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, 2004
   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, 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, 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 #define SIZE_TYPE               "unsigned int"
 100 #define PTRDIFF_TYPE            "int"
 101 #define WCHAR_TYPE              "long int"
 102 #define WCHAR_TYPE_SIZE         BITS_PER_WORD
 103 #define WINT_TYPE               "long int"
 104
 105 /*
 106  * New for multilib support. Set the default switches for multilib,
 107  * which is -melf.
 108  */
 109 #define MULTILIB_DEFAULTS { "melf" }
 110
 111 \f
 112 /* Please note that these specs may look messy but they are required in
 113    order to emulate the SCO Development system as closely as possible.
 114    With SCO Open Server 5.0, you now get the linker and assembler free,
 115    so that is what these specs are targeted for. These utilities are
 116    very argument sensitive: a space in the wrong place breaks everything.
 117    So please forgive this mess. It works.
 118
 119    Parameters which can be passed to gcc, and their SCO equivalents:
 120    GCC Parameter                SCO Equivalent
 121    -ansi                        -a ansi
 122    -posix                       -a posix
 123    -Xpg4                        -a xpg4
 124    -Xpg4plus                    -a xpg4plus
 125    -Xods30                      -a ods30
 126
 127    As with SCO, the default is XPG4 plus mode. SCO also allows you to
 128    specify a C dialect with -Xt, -Xa, -Xc, -Xk and -Xm. These are passed
 129    on to the assembler and linker in the same way that the SCO compiler
 130    does.
 131
 132    SCO also allows you to compile, link and generate either ELF or COFF
 133    binaries. With gcc, we now only support ELF mode.
 134
 135    GCC also requires that the user has installed OSS646, the Execution
 136    Environment Update, or is running release 5.0.7 or later. This has
 137    many fixes to the ELF link editor and assembler, and a considerably
 138    improved libc and RTLD.
 139
 140    In terms of tool usage, we want to use the standard link editor always,
 141    and either the GNU assembler or the native assembler. With OSS646 the
 142    native assembler has grown up quite a bit. Some of the specs below
 143    assume that /usr/gnu is the prefix for the GNU tools, because thats
 144    where the SCO provided ones go. This is especially important for
 145    include and library search path ordering. We want to look in /usr/gnu
 146    first because frequently people are linking against -lintl, and they
 147    MEAN to link with gettext. What they get is the SCO intl library. Its
 148    a REAL pity that GNU gettext chose that name; perhaps in a future
 149    version they can be persuaded to change it to -lgnuintl and have a
 150    link so that -lintl will work for other systems. The same goes for
 151    header files. We want /usr/gnu/include searched for before the system
 152    header files. Hence the -isystem /usr/gnu/include in the CPP_SPEC.
 153    We get /usr/gnu/lib first by virtue of the MD_STARTFILE_PREFIX below.
 154 */
 155
 156 #define MD_STARTFILE_PREFIX     "/usr/gnu/lib/"
 157 #define MD_STARTFILE_PREFIX_1   "/usr/ccs/lib/"
 158
 159 #if USE_GAS
 160 # define MD_EXEC_PREFIX         "/usr/gnu/bin/"
 161 #else
 162 # define MD_EXEC_PREFIX         "/usr/ccs/bin/elf/"
 163 #endif
 164
 165 /* Always use the system linker, please.  */
 166 #ifndef DEFAULT_LINKER
 167 # define DEFAULT_LINKER         "/usr/ccs/bin/elf/ld"
 168 #endif
 169
 170 /* Set up assembler flags for PIC and ELF compilations */
 171 #undef ASM_SPEC
 172
 173 #if USE_GAS
 174   /* Leave ASM_SPEC undefined so we pick up the master copy from gcc.c  */
 175 #else
 176 #define ASM_SPEC \
 177    "%{Ym,*} %{Yd,*} %{Wa,*:%*} \
 178     -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}"
 179 #endif
 180
 181 /*
 182  * Use crti.o for shared objects, crt1.o for normal executables. Make sure
 183  * to recognize both -G and -shared as a valid way of introducing shared
 184  * library generation. This is important for backwards compatibility.
