From: Antonio Ospite <ao2@ao2.it>
Date: Sat, 28 Jun 2014 08:44:24 +0000 (+0200)
Subject: README: more details about the format used for the map file
X-Git-Url: https://git.ao2.it/ddsect.git/commitdiff_plain/0cf32b433cd2b1c528cf273c9d589841c25c9d90

README: more details about the format used for the map file
---

diff --git a/README b/README
index 0c292b2..dc5a0d6 100644
--- a/README
+++ b/README
@@ -6,9 +6,18 @@ or to split a raw flash dump into its MTD partitions.
 
 The format for describing each memory section in a map file is:
 
-  HexStartingAddres-HexEndingAddress : "name"
+  HexStartingAddress-HexEndingAddress : "name"
 
-just like the output of the MTD driver in linux.
+where HexEndingAddress is actually the address of the byte _after_ the last
+one of the section (HexStartingAddress + size); this is because of how the
+output of the MTD driver in linux is formed (see drivers/mtd/mtdpart.c).
+
+	printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset,
+		(unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name);
+
+This is slightly different from the format used in other memory layout files
+(like for instance the one used by flashrom, which specifies the actual end
+address), but it allows to just reuse the output of the linux mtd driver.
 
 Empty lines and lines starting with the '#' character will be ignored
 in the map file.