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

 /* Definitions of target machine for GNU compiler.
    For ARM with ELF obj format.
    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
    Free Software Foundation, Inc.
    Contributed by Philip Blundell <philb@gnu.org> and
    Catherine Moore <clm@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.  */

 #ifndef OBJECT_FORMAT_ELF
  #error elf.h included before elfos.h
 #endif

 #ifndef LOCAL_LABEL_PREFIX
 #define LOCAL_LABEL_PREFIX "."
 #endif

 #ifndef SUBTARGET_CPP_SPEC
 #define SUBTARGET_CPP_SPEC  "-D__ELF__"
 #endif

 #ifndef SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS \
   { "subtarget_extra_asm_spec",	SUBTARGET_EXTRA_ASM_SPEC },
 #endif

 #ifndef SUBTARGET_EXTRA_ASM_SPEC
 #define SUBTARGET_EXTRA_ASM_SPEC ""
 #endif

 #ifndef ASM_SPEC
 #define ASM_SPEC "\
 %{mbig-endian:-EB} \
 %{mcpu=*:-m%*} \
 %{march=*:-m%*} \
 %{mapcs-*:-mapcs-%*} \
 %{mapcs-float:-mfloat} \
 %{msoft-float:-mno-fpu} \
 %{mthumb-interwork:-mthumb-interwork} \
 %(subtarget_extra_asm_spec)"
 #endif

 /* The ARM uses @ are a comment character so we need to redefine
    TYPE_OPERAND_FMT.  */
 #undef  TYPE_OPERAND_FMT
 #define TYPE_OPERAND_FMT	"%s"

 /* We might need a ARM specific header to function declarations.  */
 #undef  ASM_DECLARE_FUNCTION_NAME
 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)	\
   do							\
     {							\
       ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL);     \
       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)

 /* We might need an ARM specific trailer for function declarations.  */
 #undef  ASM_DECLARE_FUNCTION_SIZE
 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)		\
   do								\
     {								\
       ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL);		\
       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)

 /* 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 1

 #ifndef LINK_SPEC
 #define LINK_SPEC "%{mbig-endian:-EB} -X"
 #endif

 /* Run-time Target Specification.  */
 #ifndef TARGET_VERSION
 #define TARGET_VERSION fputs (" (ARM/elf)", stderr)
 #endif

 #ifndef TARGET_DEFAULT
 #define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
 #endif

 #ifndef MULTILIB_DEFAULTS
 #define MULTILIB_DEFAULTS \
   { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
 #endif


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

 /* Output an internal label definition.  */
 #undef  ASM_OUTPUT_INTERNAL_LABEL
 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM)  	\
   do								\
     {								\
       char * s = (char *) alloca (40 + strlen (PREFIX));	\
       extern int arm_target_label, arm_ccfsm_state;		\
       extern rtx arm_target_insn;				\
 								\
       if (arm_ccfsm_state == 3 && arm_target_label == (NUM)	\
 	  && !strcmp (PREFIX, "L"))				\
 	{							\
 	  arm_ccfsm_state = 0;					\
 	  arm_target_insn = NULL;				\
 	}							\
       ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM));		\
       ASM_OUTPUT_LABEL (STREAM, s);		                \
     }								\
   while (0)

 #undef  TARGET_ASM_NAMED_SECTION
 #define TARGET_ASM_NAMED_SECTION  arm_elf_asm_named_section

 #undef  ASM_OUTPUT_ALIGNED_COMMON
 #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGN)	\
   do								\
     {								\
       fprintf (STREAM, "\t.comm\t");				\
       assemble_name (STREAM, NAME);				\
       fprintf (STREAM, ", %d, %d\n", SIZE, ALIGN);		\
     }								\
   while (0)

 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs.  */
 #define NEED_PLT_RELOC	flag_pic
 #define NEED_GOT_RELOC	flag_pic

 /* The ELF assembler handles GOT addressing differently to NetBSD.  */
 #define GOT_PCREL	0

 /* Biggest alignment supported by the object file format of this
    machine.  Use this macro to limit the alignment which can be
    specified using the `__attribute__ ((aligned (N)))' construct.  If
    not defined, the default value is `BIGGEST_ALIGNMENT'.  */
 #define MAX_OFILE_ALIGNMENT (32768 * 8)

 /* Align output to a power of two.  Note ".align 0" is redundant,
    and also GAS will treat it as ".align 2" which we do not want.  */
 #define ASM_OUTPUT_ALIGN(STREAM, POWER)			\
   do							\
     {							\
       if ((POWER) > 0)					\
 	fprintf (STREAM, "\t.align\t%d\n", POWER);	\
     }							\
   while (0)

