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

/* Target-dependent code for PowerPC systems running FreeBSD.

   Copyright (C) 2013-2015 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 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 "arch-utils.h"
#include "frame.h"
#include "gdbcore.h"
#include "frame-unwind.h"
#include "gdbtypes.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "symtab.h"
#include "target.h"
#include "trad-frame.h"

#include "ppc-tdep.h"
#include "ppc64-tdep.h"
#include "ppcfbsd-tdep.h"
#include "fbsd-tdep.h"
#include "solib-svr4.h"


/* 32-bit regset descriptions.  */

static const struct ppc_reg_offsets ppc32_fbsd_reg_offsets =
  {
	/* General-purpose registers.  */
	/* .r0_offset = */     0,
	/* .gpr_size = */      4,
	/* .xr_size = */       4,
	/* .pc_offset = */     144,
	/* .ps_offset = */     -1,
	/* .cr_offset = */     132,
	/* .lr_offset = */     128,
	/* .ctr_offset = */    140,
	/* .xer_offset = */    136,
	/* .mq_offset = */     -1,

	/* Floating-point registers.  */
	/* .f0_offset = */     0,
	/* .fpscr_offset = */  256,
	/* .fpscr_size = */    8,
#ifdef NOTYET
	/* AltiVec registers.  */
	/* .vr0_offset = */    0,
	/* .vscr_offset = */   512 + 12,
	/* .vrsave_offset = */ 512
#endif
  };

/* 64-bit regset descriptions.  */

static const struct ppc_reg_offsets ppc64_fbsd_reg_offsets =
  {
	/* General-purpose registers.  */
	/* .r0_offset = */     0,
	/* .gpr_size = */      8,
	/* .xr_size = */       8,
	/* .pc_offset = */     288,
	/* .ps_offset = */     -1,
	/* .cr_offset = */     264,
	/* .lr_offset = */     256,
	/* .ctr_offset = */    280,
	/* .xer_offset = */    272,
	/* .mq_offset = */     -1,

	/* Floating-point registers.  */
	/* .f0_offset = */     0,
	/* .fpscr_offset = */  256,
	/* .fpscr_size = */    8,
#ifdef NOYET
	/* AltiVec registers.  */
	/* .vr0_offset = */    0,
	/* .vscr_offset = */   512 + 12,
	/* .vrsave_offset = */ 528
#endif
  };

/* 32-bit general-purpose register set.  */

static const struct regset ppc32_fbsd_gregset = {
  &ppc32_fbsd_reg_offsets,
  ppc_supply_gregset,
  ppc_collect_gregset
};

/* 64-bit general-purpose register set.  */

static const struct regset ppc64_fbsd_gregset = {
  &ppc64_fbsd_reg_offsets,
  ppc_supply_gregset,
  ppc_collect_gregset
};

/* 32-/64-bit floating-point register set.  */

static const struct regset ppc32_fbsd_fpregset = {
  &ppc32_fbsd_reg_offsets,
  ppc_supply_fpregset,
  ppc_collect_fpregset
};

const struct regset *
ppc_fbsd_gregset (int wordsize)
{
  return wordsize == 8 ? &ppc64_fbsd_gregset : &ppc32_fbsd_gregset;
}

const struct regset *
ppc_fbsd_fpregset (void)
{
  return &ppc32_fbsd_fpregset;
}

/* Iterate over core file register note sections.  */

static void
ppcfbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
				      iterate_over_regset_sections_cb *cb,
				      void *cb_data,
				      const struct regcache *regcache)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  if (tdep->wordsize == 4)
    cb (".reg", 148, &ppc32_fbsd_gregset, NULL, cb_data);
  else
    cb (".reg", 296, &ppc64_fbsd_gregset, NULL, cb_data);
  cb (".reg2", 264, &ppc32_fbsd_fpregset, NULL, cb_data);
}

/* Default page size.  */

static const int ppcfbsd_page_size = 4096;

/* Offset for sigreturn(2).  */

static const int ppcfbsd_sigreturn_offset[] = {
  0xc,				/* FreeBSD 32-bit  */
  -1
};

/* Signal trampolines.  */

static int
ppcfbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
				struct frame_info *this_frame,
				void **this_cache)
{
  struct gdbarch *gdbarch = get_frame_arch (this_frame);
  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
  CORE_ADDR pc = get_frame_pc (this_frame);
  CORE_ADDR start_pc = (pc & ~(ppcfbsd_page_size - 1));
  const int *offset;
  const char *name;

  /* A stack trampoline is detected if no name is associated
   to the current pc and if it points inside a trampoline
   sequence.  */

  find_pc_partial_function (pc, &name, NULL, NULL);

