gcc/config/sparc/sysv4.h - gcc - Git at Google

 /* Target definitions for GNU compiler for Sparc running System V.4
    Copyright (C) 1991, 92, 95, 96, 97, 1998 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.  */

 #include "sparc/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 WORD_SWITCH_TAKES_ARG
 #undef ASM_OUTPUT_SOURCE_LINE
 #undef SELECT_SECTION
 #undef ASM_DECLARE_FUNCTION_NAME
 #undef TEXT_SECTION_ASM_OP
 #undef DATA_SECTION_ASM_OP

 #include "svr4.h"

 /* ??? Put back the SIZE_TYPE/PTRDIFF_TYPE definitions set by sparc.h.
    Why, exactly, is svr4.h messing with this?  Seems like the chip
    would know best.  */

 #undef SIZE_TYPE
 #define SIZE_TYPE (TARGET_ARCH64 ? "long unsigned int" : "unsigned int")

 #undef PTRDIFF_TYPE
 #define PTRDIFF_TYPE (TARGET_ARCH64 ? "long int" : "int")

 /* 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 INIT_SECTION_ASM_OP
 #undef FINI_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 SET_ASM_OP	/* Has no equivalent.  See ASM_OUTPUT_DEF below.  */

 /* 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) -Asystem(svr4)"

 /* The native assembler can't compute differences between symbols in different
    sections when generating pic code, so we must put jump tables in the
    text section.  */
 /* But we now defer the tables to the end of the function, so we make
    this 0 to not confuse the branch shortening code.  */
 #define JUMP_TABLES_IN_TEXT_SECTION 0

 /* Pass -K to the assembler when PIC.  */
 #undef ASM_SPEC
 #define ASM_SPEC \
   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
    %{fpic:-K PIC} %{fPIC:-K PIC} %(asm_cpu)"

 /* Must use data section for relocatable constants when pic.  */
 #undef SELECT_RTX_SECTION
 #define SELECT_RTX_SECTION(MODE,RTX)		\
 {						\
   if (flag_pic && symbolic_operand (RTX))	\
     data_section ();				\
   else						\
     const_section ();				\
 }

 /* 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_DOUBLE_INT_ASM_OP ".uaxword"
 #define UNALIGNED_INT_ASM_OP	".uaword"
 #define UNALIGNED_SHORT_ASM_OP	".uahalf"
 #define PUSHSECTION_ASM_OP	".pushsection"
 #define POPSECTION_ASM_OP	".popsection"

 /* This is defined in sparc.h but is not used by svr4.h.  */
 #undef ASM_LONG
 #define ASM_LONG ".long"

 /* 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	"\t%s\t\"%s\"\n"

 #undef ASM_OUTPUT_CASE_LABEL
 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE)		\
 do { ASM_OUTPUT_ALIGN ((FILE), Pmode == SImode ? 2 : 3);		\
      ASM_OUTPUT_INTERNAL_LABEL ((FILE), PREFIX, NUM);			\
    } while (0)

 /* 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)

 /* 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) + 8)

 /* 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\""
 #define FINI_SECTION_ASM_OP	".section\t\".fini\""

 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.

    Note that we want to give these sections the SHF_WRITE attribute
    because these sections will actually contain data (i.e. tables of
    addresses of functions in the current root executable or shared library
    file) and, in the case of a shared library, the relocatable addresses
    will have to be properly resolved/relocated (and then written into) by
    the dynamic linker when it actually attaches the given shared library
    to the executing process.  (Note that on SVR4, you may wish to use the
    `-z text' option to the ELF linker, when building a shared library, as
    an additional check that you are doing everything right.  But if you do
    use the `-z text' option when building a shared library, you will get
    errors unless the .ctors and .dtors sections are marked as writable
    via the SHF_WRITE attribute.)  */

 #undef CTORS_SECTION_ASM_OP
 #define CTORS_SECTION_ASM_OP    ".section\t\".ctors\",#alloc,#write"
 #undef DTORS_SECTION_ASM_OP
 #define DTORS_SECTION_ASM_OP    ".section\t\".dtors\",#alloc,#write"
 #undef EH_FRAME_SECTION_ASM_OP
 #define EH_FRAME_SECTION_ASM_OP ".section\t\".eh_frame\",#alloc,#write"

