[gcc.git] / gcc / config / sparc / sysv4.h

/* Target definitions for GNU compiler for Sparc running System V.4
   Copyright (C) 1991, 1992 Free Software Foundation, Inc.

   Written by Ron Guilmette (rfg@ncd.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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "sparc.h"

/* Undefine some symbols which are defined in "sparc.h" but which are
   appropriate only for SunOS 4.x, and not for svr4.  */

#undef DBX_DEBUGGING_INFO
#undef WORD_SWITCH_TAKES_ARG
#undef SELECT_SECTION
#undef ASM_DECLARE_FUNCTION_NAME
#undef TEXT_SECTION_ASM_OP
#undef DATA_SECTION_ASM_OP

#include "svr4.h"

/* Undefined some symbols which are defined in "svr4.h" but which are
   appropriate only for typical svr4 systems, but not for the specific
   case of svr4 running on a Sparc.  */

#undef CTORS_SECTION_ASM_OP
#undef DTORS_SECTION_ASM_OP
#undef INIT_SECTION_ASM_OP
#undef CONST_SECTION_ASM_OP
#undef TYPE_OPERAND_FMT
#undef PUSHSECTION_FORMAT
#undef STRING_ASM_OP
#undef COMMON_ASM_OP
#undef SKIP_ASM_OP
#undef DEF_ASM_OP	/* Has no equivalent.  See ASM_OUTPUT_DEF below.  */
#undef ASM_GENERATE_INTERNAL_LABEL
#undef ASM_OUTPUT_INTERNAL_LABEL

/* Provide a set of pre-definitions and pre-assertions appropriate for
   the Sparc running svr4.  __svr4__ is our extension.  */

#define CPP_PREDEFINES \
  "-Dsparc -Dunix -D__svr4__ -Asystem(unix) -Acpu(sparc) -Amachine(sparc)"

/* This is the string used to begin an assembly language comment for the
   Sparc/svr4 assembler.  */

#define ASM_COMMENT_START "!"

/* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
   Note that many of these are different from the typical pseudo-ops used
   by most svr4 assemblers.  That is probably due to a (misguided?) attempt
   to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
   assembler.  */

#define STRING_ASM_OP		".asciz"
#define COMMON_ASM_OP		".common"
#define SKIP_ASM_OP		".skip"
#define UNALIGNED_INT_ASM_OP	".uaword"
#define UNALIGNED_SHORT_ASM_OP	".uahalf"
#define PUSHSECTION_ASM_OP	".pushsection"
#define POPSECTION_ASM_OP	".popsection"

/* This is the format used to print the second operand of a .type pseudo-op
   for the Sparc/svr4 assembler.  */

#define TYPE_OPERAND_FMT      "#%s"

/* This is the format used to print a .pushsection pseudo-op (and its operand)
   for the Sparc/svr4 assembler.  */

#define PUSHSECTION_FORMAT	"%s\t\"%s\"\n"

/* This is how to equate one symbol to another symbol.  The syntax used is
   `SYM1=SYM2'.  Note that this is different from the way equates are done
   with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'.  */

#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do {	fprintf ((FILE), "\t");						\
	assemble_name (FILE, LABEL1);					\
	fprintf (FILE, " = ");						\
	assemble_name (FILE, LABEL2);					\
	fprintf (FILE, "\n");						\
  } while (0)

/* Generate the special assembly code needed to align the start of a jump
   tables.  Under svr4, jump tables go into the .rodata section.  Other
   things (e.g. constants) may be put into the .rodata section too, and
   those other things may end on odd (i.e. unaligned) boundaries, so we
   need to get re-aligned just before we output each jump table.  */

#define ASM_OUTPUT_ALIGN_JUMP_TABLE(FILE) ASM_OUTPUT_ALIGN ((FILE), 2)

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

   If the NUM argument is negative, we don't use it when generating the
   label.

   For most svr4 systems, the convention is that any symbol which begins
   with a period is not put into the linker symbol table by the assembler,
   however the current Sparc/svr4 assembler is brain-dammaged and it needs
   to see `.L' at the start of a symbol or else it will be put into the
   linker symbol table.
*/

#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM)			\
do {									\
  if ((int) (NUM) >= 0)							\
    fprintf (FILE, ".L%s%d:\n", PREFIX, NUM);				\
  else									\
    fprintf (FILE, ".L%s:\n", PREFIX);					\
} while (0)

/* This is how to store into the string LABEL
   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'.

   If the NUM argument is negative, we don't use it when generating the
   label.

