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.S" 18 19 /* 20 * Portable resolution trampoline. 21 */ 22 DEFINE_FUNCTION art_jni_dlsym_lookup_stub 23 subl LITERAL(8), %esp // align stack 24 .cfi_adjust_cfa_offset 8 25 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 26 .cfi_adjust_cfa_offset 4 27 call SYMBOL(artFindNativeMethod) // (Thread*) 28 addl LITERAL(12), %esp // restore the stack 29 .cfi_adjust_cfa_offset -12 30 cmpl LITERAL(0), %eax // check if returned method code is null 31 je no_native_code_found // if null, jump to return to handle 32 jmp *%eax // otherwise, tail call to intended method 33 no_native_code_found: 34 ret 35 END_FUNCTION art_jni_dlsym_lookup_stub 36
