sysv4.h

gcc3.2.1源代码

   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,							\
		 (TARGET_32BIT						\
		  ? "\t{stu|stwu} %s,-16(%s)\n\t{st|stw} %s,12(%s)\n"	\
		  : "\tstdu %s,-32(%s)\n\tstd %s,24(%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,							\
		 (TARGET_32BIT						\
		  ? "\t{l|lwz} %s,12(%s)\n\t{ai|addic} %s,%s,16\n"	\
		  : "\tld %s,24(%s)\n\t{ai|addic} %s,%s,32\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')

/* Output .file.  */
/* Override elfos.h definition.  */
#undef	ASM_FILE_START
#define	ASM_FILE_START(FILE)						\
do {									\
  output_file_directive ((FILE), main_input_filename);			\
  rs6000_file_start (FILE, TARGET_CPU_DEFAULT);				\
} while (0)


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

/* If we are referencing a function that is static or is known to be
   in this file, make the SYMBOL_REF special.  We can use this to indicate
   that we can branch to this function without emitting a no-op after the
   call.  For real AIX calling sequences, we also replace the
   function name with the real name (1 or 2 leading .'s), rather than
   the function descriptor name.  This saves a lot of overriding code
   to read the prefixes.  */

#undef	ENCODE_SECTION_INFO
#define	ENCODE_SECTION_INFO(DECL) rs6000_encode_section_info (DECL)

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

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

/* This macro gets just the user-specified name
   out of the string in a SYMBOL_REF.  Discard
   a leading * or @.  */
#define	STRIP_NAME_ENCODING(VAR,SYMBOL_NAME)				\
do {									\
  const char *_name = SYMBOL_NAME;					\
  while (*_name == '*' || *_name == '@')				\
    _name++;								\
  (VAR) = _name;							\
} while (0)

/* This is how to output a reference to a user-level label named NAME.
   `assemble_name' uses this.  */

/* Override elfos.h definition.  */
#undef	ASM_OUTPUT_LABELREF
#define	ASM_OUTPUT_LABELREF(FILE,NAME)		\
do {						\
  const char *_name = NAME;			\
  if (*_name == '@')				\
    _name++;					\
 						\
  if (*_name == '*')				\
    fprintf (FILE, "%s", _name + 1);		\
  else						\
    asm_fprintf (FILE, "%U%s", _name);		\
} while (0)

/* But, to make this work, we have to output the stabs for the function
   name *first*...  */

#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

#ifndef	CPP_PREDEFINES
#define	CPP_PREDEFINES \
  "-DPPC -Dunix -D__svr4__ -Asystem=unix -Asystem=svr4 -Acpu=powerpc -Amachine=powerpc"
#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:-K PIC} %{fPIC:-K PIC} \
%{memb} %{!memb: %{msdata: -memb} %{msdata=eabi: -memb}} \
%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian} \
%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
    %{mcall-freebsd: -mbig} \
    %{mcall-i960-old: -mlittle} \
    %{mcall-linux: -mbig} \
    %{mcall-gnu: -mbig} \
    %{mcall-netbsd: -mbig} \
}}}}"

#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: %(cc1_endian_little)} %{!mlittle: %{mlittle-endian: %(cc1_endian_little)}} \
%{mbig: %(cc1_endian_big)} %{!mbig: %{mbig-endian: %(cc1_endian_big)}} \
%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
    %{mcall-aixdesc: -mbig %(cc1_endian_big) } \
    %{mcall-freebsd: -mbig %(cc1_endian_big) } \
    %{mcall-i960-old: -mlittle %(cc1_endian_little) } \
    %{mcall-linux: -mbig %(cc1_endian_big) } \
    %{mcall-gnu: -mbig %(cc1_endian_big) } \
    %{mcall-netbsd: -mbig %(cc1_endian_big) } \
    %{!mcall-aixdesc: %{!mcall-freebsd: %{!mcall-i960-old: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: \
	    %(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 }}} \
%{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) } \
%{mcall-freebsd: %(link_start_freebsd) } \
%{mcall-linux: %(link_start_linux) } \
%{mcall-gnu: %(link_start_gnu) } \
%{mcall-netbsd: %(link_start_netbsd) } \
%{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-linux: %{!mcall-gnu: \
	%{!mcall-netbsd: %{!mcall-freebsd: %(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) } \
%{mcall-freebsd: %(link_os_freebsd) } \
%{mcall-linux: %(link_os_linux) } \
%{mcall-gnu: %(link_os_gnu) } \
%{mcall-netbsd: %(link_os_netbsd) } \
%{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(link_os_default) }}}}}}}}"

