From: Francesco Cagnin <fcag...@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