linux.h   [plain text]

/* Definitions for Linux for S/390.
   Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
                  Ulrich Weigand (uweigand@de.ibm.com).

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.  */

#ifndef _LINUX_H
#define _LINUX_H

/* Target specific version string.  */

#ifdef DEFAULT_TARGET_64BIT
#undef  TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (Linux for zSeries)");
#else
#undef  TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (Linux for S/390)");
#endif


/* Target specific type definitions.  */

/* ??? Do we really want long as size_t on 31-bit?  */
#undef  SIZE_TYPE
#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "long unsigned int")
#undef  PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")

#undef  WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef  WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32


/* Target specific preprocessor settings.  */

#define NO_BUILTIN_SIZE_TYPE
#define NO_BUILTIN_PTRDIFF_TYPE

#define CPP_PREDEFINES \
  "-Dunix -Asystem(unix) -D__gnu_linux__ -Dlinux -Asystem(linux) -D__ELF__ \
   -Acpu(s390) -Amachine(s390) -D__s390__"

#define CPP_ARCH31_SPEC \
  "-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=int"
#define CPP_ARCH64_SPEC \
  "-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int \
   -D__s390x__ -D__LONG_MAX__=9223372036854775807L"

#ifdef DEFAULT_TARGET_64BIT
#undef  CPP_SPEC
#define CPP_SPEC "%{m31:%(cpp_arch31)} %{!m31:%(cpp_arch64)}"
#else
#undef  CPP_SPEC
#define CPP_SPEC "%{m64:%(cpp_arch64)} %{!m64:%(cpp_arch31)}"
#endif


/* Target specific compiler settings.  */

/* ??? -fcaller-saves sometimes doesn't work.  Fix this! */
#undef  CC1_SPEC
#define CC1_SPEC "-fno-caller-saves"
#undef  CC1PLUS_SPEC
#define CC1PLUS_SPEC "-fno-caller-saves"


/* Target specific assembler settings.  */

#ifdef DEFAULT_TARGET_64BIT
#undef  ASM_SPEC
#define ASM_SPEC "%{m31:-m31 -Aesa}"
#else
#undef  ASM_SPEC
#define ASM_SPEC "%{m64:-m64 -Aesame}"
#endif


/* Target specific linker settings.  */

#define LINK_ARCH31_SPEC \
  "-m elf_s390 \
   %{shared:-shared} \
   %{!shared: \
      %{static:-static} \
      %{!static: \
	%{rdynamic:-export-dynamic} \
	%{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"

#define LINK_ARCH64_SPEC \
  "-m elf64_s390 \
   %{shared:-shared} \
   %{!shared: \
      %{static:-static} \
      %{!static: \
	%{rdynamic:-export-dynamic} \
	%{!dynamic-linker:-dynamic-linker /lib/ld64.so.1}}}"

#ifdef DEFAULT_TARGET_64BIT
#undef  LINK_SPEC
#define LINK_SPEC "%{m31:%(link_arch31)} %{!m31:%(link_arch64)}"
#else
#undef  LINK_SPEC
#define LINK_SPEC "%{m64:%(link_arch64)} %{!m64:%(link_arch31)}"
#endif


/* This macro defines names of additional specifications to put in the specs
   that can be used in various specifications like CC1_SPEC.  Its definition
   is an initializer with a subgrouping for each command option.  */

#define EXTRA_SPECS \
  { "cpp_arch31",	CPP_ARCH31_SPEC },	\
  { "cpp_arch64",	CPP_ARCH64_SPEC },	\
  { "link_arch31",	LINK_ARCH31_SPEC },	\
  { "link_arch64",	LINK_ARCH64_SPEC },	\


/* Character to start a comment.  */

#define ASM_COMMENT_START "#"


/* Assembler pseudos to introduce constants of various size.  */

#define ASM_DOUBLE "\t.double"

/* The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
#define LOCAL_LABEL_PREFIX "."

/* Prefix for internally generated assembler labels.  */
#define LPREFIX ".L"


/* 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)     \
  (assemble_name (FILE, NAME), fputs (":\n", FILE))

/* Store in OUTPUT a string (made with alloca) containing
   an assembler-name for a local static variable named NAME.
   LABELNO is an integer which is different for each call.  */

#undef ASM_FORMAT_PRIVATE_NAME
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)  \
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),    \
  sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))


     /* internal macro to output long */
#define _ASM_OUTPUT_LONG(FILE, VALUE)                                   \
      fprintf (FILE, "\t.long\t0x%lX\n", VALUE);


/* This is how to output an element of a case-vector that is absolute.  */

#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  			\
  fprintf (FILE, "%s%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
	   LPREFIX, VALUE)

