[sim] Consistent support for C calls with up to 9 args

src/arm/simulator-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_ARM
 
@@ skipping 1688 matching lines @@
   }
 }
 
 
 // Calls into the V8 runtime are based on this very simple interface.
 // Note: To be able to return two values from some calls the code in runtime.cc
 // uses the ObjectPair which is essentially two 32-bit values stuffed into a
 // 64-bit value. With the code below we assume that all runtime calls return
 // 64 bits of result. If they don't, the r1 result register contains a bogus
 // value, which is fine because it is caller-saved.
-typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0,
-                                        int32_t arg1,
-                                        int32_t arg2,
-                                        int32_t arg3,
-                                        int32_t arg4,
-                                        int32_t arg5);
+typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0, int32_t arg1,
+                                        int32_t arg2, int32_t arg3,
+                                        int32_t arg4, int32_t arg5,
+                                        int32_t arg6, int32_t arg7,
+                                        int32_t arg8);
 
 typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int32_t arg0, int32_t arg1,
                                                    int32_t arg2, int32_t arg3,
                                                    int32_t arg4);
 
 // These prototypes handle the four types of FP calls.
 typedef int64_t (*SimulatorRuntimeCompareCall)(double darg0, double darg1);
 typedef double (*SimulatorRuntimeFPFPCall)(double darg0, double darg1);
 typedef double (*SimulatorRuntimeFPCall)(double darg0);
 typedef double (*SimulatorRuntimeFPIntCall)(double darg0, int32_t arg0);
@@ skipping 20 matching lines @@
           (get_register(sp)
            & (::v8::internal::FLAG_sim_stack_alignment - 1)) == 0;
       Redirection* redirection = Redirection::FromSwiInstruction(instr);
       int32_t arg0 = get_register(r0);
       int32_t arg1 = get_register(r1);
       int32_t arg2 = get_register(r2);
       int32_t arg3 = get_register(r3);
       int32_t* stack_pointer = reinterpret_cast<int32_t*>(get_register(sp));
       int32_t arg4 = stack_pointer[0];
       int32_t arg5 = stack_pointer[1];
+      int32_t arg6 = stack_pointer[2];
+      int32_t arg7 = stack_pointer[3];
+      int32_t arg8 = stack_pointer[4];
+      STATIC_ASSERT(kMaxCParameters == 9);
+
       bool fp_call =
          (redirection->type() == ExternalReference::BUILTIN_FP_FP_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_COMPARE_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_FP_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_FP_INT_CALL);
       // This is dodgy but it works because the C entry stubs are never moved.
       // See comment in codegen-arm.cc and bug 1242173.
       int32_t saved_lr = get_register(lr);
       intptr_t external =
           reinterpret_cast<intptr_t>(redirection->external_function());
@@ skipping 167 matching lines @@
         set_register(r0, arg0);
       } else {
         // builtin call.
         DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL ||
                redirection->type() == ExternalReference::BUILTIN_CALL_PAIR);
         SimulatorRuntimeCall target =
             reinterpret_cast<SimulatorRuntimeCall>(external);
         if (::v8::internal::FLAG_trace_sim || !stack_aligned) {
           PrintF(
               "Call to host function at %p "
-              "args %08x, %08x, %08x, %08x, %08x, %08x",
+              "args %08x, %08x, %08x, %08x, %08x, %08x, %08x, %08x, %08x",
               static_cast<void*>(FUNCTION_ADDR(target)), arg0, arg1, arg2, arg3,
-              arg4, arg5);
+              arg4, arg5, arg6, arg7, arg8);
           if (!stack_aligned) {
             PrintF(" with unaligned stack %08x\n", get_register(sp));
           }
           PrintF("\n");
         }
         CHECK(stack_aligned);
-        int64_t result = target(arg0, arg1, arg2, arg3, arg4, arg5);
+        int64_t result =
+            target(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
         int32_t lo_res = static_cast<int32_t>(result);
         int32_t hi_res = static_cast<int32_t>(result >> 32);
         if (::v8::internal::FLAG_trace_sim) {
           PrintF("Returned %08x\n", lo_res);
         }
         set_register(r0, lo_res);
         set_register(r1, hi_res);
       }
       set_register(lr, saved_lr);
       set_pc(get_register(lr));
@@ skipping 4082 matching lines @@
   processor->prev_ = nullptr;
   processor->next_ = nullptr;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM