https://interrupt.memfault.com/blog/a-deep-dive-into-arm-cortex-m-debug-interfaces

Bus Blaster

http://openocd.sourceforge.net/doc/html/index.html#toc_OpenOCD-Project-Setup

GDB cheatsheet

http://hertaville.com/2012/09/16/part-3-debugging-openocd-0-6-0/

http://snowcap.fi/blog/2011/11/21/openocd-with-swd/

https://www.youtube.com/watch?v=PorfLSr3DDI

See gdb chapter in 21st Century C

https://github.com/cyrus-and/gdb-dashboard

- Discussion on linkedin Embedded Systems Design

https://answers.launchpad.net/gcc-arm-embedded/+question/256851

https://launchpad.net/~terry.guo/+archive/ubuntu/gcc-arm-embedded

http://thread.gmane.org/gmane.linux.ports.ia64/22770

alternative:

http://www.isystem.com/products/software/testidea-pro

GDB with Python

https://interrupt.memfault.com/blog/using-pypi-packages-with-GDB

https://interrupt.memfault.com/blog/automate-debugging-with-gdb-python-api