant strings through the GOT. This macro should be * preferred over SEND_STDERR for constant strings before we complete * bootstrap. */ #ifndef SEND_EARLY_STDERR # define SEND_EARLY_STDERR(S) SEND_STDERR(S) #else # define EARLY_STDERR_SPECIAL #endif #ifdef __SUPPORT_LD_DEBUG_EARLY__ # define SEND_STDERR_DEBUG(X) SEND_STDERR(X) # define SEND_EARLY_STDERR_DEBUG(X) SEND_EARLY_STDERR(X) # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline) SEND_NUMBER_STDERR(X, add_a_newline) # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline) SEND_ADDRESS_STDERR(X, add_a_newline) #else # define SEND_STDERR_DEBUG(X) # define SEND_EARLY_STDERR_DEBUG(X) # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline) # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline) #endif #endif /* IS_IN_rtld */ #endif /* _DL_STRING_H */ |