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

src/mips64/simulator-mips64.cc

 // Copyright 2011 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 <limits.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_MIPS64
@@ skipping 1966 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 v1 result register contains a bogus
 // value, which is fine because it is caller-saved.
 
-typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0,
-                                        int64_t arg1,
-                                        int64_t arg2,
-                                        int64_t arg3,
-                                        int64_t arg4,
-                                        int64_t arg5);
+typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0, int64_t arg1,
+                                           int64_t arg2, int64_t arg3,
+                                           int64_t arg4, int64_t arg5,
+                                           int64_t arg6, int64_t arg7,
+                                           int64_t arg8);
 
 typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int64_t arg0, int64_t arg1,
                                                    int64_t arg2, int64_t arg3,
                                                    int64_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 12 matching lines @@
 // C-based V8 runtime. They are also used for debugging with simulator.
 void Simulator::SoftwareInterrupt() {
   // There are several instructions that could get us here,
   // the break_ instruction, or several variants of traps. All
   // Are "SPECIAL" class opcode, and are distinuished by function.
   int32_t func = instr_.FunctionFieldRaw();
   uint32_t code = (func == BREAK) ? instr_.Bits(25, 6) : -1;
   // We first check if we met a call_rt_redirected.
   if (instr_.InstructionBits() == rtCallRedirInstr) {
     Redirection* redirection = Redirection::FromSwiInstruction(instr_.instr());
+
+    int64_t* stack_pointer = reinterpret_cast<int64_t*>(get_register(sp));
+
     int64_t arg0 = get_register(a0);
     int64_t arg1 = get_register(a1);
     int64_t arg2 = get_register(a2);
     int64_t arg3 = get_register(a3);
-    int64_t arg4, arg5;
-
-    arg4 = get_register(a4);  // Abi n64 register a4.
-    arg5 = get_register(a5);  // Abi n64 register a5.
+    int64_t arg4 = get_register(a4);
+    int64_t arg5 = get_register(a5);
+    int64_t arg6 = get_register(a6);
+    int64_t arg7 = get_register(a7);
+    int64_t arg8 = stack_pointer[0];
+    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);
 
     if (!IsMipsSoftFloatABI) {
       // With the hard floating point calling convention, double
       // arguments are passed in FPU registers. Fetch the arguments
@@ skipping 174 matching lines @@
       set_register(v0, arg0);
     } else {
       DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL ||
              redirection->type() == ExternalReference::BUILTIN_CALL_PAIR);
       SimulatorRuntimeCall target =
                   reinterpret_cast<SimulatorRuntimeCall>(external);
       if (::v8::internal::FLAG_trace_sim) {
         PrintF(
             "Call to host function at %p "
             "args %08" PRIx64 " , %08" PRIx64 " , %08" PRIx64 " , %08" PRIx64
-            " , %08" PRIx64 " , %08" PRIx64 " \n",
+            " , %08" PRIx64 " , %08" PRIx64 " , %08" PRIx64 " , %08" PRIx64
+            " , %08" PRIx64 " \n",
             static_cast<void*>(FUNCTION_ADDR(target)), arg0, arg1, arg2, arg3,
-            arg4, arg5);
+            arg4, arg5, arg6, arg7, arg8);
       }
-      // int64_t result = target(arg0, arg1, arg2, arg3, arg4, arg5);
-      // set_register(v0, static_cast<int32_t>(result));
-      // set_register(v1, static_cast<int32_t>(result >> 32));
-      ObjectPair result = target(arg0, arg1, arg2, arg3, arg4, arg5);
+      ObjectPair result =
+          target(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
       set_register(v0, (int64_t)(result.x));
       set_register(v1, (int64_t)(result.y));
     }
      if (::v8::internal::FLAG_trace_sim) {
        PrintF("Returned %08" PRIx64 "  : %08" PRIx64 " \n", get_register(v1),
               get_register(v0));
     }
     set_register(ra, saved_ra);
     set_pc(get_register(ra));
 
@@ skipping 2898 matching lines @@
 }
 
 
 #undef UNSUPPORTED
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_MIPS64