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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_S390 | 7 #if V8_TARGET_ARCH_S390 |
8 | 8 |
9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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32 * - r10: End of input (points to byte after last character in input). | 32 * - r10: End of input (points to byte after last character in input). |
33 * - r11: Frame pointer. Used to access arguments, local variables and | 33 * - r11: Frame pointer. Used to access arguments, local variables and |
34 * RegExp registers. | 34 * RegExp registers. |
35 * - r12: IP register, used by assembler. Very volatile. | 35 * - r12: IP register, used by assembler. Very volatile. |
36 * - r15/sp : Points to tip of C stack. | 36 * - r15/sp : Points to tip of C stack. |
37 * | 37 * |
38 * The remaining registers are free for computations. | 38 * The remaining registers are free for computations. |
39 * Each call to a public method should retain this convention. | 39 * Each call to a public method should retain this convention. |
40 * | 40 * |
41 * The stack will have the following structure: | 41 * The stack will have the following structure: |
42 * - fp[112] Isolate* isolate (address of the current isolate) | 42 * - fp[108] Isolate* isolate (address of the current isolate) |
43 * - fp[108] secondary link/return address used by native call. | |
44 * - fp[104] direct_call (if 1, direct call from JavaScript code, | 43 * - fp[104] direct_call (if 1, direct call from JavaScript code, |
45 * if 0, call through the runtime system). | 44 * if 0, call through the runtime system). |
46 * - fp[100] stack_area_base (high end of the memory area to use as | 45 * - fp[100] stack_area_base (high end of the memory area to use as |
47 * backtracking stack). | 46 * backtracking stack). |
48 * - fp[96] capture array size (may fit multiple sets of matches) | 47 * - fp[96] capture array size (may fit multiple sets of matches) |
49 * - fp[0..96] zLinux ABI register saving area | 48 * - fp[0..96] zLinux ABI register saving area |
50 * --- sp when called --- | 49 * --- sp when called --- |
51 * --- frame pointer ---- | 50 * --- frame pointer ---- |
52 * - fp[-4] direct_call (if 1, direct call from JavaScript code, | 51 * - fp[-4] direct_call (if 1, direct call from JavaScript code, |
53 * if 0, call through the runtime system). | 52 * if 0, call through the runtime system). |
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76 * character of the string). The remaining registers start out as garbage. | 75 * character of the string). The remaining registers start out as garbage. |
77 * | 76 * |
78 * The data up to the return address must be placed there by the calling | 77 * The data up to the return address must be placed there by the calling |
79 * code and the remaining arguments are passed in registers, e.g. by calling the | 78 * code and the remaining arguments are passed in registers, e.g. by calling the |
80 * code entry as cast to a function with the signature: | 79 * code entry as cast to a function with the signature: |
81 * int (*match)(String* input_string, | 80 * int (*match)(String* input_string, |
82 * int start_index, | 81 * int start_index, |
83 * Address start, | 82 * Address start, |
84 * Address end, | 83 * Address end, |
85 * int* capture_output_array, | 84 * int* capture_output_array, |
| 85 * int num_capture_registers, |
86 * byte* stack_area_base, | 86 * byte* stack_area_base, |
87 * Address secondary_return_address, // Only used by native call. | 87 * bool direct_call = false, |
88 * bool direct_call = false) | 88 * Isolate* isolate); |
89 * The call is performed by NativeRegExpMacroAssembler::Execute() | 89 * The call is performed by NativeRegExpMacroAssembler::Execute() |
90 * (in regexp-macro-assembler.cc) via the CALL_GENERATED_REGEXP_CODE macro | 90 * (in regexp-macro-assembler.cc) via the CALL_GENERATED_REGEXP_CODE macro |
91 * in s390/simulator-s390.h. | 91 * in s390/simulator-s390.h. |
92 * When calling as a non-direct call (i.e., from C++ code), the return address | |
93 * area is overwritten with the LR register by the RegExp code. When doing a | |
94 * direct call from generated code, the return address is placed there by | |
95 * the calling code, as in a normal exit frame. | |
96 */ | 92 */ |
97 | 93 |
98 #define __ ACCESS_MASM(masm_) | 94 #define __ ACCESS_MASM(masm_) |
99 | 95 |
100 RegExpMacroAssemblerS390::RegExpMacroAssemblerS390(Isolate* isolate, Zone* zone, | 96 RegExpMacroAssemblerS390::RegExpMacroAssemblerS390(Isolate* isolate, Zone* zone, |
101 Mode mode, | 97 Mode mode, |
102 int registers_to_save) | 98 int registers_to_save) |
103 : NativeRegExpMacroAssembler(isolate, zone), | 99 : NativeRegExpMacroAssembler(isolate, zone), |
104 masm_(new MacroAssembler(isolate, NULL, kRegExpCodeSize, | 100 masm_(new MacroAssembler(isolate, NULL, kRegExpCodeSize, |
105 CodeObjectRequired::kYes)), | 101 CodeObjectRequired::kYes)), |
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1277 } | 1273 } |
1278 } | 1274 } |
1279 | 1275 |
1280 #undef __ | 1276 #undef __ |
1281 | 1277 |
1282 #endif // V8_INTERPRETED_REGEXP | 1278 #endif // V8_INTERPRETED_REGEXP |
1283 } // namespace internal | 1279 } // namespace internal |
1284 } // namespace v8 | 1280 } // namespace v8 |
1285 | 1281 |
1286 #endif // V8_TARGET_ARCH_S390 | 1282 #endif // V8_TARGET_ARCH_S390 |
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