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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/* GNU/Linux/RISC-V native target description support for GDB.
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Copyright (C) 2020-2021 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 "gdb_proc_service.h"
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#include "arch/riscv.h"
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#include "elf/common.h"
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#include "nat/gdb_ptrace.h"
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#include "nat/riscv-linux-tdesc.h"
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#include <sys/uio.h>
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/* Work around glibc header breakage causing ELF_NFPREG not to be usable. */
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#ifndef NFPREG
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# define NFPREG 33
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#endif
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/* See nat/riscv-linux-tdesc.h. */
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struct riscv_gdbarch_features
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riscv_linux_read_features (int tid)
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{
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struct riscv_gdbarch_features features;
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elf_fpregset_t regs;
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int flen;
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/* Figuring out xlen is easy. */
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features.xlen = sizeof (elf_greg_t);
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/* Start with no f-registers. */
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features.flen = 0;
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/* How much worth of f-registers can we fetch if any? */
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for (flen = sizeof (regs.__f.__f[0]); ; flen *= 2)
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{
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size_t regset_size;
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struct iovec iov;
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/* Regsets have a uniform slot size, so we count FSCR like
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an FP data register. */
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regset_size = ELF_NFPREG * flen;
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if (regset_size > sizeof (regs))
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break;
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iov.iov_base = ®s;
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iov.iov_len = regset_size;
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if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET,
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(PTRACE_TYPE_ARG3) &iov) == -1)
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{
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switch (errno)
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{
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case EINVAL:
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continue;
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case EIO:
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break;
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default:
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perror_with_name (_("Couldn't get registers"));
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break;
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}
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}
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else
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features.flen = flen;
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break;
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}
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return features;
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}
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