llvm-gcc-4.2/gcc/config/m68k/m68kelf.h - llvm-archive - Git at Google

 /* m68kelf support, derived from m68kv4.h */

 /* Target definitions for GNU compiler for mc680x0 running System V.4
    Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004
    Free Software Foundation, Inc.

    Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com).

 This file is part of GCC.

 GCC 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.

 GCC 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 GCC; see the file COPYING.  If not, write to
 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */


 #ifndef SWBEG_ASM_OP
 #define SWBEG_ASM_OP "\t.swbeg\t"
 #endif

 /* Here are four prefixes that are used by asm_fprintf to
    facilitate customization for alternate assembler syntaxes.
    Machines with no likelihood of an alternate syntax need not
    define these and need not use asm_fprintf.  */

 /* The prefix for register names.  Note that REGISTER_NAMES
    is supposed to include this prefix. Also note that this is NOT an
    fprintf format string, it is a literal string */

 #undef REGISTER_PREFIX
 #define REGISTER_PREFIX "%"

 /* The prefix for local (compiler generated) labels.
    These labels will not appear in the symbol table.  */

 #undef LOCAL_LABEL_PREFIX
 #define LOCAL_LABEL_PREFIX "."

 /* The prefix to add to user-visible assembler symbols.  */

 #undef USER_LABEL_PREFIX
 #define USER_LABEL_PREFIX ""

 /* The prefix for immediate operands.  */

 #undef  IMMEDIATE_PREFIX
 #define IMMEDIATE_PREFIX "#"

 /* In the machine description we can't use %R, because it will not be seen
    by ASM_FPRINTF.  (Isn't that a design bug?).  */

 #undef REGISTER_PREFIX_MD
 #define REGISTER_PREFIX_MD "%%"

 /* config/m68k.md has an explicit reference to the program counter,
    prefix this by the register prefix.  */

 #define ASM_RETURN_CASE_JUMP				\
   do {							\
     if (TARGET_COLDFIRE)				\
       {							\
 	if (ADDRESS_REG_P (operands[0]))		\
 	  return "jmp %%pc@(2,%0:l)";			\
 	else						\
 	  return "ext%.l %0\n\tjmp %%pc@(2,%0:l)";	\
       }							\
     else						\
       return "jmp %%pc@(2,%0:w)";			\
   } while (0)

 /* This is how to output an assembler line that says to advance the
    location counter to a multiple of 2**LOG bytes.  */

 #undef ASM_OUTPUT_ALIGN
 #define ASM_OUTPUT_ALIGN(FILE,LOG)				\
 do {								\
   if ((LOG) > 0)						\
     fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG));	\
 } while (0)

 /* Use proper assembler syntax for these macros.  */
 #undef ASM_OUTPUT_REG_PUSH
 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
   asm_fprintf (FILE, "\t%Omove.l %s,-(%Rsp)\n", reg_names[REGNO])

 #undef ASM_OUTPUT_REG_POP
 #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
   asm_fprintf (FILE, "\t%Omove.l (%Rsp)+,%s\n", reg_names[REGNO])

 /*  Override the definition of NO_DOLLAR_IN_LABEL in svr4.h, for special
     g++ assembler names.  When this is defined, g++ uses embedded '.'
     characters and some m68k assemblers have problems with this.  The
     chances are much greater that any particular assembler will permit
     embedded '$' characters.  */

 #undef NO_DOLLAR_IN_LABEL

 /* Define PCC_STATIC_STRUCT_RETURN if the convention on the target machine
    is to use the nonreentrant technique for returning structure and union
    values, as commonly implemented by the AT&T Portable C Compiler (PCC).
    When defined, the gcc option -fpcc-struct-return can be used to cause
    this form to be generated.  When undefined, the option does nothing.
    For m68k SVR4, the convention is to use a reentrant technique compatible
    with the gcc default, so override the definition of this macro in m68k.h */

 #undef PCC_STATIC_STRUCT_RETURN

 /* Local common symbols are declared to the assembler with ".lcomm" rather
    than ".bss", so override the definition in svr4.h */

 #undef BSS_ASM_OP
 #define BSS_ASM_OP	"\t.lcomm\t"

