gcc/config/m88k/dgux.h

   1 /* Definitions of target machine for GNU compiler.
   2    Motorola m88100 running DG/UX.
   3    Copyright (C) 1988, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
   4    Contributed by Michael Tiemann (tiemann@mcc.com)
   5    Currently maintained by (gcc@dg-rtp.dg.com)
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* You're not seeing double!  To transition to dwarf debugging, both are
  25    supported.  The option -msvr4 specifies elf.  With these combinations,
  26    -g means dwarf.  */
  27 /* DWARF_DEBUGGING_INFO defined in svr4.h.  */
  28 #define SDB_DEBUGGING_INFO
  29 #define PREFERRED_DEBUGGING_TYPE \
  30   (TARGET_SVR4 ? DWARF_DEBUG : SDB_DEBUG)
  31
  32 #ifndef VERSION_INFO2
  33 #define VERSION_INFO2   "$Revision: 1.25 $"
  34 #endif
  35 #ifndef NO_BUGS
  36 #define AS_BUG_IMMEDIATE_LABEL
  37 /* The DG/UX 4.30 assembler doesn't accept the symbol `fcr63'.  */
  38 #define AS_BUG_FLDCR
  39 #endif
  40
  41 #include "svr4.h"
  42 #include "m88k/m88k.h"
  43
  44 /* Augment TARGET_SWITCHES with the MXDB options.  */
  45 #define MASK_STANDARD           0x40000000 /* Retain standard information */
  46 #define MASK_NOLEGEND           0x20000000 /* Discard legend information */
  47 #define MASK_EXTERNAL_LEGEND    0x10000000 /* Make external legends */
  48
  49 #define TARGET_STANDARD           (target_flags & MASK_STANDARD)
  50 #define TARGET_NOLEGEND           (target_flags & MASK_NOLEGEND)
  51 #define TARGET_EXTERNAL_LEGEND    (target_flags & MASK_EXTERNAL_LEGEND)
  52
  53 #undef  SUBTARGET_SWITCHES
  54 #define SUBTARGET_SWITCHES \
  55     { "standard",                        MASK_STANDARD }, \
  56     { "legend",                         -MASK_NOLEGEND }, \
  57     { "no-legend",                       MASK_NOLEGEND }, \
  58     { "external-legend",                 MASK_EXTERNAL_LEGEND }, \
  59     /* the following is used only in the *_SPEC's */ \
  60     { "keep-coff",                       0 },
  61
  62 /* Default switches */
  63 #undef  TARGET_DEFAULT
  64 #define TARGET_DEFAULT  (MASK_CHECK_ZERO_DIV     | \
  65                          MASK_OCS_DEBUG_INFO     | \
  66                          MASK_OCS_FRAME_POSITION | \
  67                          MASK_STANDARD           | \
  68                          MASK_SVR4)
  69 #undef  CPU_DEFAULT
  70 #define CPU_DEFAULT MASK_88000
  71
  72 /* Macros to be automatically defined.  __svr4__ is our extension.
  73    __CLASSIFY_TYPE__ is used in the <varargs.h> and <stdarg.h> header
  74    files with DG/UX revision 5.40 and later.  This allows GNU CC to
  75    operate without installing the header files.  */
  76
  77 #undef  CPP_PREDEFINES
  78 #define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DDGUX -D__CLASSIFY_TYPE__=2\
  79    -D__svr4__ -Asystem(unix) -Acpu(m88k) -Amachine(m88k)"
  80
  81 /* If -m88100 is in effect, add -Dm88100; similarly for -m88110.
