gcc/config/sparc/linux64.h - gcc - Git at Google

 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
    Copyright 1996, 1997, 1998 Free Software Foundation, Inc.
    Contributed by David S. Miller (davem@caip.rutgers.edu)

 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.  */

 /* ??? bi-architecture support will require changes to the linker
    related specs, among perhaps other things (multilibs).  */
 /* #define SPARC_BI_ARCH */

 #define LINUX_DEFAULT_ELF

 /* Don't assume anything about the header files. */
 #define NO_IMPLICIT_EXTERN_C

 #undef HAVE_ATEXIT
 #define HAVE_ATEXIT

 #include <sparc/sysv4.h>

 #undef MD_EXEC_PREFIX
 #undef MD_STARTFILE_PREFIX

 /* Output at beginning of assembler file.  */
 /* The .file command should always begin the output.  */
 #undef ASM_FILE_START
 #define ASM_FILE_START(FILE)                                            \
   do {                                                                  \
         output_file_directive (FILE, main_input_filename);              \
         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
   } while (0)

 #undef ASM_CPU_DEFAULT_SPEC
 #define ASM_CPU_DEFAULT_SPEC "-Av9a"

 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
    provides part of the support for getting C++ file-scope static
    object constructed before entering `main'. */

 #undef  STARTFILE_SPEC
 #define STARTFILE_SPEC \
   "%{!shared: \
      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"

 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
    the GNU/Linux magical crtend.o file (see crtstuff.c) which
    provides part of the support for getting C++ file-scope static
    object constructed before entering `main', followed by a normal
    GNU/Linux "finalizer" file, `crtn.o'.  */

 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC \
   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"

 #undef TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");

 /* A 64 bit v9 compiler with stack-bias,
    in a Medium/Anywhere code model environment.  */

 #undef TARGET_DEFAULT
 #define TARGET_DEFAULT \
   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_EPILOGUE + MASK_FPU)

 /* The default code model.  */
 #undef SPARC_DEFAULT_CMODEL
 #define SPARC_DEFAULT_CMODEL CM_MEDANY

 #undef WCHAR_TYPE
 #define WCHAR_TYPE "long int"

 #undef WCHAR_TYPE_SIZE
 #define WCHAR_TYPE_SIZE BITS_PER_WORD

 #undef LONG_DOUBLE_TYPE_SIZE
 #define LONG_DOUBLE_TYPE_SIZE 128

 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D_LONGLONG -Dsparc -D__sparc__ -Dlinux -Asystem(unix) -Asystem(posix)"

 #undef CPP_SUBTARGET_SPEC
 #define CPP_SUBTARGET_SPEC "\
 %{fPIC:-D__PIC__ -D__pic__} \
 %{fpic:-D__PIC__ -D__pic__} \
 %{posix:-D_POSIX_SOURCE} \
 %{pthread:-D_REENTRANT} \
 "

 #undef LIB_SPEC
 #define LIB_SPEC \
   "%{shared: -lc} \
    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
      %{profile:-lc_p} %{!profile: -lc}}"

 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
    for the special GCC options -static and -shared, which allow us to
    link things in one of these three modes by applying the appropriate
    combinations of options at link-time. We like to support here for
    as many of the other GNU linker options as possible. But I don't
    have the time to search for those flags. I am sure how to add
    support for -soname shared_object_name. H.J.

    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
    -Wl,-V.

    When the -shared link option is used a final link is not being
    done.  */

 /* If ELF is the default format, we should not use /lib/elf. */

 #undef  LINK_SPEC
 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib %{shared:-shared} \
   %{!shared: \
     %{!ibcs: \
       %{!static: \
         %{rdynamic:-export-dynamic} \
         %{!dynamic-linker:-dynamic-linker /lib/ld-linux64.so.2}} \
         %{static:-static}}} \
 %{mlittle-endian:-EL} \
 "

