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 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 #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 coallesce
  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 DWARF_DEBUGGING_INFO            1
  64 #define DBX_DEBUGGING_INFO              1
  65
  66 #undef PREFERRED_DEBUGGING_TYPE
  67 #define PREFERRED_DEBUGGING_TYPE        DWARF2_DEBUG
  68
  69 #undef DWARF2_UNWIND_INFO
  70 #define DWARF2_UNWIND_INFO              1
  71
  72 #undef NO_IMPLICIT_EXTERN_C
  73 #define NO_IMPLICIT_EXTERN_C            1
  74
  75 #undef SWITCH_TAKES_ARG
  76 #define SWITCH_TAKES_ARG(CHAR)                                          \
  77   (DEFAULT_SWITCH_TAKES_ARG(CHAR)                                       \
  78    || (CHAR) == 'h'                                                     \
  79    || (CHAR) == 'R'                                                     \
  80    || (CHAR) == 'Y'                                                     \
  81    || (CHAR) == 'z')
  82
  83 #undef WORD_SWITCH_TAKES_ARG
  84 #define WORD_SWITCH_TAKES_ARG(STR)                                      \
  85  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                                   \
  86   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")                     \
  87   && strcmp (STR, "Tbss"))
  88
  89 #undef TARGET_SUBTARGET_DEFAULT
  90 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS)
  91
  92 /*
  93  * Define sizes and types
  94  */
  95 #undef SIZE_TYPE
  96 #undef PTRDIFF_TYPE
  97 #undef WCHAR_TYPE
  98 #undef WCHAR_TYPE_SIZE
  99 #undef WINT_TYPE
 100 #undef LONG_DOUBLE_TYPE_SIZE
 101 #define SIZE_TYPE               "unsigned int"
 102 #define PTRDIFF_TYPE            "int"
 103 #define WCHAR_TYPE              "long int"
 104 #define WCHAR_TYPE_SIZE         BITS_PER_WORD
 105 #define WINT_TYPE               "long int"
 106 #define LONG_DOUBLE_TYPE_SIZE   96
 107
 108 /*
 109  * New for multilib support. Set the default switches for multilib,
 110  * which is -melf.
 111  */
 112 #define MULTILIB_DEFAULTS { "melf" }
 113
 114 \f
 115 /* Please note that these specs may look messy but they are required in
 116    order to emulate the SCO Development system as closely as possible.
 117    With SCO Open Server 5.0, you now get the linker and assembler free,
 118    so that is what these specs are targeted for. These utilities are
 119    very argument sensitive: a space in the wrong place breaks everything.
 120    So please forgive this mess. It works.
 121
 122    Parameters which can be passed to gcc, and their SCO equivalents:
 123    GCC Parameter                SCO Equivalent
 124    -ansi                        -a ansi
 125    -posix                       -a posix
 126    -Xpg4                        -a xpg4
 127    -Xpg4plus                    -a xpg4plus
 128    -Xods30                      -a ods30
 129
 130    As with SCO, the default is XPG4 plus mode. SCO also allows you to
 131    specify a C dialect with -Xt, -Xa, -Xc, -Xk and -Xm. These are passed
 132    on to the assembler and linker in the same way that the SCO compiler
 133    does.
 134
 135    SCO also allows you to compile, link and generate either ELF or COFF
 136    binaries. With gcc, we now only support ELF mode.
 137
 138    GCC also requires that the user has installed OSS646, the Execution
 139    Environment Update, or is running release 5.0.7 or later. This has
 140    many fixes to the ELF link editor and assembler, and a considerably
 141    improved libc and RTLD.
 142
 143    In terms of tool usage, we want to use the standard link editor always,
 144    and either the GNU assembler or the native assembler. With OSS646 the
 145    native assembler has grown up quite a bit. Some of the specs below
 146    assume that /usr/gnu is the prefix for the GNU tools, because thats
 147    where the SCO provided ones go. This is especially important for
 148    include and library search path ordering. We want to look in /usr/gnu
 149    first, becuase frequently people are linking against -lintl, and they
 150    MEAN to link with gettext. What they get is the SCO intl library. Its
 151    a REAL pity that GNU gettext chose that name; perhaps in a future
 152    version they can be persuaded to change it to -lgnuintl and have a
 153    link so that -lintl will work for other systems. The same goes for
 154    header files. We want /usr/gnu/include searched for before the system
 155    header files. Hence the -isystem /usr/gnu/include in the CPP_SPEC.
