pa-linux.h

gcc3.2.1源代码

/* Definitions for PA_RISC with ELF format
   Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

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.  */

/* Wide characters are signed.  */
#undef WCHAR_UNSIGNED
#define WCHAR_UNSIGNED 0

/* Use DWARF2 debugging info and unwind.  */
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
#define DWARF2_ASM_LINE_DEBUG_INFO 1
#define DWARF2_UNWIND_INFO 1

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-D__ELF__ -Dunix -D__hppa__ -D__gnu_linux__ -Dlinux -Asystem=unix -Asystem=posix -Acpu=hppa -Amachine=hppa -Amachine=bigendian"

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

#undef ASM_SPEC
#define ASM_SPEC \
  "%{v:-V} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"

/* Define this for shared library support because it isn't in the main
   linux.h file.  */

#undef LINK_SPEC
#define LINK_SPEC "\
  %{shared:-shared} \
  %{!shared: \
    %{!static: \
      %{rdynamic:-export-dynamic} \
      %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
      %{static:-static}}"

/* Sibcalls, stubs, and elf sections don't play well.  */
#undef FUNCTION_OK_FOR_SIBCALL
#define FUNCTION_OK_FOR_SIBCALL(x) 0

/* glibc's profiling functions don't need gcc to allocate counters.  */
#define NO_PROFILE_COUNTERS 1

/* Put plabels into the data section so we can relocate them.  */
#undef SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(MODE,RTX,ALIGN)	\
  if (flag_pic && function_label_operand (RTX, MODE))	\
    data_section ();					\
  else							\
    readonly_data_section ();

/* A C expression whose value is RTL representing the location of the
   incoming return address at the beginning of any function, before the
   prologue.  */
#define INCOMING_RETURN_ADDR_RTX  (gen_rtx_REG (word_mode, 2))
#define DWARF_FRAME_RETURN_COLUMN (DWARF_FRAME_REGNUM (2))

/* Define the strings used for the special svr4 .type and .size directives.
   These strings generally do not vary from one system running svr4 to
   another, but if a given system (e.g. m88k running svr) needs to use
   different pseudo-op names for these, they may be overridden in the
   file which includes this one.  */

#undef STRING_ASM_OP
#define STRING_ASM_OP   ".stringz"

#define TEXT_SECTION_ASM_OP "\t.text"
#define DATA_SECTION_ASM_OP "\t.data"
#define BSS_SECTION_ASM_OP "\t.section\t.bss"

/* Output at beginning of assembler file.  We override the definition
   from <linux.h> so that we can get the proper .LEVEL directive.  */
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
  do								\
    {								\
      if (write_symbols != NO_DEBUG)				\
	{							\
	  output_file_directive (FILE, main_input_filename);	\
	  fputs ("\t.version\t\"01.01\"\n", FILE);		\
	}							\
      if (TARGET_64BIT)						\
	fputs("\t.LEVEL 2.0w\n", FILE);				\
      else if (TARGET_PA_20)					\
	fputs("\t.LEVEL 2.0\n", FILE);				\
      else if (TARGET_PA_11)					\
	fputs("\t.LEVEL 1.1\n", FILE);				\
      else							\
	fputs("\t.LEVEL 1.0\n", FILE);				\
      if (profile_flag)						\
	fputs ("\t.IMPORT _mcount, CODE\n", FILE);		\
    }								\
   while (0)

/* Output a definition */
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
  do								\
    {								\
      fprintf ((FILE), "\t%s\t", SET_ASM_OP);			\
      assemble_name (FILE, LABEL1);				\
      fprintf (FILE, ",");					\
      assemble_name (FILE, LABEL2);				\
      fprintf (FILE, "\n");					\
    }								\
  while (0)

/* We want local labels to start with period if made with asm_fprintf.  */
#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."

/* Define these to generate the Linux/ELF/SysV style of internal
   labels all the time - i.e. to be compatible with
   ASM_GENERATE_INTERNAL_LABEL in <elfos.h>.  Compare these with the
   ones in pa.h and note the lack of dollar signs in these.  FIXME:
   shouldn't we fix pa.h to use ASM_GENERATE_INTERNAL_LABEL instead? */

#undef ASM_OUTPUT_ADDR_VEC_ELT
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
  if (TARGET_BIG_SWITCH)					\
    fprintf (FILE, "\tstw %%r1,-16(%%r30)\n\tldil LR'.L%d,%%r1\n\tbe RR'.L%d(%%sr4,%%r1)\n\tldw -16(%%r30),%%r1\n", VALUE, VALUE);		\
  else								\
    fprintf (FILE, "\tb .L%d\n\tnop\n", VALUE)

#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
  if (TARGET_BIG_SWITCH)					\
    fprintf (FILE, "\tstw %%r1,-16(%%r30)\n\tldw T'.L%d(%%r19),%%r1\n\tbv %%r0(%%r1)\n\tldw -16(%%r30),%%r1\n", VALUE);				\
  else								\
    fprintf (FILE, "\tb .L%d\n\tnop\n", VALUE)

/* This is how to output the definition of a user-level label named NAME,
   such as the label on a static function or variable NAME.  */

#undef ASM_OUTPUT_LABEL
#define ASM_OUTPUT_LABEL(FILE, NAME) \
  do								\
    {								\
      assemble_name (FILE, NAME);				\
      fputs (":\n", FILE);					\
    }								\
  while (0)

/* NOTE: ASM_OUTPUT_INTERNAL_LABEL() is defined for us by elfos.h, and
   does what we want (i.e. uses colons).  It must be compatible with
   ASM_GENERATE_INTERNAL_LABEL(), so do not define it here.  */

#undef ASM_GLOBALIZE_LABEL
#define ASM_GLOBALIZE_LABEL(FILE, NAME) \
  (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))

/* FIXME: Hacked from the <elfos.h> one so that we avoid multiple
   labels in a function declaration (since pa.c seems determined to do
   it differently)  */

#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)		\
  do								\
    {								\
      fprintf (FILE, "\t%s\t ", 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));		\
    }								\
  while (0)

/* Linux always uses gas.  */
#undef TARGET_GAS
#define TARGET_GAS 1