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/* Low level Alpha GNU/Linux interface, for GDB when running native.
Copyright (C) 2005-2023 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 "target.h"
#include "regcache.h"
#include "linux-nat-trad.h"
#include "alpha-tdep.h"
#include "gdbarch.h"
#include "nat/gdb_ptrace.h"
#include <alpha/ptrace.h>
#include <sys/procfs.h>
#include "gregset.h"
/* The address of UNIQUE for ptrace. */
#define ALPHA_UNIQUE_PTRACE_ADDR 65
class alpha_linux_nat_target final : public linux_nat_trad_target
{
protected:
/* Override linux_nat_trad_target methods. */
CORE_ADDR register_u_offset (struct gdbarch *gdbarch,
int regno, int store_p) override;
};
static alpha_linux_nat_target the_alpha_linux_nat_target;
/* See the comment in m68k-tdep.c regarding the utility of these
functions. */
void
supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
{
const long *regp = (const long *)gregsetp;
/* PC is in slot 32, UNIQUE is in slot 33. */
alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32);
}
void
fill_gregset (const struct regcache *regcache,
gdb_gregset_t *gregsetp, int regno)
{
long *regp = (long *)gregsetp;
/* PC is in slot 32, UNIQUE is in slot 33. */
alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32);
}
/* Now we do the same thing for floating-point registers.
Again, see the comments in m68k-tdep.c. */
void
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
{
const long *regp = (const long *)fpregsetp;
/* FPCR is in slot 32. */
alpha_supply_fp_regs (regcache, -1, regp, regp + 31);
}
void
fill_fpregset (const struct regcache *regcache,
gdb_fpregset_t *fpregsetp, int regno)
{
long *regp = (long *)fpregsetp;
/* FPCR is in slot 32. */
alpha_fill_fp_regs (regcache, regno, regp, regp + 31);
}
CORE_ADDR
alpha_linux_nat_target::register_u_offset (struct gdbarch *gdbarch,
int regno, int store_p)
{
if (regno == gdbarch_pc_regnum (gdbarch))
return PC;
if (regno == ALPHA_UNIQUE_REGNUM)
return ALPHA_UNIQUE_PTRACE_ADDR;
if (regno < gdbarch_fp0_regnum (gdbarch))
return GPR_BASE + regno;
else
return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch);
}
void _initialize_alpha_linux_nat ();
void
_initialize_alpha_linux_nat ()
{
linux_target = &the_alpha_linux_nat_target;
add_inf_child_target (&the_alpha_linux_nat_target);
}
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