Commit 462f8ed1 authored by Eduardo Habkost's avatar Eduardo Habkost
Browse files

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: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarEduardo Habkost <ehabkost@redhat.com>
parent d0052339

target-i386/bpt_helper.c

+1 −1
Original line number Diff line number Diff line
@@ -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) {