Comparing a hex dump on the U-Boot command line with the contents of a file on the host system is fairly easy and convenient to do manually if it is small. But the format used hexdump by default differs from that shown by U-Boot. Add a note about how to make them the same.
(For large dumps, writing the data to the network with tftpput, or to a USB stick with ext4save is easiest.)
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v4: - Indicate that hd does not show the offset correctly - Add an xxd + sed example too
Changes in v3: - Add this to the docs for the md command
doc/usage/md.rst | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/doc/usage/md.rst b/doc/usage/md.rst index 3951b0d58f5..4c1073ea354 100644 --- a/doc/usage/md.rst +++ b/doc/usage/md.rst @@ -39,6 +39,16 @@ length number of values to dump. Defaults to 40 (0d64). Note that this is not the same as the number of bytes, unless .b is used.
+Note that the format of 'md.b' can be emulated from linux with:: + + # This works but requires using sed to get the extra spaces + # <addr> is the address, <f> is the filename + xxd -o <addr> -g1 <f> |sed 's/ / /' >bad + + # This uses a single tool but the offset always starts at 0 + # <f> is the filename + hexdump -v -e '"%08.8_ax: " 16/1 "%02x " " "' -e '16/1 "%_p" "\n" ' <f> +
Example -------