  82    Here, the CPU_DEFAULT is assumed to be -m88000.  If not -ansi,
  83    -traditional, or restricting include files to one specific source
  84    target, specify full DG/UX features.  */
  85 #undef  CPP_SPEC
  86 #define CPP_SPEC "%(cpp_cpu) %{msvr3:-D_M88KBCS_TARGET} %{!msvr3:-D_DGUX_TARGET}"
  87
  88 /* Assembler support (-V, silicon filter, legends for mxdb).  */
  89 #undef  ASM_SPEC
  90 #define ASM_SPEC "%{pipe:%{!.s: - }\
  91                    %{!msvr3:%{!m88110:-KV3 }%{m88110:-KV04.00 }}}\
  92                   %(asm_cpu)"
  93
  94 /* Override svr4.h.  */
  95 #undef  ASM_FINAL_SPEC
  96 #undef  STARTFILE_SPEC
  97
  98 /* Linker and library spec's.
  99    -msvr4 is the default if -msvr3 is not specified.
 100    -static, -shared, -symbolic, -h* and -z* access AT&T V.4 link options.
 101    -svr4 instructs gcc to place /usr/lib/values-X[cat].o on the link line.
 102    -msvr3 indicates linking done in a COFF environment and the link
 103    script is added to the link line.  In all environments, the first
 104    and last objects are crtbegin.o (or bcscrtbegin.o) and crtend.o.
 105    When the -G link option is used (-shared and -symbolic) a final
 106    link is not being done.  */
 107 #undef  ENDFILE_SPEC
 108 #define ENDFILE_SPEC "crtend.o%s"
 109 #undef  LIB_SPEC
 110 #define LIB_SPEC "%{!msvr3:%{!shared:-lstaticdgc}} %{!shared:%{!symbolic:-lc}}"
 111 #undef  LINK_SPEC
 112 #define LINK_SPEC "%{z*} %{h*} %{v:-V} \
 113                    %{static:-dn -Bstatic} \
 114                    %{shared:-G -dy} \
 115                    %{symbolic:-Bsymbolic -G -dy} \
 116                    %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
 117 #undef  STARTFILE_SPEC
 118 #define STARTFILE_SPEC "%(startfile_default)"
 119
 120
 121 /* This macro defines names of additional specifications to put in the specs
 122    that can be used in various specifications like CC1_SPEC.  Its definition
 123    is an initializer with a subgrouping for each command option.
 124
 125    Each subgrouping contains a string constant, that defines the
 126    specification name, and a string constant that used by the GNU CC driver
 127    program.
 128
 129    Do not define this macro if it does not need to do anything.  */
 130
 131 #define EXTRA_SPECS                                     \
 132   { "cpp_cpu",          CPP_CPU_SPEC },                 \
 133   { "asm_cpu",          ASM_CPU_SPEC },                 \
 134   { "startfile_default", STARTFILE_DEFAULT_SPEC },  \
 135   { "startfile_crtbegin", STARTFILE_CRTBEGIN_SPEC }
 136
 137 /* Keep this left justified, no white space is allowed between
 138    the arguments to the -Wc option */
 139 #define ASM_CPU_SPEC "\
 140 %{v:-V} \
 141 %{g:\
 142 %{mno-legend:-Wc,off}\
 143 %{!mno-legend:-Wc,-fix-bb,-s\"%i\"\
 144 %{traditional:,-lc}\
 145 %{!traditional:,-lansi-c}\
 146 %{mstandard:,-keep-std}\
 147 %{mexternal-legend:,-external}\
 148 %{mocs-frame-position:,-ocs}}}"
 149
 150 #define CPP_CPU_SPEC "\
 151                   %{!m88000:%{!m88100:%{m88110:-D__m88110__}}} \
 152                   %{!m88000:%{!m88110:%{m88100:-D__m88100__}}} \
 153                   %{!ansi:%{!traditional:-D__OPEN_NAMESPACE__}}"
 154
 155 #define STARTFILE_DEFAULT_SPEC "\
 156                         %{!shared:%{!symbolic:%{pg:gcrt0.o%s} \
 157                          %{!pg:%{p:/lib/mcrt0.o}%{!p:/lib/crt0.o}} \
 158                           %(startfile_crtbegin) \
 159                          %{svr4:%{ansi:/lib/values-Xc.o} \
 160                           %{!ansi:%{traditional:/lib/values-Xt.o} \
 161                            %{!traditional:/usr/lib/values-Xa.o}}}}}"
 162
 163 #define STARTFILE_CRTBEGIN_SPEC "\
 164                          %{msvr3:m88kdgux.ld%s bcscrtbegin.o%s} \
 165                          %{!msvr3:crtbegin.o%s}"
 166
 167 #undef  GPLUSPLUS_INCLUDE_DIR
 168 #define GPLUSPLUS_INCLUDE_DIR "/usr/opt/g++/lib/g++-include"
 169
 170 /* Fast DG/UX version of profiler that does not require lots of
 171    registers to be stored.  */
 172 #undef  FUNCTION_PROFILER
 173 #define FUNCTION_PROFILER(FILE, LABELNO) \
 174   output_function_profiler (FILE, LABELNO, "gcc.mcount", 0)
 175
 176 /* Output the legend info for mxdb when debugging except if standard
 177    debugging information only is explicitly requested.  */
 178 #undef  ASM_FIRST_LINE
 179 #define ASM_FIRST_LINE(FILE)                                            \
 180   do {                                                                  \
 181     if (TARGET_SVR4)                                                    \
 182       {                                                                 \
 183         if (TARGET_88110)                                               \
 184           fprintf (FILE, "\t%s\t \"%s\"\n", VERSION_ASM_OP, "04.00");   \
 185         else                                                            \
 186           fprintf (FILE, "\t%s\t \"%s\"\n", VERSION_ASM_OP, "03.00");   \
 187       }                                                                 \
 188     if (write_symbols != NO_DEBUG && !TARGET_NOLEGEND)                  \
 189       {                                                                 \
 190         fprintf (FILE, ";legend_info -fix-bb -h\"gcc-%s\" -s\"%s\"",    \
 191                  VERSION_STRING, main_input_filename);                  \
 192         fputs (flag_traditional ? " -lc" : " -lansi-c", FILE);          \
 193         if (TARGET_STANDARD)                                            \
 194           fputs (" -keep-std", FILE);                                   \
 195         if (TARGET_EXTERNAL_LEGEND)                                     \
 196           fputs (" -external", FILE);                                   \
 197         if (TARGET_OCS_FRAME_POSITION)                                  \
 198           fputs (" -ocs", FILE);                                        \
 199         fputc ('\n', FILE);                                             \
 200       }                                                                 \
 201   } while (0)
 202
 203 /* Override svr4.h.  */
 204 #undef PTRDIFF_TYPE
 205 #undef WCHAR_TYPE
 206 #undef WCHAR_TYPE_SIZE
 207
 208 /* Override svr4.h and m88k.h except when compiling crtstuff.c.  These must
 209    be constant strings when compiling crtstuff.c.  Otherwise, respect the
 210    -mversion-STRING option used.  */
 211 #undef INIT_SECTION_PREAMBLE
 212 #undef INIT_SECTION_ASM_OP
 213 #undef FINI_SECTION_ASM_OP
 214 #undef CTORS_SECTION_ASM_OP
 215 #undef DTORS_SECTION_ASM_OP
 216
 217 #if defined (CRT_BEGIN) || defined (CRT_END) || defined (L__main)
 218 /* routines to invoke global constructors and destructors are always COFF
 219    to enable linking mixed COFF and ELF objects */
 220 #define FINI_SECTION_ASM_OP ("section  .fini,\"x\"")
 221 #ifndef BCS
 222 #define INIT_SECTION_PREAMBLE asm ("\taddu\tr31,r31,0x20")
 223 #endif
 224 #undef  INIT_SECTION_ASM_OP
 225 #define INIT_SECTION_ASM_OP ("section\t .init,\"x\"")
 226 #undef  CTORS_SECTION_ASM_OP
 227 #define CTORS_SECTION_ASM_OP ("section\t .ctors,\"d\"")
 228 #undef  DTORS_SECTION_ASM_OP
 229 #define DTORS_SECTION_ASM_OP ("section\t .dtors,\"d\"")
 230 #undef OBJECT_FORMAT_ELF
 231 #else