 156    We get /usr/gnu/lib first by virtue of the MD_STARTFILE_PREFIX below.
 157 */
 158
 159 #define MD_STARTFILE_PREFIX     "/usr/gnu/lib/"
 160 #define MD_STARTFILE_PREFIX_1   "/usr/ccs/lib/"
 161
 162 #if USE_GAS
 163 # define MD_EXEC_PREFIX         "/usr/gnu/bin/"
 164 #else
 165 # define MD_EXEC_PREFIX         "/usr/ccs/bin/elf/"
 166 #endif
 167
 168 /* Always use the system linker, please.  */
 169 #ifndef DEFAULT_LINKER
 170 # define DEFAULT_LINKER         "/usr/ccs/bin/elf/ld"
 171 #endif
 172
 173 /* Set up assembler flags for PIC and ELF compilations */
 174 #undef ASM_SPEC
 175
 176 #if USE_GAS
 177   /* Leave ASM_SPEC undefined so we pick up the master copy from gcc.c  */
 178 #else
 179 #define ASM_SPEC \
 180    "%{Ym,*} %{Yd,*} %{Wa,*:%*} \
 181     -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}"
 182 #endif
 183
 184 /*
 185  * Use crti.o for shared objects, crt1.o for normal executables. Make sure
 186  * to recognize both -G and -shared as a valid way of introducing shared
 187  * library generation. This is important for backwards compatibility.
 188  */
 189
 190 #undef STARTFILE_SPEC
 191 #define STARTFILE_SPEC \
 192  "%{pg:%e-pg not supported on this platform} \
 193   %{p:%{pp:%e-p and -pp specified - pick one}} \
 194  %{!shared:\
 195    %{!symbolic: \
 196     %{!G: \
 197      %{pp:pcrt1elf.o%s}%{p:mcrt1.o%s}%{!p:%{!pp:crt1.o%s}}}}} \
 198   crti.o%s \
 199   %{ansi:values-Xc.o%s} \
 200   %{!ansi: \
 201    %{traditional:values-Xt.o%s} \
 202     %{!traditional: \
 203      %{Xa:values-Xa.o%s} \
 204       %{!Xa:%{Xc:values-Xc.o%s} \
 205        %{!Xc:%{Xk:values-Xk.o%s} \
 206         %{!Xk:%{Xt:values-Xt.o%s} \
 207          %{!Xt:values-Xa.o%s}}}}}} \
 208   crtbegin.o%s"
 209
 210 #undef ENDFILE_SPEC
 211 #define ENDFILE_SPEC \
 212  "crtend.o%s crtn.o%s"
 213
 214 #define TARGET_OS_CPP_BUILTINS()                                \
 215   do                                                            \
 216     {                                                           \
 217         builtin_define ("__unix");                              \
 218         builtin_define ("_SCO_DS");                             \
 219         builtin_define ("_SCO_DS_LL");                          \
 220         builtin_define ("_SCO_ELF");                            \
 221         builtin_define ("_M_I386");                             \
 222         builtin_define ("_M_XENIX");                            \
 223         builtin_define ("_M_UNIX");                             \
 224         builtin_assert ("system=svr3");                         \
 225         if (flag_iso)                                           \
 226           cpp_define (pfile, "_STRICT_ANSI");                   \
 227         if (flag_pic)                                           \
 228           {                                                     \
 229             builtin_define ("__PIC__");                         \
 230             builtin_define ("__pic__");                         \
 231           }                                                     \
 232     }                                                           \
 233   while (0)
 234
 235 #undef CPP_SPEC
 236 #define CPP_SPEC "\
 237   -isystem /usr/gnu/include \
 238   %{!Xods30:-D_STRICT_NAMES} \
 239   %{!ansi:%{!posix:%{!Xods30:-D_SCO_XPG_VERS=4}}} \
 240   %{ansi:-isystem include/ansi%s -isystem /usr/include/ansi} \
 241   %{!ansi: \
 242    %{posix:-isystem include/posix%s -isystem /usr/include/posix \
 243            -D_POSIX_C_SOURCE=2 -D_POSIX_SOURCE=1} \
 244     %{!posix:%{Xpg4:-isystem include/xpg4%s -isystem /usr/include/xpg4 \
 245                     -D_XOPEN_SOURCE=1} \
 246      %{!Xpg4:-D_M_I86 -D_M_I86SM -D_M_INTERNAT -D_M_SDATA -D_M_STEXT \
 247              -D_M_BITFIELDS -D_M_SYS5 -D_M_SYSV -D_M_SYSIII \
 248              -D_M_WORDSWAP -Dunix -DM_I386 -DM_UNIX -DM_XENIX \