/* This is how to output an element of a case-vector that is relative.  */

#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) 		\
  fprintf (FILE, "%s%s%d-%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
	   LPREFIX, VALUE, LPREFIX, REL)



/* 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)	\
    if ((LOG)!=0) fprintf ((FILE), "\t.align\t%d\n", 1<<(LOG))

/* This is how to output an assembler line
   that says to advance the location counter by SIZE bytes.  */

#undef ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE, SIZE)  \
  fprintf ((FILE), "\t.set\t.,.+%u\n", (SIZE))

/* This is how to output assembler code to declare an
   uninitialized external linkage data object.  */

#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)

/* Output before read-only data.  */

#define TEXT_SECTION_ASM_OP ".text"

/* Output before writable (initialized) data.  */

#define DATA_SECTION_ASM_OP ".data"

/* Output before writable (uninitialized) data.  */

#define BSS_SECTION_ASM_OP ".bss"

/* This is how to output a command to make the user-level label named NAME
   defined for reference from other files.  */

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

/* Select section for constant in constant pool. 
   We are in the right section. 
   undef for 64 bit mode (linux64.h).
 */

#undef SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(MODE, X, ALIGN)


/* Output code to add DELTA to the first argument, and then jump to FUNCTION.
   Used for C++ multiple inheritance.  */
#define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION)              \
do {                                                                          \
  if (TARGET_64BIT)                                                           \
    {                                                                         \
      if (flag_pic)                                                           \
        {                                                                     \
          fprintf (FILE, "\tlarl  1,0f\n");                                   \
          fprintf (FILE, "\tagf   %d,0(1)\n",                                 \
                   aggregate_value_p (TREE_TYPE                               \
                                      (TREE_TYPE (FUNCTION))) ? 3 :2 );       \
          fprintf (FILE, "\tlarl  1,");                                       \
          assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
          fprintf (FILE, "@GOTENT\n");                                        \
          fprintf (FILE, "\tlg    1,0(1)\n");                                 \
          fprintf (FILE, "\tbr    1\n");                                      \
          fprintf (FILE, "0:\t.long  ");	                              \
          fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
          fprintf (FILE, "\n");			                              \
        }                                                                     \
      else                                                                    \
        {                                                                     \
          fprintf (FILE, "\tlarl  1,0f\n");                                   \
          fprintf (FILE, "\tagf   %d,0(1)\n",                                 \
          aggregate_value_p (TREE_TYPE                                        \
                             (TREE_TYPE (FUNCTION))) ? 3 :2 );                \
          fprintf (FILE, "\tjg  ");                                           \
          assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
          fprintf (FILE, "\n");                                               \
          fprintf (FILE, "0:\t.long  ");		                      \
          fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
          fprintf (FILE, "\n");			                              \
        }                                                                     \
    }                                                                         \
  else                                                                        \
    {                                                                         \
      if (flag_pic)                                                           \
        {                                                                     \
          fprintf (FILE, "\tbras  1,0f\n");                                   \
          fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_-.\n");                \
          fprintf (FILE, "\t.long  ");                                        \
          assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
          fprintf (FILE, "@GOT\n");                                           \
          fprintf (FILE, "\t.long  ");		                              \
          fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
          fprintf (FILE, "\n");			                              \
          fprintf (FILE, "0:\tal  %d,8(1)\n",                                 \
                   aggregate_value_p (TREE_TYPE                               \
                                      (TREE_TYPE (FUNCTION))) ? 3 : 2 );      \
          fprintf (FILE, "\tl     0,4(1)\n");                                 \
          fprintf (FILE, "\tal    1,0(1)\n");                                 \
          fprintf (FILE, "\talr   1,0\n");                                    \
          fprintf (FILE, "\tl     1,0(1)\n");                                 \
          fprintf (FILE, "\tbr    1\n");                                      \
        } else {                                                              \
          fprintf (FILE, "\tbras  1,0f\n");                                   \
          fprintf (FILE, "\t.long  ");                                        \
          assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
          fprintf (FILE, "-.\n");                                             \
          fprintf (FILE, "\t.long  ");		                              \
          fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
          fprintf (FILE, "\n");			                              \
          fprintf (FILE, "0:\tal  %d,4(1)\n",                                 \
                   aggregate_value_p (TREE_TYPE                               \
                                      (TREE_TYPE (FUNCTION))) ? 3 : 2 );      \
          fprintf (FILE, "\tal    1,0(1)\n");                                 \
          fprintf (FILE, "\tbr    1\n");                                      \
       }                                                                      \
    }                                                                         \
} while (0)

#endif