gcc/config/pa/pa64-hpux.h - gcc - Git at Google

 /* Definitions of target machine for GNU compiler, for HPs running
    HPUX using the 64bit runtime model.
    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, 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 GNU CC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */

 /* We can debug dynamically linked executables on hpux11; we also
    want dereferencing of a NULL pointer to cause a SEGV.  */
 #undef LINK_SPEC
 #define LINK_SPEC \
   "-E %{mlinker-opt:-O} %{!shared:-u main} %{static:-a archive} %{shared:-shared}"

 /* Like the default, except no -lg.  */
 #undef LIB_SPEC
 #define LIB_SPEC \
   "%{!shared:\
      %{!p:\
        %{!pg:\
          %{!threads:-lc}\
          %{threads:-lcma -lc_r}}\
        %{p: -L/lib/libp/ -lc}\
        %{pg: -L/lib/libp/ -lc}}} /usr/lib/pa20_64/milli.a"

 /* Under hpux11, the normal location of the `ld' and `as' programs is the
    /usr/ccs/bin directory.  */

 #ifndef CROSS_COMPILE
 #undef MD_EXEC_PREFIX
 #define MD_EXEC_PREFIX "/usr/ccs/bin"
 #endif

 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
    is the /usr/ccs/lib/pa20_64 directory.  Some files may also be in the
    /opt/langtools/lib/pa20_64 directory.  */

 #ifndef CROSS_COMPILE
 #undef MD_STARTFILE_PREFIX
 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
 #endif

 #ifndef CROSS_COMPILE
 #undef MD_STARTFILE_PREFIX_1
 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
 #endif

 /* hpux11 has the new HP assembler.  It's still lousy, but it's a whole lot
    better than the assembler shipped with older versions of hpux.  */
 #undef NEW_HP_ASSEMBLER
 #define NEW_HP_ASSEMBLER 1

 #undef ASM_FILE_START
 #define ASM_FILE_START(FILE) \
 do {  \
      if (TARGET_64BIT) \
        fputs("\t.LEVEL 2.0w\n", FILE); \
      else if (TARGET_PA_20) \
        fputs("\t.LEVEL 2.0\n", FILE); \
      else if (TARGET_PA_11) \
        fputs("\t.LEVEL 1.1\n", FILE); \
      else \
        fputs("\t.LEVEL 1.0\n", FILE); \
      if (profile_flag)\
        fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
      if (write_symbols != NO_DEBUG) \
        output_file_directive ((FILE), main_input_filename); \
    } while (0)

 /* It looks like DWARF2 will be the easiest debug format to handle on this
    platform.  */
 #define OBJECT_FORMAT_ELF
 #define DWARF2_DEBUGGING_INFO
 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 /* This isn't quite ready yet.  I'm seeing it mess up some line
    tables.  For example, we're getting lines starting/ending at
    impossible addresses.  */
 #define DWARF2_ASM_LINE_DEBUG_INFO 1


 /* The rest of this file is copied from the generic svr4.h.  One day we
    would like to simply include svr4.h instead of copying all these
    definitions.  */

 /* 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.section\t.rodata"

 /* On svr4, we *do* have support for the .init and .fini sections, and we
    can put stuff in there to be executed before and after `main'.  We let
    crtstuff.c and other files know this by defining the following symbols.
    The definitions say how to change sections to the .init and .fini
    sections.  This is the same for all known svr4 assemblers.  */

 /* For the time being, we aren't using init sections.  `P' relocations
    are currently used for function references.  However, P relocations are
    treated as data references and data references are bound by dld.sl
    immediately at program startup.  This causes an abort due to undefined
    weak symbols in crtbegin.o (e.g., __register_frame_info).  Possibly
    Q relocations might avoid this problem but the GNU assembler doesn't
    support them.  */
 #if 0
 #define INIT_SECTION_ASM_OP	"\t.section\t.init"
 #define FINI_SECTION_ASM_OP	"\t.section\t.fini"
 #else
 #define EH_FRAME_IN_DATA_SECTION 1

 #undef ENDFILE_SPEC
 #define ENDFILE_SPEC ""

 #undef STARTFILE_SPEC
 #define STARTFILE_SPEC "%{!shared: \
 			 %{!symbolic: \
 			  %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}"
 #endif

 /* 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


 #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;						\
     }									\
 }

 /* Switch into a generic section.  */
 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section

