sysv4.h

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

  if ((LOG) != 0)							\
    {									\
      if ((MAX_SKIP) == 0)						\
	fprintf ((FILE), "\t.p2align %d\n", (LOG));			\
      else								\
	fprintf ((FILE), "\t.p2align %d,,%d\n",	(LOG), (MAX_SKIP));	\
    }
#endif

/* This is how to output code to push a register on the stack.
   It need not be very fast code.

   On the rs6000, we must keep the backchain up to date.  In order
   to simplify things, always allocate 16 bytes for a push (System V
   wants to keep stack aligned to a 16 byte boundary).  */

#define	ASM_OUTPUT_REG_PUSH(FILE, REGNO)				\
do {									\
  if (DEFAULT_ABI == ABI_V4)						\
    asm_fprintf (FILE,							\
		 "\t{stu|stwu} %s,-16(%s)\n\t{st|stw} %s,12(%s)\n",	\
		 reg_names[1], reg_names[1], reg_names[REGNO],		\
		 reg_names[1]);						\
} while (0)

/* This is how to output an insn to pop a register from the stack.
   It need not be very fast code.  */

#define	ASM_OUTPUT_REG_POP(FILE, REGNO)					\
do {									\
  if (DEFAULT_ABI == ABI_V4)						\
    asm_fprintf (FILE,							\
		 "\t{l|lwz} %s,12(%s)\n\t{ai|addic} %s,%s,16\n",	\
		 reg_names[REGNO], reg_names[1], reg_names[1],		\
		 reg_names[1]);						\
} while (0)

/* Switch  Recognition by gcc.c.  Add -G xx support.  */

/* Override svr4.h definition.  */
#undef	SWITCH_TAKES_ARG
#define	SWITCH_TAKES_ARG(CHAR)						\
  ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o'			\
   || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u'			\
   || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x'			\
   || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V'			\
   || (CHAR) == 'B' || (CHAR) == 'b' || (CHAR) == 'G')

extern int fixuplabelno;

/* Handle constructors specially for -mrelocatable.  */
#define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor

/* This is the end of what might become sysv4.h.  */

/* Use DWARF 2 debugging information by default.  */
#undef  PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG

/* Historically we have also supported stabs debugging.  */
#define DBX_DEBUGGING_INFO 1

#define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)

/* Map register numbers held in the call frame info that gcc has
   collected using DWARF_FRAME_REGNUM to those that should be output in
   .debug_frame and .eh_frame.  We continue to use gcc hard reg numbers
   for .eh_frame, but use the numbers mandated by the various ABIs for
   .debug_frame.  rs6000_emit_prologue has translated any combination of
   CR2, CR3, CR4 saves to a save of CR2.  The actual code emitted saves
   the whole of CR, so we map CR2_REGNO to the DWARF reg for CR.  */
#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH)	\
  ((FOR_EH) ? (REGNO)				\
   : (REGNO) == CR2_REGNO ? 64			\
   : DBX_REGISTER_NUMBER (REGNO))

#define TARGET_ENCODE_SECTION_INFO  rs6000_elf_encode_section_info
#define TARGET_IN_SMALL_DATA_P  rs6000_elf_in_small_data_p
#define TARGET_SECTION_TYPE_FLAGS  rs6000_elf_section_type_flags

/* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */

#define	RS6000_OUTPUT_BASENAME(FILE, NAME)	\
    assemble_name (FILE, NAME)

/* We have to output the stabs for the function name *first*, before
   outputting its label.  */

#define	DBX_FUNCTION_FIRST

/* This is the end of what might become sysv4dbx.h.  */

#ifndef	TARGET_VERSION
#define	TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
#endif

#define TARGET_OS_SYSV_CPP_BUILTINS()		\
  do						\
    {						\
      if (flag_pic == 1)			\
	{					\
	  builtin_define ("__pic__=1");		\
	  builtin_define ("__PIC__=1");		\
	}					\
      else if (flag_pic == 2)			\
	{					\
	  builtin_define ("__pic__=2");		\
	  builtin_define ("__PIC__=2");		\
	}					\
      if (target_flags_explicit			\
	  & MASK_RELOCATABLE)			\
	builtin_define ("_RELOCATABLE");	\
    }						\
  while (0)

#ifndef	TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS()		\
  do						\
    {						\
      builtin_define_std ("PPC");		\
      builtin_define_std ("unix");		\
      builtin_define ("__svr4__");		\
      builtin_assert ("system=unix");		\
      builtin_assert ("system=svr4");		\
      builtin_assert ("cpu=powerpc");		\
      builtin_assert ("machine=powerpc");	\
      TARGET_OS_SYSV_CPP_BUILTINS ();		\
    }						\
  while (0)
#endif

