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-rw-r--r--target-i386/bpt_helper.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/target-i386/bpt_helper.c b/target-i386/bpt_helper.c
index 23ce828491..49472ea85b 100644
--- a/target-i386/bpt_helper.c
+++ b/target-i386/bpt_helper.c
@@ -85,6 +85,8 @@ void cpu_x86_update_dr7(CPUX86State *env, uint32_t new_dr7)
target_ulong old_dr7 = env->dr[7];
int i;
+ new_dr7 |= DR7_FIXED_1;
+
/* If nothing is changing except the global/local enable bits,
then we can make the change more efficient. */
if (((old_dr7 ^ new_dr7) & ~0xff) == 0) {