[regexp] Remove remainder of native RegExpExecStub

src/s390/simulator-s390.h

Index: src/s390/simulator-s390.h
diff --git a/src/s390/simulator-s390.h b/src/s390/simulator-s390.h
index 95a7d057722f8f7dd42a857ff6bced62221172ae..3d3fc44d7e38b3ebfcb068f9ac73b00f5b4bb014 100644
--- a/src/s390/simulator-s390.h
+++ b/src/s390/simulator-s390.h
@@ -25,16 +25,14 @@ namespace internal {
   (entry(p0, p1, p2, p3, p4))
 
 typedef int (*s390_regexp_matcher)(String*, int, const byte*, const byte*, int*,
-                                   int, Address, int, void*, Isolate*);
+                                   int, Address, int, Isolate*);
 
 // Call the generated regexp code directly. The code at the entry address
 // should act as a function matching the type ppc_regexp_matcher.
-// The ninth argument is a dummy that reserves the space used for
-// the return address added by the ExitFrame in native calls.
 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \
                                    p7, p8)                                     \
   (FUNCTION_CAST<s390_regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7,   \
-                                             NULL, p8))
+                                             p8))
 
 // The stack limit beyond which we will throw stack overflow errors in
 // generated code. Because generated code on s390 uses the C stack, we
@@ -1259,10 +1257,9 @@ class Simulator {
 
 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \
                                    p7, p8)                                     \
-  Simulator::current(isolate)->Call(entry, 10, (intptr_t)p0, (intptr_t)p1,     \
-                                    (intptr_t)p2, (intptr_t)p3, (intptr_t)p4,  \
-                                    (intptr_t)p5, (intptr_t)p6, (intptr_t)p7,  \
-                                    (intptr_t)NULL, (intptr_t)p8)
+  Simulator::current(isolate)->Call(                                           \
+      entry, 9, (intptr_t)p0, (intptr_t)p1, (intptr_t)p2, (intptr_t)p3,        \
+      (intptr_t)p4, (intptr_t)p5, (intptr_t)p6, (intptr_t)p7, (intptr_t)p8)
 
 // The simulator has its own stack. Thus it has a different stack limit from
 // the C-based native code.  The JS-based limit normally points near the end of