   For most svr4 systems, the convention is that any symbol which begins
   with a period is not put into the linker symbol table by the assembler,
   however the current Sparc/svr4 assembler is brain-dammaged and it needs
   to see `.L' at the start of a symbol or else it will be put into the
   linker symbol table.
*/

#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)			\
do {									\
  if ((int) (NUM) >= 0)							\
    sprintf (LABEL, "*.L%s%d", PREFIX, NUM);				\
  else									\
    sprintf (LABEL, "*.L%s", PREFIX);					\
} while (0)

/* Define how the Sparc registers should be numbered for Dwarf output.
   The numbering provided here should be compatible with the native
   svr4 SDB debugger in the Sparc/svr4 reference port.  The numbering
   is as follows:

   Assembly name	gcc internal regno	Dwarf regno
   ----------------------------------------------------------
   g0-g7		0-7			0-7
   o0-o7		8-15			8-15
   l0-l7		16-23			16-23
   i0-i7		24-31			24-31
   f0-f31		32-63			40-71
*/

#define DBX_REGISTER_NUMBER(REGNO)					\
  (((REGNO) < 32) ? (REGNO)						\
   : ((REGNO) < 63) ? ((REGNO) + 8)					\
   : (abort (), 0))

/* A set of symbol definitions for assembly pseudo-ops which will
   get us switched to various sections of interest.  These are used
   in all places where we simply want to switch to a section, and
   *not* to push the previous section name onto the assembler's
   section names stack (as we do often in dwarfout.c).  */

