1 #ifndef _LINUX_STRING_H_
2 #define _LINUX_STRING_H_
4 #include <dl-sysdep.h> // for do_rem
6 static size_t _dl_strlen(const char * str);
7 static char *_dl_strcat(char *dst, const char *src);
8 static char * _dl_strcpy(char * dst,const char *src);
9 static int _dl_strcmp(const char * s1,const char * s2);
10 static int _dl_strncmp(const char * s1,const char * s2,size_t len);
11 static char * _dl_strchr(const char * str,int c);
12 static char *_dl_strrchr(const char *str, int c);
13 static char *_dl_strstr(const char *s1, const char *s2);
14 static void * _dl_memcpy(void * dst, const void * src, size_t len);
15 static int _dl_memcmp(const void * s1,const void * s2,size_t len);
16 static void *_dl_memset(void * str,int c,size_t len);
17 static char *_dl_get_last_path_component(char *path);
18 static char *_dl_simple_ltoa(char * local, unsigned long i);
19 static char *_dl_simple_ltoahex(char * local, unsigned long i);
22 #define NULL ((void *) 0)
25 static __always_inline size_t _dl_strlen(const char * str)
27 register const char *ptr = (char *) str-1;
33 static __always_inline char * _dl_strcat(char *dst, const char *src)
35 register char *ptr = dst-1;
41 while ((*++ptr = *++src) != 0)
46 static inline char * __attribute__((__always_inline__)) _dl_strcpy(char * dst,const char *src)
48 register char *ptr = dst;
51 while ((*++dst = *++src) != 0);
56 static inline int __attribute__((__always_inline__)) _dl_strcmp(const char * s1,const char * s2)
58 register unsigned char c1, c2;
61 c1 = (unsigned char) *++s1;
62 c2 = (unsigned char) *++s2;
71 static inline int __attribute__((__always_inline__)) _dl_strncmp(const char * s1,const char * s2,size_t len)
73 register unsigned char c1 = '\0';
74 register unsigned char c2 = '\0';
78 c1 = (unsigned char) *++s1;
79 c2 = (unsigned char) *++s2;
80 if (c1 == '\0' || c1 != c2)
87 static inline char * __attribute__((__always_inline__)) _dl_strchr(const char * str,int c)
92 if ((ch = *++str) == c)
100 static inline char * _dl_strrchr(const char *str, int c)
102 register char *prev = 0;
103 register char *ptr = (char *) str-1;
105 while (*++ptr != '\0') {
114 static inline char * _dl_strstr(const char *s1, const char *s2)
116 register const char *s = s1;
117 register const char *p = s2;
136 static inline void * _dl_memcpy(void * dst, const void * src, size_t len)
138 register char *a = dst-1;
139 register const char *b = src-1;
148 static inline int __attribute__((__always_inline__)) _dl_memcmp(const void * s1,const void * s2,size_t len)
150 unsigned char *c1 = (unsigned char *)s1-1;
151 unsigned char *c2 = (unsigned char *)s2-1;
162 /* Will generate smaller and faster code due to loop unrolling.*/
163 static inline void * __attribute__((__always_inline__)) _dl_memset(void *to, int c, size_t n)
165 unsigned long chunks;
166 unsigned long *tmp_to;
167 unsigned char *tmp_char;
181 tmp_char = (unsigned char *)tmp_to;
188 static inline void * __attribute__((__always_inline__)) _dl_memset(void * str,int c,size_t len)
190 register char *a = str;
199 static inline char * __attribute__((__always_inline__)) _dl_get_last_path_component(char *path)
201 register char *ptr = path-1;
206 /* strip trailing slashes */
207 while (ptr != path && *--ptr == '/') {
211 /* find last component */
212 while (ptr != path && *--ptr != '/')
214 return ptr == path ? ptr : ptr+1;
217 /* Early on, we can't call printf, so use this to print out
218 * numbers using the SEND_STDERR() macro. Avoid using mod
219 * or using long division */
220 static inline char * __attribute__((__always_inline__)) _dl_simple_ltoa(char * local, unsigned long i)
222 /* 20 digits plus a null terminator should be good for
223 * 64-bit or smaller ints (2^64 - 1)*/
224 char *p = &local[22];
235 static inline char * __attribute__((__always_inline__)) _dl_simple_ltoahex(char * local, unsigned long i)
237 /* 16 digits plus a leading "0x" plus a null terminator,
238 * should be good for 64-bit or smaller ints */
239 char *p = &local[22];
246 *--p = 'a' - 0x0a + temp;
257 /* The following macros may be used in dl-startup.c to debug
258 * ldso before ldso has fixed itself up to make function calls */
260 /* On some (wierd) arches, none of this stuff works at all, so
261 * disable the whole lot... */
262 #if defined(__mips__)
264 # define SEND_STDERR(X)
265 # define SEND_ADDRESS_STDERR(X, add_a_newline)
266 # define SEND_NUMBER_STDERR(X, add_a_newline)
270 /* On some arches constant strings are referenced through the GOT.
271 * This requires that load_addr must already be defined... */
272 #if defined(mc68000) || defined(__arm__) || defined(__mips__) \
273 || defined(__sh__) || defined(__powerpc__)
274 # define CONSTANT_STRING_GOT_FIXUP(X) \
275 if ((X) < (const char *) load_addr) (X) += load_addr
277 # define CONSTANT_STRING_GOT_FIXUP(X)
280 #define SEND_STDERR(X) \
282 const char *tmp1 = (X); \
283 CONSTANT_STRING_GOT_FIXUP(tmp1); \
284 _dl_write(2, tmp1, _dl_strlen(tmp1)); \
287 #define SEND_ADDRESS_STDERR(ADR, add_a_newline) \
289 char tmp[26], v, *tmp2, *tmp1 = tmp; \
290 unsigned long X = (unsigned long)(ADR); \
291 CONSTANT_STRING_GOT_FIXUP(tmp1); \
292 tmp2 = tmp1 + sizeof(tmp); \
294 if (add_a_newline) *--tmp2 = '\n'; \
300 *--tmp2 = 'a' - 0x0a + v; \
305 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
308 #define SEND_NUMBER_STDERR(X, add_a_newline) \
310 char tmp[26], v, *tmp2, *tmp1 = tmp; \
311 CONSTANT_STRING_GOT_FIXUP(tmp1); \
312 tmp2 = tmp1 + sizeof(tmp); \
314 if (add_a_newline) *--tmp2 = '\n'; \
316 do_rem(v, (X), 10); \
320 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
324 #ifdef __SUPPORT_LD_DEBUG_EARLY__
325 # define SEND_STDERR_DEBUG(X) SEND_STDERR(X)
326 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline) SEND_ADDRESS_STDERR(X, add_a_newline)
328 # define SEND_STDERR_DEBUG(X)
329 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline)