gcc/config/i386/sco5.h

   1 /* Definitions for Intel 386 running SCO Unix System V 3.2 Version 5.
   2    Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003
   3    Free Software Foundation, Inc.
   4    Contributed by Kean Johnston (jkj@sco.com)
   5
   6 This file is part of GCC.
   7
   8 GCC 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 GCC 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 GCC; 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 #undef TARGET_VERSION
  24 #define TARGET_VERSION fprintf (stderr, " (i386, SCO OpenServer 5 Syntax)");
  25
  26 #undef ASM_QUAD
  27
  28 #undef GLOBAL_ASM_OP
  29 #define GLOBAL_ASM_OP                   "\t.globl\t"
  30
  31 #undef BSS_SECTION_ASM_OP
  32 #define BSS_SECTION_ASM_OP              "\t.section\t.bss, \"aw\", @nobits"
  33
  34 /*
  35  * NOTE: We really do want CTORS_SECTION_ASM_OP and DTORS_SECTION_ASM_OP.
  36  * Here's the reason why. If we dont define them, and we dont define them
  37  * to always emit to the same section, the default is to emit to "named"
  38  * ctors and dtors sections. This would be great if we could use GNU ld,
  39  * but we can't. The native linker could possibly be trained to coalesce
  40  * named ctors sections, but that hasn't been done either. So if we don't
  41  * define these, many C++ ctors and dtors dont get run, because they never
  42  * wind up in the ctors/dtors arrays.
  43  */
  44 #define CTORS_SECTION_ASM_OP            "\t.section\t.ctors, \"aw\""
  45 #define DTORS_SECTION_ASM_OP            "\t.section\t.dtors, \"aw\""
  46
  47 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
  48 #undef X86_FILE_START_VERSION_DIRECTIVE
  49 #define X86_FILE_START_VERSION_DIRECTIVE true
  50
  51 /* A C statement (sans semicolon) to output to the stdio stream
  52    FILE the assembler definition of uninitialized global DECL named
  53    NAME whose size is SIZE bytes and alignment is ALIGN bytes.
  54    Try to use asm_output_aligned_bss to implement this macro.  */
  55
  56 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  57   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  58
  59 #undef DBX_REGISTER_NUMBER
  60 #define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]
  61
  62 #define DWARF2_DEBUGGING_INFO           1
  63 #define DBX_DEBUGGING_INFO              1
  64
  65 #undef PREFERRED_DEBUGGING_TYPE
  66 #define PREFERRED_DEBUGGING_TYPE        DWARF2_DEBUG
  67
  68 #undef DWARF2_UNWIND_INFO
  69 #define DWARF2_UNWIND_INFO              1
  70
  71 #undef NO_IMPLICIT_EXTERN_C
  72 #define NO_IMPLICIT_EXTERN_C            1
  73
  74 #undef SWITCH_TAKES_ARG
  75 #define SWITCH_TAKES_ARG(CHAR)                                          \
  76   (DEFAULT_SWITCH_TAKES_ARG(CHAR)                                       \
  77    || (CHAR) == 'h'                                                     \
  78    || (CHAR) == 'R'                                                     \
  79    || (CHAR) == 'Y'                                                     \
  80    || (CHAR) == 'z')
  81
  82 #undef WORD_SWITCH_TAKES_ARG
  83 #define WORD_SWITCH_TAKES_ARG(STR)                                      \
  84  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                                   \
  85   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")                     \
  86   && strcmp (STR, "Tbss"))
  87
  88 #undef TARGET_SUBTARGET_DEFAULT
  89 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS)
  90
  91 /*
  92  * Define sizes and types
  93  */
  94 #undef SIZE_TYPE
  95 #undef PTRDIFF_TYPE
  96 #undef WCHAR_TYPE
  97 #undef WCHAR_TYPE_SIZE
  98 #undef WINT_TYPE
  99 #undef LONG_DOUBLE_TYPE_SIZE
 100 #define SIZE_TYPE               "unsigned int"
 101 #define PTRDIFF_TYPE            "int"
 102 #define WCHAR_TYPE              "long int"
 103 #define WCHAR_TYPE_SIZE         BITS_PER_WORD
 104 #define WINT_TYPE               "long int"
 105 #define LONG_DOUBLE_TYPE_SIZE   96
 106
 107 /*
 108  * New for multilib support. Set the default switches for multilib,
 109  * which is -melf.
 110  */
 111 #define MULTILIB_DEFAULTS { "melf" }
 112
 113 \f
 114 /* Please note that these specs may look messy but they are required in
 115    order to emulate the SCO Development system as closely as possible.
 116    With SCO Open Server 5.0, you now get the linker and assembler free,
 117    so that is what these specs are targeted for. These utilities are
 118    very argument sensitive: a space in the wrong place breaks everything.
 119    So please forgive this mess. It works.
 120
 121    Parameters which can be passed to gcc, and their SCO equivalents:
 122    GCC Parameter                SCO Equivalent
 123    -ansi                        -a ansi
 124    -posix                       -a posix
 125    -Xpg4                        -a xpg4
 126    -Xpg4plus                    -a xpg4plus
 127    -Xods30                      -a ods30
 128
 129    As with SCO, the default is XPG4 plus mode. SCO also allows you to
 130    specify a C dialect with -Xt, -Xa, -Xc, -Xk and -Xm. These are passed
 131    on to the assembler and linker in the same way that the SCO compiler
 132    does.
 133
 134    SCO also allows you to compile, link and generate either ELF or COFF
 135    binaries. With gcc, we now only support ELF mode.
 136
 137    GCC also requires that the user has installed OSS646, the Execution
 138    Environment Update, or is running release 5.0.7 or later. This has
 139    many fixes to the ELF link editor and assembler, and a considerably
 140    improved libc and RTLD.
 141
 142    In terms of tool usage, we want to use the standard link editor always,
 143    and either the GNU assembler or the native assembler. With OSS646 the
 144    native assembler has grown up quite a bit. Some of the specs below
 145    assume that /usr/gnu is the prefix for the GNU tools, because thats
 146    where the SCO provided ones go. This is especially important for
 147    include and library search path ordering. We want to look in /usr/gnu
 148    first because frequently people are linking against -lintl, and they
 149    MEAN to link with gettext. What they get is the SCO intl library. Its
 150    a REAL pity that GNU gettext chose that name; perhaps in a future
 151    version they can be persuaded to change it to -lgnuintl and have a
 152    link so that -lintl will work for other systems. The same goes for
 153    header files. We want /usr/gnu/include searched for before the system
 154    header files. Hence the -isystem /usr/gnu/include in the CPP_SPEC.
 155    We get /usr/gnu/lib first by virtue of the MD_STARTFILE_PREFIX below.
 156 */
 157
 158 #define MD_STARTFILE_PREFIX     "/usr/gnu/lib/"
 159 #define MD_STARTFILE_PREFIX_1   "/usr/ccs/lib/"
 160
 161 #if USE_GAS
 162 # define MD_EXEC_PREFIX         "/usr/gnu/bin/"
 163 #else
 164 # define MD_EXEC_PREFIX         "/usr/ccs/bin/elf/"
 165 #endif
 166
 167 /* Always use the system linker, please.  */
 168 #ifndef DEFAULT_LINKER
 169 # define DEFAULT_LINKER         "/usr/ccs/bin/elf/ld"
 170 #endif
 171
 172 /* Set up assembler flags for PIC and ELF compilations */
 173 #undef ASM_SPEC
 174
 175 #if USE_GAS
 176   /* Leave ASM_SPEC undefined so we pick up the master copy from gcc.c  */
 177 #else
 178 #define ASM_SPEC \
 179    "%{Ym,*} %{Yd,*} %{Wa,*:%*} \
 180     -E%{Xa:a}%{!Xa:%{Xc:c}%{!Xc:%{Xk:k}%{!Xk:%{Xt:t}%{!Xt:a}}}},%{ansi:ansi}%{!ansi:%{posix:posix}%{!posix:%{Xpg4:xpg4}%{!Xpg4:%{Xpg4plus:XPG4PLUS}%{!Xpg4plus:%{Xods30:ods30}%{!Xods30:XPG4PLUS}}}}},ELF %{Qn:} %{!Qy:-Qn}"
 181 #endif
 182
 183 /*
 184  * Use crti.o for shared objects, crt1.o for normal executables. Make sure
 185  * to recognize both -G and -shared as a valid way of introducing shared
 186  * library generation. This is important for backwards compatibility.
