In various cases logical memory blocks are coalesced; As a result doing
a strict check whether memory blocks are the same doesn't necessarily
work as a previous addition of a given block might have been merged into
a bigger block.

Fix this by considering a block is already registered if it's a pure
subset of one of the existing blocks.

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

If something is wrong with a board's timer function such that it calls
functions not marked with notrace, U-Boot will hang.

Detect this, print a message and disable the trace.

Signed-off-by: Simon Glass <sjg@chromium.org>

When the early trace buffer overflows it leaves a gap in the trace buffer
between where the actual data finished and where it would have finished if
there were enough buffer space. This results in corrupted output.

Adjust the logic to resolve this and add a message when the buffer
overflows.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a few more useful items into the output. Update the buffers to use hex
consistently.

Signed-off-by: Simon Glass <sjg@chromium.org>

The trace does not necessarily start at the top level, so we can see it
go negative. Track this so that we can show an accurate value for the
stack depth.

Signed-off-by: Simon Glass <sjg@chromium.org>

Given that the compiler adds two function calls into each function, the
current spacing is overkill. Drop it down to 16 bytes per function, which
is still plenty. This saves some space in the trace buffer.

Also move the calculation into a function, so it is common code. Add a
check for gd->mon_len being unset, which breaks tracing.

Signed-off-by: Simon Glass <sjg@chromium.org>

It seems better to put the TEXT_BASE value in the file header rather than
in an entry record. While it is true that there is a separate base for
pre-relocation, this can be handled by using offsets in the file.

It is useful to have a version number in case we need to change the trace
format again.

Update the header to make these changes.

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the code slightly so that abuf can be used in U-Boot tools. It will
soon be needed for proftool.

Signed-off-by: Simon Glass <sjg@chromium.org>

This is a silly value at present, since U-Boot's call depth never reaches
200. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>

Avoid using the preprocessor with TIMER_EARLY.

Signed-off-by: Simon Glass <sjg@chromium.org>