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- /* Native-dependent code for modern VAX BSD's.
- Copyright (C) 2004-2022 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/>. */
- /* We define this to get types like register_t. */
- #define _KERNTYPES
- #include "defs.h"
- #include "inferior.h"
- #include "regcache.h"
- #include "target.h"
- #include <sys/types.h>
- #include <sys/ptrace.h>
- #include <machine/reg.h>
- #include "vax-tdep.h"
- #include "inf-ptrace.h"
- #include "netbsd-nat.h"
- struct vax_bsd_nat_target final : public nbsd_nat_target
- {
- void fetch_registers (struct regcache *, int) override;
- void store_registers (struct regcache *, int) override;
- };
- static vax_bsd_nat_target the_vax_bsd_nat_target;
- /* Supply the general-purpose registers stored in GREGS to REGCACHE. */
- static void
- vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs)
- {
- const gdb_byte *regs = (const gdb_byte *)gregs;
- int regnum;
- for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
- regcache->raw_supply (regnum, regs + regnum * 4);
- }
- /* Collect the general-purpose registers from REGCACHE and store them
- in GREGS. */
- static void
- vaxbsd_collect_gregset (const struct regcache *regcache,
- void *gregs, int regnum)
- {
- gdb_byte *regs = (void *)gregs;
- int i;
- for (i = 0; i <= VAX_NUM_REGS; i++)
- {
- if (regnum == -1 || regnum == i)
- regcache->raw_collect (i, regs + i * 4);
- }
- }
- /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
- for all registers. */
- void
- vax_bsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
- {
- struct reg regs;
- pid_t pid = regcache->ptid ().pid ();
- int lwp = regcache->ptid ().lwp ();
- if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
- perror_with_name (_("Couldn't get registers"));
- vaxbsd_supply_gregset (regcache, ®s);
- }
- /* Store register REGNUM back into the inferior. If REGNUM is -1, do
- this for all registers. */
- void
- vax_bsd_nat_target::store_registers (struct regcache *regcache, int regnum)
- {
- struct reg regs;
- pid_t pid = regcache->ptid ().pid ();
- int lwp = regcache->ptid ().lwp ();
- if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
- perror_with_name (_("Couldn't get registers"));
- vaxbsd_collect_gregset (regcache, ®s, regnum);
- if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
- perror_with_name (_("Couldn't write registers"));
- }
- /* Support for debugging kernel virtual memory images. */
- #include <machine/pcb.h>
- #include "bsd-kvm.h"
- static int
- vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
- {
- int regnum;
- /* The following is true for OpenBSD 3.5:
- The pcb contains the register state at the context switch inside
- cpu_switch(). */
- /* The stack pointer shouldn't be zero. */
- if (pcb->KSP == 0)
- return 0;
- for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++)
- regcache->raw_supply (regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
- regcache->raw_supply (VAX_AP_REGNUM, &pcb->AP);
- regcache->raw_supply (VAX_FP_REGNUM, &pcb->FP);
- regcache->raw_supply (VAX_SP_REGNUM, &pcb->KSP);
- regcache->raw_supply (VAX_PC_REGNUM, &pcb->PC);
- regcache->raw_supply (VAX_PS_REGNUM, &pcb->PSL);
- return 1;
- }
- void _initialize_vaxbsd_nat ();
- void
- _initialize_vaxbsd_nat ()
- {
- add_inf_child_target (&the_vax_bsd_nat_target);
- /* Support debugging kernel virtual memory images. */
- bsd_kvm_add_target (vaxbsd_supply_pcb);
- }
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