syscalls: fix page count for mapping in sys_execve and make caller run coreutils

grubshit/caller.c

@@ -9,7 +9,7 @@ int main() {
 
     // Arguments for the new program
     // The first argument is conventionally the program name
-    char *argv[] = { "./callee", "first_arg", "second_arg", NULL };
+    char *argv[] = { "/katau/core", "--help", NULL };
 
     // Environment variables for the new program
     char *envp[] = { "CUSTOM_VAR=Hello from caller!", "ANOTHER_VAR=123", NULL };
@@ -18,7 +18,7 @@ int main() {
     // The first argument is the path to the executable
     // The second is the array of arguments
     // The third is the array of environment variables
-    execve("/katau/callee.", argv, envp);
+    execve("/katau/core.", argv, envp);
 
     // This part of the code will only be reached if execve fails
     perror("execve failed");