Removed syscall_exit.c and fixed merge request issues

userprog/syscall_filesize.c

+/*
+ * Returns the size, in bytes, of the file open as fd.
+ *
+ * Authored by Alex Stratford
+ */
+
 #include "system_calls.h"
 #include "filesys/file.h"
 
-int syscall_filesize(struct intr_frame *file_descriptor) {
+int syscall_filesize(struct intr_frame *f) {
+	// pop off first int argument from interrupt frame
+	int file_descriptor = *((int*)f->esp + 1);
     // Described in system_calls.h, stores file descriptors mapped to files
 	struct file_map *file_map = get_file(file_descriptor); 
-	int size;
 	if (file_map == NULL) // Checking if file is empty or non-existent
 		return -1; // Returning failure state
 	// Using the file_length function in file.h to get the length and store it
-	size = file_length(file_map->file); 
-	return size;
+	int size = file_length(file_map->file); 
+	f->eax = size;
 }
\ No newline at end of file