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/* Native-dependent code for FreeBSD/sparc64.
Copyright (C) 2003-2020 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/>. */
#include "defs.h"
#include "regcache.h"
#include "target.h"
#include "fbsd-nat.h"
#include "sparc64-tdep.h"
#include "sparc-nat.h"
/* Support for debugging kernel virtual memory images. */
#include <sys/types.h>
#include <machine/pcb.h>
#include "bsd-kvm.h"
static int
sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
/* The following is true for FreeBSD 5.4:
The pcb contains %sp and %pc. Since the register windows are
explicitly flushed, we can find the `local' and `in' registers on
the stack. */
/* The stack pointer shouldn't be zero. */
if (pcb->pcb_sp == 0)
return 0;
regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp);
regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc);
/* Synthesize %npc. */
pcb->pcb_pc += 4;
regcache->raw_supply (SPARC64_NPC_REGNUM, &pcb->pcb_pc);
/* Read `local' and `in' registers from the stack. */
sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
return 1;
}
/* Add some extra features to the generic SPARC target. */
static sparc_target<fbsd_nat_target> the_sparc64_fbsd_nat_target;
void
_initialize_sparc64fbsd_nat (void)
{
add_inf_child_target (&the_sparc64_fbsd_nat_target);
sparc_gregmap = &sparc64fbsd_gregmap;
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (sparc64fbsd_kvm_supply_pcb);
}
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