netbsd-elf.h

linux下的gcc编译器

/* Definitions for SH running NetBSD using ELF
   Copyright (C) 2002 Free Software Foundation, Inc.
   Contributed by Wasabi Systems, Inc.

This file is part of GNU CC.

GNU CC 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, or (at your option)
any later version.

GNU CC 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; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Run-time Target Specification.  */
#if TARGET_ENDIAN_DEFAULT == LITTLE_ENDIAN_BIT
#define TARGET_VERSION_ENDIAN "le"
#else
#define TARGET_VERSION_ENDIAN ""
#endif

#if TARGET_CPU_DEFAULT & SH5_BIT
#if TARGET_CPU_DEFAULT & SH3E_BIT
#define TARGET_VERSION_CPU "sh5"
#else
#define TARGET_VERSION_CPU "sh64"
#endif /* SH3E_BIT */
#else
#define TARGET_VERSION_CPU "sh"
#endif /* SH5_BIT */

#undef TARGET_VERSION
#define TARGET_VERSION	fprintf (stderr, " (NetBSD/%s%s ELF)",		\
                                 TARGET_VERSION_CPU, TARGET_VERSION_ENDIAN)


/* Extra specs needed for NetBSD SuperH ELF targets.  */

#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS						\
  { "netbsd_entry_point", NETBSD_ENTRY_POINT },


#define TARGET_OS_CPP_BUILTINS()					\
  do									\
    {									\
      NETBSD_OS_CPP_BUILTINS_ELF();					\
      if (TARGET_SHMEDIA64)						\
	NETBSD_OS_CPP_BUILTINS_LP64();					\
      builtin_define ("__NO_LEADING_UNDERSCORES__");			\
    }									\
  while (0)

/* Provide a LINK_SPEC appropriate for a NetBSD/sh ELF target.
   We use the SH_LINK_SPEC from sh/sh.h, and define the appropriate
   SUBTARGET_LINK_SPEC that pulls in what we need from a generic
   NetBSD ELF LINK_SPEC.  */

/* LINK_EMUL_PREFIX from sh/elf.h */

#undef LINK_DEFAULT_CPU_EMUL
#if TARGET_CPU_DEFAULT & SH5_BIT
#if TARGET_CPU_DEFAULT & SH3E_BIT
#define LINK_DEFAULT_CPU_EMUL "32"
#else
#define LINK_DEFAULT_CPU_EMUL "64"
#endif /* SH3E_BIT */
#else
#define LINK_DEFAULT_CPU_EMUL ""
#endif /* SH5_BIT */

#undef SUBTARGET_LINK_EMUL_SUFFIX
#define SUBTARGET_LINK_EMUL_SUFFIX "_nbsd"

#undef SUBTARGET_LINK_SPEC
#define SUBTARGET_LINK_SPEC NETBSD_LINK_SPEC_ELF

#undef LINK_SPEC
#define LINK_SPEC SH_LINK_SPEC

#define NETBSD_ENTRY_POINT "__start"

/* Provide a CPP_SPEC appropriate for NetBSD.  */
#undef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC NETBSD_CPP_SPEC

#undef TARGET_DEFAULT
#define TARGET_DEFAULT \
  (TARGET_CPU_DEFAULT | USERMODE_BIT | TARGET_ENDIAN_DEFAULT)

/* Define because we use the label and we do not need them. */
#define NO_PROFILE_COUNTERS
 
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(STREAM,LABELNO)				\
do									\
  {									\
    if (TARGET_SHMEDIA32)						\
      {									\
	/* FIXME */							\
	abort ();							\
      }									\
    else if (TARGET_SHMEDIA64)						\
      {									\
	/* FIXME */							\
	abort ();							\
      }									\
    else								\
      {									\
        fprintf((STREAM), "\tmov.l\t%sLP%d,r1\n",			\
                LOCAL_LABEL_PREFIX, (LABELNO));				\
        fprintf((STREAM), "\tmova\t%sLP%dr,r0\n",			\
                LOCAL_LABEL_PREFIX, (LABELNO));				\
        fprintf((STREAM), "\tjmp\t@r1\n");				\
        fprintf((STREAM), "\tnop\n");					\
        fprintf((STREAM), "\t.align\t2\n");				\
        fprintf((STREAM), "%sLP%d:\t.long\t__mcount\n",			\
                LOCAL_LABEL_PREFIX, (LABELNO));				\
        fprintf((STREAM), "%sLP%dr:\n", LOCAL_LABEL_PREFIX, (LABELNO));	\
      }									\
  }									\
while (0)