1 /*

     2  * Copyright (c) 2000, 2015, 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     return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());

    47   }

    48 

    49  public:

    50   // Mutators are highly dangerous....

    51   intptr_t* last_Java_fp()                       { return _anchor.last_Java_fp(); }

    52   void  set_last_Java_fp(intptr_t* fp)           { _anchor.set_last_Java_fp(fp);   }

    53 

    54   void set_base_of_stack_pointer(intptr_t* base_sp) {

    55   }

    56 

    57   static ByteSize last_Java_fp_offset()          {

    58     return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset();

    59   }

    60 

    61   intptr_t* base_of_stack_pointer() {

    62     return NULL;

    63   }

    64   void record_base_of_stack_pointer() {

    65   }

    66 

    67   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,

    68     bool isInJava);

    69 

    70   bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);

    71 private:

    72   bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava);

    73 public:

    74 

    75   static Thread *aarch64_get_thread_helper();

    76 

    77   // These routines are only used on cpu architectures that

    78   // have separate register stacks (Itanium).

    79   static bool register_stack_overflow() { return false; }

    80   static void enable_register_stack_guard() {}

    81   static void disable_register_stack_guard() {}

    82 

    83 #endif // OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP