1 #ifndef _LINUX_STRING_H_
2 #define _LINUX_STRING_H_
4 #include <dl-sysdep.h> // for do_rem
7 static size_t _dl_strlen(const char * str);
8 static char *_dl_strcat(char *dst, const char *src);
9 static char * _dl_strcpy(char * dst,const char *src);
10 static int _dl_strcmp(const char * s1,const char * s2);
11 static int _dl_strncmp(const char * s1,const char * s2,size_t len);
12 static char * _dl_strchr(const char * str,int c);
13 static char *_dl_strrchr(const char *str, int c);
14 static char *_dl_strstr(const char *s1, const char *s2);
15 static void * _dl_memcpy(void * dst, const void * src, size_t len);
16 static int _dl_memcmp(const void * s1,const void * s2,size_t len);
17 static void *_dl_memset(void * str,int c,size_t len);
18 static char *_dl_get_last_path_component(char *path);
19 static char *_dl_simple_ltoa(char * local, unsigned long i);
20 static char *_dl_simple_ltoahex(char * local, unsigned long i);
23 #define NULL ((void *) 0)
26 static __always_inline size_t _dl_strlen(const char * str)
28 register const char *ptr = (char *) str-1;
34 static __always_inline char * _dl_strcat(char *dst, const char *src)
36 register char *ptr = dst-1;
42 while ((*++ptr = *++src) != 0)
47 static __always_inline char * _dl_strcpy(char * dst,const char *src)
49 register char *ptr = dst;
52 while ((*++dst = *++src) != 0);
57 static __always_inline int _dl_strcmp(const char * s1,const char * s2)
59 register unsigned char c1, c2;
62 c1 = (unsigned char) *++s1;
63 c2 = (unsigned char) *++s2;
72 static __always_inline int _dl_strncmp(const char * s1,const char * s2,size_t len)
74 register unsigned char c1 = '\0';
75 register unsigned char c2 = '\0';
79 c1 = (unsigned char) *++s1;
80 c2 = (unsigned char) *++s2;
81 if (c1 == '\0' || c1 != c2)
88 static __always_inline char * _dl_strchr(const char * str,int c)
93 if ((ch = *++str) == c)
101 static inline char * _dl_strrchr(const char *str, int c)
103 register char *prev = 0;
104 register char *ptr = (char *) str-1;
106 while (*++ptr != '\0') {
115 static inline char * _dl_strstr(const char *s1, const char *s2)
117 register const char *s = s1;
118 register const char *p = s2;
137 static __always_inline void * _dl_memcpy(void * dst, const void * src, size_t len)
139 register char *a = dst-1;
140 register const char *b = src-1;
149 static __always_inline int _dl_memcmp(const void * s1,const void * s2,size_t len)
151 unsigned char *c1 = (unsigned char *)s1-1;
152 unsigned char *c2 = (unsigned char *)s2-1;
163 /* Will generate smaller and faster code due to loop unrolling.*/
164 static __always_inline void * _dl_memset(void *to, int c, size_t n)
166 unsigned long chunks;
167 unsigned long *tmp_to;
168 unsigned char *tmp_char;
182 tmp_char = (unsigned char *)tmp_to;
189 static __always_inline void * _dl_memset(void * str,int c,size_t len)
191 register char *a = str;
200 static __always_inline char * _dl_get_last_path_component(char *path)
202 register char *ptr = path-1;
207 /* strip trailing slashes */
208 while (ptr != path && *--ptr == '/') {
212 /* find last component */
213 while (ptr != path && *--ptr != '/')
215 return ptr == path ? ptr : ptr+1;
218 /* Early on, we can't call printf, so use this to print out
219 * numbers using the SEND_STDERR() macro. Avoid using mod
220 * or using long division */
221 static __always_inline char * _dl_simple_ltoa(char * local, unsigned long i)
223 /* 20 digits plus a null terminator should be good for
224 * 64-bit or smaller ints (2^64 - 1)*/
225 char *p = &local[22];
236 static __always_inline char * _dl_simple_ltoahex(char * local, unsigned long i)
238 /* 16 digits plus a leading "0x" plus a null terminator,
239 * should be good for 64-bit or smaller ints */
240 char *p = &local[22];
247 *--p = 'a' - 0x0a + temp;
258 /* The following macros may be used in dl-startup.c to debug
259 * ldso before ldso has fixed itself up to make function calls */
261 /* On some (wierd) arches, none of this stuff works at all, so
262 * disable the whole lot... */
263 #if defined(__mips__)
265 # define SEND_STDERR(X)
266 # define SEND_ADDRESS_STDERR(X, add_a_newline)
267 # define SEND_NUMBER_STDERR(X, add_a_newline)
271 /* On some arches constant strings are referenced through the GOT.
272 * This requires that load_addr must already be defined... */
273 #if defined(mc68000) || defined(__arm__) || defined(__mips__) \
274 || defined(__sh__) || defined(__powerpc__)
275 # define CONSTANT_STRING_GOT_FIXUP(X) \
276 if ((X) < (const char *) load_addr) (X) += load_addr
277 # define NO_EARLY_SEND_STDERR
279 # define CONSTANT_STRING_GOT_FIXUP(X)
282 #define SEND_STDERR(X) \
284 const char *tmp1 = (X); \
285 CONSTANT_STRING_GOT_FIXUP(tmp1); \
286 _dl_write(2, tmp1, _dl_strlen(tmp1)); \
289 #define SEND_ADDRESS_STDERR(ADR, add_a_newline) \
291 char tmp[26], v, *tmp2, *tmp1 = tmp; \
292 unsigned long X = (unsigned long)(ADR); \
293 CONSTANT_STRING_GOT_FIXUP(tmp1); \
294 tmp2 = tmp1 + sizeof(tmp); \
296 if (add_a_newline) *--tmp2 = '\n'; \
302 *--tmp2 = 'a' - 0x0a + v; \
307 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
310 #define SEND_NUMBER_STDERR(NUM, add_a_newline) \
312 char tmp[26], v, *tmp2, *tmp1 = tmp; \
313 unsigned long X = (unsigned long)(NUM); \
314 CONSTANT_STRING_GOT_FIXUP(tmp1); \
315 tmp2 = tmp1 + sizeof(tmp); \
317 if (add_a_newline) *--tmp2 = '\n'; \
319 do_rem(v, (X), 10); \
323 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
327 #ifdef __SUPPORT_LD_DEBUG_EARLY__
328 # define SEND_STDERR_DEBUG(X) SEND_STDERR(X)
329 # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline) SEND_NUMBER_STDERR(X, add_a_newline)
330 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline) SEND_ADDRESS_STDERR(X, add_a_newline)
332 # define SEND_STDERR_DEBUG(X)
333 # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline)
334 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline)