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151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
/* Native-dependent code for FreeBSD/arm.
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Copyright (C) 2017-2020 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 "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 "fbsd-nat.h"
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#include "arm-tdep.h"
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#include "arm-fbsd-tdep.h"
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#include "inf-ptrace.h"
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struct arm_fbsd_nat_target : public fbsd_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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const struct target_desc *read_description () override;
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};
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static arm_fbsd_nat_target the_arm_fbsd_nat_target;
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/* Determine if PT_GETREGS fetches REGNUM. */
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static bool
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getregs_supplies (int regnum)
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{
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return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM)
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|| regnum == ARM_PS_REGNUM);
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}
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#ifdef PT_GETVFPREGS
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/* Determine if PT_GETVFPREGS fetches REGNUM. */
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static bool
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getvfpregs_supplies (int regnum)
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{
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return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM)
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|| regnum == ARM_FPSCR_REGNUM);
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}
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#endif
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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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arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
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{
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pid_t pid = get_ptrace_pid (regcache->ptid ());
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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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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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regcache->supply_regset (&arm_fbsd_gregset, regnum, ®s,
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sizeof (regs));
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}
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#ifdef PT_GETVFPREGS
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if (regnum == -1 || getvfpregs_supplies (regnum))
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{
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struct vfpreg vfpregs;
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if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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regcache->supply_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
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sizeof (vfpregs));
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}
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#endif
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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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void
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arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
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{
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pid_t pid = get_ptrace_pid (regcache->ptid ());
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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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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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regcache->collect_regset (&arm_fbsd_gregset, regnum, ®s,
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sizeof (regs));
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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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#ifdef PT_GETVFPREGS
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if (regnum == -1 || getvfpregs_supplies (regnum))
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{
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struct vfpreg vfpregs;
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if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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regcache->collect_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
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sizeof (vfpregs));
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if (ptrace (PT_SETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
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perror_with_name (_("Couldn't write floating point status"));
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}
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#endif
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}
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/* Implement the to_read_description method. */
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const struct target_desc *
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arm_fbsd_nat_target::read_description ()
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{
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const struct target_desc *desc;
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desc = arm_fbsd_read_description_auxv (this);
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if (desc == NULL)
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desc = this->beneath ()->read_description ();
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return desc;
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}
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void
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_initialize_arm_fbsd_nat (void)
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{
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add_inf_child_target (&the_arm_fbsd_nat_target);
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}
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