 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
    It's safe to pass -s always, even if -g is not used. */
 #undef ASM_SPEC
 #define ASM_SPEC "\
 %{V} \
 %{v:%{!V:-V}} \
 %{!Qn:-Qy} \
 %{n} \
 %{T} \
 %{Ym,*} \
 %{Wa,*:%*} \
 -s %{fpic:-K PIC} %{fPIC:-K PIC} \
 %{mlittle-endian:-EL} \
 %(asm_cpu) %(asm_arch) \
 "

 /* Same as sparc.h */
 #undef DBX_REGISTER_NUMBER
 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)

 /* System V Release 4 uses DWARF debugging info.  Buf DWARF1 doesn't do
    64-bit anything, so we use DWARF2.  */

 #undef DWARF2_DEBUGGING_INFO
 #undef DWARF_DEBUGGING_INFO
 #undef DBX_DEBUGGING_INFO
 #define DWARF2_DEBUGGING_INFO
 #define DBX_DEBUGGING_INFO

 #undef PREFERRED_DEBUGGING_TYPE
 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG

 #undef ASM_OUTPUT_ALIGNED_LOCAL
 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
 do {									\
   fputs ("\t.local\t", (FILE));		\
   assemble_name ((FILE), (NAME));					\
   putc ('\n', (FILE));							\
   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);			\
 } while (0)

 #undef COMMON_ASM_OP
 #define COMMON_ASM_OP "\t.common"

 /* This is how to output a definition of an internal numbered label where
    PREFIX is the class of label and NUM is the number within the class.  */

 #undef  ASM_OUTPUT_INTERNAL_LABEL
 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)

 /* This is how to output a reference to an internal numbered label where
    PREFIX is the class of label and NUM is the number within the class.  */

 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)	\
   fprintf (FILE, ".L%s%d", PREFIX, NUM)

 /* This is how to store into the string LABEL
    the symbol_ref name of an internal numbered label where
    PREFIX is the class of label and NUM is the number within the class.
    This is suitable for output with `assemble_name'.  */

 #undef  ASM_GENERATE_INTERNAL_LABEL
 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)

 /* Stabs doesn't use this, and it confuses a simulator.  */
 /* ??? Need to see what DWARF needs, if anything.  */
 #undef ASM_IDENTIFY_GCC
 #define ASM_IDENTIFY_GCC(FILE)

 /* Define the names of various pseudo-ops used by the Sparc/svr4 assembler.
    ??? If ints are 64 bits then UNALIGNED_INT_ASM_OP (defined elsewhere) is
    misnamed.  These should all refer to explicit sizes (half/word/xword?),
    anything other than short/int/long/etc.  */

 #define UNALIGNED_DOUBLE_INT_ASM_OP	".uaxword"

 /* DWARF bits.  */

 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
    Obviously the Dwarf2 folks havn't tried to actually build systems
    with their spec.  On a 64-bit system, only 64-bit relocs become
    RELATIVE relocations.  */

 /* #define DWARF_OFFSET_SIZE PTR_SIZE */

 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
    traps available which can get and set the condition codes
    reliably.  */
 #undef MACHINE_STATE_SAVE
 #define MACHINE_STATE_SAVE(ID)				\
   unsigned long int ms_flags, ms_saveret;		\
   asm volatile("ta	0x20\n\t"			\
 	       "mov	%%g1, %0\n\t"			\
 	       "mov	%%g2, %1\n\t"			\
 	       : "=r" (ms_flags), "=r" (ms_saveret));

 #undef MACHINE_STATE_RESTORE
 #define MACHINE_STATE_RESTORE(ID)			\
   asm volatile("mov	%0, %%g1\n\t"			\
 	       "mov	%1, %%g2\n\t"			\
 	       "ta	0x21\n\t"			\
 	       : /* no outputs */			\
 	       : "r" (ms_flags), "r" (ms_saveret));
	/* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
	Copyright 1996, 1997, 1998 Free Software Foundation, Inc.
	Contributed by David S. Miller (davem@caip.rutgers.edu)

	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. */

	/* ??? bi-architecture support will require changes to the linker
	related specs, among perhaps other things (multilibs). */
	/* #define SPARC_BI_ARCH */

