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/* Native-dependent code for FreeBSD/sparc64.
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Copyright (C) 2003-2022 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 "regcache.h"
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#include "target.h"
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#include "fbsd-nat.h"
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#include "sparc64-tdep.h"
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#include "sparc-nat.h"
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/* Support for debugging kernel virtual memory images. */
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#include <sys/types.h>
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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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sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb)
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{
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/* The following is true for FreeBSD 5.4:
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The pcb contains %sp and %pc. Since the register windows are
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explicitly flushed, we can find the `local' and `in' registers on
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the stack. */
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/* The stack pointer shouldn't be zero. */
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if (pcb->pcb_sp == 0)
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return 0;
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regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp);
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regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc);
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/* Synthesize %npc. */
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pcb->pcb_pc += 4;
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regcache->raw_supply (SPARC64_NPC_REGNUM, &pcb->pcb_pc);
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/* Read `local' and `in' registers from the stack. */
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sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
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return 1;
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}
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/* Add some extra features to the generic SPARC target. */
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static sparc_target<fbsd_nat_target> the_sparc64_fbsd_nat_target;
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void _initialize_sparc64fbsd_nat ();
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void
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_initialize_sparc64fbsd_nat ()
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{
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add_inf_child_target (&the_sparc64_fbsd_nat_target);
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sparc_gregmap = &sparc64fbsd_gregmap;
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/* Support debugging kernel virtual memory images. */
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bsd_kvm_add_target (sparc64fbsd_kvm_supply_pcb);
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}
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