#define TEXT_SECTION_ASM_OP	".section\t\".text\""
#define DATA_SECTION_ASM_OP	".section\t\".data\""
#define BSS_SECTION_ASM_OP	".section\t\".bss\""
#define CONST_SECTION_ASM_OP	".section\t\".rodata\""
#define INIT_SECTION_ASM_OP	".section\t\".init\",#alloc"
#define CTORS_SECTION_ASM_OP    ".section\t\".ctors\",#alloc"
#define DTORS_SECTION_ASM_OP    ".section\t\".dtors\",#alloc"
Commit	Line	Data
17fd0700	1	/* Target definitions for GNU compiler for Sparc running System V.4
19c3fc24	2	Copyright (C) 1991, 1992 Free Software Foundation, Inc.
17fd0700 RS	3
	4	Written by Ron Guilmette (rfg@ncd.com).
	5
	6	This file is part of GNU CC.
	7
	8	GNU CC is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2, or (at your option)
	11	any later version.
	12
	13	GNU CC is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with GNU CC; see the file COPYING. If not, write to
	20	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
	21
	22	#include "sparc.h"
19c3fc24 RS	23
	24	/* Undefine some symbols which are defined in "sparc.h" but which are
	25	appropriate only for SunOS 4.x, and not for svr4. */
	26
	27	#undef DBX_DEBUGGING_INFO
	28	#undef WORD_SWITCH_TAKES_ARG
	29	#undef SELECT_SECTION
	30	#undef ASM_DECLARE_FUNCTION_NAME
	31	#undef TEXT_SECTION_ASM_OP
	32	#undef DATA_SECTION_ASM_OP
	33
17fd0700 RS	34	#include "svr4.h"
17fd0700 RS	35
19c3fc24 RS	36	/* Undefined some symbols which are defined in "svr4.h" but which are
	37	appropriate only for typical svr4 systems, but not for the specific
	38	case of svr4 running on a Sparc. */
	39
	40	#undef CTORS_SECTION_ASM_OP
	41	#undef DTORS_SECTION_ASM_OP
	42	#undef INIT_SECTION_ASM_OP
	43	#undef CONST_SECTION_ASM_OP
	44	#undef TYPE_OPERAND_FMT
	45	#undef PUSHSECTION_FORMAT
	46	#undef STRING_ASM_OP
	47	#undef COMMON_ASM_OP
	48	#undef SKIP_ASM_OP
	49	#undef DEF_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
	50	#undef ASM_GENERATE_INTERNAL_LABEL
	51	#undef ASM_OUTPUT_INTERNAL_LABEL
	52
17fd0700	53	/* Provide a set of pre-definitions and pre-assertions appropriate for
19c3fc24	54	the Sparc running svr4. __svr4__ is our extension. */
17fd0700 RS	55
	56	#define CPP_PREDEFINES \
	57	"-Dsparc -Dunix -D__svr4__ -Asystem(unix) -Acpu(sparc) -Amachine(sparc)"
	58
19c3fc24 RS	59	/* This is the string used to begin an assembly language comment for the
	60	Sparc/svr4 assembler. */
	61
17fd0700 RS	62	#define ASM_COMMENT_START "!"
17fd0700 RS	63
19c3fc24 RS	64	/* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
	65	Note that many of these are different from the typical pseudo-ops used
	66	by most svr4 assemblers. That is probably due to a (misguided?) attempt
	67	to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
	68	assembler. */
	69
aa6b905d RS	70	#define STRING_ASM_OP ".asciz"
	71	#define COMMON_ASM_OP ".common"
	72	#define SKIP_ASM_OP ".skip"
	73	#define UNALIGNED_INT_ASM_OP ".uaword"
	74	#define UNALIGNED_SHORT_ASM_OP ".uahalf"
	75	#define PUSHSECTION_ASM_OP ".pushsection"
	76	#define POPSECTION_ASM_OP ".popsection"
19c3fc24 RS	77
	78	/* This is the format used to print the second operand of a .type pseudo-op
	79	for the Sparc/svr4 assembler. */
	80
17fd0700 RS	81	#define TYPE_OPERAND_FMT "#%s"
17fd0700 RS	82
19c3fc24 RS	83	/* This is the format used to print a .pushsection pseudo-op (and its operand)
	84	for the Sparc/svr4 assembler. */
	85
	86	#define PUSHSECTION_FORMAT "%s\t\"%s\"\n"
	87
	88	/* This is how to equate one symbol to another symbol. The syntax used is
	89	`SYM1=SYM2'. Note that this is different from the way equates are done
	90	with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'. */
	91
	92	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
	93	do { fprintf ((FILE), "\t"); \
	94	assemble_name (FILE, LABEL1); \
	95	fprintf (FILE, " = "); \
	96	assemble_name (FILE, LABEL2); \
	97	fprintf (FILE, "\n"); \
	98	} while (0)
	99
	100	/* Generate the special assembly code needed to align the start of a jump
	101	tables. Under svr4, jump tables go into the .rodata section. Other
	102	things (e.g. constants) may be put into the .rodata section too, and
	103	those other things may end on odd (i.e. unaligned) boundaries, so we
	104	need to get re-aligned just before we output each jump table. */
	105
	106	#define ASM_OUTPUT_ALIGN_JUMP_TABLE(FILE) ASM_OUTPUT_ALIGN ((FILE), 2)
	107
	108	/* This is how to output an internal numbered label where
	109	PREFIX is the class of label and NUM is the number within the class.
	110
	111	If the NUM argument is negative, we don't use it when generating the
	112	label.
	113
	114	For most svr4 systems, the convention is that any symbol which begins
	115	with a period is not put into the linker symbol table by the assembler,
	116	however the current Sparc/svr4 assembler is brain-dammaged and it needs
	117	to see `.L' at the start of a symbol or else it will be put into the
	118	linker symbol table.
	119	*/
	120
	121	#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
	122	do { \
	123	if ((int) (NUM) >= 0) \
	124	fprintf (FILE, ".L%s%d:\n", PREFIX, NUM); \
	125	else \
	126	fprintf (FILE, ".L%s:\n", PREFIX); \
	127	} while (0)
	128
	129	/* This is how to store into the string LABEL
	130	the symbol_ref name of an internal numbered label where
	131	PREFIX is the class of label and NUM is the number within the class.
	132	This is suitable for output with `assemble_name'.
	133
	134	If the NUM argument is negative, we don't use it when generating the
	135	label.
	136
	137	For most svr4 systems, the convention is that any symbol which begins
	138	with a period is not put into the linker symbol table by the assembler,
	139	however the current Sparc/svr4 assembler is brain-dammaged and it needs
	140	to see `.L' at the start of a symbol or else it will be put into the
	141	linker symbol table.
	142	*/
	143
	144	#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
	145	do { \
	146	if ((int) (NUM) >= 0) \
147	sprintf (LABEL, "*.L%s%d", PREFIX, NUM); \
148	else \
149	sprintf (LABEL, "*.L%s", PREFIX); \
150	} while (0)
151
152	/* Define how the Sparc registers should be numbered for Dwarf output.
17fd0700	153	The numbering provided here should be compatible with the native
19c3fc24 RS	154	svr4 SDB debugger in the Sparc/svr4 reference port. The numbering
	155	is as follows:
	156
	157	Assembly name gcc internal regno Dwarf regno
	158	----------------------------------------------------------
	159	g0-g7 0-7 0-7
	160	o0-o7 8-15 8-15
	161	l0-l7 16-23 16-23
	162	i0-i7 24-31 24-31
	163	f0-f31 32-63 40-71
	164	*/
17fd0700 RS	165
17fd0700 RS	166	#define DBX_REGISTER_NUMBER(REGNO) \
19c3fc24 RS	167	(((REGNO) < 32) ? (REGNO) \
	168	: ((REGNO) < 63) ? ((REGNO) + 8) \
	169	: (abort (), 0))
17fd0700	170
19c3fc24 RS	171	/* A set of symbol definitions for assembly pseudo-ops which will
	172	get us switched to various sections of interest. These are used
	173	in all places where we simply want to switch to a section, and
	174	not to push the previous section name onto the assembler's
	175	section names stack (as we do often in dwarfout.c). */
17fd0700	176
aa6b905d RS	177	#define TEXT_SECTION_ASM_OP ".section\t\".text\""
	178	#define DATA_SECTION_ASM_OP ".section\t\".data\""
	179	#define BSS_SECTION_ASM_OP ".section\t\".bss\""
	180	#define CONST_SECTION_ASM_OP ".section\t\".rodata\""
	181	#define INIT_SECTION_ASM_OP ".section\t\".init\",#alloc"
	182	#define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc"
	183	#define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc"