Implement passing commandline strings

kernel/proc/procgroup.h

@@ -5,14 +5,15 @@
 #include <libk/list.h>
 #include <libk/rbtree.h>
 #include <libk/std.h>
+#include <page_size.h>
 #include <proc/env.h>
 #include <proc/resource.h>
 #include <sync/spin_lock.h>
 #include <sys/mm.h>
 #include <sys/procgroup.h>
 
-#define PROCGROUP_VFS_HANDLES_MAX 256
-#define PROCGROUP_RESOURCES_MAX   256
+#define PROCGROUP_RESOURCES_MAX 256
+#define PROCGROUP_CMDLINE_MAX   PAGE_SIZE
 
 struct proc;
 struct reschedule_ctx;
@@ -36,6 +37,8 @@ struct procgroup {
   uintptr_t map_base;
   struct procgroup_tls tls;
   struct proc_env env;
+  uintptr_t uvaddr_cmdline;
+  uintptr_t paddr_cmdline;
 };
 
 struct procgroup* procgroup_create(void);