[Xen-changelog] [xen master] tools/insn-fuzz: Provide IA32_DEBUGCTL consistently to the emulator

[patchbot@xxxxxxx]

commit 9e9b56fe8aab1f9376acdbbac575b97b7a4e8df9
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Mon Mar 27 10:37:35 2017 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Apr 6 18:42:49 2017 +0100

    tools/insn-fuzz: Provide IA32_DEBUGCTL consistently to the emulator
    
    x86_emulates()'s is_branch_step() performs a speculative read of
    IA32_DEBUGCTL, but doesn't squash exceptions should they arise.  In reality,
    this MSR is always available.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 tools/fuzz/x86_instruction_emulator/fuzz-emul.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c 
b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
index 10501d9..9544aa4 100644
--- a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
+++ b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
@@ -402,7 +402,8 @@ enum {
     MSRI_STAR,
     MSRI_LSTAR,
     MSRI_CSTAR,
-    MSRI_SYSCALL_MASK
+    MSRI_SYSCALL_MASK,
+    MSRI_IA32_DEBUGCTLMSR,
 };
 
 static const unsigned int msr_index[MSR_INDEX_MAX] = {
@@ -413,7 +414,8 @@ static const unsigned int msr_index[MSR_INDEX_MAX] = {
     [MSRI_STAR]              = MSR_STAR,
     [MSRI_LSTAR]             = MSR_LSTAR,
     [MSRI_CSTAR]             = MSR_CSTAR,
-    [MSRI_SYSCALL_MASK]      = MSR_SYSCALL_MASK
+    [MSRI_SYSCALL_MASK]      = MSR_SYSCALL_MASK,
+    [MSRI_IA32_DEBUGCTLMSR]  = MSR_IA32_DEBUGCTLMSR,
 };
 
 static int fuzz_read_msr(
--
generated by git-patchbot for /home/xen/git/xen.git#master

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