[thirdparty/binutils-gdb.git] / gdb / mips-linux-nat.c

/* Native-dependent code for GNU/Linux on MIPS processors.

   Copyright (C) 2001, 2002, 2003, 2004, 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 "inferior.h"
#include "mips-tdep.h"
#include "target.h"
#include "linux-nat.h"
#include "mips-linux-tdep.h"

#include "gdb_proc_service.h"
#include "gregset.h"

#include <sys/ptrace.h>

#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
#endif

/* Assume that we have PTRACE_GETREGS et al. support.  If we do not,
   we'll clear this and use PTRACE_PEEKUSER instead.  */
static int have_ptrace_regsets = 1;

/* Saved function pointers to fetch and store a single register using
   PTRACE_PEEKUSER and PTRACE_POKEUSER.  */

void (*super_fetch_registers) (int);
void (*super_store_registers) (int);

/* Pseudo registers can not be read.  ptrace does not provide a way to
   read (or set) MIPS_PS_REGNUM, and there's no point in reading or
   setting MIPS_ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or
   FCRIR via ptrace().  */

int
mips_linux_cannot_fetch_register (int regno)
{
  if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
    return 0;
  else if (regno >= mips_regnum (current_gdbarch)->fp0
	   && regno <= mips_regnum (current_gdbarch)->fp0 + 32)
    return 0;
  else if (regno == mips_regnum (current_gdbarch)->lo
	   || regno == mips_regnum (current_gdbarch)->hi
	   || regno == mips_regnum (current_gdbarch)->badvaddr
	   || regno == mips_regnum (current_gdbarch)->cause
	   || regno == mips_regnum (current_gdbarch)->pc
	   || regno == mips_regnum (current_gdbarch)->fp_control_status
	   || regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
    return 0;
  else
    return 1;
}

int
mips_linux_cannot_store_register (int regno)
{
  if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
    return 0;
  else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
    return 0;
  else if (regno == mips_regnum (current_gdbarch)->lo
	   || regno == mips_regnum (current_gdbarch)->hi
	   || regno == mips_regnum (current_gdbarch)->pc
	   || regno == mips_regnum (current_gdbarch)->fp_control_status)
    return 0;
  else
    return 1;
}

/* Map gdb internal register number to ptrace ``address''.
   These ``addresses'' are normally defined in <asm/ptrace.h>.  */

static CORE_ADDR
mips_linux_register_addr (int regno)
{
  int regaddr;

  if (regno < 0 || regno >= NUM_REGS)
    error (_("Bogon register number %d."), regno);

  if (regno < 32)
    regaddr = regno;
  else if ((regno >= mips_regnum (current_gdbarch)->fp0)
	   && (regno < mips_regnum (current_gdbarch)->fp0 + 32))
    regaddr = FPR_BASE + (regno - mips_regnum (current_gdbarch)->fp0);
  else if (regno == mips_regnum (current_gdbarch)->pc)
    regaddr = PC;
  else if (regno == mips_regnum (current_gdbarch)->cause)
    regaddr = CAUSE;
  else if (regno == mips_regnum (current_gdbarch)->badvaddr)
    regaddr = BADVADDR;
  else if (regno == mips_regnum (current_gdbarch)->lo)
    regaddr = MMLO;
  else if (regno == mips_regnum (current_gdbarch)->hi)
    regaddr = MMHI;
  else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
    regaddr = FPC_CSR;
  else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
    regaddr = FPC_EIR;
  else
    error (_("Unknowable register number %d."), regno);

  return regaddr;
}

static CORE_ADDR
mips64_linux_register_addr (int regno)
{
  int regaddr;

  if (regno < 0 || regno >= NUM_REGS)
    error (_("Bogon register number %d."), regno);

