[PATCH v5 4/6] target-arm: kvm - support for single step
From: Alex Bennée <hidden>
Date: 2015-05-29 15:19:22
Also in:
kvm, kvmarm, qemu-devel
Subsystem:
the rest · Maintainer:
Linus Torvalds
This adds support for single-step. There isn't much to do on the QEMU side as after we set-up the request for single step via the debug ioctl it is all handled within the kernel. Signed-off-by: Alex Benn?e <redacted> --- v2 - convert to using HSR_EC v3 - use internals.h definitions --- target-arm/kvm.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index c3bad6f..de2865a 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c@@ -528,6 +528,13 @@ static int kvm_handle_debug(CPUState *cs, struct kvm_run *run) kvm_cpu_synchronize_state(cs); switch (hsr_ec) { + case EC_SOFTWARESTEP: + if (cs->singlestep_enabled) { + return true; + } else { + error_report("Came out of SINGLE STEP when not enabled"); + } + break; case EC_AA64_BKPT: if (kvm_find_sw_breakpoint(cs, env->pc)) { return true;
@@ -588,6 +595,9 @@ int kvm_arch_on_sigbus(int code, void *addr) void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg) { + if (cs->singlestep_enabled) { + dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; + } if (kvm_sw_breakpoints_active(cs)) { dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; }
--
2.4.1