/* Pass various options to the assembler.  */
/* Override svr4.h definition.  */
#undef	ASM_SPEC
#define	ASM_SPEC "%(asm_cpu) \
%{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
%{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \
%{memb|msdata|msdata=eabi: -memb} \
%{mlittle|mlittle-endian:-mlittle; \
  mbig|mbig-endian      :-mbig;    \
  mcall-aixdesc |		   \
  mcall-freebsd |		   \
  mcall-netbsd  |		   \
  mcall-openbsd |		   \
  mcall-linux   |		   \
  mcall-gnu             :-mbig;    \
  mcall-i960-old        :-mlittle}"

#define	CC1_ENDIAN_BIG_SPEC ""

#define	CC1_ENDIAN_LITTLE_SPEC "\
%{!mstrict-align: %{!mno-strict-align: \
    %{!mcall-i960-old: \
	-mstrict-align \
    } \
}}"

#define	CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"

/* Pass -G xxx to the compiler and set correct endian mode.  */
#define	CC1_SPEC "%{G*} \
%{mlittle|mlittle-endian: %(cc1_endian_little);           \
  mbig   |mbig-endian   : %(cc1_endian_big);              \
  mcall-aixdesc |					  \
  mcall-freebsd |					  \
  mcall-netbsd  |					  \
  mcall-openbsd |					  \
  mcall-linux   |					  \
  mcall-gnu             : -mbig %(cc1_endian_big);        \
  mcall-i960-old        : -mlittle %(cc1_endian_little);  \
                        : %(cc1_endian_default)}          \
%{mno-sdata: -msdata=none } \
%{meabi: %{!mcall-*: -mcall-sysv }} \
%{!meabi: %{!mno-eabi: \
    %{mrelocatable: -meabi } \
    %{mcall-freebsd: -mno-eabi } \
    %{mcall-i960-old: -meabi } \
    %{mcall-linux: -mno-eabi } \
    %{mcall-gnu: -mno-eabi } \
    %{mcall-netbsd: -mno-eabi } \
    %{mcall-openbsd: -mno-eabi }}} \
%{msdata: -msdata=default} \
%{mno-sdata: -msdata=none} \
%{profile: -p}"

/* Don't put -Y P,<path> for cross compilers.  */
#ifndef CROSS_COMPILE
#define LINK_PATH_SPEC "\
%{!R*:%{L*:-R %*}} \
%{!nostdlib: %{!YP,*: \
    %{compat-bsd: \
	%{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
	%{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}} \
	%{!R*: %{!L*: -R /usr/ucblib}} \
    %{!compat-bsd: \
	%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
	%{!p:-Y P,/usr/ccs/lib:/usr/lib}}}}"

#else
#define LINK_PATH_SPEC ""
#endif

/* Default starting address if specified.  */
#define LINK_START_SPEC "\
%{mads         : %(link_start_ads)         ; \
  myellowknife : %(link_start_yellowknife) ; \
  mmvme        : %(link_start_mvme)        ; \
  msim         : %(link_start_sim)         ; \
  mwindiss     : %(link_start_windiss)     ; \
  mcall-freebsd: %(link_start_freebsd)     ; \
  mcall-linux  : %(link_start_linux)       ; \
  mcall-gnu    : %(link_start_gnu)         ; \
  mcall-netbsd : %(link_start_netbsd)      ; \
  mcall-openbsd: %(link_start_openbsd)     ; \
               : %(link_start_default)     }"

#define LINK_START_DEFAULT_SPEC ""

/* Override svr4.h definition.  */
#undef	LINK_SPEC
#define	LINK_SPEC "\
%{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
%{YP,*} %{R*} \
%{Qy:} %{!Qn:-Qy} \
%(link_shlib) \
%{!Wl,-T*: %{!T*: %(link_start) }} \
%(link_target) \
%(link_os)"

/* For now, turn off shared libraries by default.  */
#ifndef SHARED_LIB_SUPPORT
#define NO_SHARED_LIB_SUPPORT
#endif

#ifndef NO_SHARED_LIB_SUPPORT
/* Shared libraries are default.  */
#define LINK_SHLIB_SPEC "\
%{!static: %(link_path) %{!R*:%{L*:-R %*}}} \
%{mshlib: } \
%{static:-dn -Bstatic} \
%{shared:-G -dy -z text} \
%{symbolic:-Bsymbolic -G -dy -z text}"

#else
/* Shared libraries are not default.  */
#define LINK_SHLIB_SPEC "\
%{mshlib: %(link_path) } \
%{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
%{static: } \
%{shared:-G -dy -z text %(link_path) } \
%{symbolic:-Bsymbolic -G -dy -z text %(link_path) }"
#endif

