gcc/config/arm/coff.h - gcc - Git at Google

 /* Definitions of target machine for GNU compiler,
    for ARM with COFF obj format.
    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
    Contributed by Doug Evans (dje@cygnus.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 "arm/semi.h"

 /* Run-time Target Specification.  */
 #undef TARGET_VERSION
 #define TARGET_VERSION fputs (" (ARM/coff)", stderr)

 /* ??? Maybe use --with{enable?}-fpu or some such to make hardware floating
    point the default.  NOT --nfp!  --with{enable?} is supposed to replace it
    (right?), so let's stop using it.  */
 #undef TARGET_DEFAULT
 #define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32)

 /* ??? Is a big-endian default intended to be supported?  */
 #if 0 /*TARGET_CPU_DEFAULT & ARM_FLAG_BIG_END*/
 #define MULTILIB_DEFAULTS { "mbig-endian" }
 #else
 #define MULTILIB_DEFAULTS { "mlittle-endian" }
 #endif

 /* ??? Does arm.h really need to set this to 32?  */
 #undef STRUCTURE_SIZE_BOUNDARY
 #define STRUCTURE_SIZE_BOUNDARY 8

 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
    is a valid machine specific attribute for DECL.
    The attributes in ATTRIBUTES have previously been assigned to DECL.  */
 extern int arm_valid_machine_decl_attribute ();
 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
 arm_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)

 /* This is COFF, but prefer stabs.  */
 #define SDB_DEBUGGING_INFO

 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

 #include "dbxcoff.h"

 #undef LOCAL_LABEL_PREFIX
 #define LOCAL_LABEL_PREFIX "."

 #undef USER_LABEL_PREFIX
 #define USER_LABEL_PREFIX ""

 /* A C statement to output assembler commands which will identify the
    object file as having been compiled with GNU CC (or another GNU
    compiler).  */
 /* Define this to NULL so we don't get anything.
    We have ASM_IDENTIFY_LANGUAGE.
    Also, when using stabs, gcc2_compiled must be a stabs entry, not an
    ordinary symbol, or gdb won't see it.  The stabs entry must be
    before the N_SO in order for gdb to find it.  */
 #define ASM_IDENTIFY_GCC(STREAM)

 /* This outputs a lot of .req's to define alias for various registers.
    Let's try to avoid this.  */
 #undef ASM_FILE_START
 #define ASM_FILE_START(STREAM) \
 do {								\
   extern char *version_string;					\
   fprintf (STREAM, "%s Generated by gcc %s for ARM/coff\n",	\
 	   ASM_COMMENT_START, version_string);			\
 } while (0)

 /* 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.  */
 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
 do {								\
   if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)		\
     fprintf (STREAM, "\t.section %s,\"x\"\n", (NAME));		\
   else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))	\
     fprintf (STREAM, "\t.section %s,\"\"\n", (NAME));		\
   else								\
     fprintf (STREAM, "\t.section %s,\"w\"\n", (NAME));		\
 } while (0)

 /* Support the ctors/dtors and other sections.  */

 #undef INIT_SECTION_ASM_OP

 /* Define this macro if jump tables (for `tablejump' insns) should be
    output in the text section, along with the assembler instructions.
    Otherwise, the readonly data section is used.  */
 #define JUMP_TABLES_IN_TEXT_SECTION

 #undef READONLY_DATA_SECTION
 #define READONLY_DATA_SECTION	rdata_section
 #undef RDATA_SECTION_ASM_OP
 #define RDATA_SECTION_ASM_OP	"\t.section .rdata"

 #undef CTORS_SECTION_ASM_OP
 #define CTORS_SECTION_ASM_OP	"\t.section .ctors,\"x\""
 #undef DTORS_SECTION_ASM_OP
 #define DTORS_SECTION_ASM_OP	"\t.section .dtors,\"x\""

 /* A list of other sections which the compiler might be "in" at any
    given time.  */

 #undef EXTRA_SECTIONS
 #define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_rdata, in_ctors, in_dtors

 #define SUBTARGET_EXTRA_SECTIONS

 /* A list of extra section function definitions.  */

 #undef EXTRA_SECTION_FUNCTIONS
 #define EXTRA_SECTION_FUNCTIONS \
   RDATA_SECTION_FUNCTION	\
   CTORS_SECTION_FUNCTION	\
   DTORS_SECTION_FUNCTION	\
   SUBTARGET_EXTRA_SECTION_FUNCTIONS

