gcc/config/netbsd-aout.h - gcc - Git at Google

 /* Common configuration file for NetBSD a.out targets.
    Copyright (C) 2002 Free Software Foundation, Inc.
    Contributed by Wasabi Systems, 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.  */

 /* This defines which switch letters take arguments. */

 #undef SWITCH_TAKES_ARG
 #define SWITCH_TAKES_ARG(CHAR)		\
   (DEFAULT_SWITCH_TAKES_ARG(CHAR)	\
    || (CHAR) == 'R')


 /* Provide an ASM_SPEC appropriate for NetBSD.  Currently we only deal
    with the options for generating PIC code.  */

 #undef ASM_SPEC
 #define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k -K}"


 /* Provide a STARTFILE_SPEC appropriate for NetBSD a.out.  Here we
    provide support for the special GCC option -static.  */

 #undef STARTFILE_SPEC
 #define STARTFILE_SPEC			\
   "%{!shared:				\
      %{pg:gcrt0%O%s}			\
      %{!pg:				\
        %{p:mcrt0%O%s}			\
        %{!p:				\
 	 %{!static:crt0%O%s}		\
 	 %{static:scrt0%O%s}}}}"

 /* Provide a LINK_SPEC appropriate for NetBSD a.out.  Here we provide
    support for the special GCC options -static, -assert, and -nostdlib.  */

 #undef LINK_SPEC
 #define LINK_SPEC			\
   "%{nostdlib:-nostdlib}		\
    %{!shared:				\
      %{!nostdlib:			\
        %{!r*:				\
 	 %{!e*:-e start}}}		\
      -dc -dp				\
      %{static:-Bstatic}}		\
    %{shared:-Bshareable}		\
    %{R*}				\
    %{assert*}"


 /* Some imports from svr4.h in support of shared libraries.  */

 /* Define the strings used for the .type, .size, and .set directives.
    These strings generally do not vary from one system running NetBSD
    to another, but if a given system needs to use different pseudo-op
    names for these, they may be overridden in the file included after
    this one.  */

 #undef TYPE_ASM_OP
 #undef SIZE_ASM_OP
 #undef SET_ASM_OP
 #define TYPE_ASM_OP	"\t.type\t"
 #define SIZE_ASM_OP	"\t.size\t"
 #define SET_ASM_OP	"\t.set\t"


 /* This is how we tell the assembler that a symbol is weak.  */

 #undef ASM_WEAKEN_LABEL
 #define ASM_WEAKEN_LABEL(FILE,NAME)					\
   do 									\
     {									\
       fputs ("\t.globl\t", FILE); assemble_name (FILE, NAME);		\
       fputc ('\n', FILE);						\
       fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME);		\
       fputc ('\n', FILE);						\
     }									\
   while (0)


 /* The following macro defines the format used to output the second
    operand of the .type assembler directive.  Different svr4 assemblers
    expect various different forms of this operand.  The one given here
    is just a default.  You may need to override it in your machine-
    specific tm.h file (depending on the particulars of your assembler).  */

 #undef TYPE_OPERAND_FMT
 #define TYPE_OPERAND_FMT	"@%s"


 /* Write the extra assembler code needed to declare a function's result.
    Most svr4 assemblers don't require any special declaration of the
    result value, but there are exceptions.  */

 #ifndef ASM_DECLARE_RESULT
 #define ASM_DECLARE_RESULT(FILE, RESULT)
 #endif


 /* These macros generate the special .type and .size directives which
    are used to set the corresponding fields of the linker symbol table
    entries in an ELF object file under SVR4 (and a.out on NetBSD).
    These macros also output the starting labels for the relevant
    functions/objects.  */

 /* Write the extra assembler code needed to declare a function properly.
    Some svr4 assemblers need to also have something extra said about the
    function's return value.  We allow for that here.  */

 #undef ASM_DECLARE_FUNCTION_NAME
 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)			\
   do									\
     {									\
       fprintf (FILE, "%s", TYPE_ASM_OP);				\
       assemble_name (FILE, NAME);					\
       putc (',', FILE);							\
       fprintf (FILE, TYPE_OPERAND_FMT, "function");			\
       putc ('\n', FILE);						\
       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));			\
       ASM_OUTPUT_LABEL(FILE, NAME);					\
     }									\
   while (0)


 /* Write the extra assembler code needed to declare an object properly.  */

 #undef ASM_DECLARE_OBJECT_NAME
 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
   do									\
     {									\
       fprintf (FILE, "%s", TYPE_ASM_OP);				\
       assemble_name (FILE, NAME);					\
       putc (',', FILE);							\
       fprintf (FILE, TYPE_OPERAND_FMT, "object");			\
       putc ('\n', FILE);						\
       size_directive_output = 0;					\
       if (!flag_inhibit_size_directive && DECL_SIZE (DECL))		\
 	{								\
 	  size_directive_output = 1;					\
 	  fprintf (FILE, "%s", SIZE_ASM_OP);				\
 	  assemble_name (FILE, NAME);					\
 	  fprintf (FILE, ",%d\n",					\
 	           int_size_in_bytes (TREE_TYPE (DECL)));		\
 	}								\
       ASM_OUTPUT_LABEL(FILE, NAME);					\
     }									\
   while (0)


 /* Output the size directive for a decl in rest_of_decl_compilation
    in the case where we did not do so before the initializer.
    Once we find the error_mark_node, we know that the value of
    size_directive_output was set
    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */

 #undef ASM_FINISH_DECLARE_OBJECT
 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)	\
   do									\
     {									\
       const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);		\
       if (!flag_inhibit_size_directive && DECL_SIZE (DECL)		\
 	  && ! AT_END && TOP_LEVEL					\
 	  && DECL_INITIAL (DECL) == error_mark_node			\
 	  && !size_directive_output)					\
 	{								\
 	  size_directive_output = 1;					\
 	  fprintf (FILE, "%s", SIZE_ASM_OP);				\
 	  assemble_name (FILE, name);					\
 	  fprintf (FILE, ",%d\n",					\
 		   int_size_in_bytes (TREE_TYPE (DECL)));		\
 	}								\
     }									\
   while (0)


 /* This is how to declare the size of a function.  */

 #undef ASM_DECLARE_FUNCTION_SIZE
 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)			\
   do									\
     {									\
       if (!flag_inhibit_size_directive)					\
 	{								\
 	  char label[256];						\
 	  static int labelno;						\
 	  labelno++;							\
 	  ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);		\
 	  ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);		\
 	  fprintf (FILE, "%s", SIZE_ASM_OP);				\
 	  assemble_name (FILE, (FNAME));				\
 	  fprintf (FILE, ",");						\
 	  assemble_name (FILE, label);					\
 	  fprintf (FILE, "-");						\
 	  assemble_name (FILE, (FNAME));				\
 	  putc ('\n', FILE);						\
 	}								\
     }									\
   while (0)
	/* Common configuration file for NetBSD a.out targets.
	Copyright (C) 2002 Free Software Foundation, Inc.
	Contributed by Wasabi Systems, 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. */

	/* This defines which switch letters take arguments. */

	#undef SWITCH_TAKES_ARG
	#define SWITCH_TAKES_ARG(CHAR) \
	(DEFAULT_SWITCH_TAKES_ARG(CHAR) \
	\|\| (CHAR) == 'R')


	/* Provide an ASM_SPEC appropriate for NetBSD. Currently we only deal
	with the options for generating PIC code. */

	#undef ASM_SPEC
	#define ASM_SPEC " %\| %{fpic:-k} %{fPIC:-k -K}"


	/* Provide a STARTFILE_SPEC appropriate for NetBSD a.out. Here we
	provide support for the special GCC option -static. */

	#undef STARTFILE_SPEC
	#define STARTFILE_SPEC \
	"%{!shared: \
	%{pg:gcrt0%O%s} \
	%{!pg: \
	%{p:mcrt0%O%s} \
	%{!p: \
	%{!static:crt0%O%s} \
	%{static:scrt0%O%s}}}}"

	/* Provide a LINK_SPEC appropriate for NetBSD a.out. Here we provide
	support for the special GCC options -static, -assert, and -nostdlib. */

	#undef LINK_SPEC
	#define LINK_SPEC \
	"%{nostdlib:-nostdlib} \
	%{!shared: \
	%{!nostdlib: \
	%{!r*: \
	%{!e*:-e start}}} \
	-dc -dp \
	%{static:-Bstatic}} \
	%{shared:-Bshareable} \
	%{R*} \
	%{assert*}"


	/* Some imports from svr4.h in support of shared libraries. */

	/* Define the strings used for the .type, .size, and .set directives.
	These strings generally do not vary from one system running NetBSD
	to another, but if a given system needs to use different pseudo-op
	names for these, they may be overridden in the file included after
	this one. */

