pxelinux: set StackTop == StackBuf

We need StackTop to be <= StackBuf since we use memory immediately
above StackBuf during replace_bootstrap.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/core/pxelinux.asm b/core/pxelinux.asm
index 6acbca6..e1a62c7 100644 (file)
--- a/core/pxelinux.asm
+++ b/core/pxelinux.asm
@@ -218,7 +218,7 @@ packet_buf_size     equ $-packet_buf
                ; therefore we relocate it from 7C00h on startup.
                ;
 StackBuf       equ $-44                ; Base of stack if we use our own
-StackTop       equ $
+StackTop       equ StackBuf
 
 ;
 ; Primary entry point.