 249              %{Xods30:-isystem include/ods_30_compat%s \
 250                       -isystem /usr/include/ods_30_compat \
 251                       -D_SCO_ODS_30 -DM_I86 -DM_I86SM -DM_SDATA -DM_STEXT \
 252                       -DM_BITFIELDS -DM_SYS5 -DM_SYSV -DM_INTERNAT -DM_SYSIII \
 253                       -DM_WORDSWAP}}}} \
 254   %{scointl:-DM_INTERNAT -D_M_INTERNAT} \
 255   %{Xa:-D_SCO_C_DIALECT=1} \
 256   %{!Xa:%{Xc:-D_SCO_C_DIALECT=3} \
 257    %{!Xc:%{Xk:-D_SCO_C_DIALECT=4} \
 258     %{!Xk:%{Xt:-D_SCO_C_DIALECT=2} \
 259      %{!Xt:-D_SCO_C_DIALECT=1}}}}"
 260
 261 #undef LINK_SPEC
 262 #define LINK_SPEC \
 263  "%{!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}}} \
 264   %{Wl,*:%*} %{YP,*} %{YL,*} %{YU,*} \
 265   %{!YP,*:%{p:-YP,/usr/ccs/libp:/lib/libp:/usr/lib/libp:/usr/ccs/lib:/lib:/usr/lib} \
 266    %{!p:-YP,/usr/ccs/lib:/lib:/usr/lib}} \
 267   %{h*} %{static:-dn -Bstatic %{G:%e-G and -static are mutually exclusive}} \
 268   %{shared:%{!G:-G}} %{G:%{!shared:-G}} %{shared:%{G:-G}} \
 269   %{shared:-dy %{symbolic:-Bsymbolic -G} %{z*}} %{R*} %{Y*} \
 270   %{Qn:} %{!Qy:-Qn} -z alt_resolve"
 271
 272 /* Library spec. If we are not building a shared library, provide the
 273    standard libraries, as per the SCO compiler.  */
 274
 275 #undef LIB_SPEC
 276 #define LIB_SPEC \
 277  "%{shared:%{!G:pic/libgcc.a%s}} \
 278   %{G:%{!shared:pic/libgcc.a%s}} \
 279   %{shared:%{G:pic/libgcc.a%s}} \
 280   %{p:%{!pp:-lelfprof -lelf}} %{pp:%{!p:-lelfprof -lelf}} \
 281   %{!shared:%{!symbolic:%{!G:-lcrypt -lgen -lc}}}"
 282
 283 #undef LIBGCC_SPEC
 284 #define LIBGCC_SPEC \
 285  "%{!shared:%{!G:-lgcc}}"
 286
 287 /* Here for legacy support only so we still accept -melf flag */
 288 #define MASK_COFF               010000000000    /* Mask for COFF generation */
 289 #define TARGET_ELF              (1)
 290
 291 #undef SUBTARGET_SWITCHES
 292 #define SUBTARGET_SWITCHES                                      \
 293         { "elf", -MASK_COFF, N_("Generate ELF output")  },
 294
 295 /* Handle special EH pointer encodings.  Absolute, pc-relative, and
 296    indirect are handled automatically.  */
 297 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
 298   do {                                                                  \
 299     if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel)         \
 300       {                                                                 \
 301         fputs (ASM_LONG, FILE);                                         \
 302         assemble_name (FILE, XSTR (ADDR, 0));                           \
 303         fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
 304         goto DONE;                                                      \
 305       }                                                                 \
 306   } while (0)
 307
 308 /* Used by crtstuff.c to initialize the base of data-relative relocations.
 309    These are GOT relative on x86, so return the pic register.  */
 310 #ifdef __PIC__
 311 #define CRT_GET_RFIB_DATA(BASE)                 \
 312   {                                             \
 313     register void *ebx_ __asm__("ebx");         \
 314     BASE = ebx_;                                \
 315   }
 316 #else
 317 #define CRT_GET_RFIB_DATA(BASE)                                         \
 318   __asm__ ("call\t.LPR%=\n"                                             \
 319            ".LPR%=:\n\t"                                                \
 320            "popl\t%0\n\t"                                               \
 321            /* Due to a GAS bug, this cannot use EAX.  That encodes      \
 322               smaller than the traditional EBX, which results in the    \
 323               offset being off by one.  */                              \
 324            "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0"                 \
 325            : "=d"(BASE))
 326 #endif
 327