gcc/config/s390/linux.h

   1 /* Definitions for Linux for S/390.
   2    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Hartmut Penner (hpenner@de.ibm.com) and
   4                   Ulrich Weigand (uweigand@de.ibm.com).
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef _LINUX_H
  24 #define _LINUX_H
  25
  26 /* Target specific version string.  */
  27
  28 #ifdef DEFAULT_TARGET_64BIT
  29 #undef  TARGET_VERSION
  30 #define TARGET_VERSION fprintf (stderr, " (Linux for zSeries)");
  31 #else
  32 #undef  TARGET_VERSION
  33 #define TARGET_VERSION fprintf (stderr, " (Linux for S/390)");
  34 #endif
  35
  36
  37 /* Target specific type definitions.  */
  38
  39 /* ??? Do we really want long as size_t on 31-bit?  */
  40 #undef  SIZE_TYPE
  41 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "long unsigned int")
  42 #undef  PTRDIFF_TYPE
  43 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
  44
  45 #undef  WCHAR_TYPE
  46 #define WCHAR_TYPE "int"
  47 #undef  WCHAR_TYPE_SIZE
  48 #define WCHAR_TYPE_SIZE 32
  49
  50
  51 /* Target specific preprocessor settings.  */
  52
  53 #define CPP_PREDEFINES \
  54   "-Dunix -Asystem(unix) -D__gnu_linux__ -Dlinux -Asystem(linux) -D__ELF__ \
  55    -Acpu(s390) -Amachine(s390) -D__s390__"
  56
  57 #define CPP_ARCH31_SPEC ""
  58 #define CPP_ARCH64_SPEC "-D__s390x__ -D__LONG_MAX__=9223372036854775807L"
  59
  60 #undef  CPP_SPEC
  61 #ifdef DEFAULT_TARGET_64BIT
  62 #define CPP_SPEC "%{!m31:%(cpp_arch64)}"
  63 #else
  64 #define CPP_SPEC "%{m64:%(cpp_arch64)}"
  65 #endif
  66
  67 /* Target specific compiler settings.  */
  68
  69 /* ??? -fcaller-saves sometimes doesn't work.  Fix this! */
  70 #undef  CC1_SPEC
  71 #define CC1_SPEC "-fno-caller-saves"
  72 #undef  CC1PLUS_SPEC
  73 #define CC1PLUS_SPEC "-fno-caller-saves"
  74
  75
  76 /* Target specific assembler settings.  */
  77
  78 #ifdef DEFAULT_TARGET_64BIT
  79 #undef  ASM_SPEC
  80 #define ASM_SPEC "%{m31:-m31 -Aesa}"
  81 #else
  82 #undef  ASM_SPEC
  83 #define ASM_SPEC "%{m64:-m64 -Aesame}"
  84 #endif
  85
  86
  87 /* Target specific linker settings.  */
  88
  89 #define LINK_ARCH31_SPEC \
  90   "-m elf_s390 \
  91    %{shared:-shared} \
  92    %{!shared: \
  93       %{static:-static} \
  94       %{!static: \
  95         %{rdynamic:-export-dynamic} \
  96         %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
  97
  98 #define LINK_ARCH64_SPEC \
  99   "-m elf64_s390 \
 100    %{shared:-shared} \
 101    %{!shared: \
 102       %{static:-static} \
 103       %{!static: \
 104         %{rdynamic:-export-dynamic} \
 105         %{!dynamic-linker:-dynamic-linker /lib/ld64.so.1}}}"
 106
 107 #ifdef DEFAULT_TARGET_64BIT
 108 #undef  LINK_SPEC
 109 #define LINK_SPEC "%{m31:%(link_arch31)} %{!m31:%(link_arch64)}"
 110 #else
 111 #undef  LINK_SPEC
 112 #define LINK_SPEC "%{m64:%(link_arch64)} %{!m64:%(link_arch31)}"
 113 #endif
 114
 115
 116 /* This macro defines names of additional specifications to put in the specs
 117    that can be used in various specifications like CC1_SPEC.  Its definition
 118    is an initializer with a subgrouping for each command option.  */
 119
 120 #define EXTRA_SPECS \
 121   { "cpp_arch31",       CPP_ARCH31_SPEC },      \
 122   { "cpp_arch64",       CPP_ARCH64_SPEC },      \
 123   { "link_arch31",      LINK_ARCH31_SPEC },     \
 124   { "link_arch64",      LINK_ARCH64_SPEC },     \
 125
 126
 127 /* Character to start a comment.  */
 128
 129 #define ASM_COMMENT_START "#"
 130
 131
 132 /* Assembler pseudos to introduce constants of various size.  */
 133
 134 #define ASM_DOUBLE "\t.double"
 135
 136 /* The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
 137 #define LOCAL_LABEL_PREFIX "."
 138
 139 /* Prefix for internally generated assembler labels.  */
 140 #define LPREFIX ".L"
 141
 142
 143 /* This is how to output the definition of a user-level label named NAME,
 144    such as the label on a static function or variable NAME.  */
 145
 146 #undef ASM_OUTPUT_LABEL
 147 #define ASM_OUTPUT_LABEL(FILE, NAME)     \
 148   (assemble_name (FILE, NAME), fputs (":\n", FILE))
 149
 150 /* Store in OUTPUT a string (made with alloca) containing
 151    an assembler-name for a local static variable named NAME.
 152    LABELNO is an integer which is different for each call.  */
 153
 154 #undef ASM_FORMAT_PRIVATE_NAME
 155 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)  \
 156 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),    \
 157   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
 158
 159
 160      /* internal macro to output long */
 161 #define _ASM_OUTPUT_LONG(FILE, VALUE)                                   \
 162       fprintf (FILE, "\t.long\t0x%lX\n", VALUE);
 163
 164
 165 /* This is how to output an element of a case-vector that is absolute.  */
 166
 167 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)                    \
 168   fprintf (FILE, "%s%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
 169            LPREFIX, VALUE)
 170
 171 /* This is how to output an element of a case-vector that is relative.  */
 172
 173 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)                \
 174   fprintf (FILE, "%s%s%d-%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
 175            LPREFIX, VALUE, LPREFIX, REL)
 176
 177
 178
 179 /* This is how to output an assembler line
 180    that says to advance the location counter
 181    to a multiple of 2**LOG bytes.  */
 182
 183 #undef ASM_OUTPUT_ALIGN
 184 #define ASM_OUTPUT_ALIGN(FILE, LOG)     \
 185     if ((LOG)!=0) fprintf ((FILE), "\t.align\t%d\n", 1<<(LOG))
 186
 187 /* This is how to output an assembler line
 188    that says to advance the location counter by SIZE bytes.  */
 189
 190 #undef ASM_OUTPUT_SKIP
 191 #define ASM_OUTPUT_SKIP(FILE, SIZE)  \
 192   fprintf ((FILE), "\t.set\t.,.+%u\n", (SIZE))
 193
 194 /* This is how to output assembler code to declare an
 195    uninitialized external linkage data object.  */
 196
 197 #undef ASM_OUTPUT_ALIGNED_BSS
 198 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
 199   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 200
 201 /* Output before read-only data.  */
 202
 203 #define TEXT_SECTION_ASM_OP ".text"
 204
 205 /* Output before writable (initialized) data.  */
 206
 207 #define DATA_SECTION_ASM_OP ".data"
 208
 209 /* Output before writable (uninitialized) data.  */
 210
 211 #define BSS_SECTION_ASM_OP ".bss"
 212
 213 /* This is how to output a command to make the user-level label named NAME
 214    defined for reference from other files.  */
 215
 216 #define ASM_GLOBALIZE_LABEL(FILE, NAME)  \
 217   (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
 218 \f
 219 /* Output code to add DELTA to the first argument, and then jump to FUNCTION.
 220    Used for C++ multiple inheritance.  */
 221 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION)              \
 222 do {                                                                          \
 223   if (TARGET_64BIT)                                                           \
 224     {                                                                         \
 225       if (flag_pic)                                                           \
 226         {                                                                     \
 227           fprintf (FILE, "\tlarl  1,0f\n");                                   \
 228           fprintf (FILE, "\tagf   %d,0(1)\n",                                 \
 229                    aggregate_value_p (TREE_TYPE                               \
 230                                       (TREE_TYPE (FUNCTION))) ? 3 :2 );       \
 231           fprintf (FILE, "\tlarl  1,");                                       \
 232           assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
 233           fprintf (FILE, "@GOTENT\n");                                        \
 234           fprintf (FILE, "\tlg    1,0(1)\n");                                 \
 235           fprintf (FILE, "\tbr    1\n");                                      \
 236           fprintf (FILE, "0:\t.long  ");                                      \
 237           fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
 238           fprintf (FILE, "\n");                                               \
 239         }                                                                     \
 240       else                                                                    \
 241         {                                                                     \
 242           fprintf (FILE, "\tlarl  1,0f\n");                                   \
 243           fprintf (FILE, "\tagf   %d,0(1)\n",                                 \
 244           aggregate_value_p (TREE_TYPE                                        \
 245                              (TREE_TYPE (FUNCTION))) ? 3 :2 );                \
 246           fprintf (FILE, "\tjg  ");                                           \
 247           assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
 248           fprintf (FILE, "\n");                                               \
 249           fprintf (FILE, "0:\t.long  ");                                      \
 250           fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
 251           fprintf (FILE, "\n");                                               \
 252         }                                                                     \
 253     }                                                                         \
 254   else                                                                        \
 255     {                                                                         \
 256       if (flag_pic)                                                           \
 257         {                                                                     \
 258           fprintf (FILE, "\tbras  1,0f\n");                                   \
 259           fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_-.\n");                \
 260           fprintf (FILE, "\t.long  ");                                        \
 261           assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
 262           fprintf (FILE, "@GOT\n");                                           \
 263           fprintf (FILE, "\t.long  ");                                        \
 264           fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
 265           fprintf (FILE, "\n");                                               \
 266           fprintf (FILE, "0:\tal  %d,8(1)\n",                                 \
 267                    aggregate_value_p (TREE_TYPE                               \
 268                                       (TREE_TYPE (FUNCTION))) ? 3 : 2 );      \
 269           fprintf (FILE, "\tl     0,4(1)\n");                                 \
 270           fprintf (FILE, "\tal    1,0(1)\n");                                 \
 271           fprintf (FILE, "\talr   1,0\n");                                    \
 272           fprintf (FILE, "\tl     1,0(1)\n");                                 \
 273           fprintf (FILE, "\tbr    1\n");                                      \
 274         } else {                                                              \
 275           fprintf (FILE, "\tbras  1,0f\n");                                   \
 276           fprintf (FILE, "\t.long  ");                                        \
 277           assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));      \
 278           fprintf (FILE, "-.\n");                                             \
 279           fprintf (FILE, "\t.long  ");                                        \
 280           fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA));                   \
 281           fprintf (FILE, "\n");                                               \
 282           fprintf (FILE, "0:\tal  %d,4(1)\n",                                 \
 283                    aggregate_value_p (TREE_TYPE                               \
 284                                       (TREE_TYPE (FUNCTION))) ? 3 : 2 );      \
 285           fprintf (FILE, "\tal    1,0(1)\n");                                 \
 286           fprintf (FILE, "\tbr    1\n");                                      \
 287        }                                                                      \
 288     }                                                                         \
 289 } while (0)
 290
 291 #endif