148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/* Native-dependent code for modern VAX BSD's.
|
||
|
||
Copyright (C) 2004, 2005 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 2 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, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, USA. */
|
||
|
||
#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"
|
||
|
||
/* 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 = gregs;
|
||
int regnum;
|
||
|
||
for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
|
||
regcache_raw_supply (regcache, 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 = gregs;
|
||
int i;
|
||
|
||
for (i = 0; i <= VAX_NUM_REGS; i++)
|
||
{
|
||
if (regnum == -1 || regnum == i)
|
||
regcache_raw_collect (regcache, i, regs + i * 4);
|
||
}
|
||
}
|
||
|
||
|
||
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
|
||
for all registers. */
|
||
|
||
static void
|
||
vaxbsd_fetch_inferior_registers (int regnum)
|
||
{
|
||
struct reg regs;
|
||
|
||
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
vaxbsd_supply_gregset (current_regcache, ®s);
|
||
}
|
||
|
||
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
||
this for all registers. */
|
||
|
||
static void
|
||
vaxbsd_store_inferior_registers (int regnum)
|
||
{
|
||
struct reg regs;
|
||
|
||
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
vaxbsd_collect_gregset (current_regcache, ®s, regnum);
|
||
|
||
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't write registers"));
|
||
}
|
||
|
||
|
||
/* Support for debugging kernel virtual memory images. */
|
||
|
||
#include <sys/types.h>
|
||
#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 (regcache, regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
|
||
regcache_raw_supply (regcache, VAX_AP_REGNUM, &pcb->AP);
|
||
regcache_raw_supply (regcache, VAX_FP_REGNUM, &pcb->FP);
|
||
regcache_raw_supply (regcache, VAX_SP_REGNUM, &pcb->KSP);
|
||
regcache_raw_supply (regcache, VAX_PC_REGNUM, &pcb->PC);
|
||
regcache_raw_supply (regcache, VAX_PS_REGNUM, &pcb->PSL);
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_vaxbsd_nat (void);
|
||
|
||
void
|
||
_initialize_vaxbsd_nat (void)
|
||
{
|
||
struct target_ops *t;
|
||
|
||
t = inf_ptrace_target ();
|
||
t->to_fetch_registers = vaxbsd_fetch_inferior_registers;
|
||
t->to_store_registers = vaxbsd_store_inferior_registers;
|
||
add_target (t);
|
||
|
||
/* Support debugging kernel virtual memory images. */
|
||
bsd_kvm_add_target (vaxbsd_supply_pcb);
|
||
}
|