xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: x86: Breakpoints do not consider CS.base

Browse Source 
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>
This commit is contained in:
Nadav Amit
2014-11-02 11:54:45 +02:00
committed by Paolo Bonzini
parent 7305eb5d8c
commit 82b32774c2
3 changed files with 18 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/vmx.c
View File

@@ -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;