 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 #define UNIQUE_SECTION(DECL,RELOC)				\
 do {								\
   int len;							\
   char *string;							\
   const char *prefix,						\
     *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));\
 								\
   if (! DECL_ONE_ONLY (DECL))					\
     {								\
       prefix = ".";                                             \
       if (TREE_CODE (DECL) == FUNCTION_DECL)			\
 	prefix = ".text.";					\
       else if (DECL_READONLY_SECTION (DECL, RELOC))		\
 	prefix = ".rodata.";					\
       else							\
 	prefix = ".data.";					\
     }								\
   else if (TREE_CODE (DECL) == FUNCTION_DECL)			\
     prefix = ".gnu.linkonce.t.";				\
   else if (DECL_READONLY_SECTION (DECL, RELOC))			\
     prefix = ".gnu.linkonce.r.";				\
   else								\
     prefix = ".gnu.linkonce.d.";				\
 								\
   len = strlen (name) + strlen (prefix);			\
   string = alloca (len + 1);					\
   sprintf (string, "%s%s", prefix, name);			\
 								\
   DECL_SECTION_NAME (DECL) = build_string (len, string);	\
 } while (0)

 /* Define the strings used for the special svr4 .type and .size directives.
    These strings generally do not vary from one system running svr4 to
    another, but if a given system (e.g. m88k running svr) needs to use
    different pseudo-op names for these, they may be overridden in the
    file which includes this one.  */

 #define TYPE_ASM_OP	"\t.type\t"
 #define SIZE_ASM_OP	"\t.size\t"

 /* This is how we tell the assembler that a symbol is weak.  */

 #define ASM_WEAKEN_LABEL(FILE,NAME) \
   do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
        fputc ('\n', FILE); } while (0)

 /* The following macro defines the format used to output the second
    operand of the .type assembler directive.  Different svr4 assemblers
    expect various different forms for this operand.  The one given here
    is just a default.  You may need to override it in your machine-
    specific tm.h file (depending upon the particulars of your assembler).  */

 #define TYPE_OPERAND_FMT	"@%s"

 /* Write the extra assembler code needed to declare a function's result.
    Most svr4 assemblers don't require any special declaration of the
    result value, but there are exceptions.  */

 #ifndef ASM_DECLARE_RESULT
 #define ASM_DECLARE_RESULT(FILE, RESULT)
 #endif
	/* Definitions of target machine for GNU compiler, for HPs running
	HPUX using the 64bit runtime model.
	Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, 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 GNU CC; see the file COPYING. If not, write to
	the Free Software Foundation, 59 Temple Place - Suite 330,
	Boston, MA 02111-1307, USA. */

	/* We can debug dynamically linked executables on hpux11; we also
	want dereferencing of a NULL pointer to cause a SEGV. */
	#undef LINK_SPEC
	#define LINK_SPEC \
	"-E %{mlinker-opt:-O} %{!shared:-u main} %{static:-a archive} %{shared:-shared}"

	/* Like the default, except no -lg. */
	#undef LIB_SPEC
	#define LIB_SPEC \
	"%{!shared:\
	%{!p:\
	%{!pg:\
	%{!threads:-lc}\
	%{threads:-lcma -lc_r}}\
	%{p: -L/lib/libp/ -lc}\
	%{pg: -L/lib/libp/ -lc}}} /usr/lib/pa20_64/milli.a"

	/* Under hpux11, the normal location of the `ld' and `as' programs is the
	/usr/ccs/bin directory. */

	#ifndef CROSS_COMPILE
	#undef MD_EXEC_PREFIX
	#define MD_EXEC_PREFIX "/usr/ccs/bin"
	#endif

	/* Under hpux11 the normal location of the various pa20_64 crt.o files
	is the /usr/ccs/lib/pa20_64 directory. Some files may also be in the
	/opt/langtools/lib/pa20_64 directory. */

	#ifndef CROSS_COMPILE
	#undef MD_STARTFILE_PREFIX
	#define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
	#endif

	#ifndef CROSS_COMPILE
	#undef MD_STARTFILE_PREFIX_1
	#define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
	#endif

	/* hpux11 has the new HP assembler. It's still lousy, but it's a whole lot
	better than the assembler shipped with older versions of hpux. */
	#undef NEW_HP_ASSEMBLER
	#define NEW_HP_ASSEMBLER 1

