[thirdparty/binutils-gdb.git] / gdb / alphanbsd-tdep.c

/* Target-dependent code for NetBSD/alpha.

   Copyright (C) 2002-2013 Free Software Foundation, Inc.

   Contributed by Wasabi Systems, 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 "frame.h"
#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "value.h"

#include "gdb_assert.h"
#include "gdb_string.h"

#include "alpha-tdep.h"
#include "alphabsd-tdep.h"
#include "nbsd-tdep.h"
#include "solib-svr4.h"
#include "target.h"

/* Core file support.  */

/* Even though NetBSD/alpha used ELF since day one, it used the
   traditional a.out-style core dump format before NetBSD 1.6.  */

/* Sizeof `struct reg' in <machine/reg.h>.  */
#define ALPHANBSD_SIZEOF_GREGS	(32 * 8)

/* Sizeof `struct fpreg' in <machine/reg.h.  */
#define ALPHANBSD_SIZEOF_FPREGS	((32 * 8) + 8)

/* Supply register REGNUM from the buffer specified by FPREGS and LEN
   in the floating-point register set REGSET to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void
alphanbsd_supply_fpregset (const struct regset *regset,
			   struct regcache *regcache,
			   int regnum, const void *fpregs, size_t len)
{
  const gdb_byte *regs = fpregs;
  int i;

  gdb_assert (len >= ALPHANBSD_SIZEOF_FPREGS);

  for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
    {
      if (regnum == i || regnum == -1)
	regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
    }

  if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
    regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 32 * 8);
}

/* Supply register REGNUM from the buffer specified by GREGS and LEN
   in the general-purpose register set REGSET to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void
alphanbsd_supply_gregset (const struct regset *regset,
			  struct regcache *regcache,
			  int regnum, const void *gregs, size_t len)
{
  const gdb_byte *regs = gregs;
  int i;

  gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);

  for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
    {
      if (regnum == i || regnum == -1)
	regcache_raw_supply (regcache, i, regs + i * 8);
    }

  if (regnum == ALPHA_PC_REGNUM || regnum == -1)
    regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
}

/* Supply register REGNUM from the buffer specified by GREGS and LEN
   in the general-purpose register set REGSET to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void
alphanbsd_aout_supply_gregset (const struct regset *regset,
			       struct regcache *regcache,
			       int regnum, const void *gregs, size_t len)
{
  const gdb_byte *regs = gregs;
  int i;

  /* Table to map a GDB register number to a trapframe register index.  */
  static const int regmap[] =
  {
     0,   1,   2,   3,
     4,   5,   6,   7,
     8,   9,  10,  11,
    12,  13,  14,  15, 
    30,  31,  32,  16, 
    17,  18,  19,  20,
    21,  22,  23,  24,
    25,  29,  26
  };

  gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);

  for (i = 0; i < ARRAY_SIZE(regmap); i++)
    {
      if (regnum == i || regnum == -1)
	regcache_raw_supply (regcache, i, regs + regmap[i] * 8);
    }

  if (regnum == ALPHA_PC_REGNUM || regnum == -1)
    regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);

  if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
    {
      regs += ALPHANBSD_SIZEOF_GREGS;
      len -= ALPHANBSD_SIZEOF_GREGS;
      alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
    }
}

/* NetBSD/alpha register sets.  */

static struct regset alphanbsd_gregset =
{
  NULL,
  alphanbsd_supply_gregset
};

static struct regset alphanbsd_fpregset =
{
  NULL,
  alphanbsd_supply_fpregset
};

static struct regset alphanbsd_aout_gregset =
{
  NULL,
  alphanbsd_aout_supply_gregset
};

/* Return the appropriate register set for the core section identified
   by SECT_NAME and SECT_SIZE.  */

const struct regset *
alphanbsd_regset_from_core_section (struct gdbarch *gdbarch,
				    const char *sect_name, size_t sect_size)
{
  if (strcmp (sect_name, ".reg") == 0 && sect_size >= ALPHANBSD_SIZEOF_GREGS)
    {
      if (sect_size >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
	return &alphanbsd_aout_gregset;
      else
	return &alphanbsd_gregset;
    }

  if (strcmp (sect_name, ".reg2") == 0 && sect_size >= ALPHANBSD_SIZEOF_FPREGS)
    return &alphanbsd_fpregset;

  return NULL;
}
\f

/* Signal trampolines.  */

/* Under NetBSD/alpha, signal handler invocations can be identified by the
   designated code sequence that is used to return from a signal handler.
   In particular, the return address of a signal handler points to the
   following code sequence:

	ldq	a0, 0(sp)
	lda	sp, 16(sp)
	lda	v0, 295(zero)	# __sigreturn14
	call_pal callsys

