135 lines
4.2 KiB
ArmAsm
135 lines
4.2 KiB
ArmAsm
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "asm_support_riscv64.S"
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UNDEFINED art_jni_method_start
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UNDEFINED art_jni_method_end
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UNDEFINED art_jni_read_barrier
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UNDEFINED art_jni_method_entry_hook
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UNDEFINED art_jni_lock_object_no_inline
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UNDEFINED art_jni_lock_object
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UNDEFINED art_jni_unlock_object_no_inline
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UNDEFINED art_jni_unlock_object
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// 8 argument GPRS: a0 - a7 and 8 argument FPRs: fa0 - fa7
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#define ALL_ARGS_SIZE (8 * (8 + 8))
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.macro SAVE_ALL_ARGS_INCREASE_FRAME extra_space
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// Reserve space for all argument registers, plus the extra space.
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INCREASE_FRAME (ALL_ARGS_SIZE + \extra_space)
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// Argument GPRs a0 - a7.
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SAVE_GPR a0, (8*0)
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SAVE_GPR a1, (8*1)
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SAVE_GPR a2, (8*2)
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SAVE_GPR a3, (8*3)
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SAVE_GPR a4, (8*4)
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SAVE_GPR a5, (8*5)
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SAVE_GPR a6, (8*6)
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SAVE_GPR a7, (8*7)
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// Argument FPRs fa0 - fa7.
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SAVE_FPR fa0, (8*8)
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SAVE_FPR fa1, (8*9)
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SAVE_FPR fa2, (8*10)
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SAVE_FPR fa3, (8*11)
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SAVE_FPR fa4, (8*12)
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SAVE_FPR fa5, (8*13)
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SAVE_FPR fa6, (8*14)
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SAVE_FPR fa7, (8*15)
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.endm
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.macro RESTORE_ALL_ARGS_DECREASE_FRAME extra_space
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// Argument GPRs a0 - a7.
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RESTORE_GPR a0, (8*0)
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RESTORE_GPR a1, (8*1)
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RESTORE_GPR a2, (8*2)
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RESTORE_GPR a3, (8*3)
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RESTORE_GPR a4, (8*4)
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RESTORE_GPR a5, (8*5)
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RESTORE_GPR a6, (8*6)
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RESTORE_GPR a7, (8*7)
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// Argument FPRs fa0 - fa7.
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RESTORE_FPR fa0, (8*8)
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RESTORE_FPR fa1, (8*9)
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RESTORE_FPR fa2, (8*10)
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RESTORE_FPR fa3, (8*11)
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RESTORE_FPR fa4, (8*12)
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RESTORE_FPR fa5, (8*13)
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RESTORE_FPR fa6, (8*14)
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RESTORE_FPR fa7, (8*15)
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DECREASE_FRAME (ALL_ARGS_SIZE + \extra_space)
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.endm
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// JNI dlsym lookup stub.
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.extern artFindNativeMethod
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.extern artFindNativeMethodRunnable
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ENTRY art_jni_dlsym_lookup_stub
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SAVE_ALL_ARGS_INCREASE_FRAME 2*8
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SAVE_GPR fp, (ALL_ARGS_SIZE + 0)
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SAVE_GPR ra, (ALL_ARGS_SIZE + 8)
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add fp, sp, ALL_ARGS_SIZE
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// Call artFindNativeMethod for normal native.
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// Call artFindNativeMethodRunnable for @FastNative or @CriticalNative.
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// Both functions have a single argument: Thread::Current() in a0.
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mv a0, xSELF
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ld t0, THREAD_TOP_QUICK_FRAME_OFFSET(a0) // uintptr_t tagged_quick_frame
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andi t0, t0, ~TAGGED_JNI_SP_MASK // ArtMethod** sp
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ld t0, (t0) // ArtMethod* method
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lw t0, ART_METHOD_ACCESS_FLAGS_OFFSET(t0) // uint32_t access_flags
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li t1, (ACCESS_FLAGS_METHOD_IS_FAST_NATIVE | ACCESS_FLAGS_METHOD_IS_CRITICAL_NATIVE)
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and t0, t0, t1
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bnez t0, .Llookup_stub_fast_or_critical_native
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call artFindNativeMethod
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j .Llookup_stub_continue
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.Llookup_stub_fast_or_critical_native:
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call artFindNativeMethodRunnable
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.Llookup_stub_continue:
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mv t0, a0 // store result in a temp reg.
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RESTORE_GPR fp, (ALL_ARGS_SIZE + 0)
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RESTORE_GPR ra, (ALL_ARGS_SIZE + 8)
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RESTORE_ALL_ARGS_DECREASE_FRAME 2*8
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beqz t0, 1f // is method code null?
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jr t0 // if non-null, tail call to method code.
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1:
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ret // restore regs and return to caller to handle exception.
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END art_jni_dlsym_lookup_stub
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// JNI dlsym lookup stub for @CriticalNative.
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ENTRY art_jni_dlsym_lookup_critical_stub
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// The hidden arg holding the tagged method is t6 (loaded by art_quick_generic_jni_trampoline).
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// Bit 0 set means generic JNI.
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// For generic JNI we already have a managed frame, so we reuse the art_jni_dlsym_lookup_stub.
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andi t6, t6, 1
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beqz t6, 1f
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j art_jni_dlsym_lookup_stub
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1:
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// TODO(riscv64): implement for code paths other than generic JNI trampoline.
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unimp
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END art_jni_dlsym_lookup_critical_stub
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