From dd80badc521c8b865df8c4b63ebd2f5e2d5b4c4a Mon Sep 17 00:00:00 2001
From: hpa <hpa>
Date: Thu, 5 Apr 2001 06:21:53 +0000
Subject: [PATCH] Actually make NASM enforce the checkpoints.

---
 ldlinux.asm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ldlinux.asm b/ldlinux.asm
index 12ab164..4f02fa0 100644
--- a/ldlinux.asm
+++ b/ldlinux.asm
@@ -738,6 +738,10 @@ bailmsg:	db 'Boot failed', 0Dh, 0Ah, 0
 
 bs_checkpt	equ $			; Must be <= 1EFh
 
+%if (bs_checkpt-$$) > 0x1EF
+%error "Boot sector overflow"
+%endif
+
 		zb 1EFh-($-$$)
 bs_magic	equ $			; From here to the magic_len equ
 					; must match ldlinux_magic
@@ -1045,6 +1049,10 @@ safedumpregs:
 
 rl_checkpt	equ $				; Must be <= 400h
 
+%if (rl_checkpt-$$) > 0x400
+%error "Sector 1 overflow"
+%endif
+
 ; ----------------------------------------------------------------------------
 ;  End of code and data that have to be in the first sector
 ; ----------------------------------------------------------------------------
-- 
2.7.4