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, 1998, 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.  */

#include "halfpic.h"
#include "i386/gstabs.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,				\
       N_("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,				\
       N_("Emit ELF object code") },					\
     { "rose",			-MASK_ELF,				\
       N_("Emit ROSE object code") },					\
     { "underscores",		-MASK_NO_UNDERSCORES,			\
       N_("Symbols have a leading underscore") },			\
     { "no-underscores",	 MASK_NO_UNDERSCORES, "" },		\
     { "large-align",		 MASK_LARGE_ALIGN,			\
       N_("Align to >word boundaries") },				\
     { "no-large-align",	-MASK_LARGE_ALIGN, "" },		\
     { "mcount",		-MASK_NO_MCOUNT,			\
       N_("Use mcount for profiling") },				\
     { "mcount-ptr",		 MASK_NO_MCOUNT,			\
       N_("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 "%(cc1_cpu) \
%{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

#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)))

/* 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)					\
      {									\
	const char *const prefix = (TARGET_UNDERSCORES) ? "_" : "";	\
	const char *const 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)			\
	  {								\
	    fprintf (FILE, "\tmovl 4(%%ebp),%%ecx\n");			\
	    fprintf (FILE, "\tpushl %%ecx\n");				\
	    fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n",	\
		     lprefix, labelno);					\
	    fprintf (FILE, "\tmovl _mcount_ptr@GOT(%%ebx),%%eax\n");	\
	    fprintf (FILE, "\tcall *(%%eax)\n");			\
	    fprintf (FILE, "\tpopl %%eax\n");				\
	  }								\
									\
	else if (frame_pointer_needed)					\
	  {								\
	    fprintf (FILE, "\tmovl 4(%%ebp),%%ecx\n");			\
	    fprintf (FILE, "\tpushl %%ecx\n");				\
	    fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno);	\
	    fprintf (FILE, "\tcall *_mcount_ptr\n");			\
	    fprintf (FILE, "\tpopl %%eax\n");				\
	  }								\
									\
	else								\
	  abort ();							\
      }									\
  }									\
while (0)

/* A C function or functions which are needed in the library to
   support block profiling.  When support goes into libc, undo
   the #if 0.  */

#if 0
#undef	BLOCK_PROFILING_CODE
#define	BLOCK_PROFILING_CODE
#endif

/* Prefix for internally generated assembler labels.  If we aren't using
   underscores, we are using prefix `.'s to identify labels that should
   be ignored, as in `i386/gas.h' [e-mail]  */
#undef	LPREFIX
#define	LPREFIX ((TARGET_UNDERSCORES) ? "L" : ".L")

/* This is how to store into the string BUF
   the symbol_ref name of an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.
   This is suitable for output with `assemble_name'.  */

#undef	ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)			\
    sprintf ((BUF), "*%s%s%ld", (TARGET_UNDERSCORES) ? "" : ".",	\
	     (PREFIX), (long)(NUMBER))

/* This is how to output an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.  */

#undef	ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)			\
  fprintf (FILE, "%s%s%d:\n", (TARGET_UNDERSCORES) ? "" : ".",		\
	   PREFIX, NUM)

/* The prefix to add to user-visible assembler symbols.  */

/* target_flags is not accessible by the preprocessor */
#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX "_"

/* This is how to output a reference to a user-level label named NAME.  */

#undef	ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(FILE,NAME)					\
  fprintf (FILE, "%s%s", (TARGET_UNDERSCORES) ? "_" : "", NAME)

/* This is how to output an element of a case-vector that is relative.
   This is only used for PIC code.  See comments by the `casesi' insn in
   i386.md for an explanation of the expression this outputs.  */

#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
  fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)

/* Output a definition */
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
do									\
{									\
    fprintf ((FILE), "%s", SET_ASM_OP);					\
    assemble_name (FILE, LABEL1);					\
    fprintf (FILE, ",");						\
    assemble_name (FILE, LABEL2);					\
    fprintf (FILE, "\n");						\
    }									\
while (0)

/* A C expression to output text to align the location counter in the
   way that is desirable at a point in the code that is reached only
   by jumping.

   This macro need not be defined if you don't want any special
   alignment to be done at such a time.  Most machine descriptions do
   not currently define the macro.  */

#undef	LABEL_ALIGN_AFTER_BARRIER
#define LABEL_ALIGN_AFTER_BARRIER(LABEL) \
  ((!TARGET_LARGE_ALIGN && i386_align_jumps > 2) ? 2 : i386_align_jumps)

/* A C expression to output text to align the location counter in the
   way that is desirable at the beginning of a loop.

   This macro need not be defined if you don't want any special
   alignment to be done at such a time.  Most machine descriptions do
   not currently define the macro.  */

#undef	LOOP_ALIGN
#define LOOP_ALIGN(LABEL) (i386_align_loops)