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1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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27 | 27 |
28 #ifndef V8_IA32_SIMULATOR_IA32_H_ | 28 #ifndef V8_IA32_SIMULATOR_IA32_H_ |
29 #define V8_IA32_SIMULATOR_IA32_H_ | 29 #define V8_IA32_SIMULATOR_IA32_H_ |
30 | 30 |
31 | 31 |
32 // Since there is no simulator for the ia32 architecture the only thing we can | 32 // Since there is no simulator for the ia32 architecture the only thing we can |
33 // do is to call the entry directly. | 33 // do is to call the entry directly. |
34 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \ | 34 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \ |
35 entry(p0, p1, p2, p3, p4); | 35 entry(p0, p1, p2, p3, p4); |
36 | 36 |
37 // Calculated the stack limit beyond which we will throw stack overflow errors. | 37 // The stack limit beyond which we will throw stack overflow errors in |
38 // This macro must be called from a C++ method. It relies on being able to take | 38 // generated code. Because generated code on ia32 uses the C stack, we |
39 // the address of "this" to get a value on the current execution stack and then | 39 // just use the C stack limit. |
40 // calculates the stack limit based on that value. | 40 #define GENERATED_CODE_STACK_LIMIT(c_limit) \ |
41 // NOTE: The check for overflow is not safe as there is no guarantee that the | 41 (c_limit) |
42 // running thread has its stack in all memory up to address 0x00000000. | |
43 #define GENERATED_CODE_STACK_LIMIT(limit) \ | |
44 (reinterpret_cast<uintptr_t>(this) >= limit ? \ | |
45 reinterpret_cast<uintptr_t>(this) - limit : 0) | |
46 | 42 |
47 // Call the generated regexp code directly. The entry function pointer should | 43 // Call the generated regexp code directly. The entry function pointer should |
48 // expect seven int/pointer sized arguments and return an int. | 44 // expect seven int/pointer sized arguments and return an int. |
49 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \ | 45 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \ |
50 entry(p0, p1, p2, p3, p4, p5, p6) | 46 entry(p0, p1, p2, p3, p4, p5, p6) |
51 | 47 |
52 #endif // V8_IA32_SIMULATOR_IA32_H_ | 48 #endif // V8_IA32_SIMULATOR_IA32_H_ |
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