From 3e690ac60d1d525e54f80cc6ece4d16e2cd9009f Mon Sep 17 00:00:00 2001
From: Rafaël Carré <rafael.carre@gmail.com>
Date: Fri, 18 Jun 2010 18:31:14 +0000
Subject: arm/crt0.S: comment why the reset vector doesn't use absolute
 addressing

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26929 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/crt0.S | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'firmware')

diff --git a/firmware/target/arm/crt0.S b/firmware/target/arm/crt0.S
index f52056617a..3765df9ffc 100644
--- a/firmware/target/arm/crt0.S
+++ b/firmware/target/arm/crt0.S
@@ -26,6 +26,13 @@
     .global    start
 start:
     /* Exception vectors */
+
+    /*
+     * reset vector *MUST* use relative-addressing only
+     * the MMU might not be enabled yet, and the PC might point to
+     * a memory region not present in the linked binary
+     */
+
     b   newstart
     b   undef_instr_handler
     b   software_int_handler
-- 
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