  /* If we have a name, we have no trampoline, return.  */
  if (name)
    return 0;

  for (offset = ppcfbsd_sigreturn_offset; *offset != -1; offset++)
    {
      gdb_byte buf[2 * PPC_INSN_SIZE];
      unsigned long insn;

      if (!safe_frame_unwind_memory (this_frame, start_pc + *offset,
				     buf, sizeof buf))
	continue;

      /* Check for "li r0,SYS_sigreturn".  */
      insn = extract_unsigned_integer (buf, PPC_INSN_SIZE, byte_order);
      if (insn != 0x380001a1)
	continue;

      /* Check for "sc".  */
      insn = extract_unsigned_integer (buf + PPC_INSN_SIZE,
				       PPC_INSN_SIZE, byte_order);
      if (insn != 0x44000002)
	continue;

      return 1;
    }

  return 0;
}

static struct trad_frame_cache *
ppcfbsd_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
{
  struct gdbarch *gdbarch = get_frame_arch (this_frame);
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
  struct trad_frame_cache *cache;
  CORE_ADDR addr, base, func;
  gdb_byte buf[PPC_INSN_SIZE];
  int i;

  if (*this_cache)
    return (struct trad_frame_cache *) *this_cache;

  cache = trad_frame_cache_zalloc (this_frame);
  *this_cache = cache;

  func = get_frame_pc (this_frame);
  func &= ~(ppcfbsd_page_size - 1);
  if (!safe_frame_unwind_memory (this_frame, func, buf, sizeof buf))
    return cache;

  base = get_frame_register_unsigned (this_frame, gdbarch_sp_regnum (gdbarch));
  addr = base + 0x10 + 2 * tdep->wordsize;
  for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
    {
      int regnum = i + tdep->ppc_gp0_regnum;
      trad_frame_set_reg_addr (cache, regnum, addr);
    }
  trad_frame_set_reg_addr (cache, tdep->ppc_lr_regnum, addr);
  addr += tdep->wordsize;
  trad_frame_set_reg_addr (cache, tdep->ppc_cr_regnum, addr);
  addr += tdep->wordsize;
  trad_frame_set_reg_addr (cache, tdep->ppc_xer_regnum, addr);
  addr += tdep->wordsize;
  trad_frame_set_reg_addr (cache, tdep->ppc_ctr_regnum, addr);
  addr += tdep->wordsize;
  trad_frame_set_reg_addr (cache, gdbarch_pc_regnum (gdbarch), addr);
  /* SRR0?  */
  addr += tdep->wordsize;

  /* Construct the frame ID using the function start.  */
  trad_frame_set_id (cache, frame_id_build (base, func));

  return cache;
}

static void
ppcfbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
				void **this_cache, struct frame_id *this_id)
{
  struct trad_frame_cache *cache =
    ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);

  trad_frame_get_id (cache, this_id);
}

static struct value *
ppcfbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
				      void **this_cache, int regnum)
{
  struct trad_frame_cache *cache =
    ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);

  return trad_frame_get_register (cache, this_frame, regnum);
}

static const struct frame_unwind ppcfbsd_sigtramp_frame_unwind = {
  SIGTRAMP_FRAME,
  default_frame_unwind_stop_reason,
  ppcfbsd_sigtramp_frame_this_id,
  ppcfbsd_sigtramp_frame_prev_register,
  NULL,
  ppcfbsd_sigtramp_frame_sniffer
};

static enum return_value_convention
ppcfbsd_return_value (struct gdbarch *gdbarch, struct value *function,
		      struct type *valtype, struct regcache *regcache,
		      gdb_byte *readbuf, const gdb_byte *writebuf)
{
  return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype,
					   regcache, readbuf, writebuf);
}


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

  /* Generic FreeBSD support. */
  fbsd_init_abi (info, gdbarch);

  /* FreeBSD doesn't support the 128-bit `long double' from the psABI.  */
  set_gdbarch_long_double_bit (gdbarch, 64);
  set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);

  if (tdep->wordsize == 4)
    {
      set_gdbarch_return_value (gdbarch, ppcfbsd_return_value);

      set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
      set_solib_svr4_fetch_link_map_offsets (gdbarch,
					     svr4_ilp32_fetch_link_map_offsets);

      frame_unwind_append_unwinder (gdbarch, &ppcfbsd_sigtramp_frame_unwind);
      set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc");
    }

  if (tdep->wordsize == 8)
    {
      set_gdbarch_convert_from_func_ptr_addr
	(gdbarch, ppc64_convert_from_func_ptr_addr);
      set_gdbarch_elf_make_msymbol_special (gdbarch,
					    ppc64_elf_make_msymbol_special);

      set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
      set_solib_svr4_fetch_link_map_offsets (gdbarch,
					     svr4_lp64_fetch_link_map_offsets);
      set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc");
    }

  set_gdbarch_iterate_over_regset_sections
    (gdbarch, ppcfbsd_iterate_over_regset_sections);

  set_gdbarch_fetch_tls_load_module_address (gdbarch,
					     svr4_fetch_objfile_link_map);
}

