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/* Low level Alpha GNU/Linux interface, for GDB when running native.
Copyright (C) 2005, 2006, 2007 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 "target.h"
#include "linux-nat.h"
#include "alpha-tdep.h"
#include <sys/ptrace.h>
#include <alpha/ptrace.h>
#include <sys/procfs.h>
#include "gregset.h"
/* Given a pointer to either a gregset_t or fpregset_t, return a
pointer to the first register. */
#define ALPHA_REGSET_BASE(regsetp) ((long *) (regsetp))
/* Given a pointer to a gregset_t, locate the UNIQUE value. */
#define ALPHA_REGSET_UNIQUE(regsetp) ((long *)(regsetp) + 32)
/* The address of UNIQUE for ptrace. */
#define ALPHA_UNIQUE_PTRACE_ADDR 65
/*
* See the comment in m68k-tdep.c regarding the utility of these functions.
*/
void
supply_gregset (gdb_gregset_t *gregsetp)
{
long *regp = ALPHA_REGSET_BASE (gregsetp);
void *unique = ALPHA_REGSET_UNIQUE (gregsetp);
/* PC is in slot 32. */
alpha_supply_int_regs (-1, regp, regp + 31, unique);
}
void
fill_gregset (gdb_gregset_t *gregsetp, int regno)
{
long *regp = ALPHA_REGSET_BASE (gregsetp);
void *unique = ALPHA_REGSET_UNIQUE (gregsetp);
/* PC is in slot 32. */
alpha_fill_int_regs (regno, regp, regp + 31, unique);
}
/*
* Now we do the same thing for floating-point registers.
* Again, see the comments in m68k-tdep.c.
*/
void
supply_fpregset (gdb_fpregset_t *fpregsetp)
{
long *regp = ALPHA_REGSET_BASE (fpregsetp);
/* FPCR is in slot 32. */
alpha_supply_fp_regs (-1, regp, regp + 31);
}
void
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
{
long *regp = ALPHA_REGSET_BASE (fpregsetp);
/* FPCR is in slot 32. */
alpha_fill_fp_regs (regno, regp, regp + 31);
}
static CORE_ADDR
alpha_linux_register_u_offset (int regno)
{
if (regno == PC_REGNUM)
return PC;
if (regno == ALPHA_UNIQUE_REGNUM)
return ALPHA_UNIQUE_PTRACE_ADDR;
if (regno < FP0_REGNUM)
return GPR_BASE + regno;
else
return FPR_BASE + regno - FP0_REGNUM;
}
void _initialialize_alpha_linux_nat (void);
void
_initialize_alpha_linux_nat (void)
{
linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset));
}
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