 /* A C statement to output something to the assembler file to switch to section
    NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
    NULL_TREE.  Some target formats do not support arbitrary sections.  Do not
    define this macro in such cases.  */

 #undef	ASM_OUTPUT_SECTION_NAME	/* Override svr4.h's definition.  */
 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
 do {									\
   if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)			\
     fprintf (FILE, ".section\t\"%s\",#alloc,#execinstr\n",		\
 	                                      (NAME));		\
   else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))		\
     fprintf (FILE, ".section\t\"%s\",#alloc\n", (NAME));		\
   else									\
     fprintf (FILE, ".section\t\"%s\",#alloc,#write\n", (NAME));		\
 } while (0)

 /* Output assembler code to FILE to initialize this source file's
    basic block profiling info, if that has not already been done.  */

 #undef FUNCTION_BLOCK_PROFILER
 #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
   do { \
     fprintf (FILE, "\tsethi %%hi(.LLPBX0),%%o0\n\tld [%%lo(.LLPBX0)+%%o0],%%o1\n\ttst %%o1\n\tbne LPY%d\n\tadd %%o0,%%lo(.LLPBX0),%%o0\n\tcall __bb_init_func\n\tnop\nLPY%d:\n", \
 	     (LABELNO), (LABELNO)); \
   } while (0)

 /* Output assembler code to FILE to increment the entry-count for
    the BLOCKNO'th basic block in this source file.  */

 #undef BLOCK_PROFILER
 #define BLOCK_PROFILER(FILE, BLOCKNO) \
 { \
   int blockn = (BLOCKNO); \
   fprintf (FILE, "\tsethi %%hi(.LLPBX2+%d),%%g1\n\tld [%%lo(.LLPBX2+%d)+%%g1],%%g2\n\
 \tadd %%g2,1,%%g2\n\tst %%g2,[%%lo(.LLPBX2+%d)+%%g1]\n", \
 	   4 * blockn, 4 * blockn, 4 * blockn); \
 }

 /* A C statement (sans semicolon) to output to the stdio stream
    FILE the assembler definition of uninitialized global DECL named
    NAME whose size is SIZE bytes and alignment is ALIGN bytes.
    Try to use asm_output_aligned_bss to implement this macro.  */

 #undef ASM_OUTPUT_ALIGNED_BSS
 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
	/* Target definitions for GNU compiler for Sparc running System V.4
	Copyright (C) 1991, 92, 95, 96, 97, 1998 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. */

	#include "sparc/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 WORD_SWITCH_TAKES_ARG
	#undef ASM_OUTPUT_SOURCE_LINE
	#undef SELECT_SECTION
	#undef ASM_DECLARE_FUNCTION_NAME
	#undef TEXT_SECTION_ASM_OP
	#undef DATA_SECTION_ASM_OP

	#include "svr4.h"

	/* ??? Put back the SIZE_TYPE/PTRDIFF_TYPE definitions set by sparc.h.
	Why, exactly, is svr4.h messing with this? Seems like the chip
	would know best. */

	#undef SIZE_TYPE
	#define SIZE_TYPE (TARGET_ARCH64 ? "long unsigned int" : "unsigned int")

	#undef PTRDIFF_TYPE
	#define PTRDIFF_TYPE (TARGET_ARCH64 ? "long int" : "int")

	/* 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 INIT_SECTION_ASM_OP
	#undef FINI_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 SET_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */

	/* 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) -Asystem(svr4)"

	/* The native assembler can't compute differences between symbols in different
	sections when generating pic code, so we must put jump tables in the
	text section. */
	/* But we now defer the tables to the end of the function, so we make
	this 0 to not confuse the branch shortening code. */
	#define JUMP_TABLES_IN_TEXT_SECTION 0

	/* Pass -K to the assembler when PIC. */
	#undef ASM_SPEC
	#define ASM_SPEC \
	"%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,} %{Yd,} %{Wa,:%} \
	%{fpic:-K PIC} %{fPIC:-K PIC} %(asm_cpu)"

	/* Must use data section for relocatable constants when pic. */
	#undef SELECT_RTX_SECTION
	#define SELECT_RTX_SECTION(MODE,RTX) \
	{ \
	if (flag_pic && symbolic_operand (RTX)) \
	data_section (); \
	else \
	const_section (); \
	}