 /* Register in which address to store a structure value is passed to a
    function.  The default in m68k.h is a1.  For m68k/SVR4 it is a0.  */

 #undef M68K_STRUCT_VALUE_REGNUM
 #define M68K_STRUCT_VALUE_REGNUM 8

 #define ASM_COMMENT_START "|"

 /* Define how the m68k registers should be numbered for Dwarf output.
    The numbering provided here should be compatible with the native
    SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7
    are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23.  */

 #undef DBX_REGISTER_NUMBER
 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)

 /* The ASM_OUTPUT_SKIP macro is first defined in m68k.h, using ".skip".
    It is then overridden by m68k/sgs.h to use ".space", and again by svr4.h
    to use ".zero".  The m68k/SVR4 assembler uses ".space", so repeat the
    definition from m68k/sgs.h here.  Note that ASM_NO_SKIP_IN_TEXT is
    defined in m68k/sgs.h, so we don't have to repeat it here.  */

 #undef ASM_OUTPUT_SKIP
 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
   fprintf (FILE, "%s%u\n", SPACE_ASM_OP, (int)(SIZE))

 #if 0
 /* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for
    1 byte alignment. Don't generate alignment for COMMON seems to be
    safer until we the assembler is fixed.  */
 #undef ASM_OUTPUT_ALIGNED_COMMON
 /* Same problem with this one.  */
 #undef ASM_OUTPUT_ALIGNED_LOCAL
 #endif

 /* The `string' directive on m68k svr4 does not handle string with
    escape char (i.e., `\') right. Use normal way to output ASCII bytes
    seems to be safer.  */
 #undef ASM_OUTPUT_ASCII
 #define ASM_OUTPUT_ASCII(FILE,PTR,LEN)				\
 do {								\
   register int sp = 0, ch;					\
   fputs (integer_asm_op (1, TRUE), (FILE));			\
   do {								\
     ch = (PTR)[sp];						\
     if (ch > ' ' && ! (ch & 0x80) && ch != '\\')		\
       {								\
 	fprintf ((FILE), "'%c", ch);				\
       }								\
     else							\
       {								\
 	fprintf ((FILE), "0x%x", ch);				\
       }								\
     if (++sp < (LEN))						\
       {								\
 	if ((sp % 10) == 0)					\
 	  {							\
 	    fprintf ((FILE), "\n%s", integer_asm_op (1, TRUE));	\
 	  }							\
 	else							\
 	  {							\
 	    putc (',', (FILE));					\
 	  }							\
       }								\
   } while (sp < (LEN));						\
   putc ('\n', (FILE));						\
 } while (0)

 #undef ASM_OUTPUT_COMMON
 #undef ASM_OUTPUT_LOCAL
 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
 ( fputs (".comm ", (FILE)),			\
   assemble_name ((FILE), (NAME)),		\
   fprintf ((FILE), ",%u\n", (int)(SIZE)))

 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
 ( fputs (".lcomm ", (FILE)),			\
   assemble_name ((FILE), (NAME)),		\
   fprintf ((FILE), ",%u\n", (int)(SIZE)))

 /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
    keep switch tables in the text section.  */

 #define JUMP_TABLES_IN_TEXT_SECTION 1

 /* Override the definition in svr4.h. In m68k svr4, using swbeg is the
    standard way to do switch table.  */
 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE)		\
   fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1));
 /* end of stuff from m68kv4.h */

 #undef ENDFILE_SPEC
 #define ENDFILE_SPEC "crtend.o%s"

 #undef	STARTFILE_SPEC
 #define STARTFILE_SPEC "crtbegin.o%s"

 /* If defined, a C expression whose value is a string containing the
    assembler operation to identify the following data as
    uninitialized global data.  If not defined, and neither
    `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
    uninitialized global data will be output in the data section if
    `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
    used.  */
 #ifndef BSS_SECTION_ASM_OP
 #define BSS_SECTION_ASM_OP	"\t.section\t.bss"
 #endif

 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
    separate, explicit argument.  If you define this macro, it is used
    in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
    handling the required alignment of the variable.  The alignment is
    specified as the number of bits.

