osfrose.h

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/* Definitions of target machine for GNU compiler.
   Intel 386 (OSF/1 with OSF/rose) version.
   Copyright (C) 1991, 1992, 1993, 1996, 1999 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.  */

#include "halfpic.h"
#include "i386/gstabs.h"

/* Get perform_* macros to build libgcc.a.  */
#include "i386/perform.h"

#define OSF_OS

#undef  WORD_SWITCH_TAKES_ARG
#define WORD_SWITCH_TAKES_ARG(STR)					\
 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) || !strcmp (STR, "pic-names"))

/* This defines which switch letters take arguments.  On svr4, most of
   the normal cases (defined in gcc.c) apply, and we also have -h* and
   -z* options (for the linker).  */

#define SWITCH_TAKES_ARG(CHAR) \
  (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
   || (CHAR) == 'h' \
   || (CHAR) == 'z')

#define MASK_HALF_PIC     	010000000000	/* Mask for half-pic code */
#define MASK_HALF_PIC_DEBUG     004000000000	/* Debug flag */
#define MASK_ELF		002000000000	/* ELF not rose */
#define MASK_NO_UNDERSCORES	000400000000	/* suppress leading _ */
#define MASK_LARGE_ALIGN	000200000000	/* align to >word boundaries */
#define MASK_NO_MCOUNT		000100000000	/* profiling uses mcount_ptr */

#define TARGET_HALF_PIC		(target_flags & MASK_HALF_PIC)
#define TARGET_DEBUG		(target_flags & MASK_HALF_PIC_DEBUG)
#define HALF_PIC_DEBUG		TARGET_DEBUG
#define TARGET_ELF		(target_flags & MASK_ELF)
#define TARGET_ROSE		((target_flags & MASK_ELF) == 0)
#define TARGET_UNDERSCORES	((target_flags & MASK_NO_UNDERSCORES) == 0)
#define TARGET_LARGE_ALIGN	(target_flags & MASK_LARGE_ALIGN)
#define TARGET_MCOUNT		((target_flags & MASK_NO_MCOUNT) == 0)

#undef	SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES						\
     { "half-pic",		 MASK_HALF_PIC, "Emit half-PIC code" },			\
     { "no-half-pic",		-MASK_HALF_PIC, "" }			\
     { "debug-half-pic",	 MASK_HALF_PIC_DEBUG, 0 /* intentionally undoc */ },			\
     { "debugb",		 MASK_HALF_PIC_DEBUG, 0 /* intentionally undoc */ },			\
     { "elf",			 MASK_ELF, "Emit ELF object code" },				\
     { "rose",			-MASK_ELF, "Emit ROSE object code" },				\
     { "underscores",		-MASK_NO_UNDERSCORES, "Symbols have a leading underscore" },			\
     { "no-underscores",	 MASK_NO_UNDERSCORES, "" },			\
     { "large-align",		 MASK_LARGE_ALIGN, "Align to >word boundaries" },			\
     { "no-large-align",	-MASK_LARGE_ALIGN, "" },			\
     { "mcount",		-MASK_NO_MCOUNT, "Use mcount for profiling" },			\
     { "mcount-ptr",		 MASK_NO_MCOUNT, "Use mcount_ptr for profiling" },			\
     { "no-mcount",		 MASK_NO_MCOUNT, "" },

/* OSF/rose uses stabs, not dwarf.  */
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

#ifndef DWARF_DEBUGGING_INFO
#define DWARF_DEBUGGING_INFO	/* enable dwarf debugging for testing */
#endif

/* Handle #pragma weak and #pragma pack.  */

#define HANDLE_SYSV_PRAGMA
#define SUPPORTS_WEAK	TARGET_ELF

/* Change default predefines.  */
#undef	CPP_PREDEFINES
#define CPP_PREDEFINES "-DOSF -DOSF1 -Dunix -Asystem(xpg4)"

#undef  CPP_SPEC
#define CPP_SPEC "%(cpp_cpu) \
%{!melf: -D__ROSE__ %{!pic-none: -D__SHARED__}} \
%{melf: -D__ELF__ %{fpic: -D__SHARED__}} \
%{mno-underscores: -D__NO_UNDERSCORES__} \
%{melf: %{!munderscores: -D__NO_UNDERSCORES__}} \
%{.S:	%{!ansi:%{!traditional:%{!traditional-cpp:%{!ftraditional: -traditional}}}}} \
%{.S:	-D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
%{.cc:	-D__LANGUAGE_C_PLUS_PLUS} \
%{.cxx:	-D__LANGUAGE_C_PLUS_PLUS} \
%{.C:	-D__LANGUAGE_C_PLUS_PLUS} \
%{.m:	-D__LANGUAGE_OBJECTIVE_C} \
%{!.S:	-D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}"

