Phase one of my evil plan to clean up ld.so...

1 files changed, 281 insertions, 0 deletions

diff --git a/ldso/include/dl-string.h b/ldso/include/dl-string.h
new file mode 100644
index 000000000..647ab1efd
--- /dev/null
+++ b/ldso/include/dl-string.h
@@ -0,0 +1,281 @@
+#ifndef _LINUX_STRING_H_
+#define _LINUX_STRING_H_
+
+extern void *_dl_malloc(int size);
+extern char *_dl_getenv(const char *symbol, char **envp);
+extern void _dl_unsetenv(const char *symbol, char **envp);
+extern char *_dl_strdup(const char *string);
+extern void _dl_dprintf(int, const char *, ...);
+
+
+static size_t _dl_strlen(const char * str);
+static char *_dl_strcat(char *dst, const char *src);
+static char * _dl_strcpy(char * dst,const char *src);
+static int _dl_strcmp(const char * s1,const char * s2);
+static int _dl_strncmp(const char * s1,const char * s2,size_t len);
+static char * _dl_strchr(const char * str,int c);
+static char *_dl_strrchr(const char *str, int c);
+static char *_dl_strstr(const char *s1, const char *s2);
+static void * _dl_memcpy(void * dst, const void * src, size_t len);
+static int _dl_memcmp(const void * s1,const void * s2,size_t len);
+static void *_dl_memset(void * str,int c,size_t len);
+static char *_dl_get_last_path_component(char *path);
+static char *_dl_simple_ltoa(char * local, unsigned long i);
+static char *_dl_simple_ltoahex(char * local, unsigned long i);
+
+#ifndef NULL
+#define NULL ((void *) 0)
+#endif
+
+static inline size_t _dl_strlen(const char * str)
+{
+	register char *ptr = (char *) str;
+
+	while (*ptr)
+		ptr++;
+	return (ptr - str);
+}
+
+static inline char *_dl_strcat(char *dst, const char *src)
+{
+	register char *ptr = dst;
+
+	while (*ptr)
+		ptr++;
+
+	while (*src)
+		*ptr++ = *src++;
+	*ptr = '\0';
+
+	return dst;
+}
+
+static inline char * _dl_strcpy(char * dst,const char *src)
+{
+	register char *ptr = dst;
+
+	while (*src)
+		*dst++ = *src++;
+	*dst = '\0';
+
+	return ptr;
+}
+ 
+static inline int _dl_strcmp(const char * s1,const char * s2)
+{
+	register unsigned char c1, c2;
+
+	do {
+		c1 = (unsigned char) *s1++;
+		c2 = (unsigned char) *s2++;
+		if (c1 == '\0')
+			return c1 - c2;
+	}
+	while (c1 == c2);
+
+	return c1 - c2;
+}
+
+static inline int _dl_strncmp(const char * s1,const char * s2,size_t len)
+{
+	register unsigned char c1 = '\0';
+	register unsigned char c2 = '\0';
+
+	while (len > 0) {
+		c1 = (unsigned char) *s1++;
+		c2 = (unsigned char) *s2++;
+		if (c1 == '\0' || c1 != c2)
+			return c1 - c2;
+		len--;
+	}
+
+	return c1 - c2;
+}
+
+static inline char * _dl_strchr(const char * str,int c)
+{
+	register char ch;
+
+	do {
+		if ((ch = *str) == c)
+			return (char *) str;
+		str++;
+	}
+	while (ch);
+
+	return 0;
+}
+
+static inline char *_dl_strrchr(const char *str, int c)
+{
+    register char *prev = 0;
+    register char *ptr = (char *) str;
+
+    while (*ptr != '\0') {
+	if (*ptr == c)
+	    prev = ptr;
+	ptr++;  
+    }   
+    if (c == '\0')
+	return(ptr);
