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1 // Copyright 2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 //     * Redistributions of source code must retain the above copyright
7 //       notice, this list of conditions and the following disclaimer.
8 //     * Redistributions in binary form must reproduce the above
9 //       copyright notice, this list of conditions and the following
10 //       disclaimer in the documentation and/or other materials provided
11 //       with the distribution.
12 //     * Neither the name of Google Inc. nor the names of its
13 //       contributors may be used to endorse or promote products derived
14 //       from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
28 #ifndef V8_IA32_SIMULATOR_IA32_H_
29 #define V8_IA32_SIMULATOR_IA32_H_
30 
31 #include "allocation.h"
32 
33 namespace v8 {
34 namespace internal {
35 
36 // Since there is no simulator for the ia32 architecture the only thing we can
37 // do is to call the entry directly.
38 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
39   (entry(p0, p1, p2, p3, p4))
40 
41 
42 typedef int (*regexp_matcher)(String*, int, const byte*,
43                               const byte*, int*, Address, int, Isolate*);
44 
45 // Call the generated regexp code directly. The code at the entry address should
46 // expect eight int/pointer sized arguments and return an int.
47 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6, p7) \
48   (FUNCTION_CAST<regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7))
49 
50 
51 #define TRY_CATCH_FROM_ADDRESS(try_catch_address) \
52   (reinterpret_cast<TryCatch*>(try_catch_address))
53 
54 // The stack limit beyond which we will throw stack overflow errors in
55 // generated code. Because generated code on ia32 uses the C stack, we
56 // just use the C stack limit.
57 class SimulatorStack : public v8::internal::AllStatic {
58  public:
JsLimitFromCLimit(Isolate * isolate,uintptr_t c_limit)59   static inline uintptr_t JsLimitFromCLimit(Isolate* isolate,
60                                             uintptr_t c_limit) {
61     USE(isolate);
62     return c_limit;
63   }
64 
RegisterCTryCatch(uintptr_t try_catch_address)65   static inline uintptr_t RegisterCTryCatch(uintptr_t try_catch_address) {
66     return try_catch_address;
67   }
68 
UnregisterCTryCatch()69   static inline void UnregisterCTryCatch() { }
70 };
71 
72 } }  // namespace v8::internal
73 
74 #endif  // V8_IA32_SIMULATOR_IA32_H_
75