jni_entrypoints_arm.S revision 7fae7c40e62ffe669fc224c57ed530b4d9c8da2c 
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
23ENTRY 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
461:
47    pop    {r0, r1, r2, r3, pc}           @ restore regs and return to caller to handle exception
48END art_jni_dlsym_lookup_stub
49