  if (regno < 32)
    regaddr = regno;
  else if ((regno >= mips_regnum (current_gdbarch)->fp0)
	   && (regno < mips_regnum (current_gdbarch)->fp0 + 32))
    regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM);
  else if (regno == mips_regnum (current_gdbarch)->pc)
    regaddr = MIPS64_PC;
  else if (regno == mips_regnum (current_gdbarch)->cause)
    regaddr = MIPS64_CAUSE;
  else if (regno == mips_regnum (current_gdbarch)->badvaddr)
    regaddr = MIPS64_BADVADDR;
  else if (regno == mips_regnum (current_gdbarch)->lo)
    regaddr = MIPS64_MMLO;
  else if (regno == mips_regnum (current_gdbarch)->hi)
    regaddr = MIPS64_MMHI;
  else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
    regaddr = MIPS64_FPC_CSR;
  else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
    regaddr = MIPS64_FPC_EIR;
  else
    error (_("Unknowable register number %d."), regno);

  return regaddr;
}

/* Fetch the thread-local storage pointer for libthread_db.  */

ps_err_e
ps_get_thread_area (const struct ps_prochandle *ph,
                    lwpid_t lwpid, int idx, void **base)
{
  if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
    return PS_ERR;

  /* IDX is the bias from the thread pointer to the beginning of the
     thread descriptor.  It has to be subtracted due to implementation
     quirks in libthread_db.  */
  *base = (void *) ((char *)*base - idx);

  return PS_OK;
}

/* Wrapper functions.  These are only used by libthread_db.  */

void
supply_gregset (gdb_gregset_t *gregsetp)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_supply_gregset ((void *) gregsetp);
  else
    mips64_supply_gregset ((void *) gregsetp);
}

void
fill_gregset (gdb_gregset_t *gregsetp, int regno)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_fill_gregset ((void *) gregsetp, regno);
  else
    mips64_fill_gregset ((void *) gregsetp, regno);
}

void
supply_fpregset (gdb_fpregset_t *fpregsetp)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_supply_fpregset ((void *) fpregsetp);
  else
    mips64_supply_fpregset ((void *) fpregsetp);
}

void
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_fill_fpregset ((void *) fpregsetp, regno);
  else
    mips64_fill_fpregset ((void *) fpregsetp, regno);
}


/* Fetch REGNO (or all registers if REGNO == -1) from the target
   using PTRACE_GETREGS et al.  */

static void
mips64_linux_regsets_fetch_registers (int regno)
{
  int is_fp;
  int tid;

  if (regno >= mips_regnum (current_gdbarch)->fp0
      && regno <= mips_regnum (current_gdbarch)->fp0 + 32)
    is_fp = 1;
  else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
    is_fp = 1;
  else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
    is_fp = 1;
  else
    is_fp = 0;

  tid = ptid_get_lwp (inferior_ptid);
  if (tid == 0)
    tid = ptid_get_pid (inferior_ptid);

  if (regno == -1 || !is_fp)
    {
      mips64_elf_gregset_t regs;

      if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	{
	  if (errno == EIO)
	    {
	      have_ptrace_regsets = 0;
	      return;
	    }
	  perror_with_name (_("Couldn't get registers"));
	}

      mips64_supply_gregset (&regs);
    }

  if (regno == -1 || is_fp)
    {
      mips64_elf_fpregset_t fp_regs;

      if (ptrace (PTRACE_GETFPREGS, tid, 0L,
		  (PTRACE_TYPE_ARG3) &fp_regs) == -1)
	{
	  if (errno == EIO)
	    {
	      have_ptrace_regsets = 0;
	      return;
	    }
	  perror_with_name (_("Couldn't get FP registers"));
	}

      mips64_supply_fpregset (&fp_regs);
    }
}

/* Store REGNO (or all registers if REGNO == -1) to the target
   using PTRACE_SETREGS et al.  */

static void
mips64_linux_regsets_store_registers (int regno)
{
  int is_fp;
  int tid;

  if (regno >= mips_regnum (current_gdbarch)->fp0
      && regno <= mips_regnum (current_gdbarch)->fp0 + 32)
    is_fp = 1;
  else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
    is_fp = 1;
  else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
    is_fp = 1;
  else
    is_fp = 0;

  tid = ptid_get_lwp (inferior_ptid);
  if (tid == 0)
    tid = ptid_get_pid (inferior_ptid);

  if (regno == -1 || !is_fp)
    {
      mips64_elf_gregset_t regs;

