[thirdparty/gcc.git] / gcc / defaults.h

/* Definitions of various defaults for how to do assembler output
   (most of which are designed to be appropriate for GAS or for
   some BSD assembler).
   Copyright (C) 1992, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   Contributed by Ron Guilmette (rfg@monkeys.com)

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.  */

/* Store in OUTPUT a string (made with alloca) containing
   an assembler-name for a local static variable or function named NAME.
   LABELNO is an integer which is different for each call.  */

#ifndef ASM_FORMAT_PRIVATE_NAME
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)			\
  do {									\
    int len = strlen (NAME);						\
    char *temp = (char *) alloca (len + 3);				\
    temp[0] = 'L';							\
    strcpy (&temp[1], (NAME));						\
    temp[len + 1] = '.';						\
    temp[len + 2] = 0;							\
    (OUTPUT) = (char *) alloca (strlen (NAME) + 11);			\
    ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);		\
  } while (0)
#endif

#ifndef ASM_STABD_OP
#define ASM_STABD_OP ".stabd"
#endif

/* This is how to output an element of a case-vector that is absolute.
   Some targets don't use this, but we have to define it anyway.  */

#ifndef ASM_OUTPUT_ADDR_VEC_ELT
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
do { fprintf (FILE, "\t%s\t", ASM_LONG);				\
     ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));			\
     fputc ('\n', FILE);						\
   } while (0)
#endif

/* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME.  */
#ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
#define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
#endif

/* choose a reasonable default for ASM_OUTPUT_ASCII.  */

#ifndef ASM_OUTPUT_ASCII
#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  do {									      \
    FILE *_hide_asm_out_file = (MYFILE);				      \
    const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);	      \
    int _hide_thissize = (MYLENGTH);					      \
    {									      \
      FILE *asm_out_file = _hide_asm_out_file;				      \
      const unsigned char *p = _hide_p;					      \
      int thissize = _hide_thissize;					      \
      int i;								      \
      fprintf (asm_out_file, "\t.ascii \"");				      \
									      \
      for (i = 0; i < thissize; i++)					      \
	{								      \
	  register int c = p[i];					      \
	  if (c == '\"' || c == '\\')					      \
	    putc ('\\', asm_out_file);					      \
	  if (ISPRINT(c))						      \
	    putc (c, asm_out_file);					      \
	  else								      \
	    {								      \
	      fprintf (asm_out_file, "\\%o", c);			      \
	      /* After an octal-escape, if a digit follows,		      \
		 terminate one string constant and start another.	      \
		 The Vax assembler fails to stop reading the escape	      \
		 after three digits, so this is the only way we		      \
		 can get it to parse the data properly.  */		      \
	      if (i < thissize - 1 && ISDIGIT(p[i + 1]))		      \
		fprintf (asm_out_file, "\"\n\t.ascii \"");		      \
	  }								      \
	}								      \
      fprintf (asm_out_file, "\"\n");					      \
    }									      \
  }									      \
  while (0)
#endif

#ifndef ASM_IDENTIFY_GCC
  /* Default the definition, only if ASM_IDENTIFY_GCC is not set,
     because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
     outputting labels, if we do want it to, then it must be defined
     in the tm.h file.  */
#ifndef ASM_IDENTIFY_LANGUAGE
#define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
#endif
#endif

/* This is how we tell the assembler to equate two values.  */
#ifdef SET_ASM_OP
#ifndef ASM_OUTPUT_DEF
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do {	fprintf ((FILE), "\t%s\t", SET_ASM_OP);				\
	assemble_name (FILE, LABEL1);					\
	fprintf (FILE, ",");						\
	assemble_name (FILE, LABEL2);					\
	fprintf (FILE, "\n");						\
  } while (0)
#endif
#endif

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

#ifndef ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
#endif

/* This determines whether or not we support weak symbols.  */
#ifndef SUPPORTS_WEAK
#ifdef ASM_WEAKEN_LABEL
#define SUPPORTS_WEAK 1
#else
#define SUPPORTS_WEAK 0
#endif
#endif

/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
   provide a weak attribute.  Else define it to nothing. 

   This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
   not available at that time.

