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/*
* 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 // JniEnv.
PUSH rsi // Arg.
PUSH rdx // Arg.
PUSH rcx // Arg.
// Create space for FPR args, plus padding for alignment
subq LITERAL(72 + 4 * 8), %rsp
CFI_ADJUST_CFA_OFFSET(72 + 4 * 8)
// 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)
movq %xmm12, 64(%rsp)
movq %xmm13, 72(%rsp)
movq %xmm14, 80(%rsp)
movq %xmm15, 88(%rsp)
// prepare call
movq %gs:THREAD_SELF_OFFSET, %rdi // RDI := 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
movq 64(%rsp), %xmm12
movq 72(%rsp), %xmm13
movq 80(%rsp), %xmm14
movq 88(%rsp), %xmm15
addq LITERAL(72 + 4 * 8), %rsp
CFI_ADJUST_CFA_OFFSET(-72 - 4 * 8)
POP rcx // Arg.
POP rdx // Arg.
POP rsi // Arg.
POP rdi // JniEnv.
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