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| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-11-02 11:54:45 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-07 15:44:04 +0100 |
| commit | 82b32774c2d00c0a12ab182c67e32e0b5e5e580a (patch) | |
| tree | 4952f26cbee010060c1b447216cc60961b9edee5 /arch/x86/kvm/vmx.c | |
| parent | 7305eb5d8cf147ce4178e723c95de15e2f001429 (diff) | |
| download | lwn-82b32774c2d00c0a12ab182c67e32e0b5e5e580a.tar.gz lwn-82b32774c2d00c0a12ab182c67e32e0b5e5e580a.zip | |
KVM: x86: Breakpoints do not consider CS.base
x86 debug registers hold a linear address. Therefore, breakpoints detection
should consider CS.base, and check whether instruction linear address equals
(CS.base + RIP). This patch introduces a function to evaluate RIP linear
address and uses it for breakpoints detection.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ad5e0806e1e1..284f5c2fdf0b 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5118,9 +5118,7 @@ static int handle_dr(struct kvm_vcpu *vcpu) if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; vcpu->run->debug.arch.dr7 = dr7; - vcpu->run->debug.arch.pc = - vmcs_readl(GUEST_CS_BASE) + - vmcs_readl(GUEST_RIP); + vcpu->run->debug.arch.pc = kvm_get_linear_rip(vcpu); vcpu->run->debug.arch.exception = DB_VECTOR; vcpu->run->exit_reason = KVM_EXIT_DEBUG; return 0; |