| Ian Rogers | 7655f29 | 2013-07-29 11:07:13 -0700 | [diff] [blame^] | 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 | mov r0, r9 @ pass Thread::Current |
| 32 | blx artFindNativeMethod @ (Thread*) |
| 33 | mov r12, r0 @ save result in r12 |
| 34 | add sp, #12 @ restore stack pointer |
| 35 | .cfi_adjust_cfa_offset -12 |
| 36 | pop {r0, r1, r2, r3, lr} @ restore regs |
| 37 | .cfi_adjust_cfa_offset -20 |
| 38 | cmp r12, #0 @ is method code null? |
| 39 | bxne r12 @ if non-null, tail call to method's code |
| 40 | bx lr @ otherwise, return to caller to handle exception |
| 41 | END art_jni_dlsym_lookup_stub |
| 42 | |
| 43 | /* |
| 44 | * Entry point of native methods when JNI bug compatibility is enabled. |
| 45 | */ |
| 46 | .extern artWorkAroundAppJniBugs |
| 47 | ENTRY art_quick_work_around_app_jni_bugs |
| 48 | @ save registers that may contain arguments and LR that will be crushed by a call |
| 49 | push {r0-r3, lr} |
| 50 | .save {r0-r3, lr} |
| 51 | .cfi_adjust_cfa_offset 16 |
| 52 | .cfi_rel_offset r0, 0 |
| 53 | .cfi_rel_offset r1, 4 |
| 54 | .cfi_rel_offset r2, 8 |
| 55 | .cfi_rel_offset r3, 12 |
| 56 | sub sp, #12 @ 3 words of space for alignment |
| 57 | mov r0, r9 @ pass Thread::Current |
| 58 | mov r1, sp @ pass SP |
| 59 | bl artWorkAroundAppJniBugs @ (Thread*, SP) |
| 60 | add sp, #12 @ rewind stack |
| 61 | mov r12, r0 @ save target address |
| 62 | pop {r0-r3, lr} @ restore possibly modified argument registers |
| 63 | .cfi_adjust_cfa_offset -16 |
| 64 | bx r12 @ tail call into JNI routine |
| 65 | END art_quick_work_around_app_jni_bugs |