This patch adds support for breakpoint and single-step exception hooks.
v3 version of this patch is published and reviewed with arm64 kdgb and kprobes patch series [1] and [2]
[1] http://lwn.net/Articles/570648/ [2] https://lwn.net/Articles/571063/
Changes v3 -> v4: -Incorporated review comments: http://lists.infradead.org/pipermail/linux-arm-kernel/2013-October/207372.ht... -Removed unnecessary comments -Added comments for breakpoint re-entrancy & rw locks - Rebased on top of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64.git Branch:upstream commit ID: dc1ccc48159d63eca5089e507c82c7d22ef60839 (Linux 3.13-rc2) - CCing Jason Wessel, since arm64 kgdb patchset is dependant on this.
Sandeepa Prabhu (1): arm64: support single-step and breakpoint handler hooks
arch/arm64/include/asm/debug-monitors.h | 21 ++++++++ arch/arm64/kernel/debug-monitors.c | 88 ++++++++++++++++++++++++++++++++- arch/arm64/kernel/entry.S | 2 + 3 files changed, 110 insertions(+), 1 deletion(-)