   Each instruction has a unique encoding, so we simply attempt to match
   the instruction the PC is pointing to with any of the above instructions.
   If there is a hit, we know the offset to the start of the designated
   sequence and can then check whether we really are executing in the
   signal trampoline.  If not, -1 is returned, otherwise the offset from the
   start of the return sequence is returned.  */
static const gdb_byte sigtramp_retcode[] =
{
  0x00, 0x00, 0x1e, 0xa6,	/* ldq a0, 0(sp) */
  0x10, 0x00, 0xde, 0x23,	/* lda sp, 16(sp) */
  0x27, 0x01, 0x1f, 0x20,	/* lda v0, 295(zero) */
  0x83, 0x00, 0x00, 0x00,	/* call_pal callsys */
};
#define RETCODE_NWORDS		4
#define RETCODE_SIZE		(RETCODE_NWORDS * 4)

static LONGEST
alphanbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
{
  gdb_byte ret[RETCODE_SIZE], w[4];
  LONGEST off;
  int i;

  if (target_read_memory (pc, w, 4) != 0)
    return -1;

  for (i = 0; i < RETCODE_NWORDS; i++)
    {
      if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
	break;
    }
  if (i == RETCODE_NWORDS)
    return (-1);

  off = i * 4;
  pc -= off;

  if (target_read_memory (pc, ret, sizeof (ret)) != 0)
    return -1;

  if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
    return off;

  return -1;
}

static int
alphanbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
		 	  CORE_ADDR pc, const char *func_name)
{
  return (nbsd_pc_in_sigtramp (pc, func_name)
	  || alphanbsd_sigtramp_offset (gdbarch, pc) >= 0);
}

static CORE_ADDR
alphanbsd_sigcontext_addr (struct frame_info *frame)
{
  /* FIXME: This is not correct for all versions of NetBSD/alpha.
     We will probably need to disassemble the trampoline to figure
     out which trampoline frame type we have.  */
  if (!get_next_frame (frame))
    return 0;
  return get_frame_base (get_next_frame (frame));
}
\f

static void
alphanbsd_init_abi (struct gdbarch_info info,
                    struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  /* Hook into the DWARF CFI frame unwinder.  */
  alpha_dwarf2_init_abi (info, gdbarch);

  /* Hook into the MDEBUG frame unwinder.  */
  alpha_mdebug_init_abi (info, gdbarch);

  /* NetBSD/alpha does not provide single step support via ptrace(2); we
     must use software single-stepping.  */
  set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);

  /* NetBSD/alpha has SVR4-style shared libraries.  */
  set_solib_svr4_fetch_link_map_offsets
    (gdbarch, svr4_lp64_fetch_link_map_offsets);

  tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
  tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
  tdep->sigcontext_addr = alphanbsd_sigcontext_addr;

  tdep->jb_pc = 2;
  tdep->jb_elt_size = 8;

  set_gdbarch_regset_from_core_section
    (gdbarch, alphanbsd_regset_from_core_section);
}
\f

static enum gdb_osabi
alphanbsd_core_osabi_sniffer (bfd *abfd)
{
  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
    return GDB_OSABI_NETBSD_ELF;

  return GDB_OSABI_UNKNOWN;
}
\f

/* Provide a prototype to silence -Wmissing-prototypes.  */
void _initialize_alphanbsd_tdep (void);

void
_initialize_alphanbsd_tdep (void)
{
  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
  gdbarch_register_osabi_sniffer (bfd_arch_alpha, bfd_target_unknown_flavour,
                                  alphanbsd_core_osabi_sniffer);

  gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
                          alphanbsd_init_abi);
}
Commit	Line	Data
789f3b5f MK	1	/* Target-dependent code for NetBSD/alpha.
789f3b5f MK	2
28e7fd62	3	Copyright (C) 2002-2013 Free Software Foundation, Inc.
2031c21a	4
da8ca43d JT	5	Contributed by Wasabi Systems, Inc.
	6
	7	This file is part of GDB.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
a9762ec7	11	the Free Software Foundation; either version 3 of the License, or
da8ca43d JT	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
a9762ec7	20	along with this program. If not, see <http://www.gnu.org/licenses/>. */
da8ca43d JT	21
da8ca43d JT	22	#include "defs.h"
2ca8ae21	23	#include "frame.h"
3beabdb2 MK	24	#include "gdbcore.h"
3beabdb2 MK	25	#include "osabi.h"
8513dd2d	26	#include "regcache.h"
3beabdb2	27	#include "regset.h"
da8ca43d	28	#include "value.h"
da8ca43d	29
3beabdb2	30	#include "gdb_assert.h"
cca0d3b0	31	#include "gdb_string.h"
9964235a	32
da8ca43d	33	#include "alpha-tdep.h"
8513dd2d	34	#include "alphabsd-tdep.h"
ea5bc2a6	35	#include "nbsd-tdep.h"
527ca6bb	36	#include "solib-svr4.h"
effa26a9	37	#include "target.h"
8513dd2d	38
3beabdb2 MK	39	/* Core file support. */
	40
	41	/* Even though NetBSD/alpha used ELF since day one, it used the
	42	traditional a.out-style core dump format before NetBSD 1.6. */
	43
	44	/* Sizeof `struct reg' in <machine/reg.h>. */
	45	#define ALPHANBSD_SIZEOF_GREGS (32 * 8)
	46
	47	/* Sizeof `struct fpreg' in <machine/reg.h. */
	48	#define ALPHANBSD_SIZEOF_FPREGS ((32 * 8) + 8)
	49
	50	/* Supply register REGNUM from the buffer specified by FPREGS and LEN
	51	in the floating-point register set REGSET to register cache
	52	REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
	53
8513dd2d	54	static void
3beabdb2 MK	55	alphanbsd_supply_fpregset (const struct regset *regset,
	56	struct regcache *regcache,
	57	int regnum, const void *fpregs, size_t len)
8513dd2d	58	{
3beabdb2 MK	59	const gdb_byte *regs = fpregs;
	60	int i;
	61
	62	gdb_assert (len >= ALPHANBSD_SIZEOF_FPREGS);
	63
	64	for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
	65	{
	66	if (regnum == i \|\| regnum == -1)
	67	regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
	68	}
	69
	70	if (regnum == ALPHA_FPCR_REGNUM \|\| regnum == -1)
	71	regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 32 * 8);
	72	}
	73
	74	/* Supply register REGNUM from the buffer specified by GREGS and LEN
	75	in the general-purpose register set REGSET to register cache
	76	REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
8513dd2d	77
3beabdb2 MK	78	static void
	79	alphanbsd_supply_gregset (const struct regset *regset,
	80	struct regcache *regcache,
	81	int regnum, const void *gregs, size_t len)
	82	{
	83	const gdb_byte *regs = gregs;
	84	int i;
	85
	86	gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
	87
	88	for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
	89	{
	90	if (regnum == i \|\| regnum == -1)
	91	regcache_raw_supply (regcache, i, regs + i * 8);
	92	}
	93
	94	if (regnum == ALPHA_PC_REGNUM \|\| regnum == -1)
	95	regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
	96	}
	97
	98	/* Supply register REGNUM from the buffer specified by GREGS and LEN
	99	in the general-purpose register set REGSET to register cache
	100	REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
	101
	102	static void
	103	alphanbsd_aout_supply_gregset (const struct regset *regset,
	104	struct regcache *regcache,
	105	int regnum, const void *gregs, size_t len)
	106	{