 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS

 #define RDATA_SECTION_FUNCTION \
 void									\
 rdata_section ()							\
 {									\
   if (in_section != in_rdata)						\
     {									\
       fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP);		\
       in_section = in_rdata;						\
     }									\
 }

 #define CTORS_SECTION_FUNCTION \
 void									\
 ctors_section ()							\
 {									\
   if (in_section != in_ctors)						\
     {									\
       fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);		\
       in_section = in_ctors;						\
     }									\
 }

 #define DTORS_SECTION_FUNCTION \
 void									\
 dtors_section ()							\
 {									\
   if (in_section != in_dtors)						\
     {									\
       fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);		\
       in_section = in_dtors;						\
     }									\
 }

 /* Support the ctors/dtors sections for g++.  */

 #define INT_ASM_OP ".word"

 /* A C statement (sans semicolon) to output an element in the table of
    global constructors.  */
 #undef ASM_OUTPUT_CONSTRUCTOR
 #define ASM_OUTPUT_CONSTRUCTOR(STREAM,NAME) \
 do {						\
   ctors_section ();				\
   fprintf (STREAM, "\t%s\t ", INT_ASM_OP);	\
   assemble_name (STREAM, NAME);			\
   fprintf (STREAM, "\n");			\
 } while (0)

 /* A C statement (sans semicolon) to output an element in the table of
    global destructors.  */
 #undef ASM_OUTPUT_DESTRUCTOR
 #define ASM_OUTPUT_DESTRUCTOR(STREAM,NAME) \
 do {						\
   dtors_section ();                   		\
   fprintf (STREAM, "\t%s\t ", INT_ASM_OP);	\
   assemble_name (STREAM, NAME);              	\
   fprintf (STREAM, "\n");			\
 } while (0)

 /* __CTOR_LIST__ and __DTOR_LIST__ must be defined by the linker script.  */
 #define CTOR_LISTS_DEFINED_EXTERNALLY

 #undef DO_GLOBAL_CTORS_BODY
 #undef DO_GLOBAL_DTORS_BODY

 /* The ARM development system has atexit and doesn't have _exit,
    so define this for now.  */
 #define HAVE_ATEXIT

 /* The ARM development system defines __main.  */
 #define NAME__MAIN "__gccmain"
 #define SYMBOL__MAIN __gccmain
	/* Definitions of target machine for GNU compiler,
	for ARM with COFF obj format.
	Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
	Contributed by Doug Evans (dje@cygnus.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 "arm/semi.h"

	/* Run-time Target Specification. */
	#undef TARGET_VERSION
	#define TARGET_VERSION fputs (" (ARM/coff)", stderr)

	/* ??? Maybe use --with{enable?}-fpu or some such to make hardware floating
	point the default. NOT --nfp! --with{enable?} is supposed to replace it
	(right?), so let's stop using it. */
	#undef TARGET_DEFAULT
	#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT \| ARM_FLAG_APCS_32)

	/* ??? Is a big-endian default intended to be supported? */
	#if 0 /TARGET_CPU_DEFAULT & ARM_FLAG_BIG_END/
	#define MULTILIB_DEFAULTS { "mbig-endian" }
	#else
	#define MULTILIB_DEFAULTS { "mlittle-endian" }
	#endif

	/* ??? Does arm.h really need to set this to 32? */
	#undef STRUCTURE_SIZE_BOUNDARY
	#define STRUCTURE_SIZE_BOUNDARY 8

	/* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
	is a valid machine specific attribute for DECL.
	The attributes in ATTRIBUTES have previously been assigned to DECL. */
	extern int arm_valid_machine_decl_attribute ();
	#define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
	arm_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)

	/* This is COFF, but prefer stabs. */
	#define SDB_DEBUGGING_INFO

	#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

	#include "dbxcoff.h"

	#undef LOCAL_LABEL_PREFIX
	#define LOCAL_LABEL_PREFIX "."