	#undef TYPE_ASM_OP
	#undef SIZE_ASM_OP
	#undef SET_ASM_OP
	#define TYPE_ASM_OP "\t.type\t"
	#define SIZE_ASM_OP "\t.size\t"
	#define SET_ASM_OP "\t.set\t"


	/* This is how we tell the assembler that a symbol is weak. */

	#undef ASM_WEAKEN_LABEL
	#define ASM_WEAKEN_LABEL(FILE,NAME) \
	do \
	{ \
	fputs ("\t.globl\t", FILE); assemble_name (FILE, NAME); \
	fputc ('\n', FILE); \
	fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
	fputc ('\n', FILE); \
	} \
	while (0)


	/* The following macro defines the format used to output the second
	operand of the .type assembler directive. Different svr4 assemblers
	expect various different forms of this operand. The one given here
	is just a default. You may need to override it in your machine-
	specific tm.h file (depending on the particulars of your assembler). */

	#undef TYPE_OPERAND_FMT
	#define TYPE_OPERAND_FMT "@%s"


	/* Write the extra assembler code needed to declare a function's result.
	Most svr4 assemblers don't require any special declaration of the
	result value, but there are exceptions. */

	#ifndef ASM_DECLARE_RESULT
	#define ASM_DECLARE_RESULT(FILE, RESULT)
	#endif


	/* These macros generate the special .type and .size directives which
	are used to set the corresponding fields of the linker symbol table
	entries in an ELF object file under SVR4 (and a.out on NetBSD).
	These macros also output the starting labels for the relevant
	functions/objects. */

	/* Write the extra assembler code needed to declare a function properly.
	Some svr4 assemblers need to also have something extra said about the
	function's return value. We allow for that here. */

	#undef ASM_DECLARE_FUNCTION_NAME
	#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
	do \
	{ \
	fprintf (FILE, "%s", TYPE_ASM_OP); \
	assemble_name (FILE, NAME); \
	putc (',', FILE); \
	fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
	putc ('\n', FILE); \
	ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
	ASM_OUTPUT_LABEL(FILE, NAME); \
	} \
	while (0)


	/* Write the extra assembler code needed to declare an object properly. */

	#undef ASM_DECLARE_OBJECT_NAME
	#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
	do \
	{ \
	fprintf (FILE, "%s", TYPE_ASM_OP); \
	assemble_name (FILE, NAME); \
	putc (',', FILE); \
	fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
	putc ('\n', FILE); \
	size_directive_output = 0; \
	if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
	{ \
	size_directive_output = 1; \
	fprintf (FILE, "%s", SIZE_ASM_OP); \
	assemble_name (FILE, NAME); \
	fprintf (FILE, ",%d\n", \
	int_size_in_bytes (TREE_TYPE (DECL))); \
	} \
	ASM_OUTPUT_LABEL(FILE, NAME); \
	} \
	while (0)


	/* Output the size directive for a decl in rest_of_decl_compilation
	in the case where we did not do so before the initializer.
	Once we find the error_mark_node, we know that the value of
	size_directive_output was set
	by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */

	#undef ASM_FINISH_DECLARE_OBJECT
	#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
	do \
	{ \
	const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
	if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
	&& ! AT_END && TOP_LEVEL \
	&& DECL_INITIAL (DECL) == error_mark_node \
	&& !size_directive_output) \
	{ \
	size_directive_output = 1; \
	fprintf (FILE, "%s", SIZE_ASM_OP); \
	assemble_name (FILE, name); \
	fprintf (FILE, ",%d\n", \
	int_size_in_bytes (TREE_TYPE (DECL))); \
	} \
	} \
	while (0)


	/* This is how to declare the size of a function. */

	#undef ASM_DECLARE_FUNCTION_SIZE
	#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
	do \
	{ \
	if (!flag_inhibit_size_directive) \
	{ \
	char label[256]; \
	static int labelno; \
	labelno++; \
	ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
	ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
	fprintf (FILE, "%s", SIZE_ASM_OP); \
	assemble_name (FILE, (FNAME)); \
	fprintf (FILE, ","); \
	assemble_name (FILE, label); \
	fprintf (FILE, "-"); \
	assemble_name (FILE, (FNAME)); \
	putc ('\n', FILE); \
	} \
	} \
	while (0)