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 .save {r0, r1, r2, r3, lr} 26 .pad #20 27 .cfi_adjust_cfa_offset 20 28 sub sp, #12 @ pad stack pointer to align frame 29 .pad #12 30 .cfi_adjust_cfa_offset 12 31 blx artFindNativeMethod 32 mov r12, r0 @ save result in r12 33 add sp, #12 @ restore stack pointer 34 .cfi_adjust_cfa_offset -12 35 cbz r0, 1f @ is method code null? 36 pop {r0, r1, r2, r3, lr} @ restore regs 37 .cfi_adjust_cfa_offset -20 38 bx r12 @ if non-null, tail call to method's code 39 1: 40 .cfi_adjust_cfa_offset 20 41 pop {r0, r1, r2, r3, pc} @ restore regs and return to caller to handle exception 42 .cfi_adjust_cfa_offset -20 43 END art_jni_dlsym_lookup_stub 44 45 /* 46 * Entry point of native methods when JNI bug compatibility is enabled. 47 */ 48 .extern artWorkAroundAppJniBugs 49 ENTRY art_work_around_app_jni_bugs 50 @ save registers that may contain arguments and LR that will be crushed by a call 51 push {r0-r3, lr} 52 .save {r0-r3, lr} 53 .cfi_adjust_cfa_offset 16 54 .cfi_rel_offset r0, 0 55 .cfi_rel_offset r1, 4 56 .cfi_rel_offset r2, 8 57 .cfi_rel_offset r3, 12 58 sub sp, #12 @ 3 words of space for alignment 59 mov r0, r9 @ pass Thread::Current 60 mov r1, sp @ pass SP 61 bl artWorkAroundAppJniBugs @ (Thread*, SP) 62 add sp, #12 @ rewind stack 63 mov r12, r0 @ save target address 64 pop {r0-r3, lr} @ restore possibly modified argument registers 65 .cfi_adjust_cfa_offset -16 66 bx r12 @ tail call into JNI routine 67 END art_work_around_app_jni_bugs 68
