[deliverable/binutils-gdb.git] / gdb / m68klinux-tdep.c

/* Motorola m68k target-dependent support for GNU/Linux.

   Copyright 1996, 1998, 2000, 2001, 2002, 2003 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "gdbcore.h"
#include "doublest.h"
#include "floatformat.h"
#include "frame.h"
#include "target.h"
#include "gdb_string.h"
#include "gdbtypes.h"
#include "osabi.h"
#include "regcache.h"
#include "objfiles.h"
#include "symtab.h"
#include "m68k-tdep.h"
\f
/* Offsets (in target ints) into jmp_buf.  */

#define M68K_LINUX_JB_ELEMENT_SIZE 4
#define M68K_LINUX_JB_PC 7

/* Check whether insn1 and insn2 are parts of a signal trampoline.  */

#define IS_SIGTRAMP(insn1, insn2)					\
  (/* addaw #20,sp; moveq #119,d0; trap #0 */				\
   (insn1 == 0xdefc0014 && insn2 == 0x70774e40)				\
   /* moveq #119,d0; trap #0 */						\
   || insn1 == 0x70774e40)

#define IS_RT_SIGTRAMP(insn1, insn2)					\
  (/* movel #173,d0; trap #0 */						\
   (insn1 == 0x203c0000 && insn2 == 0x00ad4e40)				\
   /* moveq #82,d0; notb d0; trap #0 */					\
   || (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))

/* Return non-zero if PC points into the signal trampoline.  For the
   sake of m68k_linux_get_sigtramp_info we also distinguish between
   non-RT and RT signal trampolines.  */

static int
m68k_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
  CORE_ADDR sp;
  char buf[12];
  unsigned long insn0, insn1, insn2;

  if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
    return 0;
  insn1 = extract_unsigned_integer (buf + 4, 4);
  insn2 = extract_unsigned_integer (buf + 8, 4);
  if (IS_SIGTRAMP (insn1, insn2))
    return 1;
  if (IS_RT_SIGTRAMP (insn1, insn2))
    return 2;

  insn0 = extract_unsigned_integer (buf, 4);
  if (IS_SIGTRAMP (insn0, insn1))
    return 1;
  if (IS_RT_SIGTRAMP (insn0, insn1))
    return 2;

  insn0 = ((insn0 << 16) & 0xffffffff) | (insn1 >> 16);
  insn1 = ((insn1 << 16) & 0xffffffff) | (insn2 >> 16);
  if (IS_SIGTRAMP (insn0, insn1))
    return 1;
  if (IS_RT_SIGTRAMP (insn0, insn1))
    return 2;

  return 0;
}

/* From <asm/sigcontext.h>.  */
static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
{
  2 * 4,			/* %d0 */
  3 * 4,			/* %d1 */
  -1,				/* %d2 */
  -1,				/* %d3 */
  -1,				/* %d4 */
  -1,				/* %d5 */
  -1,				/* %d6 */
  -1,				/* %d7 */
  4 * 4,			/* %a0 */
  5 * 4,			/* %a1 */
  -1,				/* %a2 */
  -1,				/* %a3 */
  -1,				/* %a4 */
  -1,				/* %a5 */
  -1,				/* %fp */
  1 * 4,			/* %sp */
  5 * 4 + 2,			/* %sr */
  6 * 4 + 2,			/* %pc */
  8 * 4,			/* %fp0 */
  11 * 4,			/* %fp1 */
  -1,				/* %fp2 */
  -1,				/* %fp3 */
  -1,				/* %fp4 */
  -1,				/* %fp5 */
  -1,				/* %fp6 */
  -1,				/* %fp7 */
  14 * 4,			/* %fpcr */
  15 * 4,			/* %fpsr */
  16 * 4			/* %fpiaddr */
};