#define LINK_OS_DEFAULT_SPEC ""

#define CPP_SYSV_SPEC \
"%{mrelocatable*: -D_RELOCATABLE} \
%{fpic: -D__PIC__=1 -D__pic__=1} \
%{!fpic: %{fPIC: -D__PIC__=2 -D__pic__=2}} \
%{mlong-double-128: -D__LONG_DOUBLE_128__=1} \
%{!mlong-double-64: %(cpp_longdouble_default)} \
%{mcall-sysv: -D_CALL_SYSV} \
%{mcall-aix: -D_CALL_AIX} %{mcall-aixdesc: -D_CALL_AIX -D_CALL_AIXDESC} \
%{!mcall-sysv: %{!mcall-aix: %{!mcall-aixdesc: %(cpp_sysv_default) }}} \
%{msoft-float: -D_SOFT_FLOAT} \
%{!msoft-float: %{!mhard-float: \
    %{mcpu=401: -D_SOFT_FLOAT} \
    %{mcpu=403: -D_SOFT_FLOAT} \
    %{mcpu=405: -D_SOFT_FLOAT} \
    %{mcpu=ec603e: -D_SOFT_FLOAT} \
    %{mcpu=801: -D_SOFT_FLOAT} \
    %{mcpu=821: -D_SOFT_FLOAT} \
    %{mcpu=823: -D_SOFT_FLOAT} \
    %{mcpu=860: -D_SOFT_FLOAT} \
    %{!mcpu*: %(cpp_float_default) }}}"

/* Whether floating point is disabled by default.  */
#define	CPP_FLOAT_DEFAULT_SPEC ""

/* Whether 'long double' is 128 bits by default.  */
#define	CPP_LONGDOUBLE_DEFAULT_SPEC ""

#define	CPP_SYSV_DEFAULT_SPEC "-D_CALL_SYSV"

#define CPP_ENDIAN_BIG_SPEC "-D_BIG_ENDIAN -D__BIG_ENDIAN__ -Amachine=bigendian"

#define CPP_ENDIAN_LITTLE_SPEC "-D_LITTLE_ENDIAN -D__LITTLE_ENDIAN__ -Amachine=littleendian"

#define	CPP_ENDIAN_SPEC \
"%{mlittle: %(cpp_endian_little) } \
%{mlittle-endian: %(cpp_endian_little) } \
%{mbig: %(cpp_endian_big) } \
%{mbig-endian: %(cpp_endian_big) } \
%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
    %{mcall-freebsd: %(cpp_endian_big) } \
    %{mcall-linux: %(cpp_endian_big) } \
    %{mcall-gnu: %(cpp_endian_big) } \
    %{mcall-netbsd: %(cpp_endian_big) } \
    %{mcall-i960-old: %(cpp_endian_little) } \
    %{mcall-aixdesc:  %(cpp_endian_big) } \
    %{!mcall-linux: %{!mcall-gnu: %{!mcall-freebsd: %{!mcall-netbsd: %{!mcall-aixdesc: %(cpp_endian_default) }}}}}}}}}"

#define	CPP_ENDIAN_DEFAULT_SPEC "%(cpp_endian_big)"

/* Override rs6000.h definition.  */
#undef	CPP_SPEC
#define	CPP_SPEC "%{posix: -D_POSIX_SOURCE} %(cpp_sysv) %(cpp_endian) %(cpp_cpu) \
%{mads: %(cpp_os_ads) } \
%{myellowknife: %(cpp_os_yellowknife) } \
%{mmvme: %(cpp_os_mvme) } \
%{msim: %(cpp_os_sim) } \
%{mcall-freebsd: %(cpp_os_freebsd) } \
%{mcall-linux: %(cpp_os_linux) } \
%{mcall-gnu: %(cpp_os_gnu) } \
%{mcall-netbsd: %(cpp_os_netbsd) } \
%{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(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) } \
%{mcall-freebsd: %(startfile_freebsd) } \
%{mcall-linux: %(startfile_linux) } \
%{mcall-gnu: %(startfile_gnu) } \
%{mcall-netbsd: %(startfile_netbsd) } \
%{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(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) } \
%{mcall-freebsd: %(lib_freebsd) } \
%{mcall-linux: %(lib_linux) } \
%{mcall-gnu: %(lib_gnu) } \
%{mcall-netbsd: %(lib_netbsd) } \
%{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(lib_default) }}}}}}}}"

#define LIB_DEFAULT_SPEC ""

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

#define	ENDFILE_DEFAULT_SPEC ""

/* Motorola ADS support.  */
#define LIB_ADS_SPEC "--start-group -lads -lc --end-group"

#define	STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"

#define	ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"