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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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3805 __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); | 3805 __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
3806 if (kDebug && FLAG_debug_code) __ mov(lr, Operand(pc)); | 3806 if (kDebug && FLAG_debug_code) __ mov(lr, Operand(pc)); |
3807 __ pop(pc); | 3807 __ pop(pc); |
3808 } | 3808 } |
3809 | 3809 |
3810 | 3810 |
3811 void CEntryStub::GenerateCore(MacroAssembler* masm, | 3811 void CEntryStub::GenerateCore(MacroAssembler* masm, |
3812 Label* throw_normal_exception, | 3812 Label* throw_normal_exception, |
3813 Label* throw_out_of_memory_exception, | 3813 Label* throw_out_of_memory_exception, |
3814 StackFrame::Type frame_type, | 3814 StackFrame::Type frame_type, |
3815 bool do_gc) { | 3815 bool do_gc, |
| 3816 bool always_allocate) { |
3816 // r0: result parameter for PerformGC, if any | 3817 // r0: result parameter for PerformGC, if any |
3817 // r4: number of arguments including receiver (C callee-saved) | 3818 // r4: number of arguments including receiver (C callee-saved) |
3818 // r5: pointer to builtin function (C callee-saved) | 3819 // r5: pointer to builtin function (C callee-saved) |
3819 // r6: pointer to the first argument (C callee-saved) | 3820 // r6: pointer to the first argument (C callee-saved) |
3820 | 3821 |
3821 if (do_gc) { | 3822 if (do_gc) { |
3822 // Passing r0. | 3823 // Passing r0. |
3823 __ Call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); | 3824 __ Call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); |
3824 } | 3825 } |
3825 | 3826 |
| 3827 ExternalReference scope_depth = |
| 3828 ExternalReference::heap_always_allocate_scope_depth(); |
| 3829 if (always_allocate) { |
| 3830 __ mov(r0, Operand(scope_depth)); |
| 3831 __ ldr(r1, MemOperand(r0)); |
| 3832 __ add(r1, r1, Operand(1)); |
| 3833 __ str(r1, MemOperand(r0)); |
| 3834 } |
| 3835 |
3826 // Call C built-in. | 3836 // Call C built-in. |
3827 // r0 = argc, r1 = argv | 3837 // r0 = argc, r1 = argv |
3828 __ mov(r0, Operand(r4)); | 3838 __ mov(r0, Operand(r4)); |
3829 __ mov(r1, Operand(r6)); | 3839 __ mov(r1, Operand(r6)); |
3830 | 3840 |
3831 // TODO(1242173): To let the GC traverse the return address of the exit | 3841 // TODO(1242173): To let the GC traverse the return address of the exit |
3832 // frames, we need to know where the return address is. Right now, | 3842 // frames, we need to know where the return address is. Right now, |
3833 // we push it on the stack to be able to find it again, but we never | 3843 // we push it on the stack to be able to find it again, but we never |
3834 // restore from it in case of changes, which makes it impossible to | 3844 // restore from it in case of changes, which makes it impossible to |
3835 // support moving the C entry code stub. This should be fixed, but currently | 3845 // support moving the C entry code stub. This should be fixed, but currently |
3836 // this is OK because the CEntryStub gets generated so early in the V8 boot | 3846 // this is OK because the CEntryStub gets generated so early in the V8 boot |
3837 // sequence that it is not moving ever. | 3847 // sequence that it is not moving ever. |
3838 __ add(lr, pc, Operand(4)); // compute return address: (pc + 8) + 4 | 3848 __ add(lr, pc, Operand(4)); // compute return address: (pc + 8) + 4 |
3839 __ push(lr); | 3849 __ push(lr); |
3840 #if !defined(__arm__) | 3850 #if !defined(__arm__) |
3841 // Notify the simulator of the transition to C code. | 3851 // Notify the simulator of the transition to C code. |
3842 __ swi(assembler::arm::call_rt_r5); | 3852 __ swi(assembler::arm::call_rt_r5); |
3843 #else /* !defined(__arm__) */ | 3853 #else /* !defined(__arm__) */ |
3844 __ mov(pc, Operand(r5)); | 3854 __ mov(pc, Operand(r5)); |
3845 #endif /* !defined(__arm__) */ | 3855 #endif /* !defined(__arm__) */ |
3846 // result is in r0 or r0:r1 - do not destroy these registers! | 3856 |
| 3857 if (always_allocate) { |
