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42a4f53d2b
This commit applies all changes made after running the gdb/copyright.py script. Note that one file was flagged by the script, due to an invalid copyright header (gdb/unittests/basic_string_view/element_access/char/empty.cc). As the file was copied from GCC's libstdc++-v3 testsuite, this commit leaves this file untouched for the time being; a patch to fix the header was sent to gcc-patches first. gdb/ChangeLog: Update copyright year range in all GDB files.
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
/* Common target-dependent functionality for RISC-V
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Copyright (C) 2018-2019 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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#ifndef ARCH_RISCV_H
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#define ARCH_RISCV_H
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#include "common/tdesc.h"
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/* The set of RISC-V architectural features that we track that impact how
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we configure the actual gdbarch instance. We hold one of these in the
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gdbarch_tdep structure, and use it to distinguish between different
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RISC-V gdbarch instances.
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The information in here ideally comes from the target description,
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however, if the target doesn't provide a target description then we will
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create a default target description by first populating one of these
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based on what we know about the binary being executed, and using that to
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drive default target description creation. */
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struct riscv_gdbarch_features
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{
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/* The size of the x-registers in bytes. This is either 4 (RV32), 8
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(RV64), or 16 (RV128). No other value is valid. Initialise to the
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invalid 0 value so we can spot if one of these is used
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uninitialised. */
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int xlen = 0;
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/* The size of the f-registers in bytes. This is either 4 (RV32), 8
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(RV64), or 16 (RV128). This can also hold the value 0 to indicate
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that there are no f-registers. No other value is valid. */
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int flen = 0;
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/* This indicates if hardware floating point abi is in use. If the FLEN
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field is 0 then this value _must_ be false. If the FLEN field is
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non-zero and this field is false then this indicates the target has
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floating point registers, but is still using the soft-float abi. If
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this field is true then the hardware floating point abi is in use, and
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values are passed in f-registers matching the size of FLEN. */
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bool hw_float_abi = false;
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/* Equality operator. */
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bool operator== (const struct riscv_gdbarch_features &rhs) const
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{
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return (xlen == rhs.xlen && flen == rhs.flen
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&& hw_float_abi == rhs.hw_float_abi);
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}
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/* Inequality operator. */
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bool operator!= (const struct riscv_gdbarch_features &rhs) const
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{
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return !((*this) == rhs);
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}
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/* Used by std::unordered_map to hash feature sets. */
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std::size_t hash () const noexcept
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{
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std::size_t val = ((xlen & 0x1f) << 6
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| (flen & 0x1f) << 1
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| (hw_float_abi ? 1 : 0));
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return val;
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}
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};
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/* Create and return a target description that is compatible with
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FEATURES. */
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const target_desc *riscv_create_target_description
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(struct riscv_gdbarch_features features);
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#endif /* ARCH_RISCV_H */
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