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4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* Copyright (C) 2017-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "gdbsupport/common-defs.h"
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#include "arc.h"
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#include <stdlib.h>
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#include <unordered_map>
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#include <string>
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/* Target description features. */
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#include "features/arc/v1-core.c"
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#include "features/arc/v1-aux.c"
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#include "features/arc/v2-core.c"
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#include "features/arc/v2-aux.c"
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#ifndef GDBSERVER
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#define STATIC_IN_GDB static
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#else
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#define STATIC_IN_GDB
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#endif
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STATIC_IN_GDB target_desc_up
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arc_create_target_description (const struct arc_arch_features &features)
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{
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/* Create a new target description. */
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target_desc_up tdesc = allocate_target_description ();
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#ifndef IN_PROCESS_AGENT
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std::string arch_name;
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/* Architecture names here must match the ones in
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ARCH_INFO_STRUCT in bfd/cpu-arc.c. */
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if (features.isa == ARC_ISA_ARCV1 && features.reg_size == 4)
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arch_name = "arc:ARC700";
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else if (features.isa == ARC_ISA_ARCV2 && features.reg_size == 4)
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arch_name = "arc:ARCv2";
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else
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{
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std::string msg = string_printf
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("Cannot determine architecture: ISA=%d; bitness=%d",
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features.isa, 8 * features.reg_size);
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gdb_assert_not_reached ("%s", msg.c_str ());
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}
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set_tdesc_architecture (tdesc.get (), arch_name.c_str ());
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#endif
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long regnum = 0;
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switch (features.isa)
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{
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case ARC_ISA_ARCV1:
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regnum = create_feature_arc_v1_core (tdesc.get (), regnum);
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regnum = create_feature_arc_v1_aux (tdesc.get (), regnum);
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break;
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case ARC_ISA_ARCV2:
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regnum = create_feature_arc_v2_core (tdesc.get (), regnum);
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regnum = create_feature_arc_v2_aux (tdesc.get (), regnum);
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break;
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default:
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std::string msg = string_printf
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("Cannot choose target description XML: %d", features.isa);
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gdb_assert_not_reached ("%s", msg.c_str ());
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}
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return tdesc;
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}
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#ifndef GDBSERVER
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/* Wrapper used by std::unordered_map to generate hash for features set. */
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struct arc_arch_features_hasher
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{
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std::size_t
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operator() (const arc_arch_features &features) const noexcept
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{
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return features.hash ();
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}
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};
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/* Cache of previously created target descriptions, indexed by the hash
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of the features set used to create them. */
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static std::unordered_map<arc_arch_features,
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const target_desc_up,
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arc_arch_features_hasher> arc_tdesc_cache;
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/* See arch/arc.h. */
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const target_desc *
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arc_lookup_target_description (const struct arc_arch_features &features)
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{
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/* Lookup in the cache first. If found, return the pointer from the
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"target_desc_up" type which is a "unique_ptr". This should be fine
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as the "arc_tdesc_cache" will persist until GDB terminates. */
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const auto it = arc_tdesc_cache.find (features);
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if (it != arc_tdesc_cache.end ())
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return it->second.get ();
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target_desc_up tdesc = arc_create_target_description (features);
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/* Add to the cache, and return a pointer borrowed from the
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target_desc_up. This is safe as the cache (and the pointers
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contained within it) are not deleted until GDB exits. */
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target_desc *ptr = tdesc.get ();
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arc_tdesc_cache.emplace (features, std::move (tdesc));
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return ptr;
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}
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#endif /* !GDBSERVER */
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