xref: /openbsd/gnu/gcc/gcc/config/mips/openbsd.h (revision 1107cbef)

/* Configuration file for a mips64 OpenBSD target.
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
   Free Software Foundation, 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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

/* This must agree with <machine/_types.h> */
#undef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"

#undef INTMAX_TYPE
#define INTMAX_TYPE "long long int"

#undef UINTMAX_TYPE
#define UINTMAX_TYPE "long long unsigned int"

#undef WCHAR_TYPE
#define WCHAR_TYPE "int"

#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32

/* If defined, a C expression whose value is a string containing the
   assembler operation to identify the following data as
   uninitialized global data.  If not defined, and neither
   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
   uninitialized global data will be output in the data section if
   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
   used.  */
#define BSS_SECTION_ASM_OP	"\t.section\t.bss"

#define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss

#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME mips_declare_object_name

#undef MD_EXEC_PREFIX
#undef MD_STARTFILE_PREFIX

/* If we don't set MASK_ABICALLS, we can't default to PIC.  */
#undef TARGET_DEFAULT
#define TARGET_DEFAULT MASK_ABICALLS

#define TARGET_OS_CPP_BUILTINS()				\
  do {								\
    OPENBSD_OS_CPP_BUILTINS();					\
								\
    if (TARGET_64BIT)						\
      builtin_define ("__mips64__");				\
								\
    if (TARGET_ABICALLS)					\
      builtin_define ("__ABICALLS__");				\
								\
    if (mips_abi == ABI_EABI)					\
      builtin_define ("__mips_eabi");				\
    else if (mips_abi == ABI_N32)				\
      builtin_define ("__mips_n32");				\
    else if (mips_abi == ABI_64)				\
      builtin_define ("__mips_n64");				\
    else if (mips_abi == ABI_O64)				\
      builtin_define ("__mips_o64");				\
    								\
    if (mips_abi == ABI_N32)					\
      {								\
        builtin_define ("_ABIN32=2");				\
        builtin_define ("_MIPS_SIM=_ABIN32");			\
        builtin_define ("_MIPS_SZLONG=32");			\
        builtin_define ("_MIPS_SZPTR=32");			\
      }								\
    else if (mips_abi == ABI_64)				\
      {								\
        builtin_define ("_ABI64=3");				\
        builtin_define ("_MIPS_SIM=_ABI64");			\
        builtin_define ("_MIPS_SZLONG=64");			\
        builtin_define ("_MIPS_SZPTR=64");			\
      }								\
    else							\
      {								\
	builtin_define ("_ABIO32=1");				\
	builtin_define ("_MIPS_SIM=_ABIO32");			\
        builtin_define ("_MIPS_SZLONG=32");			\
        builtin_define ("_MIPS_SZPTR=32");			\
      }								\
    if (TARGET_FLOAT64)						\
      builtin_define ("_MIPS_FPSET=32");			\
    else							\
      builtin_define ("_MIPS_FPSET=16");			\
    								\
    builtin_define ("_MIPS_SZINT=32");				\
  } while (0)

#undef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC

/* A standard GNU/Linux mapping.  On most targets, it is included in
   CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
   and provides this hook instead.  */
#undef SUBTARGET_CC1_SPEC
#define SUBTARGET_CC1_SPEC "%{profile:-p}"

/* From iris5.h */
/* -G is incompatible with -KPIC which is the default, so only allow objects
   in the small data section if the user explicitly asks for it.  */
#undef MIPS_DEFAULT_GVALUE
#define MIPS_DEFAULT_GVALUE 0

/* Borrowed from sparc/linux.h */
#undef LINK_SPEC
#define LINK_SPEC \
  "%(endian_spec) \
   %{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \
   %{shared:-shared} %{R*} \
   %{static:-Bstatic} \
   %{!static:-Bdynamic} \
   %{rdynamic:-export-dynamic} \
   %{assert*} \
   %{!static:%{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}}"

/* As an elf system, we need crtbegin/crtend stuff.  */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "\
	%{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} \
	%{!p:%{!static:crt0%O%s} %{static:%{nopie:crt0%O%s} \
	%{!nopie:rcrt0%O%s}}}} \
        crtbegin%O%s} %{shared:crtbeginS%O%s}"
#undef ENDFILE_SPEC
#define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"

#undef SUBTARGET_ASM_SPEC
#define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"

/* The MIPS assembler has different syntax for .set. We set it to
   .dummy to trap any errors.  */
#undef SET_ASM_OP
#define SET_ASM_OP "\t.dummy\t"

#undef ASM_OUTPUT_DEF
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do {									\
	fputc ( '\t', FILE);						\
	assemble_name (FILE, LABEL1);					\
	fputs ( " = ", FILE);						\
	assemble_name (FILE, LABEL2);					\
	fputc ( '\n', FILE);						\
 } while (0)

#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)			\
  do {									\
    if (!flag_inhibit_size_directive)					\
      {									\
	fputs ("\t.ent\t", STREAM);					\
	assemble_name (STREAM, NAME);					\
	putc ('\n', STREAM);						\
      }									\
    ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function");		\
    assemble_name (STREAM, NAME);					\
    fputs (":\n", STREAM);						\
  } while (0)

#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)			\
  do {									\
    if (!flag_inhibit_size_directive)					\
      {									\
	fputs ("\t.end\t", STREAM);					\
	assemble_name (STREAM, NAME);					\
	putc ('\n', STREAM);						\
      }									\
  } while (0)

/* Tell function_prologue in mips.c that we have already output the .ent/.end
   pseudo-ops.  */
#undef FUNCTION_NAME_ALREADY_DECLARED
#define FUNCTION_NAME_ALREADY_DECLARED 1

#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX	"."

/* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
   it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
   presence of $gp-relative calls.  */
#undef ASM_OUTPUT_REG_PUSH
#undef ASM_OUTPUT_REG_POP

#undef LIB_SPEC
#define LIB_SPEC OBSD_LIB_SPEC

#undef ENABLE_EXECUTE_STACK

/* Default to -mfix-r4000 -mfix-r4400 when compiling big endian.  */
#undef OVERRIDE_OPTIONS
#define OVERRIDE_OPTIONS						\
  do {									\
    if (TARGET_BIG_ENDIAN)						\
      {									\
	target_flags |= MASK_FIX_R4000 | MASK_FIX_R4400;		\
      }									\
    override_options ();						\
  } while (0)