feature: verbose feature for libusr

kernel/src/proc/process.rs

@@ -217,7 +217,6 @@ impl Process {
 
         let space_phys = lock.space.as_mut().unwrap().address_phys();
         let ttbr0 = space_phys | ((lock.id.asid() as usize) << 48);
-        debugln!("New user thread for {:?}, asid={:#x}", lock.id, lock.id.asid());
 
         let thread = Thread::new_user(lock.id, entry, stack, arg, ttbr0)?;
         let tid = thread.id();
@@ -237,7 +236,6 @@ impl Process {
         let dst_space = src_inner.space.as_mut().unwrap().fork()?;
         let dst_space_phys = (dst_space as *mut _ as usize) - mem::KERNEL_OFFSET;
         let dst_ttbr0 = dst_space_phys | ((dst_id.asid() as usize) << 48);
-        debugln!("New TTBR0 for {:?}, asid={:#x}", dst_id, dst_id.asid());
 
         let mut threads = Vec::new();
         let tid = Thread::fork(Some(dst_id), frame, dst_ttbr0)?.id();
@@ -534,7 +532,6 @@ impl Process {
         let entry = loader(new_space)?;
         let arg = Self::store_arguments(new_space, argv)?;
 
-        debugln!("Will now enter at {:#x}", entry);
         // TODO drop old address space
         process_lock.space = Some(new_space);