| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "asm_support_x86_64.S" |
| |
| /* |
| * Jni dlsym lookup stub. |
| */ |
| DEFINE_FUNCTION art_jni_dlsym_lookup_stub |
| // Save callee and GPR args, mixed together to agree with core spills bitmap. |
| PUSH r9 // Arg. |
| PUSH r8 // Arg. |
| PUSH rdi // |
| PUSH rsi // Arg. |
| PUSH rdx // Arg. |
| PUSH rcx // Arg. |
| // Create space for FPR args, plus padding for alignment |
| subq LITERAL(72), %rsp |
| CFI_ADJUST_CFA_OFFSET(72) |
| // Save FPRs. |
| movq %xmm0, 0(%rsp) |
| movq %xmm1, 8(%rsp) |
| movq %xmm2, 16(%rsp) |
| movq %xmm3, 24(%rsp) |
| movq %xmm4, 32(%rsp) |
| movq %xmm5, 40(%rsp) |
| movq %xmm6, 48(%rsp) |
| movq %xmm7, 56(%rsp) |
| // prepare call |
| movq %gs:THREAD_SELF_OFFSET, %rsi // RSI := Thread::Current() |
| // call |
| call PLT_SYMBOL(artFindNativeMethod) // (Thread*) |
| // restore arguments |
| movq 0(%rsp), %xmm0 |
| movq 8(%rsp), %xmm1 |
| movq 16(%rsp), %xmm2 |
| movq 24(%rsp), %xmm3 |
| movq 32(%rsp), %xmm4 |
| movq 40(%rsp), %xmm5 |
| movq 48(%rsp), %xmm6 |
| movq 56(%rsp), %xmm7 |
| addq LITERAL(72), %rsp |
| CFI_ADJUST_CFA_OFFSET(-72) |
| POP rcx // Arg. |
| POP rdx // Arg. |
| POP rsi // Arg. |
| POP rdi // |
| POP r8 // Arg. |
| POP r9 // Arg. |
| testq %rax, %rax // check if returned method code is null |
| jz .Lno_native_code_found // if null, jump to return to handle |
| jmp *%rax // otherwise, tail call to intended method |
| .Lno_native_code_found: |
| ret |
| END_FUNCTION art_jni_dlsym_lookup_stub |
