From: Francesco Cagnin <fcagnin@quarkslab.com>
This patch series aims to add gdbstub support to HVF (the 'QEMU
accelerator on macOS that employs Hypervisor.framework') on Apple
Silicon hosts.
The proposed implementation, structured like the KVM counterpart,
handles single-stepping, software breakpoints, hardware breakpoints and
hardware watchpoints.
The patch has been most recently tested working on macOS Ventura 13.1
hosts and Linux kernel 5.19 guests with the test script
'tests/guest-debug/test-gdbstub.py' (slightly updated to make it work
with Linux kernels compiled on macOS).
v3:
* Keep separate views of DBG*_EL1 registers while guest debugging is
enabled
NOTE: Should be implemented as Peter and Alex suggested, and works as
intended in my (limited) tests. Any other register to handle beside
DBG*_EL1?
* Handle singlestepping over instructions triggering a VM exit
NOTE: I'm not aware of unwanted side effects, please double-check the
fix is adequate.
* Merge patches 2 and 3 from previous patch series
v2:
* Move debug helpers to 'target/arm/hyp_gdbstub.c'
* Add support for SSTEP_NOIRQ and multi-core (thanks Mads Ynddal)
* Move calls to 'hv_vcpu_set_trap_debug_exceptions()' to
'hvf_arch_update_guest_debug()'
* Use 'arm_num_brps()' and 'arm_num_wrps()' to compute the number of
breakpoints and watchpoints available (thanks Peter Maydell)
Francesco Cagnin (3):
arm: move KVM breakpoints helpers
hvf: implement guest debugging on Apple Silicon hosts
hvf: handle singlestepping over instructions which trigger a VM exit
accel/hvf/hvf-accel-ops.c | 123 ++++++++
accel/hvf/hvf-all.c | 24 ++
cpu.c | 3 +
include/sysemu/hvf.h | 29 ++
include/sysemu/hvf_int.h | 1 +
target/arm/hvf/hvf.c | 635 +++++++++++++++++++++++++++++++++++++-
target/arm/hyp_gdbstub.c | 242 +++++++++++++++
target/arm/internals.h | 50 +++
target/arm/kvm64.c | 276 -----------------
target/arm/meson.build | 3 +-
10 files changed, 1107 insertions(+), 279 deletions(-)
create mode 100644 target/arm/hyp_gdbstub.c
--
2.39.0