	/* 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_DOUBLE_INT_ASM_OP ".uaxword"
	#define UNALIGNED_INT_ASM_OP ".uaword"
	#define UNALIGNED_SHORT_ASM_OP ".uahalf"
	#define PUSHSECTION_ASM_OP ".pushsection"
	#define POPSECTION_ASM_OP ".popsection"

	/* This is defined in sparc.h but is not used by svr4.h. */
	#undef ASM_LONG
	#define ASM_LONG ".long"

	/* 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 "\t%s\t\"%s\"\n"

	#undef ASM_OUTPUT_CASE_LABEL
	#define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
	do { ASM_OUTPUT_ALIGN ((FILE), Pmode == SImode ? 2 : 3); \
	ASM_OUTPUT_INTERNAL_LABEL ((FILE), PREFIX, NUM); \
	} while (0)

	/* 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)

	/* 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) + 8)

	/* 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\""
	#define FINI_SECTION_ASM_OP ".section\t\".fini\""

	/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.

	Note that we want to give these sections the SHF_WRITE attribute
	because these sections will actually contain data (i.e. tables of
	addresses of functions in the current root executable or shared library
	file) and, in the case of a shared library, the relocatable addresses
	will have to be properly resolved/relocated (and then written into) by
	the dynamic linker when it actually attaches the given shared library
	to the executing process. (Note that on SVR4, you may wish to use the
	`-z text' option to the ELF linker, when building a shared library, as
	an additional check that you are doing everything right. But if you do
	use the `-z text' option when building a shared library, you will get
	errors unless the .ctors and .dtors sections are marked as writable
	via the SHF_WRITE attribute.) */

	#undef CTORS_SECTION_ASM_OP
	#define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc,#write"
	#undef DTORS_SECTION_ASM_OP
	#define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc,#write"
	#undef EH_FRAME_SECTION_ASM_OP
	#define EH_FRAME_SECTION_ASM_OP ".section\t\".eh_frame\",#alloc,#write"

	/* A C statement to output something to the assembler file to switch to section
	NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
	NULL_TREE. Some target formats do not support arbitrary sections. Do not
	define this macro in such cases. */

	#undef ASM_OUTPUT_SECTION_NAME /* Override svr4.h's definition. */
	#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
	do { \
	if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
	fprintf (FILE, ".section\t\"%s\",#alloc,#execinstr\n", \
	(NAME)); \
	else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
	fprintf (FILE, ".section\t\"%s\",#alloc\n", (NAME)); \
	else \
	fprintf (FILE, ".section\t\"%s\",#alloc,#write\n", (NAME)); \
	} while (0)

	/* Output assembler code to FILE to initialize this source file's
	basic block profiling info, if that has not already been done. */

	#undef FUNCTION_BLOCK_PROFILER
	#define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
	do { \
	fprintf (FILE, "\tsethi %%hi(.LLPBX0),%%o0\n\tld [%%lo(.LLPBX0)+%%o0],%%o1\n\ttst %%o1\n\tbne LPY%d\n\tadd %%o0,%%lo(.LLPBX0),%%o0\n\tcall __bb_init_func\n\tnop\nLPY%d:\n", \
	(LABELNO), (LABELNO)); \
	} while (0)

	/* Output assembler code to FILE to increment the entry-count for
	the BLOCKNO'th basic block in this source file. */

	#undef BLOCK_PROFILER
	#define BLOCK_PROFILER(FILE, BLOCKNO) \
	{ \
	int blockn = (BLOCKNO); \
	fprintf (FILE, "\tsethi %%hi(.LLPBX2+%d),%%g1\n\tld [%%lo(.LLPBX2+%d)+%%g1],%%g2\n\
	\tadd %%g2,1,%%g2\n\tst %%g2,[%%lo(.LLPBX2+%d)+%%g1]\n", \
	4 * blockn, 4 * blockn, 4 * blockn); \
	}

	/* A C statement (sans semicolon) to output to the stdio stream
	FILE the assembler definition of uninitialized global DECL named
	NAME whose size is SIZE bytes and alignment is ALIGN bytes.
	Try to use asm_output_aligned_bss to implement this macro. */

	#undef ASM_OUTPUT_ALIGNED_BSS
	#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
	asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)