/* Provide a prototype to silence -Wmissing-prototypes.  */

void _initialize_ppcfbsd_tdep (void);

void
_initialize_ppcfbsd_tdep (void)
{
  gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_FREEBSD_ELF,
			  ppcfbsd_init_abi);
  gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64,
			  GDB_OSABI_FREEBSD_ELF,
			  ppcfbsd_init_abi);
  gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_FREEBSD_ELF,
			  ppcfbsd_init_abi);
}
Commit	Line	Data
dc18f110 AT	1	/* Target-dependent code for PowerPC systems running FreeBSD.
dc18f110 AT	2
32d0add0	3	Copyright (C) 2013-2015 Free Software Foundation, Inc.
dc18f110 AT	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "defs.h"
	21	#include "arch-utils.h"
	22	#include "frame.h"
	23	#include "gdbcore.h"
	24	#include "frame-unwind.h"
	25	#include "gdbtypes.h"
	26	#include "osabi.h"
	27	#include "regcache.h"
	28	#include "regset.h"
	29	#include "symtab.h"
	30	#include "target.h"
	31	#include "trad-frame.h"
	32
dc18f110 AT	33	#include "ppc-tdep.h"
	34	#include "ppc64-tdep.h"
	35	#include "ppcfbsd-tdep.h"
23ea9aeb	36	#include "fbsd-tdep.h"
dc18f110 AT	37	#include "solib-svr4.h"
	38
	39
	40	/* 32-bit regset descriptions. */
	41
	42	static const struct ppc_reg_offsets ppc32_fbsd_reg_offsets =
	43	{
	44	/* General-purpose registers. */
	45	/* .r0_offset = */ 0,
	46	/* .gpr_size = */ 4,
	47	/* .xr_size = */ 4,
	48	/* .pc_offset = */ 144,
	49	/* .ps_offset = */ -1,
	50	/* .cr_offset = */ 132,
	51	/* .lr_offset = */ 128,
	52	/* .ctr_offset = */ 140,
	53	/* .xer_offset = */ 136,
	54	/* .mq_offset = */ -1,
	55
	56	/* Floating-point registers. */
	57	/* .f0_offset = */ 0,
	58	/* .fpscr_offset = */ 256,
	59	/* .fpscr_size = */ 8,
	60	#ifdef NOTYET
	61	/* AltiVec registers. */
	62	/* .vr0_offset = */ 0,
	63	/* .vscr_offset = */ 512 + 12,
	64	/* .vrsave_offset = */ 512
	65	#endif
	66	};
	67
	68	/* 64-bit regset descriptions. */
	69
	70	static const struct ppc_reg_offsets ppc64_fbsd_reg_offsets =
	71	{
	72	/* General-purpose registers. */
	73	/* .r0_offset = */ 0,
	74	/* .gpr_size = */ 8,
	75	/* .xr_size = */ 8,
	76	/* .pc_offset = */ 288,
	77	/* .ps_offset = */ -1,
	78	/* .cr_offset = */ 264,
	79	/* .lr_offset = */ 256,
	80	/* .ctr_offset = */ 280,
	81	/* .xer_offset = */ 272,
	82	/* .mq_offset = */ -1,
	83
	84	/* Floating-point registers. */
	85	/* .f0_offset = */ 0,
	86	/* .fpscr_offset = */ 256,
	87	/* .fpscr_size = */ 8,
	88	#ifdef NOYET
	89	/* AltiVec registers. */
	90	/* .vr0_offset = */ 0,
	91	/* .vscr_offset = */ 512 + 12,
	92	/* .vrsave_offset = */ 528
	93	#endif
	94	};
	95
	96	/* 32-bit general-purpose register set. */
	97
	98	static const struct regset ppc32_fbsd_gregset = {
	99	&ppc32_fbsd_reg_offsets,
	100	ppc_supply_gregset,
09424cff	101	ppc_collect_gregset
dc18f110 AT	102	};
	103
	104	/* 64-bit general-purpose register set. */
	105
	106	static const struct regset ppc64_fbsd_gregset = {
	107	&ppc64_fbsd_reg_offsets,
	108	ppc_supply_gregset,
09424cff	109	ppc_collect_gregset
dc18f110 AT	110	};
	111
	112	/* 32-/64-bit floating-point register set. */
	113
3ca7dae4	114	static const struct regset ppc32_fbsd_fpregset = {
dc18f110 AT	115	&ppc32_fbsd_reg_offsets,
	116	ppc_supply_fpregset,
	117	ppc_collect_fpregset
	118	};
	119
	120	const struct regset *
	121	ppc_fbsd_gregset (int wordsize)
	122	{
	123	return wordsize == 8 ? &ppc64_fbsd_gregset : &ppc32_fbsd_gregset;
	124	}
	125
	126	const struct regset *
	127	ppc_fbsd_fpregset (void)
	128	{
	129	return &ppc32_fbsd_fpregset;
	130	}
	131
23ea9aeb	132	/* Iterate over core file register note sections. */
dc18f110	133
23ea9aeb AA	134	static void
