/* Definitions of target machine for GNU compiler, for HPs running
   HPUX using the 64bit runtime model.
   Copyright (C) 1999, 2000 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 "/opt/langtools/bin"
#endif

/* Under hpux11 the normal location of the various *crt*.o files is the
   /usr/ccs/lib directory.  */

#ifndef CROSS_COMPILE
#undef MD_STARTFILE_PREFIX
#define MD_STARTFILE_PREFIX "/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. */
#if 0
#define INIT_SECTION_ASM_OP	"\t.section\t.init"
#define FINI_SECTION_ASM_OP	"\t.section\t.fini"
#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 *name, *string, *prefix;					\
								\
  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 INT_ASM_OP "\t.dword\t"

/* 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