 232 #undef        INIT_SECTION_ASM_OP
 233 #define INIT_SECTION_ASM_OP (TARGET_SVR4                      \
 234                            ? "section\t .init,\"xa\""         \
 235                            : "section\t .init,\"x\"")
 236 #undef        CTORS_SECTION_ASM_OP
 237 #define CTORS_SECTION_ASM_OP (TARGET_SVR4                     \
 238                             ? "section\t .ctors,\"aw\""       \
 239                             : "section\t .ctors,\"d\"")
 240 #undef        DTORS_SECTION_ASM_OP
 241 #define DTORS_SECTION_ASM_OP (TARGET_SVR4                     \
 242                             ? "section\t .dtors,\"aw\""       \
 243                             : "section\t .dtors,\"d\"")
 244 #endif /* crtstuff.c */
 245
 246 /* The lists of global object constructors and global destructors are always
 247    placed in the .ctors/.dtors sections.  This requires the use of a link
 248    script if the COFF linker is used, but otherwise COFF and ELF objects
 249    can be intermixed.  A COFF object will pad the section to 16 bytes with
 250    zeros; and ELF object will not contain padding.  We deal with this by
 251    putting a -1 marker at the begin and end of the list and ignoring zero
 252    entries.  */
 253
 254 /* Mark the end of the .ctors/.dtors sections with a -1.  */
 255
 256 #define CTOR_LIST_BEGIN                 \
 257 asm (CTORS_SECTION_ASM_OP);             \
 258 func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) }
 259
 260 #define CTOR_LIST_END                   \
 261 asm (CTORS_SECTION_ASM_OP);             \
 262 func_ptr __CTOR_END__[1] = { (func_ptr) (-1) }
 263
 264 #define DTOR_LIST_BEGIN                 \
 265 asm (DTORS_SECTION_ASM_OP);             \
 266 func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) }
 267
 268 #define DTOR_LIST_END                   \
 269 asm (DTORS_SECTION_ASM_OP);             \
 270 func_ptr __DTOR_END__[1] = { (func_ptr) (-1) }
 271
 272 /* Walk the list ignoring NULL entries till we hit the terminating -1.  */
 273 #define DO_GLOBAL_CTORS_BODY                            \
 274   do {                                                  \
 275     int i;                                              \
 276     for (i=1;(int)(__CTOR_LIST__[i]) != -1; i++)        \
 277       if (((int *)__CTOR_LIST__)[i] != 0)               \
 278         __CTOR_LIST__[i] ();                            \
 279   } while (0)
 280
 281 /* Walk the list looking for the terminating -1 that marks the end.
 282    Go backward and ignore any NULL entries.  */
 283 #define DO_GLOBAL_DTORS_BODY                            \
 284   do {                                                  \
 285     int i;                                              \
 286     for (i=1;(int)(__DTOR_LIST__[i]) != -1; i++);       \
 287     for (i-=1;(int)(__DTOR_LIST__[i]) != -1; i--)       \
 288       if (((int *)__DTOR_LIST__)[i] != 0)               \
 289         __DTOR_LIST__[i] ();                            \
 290   } while (0)
 291
 292 /* The maximum alignment which the object file format can support.
 293    page alignment would seem to be enough */
 294 #undef MAX_OFILE_ALIGNMENT
 295 #define MAX_OFILE_ALIGNMENT 0x1000
 296
 297 /* Must use data section for relocatable constants when pic.  */
 298 #undef SELECT_RTX_SECTION
 299 #define SELECT_RTX_SECTION(MODE,RTX)            \
 300 {                                               \
 301   if (flag_pic && symbolic_operand (RTX))       \
 302     data_section ();                            \
 303   else                                          \
 304     const_section ();                           \
 305 }