Added mem_realloc and string functions

boot/include/axboot.h

@@ -26,7 +26,9 @@
 #define BOOTLOADER_VERSION_STR "0.1"
 
 #ifndef UNREACHABLE
-	#define UNREACHABLE()
+	#define UNREACHABLE() __builtin_unreachable()
 #endif
 
+void axboot_init(void);
+
 #endif /* _AXBOOT_H */

boot/include/lib/string.h

@@ -24,11 +24,19 @@
 
 size_t mbstowcs(wchar_t *dest, const char **src, size_t len);
 
+size_t strspn(const char *s, const char *accept);
+size_t strcspn(const char *s, const char *reject);
 size_t strlen(const char *str);
+int strcmp(const char *s1, const char *s2);
+int strncmp(const char *s1, const char *s2, size_t n);
 char *strcpy(char *dest, const char *src);
+char *strdup(const char *s);
+char *strtok(char *str, const char *delim);
+char *strchr(char *s, int c);
+char *strrchr(char *s, int c);
 
 void *memset(void *dest, int val, size_t len);
-void *memcpy(void *dest, void *src, size_t len);
+void *memcpy(void *dest, const void *src, size_t len);
 int memcmp(const void *a, const void *b, size_t len);
 
 #endif /* _LIB_STRING_H */

boot/include/mm/mman.h

@@ -22,9 +22,18 @@
 
 #include <stddef.h>
 
+// NOTE: If any allocations fail, try increasing this number.
+#define MAX_ALLOCATIONS 256
+
+struct alloc_header {
+	void *addr;
+	size_t size;
+};
+
 void *mem_alloc(size_t n);
 int mem_allocat(void *addr, size_t npages);
+void *mem_realloc(void *addr, size_t n);
 
-void mem_free(void **addr);
+void mem_free(void *addr);
 
 #endif /* _MEM_MMAN_H */

boot/include/print.h

@@ -20,6 +20,7 @@
 #ifndef _PRINT_H
 #define _PRINT_H
 
+#include "nanoprintf.h"
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdbool.h>
@@ -29,4 +30,6 @@ void debug(const char *fmt, ...);
 
 void printstr(const char *str);
 
+void snprintf(char *buf, size_t size, const char *fmt, ...);
+
 #endif /* _PRINT_H */