Test for PR gdb/17511, spurious SIGTRAP after stepping into+in signal handler

[deliverable/binutils-gdb.git] / bfd / sparclynx.c

/* BFD support for Sparc binaries under LynxOS.
   Copyright (C) 1990-2014 Free Software Foundation, Inc.

   This file is part of BFD, the Binary File Descriptor library.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */


/* Do not "beautify" the CONCAT* macro args.  Traditional C will not
   remove whitespace added here, and thus will fail to concatenate
   the tokens.  */
#define MY(OP) CONCAT2 (sparc_aout_lynx_,OP)
#define TARGETNAME "a.out-sparc-lynx"

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"

#include "aout/sun4.h"
#include "libaout.h"		/* BFD a.out internal data structures */

#include "aout/aout64.h"
#include "aout/stab_gnu.h"
#include "aout/ar.h"

void NAME (lynx,set_arch_mach) (bfd *, unsigned long);
static void choose_reloc_size (bfd *);
static bfd_boolean NAME (aout,sparclynx_write_object_contents) (bfd *);

/* This is needed to reject a NewsOS file, e.g. in
   gdb/testsuite/gdb.t10/crossload.exp. <kingdon@cygnus.com>
   I needed to add M_UNKNOWN to recognize a 68000 object, so this will
   probably no longer reject a NewsOS object.  <ian@cygnus.com>.  */
#define MACHTYPE_OK(mtype) (   (mtype) == M_UNKNOWN \
			    || (mtype) == M_68010 \
			    || (mtype) == M_68020 \
			    || (mtype) == M_SPARC)

/* The file @code{aoutf1.h} contains the code for BFD's
   a.out back end. Control over the generated back end is given by these
   two preprocessor names:
   @table @code
   @item ARCH_SIZE
   This value should be either 32 or 64, depending upon the size of an
   int in the target format. It changes the sizes of the structs which
   perform the memory/disk mapping of structures.

   The 64 bit backend may only be used if the host compiler supports 64
   ints (eg long long with gcc), by defining the name @code{BFD_HOST_64_BIT} in @code{bfd.h}.
   With this name defined, @emph{all} bfd operations are performed with 64bit
   arithmetic, not just those to a 64bit target.

   @item TARGETNAME
   The name put into the target vector.
   @item
   @end table  */

void
NAME(lynx,set_arch_mach) (bfd *abfd, unsigned long machtype)
{
  /* Determine the architecture and machine type of the object file.  */
  enum bfd_architecture arch;
  unsigned long machine;

  switch (machtype)
    {
    case M_UNKNOWN:
      /* Some Sun3s make magic numbers without cpu types in them, so
	 we'll default to the 68000.  */
      arch = bfd_arch_m68k;
      machine = bfd_mach_m68000;
      break;

    case M_68010:
    case M_HP200:
      arch = bfd_arch_m68k;
      machine = bfd_mach_m68010;
      break;

    case M_68020:
    case M_HP300:
      arch = bfd_arch_m68k;
      machine = bfd_mach_m68020;
      break;

    case M_SPARC:
      arch = bfd_arch_sparc;
      machine = 0;
      break;

    case M_386:
    case M_386_DYNIX:
      arch = bfd_arch_i386;
      machine = 0;
      break;

    case M_HPUX:
      arch = bfd_arch_m68k;
      machine = 0;
      break;

    default:
      arch = bfd_arch_obscure;
      machine = 0;
      break;
    }
  bfd_set_arch_mach (abfd, arch, machine);
}

#define SET_ARCH_MACH(ABFD, EXEC) \
  NAME(lynx,set_arch_mach) (ABFD, N_MACHTYPE (EXEC)); \
  choose_reloc_size(ABFD);

/* Determine the size of a relocation entry, based on the architecture.  */

static void
choose_reloc_size (bfd *abfd)
{
  switch (bfd_get_arch (abfd))
    {
    case bfd_arch_sparc:
      obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
      break;
    default:
      obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
      break;
    }
}

/* Write an object file in LynxOS format.
  Section contents have already been written.  We write the
  file header, symbols, and relocation.  */

static bfd_boolean
NAME(aout,sparclynx_write_object_contents) (bfd *abfd)
{
  struct external_exec exec_bytes;
  struct internal_exec *execp = exec_hdr (abfd);

  /* Magic number, maestro, please!  */
  switch (bfd_get_arch (abfd))
    {
    case bfd_arch_m68k:
      switch (bfd_get_mach (abfd))
	{
	case bfd_mach_m68010:
	  N_SET_MACHTYPE (*execp, M_68010);
	  break;
	default:
	case bfd_mach_m68020:
	  N_SET_MACHTYPE (*execp, M_68020);
	  break;
	}
      break;
    case bfd_arch_sparc:
      N_SET_MACHTYPE (*execp, M_SPARC);
      break;
    case bfd_arch_i386:
      N_SET_MACHTYPE (*execp, M_386);
      break;
    default:
      N_SET_MACHTYPE (*execp, M_UNKNOWN);
    }

  choose_reloc_size (abfd);

  N_SET_FLAGS (*execp, aout_backend_info (abfd)->exec_hdr_flags);

  WRITE_HEADERS (abfd, execp);

  return TRUE;
}

#define MY_set_sizes sparclynx_set_sizes
static bfd_boolean sparclynx_set_sizes (bfd *);

static bfd_boolean
sparclynx_set_sizes (bfd *abfd)
{
  switch (bfd_get_arch (abfd))
    {
    default:
      return FALSE;
    case bfd_arch_sparc:
      adata (abfd).page_size = 0x2000;
      adata (abfd).segment_size = 0x2000;
      adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE;
      return TRUE;
    case bfd_arch_m68k:
      adata (abfd).page_size = 0x2000;
      adata (abfd).segment_size = 0x20000;
      adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE;
      return TRUE;
    }
}

static const struct aout_backend_data sparclynx_aout_backend =
  {
    0, 1, 0, 1, 0, sparclynx_set_sizes, 0,
    0,				/* add_dynamic_symbols */
    0,				/* add_one_symbol */
    0,				/* link_dynamic_object */
    0,				/* write_dynamic_symbol */
    0,				/* check_dynamic_reloc */
    0				/* finish_dynamic_link */
  };
\f

#define MY_bfd_debug_info_start		bfd_void
#define MY_bfd_debug_info_end		bfd_void
#define MY_bfd_debug_info_accumulate	\
		(void (*) (bfd *, struct bfd_section *)) bfd_void

#define MY_write_object_contents	NAME(aout,sparclynx_write_object_contents)
#define MY_backend_data			&sparclynx_aout_backend

#define TARGET_IS_BIG_ENDIAN_P

#ifdef LYNX_CORE

char * lynx_core_file_failing_command ();
int lynx_core_file_failing_signal ();
bfd_boolean lynx_core_file_matches_executable_p ();
const bfd_target * lynx_core_file_p ();

#define	MY_core_file_failing_command lynx_core_file_failing_command
#define	MY_core_file_failing_signal lynx_core_file_failing_signal
#define	MY_core_file_matches_executable_p lynx_core_file_matches_executable_p
#define	MY_core_file_p lynx_core_file_p

#endif /* LYNX_CORE */

#include "aout-target.h"