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author | Rouven Czerwinski <r.czerwinski@pengutronix.de> | 2019-06-24 12:00:43 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-06-27 11:05:43 +0200 |
commit | d71573a006a2fc2b83c076c556b88166f4e3dec3 (patch) | |
tree | ed0f9579d5e9b8b12c00e3fa7e1b424916d56442 /Documentation | |
parent | c37cc2d725a496551113f4ebb1d116823eb0dbd1 (diff) | |
download | barebox-d71573a006a2fc2b83c076c556b88166f4e3dec3.tar.gz barebox-d71573a006a2fc2b83c076c556b88166f4e3dec3.tar.xz |
add gdb helper scripts to load barebox symbols
Add a gdb script with two helper functions which use the new
pbl_barebox_break symbol to calculate the current barebox load address
on the device and loads a barebox ELF file to this address.
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/user/debugging.rst | 21 | ||||
-rw-r--r-- | Documentation/user/user-manual.rst | 1 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/user/debugging.rst b/Documentation/user/debugging.rst new file mode 100644 index 0000000000..15cb439043 --- /dev/null +++ b/Documentation/user/debugging.rst @@ -0,0 +1,21 @@ +Debugging with OpenOCD +====================== + +Barebox can be configured to break on prebootloader and main barebox entry. This +breakpoint can not be resumed and will stop the board to allow the user to +attach a JTAG debugger with OpenOCD. Additionally, barebox provides helper +scripts to load the symbols from the ELF binaries. +The python scripts require `pyelftools`. +To load the scripts into your gdb session, run the following command in the +barebox directory: + +.. code-block:: none + + (gdb) source scripts/gdb/helper.py + +This makes two new commands available in gdb, `bb-load-symbols` and +`bb-skip-break`. `bb-load-symbols` can load either the main `barebox` file or +one of the .pbl files in the image directories. The board needs to be stopped in +either the prebootloader or main barebox breakpoint, and gdb needs to be +connected to OpenOCD. To continue booting the board, `bb-skip-break` jumps over +the breakpoint and continues the barebox execution. diff --git a/Documentation/user/user-manual.rst b/Documentation/user/user-manual.rst index 516b760b1b..f04981c3f0 100644 --- a/Documentation/user/user-manual.rst +++ b/Documentation/user/user-manual.rst @@ -33,6 +33,7 @@ Contents: system-reset state random + debugging * :ref:`search` * :ref:`genindex` |