1 /* 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP 27 #define OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP 28 29 private: 30 #ifdef ASSERT 31 // spill stack holds N callee-save registers at each Java call and 32 // grows downwards towards limit 33 // we need limit to check we have space for a spill and base so we 34 // can identify all live spill frames at GC (eventually) 35 address _spill_stack; 36 address _spill_stack_base; 37 address _spill_stack_limit; 38 #endif // ASSERT 39 40 void pd_initialize() { 41 _anchor.clear(); 42 } 43 44 frame pd_last_frame() { 45 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); 46 if (_anchor.last_Java_pc() != NULL) { 47 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc()); 48 } else { 49 // This will pick up pc from sp 50 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp()); 51 } 52 } 53 54 public: 55 // Mutators are highly dangerous.... 56 intptr_t* last_Java_fp() { return _anchor.last_Java_fp(); } 57 void set_last_Java_fp(intptr_t* fp) { _anchor.set_last_Java_fp(fp); } 58 59 void set_base_of_stack_pointer(intptr_t* base_sp) { 60 } 61 62 static ByteSize last_Java_fp_offset() { 63 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset(); 64 } 65 66 intptr_t* base_of_stack_pointer() { 67 return NULL; 68 } 69 void record_base_of_stack_pointer() { 70 } 71 72 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, 73 bool isInJava); 74 75 bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava); 76 private: 77 bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava); 78 public: 79 80 // These routines are only used on cpu architectures that 81 // have separate register stacks (Itanium). 82 static bool register_stack_overflow() { return false; } 83 static void enable_register_stack_guard() {} 84 static void disable_register_stack_guard() {} 85 86 #endif // OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP