From 6022ec8efc783a442881a4a9fa5a2cdb03fca7bc Mon Sep 17 00:00:00 2001
From: WangRunji <wangrunji0408@163.com>
Date: Tue, 17 Jul 2018 11:45:55 +0800
Subject: [PATCH] Fix load user program out of range

---
 kernel/src/process/context.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/src/process/context.rs b/kernel/src/process/context.rs
index aca7c7e..13f0166 100644
--- a/kernel/src/process/context.rs
+++ b/kernel/src/process/context.rs
@@ -65,6 +65,9 @@ impl Context {
                     let virt_addr = ph.virtual_addr() as usize;
                     let offset = ph.offset() as usize;
                     let file_size = ph.file_size() as usize;
+                    if file_size == 0 {
+                        return;
+                    }
                     use core::slice;
                     let target = unsafe { slice::from_raw_parts_mut(virt_addr as *mut u8, file_size) };
                     target.copy_from_slice(&data[offset..offset + file_size]);
@@ -117,7 +120,7 @@ impl Context {
 
 impl Debug for Context {
     fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
-        write!(f, "{:?}", self.arch)
+        write!(f, "{:x?}", self.arch)
     }
 }