    Try to use function `asm_output_aligned_bss' defined in file
    `varasm.c' when defining this macro.  */
 #ifndef ASM_OUTPUT_ALIGNED_BSS
 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 #endif
	/* m68kelf support, derived from m68kv4.h */

	/* Target definitions for GNU compiler for mc680x0 running System V.4
	Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004
	Free Software Foundation, Inc.

	Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com).

	This file is part of GCC.

	GCC 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.

	GCC 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 GCC; see the file COPYING. If not, write to
	the Free Software Foundation, 51 Franklin Street, Fifth Floor,
	Boston, MA 02110-1301, USA. */


	#ifndef SWBEG_ASM_OP
	#define SWBEG_ASM_OP "\t.swbeg\t"
	#endif

	/* Here are four prefixes that are used by asm_fprintf to
	facilitate customization for alternate assembler syntaxes.
	Machines with no likelihood of an alternate syntax need not
	define these and need not use asm_fprintf. */

	/* The prefix for register names. Note that REGISTER_NAMES
	is supposed to include this prefix. Also note that this is NOT an
	fprintf format string, it is a literal string */

	#undef REGISTER_PREFIX
	#define REGISTER_PREFIX "%"

	/* The prefix for local (compiler generated) labels.
	These labels will not appear in the symbol table. */

	#undef LOCAL_LABEL_PREFIX
	#define LOCAL_LABEL_PREFIX "."

	/* The prefix to add to user-visible assembler symbols. */

	#undef USER_LABEL_PREFIX
	#define USER_LABEL_PREFIX ""

	/* The prefix for immediate operands. */

	#undef IMMEDIATE_PREFIX
	#define IMMEDIATE_PREFIX "#"

	/* In the machine description we can't use %R, because it will not be seen
	by ASM_FPRINTF. (Isn't that a design bug?). */

	#undef REGISTER_PREFIX_MD
	#define REGISTER_PREFIX_MD "%%"

	/* config/m68k.md has an explicit reference to the program counter,
	prefix this by the register prefix. */

	#define ASM_RETURN_CASE_JUMP \
	do { \
	if (TARGET_COLDFIRE) \
	{ \
	if (ADDRESS_REG_P (operands[0])) \
	return "jmp %%pc@(2,%0:l)"; \
	else \
	return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
	} \
	else \
	return "jmp %%pc@(2,%0:w)"; \
	} while (0)

	/* This is how to output an assembler line that says to advance the
	location counter to a multiple of 2*LOG bytes. /

	#undef ASM_OUTPUT_ALIGN
	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
	do { \
	if ((LOG) > 0) \
	fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \
	} while (0)

	/* Use proper assembler syntax for these macros. */
	#undef ASM_OUTPUT_REG_PUSH
	#define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
	asm_fprintf (FILE, "\t%Omove.l %s,-(%Rsp)\n", reg_names[REGNO])

	#undef ASM_OUTPUT_REG_POP
	#define ASM_OUTPUT_REG_POP(FILE,REGNO) \
	asm_fprintf (FILE, "\t%Omove.l (%Rsp)+,%s\n", reg_names[REGNO])

	/* Override the definition of NO_DOLLAR_IN_LABEL in svr4.h, for special
	g++ assembler names. When this is defined, g++ uses embedded '.'
	characters and some m68k assemblers have problems with this. The
	chances are much greater that any particular assembler will permit
	embedded '$' characters. */

	#undef NO_DOLLAR_IN_LABEL

	/* Define PCC_STATIC_STRUCT_RETURN if the convention on the target machine
	is to use the nonreentrant technique for returning structure and union
	values, as commonly implemented by the AT&T Portable C Compiler (PCC).
	When defined, the gcc option -fpcc-struct-return can be used to cause
	this form to be generated. When undefined, the option does nothing.
	For m68k SVR4, the convention is to use a reentrant technique compatible
	with the gcc default, so override the definition of this macro in m68k.h */

	#undef PCC_STATIC_STRUCT_RETURN

	/* Local common symbols are declared to the assembler with ".lcomm" rather
	than ".bss", so override the definition in svr4.h */

	#undef BSS_ASM_OP
	#define BSS_ASM_OP "\t.lcomm\t"

	/* Register in which address to store a structure value is passed to a
	function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */

	#undef M68K_STRUCT_VALUE_REGNUM
	#define M68K_STRUCT_VALUE_REGNUM 8

	#define ASM_COMMENT_START "\|"

	/* Define how the m68k registers should be numbered for Dwarf output.
	The numbering provided here should be compatible with the native
	SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7
	are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23. */

	#undef DBX_REGISTER_NUMBER
	#define DBX_REGISTER_NUMBER(REGNO) (REGNO)

	/* The ASM_OUTPUT_SKIP macro is first defined in m68k.h, using ".skip".
	It is then overridden by m68k/sgs.h to use ".space", and again by svr4.h
	to use ".zero". The m68k/SVR4 assembler uses ".space", so repeat the
	definition from m68k/sgs.h here. Note that ASM_NO_SKIP_IN_TEXT is
	defined in m68k/sgs.h, so we don't have to repeat it here. */

	#undef ASM_OUTPUT_SKIP
	#define ASM_OUTPUT_SKIP(FILE,SIZE) \
	fprintf (FILE, "%s%u\n", SPACE_ASM_OP, (int)(SIZE))

	#if 0
	/* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for
	1 byte alignment. Don't generate alignment for COMMON seems to be
	safer until we the assembler is fixed. */
	#undef ASM_OUTPUT_ALIGNED_COMMON
	/* Same problem with this one. */
	#undef ASM_OUTPUT_ALIGNED_LOCAL
	#endif

	/* The `string' directive on m68k svr4 does not handle string with
	escape char (i.e., `\') right. Use normal way to output ASCII bytes
	seems to be safer. */
	#undef ASM_OUTPUT_ASCII
	#define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \
	do { \
	register int sp = 0, ch; \
	fputs (integer_asm_op (1, TRUE), (FILE)); \
	do { \
	ch = (PTR)[sp]; \
	if (ch > ' ' && ! (ch & 0x80) && ch != '\\') \
	{ \
	fprintf ((FILE), "'%c", ch); \
	} \
	else \
	{ \
	fprintf ((FILE), "0x%x", ch); \
	} \
	if (++sp < (LEN)) \
	{ \
	if ((sp % 10) == 0) \
	{ \
	fprintf ((FILE), "\n%s", integer_asm_op (1, TRUE)); \
	} \
	else \
	{ \
	putc (',', (FILE)); \
	} \
	} \
	} while (sp < (LEN)); \
	putc ('\n', (FILE)); \
	} while (0)

	#undef ASM_OUTPUT_COMMON
	#undef ASM_OUTPUT_LOCAL
	#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
	( fputs (".comm ", (FILE)), \
	assemble_name ((FILE), (NAME)), \
	fprintf ((FILE), ",%u\n", (int)(SIZE)))

	#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
	( fputs (".lcomm ", (FILE)), \
	assemble_name ((FILE), (NAME)), \
	fprintf ((FILE), ",%u\n", (int)(SIZE)))

	/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
	keep switch tables in the text section. */

	#define JUMP_TABLES_IN_TEXT_SECTION 1

	/* Override the definition in svr4.h. In m68k svr4, using swbeg is the
	standard way to do switch table. */
	#undef ASM_OUTPUT_BEFORE_CASE_LABEL
	#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
	fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1));
	/* end of stuff from m68kv4.h */

	#undef ENDFILE_SPEC
	#define ENDFILE_SPEC "crtend.o%s"

	#undef STARTFILE_SPEC
	#define STARTFILE_SPEC "crtbegin.o%s"

	/* If defined, a C expression whose value is a string containing the
	assembler operation to identify the following data as
	uninitialized global data. If not defined, and neither
	`ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
	uninitialized global data will be output in the data section if
	`-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
	used. */
	#ifndef BSS_SECTION_ASM_OP
	#define BSS_SECTION_ASM_OP "\t.section\t.bss"
	#endif

	/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
	separate, explicit argument. If you define this macro, it is used
	in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
	handling the required alignment of the variable. The alignment is
	specified as the number of bits.

	Try to use function `asm_output_aligned_bss' defined in file
	`varasm.c' when defining this macro. */
	#ifndef ASM_OUTPUT_ALIGNED_BSS
	#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
	asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
	#endif