[deliverable/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 "regcache.h"
#include "linux-nat.h"
#include "mips-linux-tdep.h"
#include "target-descriptions.h"
#include "xml-support.h"

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

#include <sgidefs.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) (struct regcache *, int);
void (*super_store_registers) (struct regcache *, int);

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

   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().  */

static CORE_ADDR
mips_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
{
  CORE_ADDR regaddr;

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

  if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
    regaddr = regno;
  else if ((regno >= mips_regnum (gdbarch)->fp0)
	   && (regno < mips_regnum (gdbarch)->fp0 + 32))
    regaddr = FPR_BASE + (regno - mips_regnum (gdbarch)->fp0);
  else if (regno == mips_regnum (gdbarch)->pc)
    regaddr = PC;
  else if (regno == mips_regnum (gdbarch)->cause)
    regaddr = store? (CORE_ADDR) -1 : CAUSE;
  else if (regno == mips_regnum (gdbarch)->badvaddr)
    regaddr = store? (CORE_ADDR) -1 : BADVADDR;
  else if (regno == mips_regnum (gdbarch)->lo)
    regaddr = MMLO;
  else if (regno == mips_regnum (gdbarch)->hi)
    regaddr = MMHI;
  else if (regno == mips_regnum (gdbarch)->fp_control_status)
    regaddr = FPC_CSR;
  else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
    regaddr = store? (CORE_ADDR) -1 : FPC_EIR;
  else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
    regaddr = 0;
  else
    regaddr = (CORE_ADDR) -1;

  return regaddr;
}

static CORE_ADDR
mips64_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
{
  CORE_ADDR regaddr;

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

  if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
    regaddr = regno;
  else if ((regno >= mips_regnum (gdbarch)->fp0)
	   && (regno < mips_regnum (gdbarch)->fp0 + 32))
    regaddr = MIPS64_FPR_BASE + (regno - gdbarch_fp0_regnum (current_gdbarch));
  else if (regno == mips_regnum (gdbarch)->pc)
    regaddr = MIPS64_PC;
  else if (regno == mips_regnum (gdbarch)->cause)
    regaddr = store? (CORE_ADDR) -1 : MIPS64_CAUSE;
  else if (regno == mips_regnum (gdbarch)->badvaddr)
    regaddr = store? (CORE_ADDR) -1 : MIPS64_BADVADDR;
  else if (regno == mips_regnum (gdbarch)->lo)
    regaddr = MIPS64_MMLO;
  else if (regno == mips_regnum (gdbarch)->hi)
    regaddr = MIPS64_MMHI;
  else if (regno == mips_regnum (gdbarch)->fp_control_status)
    regaddr = MIPS64_FPC_CSR;
  else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
    regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR;
  else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
    regaddr = 0;
  else
    regaddr = (CORE_ADDR) -1;

  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 (struct regcache *regcache, const gdb_gregset_t *gregsetp)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_supply_gregset (regcache, (const mips_elf_gregset_t *) gregsetp);
  else
    mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *) gregsetp);
}

void
fill_gregset (const struct regcache *regcache,
	      gdb_gregset_t *gregsetp, int regno)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_fill_gregset (regcache, (mips_elf_gregset_t *) gregsetp, regno);
  else
    mips64_fill_gregset (regcache, (mips64_elf_gregset_t *) gregsetp, regno);
}

void
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *) fpregsetp);
  else
    mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *) fpregsetp);
}

void
fill_fpregset (const struct regcache *regcache,
	       gdb_fpregset_t *fpregsetp, int regno)
{
  if (mips_isa_regsize (current_gdbarch) == 4)
    mips_fill_fpregset (regcache, (mips_elf_fpregset_t *) fpregsetp, regno);
  else
    mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *) 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 (struct regcache *regcache, 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 (regcache,
			     (const mips64_elf_gregset_t *) &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 (regcache,
			      (const mips64_elf_fpregset_t *) &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 (const struct regcache *regcache, 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 (regcache, &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 (regcache, &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 (struct regcache *regcache, int regnum)
{
  /* Unless we already know that PTRACE_GETREGS does not work, try it.  */
  if (have_ptrace_regsets)
    mips64_linux_regsets_fetch_registers (regcache, 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 (regcache, regnum);
}

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

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

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

static CORE_ADDR
mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)
{
  if (mips_abi_regsize (gdbarch) == 8)
    return mips64_linux_register_addr (gdbarch, regno, store_p);
  else
    return mips_linux_register_addr (gdbarch, regno, store_p);
}

static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
				      const char *, gdb_byte *, const gdb_byte *,
				      ULONGEST, LONGEST);

static LONGEST
mips_linux_xfer_partial (struct target_ops *ops,
			 enum target_object object,
			 const char *annex,
			 gdb_byte *readbuf, const gdb_byte *writebuf,
			 ULONGEST offset, LONGEST len)
{
  if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
    {
      if (annex != NULL && strcmp (annex, "target.xml") == 0)
	{
	  /* Report that target registers are a size we know for sure
	     that we can get from ptrace.  */
	  if (_MIPS_SIM == _ABIO32)
	    annex = "mips-linux.xml";
	  else
	    annex = "mips64-linux.xml";
	}

      return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
    }

  return super_xfer_partial (ops, object, annex, readbuf, writebuf,
			     offset, len);
}

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;

  /* Override the default to_xfer_partial.  */
  super_xfer_partial = t->to_xfer_partial;
  t->to_xfer_partial = mips_linux_xfer_partial;

  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	26	#include "target.h"
28f5035f	27	#include "regcache.h"
10d6c8cd	28	#include "linux-nat.h"
d37eb719	29	#include "mips-linux-tdep.h"
822b6570 DJ	30	#include "target-descriptions.h"
822b6570 DJ	31	#include "xml-support.h"
2aa830e4	32
dc60ece8	33	#include "gdb_proc_service.h"
3e00823e	34	#include "gregset.h"
dc60ece8	35
822b6570	36	#include <sgidefs.h>
d37eb719 DJ	37	#include <sys/ptrace.h>
d37eb719 DJ	38
dc60ece8 DJ	39	#ifndef PTRACE_GET_THREAD_AREA
	40	#define PTRACE_GET_THREAD_AREA 25
	41	#endif
	42
d37eb719 DJ	43	/* Assume that we have PTRACE_GETREGS et al. support. If we do not,
	44	we'll clear this and use PTRACE_PEEKUSER instead. */
	45	static int have_ptrace_regsets = 1;
	46
	47	/* Saved function pointers to fetch and store a single register using
	48	PTRACE_PEEKUSER and PTRACE_POKEUSER. */
	49
56be3814 UW	50	void (super_fetch_registers) (struct regcache , int);
56be3814 UW	51	void (super_store_registers) (struct regcache , int);
d37eb719	52
dda0c97e	53	/* Map gdb internal register number to ptrace ``address''.
7714d83a UW	54	These ``addresses'' are normally defined in <asm/ptrace.h>.
	55
	56	ptrace does not provide a way to read (or set) MIPS_PS_REGNUM,
	57	and there's no point in reading or setting MIPS_ZERO_REGNUM.
	58	We also can not set BADVADDR, CAUSE, or FCRIR via ptrace(). */
dda0c97e UW	59
dda0c97e UW	60	static CORE_ADDR
7714d83a	61	mips_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
dda0c97e	62	{
7714d83a	63	CORE_ADDR regaddr;
dda0c97e	64
f57d151a	65	if (regno < 0 \|\| regno >= gdbarch_num_regs (current_gdbarch))
dda0c97e UW	66	error (_("Bogon register number %d."), regno);
dda0c97e UW	67
7714d83a	68	if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
dda0c97e	69	regaddr = regno;
7714d83a UW	70	else if ((regno >= mips_regnum (gdbarch)->fp0)
	71	&& (regno < mips_regnum (gdbarch)->fp0 + 32))
	72	regaddr = FPR_BASE + (regno - mips_regnum (gdbarch)->fp0);
	73	else if (regno == mips_regnum (gdbarch)->pc)
dda0c97e	74	regaddr = PC;
7714d83a UW	75	else if (regno == mips_regnum (gdbarch)->cause)
	76	regaddr = store? (CORE_ADDR) -1 : CAUSE;
	77	else if (regno == mips_regnum (gdbarch)->badvaddr)
