From: Richard Henderson <r...@twiddle.net>
If the debug register is not enabled, we need
do nothing besides update the register.
Signed-off-by: Richard Henderson <r...@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
target-i386/bpt_helper.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/target-i386/bpt_helper.c b/target-i386/bpt_helper.c
index ca58ab7..7ff41a6 100644
--- a/target-i386/bpt_helper.c
+++ b/target-i386/bpt_helper.c
@@ -228,9 +228,14 @@ void helper_movl_drN_T0(CPUX86State *env, int reg,
target_ulong t0)
{
#ifndef CONFIG_USER_ONLY
if (reg < 4) {
- hw_breakpoint_remove(env, reg);
- env->dr[reg] = t0;
- hw_breakpoint_insert(env, reg);
+ if (hw_breakpoint_enabled(env->dr[7], reg)
+ && hw_breakpoint_type(env->dr[7], reg) != DR7_TYPE_IO_RW) {
+ hw_breakpoint_remove(env, reg);
+ env->dr[reg] = t0;
+ hw_breakpoint_insert(env, reg);
+ } else {
+ env->dr[reg] = t0;
+ }
} else if (reg == 7) {
cpu_x86_update_dr7(env, t0);
} else {
--
2.1.0
