[syslinux:master] ldlinux: fix FAT EOF detection

[syslinux-bot for H. Peter Anvin]

Commit-ID:  dbbff6e3ff4ce7e2c1fd84b42559c312656c2d69
Gitweb:     http://syslinux.zytor.com/commit/dbbff6e3ff4ce7e2c1fd84b42559c312656c2d69
Author:     H. Peter Anvin <hpa at zytor.com>
AuthorDate: Mon, 25 Jan 2010 09:34:08 -0800
Committer:  H. Peter Anvin <hpa at zytor.com>
CommitDate: Mon, 25 Jan 2010 09:34:08 -0800

ldlinux: fix FAT EOF detection

We had the wrong highest possible cluster for the FAT; adjust it so
that it matches the definition.

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


---
 core/ldlinux.asm |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/core/ldlinux.asm b/core/ldlinux.asm
index ba7e804..70f9c71 100644
--- a/core/ldlinux.asm
+++ b/core/ldlinux.asm
@@ -1242,7 +1242,8 @@ nextcluster_fat12:
 		shr cx,4
 .even:		and cx,0FFFh
 		movzx edi,cx
-		cmp di,0FF0h
+		lea ax,[di-2]
+		cmp ax,0FF5h
 		pop si
 		pop cx
 		pop bx
@@ -1264,7 +1265,8 @@ nextcluster_fat16:
 		add bx,bx
 		and bx,1FEh
 		movzx edi,word [gs:si+bx]
-		cmp di,0FFF0h
+		lea ax,[di-2]
+		cmp ax,0FFF5h
 		pop bx
 		pop si
 		pop eax
@@ -1285,7 +1287,8 @@ nextcluster_fat28:
 		and bx,1FCh
 		mov edi,dword [gs:si+bx]
 		and edi,0FFFFFFFh	; 28 bits only
-		cmp edi,0FFFFFF0h
+		lea eax,[edi-2]
+		cmp eax,0FFFFFF5h
 		pop bx
 		pop si
 		pop eax