| 3858 // It's okay to clobber r2 and r3 here. Don't mess with r0 and r1 |
| 3859 // though (contain the result). |
| 3860 __ mov(r2, Operand(scope_depth)); |
| 3861 __ ldr(r3, MemOperand(r2)); |
| 3862 __ sub(r3, r3, Operand(1)); |
| 3863 __ str(r3, MemOperand(r2)); |
| 3864 } |
3847 | 3865 |
3848 // check for failure result | 3866 // check for failure result |
3849 Label failure_returned; | 3867 Label failure_returned; |
3850 ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); | 3868 ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
3851 // Lower 2 bits of r2 are 0 iff r0 has failure tag. | 3869 // Lower 2 bits of r2 are 0 iff r0 has failure tag. |
3852 __ add(r2, r0, Operand(1)); | 3870 __ add(r2, r0, Operand(1)); |
3853 __ tst(r2, Operand(kFailureTagMask)); | 3871 __ tst(r2, Operand(kFailureTagMask)); |
3854 __ b(eq, &failure_returned); | 3872 __ b(eq, &failure_returned); |
3855 | 3873 |
3856 // Exit C frame and return. | 3874 // Exit C frame and return. |
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3922 | 3940 |
3923 // Call into the runtime system. Collect garbage before the call if | 3941 // Call into the runtime system. Collect garbage before the call if |
3924 // running with --gc-greedy set. | 3942 // running with --gc-greedy set. |
3925 if (FLAG_gc_greedy) { | 3943 if (FLAG_gc_greedy) { |
3926 Failure* failure = Failure::RetryAfterGC(0); | 3944 Failure* failure = Failure::RetryAfterGC(0); |
3927 __ mov(r0, Operand(reinterpret_cast<intptr_t>(failure))); | 3945 __ mov(r0, Operand(reinterpret_cast<intptr_t>(failure))); |
3928 } | 3946 } |
3929 GenerateCore(masm, &throw_normal_exception, | 3947 GenerateCore(masm, &throw_normal_exception, |
3930 &throw_out_of_memory_exception, | 3948 &throw_out_of_memory_exception, |
3931 frame_type, | 3949 frame_type, |
3932 FLAG_gc_greedy); | 3950 FLAG_gc_greedy, |
| 3951 false); |
3933 | 3952 |
3934 // Do space-specific GC and retry runtime call. | 3953 // Do space-specific GC and retry runtime call. |
3935 GenerateCore(masm, | 3954 GenerateCore(masm, |
3936 &throw_normal_exception, | 3955 &throw_normal_exception, |
3937 &throw_out_of_memory_exception, | 3956 &throw_out_of_memory_exception, |
3938 frame_type, | 3957 frame_type, |
3939 true); | 3958 true, |
| 3959 false); |
3940 | 3960 |
3941 // Do full GC and retry runtime call one final time. | 3961 // Do full GC and retry runtime call one final time. |
3942 Failure* failure = Failure::InternalError(); | 3962 Failure* failure = Failure::InternalError(); |
3943 __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); | 3963 __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); |
3944 GenerateCore(masm, | 3964 GenerateCore(masm, |
3945 &throw_normal_exception, | 3965 &throw_normal_exception, |
3946 &throw_out_of_memory_exception, | 3966 &throw_out_of_memory_exception, |
3947 frame_type, | 3967 frame_type, |
| 3968 true, |
3948 true); | 3969 true); |
3949 | 3970 |
3950 __ bind(&throw_out_of_memory_exception); | 3971 __ bind(&throw_out_of_memory_exception); |
3951 GenerateThrowOutOfMemory(masm); | 3972 GenerateThrowOutOfMemory(masm); |
3952 // control flow for generated will not return. | 3973 // control flow for generated will not return. |
3953 | 3974 |
3954 __ bind(&throw_normal_exception); | 3975 __ bind(&throw_normal_exception); |
3955 GenerateThrowTOS(masm); | 3976 GenerateThrowTOS(masm); |
3956 } | 3977 } |
3957 | 3978 |
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4189 // Slow-case: Non-function called. | 4210 // Slow-case: Non-function called. |
4190 __ bind(&slow); | 4211 __ bind(&slow); |
4191 __ mov(r0, Operand(argc_)); // Setup the number of arguments. | 4212 __ mov(r0, Operand(argc_)); // Setup the number of arguments. |
4192 __ InvokeBuiltin(Builtins::CALL_NON_FUNCTION, JUMP_JS); | 4213 __ InvokeBuiltin(Builtins::CALL_NON_FUNCTION, JUMP_JS); |
4193 } | 4214 } |
4194 | 4215 |
4195 | 4216 |
4196 #undef __ | 4217 #undef __ |
4197 | 4218 |
4198 } } // namespace v8::internal | 4219 } } // namespace v8::internal |
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