      if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	perror_with_name (_("Couldn't get registers"));

      mips64_fill_gregset (&regs, regno);

      if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	perror_with_name (_("Couldn't set registers"));
    }

  if (regno == -1 || is_fp)
    {
      mips64_elf_fpregset_t fp_regs;

      if (ptrace (PTRACE_GETFPREGS, tid, 0L,
		  (PTRACE_TYPE_ARG3) &fp_regs) == -1)
	perror_with_name (_("Couldn't get FP registers"));

      mips64_fill_fpregset (&fp_regs, regno);

      if (ptrace (PTRACE_SETFPREGS, tid, 0L,
		  (PTRACE_TYPE_ARG3) &fp_regs) == -1)
	perror_with_name (_("Couldn't set FP registers"));
    }
}

/* Fetch REGNO (or all registers if REGNO == -1) from the target
   using any working method.  */

static void
mips64_linux_fetch_registers (int regnum)
{
  /* Unless we already know that PTRACE_GETREGS does not work, try it.  */
  if (have_ptrace_regsets)
    mips64_linux_regsets_fetch_registers (regnum);

  /* If we know, or just found out, that PTRACE_GETREGS does not work, fall
     back to PTRACE_PEEKUSER.  */
  if (!have_ptrace_regsets)
    super_fetch_registers (regnum);
}

/* Store REGNO (or all registers if REGNO == -1) to the target
   using any working method.  */

static void
mips64_linux_store_registers (int regnum)
{
  /* Unless we already know that PTRACE_GETREGS does not work, try it.  */
  if (have_ptrace_regsets)
    mips64_linux_regsets_store_registers (regnum);

  /* If we know, or just found out, that PTRACE_GETREGS does not work, fall
     back to PTRACE_PEEKUSER.  */
  if (!have_ptrace_regsets)
    super_store_registers (regnum);
}

/* Return the address in the core dump or inferior of register
   REGNO.  */

static CORE_ADDR
mips_linux_register_u_offset (int regno)
{
  if (mips_abi_regsize (current_gdbarch) == 8)
    return mips64_linux_register_addr (regno);
  else
    return mips_linux_register_addr (regno);
}

void _initialize_mips_linux_nat (void);

void
_initialize_mips_linux_nat (void)
{
  struct target_ops *t = linux_trad_target (mips_linux_register_u_offset);

  super_fetch_registers = t->to_fetch_registers;
  super_store_registers = t->to_store_registers;

  t->to_fetch_registers = mips64_linux_fetch_registers;
  t->to_store_registers = mips64_linux_store_registers;