	107	const gdb_byte *regs = gregs;
	108	int i;
	109
	110	/* Table to map a GDB register number to a trapframe register index. */
8513dd2d JT	111	static const int regmap[] =
	112	{
	113	0, 1, 2, 3,
	114	4, 5, 6, 7,
	115	8, 9, 10, 11,
	116	12, 13, 14, 15,
	117	30, 31, 32, 16,
	118	17, 18, 19, 20,
	119	21, 22, 23, 24,
	120	25, 29, 26
	121	};
8513dd2d	122
3beabdb2	123	gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
8513dd2d	124
3beabdb2	125	for (i = 0; i < ARRAY_SIZE(regmap); i++)
8513dd2d	126	{
3beabdb2 MK	127	if (regnum == i \|\| regnum == -1)
3beabdb2 MK	128	regcache_raw_supply (regcache, i, regs + regmap[i] * 8);
8513dd2d JT	129	}
8513dd2d JT	130
3beabdb2 MK	131	if (regnum == ALPHA_PC_REGNUM \|\| regnum == -1)
3beabdb2 MK	132	regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
8513dd2d	133
3beabdb2	134	if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
8513dd2d	135	{
3beabdb2 MK	136	regs += ALPHANBSD_SIZEOF_GREGS;
	137	len -= ALPHANBSD_SIZEOF_GREGS;
	138	alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
8513dd2d JT	139	}
	140	}
	141
3beabdb2 MK	142	/* NetBSD/alpha register sets. */
	143
	144	static struct regset alphanbsd_gregset =
8513dd2d	145	{
3beabdb2 MK	146	NULL,
3beabdb2 MK	147	alphanbsd_supply_gregset
8513dd2d JT	148	};
8513dd2d JT	149
3beabdb2	150	static struct regset alphanbsd_fpregset =
8513dd2d	151	{
3beabdb2 MK	152	NULL,
3beabdb2 MK	153	alphanbsd_supply_fpregset
8513dd2d	154	};
da8ca43d	155
3beabdb2 MK	156	static struct regset alphanbsd_aout_gregset =
	157	{
	158	NULL,
	159	alphanbsd_aout_supply_gregset
	160	};
	161
	162	/* Return the appropriate register set for the core section identified
	163	by SECT_NAME and SECT_SIZE. */
	164
b0ca8573	165	const struct regset *
3beabdb2 MK	166	alphanbsd_regset_from_core_section (struct gdbarch *gdbarch,
	167	const char *sect_name, size_t sect_size)
	168	{
	169	if (strcmp (sect_name, ".reg") == 0 && sect_size >= ALPHANBSD_SIZEOF_GREGS)
b0ca8573 MK	170	{
	171	if (sect_size >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
	172	return &alphanbsd_aout_gregset;
	173	else
	174	return &alphanbsd_gregset;
	175	}
3beabdb2 MK	176
	177	if (strcmp (sect_name, ".reg2") == 0 && sect_size >= ALPHANBSD_SIZEOF_FPREGS)
	178	return &alphanbsd_fpregset;
	179
	180	return NULL;
	181	}
3beabdb2 MK	182	\f
	183
	184	/* Signal trampolines. */
	185
da8ca43d JT	186	/* Under NetBSD/alpha, signal handler invocations can be identified by the
	187	designated code sequence that is used to return from a signal handler.
	188	In particular, the return address of a signal handler points to the
	189	following code sequence:
	190
	191	ldq a0, 0(sp)
	192	lda sp, 16(sp)
	193	lda v0, 295(zero) # __sigreturn14
	194	call_pal callsys
	195
	196	Each instruction has a unique encoding, so we simply attempt to match
	197	the instruction the PC is pointing to with any of the above instructions.
	198	If there is a hit, we know the offset to the start of the designated
	199	sequence and can then check whether we really are executing in the
	200	signal trampoline. If not, -1 is returned, otherwise the offset from the
	201	start of the return sequence is returned. */
948f8e3d	202	static const gdb_byte sigtramp_retcode[] =
da8ca43d	203	{
cfef91e4 JT	204	0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
	205	0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
	206	0x27, 0x01, 0x1f, 0x20, /* lda v0, 295(zero) */
	207	0x83, 0x00, 0x00, 0x00, /* call_pal callsys */
da8ca43d	208	};
cfef91e4 JT	209	#define RETCODE_NWORDS 4