	#undef USER_LABEL_PREFIX
	#define USER_LABEL_PREFIX ""

	/* A C statement to output assembler commands which will identify the
	object file as having been compiled with GNU CC (or another GNU
	compiler). */
	/* Define this to NULL so we don't get anything.
	We have ASM_IDENTIFY_LANGUAGE.
	Also, when using stabs, gcc2_compiled must be a stabs entry, not an
	ordinary symbol, or gdb won't see it. The stabs entry must be
	before the N_SO in order for gdb to find it. */
	#define ASM_IDENTIFY_GCC(STREAM)

	/* This outputs a lot of .req's to define alias for various registers.
	Let's try to avoid this. */
	#undef ASM_FILE_START
	#define ASM_FILE_START(STREAM) \
	do { \
	extern char *version_string; \
	fprintf (STREAM, "%s Generated by gcc %s for ARM/coff\n", \
	ASM_COMMENT_START, version_string); \
	} while (0)

	/* 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. */
	#define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
	do { \
	if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
	fprintf (STREAM, "\t.section %s,\"x\"\n", (NAME)); \
	else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
	fprintf (STREAM, "\t.section %s,\"\"\n", (NAME)); \
	else \
	fprintf (STREAM, "\t.section %s,\"w\"\n", (NAME)); \
	} while (0)

	/* Support the ctors/dtors and other sections. */

	#undef INIT_SECTION_ASM_OP

	/* Define this macro if jump tables (for `tablejump' insns) should be
	output in the text section, along with the assembler instructions.
	Otherwise, the readonly data section is used. */
	#define JUMP_TABLES_IN_TEXT_SECTION

	#undef READONLY_DATA_SECTION
	#define READONLY_DATA_SECTION rdata_section
	#undef RDATA_SECTION_ASM_OP
	#define RDATA_SECTION_ASM_OP "\t.section .rdata"

	#undef CTORS_SECTION_ASM_OP
	#define CTORS_SECTION_ASM_OP "\t.section .ctors,\"x\""
	#undef DTORS_SECTION_ASM_OP
	#define DTORS_SECTION_ASM_OP "\t.section .dtors,\"x\""

	/* A list of other sections which the compiler might be "in" at any
	given time. */

	#undef EXTRA_SECTIONS
	#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_rdata, in_ctors, in_dtors

	#define SUBTARGET_EXTRA_SECTIONS

	/* A list of extra section function definitions. */

	#undef EXTRA_SECTION_FUNCTIONS
	#define EXTRA_SECTION_FUNCTIONS \
	RDATA_SECTION_FUNCTION \
	CTORS_SECTION_FUNCTION \
	DTORS_SECTION_FUNCTION \
	SUBTARGET_EXTRA_SECTION_FUNCTIONS

	#define SUBTARGET_EXTRA_SECTION_FUNCTIONS

	#define RDATA_SECTION_FUNCTION \
	void \
	rdata_section () \
	{ \
	if (in_section != in_rdata) \
	{ \
	fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP); \
	in_section = in_rdata; \
	} \
	}

	#define CTORS_SECTION_FUNCTION \
	void \
	ctors_section () \
	{ \
	if (in_section != in_ctors) \
	{ \
	fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
	in_section = in_ctors; \
	} \
	}

	#define DTORS_SECTION_FUNCTION \
	void \
	dtors_section () \
	{ \
	if (in_section != in_dtors) \
	{ \
	fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
	in_section = in_dtors; \
	} \
	}

	/* Support the ctors/dtors sections for g++. */

	#define INT_ASM_OP ".word"

	/* A C statement (sans semicolon) to output an element in the table of
	global constructors. */
	#undef ASM_OUTPUT_CONSTRUCTOR
	#define ASM_OUTPUT_CONSTRUCTOR(STREAM,NAME) \
	do { \
	ctors_section (); \
	fprintf (STREAM, "\t%s\t ", INT_ASM_OP); \
	assemble_name (STREAM, NAME); \
	fprintf (STREAM, "\n"); \
	} while (0)

	/* A C statement (sans semicolon) to output an element in the table of
	global destructors. */
	#undef ASM_OUTPUT_DESTRUCTOR
	#define ASM_OUTPUT_DESTRUCTOR(STREAM,NAME) \
	do { \
	dtors_section (); \
	fprintf (STREAM, "\t%s\t ", INT_ASM_OP); \
	assemble_name (STREAM, NAME); \
	fprintf (STREAM, "\n"); \
	} while (0)

	/* __CTOR_LIST__ and __DTOR_LIST__ must be defined by the linker script. */
	#define CTOR_LISTS_DEFINED_EXTERNALLY

	#undef DO_GLOBAL_CTORS_BODY
	#undef DO_GLOBAL_DTORS_BODY

	/* The ARM development system has atexit and doesn't have _exit,
	so define this for now. */
	#define HAVE_ATEXIT

	/* The ARM development system defines __main. */
	#define NAME__MAIN "__gccmain"
	#define SYMBOL__MAIN __gccmain