 #define SUPPORTS_INIT_PRIORITY 1
	/* Definitions of target machine for GNU compiler.
	For ARM with ELF obj format.
	Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
	Free Software Foundation, Inc.
	Contributed by Philip Blundell <philb@gnu.org> and
	Catherine Moore <clm@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. */

	#ifndef OBJECT_FORMAT_ELF
	#error elf.h included before elfos.h
	#endif

	#ifndef LOCAL_LABEL_PREFIX
	#define LOCAL_LABEL_PREFIX "."
	#endif

	#ifndef SUBTARGET_CPP_SPEC
	#define SUBTARGET_CPP_SPEC "-D__ELF__"
	#endif

	#ifndef SUBTARGET_EXTRA_SPECS
	#define SUBTARGET_EXTRA_SPECS \
	{ "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC },
	#endif

	#ifndef SUBTARGET_EXTRA_ASM_SPEC
	#define SUBTARGET_EXTRA_ASM_SPEC ""
	#endif

	#ifndef ASM_SPEC
	#define ASM_SPEC "\
	%{mbig-endian:-EB} \
	%{mcpu=:-m%} \
	%{march=:-m%} \
	%{mapcs-:-mapcs-%} \
	%{mapcs-float:-mfloat} \
	%{msoft-float:-mno-fpu} \
	%{mthumb-interwork:-mthumb-interwork} \
	%(subtarget_extra_asm_spec)"
	#endif

	/* The ARM uses @ are a comment character so we need to redefine
	TYPE_OPERAND_FMT. */
	#undef TYPE_OPERAND_FMT
	#define TYPE_OPERAND_FMT "%s"

	/* We might need a ARM specific header to function declarations. */
	#undef ASM_DECLARE_FUNCTION_NAME
	#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
	do \
	{ \
	ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \
	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)

	/* We might need an ARM specific trailer for function declarations. */
	#undef ASM_DECLARE_FUNCTION_SIZE
	#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
	do \
	{ \
	ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \
	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)

	/* 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 1

	#ifndef LINK_SPEC
	#define LINK_SPEC "%{mbig-endian:-EB} -X"
	#endif

	/* Run-time Target Specification. */
	#ifndef TARGET_VERSION
	#define TARGET_VERSION fputs (" (ARM/elf)", stderr)
	#endif

	#ifndef TARGET_DEFAULT
	#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT \| ARM_FLAG_APCS_32 \| ARM_FLAG_APCS_FRAME)
	#endif

	#ifndef MULTILIB_DEFAULTS
	#define MULTILIB_DEFAULTS \
	{ "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
	#endif


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

	/* Output an internal label definition. */
	#undef ASM_OUTPUT_INTERNAL_LABEL
	#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
	do \
	{ \
	char * s = (char *) alloca (40 + strlen (PREFIX)); \
	extern int arm_target_label, arm_ccfsm_state; \
	extern rtx arm_target_insn; \
	\
	if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \
	&& !strcmp (PREFIX, "L")) \
	{ \
	arm_ccfsm_state = 0; \
	arm_target_insn = NULL; \
	} \
	ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \
	ASM_OUTPUT_LABEL (STREAM, s); \
	} \
	while (0)

	#undef TARGET_ASM_NAMED_SECTION
	#define TARGET_ASM_NAMED_SECTION arm_elf_asm_named_section

	#undef ASM_OUTPUT_ALIGNED_COMMON
	#define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGN) \
	do \
	{ \
	fprintf (STREAM, "\t.comm\t"); \
	assemble_name (STREAM, NAME); \
	fprintf (STREAM, ", %d, %d\n", SIZE, ALIGN); \
	} \
	while (0)

	/* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */
	#define NEED_PLT_RELOC flag_pic
	#define NEED_GOT_RELOC flag_pic

	/* The ELF assembler handles GOT addressing differently to NetBSD. */
	#define GOT_PCREL 0

	/* Biggest alignment supported by the object file format of this
	machine. Use this macro to limit the alignment which can be
	specified using the `__attribute__ ((aligned (N)))' construct. If
	not defined, the default value is `BIGGEST_ALIGNMENT'. */
	#define MAX_OFILE_ALIGNMENT (32768 * 8)

	/* Align output to a power of two. Note ".align 0" is redundant,
	and also GAS will treat it as ".align 2" which we do not want. */
	#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
	do \
	{ \
	if ((POWER) > 0) \
	fprintf (STREAM, "\t.align\t%d\n", POWER); \
	} \
	while (0)

	#define SUPPORTS_INIT_PRIORITY 1