123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168 |
- /* Native-dependent code for Alpha BSD's.
- Copyright (C) 2000-2022 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 "alpha-tdep.h"
- #include "alpha-bsd-tdep.h"
- #include "inf-ptrace.h"
- #include "netbsd-nat.h"
- #include <sys/types.h>
- #include <sys/ptrace.h>
- #include <machine/reg.h>
- struct alpha_bsd_nat_target final : public nbsd_nat_target
- {
- void fetch_registers (struct regcache *, int) override;
- void store_registers (struct regcache *, int) override;
- };
- static alpha_bsd_nat_target the_alpha_bsd_nat_target;
- /* Determine if PT_GETREGS fetches this register. */
- static int
- getregs_supplies (int regno)
- {
- return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
- || regno >= ALPHA_PC_REGNUM);
- }
- /* Fetch register REGNO from the inferior. If REGNO is -1, do this
- for all registers (including the floating point registers). */
- void
- alpha_bsd_nat_target::fetch_registers (struct regcache *regcache, int regno)
- {
- int lwp = regcache->ptid ().lwp ();
- if (regno == -1 || getregs_supplies (regno))
- {
- struct reg gregs;
- if (ptrace (PT_GETREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &gregs, lwp) == -1)
- perror_with_name (_("Couldn't get registers"));
- alphabsd_supply_reg (regcache, (char *) &gregs, regno);
- if (regno != -1)
- return;
- }
- if (regno == -1
- || regno >= gdbarch_fp0_regnum (regcache->arch ()))
- {
- struct fpreg fpregs;
- if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
- perror_with_name (_("Couldn't get floating point status"));
- alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno);
- }
- }
- /* Store register REGNO back into the inferior. If REGNO is -1, do
- this for all registers (including the floating point registers). */
- void
- alpha_bsd_nat_target::store_registers (struct regcache *regcache, int regno)
- {
- int lwp = regcache->ptid ().lwp ();
- if (regno == -1 || getregs_supplies (regno))
- {
- struct reg gregs;
- if (ptrace (PT_GETREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &gregs, lwp) == -1)
- perror_with_name (_("Couldn't get registers"));
- alphabsd_fill_reg (regcache, (char *) &gregs, regno);
- if (ptrace (PT_SETREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &gregs, lwp) == -1)
- perror_with_name (_("Couldn't write registers"));
- if (regno != -1)
- return;
- }
- if (regno == -1
- || regno >= gdbarch_fp0_regnum (regcache->arch ()))
- {
- struct fpreg fpregs;
- if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
- perror_with_name (_("Couldn't get floating point status"));
- alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno);
- if (ptrace (PT_SETFPREGS, regcache->ptid ().pid (),
- (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
- perror_with_name (_("Couldn't write floating point status"));
- }
- }
- /* Support for debugging kernel virtual memory images. */
- #include <sys/signal.h>
- #include <machine/pcb.h>
- #include "bsd-kvm.h"
- static int
- alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
- {
- int regnum;
- /* The following is true for OpenBSD 3.9:
- The pcb contains the register state at the context switch inside
- cpu_switch(). */
- /* The stack pointer shouldn't be zero. */
- if (pcb->pcb_hw.apcb_ksp == 0)
- return 0;
- regcache->raw_supply (ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp);
- for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++)
- regcache->raw_supply (regnum, &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]);
- regcache->raw_supply (ALPHA_RA_REGNUM, &pcb->pcb_context[7]);
- return 1;
- }
- void _initialize_alphabsd_nat ();
- void
- _initialize_alphabsd_nat ()
- {
- add_inf_child_target (&the_alpha_bsd_nat_target);
- /* Support debugging kernel virtual memory images. */
- bsd_kvm_add_target (alphabsd_supply_pcb);
- }
|