/* From <asm/ucontext.h>.  */
static int m68k_linux_ucontext_reg_offset[M68K_NUM_REGS] =
{
  6 * 4,			/* %d0 */
  7 * 4,			/* %d1 */
  8 * 4,			/* %d2 */
  9 * 4,			/* %d3 */
  10 * 4,			/* %d4 */
  11 * 4,			/* %d5 */
  12 * 4,			/* %d6 */
  13 * 4,			/* %d7 */
  14 * 4,			/* %a0 */
  15 * 4,			/* %a1 */
  16 * 4,			/* %a2 */
  17 * 4,			/* %a3 */
  18 * 4,			/* %a4 */
  19 * 4,			/* %a5 */
  20 * 4,			/* %fp */
  21 * 4,			/* %sp */
  23 * 4,			/* %sr */
  22 * 4,			/* %pc */
  27 * 4,			/* %fp0 */
  30 * 4,			/* %fp1 */
  33 * 4,			/* %fp2 */
  36 * 4,			/* %fp3 */
  39 * 4,			/* %fp4 */
  42 * 4,			/* %fp5 */
  45 * 4,			/* %fp6 */
  48 * 4,			/* %fp7 */
  24 * 4,			/* %fpcr */
  25 * 4,			/* %fpsr */
  26 * 4			/* %fpiaddr */
};


/* Get info about saved registers in sigtramp.  */

static struct m68k_sigtramp_info
m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
{
  CORE_ADDR sp;
  char buf[4];
  struct m68k_sigtramp_info info;

  frame_unwind_register (next_frame, M68K_SP_REGNUM, buf);
  sp = extract_unsigned_integer (buf, 4);

  /* Get sigcontext address, it is the third parameter on the stack.  */
  info.sigcontext_addr = read_memory_unsigned_integer (sp + 8, 4);

  if (m68k_linux_pc_in_sigtramp (frame_pc_unwind (next_frame), 0) == 2)
    info.sc_reg_offset = m68k_linux_ucontext_reg_offset;
  else
    info.sc_reg_offset = m68k_linux_sigcontext_reg_offset;
  return info;
}

/* Extract from an array REGBUF containing the (raw) register state, a
   function return value of TYPE, and copy that, in virtual format,
   into VALBUF.  */

static void
m68k_linux_extract_return_value (struct type *type, struct regcache *regcache,
				 void *valbuf)
{
  int len = TYPE_LENGTH (type);
  char buf[M68K_MAX_REGISTER_SIZE];

  if (TYPE_CODE (type) == TYPE_CODE_STRUCT
      && TYPE_NFIELDS (type) == 1)
    {
      m68k_linux_extract_return_value (TYPE_FIELD_TYPE (type, 0), regcache,
				       valbuf);
      return;
    }

  if (TYPE_CODE (type) == TYPE_CODE_FLT)
    {
      regcache_raw_read (regcache, M68K_FP0_REGNUM, buf);
      convert_typed_floating (buf, builtin_type_m68881_ext, valbuf, type);
    }
  else if (TYPE_CODE (type) == TYPE_CODE_PTR)
    regcache_raw_read (regcache, M68K_A0_REGNUM, valbuf);
  else
    {
      if (len <= 4)
	{
	  regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
	  memcpy (valbuf, buf + (4 - len), len);
	}
      else if (len <= 8)
	{
	  regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
	  memcpy (valbuf, buf + (8 - len), len - 4);
	  regcache_raw_read (regcache, M68K_D1_REGNUM,
			     (char *) valbuf + (len - 4));
	}
      else
	internal_error (__FILE__, __LINE__,
			"Cannot extract return value of %d bytes long.", len);
    }
}