+    return(prev);
+}
+
+
+static 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 inline void * _dl_memcpy(void * dst, const void * src, size_t len)
+{
+	register char *a = dst;
+	register const char *b = src;
+
+	while (len--)
+		*a++ = *b++;
+
+	return dst;
+}
+
+
+static inline int _dl_memcmp(const void * s1,const void * s2,size_t len)
+{
+	unsigned char *c1 = (unsigned char *)s1;
+	unsigned char *c2 = (unsigned char *)s2;
+
+	while (len--) {
+		if (*c1 != *c2) 
+			return *c1 - *c2;
+		c1++;
+		c2++;
+	}
+	return 0;
+}
+
+static inline void * _dl_memset(void * str,int c,size_t len)
+{
+	register char *a = str;
+
+	while (len--)
+		*a++ = c;
+
+	return str;
+}
+
+static inline char *_dl_get_last_path_component(char *path)
+{
+	char *s;
+	register char *ptr = path;
+	register char *prev = 0;
+
+	while (*ptr)
+		ptr++;
+	s = ptr - 1;
+
+	/* strip trailing slashes */
+	while (s != path && *s == '/') {
+		*s-- = '\0';
+	}
+
+	/* find last component */
+	ptr = path;
+	while (*ptr != '\0') {
+	    if (*ptr == '/')
+		prev = ptr;
+	    ptr++;  
+	}   
+	s = prev;
+
+	if (s == NULL || s[1] == '\0')
+		return path;
+	else
+		return s+1;
+}
+
+/* Early on, we can't call printf, so use this to print out
+ * numbers using the SEND_STDERR() macro */
+static inline char *_dl_simple_ltoa(char * local, unsigned long i)
+{
+	/* 21 digits plus null terminator, good for 64-bit or smaller ints */
+	char *p = &local[22];
+	*p-- = '\0';
+	do {
+		*p-- = '0' + i % 10;
+		i /= 10;
+	} while (i > 0);
+	return p + 1;
+}
+
+static inline char *_dl_simple_ltoahex(char * local, unsigned long i)
+{
+	/* 21 digits plus null terminator, good for 64-bit or smaller ints */
+	char *p = &local[22];
+	*p-- = '\0';
+	do {
+		char temp = i % 0x10;
+		if (temp <= 0x09)
+		    *p-- = '0' + temp;
+		else
+		    *p-- = 'a' - 0x0a + temp;
+		i /= 0x10;
+	} while (i > 0);
+	*p-- = 'x';
+	*p-- = '0';
+	return p + 1;
+}
+
+
+#if defined mc68000 || defined __arm__ || defined __mips__ || defined __sh__
+/* On some arches constant strings are referenced through the GOT. */
+/* XXX Requires load_addr to be defined. */
+#define SEND_STDERR(X)				\
+  { const char *__s = (X);			\
+    if (__s < (const char *) load_addr) __s += load_addr;	\
+    _dl_write (2, __s, _dl_strlen (__s));	\
+  }
+#else
+#define SEND_STDERR(X) _dl_write(2, X, _dl_strlen(X));
+#endif
+
+#define SEND_ADDRESS_STDERR(X, add_a_newline) { \
+    char tmp[22], *tmp1; \
+    _dl_memset(tmp, 0, sizeof(tmp)); \
+    tmp1=_dl_simple_ltoahex( tmp, (unsigned long)(X)); \
+    _dl_write(2, tmp1, _dl_strlen(tmp1)); \
+    if (add_a_newline) { \
+	tmp[0]='\n'; \
+	_dl_write(2, tmp, 1); \
+    } \
+};
+
+#define SEND_NUMBER_STDERR(X, add_a_newline) { \
+    char tmp[22], *tmp1; \
+    _dl_memset(tmp, 0, sizeof(tmp)); \
+    tmp1=_dl_simple_ltoa( tmp, (unsigned long)(X)); \
+    _dl_write(2, tmp1, _dl_strlen(tmp1)); \
+    if (add_a_newline) { \
+	tmp[0]='\n'; \
+	_dl_write(2, tmp, 1); \
+    } \
+};
+
+
+#endif