1 /* 2 * Copyright (C) 2012 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_arm.S" 18 19 /* 20 * Jni dlsym lookup stub. 21 */ 22 .extern artFindNativeMethod 23 ENTRY art_jni_dlsym_lookup_stub 24 push {r0, r1, r2, r3, lr} @ spill regs 25 .cfi_adjust_cfa_offset 20 26 .cfi_rel_offset r0, 0 27 .cfi_rel_offset r1, 4 28 .cfi_rel_offset r2, 8 29 .cfi_rel_offset r3, 12 30 .cfi_rel_offset lr, 16 31 sub sp, #12 @ pad stack pointer to align frame 32 .cfi_adjust_cfa_offset 12 33 blx artFindNativeMethod 34 mov r12, r0 @ save result in r12 35 add sp, #12 @ restore stack pointer 36 .cfi_adjust_cfa_offset -12 37 cbz r0, 1f @ is method code null? 38 pop {r0, r1, r2, r3, lr} @ restore regs 39 .cfi_adjust_cfa_offset -20 40 .cfi_restore r0 41 .cfi_restore r1 42 .cfi_restore r2 43 .cfi_restore r3 44 .cfi_restore lr 45 bx r12 @ if non-null, tail call to method's code 46 1: 47 pop {r0, r1, r2, r3, pc} @ restore regs and return to caller to handle exception 48 END art_jni_dlsym_lookup_stub 49