	#define LINUX_DEFAULT_ELF

	/* Don't assume anything about the header files. */
	#define NO_IMPLICIT_EXTERN_C

	#undef HAVE_ATEXIT
	#define HAVE_ATEXIT

	#include <sparc/sysv4.h>

	#undef MD_EXEC_PREFIX
	#undef MD_STARTFILE_PREFIX

	/* Output at beginning of assembler file. */
	/* The .file command should always begin the output. */
	#undef ASM_FILE_START
	#define ASM_FILE_START(FILE) \
	do { \
	output_file_directive (FILE, main_input_filename); \
	fprintf (FILE, "\t.version\t\"01.01\"\n"); \
	} while (0)

	#undef ASM_CPU_DEFAULT_SPEC
	#define ASM_CPU_DEFAULT_SPEC "-Av9a"

	/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
	the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
	provides part of the support for getting C++ file-scope static
	object constructed before entering `main'. */

	#undef STARTFILE_SPEC
	#define STARTFILE_SPEC \
	"%{!shared: \
	%{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
	crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"

	/* Provide a ENDFILE_SPEC appropriate for GNU/Linux. Here we tack on
	the GNU/Linux magical crtend.o file (see crtstuff.c) which
	provides part of the support for getting C++ file-scope static
	object constructed before entering `main', followed by a normal
	GNU/Linux "finalizer" file, `crtn.o'. */

	#undef ENDFILE_SPEC
	#define ENDFILE_SPEC \
	"%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"

	#undef TARGET_VERSION
	#define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");

	/* A 64 bit v9 compiler with stack-bias,
	in a Medium/Anywhere code model environment. */

	#undef TARGET_DEFAULT
	#define TARGET_DEFAULT \
	(MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
	+ MASK_STACK_BIAS + MASK_APP_REGS + MASK_EPILOGUE + MASK_FPU)

	/* The default code model. */
	#undef SPARC_DEFAULT_CMODEL
	#define SPARC_DEFAULT_CMODEL CM_MEDANY

	#undef WCHAR_TYPE
	#define WCHAR_TYPE "long int"

	#undef WCHAR_TYPE_SIZE
	#define WCHAR_TYPE_SIZE BITS_PER_WORD

	#undef LONG_DOUBLE_TYPE_SIZE
	#define LONG_DOUBLE_TYPE_SIZE 128

	#undef CPP_PREDEFINES
	#define CPP_PREDEFINES "-D__ELF__ -Dunix -D_LONGLONG -Dsparc -D__sparc__ -Dlinux -Asystem(unix) -Asystem(posix)"

	#undef CPP_SUBTARGET_SPEC
	#define CPP_SUBTARGET_SPEC "\
	%{fPIC:-D__PIC__ -D__pic__} \
	%{fpic:-D__PIC__ -D__pic__} \
	%{posix:-D_POSIX_SOURCE} \
	%{pthread:-D_REENTRANT} \
	"

	#undef LIB_SPEC
	#define LIB_SPEC \
	"%{shared: -lc} \
	%{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
	%{profile:-lc_p} %{!profile: -lc}}"

	/* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support
	for the special GCC options -static and -shared, which allow us to
	link things in one of these three modes by applying the appropriate
	combinations of options at link-time. We like to support here for
	as many of the other GNU linker options as possible. But I don't
	have the time to search for those flags. I am sure how to add
	support for -soname shared_object_name. H.J.

	I took out %{v:%{!V:-V}}. It is too much :-(. They can use
	-Wl,-V.

