diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2017-01-28 19:04:37 +0100 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2017-01-28 19:58:31 +0100 |
| commit | 4ee789185bc215d62e9cfa92e23a8de2760789cb (patch) | |
| tree | 0ba97cb8314e91b9322d0df176d67f328dfafdf3 /executor/kvm.S | |
| parent | caef676b0afb2348f19cfddd9b31ee356cf9e2f6 (diff) | |
sys: improve kvm description
Allow fuzzer to change types of segment descriptors.
Alter more flags.
Allow fuzzer to do a random vmwrite.
Diffstat (limited to 'executor/kvm.S')
| -rw-r--r-- | executor/kvm.S | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/executor/kvm.S b/executor/kvm.S index 9f4df257e..896c59104 100644 --- a/executor/kvm.S +++ b/executor/kvm.S @@ -134,10 +134,10 @@ kvm_asm64_init_vm: // Write VMCS revision into VMXON and VMCS regions mov $MSR_IA32_VMX_BASIC, %rcx rdmsr - mov $ADDR_VAR_VMXON,%rdx - mov %eax,(%rdx) - mov $ADDR_VAR_VMCS,%rdx - mov %eax,(%rdx) + mov $ADDR_VAR_VMXON, %rdx + mov %eax, (%rdx) + mov $ADDR_VAR_VMCS, %rdx + mov %eax, (%rdx) mov $ADDR_VAR_VMXON_PTR, %rax vmxon (%rax) @@ -290,6 +290,16 @@ kvm_asm64_init_vm: mov %cr4, %rax VMSET(0x00006804, %rax) // Guest CR4 + // Write 1 additional random field. + mov $ADDR_VAR_VMWRITE_FLD, %rax + mov (%rax), %rdx + mov $ADDR_VAR_VMWRITE_VAL, %rax + mov (%rax), %rcx + xor %rax, %rax + vmread %rdx, %rax + xor %rcx, %rax + vmwrite %rax, %rdx + vmlaunch mov $0x00004400, %rdx |