140 lines
4 KiB
Text
140 lines
4 KiB
Text
Index: gdb/riscv-obsd-nat.c
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--- gdb/riscv-obsd-nat.c.orig
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+++ gdb/riscv-obsd-nat.c
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@@ -0,0 +1,136 @@
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+/* Native-dependent code for OpenBSD/riscv64.
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+
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+ Copyright (C) 2018-2021 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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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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+
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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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+
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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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+
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+#include "defs.h"
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+#include "regcache.h"
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+#include "target.h"
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+
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+#include <sys/types.h>
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+#include <sys/ptrace.h>
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+#include <machine/reg.h>
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+
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+#include "obsd-nat.h"
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+#include "riscv-tdep.h"
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+#include "riscv-obsd-tdep.h"
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+#include "inf-ptrace.h"
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+
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+struct riscv_obsd_nat_target final : public obsd_nat_target
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+{
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+ void fetch_registers (struct regcache *, int) override;
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+ void store_registers (struct regcache *, int) override;
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+};
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+
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+static riscv_obsd_nat_target the_riscv_obsd_nat_target;
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+
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+/* Determine if PT_GETREGS fetches REGNUM. */
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+
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+static bool
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+getregs_supplies (int regnum)
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+{
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+ return ((regnum >= RISCV_RA_REGNUM && regnum <= RISCV_PC_REGNUM)
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+ || regnum == RISCV_CSR_SSTATUS_REGNUM);
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+}
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+
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+/* Determine if PT_GETFPREGS fetches REGNUM. */
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+
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+static bool
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+getfpregs_supplies (int regnum)
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+{
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+ return ((regnum >= RISCV_FIRST_FP_REGNUM && regnum <= RISCV_LAST_FP_REGNUM)
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+ || regnum == RISCV_CSR_FCSR_REGNUM);
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+}
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+
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+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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+ for all registers. */
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+
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+void
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+riscv_obsd_nat_target::fetch_registers (struct regcache *regcache,
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+ int regnum)
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+{
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+ pid_t pid = get_ptrace_pid (regcache->ptid ());
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+
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+ if (regnum == -1 || regnum == RISCV_ZERO_REGNUM)
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+ regcache->raw_supply_zeroed (RISCV_ZERO_REGNUM);
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+ if (regnum == -1 || getregs_supplies (regnum))
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+ {
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+ struct reg regs;
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+
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+ if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ regcache->supply_regset (&riscv_obsd_gregset, regnum, ®s,
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+ sizeof (regs));
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+ }
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+
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+ if (regnum == -1 || getfpregs_supplies (regnum))
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+ {
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+ struct fpreg fpregs;
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+
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+ if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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+ perror_with_name (_("Couldn't get floating point status"));
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+
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+ regcache->supply_regset (&riscv_obsd_fpregset, regnum, &fpregs,
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+ sizeof (fpregs));
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+ }
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+}
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+
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+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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+ this for all registers. */
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+
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+void
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+riscv_obsd_nat_target::store_registers (struct regcache *regcache,
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+ int regnum)
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+{
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+ pid_t pid = get_ptrace_pid (regcache->ptid ());
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+
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+ if (regnum == -1 || getregs_supplies (regnum))
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+ {
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+ struct reg regs;
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+
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+ if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ regcache->collect_regset (&riscv_obsd_gregset, regnum, ®s,
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+ sizeof (regs));
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+
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+ if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't write registers"));
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+ }
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+
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+ if (regnum == -1 || getfpregs_supplies (regnum))
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+ {
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+ struct fpreg fpregs;
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+
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+ if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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+ perror_with_name (_("Couldn't get floating point status"));
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+
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+ regcache->collect_regset (&riscv_obsd_fpregset, regnum, &fpregs,
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+ sizeof (fpregs));
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+
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+ if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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+ perror_with_name (_("Couldn't write floating point status"));
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+ }
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+}
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+
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+void _initialize_riscv_obsd_nat ();
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+void
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+_initialize_riscv_obsd_nat ()
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+{
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+ add_inf_child_target (&the_riscv_obsd_nat_target);
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+}
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