  linux_nat_add_target (t);
}
Commit	Line	Data
75c9abc6	1	/* Native-dependent code for GNU/Linux on MIPS processors.
a094c6fb	2
6aba47ca	3	Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
dc60ece8	4	Free Software Foundation, Inc.
2aa830e4 DJ	5
	6	This file is part of GDB.
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
197e01b6 EZ	20	Foundation, Inc., 51 Franklin Street, Fifth Floor,
197e01b6 EZ	21	Boston, MA 02110-1301, USA. */
2aa830e4 DJ	22
2aa830e4 DJ	23	#include "defs.h"
d37eb719	24	#include "inferior.h"
6b753f60	25	#include "mips-tdep.h"
10d6c8cd DJ	26	#include "target.h"
10d6c8cd DJ	27	#include "linux-nat.h"
d37eb719	28	#include "mips-linux-tdep.h"
2aa830e4	29
dc60ece8	30	#include "gdb_proc_service.h"
3e00823e	31	#include "gregset.h"
dc60ece8	32
d37eb719 DJ	33	#include <sys/ptrace.h>
d37eb719 DJ	34
dc60ece8 DJ	35	#ifndef PTRACE_GET_THREAD_AREA
	36	#define PTRACE_GET_THREAD_AREA 25
	37	#endif
	38
d37eb719 DJ	39	/* Assume that we have PTRACE_GETREGS et al. support. If we do not,
	40	we'll clear this and use PTRACE_PEEKUSER instead. */
	41	static int have_ptrace_regsets = 1;
	42
	43	/* Saved function pointers to fetch and store a single register using
	44	PTRACE_PEEKUSER and PTRACE_POKEUSER. */
	45
	46	void (*super_fetch_registers) (int);
	47	void (*super_store_registers) (int);
	48
2aa830e4	49	/* Pseudo registers can not be read. ptrace does not provide a way to
24e05951 AC	50	read (or set) MIPS_PS_REGNUM, and there's no point in reading or
	51	setting MIPS_ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or
	52	FCRIR via ptrace(). */
2aa830e4 DJ	53
	54	int
	55	mips_linux_cannot_fetch_register (int regno)
	56	{
613e114f	57	if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
2aa830e4	58	return 0;
56cea623 AC	59	else if (regno >= mips_regnum (current_gdbarch)->fp0
56cea623 AC	60	&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
fd8f87c5	61	return 0;
56cea623 AC	62	else if (regno == mips_regnum (current_gdbarch)->lo
	63	\|\| regno == mips_regnum (current_gdbarch)->hi
	64	\|\| regno == mips_regnum (current_gdbarch)->badvaddr
	65	\|\| regno == mips_regnum (current_gdbarch)->cause
	66	\|\| regno == mips_regnum (current_gdbarch)->pc
	67	\|\| regno == mips_regnum (current_gdbarch)->fp_control_status
	68	\|\| regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	69	return 0;
	70	else
	71	return 1;
2aa830e4 DJ	72	}
	73
	74	int
	75	mips_linux_cannot_store_register (int regno)
	76	{
613e114f	77	if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
2aa830e4	78	return 0;
fd8f87c5 DJ	79	else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
fd8f87c5 DJ	80	return 0;
56cea623 AC	81	else if (regno == mips_regnum (current_gdbarch)->lo
	82	\|\| regno == mips_regnum (current_gdbarch)->hi
	83	\|\| regno == mips_regnum (current_gdbarch)->pc
	84	\|\| regno == mips_regnum (current_gdbarch)->fp_control_status)
	85	return 0;
	86	else
	87	return 1;
2aa830e4	88	}
10d6c8cd	89
dda0c97e UW	90	/* Map gdb internal register number to ptrace ``address''.
	91	These ``addresses'' are normally defined in <asm/ptrace.h>. */
	92
	93	static CORE_ADDR
	94	mips_linux_register_addr (int regno)
	95	{
	96	int regaddr;
	97
	98	if (regno < 0 \|\| regno >= NUM_REGS)
	99	error (_("Bogon register number %d."), regno);
	100
	101	if (regno < 32)
	102	regaddr = regno;
	103	else if ((regno >= mips_regnum (current_gdbarch)->fp0)
	104	&& (regno < mips_regnum (current_gdbarch)->fp0 + 32))
	105	regaddr = FPR_BASE + (regno - mips_regnum (current_gdbarch)->fp0);
	106	else if (regno == mips_regnum (current_gdbarch)->pc)
	107	regaddr = PC;
	108	else if (regno == mips_regnum (current_gdbarch)->cause)
	109	regaddr = CAUSE;
	110	else if (regno == mips_regnum (current_gdbarch)->badvaddr)
	111	regaddr = BADVADDR;
	112	else if (regno == mips_regnum (current_gdbarch)->lo)
	113	regaddr = MMLO;
	114	else if (regno == mips_regnum (current_gdbarch)->hi)