cfef91e4 JT	210	#define RETCODE_SIZE (RETCODE_NWORDS * 4)
da8ca43d	211
b0ca8573	212	static LONGEST
e17a4113	213	alphanbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
da8ca43d	214	{
948f8e3d	215	gdb_byte ret[RETCODE_SIZE], w[4];
da8ca43d JT	216	LONGEST off;
	217	int i;
	218
948f8e3d	219	if (target_read_memory (pc, w, 4) != 0)
da8ca43d JT	220	return -1;
	221
	222	for (i = 0; i < RETCODE_NWORDS; i++)
	223	{
cfef91e4	224	if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
da8ca43d JT	225	break;
	226	}
	227	if (i == RETCODE_NWORDS)
	228	return (-1);
	229
	230	off = i * 4;
	231	pc -= off;
	232
948f8e3d	233	if (target_read_memory (pc, ret, sizeof (ret)) != 0)
da8ca43d JT	234	return -1;
da8ca43d JT	235
cfef91e4	236	if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
da8ca43d JT	237	return off;
	238
	239	return -1;
	240	}
	241
6c72f9f9	242	static int
e17a4113	243	alphanbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
2c02bd72	244	CORE_ADDR pc, const char *func_name)
6c72f9f9	245	{
3d9b49b0	246	return (nbsd_pc_in_sigtramp (pc, func_name)
e17a4113	247	\|\| alphanbsd_sigtramp_offset (gdbarch, pc) >= 0);
6c72f9f9 JT	248	}
6c72f9f9 JT	249
2ca8ae21 JT	250	static CORE_ADDR
	251	alphanbsd_sigcontext_addr (struct frame_info *frame)
	252	{
	253	/* FIXME: This is not correct for all versions of NetBSD/alpha.
	254	We will probably need to disassemble the trampoline to figure
	255	out which trampoline frame type we have. */
94afd7a6 UW	256	if (!get_next_frame (frame))
	257	return 0;
	258	return get_frame_base (get_next_frame (frame));
2ca8ae21	259	}
b0ca8573	260	\f
2ca8ae21	261
da8ca43d JT	262	static void
	263	alphanbsd_init_abi (struct gdbarch_info info,
	264	struct gdbarch *gdbarch)
	265	{
	266	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
	267
baa490c4 RH	268	/* Hook into the DWARF CFI frame unwinder. */
	269	alpha_dwarf2_init_abi (info, gdbarch);
	270
	271	/* Hook into the MDEBUG frame unwinder. */
	272	alpha_mdebug_init_abi (info, gdbarch);
	273
da8ca43d JT	274	/* NetBSD/alpha does not provide single step support via ptrace(2); we
	275	must use software single-stepping. */
	276	set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
	277
789f3b5f MK	278	/* NetBSD/alpha has SVR4-style shared libraries. */
	279	set_solib_svr4_fetch_link_map_offsets
	280	(gdbarch, svr4_lp64_fetch_link_map_offsets);
da8ca43d JT	281
da8ca43d JT	282	tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
f2524b93	283	tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
2ca8ae21	284	tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
accc6d1f JT	285
	286	tdep->jb_pc = 2;
	287	tdep->jb_elt_size = 8;
3beabdb2 MK	288
	289	set_gdbarch_regset_from_core_section
	290	(gdbarch, alphanbsd_regset_from_core_section);
	291	}
3beabdb2 MK	292	\f
	293
	294	static enum gdb_osabi
	295	alphanbsd_core_osabi_sniffer (bfd *abfd)
	296	{
	297	if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
b0ca8573	298	return GDB_OSABI_NETBSD_ELF;
3beabdb2 MK	299
	300	return GDB_OSABI_UNKNOWN;
	301	}
	302	\f
	303
	304	/* Provide a prototype to silence -Wmissing-prototypes. */
	305	void _initialize_alphanbsd_tdep (void);
da8ca43d JT	306
	307	void
	308	_initialize_alphanbsd_tdep (void)
	309	{
3beabdb2 MK	310	/* BFD doesn't set a flavour for NetBSD style a.out core files. */
	311	gdbarch_register_osabi_sniffer (bfd_arch_alpha, bfd_target_unknown_flavour,
	312	alphanbsd_core_osabi_sniffer);
	313
05816f70	314	gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
70f80edf	315	alphanbsd_init_abi);
da8ca43d	316	}