	78	regaddr = store? (CORE_ADDR) -1 : BADVADDR;
	79	else if (regno == mips_regnum (gdbarch)->lo)
dda0c97e	80	regaddr = MMLO;
7714d83a	81	else if (regno == mips_regnum (gdbarch)->hi)
dda0c97e	82	regaddr = MMHI;
7714d83a	83	else if (regno == mips_regnum (gdbarch)->fp_control_status)
dda0c97e	84	regaddr = FPC_CSR;
7714d83a UW	85	else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
7714d83a UW	86	regaddr = store? (CORE_ADDR) -1 : FPC_EIR;
822b6570 DJ	87	else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
822b6570 DJ	88	regaddr = 0;
dda0c97e	89	else
7714d83a	90	regaddr = (CORE_ADDR) -1;
dda0c97e UW	91
	92	return regaddr;
	93	}
	94
	95	static CORE_ADDR
7714d83a	96	mips64_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
dda0c97e	97	{
7714d83a	98	CORE_ADDR regaddr;
dda0c97e	99
f57d151a	100	if (regno < 0 \|\| regno >= gdbarch_num_regs (current_gdbarch))
dda0c97e UW	101	error (_("Bogon register number %d."), regno);
dda0c97e UW	102
7714d83a	103	if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
dda0c97e	104	regaddr = regno;
7714d83a UW	105	else if ((regno >= mips_regnum (gdbarch)->fp0)
7714d83a UW	106	&& (regno < mips_regnum (gdbarch)->fp0 + 32))
3e8c568d	107	regaddr = MIPS64_FPR_BASE + (regno - gdbarch_fp0_regnum (current_gdbarch));
7714d83a	108	else if (regno == mips_regnum (gdbarch)->pc)
dda0c97e	109	regaddr = MIPS64_PC;
7714d83a UW	110	else if (regno == mips_regnum (gdbarch)->cause)
	111	regaddr = store? (CORE_ADDR) -1 : MIPS64_CAUSE;
	112	else if (regno == mips_regnum (gdbarch)->badvaddr)
	113	regaddr = store? (CORE_ADDR) -1 : MIPS64_BADVADDR;
	114	else if (regno == mips_regnum (gdbarch)->lo)
dda0c97e	115	regaddr = MIPS64_MMLO;
7714d83a	116	else if (regno == mips_regnum (gdbarch)->hi)
dda0c97e	117	regaddr = MIPS64_MMHI;
7714d83a	118	else if (regno == mips_regnum (gdbarch)->fp_control_status)
dda0c97e	119	regaddr = MIPS64_FPC_CSR;
7714d83a UW	120	else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
7714d83a UW	121	regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR;
822b6570 DJ	122	else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
822b6570 DJ	123	regaddr = 0;
dda0c97e	124	else
7714d83a	125	regaddr = (CORE_ADDR) -1;
dda0c97e UW	126
	127	return regaddr;
	128	}
	129
dc60ece8 DJ	130	/* Fetch the thread-local storage pointer for libthread_db. */
	131
	132	ps_err_e
	133	ps_get_thread_area (const struct ps_prochandle *ph,
	134	lwpid_t lwpid, int idx, void **base)
	135	{
	136	if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
	137	return PS_ERR;
	138
	139	/* IDX is the bias from the thread pointer to the beginning of the
	140	thread descriptor. It has to be subtracted due to implementation
	141	quirks in libthread_db. */
	142	base = (void ) ((char )base - idx);
	143
	144	return PS_OK;
	145	}
	146
3e00823e UW	147	/* Wrapper functions. These are only used by libthread_db. */
	148
	149	void
7f7fe91e	150	supply_gregset (struct regcache regcache, const gdb_gregset_t gregsetp)
3e00823e UW	151	{
3e00823e UW	152	if (mips_isa_regsize (current_gdbarch) == 4)
7f7fe91e	153	mips_supply_gregset (regcache, (const mips_elf_gregset_t *) gregsetp);
3e00823e	154	else
7f7fe91e	155	mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *) gregsetp);
3e00823e UW	156	}
	157
	158	void
7f7fe91e UW	159	fill_gregset (const struct regcache *regcache,
7f7fe91e UW	160	gdb_gregset_t *gregsetp, int regno)
3e00823e UW	161	{
3e00823e UW	162	if (mips_isa_regsize (current_gdbarch) == 4)
7f7fe91e	163	mips_fill_gregset (regcache, (mips_elf_gregset_t *) gregsetp, regno);
3e00823e	164	else
7f7fe91e	165	mips64_fill_gregset (regcache, (mips64_elf_gregset_t *) gregsetp, regno);
