target/s390x: Use unwind data for helper_mvpg

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

target/s390x/helper.h

@@ -12,7 +12,7 @@ DEF_HELPER_FLAGS_3(divs64, TCG_CALL_NO_WG, s64, env, s64, s64)
 DEF_HELPER_FLAGS_4(divu64, TCG_CALL_NO_WG, i64, env, i64, i64, i64)
 DEF_HELPER_4(srst, i64, env, i64, i64, i64)
 DEF_HELPER_4(clst, i64, env, i64, i64, i64)
-DEF_HELPER_4(mvpg, void, env, i64, i64, i64)
+DEF_HELPER_FLAGS_4(mvpg, TCG_CALL_NO_WG, i32, env, i64, i64, i64)
 DEF_HELPER_4(mvst, i64, env, i64, i64, i64)
 DEF_HELPER_5(ex, i32, env, i32, i64, i64, i64)
 DEF_HELPER_FLAGS_4(stam, TCG_CALL_NO_WG, void, env, i32, i64, i32)

target/s390x/mem_helper.c

@@ -398,11 +398,12 @@ uint64_t HELPER(clst)(CPUS390XState *env, uint64_t c, uint64_t s1, uint64_t s2)
 }
 
 /* move page */
-void HELPER(mvpg)(CPUS390XState *env, uint64_t r0, uint64_t r1, uint64_t r2)
+uint32_t HELPER(mvpg)(CPUS390XState *env, uint64_t r0, uint64_t r1, uint64_t r2)
 {
-    /* XXX missing r0 handling */
-    env->cc_op = 0;
-    fast_memmove(env, r1, r2, TARGET_PAGE_SIZE, 0);
+    /* ??? missing r0 handling, which includes access keys, but more
+       importantly optional suppression of the exception!  */
+    fast_memmove(env, r1, r2, TARGET_PAGE_SIZE, GETPC());
+    return 0; /* data moved */
 }
 
 /* string copy (c is string terminator) */

target/s390x/translate.c

@@ -2921,8 +2921,7 @@ static ExitStatus op_mvcs(DisasContext *s, DisasOps *o)
 
 static ExitStatus op_mvpg(DisasContext *s, DisasOps *o)
 {
-    potential_page_fault(s);
-    gen_helper_mvpg(cpu_env, regs[0], o->in1, o->in2);
+    gen_helper_mvpg(cc_op, cpu_env, regs[0], o->in1, o->in2);
     set_cc_static(s);
     return NO_EXIT;
 }