	When the -shared link option is used a final link is not being
	done. */

	/* If ELF is the default format, we should not use /lib/elf. */

	#undef LINK_SPEC
	#define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib %{shared:-shared} \
	%{!shared: \
	%{!ibcs: \
	%{!static: \
	%{rdynamic:-export-dynamic} \
	%{!dynamic-linker:-dynamic-linker /lib/ld-linux64.so.2}} \
	%{static:-static}}} \
	%{mlittle-endian:-EL} \
	"

	/* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
	It's safe to pass -s always, even if -g is not used. */
	#undef ASM_SPEC
	#define ASM_SPEC "\
	%{V} \
	%{v:%{!V:-V}} \
	%{!Qn:-Qy} \
	%{n} \
	%{T} \
	%{Ym,*} \
	%{Wa,:%} \
	-s %{fpic:-K PIC} %{fPIC:-K PIC} \
	%{mlittle-endian:-EL} \
	%(asm_cpu) %(asm_arch) \
	"

	/* Same as sparc.h */
	#undef DBX_REGISTER_NUMBER
	#define DBX_REGISTER_NUMBER(REGNO) (REGNO)

	/* System V Release 4 uses DWARF debugging info. Buf DWARF1 doesn't do
	64-bit anything, so we use DWARF2. */

	#undef DWARF2_DEBUGGING_INFO
	#undef DWARF_DEBUGGING_INFO
	#undef DBX_DEBUGGING_INFO
	#define DWARF2_DEBUGGING_INFO
	#define DBX_DEBUGGING_INFO

	#undef PREFERRED_DEBUGGING_TYPE
	#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG

	#undef ASM_OUTPUT_ALIGNED_LOCAL
	#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
	do { \
	fputs ("\t.local\t", (FILE)); \
	assemble_name ((FILE), (NAME)); \
	putc ('\n', (FILE)); \
	ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
	} while (0)

	#undef COMMON_ASM_OP
	#define COMMON_ASM_OP "\t.common"

	/* This is how to output a definition of an internal numbered label where
	PREFIX is the class of label and NUM is the number within the class. */

	#undef ASM_OUTPUT_INTERNAL_LABEL
	#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
	fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)

	/* This is how to output a reference to an internal numbered label where
	PREFIX is the class of label and NUM is the number within the class. */

	#undef ASM_OUTPUT_INTERNAL_LABELREF
	#define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM) \
	fprintf (FILE, ".L%s%d", PREFIX, NUM)

	/* This is how to store into the string LABEL
	the symbol_ref name of an internal numbered label where
	PREFIX is the class of label and NUM is the number within the class.
	This is suitable for output with `assemble_name'. */

	#undef ASM_GENERATE_INTERNAL_LABEL
	#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
	sprintf (LABEL, "*.L%s%d", PREFIX, NUM)

	/* Stabs doesn't use this, and it confuses a simulator. */
	/* ??? Need to see what DWARF needs, if anything. */
	#undef ASM_IDENTIFY_GCC
	#define ASM_IDENTIFY_GCC(FILE)

	/* Define the names of various pseudo-ops used by the Sparc/svr4 assembler.
	??? If ints are 64 bits then UNALIGNED_INT_ASM_OP (defined elsewhere) is
	misnamed. These should all refer to explicit sizes (half/word/xword?),
	anything other than short/int/long/etc. */

	#define UNALIGNED_DOUBLE_INT_ASM_OP ".uaxword"

	/* DWARF bits. */

	/* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
	Obviously the Dwarf2 folks havn't tried to actually build systems
	with their spec. On a 64-bit system, only 64-bit relocs become
	RELATIVE relocations. */

	/* #define DWARF_OFFSET_SIZE PTR_SIZE */

	/* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
	traps available which can get and set the condition codes
	reliably. */
	#undef MACHINE_STATE_SAVE
	#define MACHINE_STATE_SAVE(ID) \
	unsigned long int ms_flags, ms_saveret; \
	asm volatile("ta 0x20\n\t" \
	"mov %%g1, %0\n\t" \
	"mov %%g2, %1\n\t" \
	: "=r" (ms_flags), "=r" (ms_saveret));

	#undef MACHINE_STATE_RESTORE
	#define MACHINE_STATE_RESTORE(ID) \
	asm volatile("mov %0, %%g1\n\t" \
	"mov %1, %%g2\n\t" \
	"ta 0x21\n\t" \
	: /* no outputs */ \
	: "r" (ms_flags), "r" (ms_saveret));