/* Turn on -pic-extern by default for OSF/rose, -fpic for ELF.  */
#undef  CC1_SPEC
#define CC1_SPEC "\
%{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
%{!melf: %{!mrose: -mrose }} \
%{melf: %{!munderscores: %{!mno-underscores: -mno-underscores }} \
	%{!mmcount: %{!mno-mcount: %{!mmcount-ptr: -mmcount-ptr }}}} \
%{!melf: %{!munderscores: %{!mno-underscores: -munderscores }} \
	 %{!mmcount: %{!mno-mcount: %{!mmcount-ptr: -mmcount }}} \
	 %{pic-extern: -mhalf-pic } %{pic-lib: -mhalf-pic } \
	 %{!pic-extern: %{!pic-lib: %{pic-none: -mno-half-pic} %{!pic-none: -mhalf-pic}}} \
	 %{pic-calls: } %{pic-names*: }}"

#undef	ASM_SPEC
#define ASM_SPEC       "%{v*: -v}"

#undef  LINK_SPEC
#define LINK_SPEC      "%{v*: -v} \
%{!melf:	%{!noshrlib: %{pic-none: -noshrlib} %{!pic-none: -warn_nopic}} \
		%{nostdlib} %{noshrlib} %{glue}} \
%{melf:		%{dy} %{dn} %{glue: } \
		%{h*} %{z*} \
		%{static:-dn -Bstatic} \
		%{shared:-G -dy} \
		%{symbolic:-Bsymbolic -G -dy} \
		%{G:-G} \
		%{!dy: %{!dn: %{!static: %{!shared: %{!symbolic: \
			%{noshrlib: -dn } %{pic-none: -dn } \
			%{!noshrlib: %{!pic-none: -dy}}}}}}}}"

#undef  LIB_SPEC
#define LIB_SPEC "-lc"

#undef  LIBG_SPEC
#define LIBG_SPEC ""

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

#undef TARGET_VERSION_INTERNAL
#undef TARGET_VERSION

#define I386_VERSION " 80386, OSF/rose objects"

#define TARGET_VERSION_INTERNAL(STREAM) fputs (I386_VERSION, STREAM)
#define TARGET_VERSION TARGET_VERSION_INTERNAL (stderr)

#undef  MD_EXEC_PREFIX
#define MD_EXEC_PREFIX		"/usr/ccs/gcc/"

#undef  MD_STARTFILE_PREFIX
#define MD_STARTFILE_PREFIX	"/usr/ccs/lib/"

/* Specify size_t, ptrdiff_t, and wchar_t types.  */
#undef	SIZE_TYPE
#undef	PTRDIFF_TYPE
#undef	WCHAR_TYPE
#undef	WCHAR_TYPE_SIZE

#define SIZE_TYPE	"long unsigned int"
#define PTRDIFF_TYPE	"int"
#define WCHAR_TYPE	"unsigned int"
#define WCHAR_TYPE_SIZE BITS_PER_WORD

/* Define this macro if the system header files support C++ as well
   as C.  This macro inhibits the usual method of using system header
   files in C++, which is to pretend that the file's contents are
   enclosed in `extern "C" {...}'. */
#define NO_IMPLICIT_EXTERN_C

/* Turn off long double being 96 bits.  */
#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64

/* This macro generates the assembly code for function entry.
   FILE is a stdio stream to output the code to.
   SIZE is an int: how many units of temporary storage to allocate.
   Refer to the array `regs_ever_live' to determine which registers
   to save; `regs_ever_live[I]' is nonzero if register number I
   is ever used in the function.  This macro is responsible for
   knowing which registers should not be saved even if used.