 187  */
 188
 189 #undef STARTFILE_SPEC
 190 #define STARTFILE_SPEC \
 191  "%{pg:%e-pg not supported on this platform} \
 192   %{p:%{pp:%e-p and -pp specified - pick one}} \
 193  %{!shared:\
 194    %{!symbolic: \
 195     %{!G: \
 196      %{pp:pcrt1elf.o%s}%{p:mcrt1.o%s}%{!p:%{!pp:crt1.o%s}}}}} \
 197   crti.o%s \
 198   %{ansi:values-Xc.o%s} \
 199   %{!ansi: \
 200    %{traditional:values-Xt.o%s} \
 201     %{!traditional: \
 202      %{Xa:values-Xa.o%s} \
 203       %{!Xa:%{Xc:values-Xc.o%s} \
 204        %{!Xc:%{Xk:values-Xk.o%s} \
 205         %{!Xk:%{Xt:values-Xt.o%s} \
 206          %{!Xt:values-Xa.o%s}}}}}} \
 207   crtbegin.o%s"
 208
 209 #undef ENDFILE_SPEC
 210 #define ENDFILE_SPEC \
 211  "crtend.o%s crtn.o%s"
 212
 213 #define TARGET_OS_CPP_BUILTINS()                                \
 214   do                                                            \
 215     {                                                           \
 216         builtin_define ("__unix");                              \
 217         builtin_define ("_SCO_DS");                             \
 218         builtin_define ("_SCO_DS_LL");                          \
 219         builtin_define ("_SCO_ELF");                            \
 220         builtin_define ("_M_I386");                             \
 221         builtin_define ("_M_XENIX");                            \
 222         builtin_define ("_M_UNIX");                             \
 223         builtin_assert ("system=svr3");                         \
 224         if (flag_iso)                                           \
 225           cpp_define (pfile, "_STRICT_ANSI");                   \
 226         if (flag_pic)                                           \
 227           {                                                     \
 228             builtin_define ("__PIC__");                         \
 229             builtin_define ("__pic__");                         \
 230           }                                                     \
 231     }                                                           \
 232   while (0)
 233
 234 #undef CPP_SPEC
 235 #define CPP_SPEC "\
 236   -isystem /usr/gnu/include \
 237   %{!Xods30:-D_STRICT_NAMES} \
 238   %{!ansi:%{!posix:%{!Xods30:-D_SCO_XPG_VERS=4}}} \
 239   %{ansi:-isystem include/ansi%s -isystem /usr/include/ansi} \
 240   %{!ansi: \
 241    %{posix:-isystem include/posix%s -isystem /usr/include/posix \
 242            -D_POSIX_C_SOURCE=2 -D_POSIX_SOURCE=1} \
 243     %{!posix:%{Xpg4:-isystem include/xpg4%s -isystem /usr/include/xpg4 \
 244                     -D_XOPEN_SOURCE=1} \
 245      %{!Xpg4:-D_M_I86 -D_M_I86SM -D_M_INTERNAT -D_M_SDATA -D_M_STEXT \
 246              -D_M_BITFIELDS -D_M_SYS5 -D_M_SYSV -D_M_SYSIII \
 247              -D_M_WORDSWAP -Dunix -DM_I386 -DM_UNIX -DM_XENIX \
 248              %{Xods30:-isystem include/ods_30_compat%s \
 249                       -isystem /usr/include/ods_30_compat \
 250                       -D_SCO_ODS_30 -DM_I86 -DM_I86SM -DM_SDATA -DM_STEXT \
 251                       -DM_BITFIELDS -DM_SYS5 -DM_SYSV -DM_INTERNAT -DM_SYSIII \
 252                       -DM_WORDSWAP}}}} \
 253   %{scointl:-DM_INTERNAT -D_M_INTERNAT} \
 254   %{Xa:-D_SCO_C_DIALECT=1} \
 255   %{!Xa:%{Xc:-D_SCO_C_DIALECT=3} \
 256    %{!Xc:%{Xk:-D_SCO_C_DIALECT=4} \
 257     %{!Xk:%{Xt:-D_SCO_C_DIALECT=2} \
 258      %{!Xt:-D_SCO_C_DIALECT=1}}}}"
 259
 260 #undef LINK_SPEC
 261 #define LINK_SPEC \