	#undef ASM_FILE_START
	#define ASM_FILE_START(FILE) \
	do { \
	if (TARGET_64BIT) \
	fputs("\t.LEVEL 2.0w\n", FILE); \
	else if (TARGET_PA_20) \
	fputs("\t.LEVEL 2.0\n", FILE); \
	else if (TARGET_PA_11) \
	fputs("\t.LEVEL 1.1\n", FILE); \
	else \
	fputs("\t.LEVEL 1.0\n", FILE); \
	if (profile_flag)\
	fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
	if (write_symbols != NO_DEBUG) \
	output_file_directive ((FILE), main_input_filename); \
	} while (0)

	/* It looks like DWARF2 will be the easiest debug format to handle on this
	platform. */
	#define OBJECT_FORMAT_ELF
	#define DWARF2_DEBUGGING_INFO
	#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
	/* This isn't quite ready yet. I'm seeing it mess up some line
	tables. For example, we're getting lines starting/ending at
	impossible addresses. */
	#define DWARF2_ASM_LINE_DEBUG_INFO 1


	/* The rest of this file is copied from the generic svr4.h. One day we
	would like to simply include svr4.h instead of copying all these
	definitions. */

	/* 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.section\t.rodata"

	/* On svr4, we do have support for the .init and .fini sections, and we
	can put stuff in there to be executed before and after `main'. We let
	crtstuff.c and other files know this by defining the following symbols.
	The definitions say how to change sections to the .init and .fini
	sections. This is the same for all known svr4 assemblers. */

	/* For the time being, we aren't using init sections. `P' relocations
	are currently used for function references. However, P relocations are
	treated as data references and data references are bound by dld.sl
	immediately at program startup. This causes an abort due to undefined
	weak symbols in crtbegin.o (e.g., __register_frame_info). Possibly
	Q relocations might avoid this problem but the GNU assembler doesn't
	support them. */
	#if 0
	#define INIT_SECTION_ASM_OP "\t.section\t.init"
	#define FINI_SECTION_ASM_OP "\t.section\t.fini"
	#else
	#define EH_FRAME_IN_DATA_SECTION 1

	#undef ENDFILE_SPEC
	#define ENDFILE_SPEC ""

	#undef STARTFILE_SPEC
	#define STARTFILE_SPEC "%{!shared: \
	%{!symbolic: \
	%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}"
	#endif

	/* 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


	#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; \
	} \
	}

	/* Switch into a generic section. */
	#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section

	#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
	#define UNIQUE_SECTION(DECL,RELOC) \
	do { \
	int len; \
	char *string; \
	const char *prefix, \
	*const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));\
	\
	if (! DECL_ONE_ONLY (DECL)) \
	{ \
	prefix = "."; \
	if (TREE_CODE (DECL) == FUNCTION_DECL) \
	prefix = ".text."; \
	else if (DECL_READONLY_SECTION (DECL, RELOC)) \
	prefix = ".rodata."; \
	else \
	prefix = ".data."; \
	} \
	else if (TREE_CODE (DECL) == FUNCTION_DECL) \
	prefix = ".gnu.linkonce.t."; \
	else if (DECL_READONLY_SECTION (DECL, RELOC)) \
	prefix = ".gnu.linkonce.r."; \
	else \
	prefix = ".gnu.linkonce.d."; \
	\
	len = strlen (name) + strlen (prefix); \
	string = alloca (len + 1); \
	sprintf (string, "%s%s", prefix, name); \
	\
	DECL_SECTION_NAME (DECL) = build_string (len, string); \
	} while (0)

	/* Define the strings used for the special svr4 .type and .size directives.
	These strings generally do not vary from one system running svr4 to
	another, but if a given system (e.g. m88k running svr) needs to use
	different pseudo-op names for these, they may be overridden in the
	file which includes this one. */

	#define TYPE_ASM_OP "\t.type\t"
	#define SIZE_ASM_OP "\t.size\t"

	/* This is how we tell the assembler that a symbol is weak. */

	#define ASM_WEAKEN_LABEL(FILE,NAME) \
	do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
	fputc ('\n', FILE); } while (0)

	/* The following macro defines the format used to output the second
	operand of the .type assembler directive. Different svr4 assemblers
	expect various different forms for this operand. The one given here
	is just a default. You may need to override it in your machine-
	specific tm.h file (depending upon the particulars of your assembler). */

	#define TYPE_OPERAND_FMT "@%s"

	/* Write the extra assembler code needed to declare a function's result.
	Most svr4 assemblers don't require any special declaration of the
	result value, but there are exceptions. */

	#ifndef ASM_DECLARE_RESULT
	#define ASM_DECLARE_RESULT(FILE, RESULT)
	#endif