/* Write into the appropriate registers a function return value stored
   in VALBUF of type TYPE, given in virtual format.  */

static void
m68k_linux_store_return_value (struct type *type, struct regcache *regcache,
			       const void *valbuf)
{
  int len = TYPE_LENGTH (type);

  if (TYPE_CODE (type) == TYPE_CODE_STRUCT
      && TYPE_NFIELDS (type) == 1)
    {
      m68k_linux_store_return_value (TYPE_FIELD_TYPE (type, 0), regcache,
				     valbuf);
      return;
    }

  if (TYPE_CODE (type) == TYPE_CODE_FLT)
    {
      char buf[M68K_MAX_REGISTER_SIZE];
      convert_typed_floating (valbuf, type, buf, builtin_type_m68881_ext);
      regcache_raw_write (regcache, M68K_FP0_REGNUM, buf);
    }
  else if (TYPE_CODE (type) == TYPE_CODE_PTR)
    regcache_raw_write (regcache, M68K_A0_REGNUM, valbuf);
  else
    {
      if (len <= 4)
	regcache_raw_write_part (regcache, M68K_D0_REGNUM,
				 4 - len, len, valbuf);
      else if (len <= 8)
	{
	  regcache_raw_write_part (regcache, M68K_D1_REGNUM, 8 - len,
				   len - 4, valbuf);
	  regcache_raw_write (regcache, M68K_D0_REGNUM,
			      (char *) valbuf + (len - 4));
	}
      else
	internal_error (__FILE__, __LINE__,
			"Cannot store return value of %d bytes long.", len);
    }
}

/* Extract from an array REGBUF containing the (raw) register state
   the address in which a function should return its structure value,
   as a CORE_ADDR.  */

static CORE_ADDR
m68k_linux_extract_struct_value_address (struct regcache *regcache)
{
  char buf[4];

  regcache_cooked_read (regcache, M68K_A0_REGNUM, buf);
  return extract_unsigned_integer (buf, 4);
}

static void
m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  tdep->jb_pc = M68K_LINUX_JB_PC;
  tdep->jb_elt_size = M68K_LINUX_JB_ELEMENT_SIZE;
  tdep->get_sigtramp_info = m68k_linux_get_sigtramp_info;
  tdep->struct_return = reg_struct_return;

  set_gdbarch_extract_return_value (gdbarch, m68k_linux_extract_return_value);
  set_gdbarch_store_return_value (gdbarch, m68k_linux_store_return_value);
  set_gdbarch_deprecated_extract_struct_value_address (gdbarch, m68k_linux_extract_struct_value_address);

  set_gdbarch_pc_in_sigtramp (gdbarch, m68k_linux_pc_in_sigtramp);

  /* Shared library handling.  */
  set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
}

