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/* Native-dependent code for NetBSD/sparc64.
Copyright (C) 2003-2024 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 "gdbcore.h"
#include "regcache.h"
#include "target.h"
#include "sparc64-tdep.h"
#include "sparc-nat.h"
/* NetBSD is different from the other OSes that support both SPARC and
UltraSPARC in that the result of ptrace(2) depends on whether the
traced process is 32-bit or 64-bit. */
static void
sparc64nbsd_supply_gregset (const struct sparc_gregmap *gregmap,
struct regcache *regcache,
int regnum, const void *gregs)
{
int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
if (sparc32)
sparc32_supply_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
else
sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
}
static void
sparc64nbsd_collect_gregset (const struct sparc_gregmap *gregmap,
const struct regcache *regcache,
int regnum, void *gregs)
{
int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
if (sparc32)
sparc32_collect_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
else
sparc64_collect_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
}
static void
sparc64nbsd_supply_fpregset (const struct sparc_fpregmap *fpregmap,
struct regcache *regcache,
int regnum, const void *fpregs)
{
int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
if (sparc32)
sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
else
sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
}
static void
sparc64nbsd_collect_fpregset (const struct sparc_fpregmap *fpregmap,
const struct regcache *regcache,
int regnum, void *fpregs)
{
int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
if (sparc32)
sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
else
sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
}
/* Determine whether `gregset_t' contains register REGNUM. */
static int
sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
{
if (gdbarch_ptr_bit (gdbarch) == 32)
return sparc32_gregset_supplies_p (gdbarch, regnum);
/* Integer registers. */
if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
|| (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
|| (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
|| (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
return 1;
/* Control registers. */
if (regnum == SPARC64_PC_REGNUM
|| regnum == SPARC64_NPC_REGNUM
|| regnum == SPARC64_STATE_REGNUM
|| regnum == SPARC64_Y_REGNUM)
return 1;
return 0;
}
/* Determine whether `fpregset_t' contains register REGNUM. */
static int
sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
{
if (gdbarch_ptr_bit (gdbarch) == 32)
return sparc32_fpregset_supplies_p (gdbarch, regnum);
/* Floating-point registers. */
if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
|| (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
return 1;
/* Control registers. */
if (regnum == SPARC64_FSR_REGNUM)
return 1;
return 0;
}
/* Support for debugging kernel virtual memory images. */
#include <sys/types.h>
#include <machine/pcb.h>
#include "bsd-kvm.h"
static int
sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
u_int64_t state;
int regnum;
/* The following is true for NetBSD 1.6.2:
The pcb contains %sp and %pc, %pstate and %cwp. From this
information we reconstruct the register state as it would look
when we just returned from cpu_switch(). */
/* The stack pointer shouldn't be zero. */
if (pcb->pcb_sp == 0)
return 0;
/* If the program counter is zero, this is probably a core dump, and
we can get %pc from the stack. */
if (pcb->pcb_pc == 0)
read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
(gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp);
regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc);
state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
regcache->raw_supply (SPARC64_STATE_REGNUM, &state);
sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
return 1;
}
/* We've got nothing to add to the generic SPARC target. */
static sparc_target<inf_ptrace_target> the_sparc64_nbsd_nat_target;
void _initialize_sparc64nbsd_nat ();
void
_initialize_sparc64nbsd_nat ()
{
sparc_supply_gregset = sparc64nbsd_supply_gregset;
sparc_collect_gregset = sparc64nbsd_collect_gregset;
sparc_supply_fpregset = sparc64nbsd_supply_fpregset;
sparc_collect_fpregset = sparc64nbsd_collect_fpregset;
sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p;
sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p;
add_inf_child_target (&the_sparc64_nbsd_nat_target);
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (sparc64nbsd_supply_pcb);
}
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