1   /* Copyright (C) 2008 The Android Open Source Project
2    *
3    * Licensed under the Apache License, Version 2.0 (the "License");
4    * you may not use this file except in compliance with the License.
5    * You may obtain a copy of the License at
6    *
7    * http://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software
10    * distributed under the License is distributed on an "AS IS" BASIS,
11    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12    * See the License for the specific language governing permissions and
13    * limitations under the License.
14    */
15
16   /*
17    * File: OP_MONITOR_ENTER.S
18    *
19    * Code: Aquire a monitor
20    *
21    * For: monitor-enter
22    *
23    * Description: Aquire a monitor for the indicated object.
24    *
25    *
26    *
27    * Format: AA|op (11x)
28    *
29    * Syntax: op vAA
30    */
31
32    movl        rGLUE, %eax             # %eax<- pMterpGlue
33    GET_VREG    rINST                   # rINST<- vAA
34    cmp         $$0, rINST              # check for null object
35    movl        offGlue_self(%eax), %eax # %eax<- glue->self
36#ifdef WITH_MONITOR_TRACKING
37    EXPORT_PC   # export PC so we can grab stack trace
38#endif
39    je          common_errNullObject    # handle null object
40#    jmp         .L${opcode}_finish
41#%break
42#.L${opcode}_finish:
43    movl        rINST, -4(%esp)         # push parameter reference
44    movl        %eax, -8(%esp)          # push parameter
45    lea         -8(%esp), %esp
46    call        dvmLockObject           # call: (struct Thread* self,
47                                        #       struct Object* obj)
48                                        # return: void
49    FFETCH_ADV  1, %edx                 # %edx<- next instruction hi; fetch, advance
50    lea         8(%esp), %esp
51#ifdef WITH_DEADLOCK_PREDICTION
52    movl        rGLUE, %eax             # %eax<- pMterpGlue
53    movl        offGlue_self(%eax), %eax # %eax<- glue->self
54    movl        offThread_exception(%eax), %eax # %eax<- glue->self->exception
55    cmp         $$0, %eax               # check for exception
56    jne         common_exceptionThrown  # handle exception
57#endif
58    FGETOP_JMP  1, %edx                 # jump to next instruction; getop, jmp
59
60