void
_initialize_m68k_linux_tdep (void)
{
  gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
			  m68k_linux_init_abi);
}
Commit	Line	Data
0a595803 AS	1	/* Motorola m68k target-dependent support for GNU/Linux.
0a595803 AS	2
d0b45d99	3	Copyright 1996, 1998, 2000, 2001, 2002, 2003 Free Software Foundation,
0a595803 AS	4	Inc.
	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
	20	Foundation, Inc., 59 Temple Place - Suite 330,
	21	Boston, MA 02111-1307, USA. */
	22
	23	#include "defs.h"
	24	#include "gdbcore.h"
8de307e0 AS	25	#include "doublest.h"
8de307e0 AS	26	#include "floatformat.h"
0a595803 AS	27	#include "frame.h"
0a595803 AS	28	#include "target.h"
d0b45d99 AS	29	#include "gdb_string.h"
d0b45d99 AS	30	#include "gdbtypes.h"
55809acb	31	#include "osabi.h"
eb2e12d7 AS	32	#include "regcache.h"
	33	#include "objfiles.h"
	34	#include "symtab.h"
d0b45d99	35	#include "m68k-tdep.h"
0a595803	36	\f
eb2e12d7 AS	37	/* Offsets (in target ints) into jmp_buf. */
	38
	39	#define M68K_LINUX_JB_ELEMENT_SIZE 4
	40	#define M68K_LINUX_JB_PC 7
	41
0a595803 AS	42	/* Check whether insn1 and insn2 are parts of a signal trampoline. */
	43
	44	#define IS_SIGTRAMP(insn1, insn2) \
	45	(/* addaw #20,sp; moveq #119,d0; trap #0 */ \
	46	(insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
	47	/* moveq #119,d0; trap #0 */ \
	48	\|\| insn1 == 0x70774e40)
	49
	50	#define IS_RT_SIGTRAMP(insn1, insn2) \
	51	(/* movel #173,d0; trap #0 */ \
	52	(insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
	53	/* moveq #82,d0; notb d0; trap #0 */ \
	54	\|\| (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
	55
8de307e0 AS	56	/* Return non-zero if PC points into the signal trampoline. For the
	57	sake of m68k_linux_get_sigtramp_info we also distinguish between
	58	non-RT and RT signal trampolines. */
0a595803	59
eb2e12d7 AS	60	static int
eb2e12d7 AS	61	m68k_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
0a595803 AS	62	{
	63	CORE_ADDR sp;
	64	char buf[12];
	65	unsigned long insn0, insn1, insn2;
	66
	67	if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
	68	return 0;
	69	insn1 = extract_unsigned_integer (buf + 4, 4);
	70	insn2 = extract_unsigned_integer (buf + 8, 4);
	71	if (IS_SIGTRAMP (insn1, insn2))
	72	return 1;
	73	if (IS_RT_SIGTRAMP (insn1, insn2))
	74	return 2;
	75
	76	insn0 = extract_unsigned_integer (buf, 4);
	77	if (IS_SIGTRAMP (insn0, insn1))
	78	return 1;
	79	if (IS_RT_SIGTRAMP (insn0, insn1))
	80	return 2;
	81
55809acb AS	82	insn0 = ((insn0 << 16) & 0xffffffff) \| (insn1 >> 16);
55809acb AS	83	insn1 = ((insn1 << 16) & 0xffffffff) \| (insn2 >> 16);
0a595803 AS	84	if (IS_SIGTRAMP (insn0, insn1))
	85	return 1;
	86	if (IS_RT_SIGTRAMP (insn0, insn1))
	87	return 2;
	88
	89	return 0;
	90	}
	91
8de307e0 AS	92	/* From <asm/sigcontext.h>. */
8de307e0 AS	93	static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
0a595803	94	{
8de307e0 AS	95	2 * 4, /* %d0 */
	96	3 * 4, /* %d1 */
	97	-1, /* %d2 */
	98	-1, /* %d3 */
	99	-1, /* %d4 */
	100	-1, /* %d5 */
	101	-1, /* %d6 */
	102	-1, /* %d7 */
	103	4 * 4, /* %a0 */
	104	5 * 4, /* %a1 */
	105	-1, /* %a2 */
	106	-1, /* %a3 */
	107	-1, /* %a4 */
	108	-1, /* %a5 */
	109	-1, /* %fp */
	110	1 * 4, /* %sp */
	111	5 * 4 + 2, /* %sr */
	112	6 * 4 + 2, /* %pc */
	113	8 * 4, /* %fp0 */