	135	ppcfbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
	136	iterate_over_regset_sections_cb *cb,
	137	void *cb_data,
	138	const struct regcache *regcache)
dc18f110 AT	139	{
dc18f110 AT	140	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
23ea9aeb AA	141
	142	if (tdep->wordsize == 4)
	143	cb (".reg", 148, &ppc32_fbsd_gregset, NULL, cb_data);
	144	else
	145	cb (".reg", 296, &ppc64_fbsd_gregset, NULL, cb_data);
	146	cb (".reg2", 264, &ppc32_fbsd_fpregset, NULL, cb_data);
dc18f110 AT	147	}
	148
	149	/* Default page size. */
	150
	151	static const int ppcfbsd_page_size = 4096;
	152
	153	/* Offset for sigreturn(2). */
	154
	155	static const int ppcfbsd_sigreturn_offset[] = {
	156	0xc, /* FreeBSD 32-bit */
	157	-1
	158	};
	159
	160	/* Signal trampolines. */
	161
	162	static int
	163	ppcfbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
	164	struct frame_info *this_frame,
	165	void **this_cache)
	166	{
	167	struct gdbarch *gdbarch = get_frame_arch (this_frame);
	168	enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
	169	CORE_ADDR pc = get_frame_pc (this_frame);
	170	CORE_ADDR start_pc = (pc & ~(ppcfbsd_page_size - 1));
	171	const int *offset;
	172	const char *name;
	173
	174	/* A stack trampoline is detected if no name is associated
	175	to the current pc and if it points inside a trampoline
	176	sequence. */
	177
	178	find_pc_partial_function (pc, &name, NULL, NULL);
	179
	180	/* If we have a name, we have no trampoline, return. */
	181	if (name)
	182	return 0;
	183
	184	for (offset = ppcfbsd_sigreturn_offset; *offset != -1; offset++)
	185	{
	186	gdb_byte buf[2 * PPC_INSN_SIZE];
	187	unsigned long insn;
	188
	189	if (!safe_frame_unwind_memory (this_frame, start_pc + *offset,
	190	buf, sizeof buf))
	191	continue;
	192
	193	/* Check for "li r0,SYS_sigreturn". */
	194	insn = extract_unsigned_integer (buf, PPC_INSN_SIZE, byte_order);
	195	if (insn != 0x380001a1)
	196	continue;
	197
	198	/* Check for "sc". */
	199	insn = extract_unsigned_integer (buf + PPC_INSN_SIZE,
	200	PPC_INSN_SIZE, byte_order);
	201	if (insn != 0x44000002)
	202	continue;
	203
	204	return 1;
	205	}
	206
	207	return 0;
	208	}
	209
	210	static struct trad_frame_cache *
211	ppcfbsd_sigtramp_frame_cache (struct frame_info this_frame, void *this_cache)
212	{
213	struct gdbarch *gdbarch = get_frame_arch (this_frame);
214	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
215	enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
216	struct trad_frame_cache *cache;
217	CORE_ADDR addr, base, func;
218	gdb_byte buf[PPC_INSN_SIZE];
219	int i;
220
221	if (*this_cache)
19ba03f4	222	return (struct trad_frame_cache ) this_cache;
dc18f110 AT	223
	224	cache = trad_frame_cache_zalloc (this_frame);
	225	*this_cache = cache;
	226
	227	func = get_frame_pc (this_frame);
	228	func &= ~(ppcfbsd_page_size - 1);
	229	if (!safe_frame_unwind_memory (this_frame, func, buf, sizeof buf))
	230	return cache;
	231
	232	base = get_frame_register_unsigned (this_frame, gdbarch_sp_regnum (gdbarch));
	233	addr = base + 0x10 + 2 * tdep->wordsize;
	234	for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
	235	{
	236	int regnum = i + tdep->ppc_gp0_regnum;
	237	trad_frame_set_reg_addr (cache, regnum, addr);
	238	}
	239	trad_frame_set_reg_addr (cache, tdep->ppc_lr_regnum, addr);
	240	addr += tdep->wordsize;
	241	trad_frame_set_reg_addr (cache, tdep->ppc_cr_regnum, addr);
	242	addr += tdep->wordsize;
	243	trad_frame_set_reg_addr (cache, tdep->ppc_xer_regnum, addr);
	244	addr += tdep->wordsize;
	245	trad_frame_set_reg_addr (cache, tdep->ppc_ctr_regnum, addr);
