3 files changed, 26 insertions, 0 deletions
diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h
index 77554663a7..b242cb057e 100644
--- a/target-i386/cpu-qom.h
+++ b/target-i386/cpu-qom.h
@@ -151,4 +151,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 int x86_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 int x86_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 
+void x86_cpu_exec_enter(CPUState *cpu);
+void x86_cpu_exec_exit(CPUState *cpu);
+
 #endif
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 90d0a05eb1..223e43e04d 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2942,6 +2942,8 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
 #ifndef CONFIG_USER_ONLY
     cc->debug_excp_handler = breakpoint_handler;
 #endif
+    cc->cpu_exec_enter = x86_cpu_exec_enter;
+    cc->cpu_exec_exit = x86_cpu_exec_exit;
 }
 
 static const TypeInfo x86_cpu_type_info = {
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 28fefe0a1f..345bda188d 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -1262,3 +1262,24 @@ void do_cpu_sipi(X86CPU *cpu)
 {
 }
 #endif
+
+/* Frob eflags into and out of the CPU temporary format.  */
+
+void x86_cpu_exec_enter(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+    CPUX86State *env = &cpu->env;
+
+    CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+    env->df = 1 - (2 * ((env->eflags >> 10) & 1));
+    CC_OP = CC_OP_EFLAGS;
+    env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+}
+
+void x86_cpu_exec_exit(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+    CPUX86State *env = &cpu->env;
+
+    env->eflags = cpu_compute_eflags(env);
+}