# HG changeset patch
# User Pascal Bellard <pascal.bellard@slitaz.org>
# Date 1605690461 0
# Node ID 668f2e7befb0fcd75ebeef9b43c9b8afba230f7f
# Parent  8654e61dc1b358388aa6f061656a78d88184fc1e
Add EFI eltorito boot file truncate warning

diff -r 8654e61dc1b3 -r 668f2e7befb0 tazlito
--- a/tazlito	Sat Oct 31 16:26:51 2020 +0000
+++ b/tazlito	Wed Nov 18 09:07:41 2020 +0000
@@ -274,7 +274,9 @@
 
 fix_efi_boot_img_size() {
 	local n=$3
-	[ $n -gt 65535 ] && n=65535
+	# Sector count on 16 bits (max 128MB), see offset 6-7 in page 11 of
+	# https://pdos.csail.mit.edu/6.828/2014/readings/boot-cdrom.pdf
+	[ $n -gt 65535 ] && n=65535 && echo "Warning: truncate EFI eltorito boot file"
 	set32 $((0x66+2048*$(first_block $2/boot/isolinux/boot.cat))) $n $1 16
 	set32 $((0x1C+2048*$4)) $(($4*4)) $1
 }