1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "asm_support_arm64.S" 18 19 /* 20 * Jni dlsym lookup stub. 21 */ 22 .extern artFindNativeMethod 23 24 // TODO: Add CFI directives. 25 ENTRY art_jni_dlsym_lookup_stub 26 // spill regs. 27 stp x29, x30, [sp, #-16]! 28 mov x29, sp 29 stp d6, d7, [sp, #-16]! 30 stp d4, d5, [sp, #-16]! 31 stp d2, d3, [sp, #-16]! 32 stp d0, d1, [sp, #-16]! 33 stp x6, x7, [sp, #-16]! 34 stp x4, x5, [sp, #-16]! 35 stp x2, x3, [sp, #-16]! 36 stp x0, x1, [sp, #-16]! 37 38 bl artFindNativeMethod 39 mov x17, x0 // store result in scratch reg. 40 41 // load spill regs. 42 ldp x0, x1, [sp], #16 43 ldp x2, x3, [sp], #16 44 ldp x4, x5, [sp], #16 45 ldp x6, x7, [sp], #16 46 ldp d0, d1, [sp], #16 47 ldp d2, d3, [sp], #16 48 ldp d4, d5, [sp], #16 49 ldp d6, d7, [sp], #16 50 ldp x29, x30, [sp], #16 51 52 cbz x17, 1f // is method code null ? 53 br x17 // if non-null, tail call to method's code. 54 55 1: 56 ret // restore regs and return to caller to handle exception. 57 END art_jni_dlsym_lookup_stub 58
