fixed clear .bss code

diff --git a/src/startup.s b/src/startup.s
index 4e32389..82f548e 100644 (file)
--- a/src/startup.s
+++ b/src/startup.s
@@ -23,8 +23,9 @@
 
        # zero the BSS section
        xor %eax, %eax
-       mov _bss_start, %edi
-       mov _bss_size, %ecx
+       mov $_bss_start, %edi
+       mov $_bss_size, %ecx
+       cmp $0, %ecx
        jz skip_bss_zero
        shr $4, %ecx
        rep stosl