	114	11 * 4, /* %fp1 */
	115	-1, /* %fp2 */
	116	-1, /* %fp3 */
	117	-1, /* %fp4 */
	118	-1, /* %fp5 */
	119	-1, /* %fp6 */
	120	-1, /* %fp7 */
	121	14 * 4, /* %fpcr */
	122	15 * 4, /* %fpsr */
	123	16 * 4 /* %fpiaddr */
	124	};
	125
	126	/* From <asm/ucontext.h>. */
	127	static int m68k_linux_ucontext_reg_offset[M68K_NUM_REGS] =
	128	{
	129	6 * 4, /* %d0 */
	130	7 * 4, /* %d1 */
	131	8 * 4, /* %d2 */
	132	9 * 4, /* %d3 */
	133	10 * 4, /* %d4 */
	134	11 * 4, /* %d5 */
	135	12 * 4, /* %d6 */
	136	13 * 4, /* %d7 */
	137	14 * 4, /* %a0 */
	138	15 * 4, /* %a1 */
	139	16 * 4, /* %a2 */
	140	17 * 4, /* %a3 */
	141	18 * 4, /* %a4 */
	142	19 * 4, /* %a5 */
	143	20 * 4, /* %fp */
	144	21 * 4, /* %sp */
	145	23 * 4, /* %sr */
	146	22 * 4, /* %pc */
	147	27 * 4, /* %fp0 */
	148	30 * 4, /* %fp1 */
	149	33 * 4, /* %fp2 */
	150	36 * 4, /* %fp3 */
	151	39 * 4, /* %fp4 */
	152	42 * 4, /* %fp5 */
	153	45 * 4, /* %fp6 */
	154	48 * 4, /* %fp7 */
	155	24 * 4, /* %fpcr */
	156	25 * 4, /* %fpsr */
	157	26 * 4 /* %fpiaddr */
	158	};
159
160
161	/* Get info about saved registers in sigtramp. */
162
163	static struct m68k_sigtramp_info
164	m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
165	{
166	CORE_ADDR sp;
167	char buf[4];
168	struct m68k_sigtramp_info info;
169
170	frame_unwind_register (next_frame, M68K_SP_REGNUM, buf);
171	sp = extract_unsigned_integer (buf, 4);
0a595803 AS	172
0a595803 AS	173	/* Get sigcontext address, it is the third parameter on the stack. */
8de307e0 AS	174	info.sigcontext_addr = read_memory_unsigned_integer (sp + 8, 4);
	175
	176	if (m68k_linux_pc_in_sigtramp (frame_pc_unwind (next_frame), 0) == 2)
	177	info.sc_reg_offset = m68k_linux_ucontext_reg_offset;
0a595803	178	else
8de307e0 AS	179	info.sc_reg_offset = m68k_linux_sigcontext_reg_offset;
8de307e0 AS	180	return info;
0a595803 AS	181	}
0a595803 AS	182
8de307e0 AS	183	/* Extract from an array REGBUF containing the (raw) register state, a
	184	function return value of TYPE, and copy that, in virtual format,
	185	into VALBUF. */
0a595803	186
8de307e0 AS	187	static void
	188	m68k_linux_extract_return_value (struct type type, struct regcache regcache,
	189	void *valbuf)
0a595803	190	{
8de307e0 AS	191	int len = TYPE_LENGTH (type);
8de307e0 AS	192	char buf[M68K_MAX_REGISTER_SIZE];
d0b45d99	193
8de307e0 AS	194	if (TYPE_CODE (type) == TYPE_CODE_STRUCT
	195	&& TYPE_NFIELDS (type) == 1)
	196	{
	197	m68k_linux_extract_return_value (TYPE_FIELD_TYPE (type, 0), regcache,
	198	valbuf);
	199	return;
	200	}
55809acb	201
d0b45d99 AS	202	if (TYPE_CODE (type) == TYPE_CODE_FLT)
d0b45d99 AS	203	{
8de307e0 AS	204	regcache_raw_read (regcache, M68K_FP0_REGNUM, buf);
8de307e0 AS	205	convert_typed_floating (buf, builtin_type_m68881_ext, valbuf, type);
d0b45d99 AS	206	}
d0b45d99 AS	207	else if (TYPE_CODE (type) == TYPE_CODE_PTR)
8de307e0	208	regcache_raw_read (regcache, M68K_A0_REGNUM, valbuf);
d0b45d99	209	else
8de307e0 AS	210	{
	211	if (len <= 4)
	212	{
	213	regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
	214	memcpy (valbuf, buf + (4 - len), len);
	215	}
	216	else if (len <= 8)
	217	{
	218	regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
	219	memcpy (valbuf, buf + (8 - len), len - 4);
	220	regcache_raw_read (regcache, M68K_D1_REGNUM,