	246	addr += tdep->wordsize;
	247	trad_frame_set_reg_addr (cache, gdbarch_pc_regnum (gdbarch), addr);
	248	/* SRR0? */
	249	addr += tdep->wordsize;
	250
	251	/* Construct the frame ID using the function start. */
	252	trad_frame_set_id (cache, frame_id_build (base, func));
	253
	254	return cache;
	255	}
	256
	257	static void
	258	ppcfbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
	259	void *this_cache, struct frame_id this_id)
	260	{
	261	struct trad_frame_cache *cache =
	262	ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);
	263
	264	trad_frame_get_id (cache, this_id);
	265	}
	266
	267	static struct value *
	268	ppcfbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
	269	void **this_cache, int regnum)
	270	{
	271	struct trad_frame_cache *cache =
	272	ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);
	273
	274	return trad_frame_get_register (cache, this_frame, regnum);
	275	}
	276
	277	static const struct frame_unwind ppcfbsd_sigtramp_frame_unwind = {
	278	SIGTRAMP_FRAME,
	279	default_frame_unwind_stop_reason,
	280	ppcfbsd_sigtramp_frame_this_id,
	281	ppcfbsd_sigtramp_frame_prev_register,
	282	NULL,
	283	ppcfbsd_sigtramp_frame_sniffer
	284	};
	285
	286	static enum return_value_convention
287	ppcfbsd_return_value (struct gdbarch gdbarch, struct value function,
288	struct type valtype, struct regcache regcache,
289	gdb_byte readbuf, const gdb_byte writebuf)
290	{
291	return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype,
292	regcache, readbuf, writebuf);
293	}
294
295
296	static void
297	ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
298	{
299	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
300
23ea9aeb AA	301	/* Generic FreeBSD support. */
	302	fbsd_init_abi (info, gdbarch);
	303
dc18f110 AT	304	/* FreeBSD doesn't support the 128-bit `long double' from the psABI. */
	305	set_gdbarch_long_double_bit (gdbarch, 64);
	306	set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
	307
	308	if (tdep->wordsize == 4)
	309	{
	310	set_gdbarch_return_value (gdbarch, ppcfbsd_return_value);
	311
	312	set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
	313	set_solib_svr4_fetch_link_map_offsets (gdbarch,
	314	svr4_ilp32_fetch_link_map_offsets);
	315
	316	frame_unwind_append_unwinder (gdbarch, &ppcfbsd_sigtramp_frame_unwind);
	317	set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc");
	318	}
	319
	320	if (tdep->wordsize == 8)
	321	{
	322	set_gdbarch_convert_from_func_ptr_addr
	323	(gdbarch, ppc64_convert_from_func_ptr_addr);
24c274a1 AM	324	set_gdbarch_elf_make_msymbol_special (gdbarch,
	325	ppc64_elf_make_msymbol_special);
	326
dc18f110 AT	327	set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
	328	set_solib_svr4_fetch_link_map_offsets (gdbarch,
	329	svr4_lp64_fetch_link_map_offsets);
	330	set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc");
	331	}
	332
23ea9aeb AA	333	set_gdbarch_iterate_over_regset_sections
23ea9aeb AA	334	(gdbarch, ppcfbsd_iterate_over_regset_sections);
dc18f110 AT	335
	336	set_gdbarch_fetch_tls_load_module_address (gdbarch,
	337	svr4_fetch_objfile_link_map);
	338	}
	339
	340	/* Provide a prototype to silence -Wmissing-prototypes. */
	341
	342	void _initialize_ppcfbsd_tdep (void);
	343
	344	void
	345	_initialize_ppcfbsd_tdep (void)
	346	{
	347	gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_FREEBSD_ELF,
	348	ppcfbsd_init_abi);
	349	gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64,
	350	GDB_OSABI_FREEBSD_ELF,
	351	ppcfbsd_init_abi);
	352	gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_FREEBSD_ELF,
	353	ppcfbsd_init_abi);
	354	}