[Qemu-devel] [PATCH 0/2] target-arm: implement architectural breakpoints

[Peter Maydell <peter.maydell@linaro.org>]

Implement support for the ARM architecturally mandated hardware
breakpoints, for ARMv8 and ARMv7. Tested that hardware bps work
for both v7 and v8 kernels (including v8 compat userspace in a
32 bit kernel).

There are a few odd subfeatures which we don't implement (yet):
 * address-mismatch breakpoints which fire if the PC is anything
   other than the specified value
 * address-mismatch breakpoints with zero byte-address-select,
   which fire for every single instruction execution
 * unlinked context match breakpoints, which fire for every
   instruction executed with a particular value of CONTEXTIDR/VMID

These aren't used by Linux's ptrace support, and I wasn't
sure of the best way to implement them, so for now they just
produce a LOG_UNIMP warning if the guest tries to use them.

This patchset sits on target-arm.next (ie after the watchpoint code).

Peter Maydell (2):
  target-arm: Implement setting guest breakpoints
  target-arm: Implement handling of breakpoint firing

 target-arm/cpu.c       |   1 +
 target-arm/cpu.h       |   1 +
 target-arm/helper.c    | 126 ++++++++++++++++++++++++++++++++++++++++++++++++-
 target-arm/internals.h |  15 ++++++
 target-arm/machine.c   |   1 +
 target-arm/op_helper.c |  75 +++++++++++++++++++++++------
 6 files changed, 202 insertions(+), 17 deletions(-)

-- 
1.9.1