 185  */
 186
 187 #undef STARTFILE_SPEC
 188 #define STARTFILE_SPEC \
 189  "%{pg:%e-pg not supported on this platform} \
 190   %{p:%{pp:%e-p and -pp specified - pick one}} \
 191  %{!shared:\
 192    %{!symbolic: \
 193     %{!G: \
 194      %{pp:pcrt1elf.o%s}%{p:mcrt1.o%s}%{!p:%{!pp:crt1.o%s}}}}} \
 195   crti.o%s \
 196   %{ansi:values-Xc.o%s} \
 197   %{!ansi: \
 198    %{traditional:values-Xt.o%s} \
 199     %{!traditional: \
 200      %{Xa:values-Xa.o%s} \
 201       %{!Xa:%{Xc:values-Xc.o%s} \
 202        %{!Xc:%{Xk:values-Xk.o%s} \
 203         %{!Xk:%{Xt:values-Xt.o%s} \
 204          %{!Xt:values-Xa.o%s}}}}}} \
 205   crtbegin.o%s"
 206
 207 #undef ENDFILE_SPEC
 208 #define ENDFILE_SPEC \
 209  "crtend.o%s crtn.o%s"
 210
 211 #define TARGET_OS_CPP_BUILTINS()                                \
 212   do                                                            \
 213     {                                                           \
 214         builtin_define ("__unix");                              \
 215         builtin_define ("_SCO_DS");                             \
 216         builtin_define ("_SCO_DS_LL");                          \
 217         builtin_define ("_SCO_ELF");                            \
 218         builtin_define ("_M_I386");                             \
 219         builtin_define ("_M_XENIX");                            \
 220         builtin_define ("_M_UNIX");                             \
 221         builtin_assert ("system=svr3");                         \
 222         if (flag_iso)                                           \
 223           cpp_define (pfile, "_STRICT_ANSI");                   \
 224     }                                                           \
 225   while (0)
 226
 227 #undef CPP_SPEC
 228 #define CPP_SPEC "\
 229   -isystem /usr/gnu/include \
 230   %{!Xods30:-D_STRICT_NAMES} \
 231   %{!ansi:%{!posix:%{!Xods30:-D_SCO_XPG_VERS=4}}} \
 232   %{ansi:-isystem include/ansi%s -isystem /usr/include/ansi} \
 233   %{!ansi: \
 234    %{posix:-isystem include/posix%s -isystem /usr/include/posix \
 235            -D_POSIX_C_SOURCE=2 -D_POSIX_SOURCE=1} \
 236     %{!posix:%{Xpg4:-isystem include/xpg4%s -isystem /usr/include/xpg4 \
 237                     -D_XOPEN_SOURCE=1} \
 238      %{!Xpg4:-D_M_I86 -D_M_I86SM -D_M_INTERNAT -D_M_SDATA -D_M_STEXT \
 239              -D_M_BITFIELDS -D_M_SYS5 -D_M_SYSV -D_M_SYSIII \
 240              -D_M_WORDSWAP -Dunix -DM_I386 -DM_UNIX -DM_XENIX \
 241              %{Xods30:-isystem include/ods_30_compat%s \
 242                       -isystem /usr/include/ods_30_compat \
 243                       -D_SCO_ODS_30 -DM_I86 -DM_I86SM -DM_SDATA -DM_STEXT \
 244                       -DM_BITFIELDS -DM_SYS5 -DM_SYSV -DM_INTERNAT -DM_SYSIII \
 245                       -DM_WORDSWAP}}}} \
 246   %{scointl:-DM_INTERNAT -D_M_INTERNAT} \
 247   %{Xa:-D_SCO_C_DIALECT=1} \
 248   %{!Xa:%{Xc:-D_SCO_C_DIALECT=3} \
 249    %{!Xc:%{Xk:-D_SCO_C_DIALECT=4} \
 250     %{!Xk:%{Xt:-D_SCO_C_DIALECT=2} \
 251      %{!Xt:-D_SCO_C_DIALECT=1}}}}"
 252
 253 #undef LINK_SPEC
 254 #define LINK_SPEC \
 255  "%{!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}}} \
 256   %{YP,*} %{YL,*} %{YU,*} \
 257   %{!YP,*:%{p:-YP,/usr/ccs/libp:/lib/libp:/usr/lib/libp:/usr/ccs/lib:/lib:/usr/lib} \
 258    %{!p:-YP,/usr/ccs/lib:/lib:/usr/lib}} \
 259   %{h*} %{static:-dn -Bstatic %{G:%e-G and -static are mutually exclusive}} \
 260   %{shared:%{!G:-G}} %{G:%{!shared:-G}} %{shared:%{G:-G}} \
 261   %{shared:-dy %{symbolic:-Bsymbolic -G} %{z*}} %{R*} %{Y*} \
 262   %{Qn:} %{!Qy:-Qn} -z alt_resolve"
 263
 264 /* Library spec. If we are not building a shared library, provide the
 265    standard libraries, as per the SCO compiler.  */
 266
 267 #undef LIB_SPEC
 268 #define LIB_SPEC \
 269  "%{shared:%{!G:pic/libgcc.a%s}} \
 270   %{G:%{!shared:pic/libgcc.a%s}} \
 271   %{shared:%{G:pic/libgcc.a%s}} \
 272   %{p:%{!pp:-lelfprof -lelf}} %{pp:%{!p:-lelfprof -lelf}} \
 273   %{!shared:%{!symbolic:%{!G:-lcrypt -lgen -lc}}}"
 274
 275 #undef LIBGCC_SPEC
 276 #define LIBGCC_SPEC \
 277  "%{!shared:%{!G:-lgcc}}"
 278
 279 /* Handle special EH pointer encodings.  Absolute, pc-relative, and
 280    indirect are handled automatically.  */
 281 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
 282   do {                                                                  \
 283     if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel)         \
 284       {                                                                 \
 285         fputs (ASM_LONG, FILE);                                         \
 286         assemble_name (FILE, XSTR (ADDR, 0));                           \
 287         fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
 288         goto DONE;                                                      \
 289       }                                                                 \
 290   } while (0)
 291
 292 /* Used by crtstuff.c to initialize the base of data-relative relocations.
 293    These are GOT relative on x86, so return the pic register.  */
 294 #ifdef __PIC__
 295 #define CRT_GET_RFIB_DATA(BASE)                 \
 296   {                                             \
 297     register void *ebx_ __asm__("ebx");         \
 298     BASE = ebx_;                                \
 299   }
 300 #else
 301 #define CRT_GET_RFIB_DATA(BASE)                                         \
 302   __asm__ ("call\t.LPR%=\n"                                             \
 303            ".LPR%=:\n\t"                                                \
 304            "popl\t%0\n\t"                                               \
 305            /* Due to a GAS bug, this cannot use EAX.  That encodes      \
 306               smaller than the traditional EBX, which results in the    \
 307               offset being off by one.  */                              \
 308            "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0"                 \
 309            : "=d"(BASE))
 310 #endif
 311