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_x86_64.S"
18
19    /*
20     * Jni dlsym lookup stub.
21     */
22DEFINE_FUNCTION art_jni_dlsym_lookup_stub
23    // Save callee and GPR args, mixed together to agree with core spills bitmap.
24    PUSH r9   // Arg.
25    PUSH r8   // Arg.
26    PUSH rdi  // JniEnv.
27    PUSH rsi  // Arg.
28    PUSH rdx  // Arg.
29    PUSH rcx  // Arg.
30    // Create space for FPR args, plus padding for alignment
31    subq LITERAL(72 + 4 * 8), %rsp
32    CFI_ADJUST_CFA_OFFSET(72 + 4 * 8)
33    // Save FPRs.
34    movq %xmm0, 0(%rsp)
35    movq %xmm1, 8(%rsp)
36    movq %xmm2, 16(%rsp)
37    movq %xmm3, 24(%rsp)
38    movq %xmm4, 32(%rsp)
39    movq %xmm5, 40(%rsp)
40    movq %xmm6, 48(%rsp)
41    movq %xmm7, 56(%rsp)
42    movq %xmm12, 64(%rsp)
43    movq %xmm13, 72(%rsp)
44    movq %xmm14, 80(%rsp)
45    movq %xmm15, 88(%rsp)
46    // prepare call
47    movq %gs:THREAD_SELF_OFFSET, %rdi      // RDI := Thread::Current()
48    // call
49    call PLT_SYMBOL(artFindNativeMethod)  // (Thread*)
50    // restore arguments
51    movq 0(%rsp), %xmm0
52    movq 8(%rsp), %xmm1
53    movq 16(%rsp), %xmm2
54    movq 24(%rsp), %xmm3
55    movq 32(%rsp), %xmm4
56    movq 40(%rsp), %xmm5
57    movq 48(%rsp), %xmm6
58    movq 56(%rsp), %xmm7
59    movq 64(%rsp), %xmm12
60    movq 72(%rsp), %xmm13
61    movq 80(%rsp), %xmm14
62    movq 88(%rsp), %xmm15
63    addq LITERAL(72 + 4 * 8), %rsp
64    CFI_ADJUST_CFA_OFFSET(-72 - 4 * 8)
65    POP rcx  // Arg.
66    POP rdx  // Arg.
67    POP rsi  // Arg.
68    POP rdi  // JniEnv.
69    POP r8   // Arg.
70    POP r9   // Arg.
71    testq %rax, %rax         // check if returned method code is null
72    jz .Lno_native_code_found     // if null, jump to return to handle
73    jmp *%rax                     // otherwise, tail call to intended method
74.Lno_native_code_found:
75    ret
76END_FUNCTION art_jni_dlsym_lookup_stub
77