From 462f8ed1f1eac189ef50d9586eae8af90dbe426f Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Wed, 7 Oct 2015 17:19:18 -0300 Subject: [PATCH] target-i386: Ensure always-1 bits on DR6 can't be cleared Bits 4-11 and 16-31 on DR6 are documented as always 1, so ensure they can't be cleared by software. Reviewed-by: Richard Henderson Signed-off-by: Eduardo Habkost --- target-i386/bpt_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target-i386/bpt_helper.c b/target-i386/bpt_helper.c index 144cfd43fc..dac1b1a360 100644 --- a/target-i386/bpt_helper.c +++ b/target-i386/bpt_helper.c @@ -262,7 +262,7 @@ void helper_set_dr(CPUX86State *env, int reg, target_ulong t0) } /* fallthru */ case 6: - env->dr[6] = t0; + env->dr[6] = t0 | DR6_FIXED_1; return; case 5: if (env->cr[4] & CR4_DE_MASK) { -- 2.30.2