There were patches about this part before, such as http://lists.denx.de/pipermail/u-boot/2010-April/069592.html https://www.mail-archive.com/u-boot@lists.denx.de/msg13464.html And I reference that piece of code.
I have verified this patch set on freescale mx6sxsabresd revb board. Because the board related kgdb serial code is not fine for patch review, I just sent out the common code for review.
I am not sure whether this patch set will break other platform's kgdb support or not, so request for comment.
Peng Fan (2): kgdb: add breakpoint support arm:kgdb add KGDB support for arm platform
arch/arm/include/asm/proc-armv/ptrace.h | 2 +- arch/arm/include/asm/signal.h | 1 + arch/arm/lib/Makefile | 3 + arch/arm/lib/crt0.S | 4 + arch/arm/lib/interrupts.c | 24 +++ arch/arm/lib/kgdb/kgdb.c | 231 +++++++++++++++++++++++++++ arch/arm/lib/kgdb/setjmp.S | 20 +++ arch/arm/lib/vectors.S | 28 ++++ common/kgdb.c | 273 ++++++++++++++++++++++++++++++++ include/kgdb.h | 35 ++++ 10 files changed, 620 insertions(+), 1 deletion(-) create mode 100644 arch/arm/include/asm/signal.h create mode 100644 arch/arm/lib/kgdb/kgdb.c create mode 100644 arch/arm/lib/kgdb/setjmp.S