target/s390x: Use unwind data for helper_testblock

Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

target/s390x/mem_helper.c

@@ -939,6 +939,7 @@ void HELPER(stctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
 
 uint32_t HELPER(testblock)(CPUS390XState *env, uint64_t real_addr)
 {
+    uintptr_t ra = GETPC();
     CPUState *cs = CPU(s390_env_get_cpu(env));
     uint64_t abs_addr;
     int i;
@@ -947,12 +948,14 @@ uint32_t HELPER(testblock)(CPUS390XState *env, uint64_t real_addr)
     abs_addr = mmu_real2abs(env, real_addr) & TARGET_PAGE_MASK;
     if (!address_space_access_valid(&address_space_memory, abs_addr,
                                     TARGET_PAGE_SIZE, true)) {
+        cpu_restore_state(cs, ra);
         program_interrupt(env, PGM_ADDRESSING, 4);
         return 1;
     }
 
     /* Check low-address protection */
     if ((env->cregs[0] & CR0_LOWPROT) && real_addr < 0x2000) {
+        cpu_restore_state(cs, ra);
         program_interrupt(env, PGM_PROTECTION, 4);
         return 1;
     }

target/s390x/translate.c

@@ -4047,7 +4047,6 @@ static ExitStatus op_tcxb(DisasContext *s, DisasOps *o)
 static ExitStatus op_testblock(DisasContext *s, DisasOps *o)
 {
     check_privileged(s);
-    potential_page_fault(s);
     gen_helper_testblock(cc_op, cpu_env, o->in2);
     set_cc_static(s);
     return NO_EXIT;