   Note, this is only for use by target files which we know are to be
   compiled by GCC.  */
#ifndef TARGET_ATTRIBUTE_WEAK
# if SUPPORTS_WEAK
#  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
# else
#  define TARGET_ATTRIBUTE_WEAK
# endif
#endif

/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
   the rest of the DWARF 2 frame unwind support is also provided.  */
#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
#define DWARF2_UNWIND_INFO 1
#endif

#if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
# if defined (EH_FRAME_SECTION_ASM_OP)
#  define EH_FRAME_SECTION() eh_frame_section();
# else
   /* If we aren't using crtstuff to run ctors, don't use it for EH.  */
#  if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
#   define EH_FRAME_SECTION_ASM_OP	".section\t.eh_frame,\"aw\""
#   define EH_FRAME_SECTION() \
     do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
#  endif
# endif
#endif

/* By default, we generate a label at the beginning and end of the
   text section, and compute the size of the text section by
   subtracting the two.  However, on some platforms that doesn't 
   work, and we use the section itself, rather than a label at the
   beginning of it, to indicate the start of the section.  On such
   platforms, define this to zero.  */
#ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
#define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
#endif

/* Supply a default definition for PROMOTE_PROTOTYPES.  */
#ifndef PROMOTE_PROTOTYPES
#define PROMOTE_PROTOTYPES	0
#endif

/* Number of hardware registers that go into the DWARF-2 unwind info.
   If not defined, equals FIRST_PSEUDO_REGISTER  */

