124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
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/* Native-dependent code for OpenBSD/mips64.
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Copyright (C) 2004-2022 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 "defs.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "target.h"
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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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#include "mips-tdep.h"
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#include "inf-ptrace.h"
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#include "obsd-nat.h"
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/* Shorthand for some register numbers used below. */
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#define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM
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#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
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#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
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struct mips64_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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static mips64_obsd_nat_target the_mips64_obsd_nat_target;
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/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
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static void
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mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs)
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{
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const char *regs = gregs;
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int regnum;
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for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++)
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regcache->raw_supply (regnum, regs + regnum * 8);
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for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++)
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regcache->raw_supply (regnum, regs + (regnum + 2) * 8);
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}
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/* Collect the general-purpose registers from REGCACHE and store them
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in GREGS. */
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static void
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mips64obsd_collect_gregset (const struct regcache *regcache,
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void *gregs, int regnum)
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{
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char *regs = gregs;
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int i;
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for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++)
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{
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if (regnum == -1 || regnum == i)
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regcache->raw_collect (i, regs + i * 8);
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}
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for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
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{
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if (regnum == -1 || regnum == i)
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regcache->raw_collect (i, regs + (i + 2) * 8);
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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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void
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mips64_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
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{
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struct reg regs;
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pid_t pid = regcache->ptid ().pid ();
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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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mips64obsd_supply_gregset (regcache, ®s);
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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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static void
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mips64_obsd_nat_target::store_registers (struct regcache *regcache, int regnum)
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{
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struct reg regs;
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pid_t pid = regcache->ptid ().pid ();
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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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mips64obsd_collect_gregset (regcache, ®s, regnum);
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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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void _initialize_mips64obsd_nat ();
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void
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_initialize_mips64obsd_nat ()
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{
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add_inf_child_target (&the_mips64_obsd_nat_target);
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}
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