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/* Definitions for ARM running Linux-based GNU systems using ELF

   Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,

   2005, 2006, 2007, 2008

   Free Software Foundation, Inc.

   Contributed by Philip Blundell <philb@gnu.org>

   This file is part of GCC.

   GCC 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, or (at your

   option) any later version.

   GCC 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 GCC; see the file COPYING3.  If not see

   <http://www.gnu.org/licenses/>.  */

/* elfos.h should have already been included.  Now just override

   any conflicting definitions and add any extras.  */

/* Run-time Target Specification.  */

#undef  TARGET_VERSION

#define TARGET_VERSION  fputs (" (ARM GNU/Linux with ELF)", stderr);

#undef  TARGET_DEFAULT_FLOAT_ABI

#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD

/* TARGET_BIG_ENDIAN_DEFAULT is set in

   config.gcc for big endian configurations.  */

#if TARGET_BIG_ENDIAN_DEFAULT

#define TARGET_ENDIAN_DEFAULT    MASK_BIG_END

#define TARGET_ENDIAN_OPTION     "mbig-endian"

#define TARGET_LINKER_EMULATION  "armelfb_linux"

#else

#define TARGET_ENDIAN_DEFAULT    0

#define TARGET_ENDIAN_OPTION     "mlittle-endian"

#define TARGET_LINKER_EMULATION  "armelf_linux"

#endif

#undef  TARGET_DEFAULT

#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)

#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"

#undef  MULTILIB_DEFAULTS

#define MULTILIB_DEFAULTS \

        { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }

/* Now we define the strings used to build the spec file.  */

#undef  LIB_SPEC

#define LIB_SPEC \

  "%{pthread:-lpthread} \

   %{shared:-lc} \

   %{!shared:%{profile:-lc_p}%{!profile:-lc}}"

#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-lfloat} -lgcc"

#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"

#define LINUX_TARGET_LINK_SPEC  "%{h*} %{version:-v} \

   %{b} \

   %{static:-Bstatic} \

   %{shared:-shared} \

   %{symbolic:-Bsymbolic} \

   %{rdynamic:-export-dynamic} \

   %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \

   -X \

   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \

   SUBTARGET_EXTRA_LINK_SPEC

#undef  LINK_SPEC

#define LINK_SPEC LINUX_TARGET_LINK_SPEC

#define TARGET_OS_CPP_BUILTINS()                \

  do                                            \

    {                                           \

        LINUX_TARGET_OS_CPP_BUILTINS();         \

    }                                           \

  while (0)

/* This is how we tell the assembler that two symbols have the same value.  */

#define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \

  do                                       \

    {                                      \

      assemble_name (FILE, NAME1);         \

      fputs (" = ", FILE);                 \

      assemble_name (FILE, NAME2);         \

      fputc ('\n', FILE);                  \

    }                                      \

  while (0)

/* NWFPE always understands FPA instructions.  */

#undef  FPUTYPE_DEFAULT

#define FPUTYPE_DEFAULT "fpe3"

/* Call the function profiler with a given profile label.  */

#undef  ARM_FUNCTION_PROFILER

#define ARM_FUNCTION_PROFILER(STREAM, LABELNO)                          \

{                                                                       \

  fprintf (STREAM, "\tbl\tmcount%s\n",                                  \

           (TARGET_ARM && NEED_PLT_RELOC) ? "(PLT)" : "");              \

}

/* The GNU/Linux profiler clobbers the link register.  Make sure the

   prologue knows to save it.  */

#define PROFILE_HOOK(X)                                         \

  emit_clobber (gen_rtx_REG (SImode, LR_REGNUM))

/* The GNU/Linux profiler needs a frame pointer.  */

#define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile

/* Add .note.GNU-stack.  */

#undef NEED_INDICATE_EXEC_STACK

#define NEED_INDICATE_EXEC_STACK        1