gcc/config/alpha/alpha-interix.h - gcc - Git at Google

 /* Definitions of target machine for GNU compiler, for DEC Alpha
    running Windows/NT.
    Copyright (C) 1995, 1996, 1999, 2000 Free Software Foundation, Inc.

    Donn Terry, Softway Systems, Inc.
    From code
        Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)

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

 /* cpp handles __STDC__ */
 /* The three "Alpha" defines on the first such line are from the CLAXP spec */
 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES " \
   -D__INTERIX \
   -D__OPENNT \
   -D__Alpha_AXP -D_M_ALPHA -D_ALPHA_  \
   -D__alpha -D__alpha__\
   -D__stdcall= \
   -D__cdecl= \
   -Asystem=unix -Asystem=interix -Acpu=alpha -Amachine=alpha"

 #undef CPP_SUBTARGET_SPEC
 #define CPP_SUBTARGET_SPEC "\
 -remap \
 %{posix:-D_POSIX_SOURCE} \
 -isystem %$INTERIX_ROOT/usr/include"

 #undef TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (alpha Interix)");

 /* alpha.h sets this, but it doesn't apply to us */
 #undef OBJECT_FORMAT_ECOFF
 #undef OBJECT_FORMAT_COFF

 /* LINK_SPEC */

 /* MD_STARTFILE_PREFIX */

 /* ASM_OUTPUT_LOOP_ALIGN; ASM_OUTPUT_ALIGN_CODE */

 /* Codegen macro overrides for NT internal conventions */

 /* the below are ecoff specific... we don't need them, so
    undef them (they'll get a default later) */

 #undef PUT_SDB_BLOCK_START
 #undef PUT_SDB_BLOCK_END

 /* The following are needed for C++, but also needed for profiling */

 /* Support const sections and the ctors and dtors sections for g++.
    Note that there appears to be two different ways to support const
    sections at the moment.  You can either #define the symbol
    READONLY_DATA_SECTION (giving it some code which switches to the
    readonly data section) or else you can #define the symbols
    EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
    SELECT_RTX_SECTION.  We do both here just to be on the safe side.  */

 #define USE_CONST_SECTION	1

 #define CONST_SECTION_ASM_OP	"\t.rdata"

 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.

    Note that we want to give these sections the SHF_WRITE attribute
    because these sections will actually contain data (i.e. tables of
    addresses of functions in the current root executable or shared library
    file) and, in the case of a shared library, the relocatable addresses
    will have to be properly resolved/relocated (and then written into) by
    the dynamic linker when it actually attaches the given shared library
    to the executing process.  (Note that on SVR4, you may wish to use the
    `-z text' option to the ELF linker, when building a shared library, as
    an additional check that you are doing everything right.  But if you do
    use the `-z text' option when building a shared library, you will get
    errors unless the .ctors and .dtors sections are marked as writable
    via the SHF_WRITE attribute.)  */

 #define CTORS_SECTION_ASM_OP	"\t.ctors"
 #define DTORS_SECTION_ASM_OP	"\t.dtors"

 /* A default list of other sections which we might be "in" at any given
    time.  For targets that use additional sections (e.g. .tdesc) you
    should override this definition in the target-specific file which
    includes this file.  */

 #undef EXTRA_SECTIONS
 #define EXTRA_SECTIONS in_const

 /* A default list of extra section function definitions.  For targets
    that use additional sections (e.g. .tdesc) you should override this
    definition in the target-specific file which includes this file.  */

 #undef EXTRA_SECTION_FUNCTIONS
 #define EXTRA_SECTION_FUNCTIONS						\
   CONST_SECTION_FUNCTION

 #undef READONLY_DATA_SECTION
 #define READONLY_DATA_SECTION() const_section ()

 #define CONST_SECTION_FUNCTION						\
 void									\
 const_section ()							\
 {									\
   if (!USE_CONST_SECTION)						\
     text_section();							\
   else if (in_section != in_const)					\
     {									\
       fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP);		\
       in_section = in_const;						\
     }									\
 }

 /* The linker will take care of this, and having them causes problems with
    ld -r (specifically -rU).  */
 #define CTOR_LISTS_DEFINED_EXTERNALLY 1

 #define SET_ASM_OP	"\t.set\t"
 /* Output a definition (implements alias) */
 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do									\
 {									\
     fprintf ((FILE), "\t");						\
     assemble_name (FILE, LABEL1);					\
     fprintf (FILE, "=");						\
     assemble_name (FILE, LABEL2);					\
     fprintf (FILE, "\n");						\
     }									\
 while (0)

 /* We use the defaults, so undef the null definitions */
 #undef PUT_SDB_FUNCTION_START
 #undef PUT_SDB_FUNCTION_END
 #undef PUT_SDB_EPILOGUE_END

 #define HOST_PTR_PRINTF "%p"
 #define HOST_PTR_AS_INT unsigned long

 #define PCC_BITFIELD_TYPE_MATTERS 1
 #define PCC_BITFIELD_TYPE_TEST TYPE_NATIVE(rec)
 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)

 /* DWARF2 Unwinding doesn't work with exception handling yet.  */
 #undef DWARF2_UNWIND_INFO
 #define DWARF2_UNWIND_INFO 0

 /* Don't assume anything about the header files.  */
 #define NO_IMPLICIT_EXTERN_C

 /* The definition of this macro implies that there are cases where
    a scalar value cannot be returned in registers.

    On NT (according to the spec) anything except strings/array that fits
    in 64 bits is returned in the registers (this appears to differ from
    the rest of the Alpha family).  */

 #undef RETURN_IN_MEMORY
 #define RETURN_IN_MEMORY(TYPE) \
   (TREE_CODE (TYPE) == ARRAY_TYPE || int_size_in_bytes(TYPE) > 8)

 #define ASM_LOAD_ADDR(loc, reg)   "     lda " #reg "," #loc "\n"

 #undef ASM_FILE_START
 #define ASM_FILE_START(FILE)					\
 {								\
   alpha_write_verstamp (FILE);					\
   fprintf (FILE, "\t.set noreorder\n");				\
   fprintf (FILE, "\t.set volatile\n");                          \
   fprintf (FILE, "\t.set noat\n");				\
   fprintf (FILE, "\t.globl\t__fltused\n");			\
   ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename);	\
 }

 /* The current Interix assembler (consistent with the DEC documentation)
    uses a=b NOT .set a,b; .set is for assembler options.  */
 #undef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO)    	\
  do {									\
   assemble_name (FILE, SY);						\
   fputc ('=', FILE);							\
   assemble_name (FILE, HI);						\
   fputc ('-', FILE);							\
   assemble_name (FILE, LO);						\
  } while (0)
	/* Definitions of target machine for GNU compiler, for DEC Alpha
	running Windows/NT.
	Copyright (C) 1995, 1996, 1999, 2000 Free Software Foundation, Inc.

	Donn Terry, Softway Systems, Inc.
	From code
	Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)

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

	/* cpp handles __STDC__ */
	/* The three "Alpha" defines on the first such line are from the CLAXP spec */
	#undef CPP_PREDEFINES
	#define CPP_PREDEFINES " \
	-D__INTERIX \
	-D__OPENNT \
	-D__Alpha_AXP -D_M_ALPHA -D_ALPHA_ \
	-D__alpha -D__alpha__\
	-D__stdcall= \
	-D__cdecl= \
	-Asystem=unix -Asystem=interix -Acpu=alpha -Amachine=alpha"

	#undef CPP_SUBTARGET_SPEC
	#define CPP_SUBTARGET_SPEC "\
	-remap \
	%{posix:-D_POSIX_SOURCE} \
	-isystem %$INTERIX_ROOT/usr/include"

	#undef TARGET_VERSION
	#define TARGET_VERSION fprintf (stderr, " (alpha Interix)");

	/* alpha.h sets this, but it doesn't apply to us */
	#undef OBJECT_FORMAT_ECOFF
	#undef OBJECT_FORMAT_COFF

	/* LINK_SPEC */

	/* MD_STARTFILE_PREFIX */

	/* ASM_OUTPUT_LOOP_ALIGN; ASM_OUTPUT_ALIGN_CODE */

	/* Codegen macro overrides for NT internal conventions */

	/* the below are ecoff specific... we don't need them, so
	undef them (they'll get a default later) */

	#undef PUT_SDB_BLOCK_START
	#undef PUT_SDB_BLOCK_END

	/* The following are needed for C++, but also needed for profiling */

	/* Support const sections and the ctors and dtors sections for g++.
	Note that there appears to be two different ways to support const
	sections at the moment. You can either #define the symbol
	READONLY_DATA_SECTION (giving it some code which switches to the
	readonly data section) or else you can #define the symbols
	EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
	SELECT_RTX_SECTION. We do both here just to be on the safe side. */

	#define USE_CONST_SECTION 1

	#define CONST_SECTION_ASM_OP "\t.rdata"

	/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.