   We override it here to allow for the new profiling code to go before
   the prologue and the old mcount code to go after the prologue (and
   after %ebx has been set up for ELF shared library support).  */

#define OSF_PROFILE_BEFORE_PROLOGUE					\
  (!TARGET_MCOUNT							\
   && !current_function_needs_context					\
   && (!flag_pic							\
       || !frame_pointer_needed						\
       || (!current_function_uses_pic_offset_table			\
	   && !current_function_uses_const_pool)))

#undef	FUNCTION_PROLOGUE
#define FUNCTION_PROLOGUE(FILE, SIZE)					\
do									\
  {									\
    char *prefix = (TARGET_UNDERSCORES) ? "_" : "";			\
    char *lprefix = LPREFIX;						\
    int labelno = profile_label_no;					\
									\
    if (profile_flag && OSF_PROFILE_BEFORE_PROLOGUE)			\
      {									\
	if (!flag_pic && !HALF_PIC_P ())				\
	  {								\
	    fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno);	\
	    fprintf (FILE, "\tcall *%s_mcount_ptr\n", prefix);		\
	  }								\
									\
	else if (HALF_PIC_P ())						\
	  {								\
	    rtx symref;							\
									\
	    HALF_PIC_EXTERNAL ("_mcount_ptr");				\
	    symref = HALF_PIC_PTR (gen_rtx (SYMBOL_REF, Pmode,		\
					    "_mcount_ptr"));		\
									\
	    fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno);	\
	    fprintf (FILE, "\tmovl %s%s,%%eax\n", prefix,		\
		     XSTR (symref, 0));					\
	    fprintf (FILE, "\tcall *(%%eax)\n");			\
	  }								\
									\
	else								\
	  {								\
	    static int call_no = 0;					\
									\
	    fprintf (FILE, "\tcall %sPc%d\n", lprefix, call_no);	\
	    fprintf (FILE, "%sPc%d:\tpopl %%eax\n", lprefix, call_no);	\
	    fprintf (FILE, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-%sPc%d],%%eax\n", \
		     lprefix, call_no++);				\
	    fprintf (FILE, "\tleal %sP%d@GOTOFF(%%eax),%%edx\n",	\
		     lprefix, labelno);					\
	    fprintf (FILE, "\tmovl %s_mcount_ptr@GOT(%%eax),%%eax\n",	\
		     prefix);						\
	    fprintf (FILE, "\tcall *(%%eax)\n");			\
	  }								\
      }									\
									\
    function_prologue (FILE, SIZE);					\
  }									\
while (0)

/* A C statement or compound statement to output to FILE some assembler code to
   call the profiling subroutine `mcount'.  Before calling, the assembler code
   must load the address of a counter variable into a register where `mcount'
   expects to find the address.  The name of this variable is `LP' followed by
   the number LABELNO, so you would generate the name using `LP%d' in a
   `fprintf'.

   The details of how the address should be passed to `mcount' are determined
   by your operating system environment, not by GNU CC.  To figure them out,
   compile a small program for profiling using the system's installed C
   compiler and look at the assembler code that results. */

#undef  FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO)				\
do									\
  {									\
    if (!OSF_PROFILE_BEFORE_PROLOGUE)					\
      {									\
	char *prefix = (TARGET_UNDERSCORES) ? "_" : "";			\
	char *lprefix = LPREFIX;					\
	int labelno = LABELNO;						\
									\
	/* Note that OSF/rose blew it in terms of calling mcount,	\
	   since OSF/rose prepends a leading underscore, but mcount's	\
	   doesn't.  At present, we keep this kludge for ELF as well	\
	   to allow old kernels to build profiling.  */			\
									\
	if (flag_pic							\
	    && !current_function_uses_pic_offset_table			\
	    && !current_function_uses_const_pool)			\
	  abort ();							\
									\
	if (TARGET_MCOUNT && flag_pic)					\
	  {								\
	    fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n",	\
		     lprefix, labelno);					\
	    fprintf (FILE, "\tcall *%smcount@GOT(%%ebx)\n", prefix);	\
	  }								\
									\
	else if (TARGET_MCOUNT && HALF_PIC_P ())			\
	  {								\
	    rtx symdef;							\
									\
	    HALF_PIC_EXTERNAL ("mcount");				\
	    symdef = HALF_PIC_PTR (gen_rtx (SYMBOL_REF, Pmode, "mcount")); \
	    fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno);	\
	    fprintf (FILE, "\tcall *%s%s\n", prefix, XSTR (symdef, 0));	\
	  }								\
									\
	else if (TARGET_MCOUNT)						\
	  {								\
	    fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno);	\
	    fprintf (FILE, "\tcall %smcount\n", prefix);		\
	  }								\
									\
	else if (flag_pic && frame_pointer_needed)			\
	  {								\