3e00823e UW	166	}
	167
	168	void
7f7fe91e	169	supply_fpregset (struct regcache regcache, const gdb_fpregset_t fpregsetp)
3e00823e UW	170	{
3e00823e UW	171	if (mips_isa_regsize (current_gdbarch) == 4)
7f7fe91e	172	mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *) fpregsetp);
3e00823e	173	else
7f7fe91e	174	mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *) fpregsetp);
3e00823e UW	175	}
	176
	177	void
7f7fe91e UW	178	fill_fpregset (const struct regcache *regcache,
7f7fe91e UW	179	gdb_fpregset_t *fpregsetp, int regno)
3e00823e UW	180	{
3e00823e UW	181	if (mips_isa_regsize (current_gdbarch) == 4)
7f7fe91e	182	mips_fill_fpregset (regcache, (mips_elf_fpregset_t *) fpregsetp, regno);
3e00823e	183	else
7f7fe91e	184	mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *) fpregsetp, regno);
3e00823e UW	185	}
	186
	187
d37eb719 DJ	188	/* Fetch REGNO (or all registers if REGNO == -1) from the target
	189	using PTRACE_GETREGS et al. */
	190
	191	static void
56be3814	192	mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno)
d37eb719 DJ	193	{
	194	int is_fp;
	195	int tid;
	196
	197	if (regno >= mips_regnum (current_gdbarch)->fp0
	198	&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
	199	is_fp = 1;
	200	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
	201	is_fp = 1;
	202	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	203	is_fp = 1;
	204	else
	205	is_fp = 0;
	206
	207	tid = ptid_get_lwp (inferior_ptid);
	208	if (tid == 0)
	209	tid = ptid_get_pid (inferior_ptid);
	210
	211	if (regno == -1 \|\| !is_fp)
	212	{
	213	mips64_elf_gregset_t regs;
	214
	215	if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	216	{
	217	if (errno == EIO)
	218	{
	219	have_ptrace_regsets = 0;
	220	return;
	221	}
	222	perror_with_name (_("Couldn't get registers"));
	223	}
	224
56be3814	225	mips64_supply_gregset (regcache,
28f5035f	226	(const mips64_elf_gregset_t *) &regs);
d37eb719 DJ	227	}
	228
	229	if (regno == -1 \|\| is_fp)
	230	{
	231	mips64_elf_fpregset_t fp_regs;
	232
	233	if (ptrace (PTRACE_GETFPREGS, tid, 0L,
	234	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
	235	{
	236	if (errno == EIO)
	237	{
	238	have_ptrace_regsets = 0;
	239	return;
	240	}
	241	perror_with_name (_("Couldn't get FP registers"));
	242	}
	243
56be3814	244	mips64_supply_fpregset (regcache,
28f5035f	245	(const mips64_elf_fpregset_t *) &fp_regs);
d37eb719 DJ	246	}
	247	}
	248
	249	/* Store REGNO (or all registers if REGNO == -1) to the target
	250	using PTRACE_SETREGS et al. */
	251
	252	static void
56be3814	253	mips64_linux_regsets_store_registers (const struct regcache *regcache, int regno)
d37eb719 DJ	254	{
	255	int is_fp;
	256	int tid;
	257
	258	if (regno >= mips_regnum (current_gdbarch)->fp0
	259	&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
	260	is_fp = 1;
	261	else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
	262	is_fp = 1;
	263	else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
	264	is_fp = 1;
	265	else
	266	is_fp = 0;
	267
	268	tid = ptid_get_lwp (inferior_ptid);
	269	if (tid == 0)
	270	tid = ptid_get_pid (inferior_ptid);
	271
	272	if (regno == -1 \|\| !is_fp)
	273	{
	274	mips64_elf_gregset_t regs;
	275
	276	if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	277	perror_with_name (_("Couldn't get registers"));
	278
56be3814	279	mips64_fill_gregset (regcache, &regs, regno);
d37eb719 DJ	280
	281	if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -1)
	282	perror_with_name (_("Couldn't set registers"));
	283	}
	284
	285	if (regno == -1 \|\| is_fp)
	286	{
	287	mips64_elf_fpregset_t fp_regs;
	288
	289	if (ptrace (PTRACE_GETFPREGS, tid, 0L,