	Note that we want to give these sections the SHF_WRITE attribute
	because these sections will actually contain data (i.e. tables of
	addresses of functions in the current root executable or shared library
	file) and, in the case of a shared library, the relocatable addresses
	will have to be properly resolved/relocated (and then written into) by
	the dynamic linker when it actually attaches the given shared library
	to the executing process. (Note that on SVR4, you may wish to use the
	`-z text' option to the ELF linker, when building a shared library, as
	an additional check that you are doing everything right. But if you do
	use the `-z text' option when building a shared library, you will get
	errors unless the .ctors and .dtors sections are marked as writable
	via the SHF_WRITE attribute.) */

	#define CTORS_SECTION_ASM_OP "\t.ctors"
	#define DTORS_SECTION_ASM_OP "\t.dtors"

	/* A default list of other sections which we might be "in" at any given
	time. For targets that use additional sections (e.g. .tdesc) you
	should override this definition in the target-specific file which
	includes this file. */

	#undef EXTRA_SECTIONS
	#define EXTRA_SECTIONS in_const

	/* A default list of extra section function definitions. For targets
	that use additional sections (e.g. .tdesc) you should override this
	definition in the target-specific file which includes this file. */

	#undef EXTRA_SECTION_FUNCTIONS
	#define EXTRA_SECTION_FUNCTIONS \
	CONST_SECTION_FUNCTION

	#undef READONLY_DATA_SECTION
	#define READONLY_DATA_SECTION() const_section ()

	#define CONST_SECTION_FUNCTION \
	void \
	const_section () \
	{ \
	if (!USE_CONST_SECTION) \
	text_section(); \
	else if (in_section != in_const) \
	{ \
	fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
	in_section = in_const; \
	} \
	}

	/* The linker will take care of this, and having them causes problems with
	ld -r (specifically -rU). */
	#define CTOR_LISTS_DEFINED_EXTERNALLY 1

	#define SET_ASM_OP "\t.set\t"
	/* Output a definition (implements alias) */
	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
	do \
	{ \
	fprintf ((FILE), "\t"); \
	assemble_name (FILE, LABEL1); \
	fprintf (FILE, "="); \
	assemble_name (FILE, LABEL2); \
	fprintf (FILE, "\n"); \
	} \
	while (0)

	/* We use the defaults, so undef the null definitions */
	#undef PUT_SDB_FUNCTION_START
	#undef PUT_SDB_FUNCTION_END
	#undef PUT_SDB_EPILOGUE_END

	#define HOST_PTR_PRINTF "%p"
	#define HOST_PTR_AS_INT unsigned long

	#define PCC_BITFIELD_TYPE_MATTERS 1
	#define PCC_BITFIELD_TYPE_TEST TYPE_NATIVE(rec)
	#define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)

	/* DWARF2 Unwinding doesn't work with exception handling yet. */
	#undef DWARF2_UNWIND_INFO
	#define DWARF2_UNWIND_INFO 0

	/* Don't assume anything about the header files. */
	#define NO_IMPLICIT_EXTERN_C

	/* The definition of this macro implies that there are cases where
	a scalar value cannot be returned in registers.

	On NT (according to the spec) anything except strings/array that fits
	in 64 bits is returned in the registers (this appears to differ from
	the rest of the Alpha family). */

	#undef RETURN_IN_MEMORY
	#define RETURN_IN_MEMORY(TYPE) \
	(TREE_CODE (TYPE) == ARRAY_TYPE \|\| int_size_in_bytes(TYPE) > 8)

	#define ASM_LOAD_ADDR(loc, reg) " lda " #reg "," #loc "\n"

	#undef ASM_FILE_START
	#define ASM_FILE_START(FILE) \
	{ \
	alpha_write_verstamp (FILE); \
	fprintf (FILE, "\t.set noreorder\n"); \
	fprintf (FILE, "\t.set volatile\n"); \
	fprintf (FILE, "\t.set noat\n"); \
	fprintf (FILE, "\t.globl\t__fltused\n"); \
	ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename); \
	}

	/* The current Interix assembler (consistent with the DEC documentation)
	uses a=b NOT .set a,b; .set is for assembler options. */
	#undef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
	#define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
	do { \
	assemble_name (FILE, SY); \
	fputc ('=', FILE); \
	assemble_name (FILE, HI); \
	fputc ('-', FILE); \
	assemble_name (FILE, LO); \
	} while (0)