	115	regaddr = MMHI;
	116	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
	117	regaddr = FPC_CSR;
	118	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	119	regaddr = FPC_EIR;
	120	else
	121	error (_("Unknowable register number %d."), regno);
	122
	123	return regaddr;
	124	}
	125
	126	static CORE_ADDR
	127	mips64_linux_register_addr (int regno)
	128	{
	129	int regaddr;
	130
	131	if (regno < 0 \|\| regno >= NUM_REGS)
	132	error (_("Bogon register number %d."), regno);
	133
	134	if (regno < 32)
	135	regaddr = regno;
	136	else if ((regno >= mips_regnum (current_gdbarch)->fp0)
	137	&& (regno < mips_regnum (current_gdbarch)->fp0 + 32))
	138	regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM);
	139	else if (regno == mips_regnum (current_gdbarch)->pc)
	140	regaddr = MIPS64_PC;
	141	else if (regno == mips_regnum (current_gdbarch)->cause)
	142	regaddr = MIPS64_CAUSE;
	143	else if (regno == mips_regnum (current_gdbarch)->badvaddr)
	144	regaddr = MIPS64_BADVADDR;
	145	else if (regno == mips_regnum (current_gdbarch)->lo)
	146	regaddr = MIPS64_MMLO;
	147	else if (regno == mips_regnum (current_gdbarch)->hi)
	148	regaddr = MIPS64_MMHI;
	149	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
	150	regaddr = MIPS64_FPC_CSR;
	151	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	152	regaddr = MIPS64_FPC_EIR;
	153	else
154	error (_("Unknowable register number %d."), regno);
155
156	return regaddr;
157	}
158
dc60ece8 DJ	159	/* Fetch the thread-local storage pointer for libthread_db. */
	160
	161	ps_err_e
	162	ps_get_thread_area (const struct ps_prochandle *ph,
	163	lwpid_t lwpid, int idx, void **base)
	164	{
	165	if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
	166	return PS_ERR;
	167
	168	/* IDX is the bias from the thread pointer to the beginning of the
	169	thread descriptor. It has to be subtracted due to implementation
	170	quirks in libthread_db. */
	171	base = (void ) ((char )base - idx);
	172
	173	return PS_OK;
	174	}
	175
3e00823e UW	176	/* Wrapper functions. These are only used by libthread_db. */
	177
	178	void
	179	supply_gregset (gdb_gregset_t *gregsetp)
	180	{
	181	if (mips_isa_regsize (current_gdbarch) == 4)
	182	mips_supply_gregset ((void *) gregsetp);
	183	else
	184	mips64_supply_gregset ((void *) gregsetp);
	185	}
	186
	187	void
	188	fill_gregset (gdb_gregset_t *gregsetp, int regno)
	189	{
	190	if (mips_isa_regsize (current_gdbarch) == 4)
	191	mips_fill_gregset ((void *) gregsetp, regno);
	192	else
	193	mips64_fill_gregset ((void *) gregsetp, regno);
	194	}
	195
	196	void
	197	supply_fpregset (gdb_fpregset_t *fpregsetp)
	198	{
	199	if (mips_isa_regsize (current_gdbarch) == 4)
	200	mips_supply_fpregset ((void *) fpregsetp);
	201	else
	202	mips64_supply_fpregset ((void *) fpregsetp);
	203	}
	204
	205	void
	206	fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
	207	{
	208	if (mips_isa_regsize (current_gdbarch) == 4)
	209	mips_fill_fpregset ((void *) fpregsetp, regno);
	210	else
	211	mips64_fill_fpregset ((void *) fpregsetp, regno);
	212	}
	213
	214
d37eb719 DJ	215	/* Fetch REGNO (or all registers if REGNO == -1) from the target
	216	using PTRACE_GETREGS et al. */
	217
	218	static void
	219	mips64_linux_regsets_fetch_registers (int regno)
	220	{
	221	int is_fp;
	222	int tid;
	223
	224	if (regno >= mips_regnum (current_gdbarch)->fp0
	225	&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
	226	is_fp = 1;
	227	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
	228	is_fp = 1;
	229	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	230	is_fp = 1;
	231	else
	232	is_fp = 0;
	233
	234	tid = ptid_get_lwp (inferior_ptid);
	235	if (tid == 0)
	236	tid = ptid_get_pid (inferior_ptid);
	237
	238	if (regno == -1 \|\| !is_fp)
	239	{
	240	mips64_elf_gregset_t regs;
	241
	242	if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	243	{
	244	if (errno == EIO)
	245	{