	290	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
	291	perror_with_name (_("Couldn't get FP registers"));
	292
56be3814	293	mips64_fill_fpregset (regcache, &fp_regs, regno);
d37eb719 DJ	294
	295	if (ptrace (PTRACE_SETFPREGS, tid, 0L,
	296	(PTRACE_TYPE_ARG3) &fp_regs) == -1)
	297	perror_with_name (_("Couldn't set FP registers"));
	298	}
	299	}
	300
	301	/* Fetch REGNO (or all registers if REGNO == -1) from the target
	302	using any working method. */
	303
	304	static void
56be3814	305	mips64_linux_fetch_registers (struct regcache *regcache, int regnum)
d37eb719 DJ	306	{
	307	/* Unless we already know that PTRACE_GETREGS does not work, try it. */
	308	if (have_ptrace_regsets)
56be3814	309	mips64_linux_regsets_fetch_registers (regcache, regnum);
d37eb719 DJ	310
	311	/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
	312	back to PTRACE_PEEKUSER. */
	313	if (!have_ptrace_regsets)
56be3814	314	super_fetch_registers (regcache, regnum);
d37eb719 DJ	315	}
	316
	317	/* Store REGNO (or all registers if REGNO == -1) to the target
	318	using any working method. */
	319
	320	static void
56be3814	321	mips64_linux_store_registers (struct regcache *regcache, int regnum)
d37eb719 DJ	322	{
	323	/* Unless we already know that PTRACE_GETREGS does not work, try it. */
	324	if (have_ptrace_regsets)
56be3814	325	mips64_linux_regsets_store_registers (regcache, regnum);
d37eb719 DJ	326
	327	/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
	328	back to PTRACE_PEEKUSER. */
	329	if (!have_ptrace_regsets)
56be3814	330	super_store_registers (regcache, regnum);
d37eb719 DJ	331	}
d37eb719 DJ	332
910122bf UW	333	/* Return the address in the core dump or inferior of register
	334	REGNO. */
	335
	336	static CORE_ADDR
7714d83a	337	mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)
910122bf	338	{
7714d83a UW	339	if (mips_abi_regsize (gdbarch) == 8)
7714d83a UW	340	return mips64_linux_register_addr (gdbarch, regno, store_p);
dda0c97e	341	else
7714d83a	342	return mips_linux_register_addr (gdbarch, regno, store_p);
910122bf UW	343	}
910122bf UW	344
822b6570 DJ	345	static LONGEST (super_xfer_partial) (struct target_ops , enum target_object,
	346	const char , gdb_byte , const gdb_byte *,
	347	ULONGEST, LONGEST);
	348
	349	static LONGEST
	350	mips_linux_xfer_partial (struct target_ops *ops,
	351	enum target_object object,
	352	const char *annex,
	353	gdb_byte readbuf, const gdb_byte writebuf,
	354	ULONGEST offset, LONGEST len)
	355	{
	356	if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
	357	{
	358	if (annex != NULL && strcmp (annex, "target.xml") == 0)
	359	{
	360	/* Report that target registers are a size we know for sure
	361	that we can get from ptrace. */
	362	if (_MIPS_SIM == _ABIO32)
	363	annex = "mips-linux.xml";
	364	else
	365	annex = "mips64-linux.xml";
	366	}
	367
	368	return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
	369	}
	370
	371	return super_xfer_partial (ops, object, annex, readbuf, writebuf,
	372	offset, len);
	373	}
	374
10d6c8cd DJ	375	void _initialize_mips_linux_nat (void);
	376
	377	void
	378	_initialize_mips_linux_nat (void)
	379	{
910122bf	380	struct target_ops *t = linux_trad_target (mips_linux_register_u_offset);
d37eb719 DJ	381
	382	super_fetch_registers = t->to_fetch_registers;
	383	super_store_registers = t->to_store_registers;
	384
	385	t->to_fetch_registers = mips64_linux_fetch_registers;
	386	t->to_store_registers = mips64_linux_store_registers;
	387
822b6570 DJ	388	/* Override the default to_xfer_partial. */
	389	super_xfer_partial = t->to_xfer_partial;
	390	t->to_xfer_partial = mips_linux_xfer_partial;
	391
f973ed9c	392	linux_nat_add_target (t);
10d6c8cd	393	}