From 8b1e566cb2732b0723124a1dd096eda697bbfb3e Mon Sep 17 00:00:00 2001 From: Mukesh Rathor Date: Tue, 7 Sep 2010 19:17:16 +0100 Subject: tools/debugger/gdbsx: use MTF flag for HVM guests for single step The attached patch first tries the MTF flag for HVM guest single step, reverting to manually setting the TF flag if MTF fails. Tested on 4.0.1. Compile tested on unstable. Signed-off-by: mukesh.rathor@oracle.com Signed-off-by: Ian Jackson --- tools/debugger/gdbsx/xg/xg_main.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'tools/debugger') diff --git a/tools/debugger/gdbsx/xg/xg_main.c b/tools/debugger/gdbsx/xg/xg_main.c index 9cd9fc3a6d..d2eec0b527 100644 --- a/tools/debugger/gdbsx/xg/xg_main.c +++ b/tools/debugger/gdbsx/xg/xg_main.c @@ -158,6 +158,7 @@ xg_init() /* + * Precondition: domctl global struct must be filled * Returns : 0 Success, failure otherwise with errno set */ static int @@ -366,6 +367,19 @@ _change_TF(vcpuid_t which_vcpu, int guest_bitness, int setit) union vcpu_guest_context_any anyc; int sz = sizeof(anyc); + /* first try the MTF for hvm guest. otherwise do manually */ + if (_hvm_guest) { + domctl.u.debug_op.vcpu = which_vcpu; + domctl.u.debug_op.op = setit ? XEN_DOMCTL_DEBUG_OP_SINGLE_STEP_ON : + XEN_DOMCTL_DEBUG_OP_SINGLE_STEP_OFF; + + if (_domctl_hcall(XEN_DOMCTL_debug_op, NULL, 0) == 0) { + XGTRC("vcpu:%d:MTF success setit:%d\n", which_vcpu, setit); + return 0; + } + XGTRC("vcpu:%d:MTF failed. setit:%d\n", which_vcpu, setit); + } + memset(&anyc, 0, sz); domctl.u.vcpucontext.vcpu = (uint16_t)which_vcpu; set_xen_guest_handle(domctl.u.vcpucontext.ctxt, &anyc.ctxt); -- cgit v1.2.3