modified some syscall code in rlibc, fs stuff

kernel/initrd.h

@@ -0,0 +1,36 @@
+#ifndef KINITRD_H
+#define KINITRD_H
+
+#include <stdint.h>
+
+typedef struct {
+    char c_magic[6];
+    char c_ino[8];
+    char c_mode[8];
+    char c_uid[8];
+    char c_gid[8];
+    char c_nlink[8];
+    char c_mtime[8];
+    char c_filesize[8];
+    char c_devmajor[8];
+    char c_devminor[8];
+    char c_rdevmajor[8];
+    char c_rdevminor[8];
+    char c_namesize[8];
+    char c_check[8];
+} cpio_header_t;
+
+static inline uint32_t parse_hex(const char *s) {
+    uint32_t val = 0;
+    for (int i = 0; i < 8; i++) {
+        val <<= 4;
+        if (s[i] >= '0' && s[i] <= '9')      val += (s[i] - '0');
+        else if (s[i] >= 'A' && s[i] <= 'F') val += (s[i] - 'A' + 10);
+        else if (s[i] >= 'a' && s[i] <= 'f') val += (s[i] - 'a' + 10);
+    }
+    return val;
+}
+
+void parse_cpio(void *initrd_start);
+
+#endif