target/s390x: Use unwind data for helper_tr

Reviewed-by: NAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

target/s390x/mem_helper.c

@@ -723,19 +723,24 @@ void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
     }
 }
 
-void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array,
-                uint64_t trans)
+static void do_helper_tr(CPUS390XState *env, uint32_t len, uint64_t array,
+                         uint64_t trans, uintptr_t ra)
 {
-    int i;
+    uint32_t i;
 
     for (i = 0; i <= len; i++) {
-        uint8_t byte = cpu_ldub_data(env, array + i);
-        uint8_t new_byte = cpu_ldub_data(env, trans + byte);
-
-        cpu_stb_data(env, array + i, new_byte);
+        uint8_t byte = cpu_ldub_data_ra(env, array + i, ra);
+        uint8_t new_byte = cpu_ldub_data_ra(env, trans + byte, ra);
+        cpu_stb_data_ra(env, array + i, new_byte, ra);
     }
 }
 
+void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array,
+                uint64_t trans)
+{
+    return do_helper_tr(env, len, array, trans, GETPC());
+}
+
 uint64_t HELPER(tre)(CPUS390XState *env, uint64_t array,
                      uint64_t len, uint64_t trans)
 {
@@ -1265,9 +1270,9 @@ uint32_t HELPER(ex)(CPUS390XState *env, uint32_t cc, uint64_t v1,
                               get_address(env, 0, b2, d2), 0);
             break;
         case 0xc00:
-            helper_tr(env, l, get_address(env, 0, b1, d1),
-                      get_address(env, 0, b2, d2));
-            break;
+            do_helper_tr(env, l, get_address(env, 0, b1, d1),
+                         get_address(env, 0, b2, d2), 0);
+            return cc;
         case 0xd00:
             cc = helper_trt(env, l, get_address(env, 0, b1, d1),
                             get_address(env, 0, b2, d2));

target/s390x/translate.c

@@ -4070,7 +4070,6 @@ static ExitStatus op_tprot(DisasContext *s, DisasOps *o)
 static ExitStatus op_tr(DisasContext *s, DisasOps *o)
 {
     TCGv_i32 l = tcg_const_i32(get_field(s->fields, l1));
-    potential_page_fault(s);
     gen_helper_tr(cpu_env, l, o->addr1, o->in2);
     tcg_temp_free_i32(l);
     set_cc_static(s);