/* Override the default target of the linker.  */
#define	LINK_TARGET_SPEC "\
%{mlittle: --oformat elf32-powerpcle } %{mlittle-endian: --oformat elf32-powerpcle } \
%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
    %{mcall-i960-old: --oformat elf32-powerpcle} \
  }}}}"

/* Any specific OS flags.  */
#define LINK_OS_SPEC "\
%{mads         : %(link_os_ads)         ; \
  myellowknife : %(link_os_yellowknife) ; \
  mmvme        : %(link_os_mvme)        ; \
  msim         : %(link_os_sim)         ; \
  mwindiss     : %(link_os_windiss)     ; \
  mcall-freebsd: %(link_os_freebsd)     ; \
  mcall-linux  : %(link_os_linux)       ; \
  mcall-gnu    : %(link_os_gnu)         ; \
  mcall-netbsd : %(link_os_netbsd)      ; \
  mcall-openbsd: %(link_os_openbsd)     ; \
               : %(link_os_default)     }"

#define LINK_OS_DEFAULT_SPEC ""

/* Override rs6000.h definition.  */
#undef	CPP_SPEC
#define	CPP_SPEC "%{posix: -D_POSIX_SOURCE} \
%{mads         : %(cpp_os_ads)         ; \
  myellowknife : %(cpp_os_yellowknife) ; \
  mmvme        : %(cpp_os_mvme)        ; \
  msim         : %(cpp_os_sim)         ; \
  mwindiss     : %(cpp_os_windiss)     ; \
  mcall-freebsd: %(cpp_os_freebsd)     ; \
  mcall-linux  : %(cpp_os_linux)       ; \
  mcall-gnu    : %(cpp_os_gnu)         ; \
  mcall-netbsd : %(cpp_os_netbsd)      ; \
  mcall-openbsd: %(cpp_os_openbsd)     ; \
               : %(cpp_os_default)     }"

#define	CPP_OS_DEFAULT_SPEC ""

/* Override svr4.h definition.  */
#undef	STARTFILE_SPEC
#define	STARTFILE_SPEC "\
%{mads         : %(startfile_ads)         ; \
  myellowknife : %(startfile_yellowknife) ; \
  mmvme        : %(startfile_mvme)        ; \
  msim         : %(startfile_sim)         ; \
  mwindiss     : %(startfile_windiss)     ; \
  mcall-freebsd: %(startfile_freebsd)     ; \
  mcall-linux  : %(startfile_linux)       ; \
  mcall-gnu    : %(startfile_gnu)         ; \
  mcall-netbsd : %(startfile_netbsd)      ; \
  mcall-openbsd: %(startfile_openbsd)     ; \
               : %(startfile_default)     }"

#define	STARTFILE_DEFAULT_SPEC ""

/* Override svr4.h definition.  */
#undef	LIB_SPEC
#define	LIB_SPEC "\
%{mads         : %(lib_ads)         ; \
  myellowknife : %(lib_yellowknife) ; \
  mmvme        : %(lib_mvme)        ; \
  msim         : %(lib_sim)         ; \
  mwindiss     : %(lib_windiss)     ; \
  mcall-freebsd: %(lib_freebsd)     ; \
  mcall-linux  : %(lib_linux)       ; \
  mcall-gnu    : %(lib_gnu)         ; \
  mcall-netbsd : %(lib_netbsd)      ; \
  mcall-openbsd: %(lib_openbsd)     ; \
               : %(lib_default)     }"

#define LIB_DEFAULT_SPEC ""

/* Override svr4.h definition.  */
#undef	ENDFILE_SPEC
#define	ENDFILE_SPEC "\
%{mads         : crtsavres.o%s        %(endfile_ads)         ; \
  myellowknife : crtsavres.o%s        %(endfile_yellowknife) ; \
  mmvme        : crtsavres.o%s        %(endfile_mvme)        ; \
  msim         : crtsavres.o%s        %(endfile_sim)         ; \
  mwindiss     :                      %(endfile_windiss)     ; \
  mcall-freebsd: crtsavres.o%s        %(endfile_freebsd)     ; \
  mcall-linux  : crtsavres.o%s        %(endfile_linux)       ; \
  mcall-gnu    : crtsavres.o%s        %(endfile_gnu)         ; \
  mcall-netbsd : crtsavres.o%s        %(endfile_netbsd)      ; \
  mcall-openbsd: crtsavres.o%s        %(endfile_openbsd)     ; \
               : %(crtsavres_default) %(endfile_default)     }"

#define CRTSAVRES_DEFAULT_SPEC "crtsavres.o%s"