 262  "%{!shared:%{!symbolic:%{!G:-E%{Xa:a}%{!Xa:%{Xc:c}%{!Xc:%{Xk:k}%{!Xk:%{Xt:t}%{!Xt:a}}}},%{ansi:ansi}%{!ansi:%{posix:posix}%{!posix:%{Xpg4:xpg4}%{!Xpg4:%{Xpg4plus:XPG4PLUS}%{!Xpg4plus:%{Xods30:ods30}%{!Xods30:XPG4PLUS}}}}},ELF}}} \
 263   %{Wl,*:%*} %{YP,*} %{YL,*} %{YU,*} \
 264   %{!YP,*:%{p:-YP,/usr/ccs/libp:/lib/libp:/usr/lib/libp:/usr/ccs/lib:/lib:/usr/lib} \
 265    %{!p:-YP,/usr/ccs/lib:/lib:/usr/lib}} \
 266   %{h*} %{static:-dn -Bstatic %{G:%e-G and -static are mutually exclusive}} \
 267   %{shared:%{!G:-G}} %{G:%{!shared:-G}} %{shared:%{G:-G}} \
 268   %{shared:-dy %{symbolic:-Bsymbolic -G} %{z*}} %{R*} %{Y*} \
 269   %{Qn:} %{!Qy:-Qn} -z alt_resolve"
 270
 271 /* Library spec. If we are not building a shared library, provide the
 272    standard libraries, as per the SCO compiler.  */
 273
 274 #undef LIB_SPEC
 275 #define LIB_SPEC \
 276  "%{shared:%{!G:pic/libgcc.a%s}} \
 277   %{G:%{!shared:pic/libgcc.a%s}} \
 278   %{shared:%{G:pic/libgcc.a%s}} \
 279   %{p:%{!pp:-lelfprof -lelf}} %{pp:%{!p:-lelfprof -lelf}} \
 280   %{!shared:%{!symbolic:%{!G:-lcrypt -lgen -lc}}}"
 281
 282 #undef LIBGCC_SPEC
 283 #define LIBGCC_SPEC \
 284  "%{!shared:%{!G:-lgcc}}"
 285
 286 /* Here for legacy support only so we still accept -melf flag */
 287 #define MASK_COFF               010000000000    /* Mask for COFF generation */
 288 #define TARGET_ELF              (1)
 289
 290 #undef SUBTARGET_SWITCHES
 291 #define SUBTARGET_SWITCHES                                      \
 292         { "elf", -MASK_COFF, N_("Generate ELF output")  },
 293
 294 /* Handle special EH pointer encodings.  Absolute, pc-relative, and
 295    indirect are handled automatically.  */
 296 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
 297   do {                                                                  \
 298     if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel)         \
 299       {                                                                 \
 300         fputs (ASM_LONG, FILE);                                         \
 301         assemble_name (FILE, XSTR (ADDR, 0));                           \
 302         fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
 303         goto DONE;                                                      \
 304       }                                                                 \
 305   } while (0)
 306
 307 /* Used by crtstuff.c to initialize the base of data-relative relocations.
 308    These are GOT relative on x86, so return the pic register.  */
 309 #ifdef __PIC__
 310 #define CRT_GET_RFIB_DATA(BASE)                 \
 311   {                                             \
 312     register void *ebx_ __asm__("ebx");         \
 313     BASE = ebx_;                                \
 314   }
 315 #else
 316 #define CRT_GET_RFIB_DATA(BASE)                                         \
 317   __asm__ ("call\t.LPR%=\n"                                             \
 318            ".LPR%=:\n\t"                                                \
 319            "popl\t%0\n\t"                                               \
 320            /* Due to a GAS bug, this cannot use EAX.  That encodes      \
 321               smaller than the traditional EBX, which results in the    \
 322               offset being off by one.  */                              \
 323            "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0"                 \
 324            : "=d"(BASE))
 325 #endif
 326