mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
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.
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/* GNU/Linux/RISC-V native target description support for GDB.
|
|
Copyright (C) 2020-2022 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 "gdb_proc_service.h"
|
|
#include "arch/riscv.h"
|
|
#include "elf/common.h"
|
|
#include "nat/gdb_ptrace.h"
|
|
#include "nat/riscv-linux-tdesc.h"
|
|
|
|
#include <sys/uio.h>
|
|
|
|
/* Work around glibc header breakage causing ELF_NFPREG not to be usable. */
|
|
#ifndef NFPREG
|
|
# define NFPREG 33
|
|
#endif
|
|
|
|
/* See nat/riscv-linux-tdesc.h. */
|
|
|
|
struct riscv_gdbarch_features
|
|
riscv_linux_read_features (int tid)
|
|
{
|
|
struct riscv_gdbarch_features features;
|
|
elf_fpregset_t regs;
|
|
int flen;
|
|
|
|
/* Figuring out xlen is easy. */
|
|
features.xlen = sizeof (elf_greg_t);
|
|
|
|
/* Start with no f-registers. */
|
|
features.flen = 0;
|
|
|
|
/* How much worth of f-registers can we fetch if any? */
|
|
for (flen = sizeof (regs.__f.__f[0]); ; flen *= 2)
|
|
{
|
|
size_t regset_size;
|
|
struct iovec iov;
|
|
|
|
/* Regsets have a uniform slot size, so we count FSCR like
|
|
an FP data register. */
|
|
regset_size = ELF_NFPREG * flen;
|
|
if (regset_size > sizeof (regs))
|
|
break;
|
|
|
|
iov.iov_base = ®s;
|
|
iov.iov_len = regset_size;
|
|
if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET,
|
|
(PTRACE_TYPE_ARG3) &iov) == -1)
|
|
{
|
|
switch (errno)
|
|
{
|
|
case EINVAL:
|
|
continue;
|
|
case EIO:
|
|
break;
|
|
default:
|
|
perror_with_name (_("Couldn't get registers"));
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
features.flen = flen;
|
|
break;
|
|
}
|
|
|
|
return features;
|
|
}
|