1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/sparc/vm/stubRoutines_sparc.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,97 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// This file holds the platform specific parts of the StubRoutines
1.29 +// definition. See stubRoutines.hpp for a description on how to
1.30 +// extend it.
1.31 +
1.32 +
1.33 +// So unfortunately c2 will call with a pc from a frame object
1.34 +// (already adjusted) and a raw pc (unadjusted), so we need to check both.
1.35 +// It didn't use to be like this before adapter removal.
1.36 +static bool returns_to_call_stub(address return_pc) {
1.37 + return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
1.38 + (return_pc == _call_stub_return_address );
1.39 +}
1.40 +
1.41 +enum /* platform_dependent_constants */ {
1.42 + // %%%%%%%% May be able to shrink this a lot
1.43 + code_size1 = 20000, // simply increase if too small (assembler will crash if too small)
1.44 + code_size2 = 20000 // simply increase if too small (assembler will crash if too small)
1.45 +};
1.46 +
1.47 +class Sparc {
1.48 + friend class StubGenerator;
1.49 +
1.50 + public:
1.51 + enum { nof_instance_allocators = 10 };
1.52 +
1.53 + // allocator lock values
1.54 + enum {
1.55 + unlocked = 0,
1.56 + locked = 1
1.57 + };
1.58 +
1.59 + enum {
1.60 + v8_oop_lock_ignore_bits = 2,
1.61 + v8_oop_lock_bits = 4,
1.62 + nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),
1.63 + v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),
1.64 + v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits
1.65 + };
1.66 +
1.67 + static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
1.68 +
1.69 + private:
1.70 + static address _test_stop_entry;
1.71 + static address _stop_subroutine_entry;
1.72 + static address _flush_callers_register_windows_entry;
1.73 +
1.74 + static int _atomic_memory_operation_lock;
1.75 +
1.76 + static address _partial_subtype_check;
1.77 +
1.78 + public:
1.79 + // %%% global lock for everyone who needs to use atomic_compare_and_exchange
1.80 + // %%% or atomic_increment -- should probably use more locks for more
1.81 + // %%% scalability-- for instance one for each eden space or group of
1.82 +
1.83 + // address of the lock for atomic_compare_and_exchange
1.84 + static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
1.85 +
1.86 + // accessor and mutator for _atomic_memory_operation_lock
1.87 + static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }
1.88 + static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }
1.89 +
1.90 + // test assembler stop routine by setting registers
1.91 + static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
1.92 +
1.93 + // a subroutine for debugging assembler code
1.94 + static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; }
1.95 +
1.96 + // flushes (all but current) register window
1.97 + static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
1.98 +
1.99 + static address partial_subtype_check() { return _partial_subtype_check; }
1.100 +};
