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143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/* Native-dependent code for modern VAX BSD's.
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Copyright (C) 2004-2020 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 "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 "vax-tdep.h"
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#include "inf-ptrace.h"
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struct vax_bsd_nat_target final : public inf_ptrace_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 vax_bsd_nat_target the_vax_bsd_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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vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs)
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{
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const gdb_byte *regs = gregs;
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int regnum;
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for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
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regcache->raw_supply (regnum, regs + regnum * 4);
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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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vaxbsd_collect_gregset (const struct regcache *regcache,
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void *gregs, int regnum)
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{
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gdb_byte *regs = gregs;
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int i;
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for (i = 0; i <= VAX_NUM_REGS; i++)
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{
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if (regnum == -1 || regnum == i)
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regcache->raw_collect (i, regs + i * 4);
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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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vax_bsd_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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vaxbsd_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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void
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vax_bsd_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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vaxbsd_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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/* Support for debugging kernel virtual memory images. */
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#include <machine/pcb.h>
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#include "bsd-kvm.h"
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static int
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vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
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{
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int regnum;
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/* The following is true for OpenBSD 3.5:
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The pcb contains the register state at the context switch inside
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cpu_switch(). */
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/* The stack pointer shouldn't be zero. */
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if (pcb->KSP == 0)
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return 0;
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for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++)
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regcache->raw_supply (regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
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regcache->raw_supply (VAX_AP_REGNUM, &pcb->AP);
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regcache->raw_supply (VAX_FP_REGNUM, &pcb->FP);
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regcache->raw_supply (VAX_SP_REGNUM, &pcb->KSP);
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regcache->raw_supply (VAX_PC_REGNUM, &pcb->PC);
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regcache->raw_supply (VAX_PS_REGNUM, &pcb->PSL);
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return 1;
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}
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void
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_initialize_vaxbsd_nat (void)
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{
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add_inf_child_target (&the_vax_bsd_nat_target);
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/* Support debugging kernel virtual memory images. */
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bsd_kvm_add_target (vaxbsd_supply_pcb);
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}
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