	221	(char *) valbuf + (len - 4));
	222	}
	223	else
	224	internal_error (__FILE__, __LINE__,
	225	"Cannot extract return value of %d bytes long.", len);
	226	}
d0b45d99 AS	227	}
d0b45d99 AS	228
8de307e0 AS	229	/* Write into the appropriate registers a function return value stored
8de307e0 AS	230	in VALBUF of type TYPE, given in virtual format. */
55809acb AS	231
55809acb AS	232	static void
8de307e0 AS	233	m68k_linux_store_return_value (struct type type, struct regcache regcache,
8de307e0 AS	234	const void *valbuf)
d0b45d99	235	{
8de307e0 AS	236	int len = TYPE_LENGTH (type);
	237
	238	if (TYPE_CODE (type) == TYPE_CODE_STRUCT
	239	&& TYPE_NFIELDS (type) == 1)
	240	{
	241	m68k_linux_store_return_value (TYPE_FIELD_TYPE (type, 0), regcache,
	242	valbuf);
	243	return;
	244	}
	245
d0b45d99 AS	246	if (TYPE_CODE (type) == TYPE_CODE_FLT)
d0b45d99 AS	247	{
8de307e0 AS	248	char buf[M68K_MAX_REGISTER_SIZE];
	249	convert_typed_floating (valbuf, type, buf, builtin_type_m68881_ext);
	250	regcache_raw_write (regcache, M68K_FP0_REGNUM, buf);
d0b45d99	251	}
8de307e0 AS	252	else if (TYPE_CODE (type) == TYPE_CODE_PTR)
8de307e0 AS	253	regcache_raw_write (regcache, M68K_A0_REGNUM, valbuf);
d0b45d99 AS	254	else
d0b45d99 AS	255	{
8de307e0 AS	256	if (len <= 4)
	257	regcache_raw_write_part (regcache, M68K_D0_REGNUM,
	258	4 - len, len, valbuf);
	259	else if (len <= 8)
	260	{
	261	regcache_raw_write_part (regcache, M68K_D1_REGNUM, 8 - len,
	262	len - 4, valbuf);
	263	regcache_raw_write (regcache, M68K_D0_REGNUM,
	264	(char *) valbuf + (len - 4));
	265	}
	266	else
	267	internal_error (__FILE__, __LINE__,
	268	"Cannot store return value of %d bytes long.", len);
d0b45d99 AS	269	}
	270	}
	271
55809acb AS	272	/* Extract from an array REGBUF containing the (raw) register state
	273	the address in which a function should return its structure value,
	274	as a CORE_ADDR. */
	275
	276	static CORE_ADDR
8de307e0	277	m68k_linux_extract_struct_value_address (struct regcache *regcache)
d0b45d99	278	{
8de307e0 AS	279	char buf[4];
	280
	281	regcache_cooked_read (regcache, M68K_A0_REGNUM, buf);
	282	return extract_unsigned_integer (buf, 4);
0a595803	283	}
55809acb AS	284
	285	static void
	286	m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
	287	{
eb2e12d7 AS	288	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
	289
	290	tdep->jb_pc = M68K_LINUX_JB_PC;
	291	tdep->jb_elt_size = M68K_LINUX_JB_ELEMENT_SIZE;
8de307e0	292	tdep->get_sigtramp_info = m68k_linux_get_sigtramp_info;
c481dac7	293	tdep->struct_return = reg_struct_return;
eb2e12d7	294
8de307e0 AS	295	set_gdbarch_extract_return_value (gdbarch, m68k_linux_extract_return_value);
8de307e0 AS	296	set_gdbarch_store_return_value (gdbarch, m68k_linux_store_return_value);
74055713	297	set_gdbarch_deprecated_extract_struct_value_address (gdbarch, m68k_linux_extract_struct_value_address);
eb2e12d7 AS	298
	299	set_gdbarch_pc_in_sigtramp (gdbarch, m68k_linux_pc_in_sigtramp);
	300
	301	/* Shared library handling. */
	302	set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
	303	set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
55809acb AS	304	}
	305
	306	void
	307	_initialize_m68k_linux_tdep (void)
	308	{
	309	gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
	310	m68k_linux_init_abi);
	311	}