	246	have_ptrace_regsets = 0;
	247	return;
	248	}
	249	perror_with_name (_("Couldn't get registers"));
	250	}
	251
	252	mips64_supply_gregset (&regs);
	253	}
	254
	255	if (regno == -1 \|\| is_fp)
	256	{
	257	mips64_elf_fpregset_t fp_regs;
	258
	259	if (ptrace (PTRACE_GETFPREGS, tid, 0L,
	260	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
	261	{
	262	if (errno == EIO)
	263	{
	264	have_ptrace_regsets = 0;
	265	return;
	266	}
	267	perror_with_name (_("Couldn't get FP registers"));
	268	}
	269
	270	mips64_supply_fpregset (&fp_regs);
	271	}
	272	}
	273
	274	/* Store REGNO (or all registers if REGNO == -1) to the target
	275	using PTRACE_SETREGS et al. */
	276
	277	static void
	278	mips64_linux_regsets_store_registers (int regno)
279	{
280	int is_fp;
281	int tid;
282
283	if (regno >= mips_regnum (current_gdbarch)->fp0
284	&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
285	is_fp = 1;
286	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
287	is_fp = 1;
288	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
289	is_fp = 1;
290	else
291	is_fp = 0;
292
293	tid = ptid_get_lwp (inferior_ptid);
294	if (tid == 0)
295	tid = ptid_get_pid (inferior_ptid);
296
297	if (regno == -1 \|\| !is_fp)
298	{
299	mips64_elf_gregset_t regs;
300
301	if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
302	perror_with_name (_("Couldn't get registers"));
303
304	mips64_fill_gregset (&regs, regno);
305
306	if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
307	perror_with_name (_("Couldn't set registers"));
308	}
309
310	if (regno == -1 \|\| is_fp)
311	{
312	mips64_elf_fpregset_t fp_regs;
313
314	if (ptrace (PTRACE_GETFPREGS, tid, 0L,
315	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
316	perror_with_name (_("Couldn't get FP registers"));
317
318	mips64_fill_fpregset (&fp_regs, regno);
319
320	if (ptrace (PTRACE_SETFPREGS, tid, 0L,
321	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
322	perror_with_name (_("Couldn't set FP registers"));
323	}
324	}
325
326	/* Fetch REGNO (or all registers if REGNO == -1) from the target
327	using any working method. */
328
329	static void
330	mips64_linux_fetch_registers (int regnum)
331	{
332	/* Unless we already know that PTRACE_GETREGS does not work, try it. */
333	if (have_ptrace_regsets)
334	mips64_linux_regsets_fetch_registers (regnum);
335
336	/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
337	back to PTRACE_PEEKUSER. */
338	if (!have_ptrace_regsets)
339	super_fetch_registers (regnum);
340	}
341
342	/* Store REGNO (or all registers if REGNO == -1) to the target
343	using any working method. */
344
345	static void
346	mips64_linux_store_registers (int regnum)
347	{
348	/* Unless we already know that PTRACE_GETREGS does not work, try it. */
349	if (have_ptrace_regsets)
350	mips64_linux_regsets_store_registers (regnum);
351
352	/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
353	back to PTRACE_PEEKUSER. */
354	if (!have_ptrace_regsets)
355	super_store_registers (regnum);
356	}
357
910122bf UW	358	/* Return the address in the core dump or inferior of register
	359	REGNO. */
	360
	361	static CORE_ADDR
	362	mips_linux_register_u_offset (int regno)
	363	{
dda0c97e UW	364	if (mips_abi_regsize (current_gdbarch) == 8)
	365	return mips64_linux_register_addr (regno);
	366	else
	367	return mips_linux_register_addr (regno);
910122bf UW	368	}
910122bf UW	369
10d6c8cd DJ	370	void _initialize_mips_linux_nat (void);
	371
	372	void
	373	_initialize_mips_linux_nat (void)
	374	{
910122bf	375	struct target_ops *t = linux_trad_target (mips_linux_register_u_offset);
d37eb719 DJ	376
	377	super_fetch_registers = t->to_fetch_registers;
	378	super_store_registers = t->to_store_registers;
	379
	380	t->to_fetch_registers = mips64_linux_fetch_registers;
	381	t->to_store_registers = mips64_linux_store_registers;
	382
f973ed9c	383	linux_nat_add_target (t);
10d6c8cd	384	}