[PATCH v2] multiboot2: clarify usage of the address tag

[Roger Pau Monne]

Add a note to spell out that if the address tag is not present the
file should be loaded using the elf header.

Signed-off-by: Roger Pau Monné <address@hidden>
---
Cc: Daniel Kiper <address@hidden>
Cc: address@hidden
---
Changes since v1:
 - s/elf/@sc{elf}/
 - s/Multiboot/Multiboot2/
---
 doc/multiboot.texi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/multiboot.texi b/doc/multiboot.texi
index 2e2d7e74a..3c797787c 100644
--- a/doc/multiboot.texi
+++ b/doc/multiboot.texi
@@ -509,6 +509,12 @@ assumes that no bss segment is present.
 
 @end table
 
+Note: This information does not need to be provided if the kernel image
+is in @sc{elf} format, but it must be provided if the image is in a.out
+format or in some other format. Compliant boot loaders must be able to
+load images that are either in @sc{elf} format or contain the address
+tag embedded in the Multiboot2 header.
+
 @subsection The entry address tag of Multiboot2 header
 
 @example
-- 
2.17.1