Subversion Repositories openrisc

/* Definitions for Rs6000 running LynxOS.

   Copyright (C) 1995, 1996, 2000, 2002, 2003, 2004, 2005, 2007, 2010, 2011

   Free Software Foundation, Inc.

   Contributed by David Henkel-Wallace, Cygnus Support (gumby@cygnus.com)

   Rewritten by Adam Nemet, LynuxWorks Inc.

   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/>.  */

/* Undefine the definition to enable the LynxOS default from the

   top-level lynx.h.  */

#undef SUBTARGET_EXTRA_SPECS

/* Get rid off the spec definitions from rs6000/sysv4.h.  */

#undef CPP_SPEC

#define CPP_SPEC \

"%{msoft-float: -D_SOFT_FLOAT} \

 %(cpp_cpu) \

 %(cpp_os_lynx)"

/* LynxOS only supports big-endian on PPC so we override the

   definition from sysv4.h.  Since the LynxOS 4.0 compiler was set to

   return every structure in memory regardless of their size we have

   to emulate the same behavior here with disabling the SVR4 structure

   returning.  */

#undef CC1_SPEC

#define CC1_SPEC \

"%{G*} %{mno-sdata:-msdata=none} \

 %{maltivec:-mabi=altivec} \

 -maix-struct-return"

#undef ASM_SPEC

#define ASM_SPEC \

"%(asm_cpu) \

 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}"

#undef STARTFILE_SPEC

#undef ENDFILE_SPEC

#undef LIB_SPEC

#undef LINK_SPEC

#define LINK_SPEC \

"%{!msdata=none:%{G*}} %{msdata=none:-G0} \

 %(link_os_lynx)"

/* Override the definition from sysv4.h.  */

#undef TARGET_OS_CPP_BUILTINS

#define TARGET_OS_CPP_BUILTINS()                \

  do                                            \

    {                                           \

      builtin_define ("__BIG_ENDIAN__");        \

      builtin_define ("__powerpc__");           \

      builtin_assert ("cpu=powerpc");           \

      builtin_assert ("machine=powerpc");       \

      builtin_define ("__PPC__");               \

    }                                           \

  while (0)

/* Override the rs6000.h definition.  */

#undef ASM_APP_ON

#define ASM_APP_ON "#APP\n"

/* Override the rs6000.h definition.  */

#undef ASM_APP_OFF

#define ASM_APP_OFF "#NO_APP\n"

/* LynxOS does not do anything with .fixup plus let's not create

   writable section for linkonce.r and linkonce.t.  */

#undef RELOCATABLE_NEEDS_FIXUP

/* Override these from rs6000.h with the generic definition.  */

#undef SIZE_TYPE

#undef ASM_OUTPUT_ALIGN

#undef PREFERRED_DEBUGGING_TYPE

/* The file rs6000.c defines TARGET_HAVE_TLS unconditionally to the

   value of HAVE_AS_TLS.  HAVE_AS_TLS is true as gas support for TLS

   is detected by configure.  Override the definition to false.  */

#undef HAVE_AS_TLS

#define HAVE_AS_TLS 0

#define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)

#ifdef CRT_BEGIN

/* This function is part of crtbegin*.o which is at the beginning of

   the link and is called from .fini which is usually toward the end

   of the executable.  Make it longcall so that we don't limit the

   text size of the executables to 32M.  */

static void __do_global_dtors_aux (void) __attribute__ ((longcall));

#endif  /* CRT_BEGIN */

#ifdef CRT_END

/* Similarly here.  This function resides in crtend*.o which is toward

   to end of the link and is called from .init which is at the

   beginning.  */

static void __do_global_ctors_aux (void) __attribute__ ((longcall));

#endif  /* CRT_END */