| /* Copyright (C) 2018-2021 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "gdbsupport/common-defs.h" |
| #include "riscv.h" |
| #include <stdlib.h> |
| #include <unordered_map> |
| |
| #include "../features/riscv/32bit-cpu.c" |
| #include "../features/riscv/64bit-cpu.c" |
| #include "../features/riscv/32bit-fpu.c" |
| #include "../features/riscv/64bit-fpu.c" |
| #include "../features/riscv/rv32e-xregs.c" |
| |
| #ifndef GDBSERVER |
| #define STATIC_IN_GDB static |
| #else |
| #define STATIC_IN_GDB |
| #endif |
| |
| /* See arch/riscv.h. */ |
| |
| STATIC_IN_GDB target_desc_up |
| riscv_create_target_description (const struct riscv_gdbarch_features features) |
| { |
| /* Now we should create a new target description. */ |
| target_desc_up tdesc = allocate_target_description (); |
| |
| #ifndef IN_PROCESS_AGENT |
| std::string arch_name = "riscv"; |
| |
| if (features.xlen == 4) |
| { |
| if (features.embedded) |
| arch_name.append (":rv32e"); |
| else |
| arch_name.append (":rv32i"); |
| } |
| else if (features.xlen == 8) |
| arch_name.append (":rv64i"); |
| else if (features.xlen == 16) |
| arch_name.append (":rv128i"); |
| |
| if (features.flen == 4) |
| arch_name.append ("f"); |
| else if (features.flen == 8) |
| arch_name.append ("d"); |
| else if (features.flen == 16) |
| arch_name.append ("q"); |
| |
| set_tdesc_architecture (tdesc.get (), arch_name.c_str ()); |
| #endif |
| |
| long regnum = 0; |
| |
| /* For now we only support creating 32-bit or 64-bit x-registers. */ |
| if (features.xlen == 4) |
| { |
| if (features.embedded) |
| regnum = create_feature_riscv_rv32e_xregs (tdesc.get (), regnum); |
| else |
| regnum = create_feature_riscv_32bit_cpu (tdesc.get (), regnum); |
| } |
| else if (features.xlen == 8) |
| regnum = create_feature_riscv_64bit_cpu (tdesc.get (), regnum); |
| |
| /* For now we only support creating 32-bit or 64-bit f-registers. */ |
| if (features.flen == 4) |
| regnum = create_feature_riscv_32bit_fpu (tdesc.get (), regnum); |
| else if (features.flen == 8) |
| regnum = create_feature_riscv_64bit_fpu (tdesc.get (), regnum); |
| |
| /* Currently GDB only supports vector features coming from remote |
| targets. We don't support creating vector features on native targets |
| (yet). */ |
| if (features.vlen != 0) |
| error (_("unable to create vector feature")); |
| |
| return tdesc; |
| } |
| |
| #ifndef GDBSERVER |
| |
| /* Wrapper used by std::unordered_map to generate hash for feature set. */ |
| struct riscv_gdbarch_features_hasher |
| { |
| std::size_t |
| operator() (const riscv_gdbarch_features &features) const noexcept |
| { |
| return features.hash (); |
| } |
| }; |
| |
| /* Cache of previously seen target descriptions, indexed by the feature set |
| that created them. */ |
| static std::unordered_map<riscv_gdbarch_features, |
| const target_desc_up, |
| riscv_gdbarch_features_hasher> riscv_tdesc_cache; |
| |
| /* See arch/riscv.h. */ |
| |
| const target_desc * |
| riscv_lookup_target_description (const struct riscv_gdbarch_features features) |
| { |
| /* Lookup in the cache. If we find it then return the pointer out of |
| the target_desc_up (which is a unique_ptr). This is safe as the |
| riscv_tdesc_cache will exist until GDB exits. */ |
| const auto it = riscv_tdesc_cache.find (features); |
| if (it != riscv_tdesc_cache.end ()) |
| return it->second.get (); |
| |
| target_desc_up tdesc (riscv_create_target_description (features)); |
| |
| /* Add to the cache, and return a pointer borrowed from the |
| target_desc_up. This is safe as the cache (and the pointers |
| contained within it) are not deleted until GDB exits. */ |
| target_desc *ptr = tdesc.get (); |
| riscv_tdesc_cache.emplace (features, std::move (tdesc)); |
| return ptr; |
| } |
| |
| #endif /* !GDBSERVER */ |