#ifndef DWARF_FRAME_REGISTERS
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
#endif
Commit	Line	Data
c53a8ab6 RS	1	/* Definitions of various defaults for how to do assembler output
	2	(most of which are designed to be appropriate for GAS or for
	3	some BSD assembler).
ef58a523	4	Copyright (C) 1992, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
b33c316c	5	Contributed by Ron Guilmette (rfg@monkeys.com)
c53a8ab6	6
c53a8ab6 RS	7	This file is part of GNU CC.
	8
	9	GNU CC is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2, or (at your option)
	12	any later version.
	13
	14	GNU CC is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with GNU CC; see the file COPYING. If not, write to
940d9d63 RK	21	the Free Software Foundation, 59 Temple Place - Suite 330,
940d9d63 RK	22	Boston, MA 02111-1307, USA. */
c53a8ab6	23
7b73db04 CH	24	/* Store in OUTPUT a string (made with alloca) containing
	25	an assembler-name for a local static variable or function named NAME.
	26	LABELNO is an integer which is different for each call. */
	27
	28	#ifndef ASM_FORMAT_PRIVATE_NAME
	29	#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
	30	do { \
	31	int len = strlen (NAME); \
	32	char temp = (char ) alloca (len + 3); \
	33	temp[0] = 'L'; \
	34	strcpy (&temp[1], (NAME)); \
	35	temp[len + 1] = '.'; \
	36	temp[len + 2] = 0; \
	37	(OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
	38	ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
	39	} while (0)
	40	#endif
	41
	42	#ifndef ASM_STABD_OP
	43	#define ASM_STABD_OP ".stabd"
	44	#endif
	45
	46	/* This is how to output an element of a case-vector that is absolute.
	47	Some targets don't use this, but we have to define it anyway. */
	48
	49	#ifndef ASM_OUTPUT_ADDR_VEC_ELT
	50	#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
	51	do { fprintf (FILE, "\t%s\t", ASM_LONG); \
	52	ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
	53	fputc ('\n', FILE); \
	54	} while (0)
	55	#endif
	56
8cd0faaf CM	57	/* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME. */
	58	#ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
	59	#define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
a991240f	60	do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
8cd0faaf CM	61	#endif
8cd0faaf CM	62
c53a8ab6 RS	63	/* choose a reasonable default for ASM_OUTPUT_ASCII. */
	64
	65	#ifndef ASM_OUTPUT_ASCII
	66	#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
	67	do { \
	68	FILE *_hide_asm_out_file = (MYFILE); \
47ee9bcb	69	const unsigned char _hide_p = (const unsigned char ) (MYSTRING); \
c53a8ab6 RS	70	int _hide_thissize = (MYLENGTH); \
	71	{ \
	72	FILE *asm_out_file = _hide_asm_out_file; \
47ee9bcb	73	const unsigned char *p = _hide_p; \
c53a8ab6 RS	74	int thissize = _hide_thissize; \
	75	int i; \
	76	fprintf (asm_out_file, "\t.ascii \""); \
	77	\
	78	for (i = 0; i < thissize; i++) \
	79	{ \
	80	register int c = p[i]; \
	81	if (c == '\"' \|\| c == '\\') \
	82	putc ('\\', asm_out_file); \
5f6d3823	83	if (ISPRINT(c)) \
c53a8ab6 RS	84	putc (c, asm_out_file); \
	85	else \
	86	{ \
	87	fprintf (asm_out_file, "\\%o", c); \
	88	/* After an octal-escape, if a digit follows, \
	89	terminate one string constant and start another. \
	90	The Vax assembler fails to stop reading the escape \
	91	after three digits, so this is the only way we \
	92	can get it to parse the data properly. */ \
d07ecc3b	93	if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
c53a8ab6 RS	94	fprintf (asm_out_file, "\"\n\t.ascii \""); \
	95	} \
	96	} \
	97	fprintf (asm_out_file, "\"\n"); \
	98	} \
	99	} \
	100	while (0)
	101	#endif
d0d4af87 MS	102
	103	#ifndef ASM_IDENTIFY_GCC
	104	/* Default the definition, only if ASM_IDENTIFY_GCC is not set,
	105	because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
	106	outputting labels, if we do want it to, then it must be defined
	107	in the tm.h file. */
	108	#ifndef ASM_IDENTIFY_LANGUAGE
	109	#define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
	110	#endif
	111	#endif
650f773a JW	112
	113	/* This is how we tell the assembler to equate two values. */
	114	#ifdef SET_ASM_OP
	115	#ifndef ASM_OUTPUT_DEF
	116	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
	117	do { fprintf ((FILE), "\t%s\t", SET_ASM_OP); \
	118	assemble_name (FILE, LABEL1); \
	119	fprintf (FILE, ","); \
	120	assemble_name (FILE, LABEL2); \
	121	fprintf (FILE, "\n"); \
	122	} while (0)
	123	#endif
	124	#endif
daefd78b	125
81d77cda RK	126	/* This is how to output a reference to a user-level label named NAME. */
	127
	128	#ifndef ASM_OUTPUT_LABELREF
19283265	129	#define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
81d77cda RK	130	#endif
81d77cda RK	131
daefd78b JM	132	/* This determines whether or not we support weak symbols. */
	133	#ifndef SUPPORTS_WEAK
	134	#ifdef ASM_WEAKEN_LABEL
	135	#define SUPPORTS_WEAK 1
	136	#else
	137	#define SUPPORTS_WEAK 0
	138	#endif
	139	#endif
a6ab3aad	140
8f08ea1e L	141	/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
	142	provide a weak attribute. Else define it to nothing.
	143
	144	This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
	145	not available at that time.
	146
	147	Note, this is only for use by target files which we know are to be
	148	compiled by GCC. */
	149	#ifndef TARGET_ATTRIBUTE_WEAK
	150	# if SUPPORTS_WEAK
	151	# define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
	152	# else
	153	# define TARGET_ATTRIBUTE_WEAK
	154	# endif
	155	#endif
	156
a6ab3aad JM	157	/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
a6ab3aad JM	158	the rest of the DWARF 2 frame unwind support is also provided. */
0021b564 JM	159	#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
0021b564 JM	160	#define DWARF2_UNWIND_INFO 1
a6ab3aad	161	#endif
b366352b	162
31cf0144 JM	163	#if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
	164	# if defined (EH_FRAME_SECTION_ASM_OP)
	165	# define EH_FRAME_SECTION() eh_frame_section();
	166	# else
	167	/* If we aren't using crtstuff to run ctors, don't use it for EH. */
	168	# if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
	169	# define EH_FRAME_SECTION_ASM_OP ".section\t.eh_frame,\"aw\""
	170	# define EH_FRAME_SECTION() \
	171	do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
	172	# endif
	173	# endif
	174	#endif
	175
b366352b MM	176	/* By default, we generate a label at the beginning and end of the
	177	text section, and compute the size of the text section by
	178	subtracting the two. However, on some platforms that doesn't
	179	work, and we use the section itself, rather than a label at the
	180	beginning of it, to indicate the start of the section. On such
	181	platforms, define this to zero. */
	182	#ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
	183	#define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
	184	#endif
246833ac RH	185
	186	/* Supply a default definition for PROMOTE_PROTOTYPES. */
	187	#ifndef PROMOTE_PROTOTYPES
	188	#define PROMOTE_PROTOTYPES 0
	189	#endif
c478efd1 GDR	190
	191	/* Number of hardware registers that go into the DWARF-2 unwind info.
	192	If not defined, equals FIRST_PSEUDO_REGISTER */
	193
	194	#ifndef DWARF_FRAME_REGISTERS
	195	#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
	196	#endif