gcc/config/i386/vxworks.h

   1 /* IA32 VxWorks target definitions for GNU compiler.
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3    Updated by CodeSourcery, LLC.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef  ASM_SPEC
  22 #define ASM_SPEC ""
  23
  24 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  25   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  26
  27 /* VxWorks uses the same ABI as Solaris 2, so use i386/sol2.h version.  */
  28
  29 #undef TARGET_SUBTARGET_DEFAULT
  30 #define TARGET_SUBTARGET_DEFAULT \
  31         (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_VECT8_RETURNS)
  32
  33 /* Provide our target specific DBX_REGISTER_NUMBER.  VxWorks relies on
  34    the SVR4 numbering.  */
  35
  36 #undef DBX_REGISTER_NUMBER
  37 #define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]
  38
  39 #define TARGET_OS_CPP_BUILTINS()                        \
  40   do                                                    \
  41     {                                                   \
  42       VXWORKS_OS_CPP_BUILTINS ();                       \
  43       if (TARGET_386)                                   \
  44         builtin_define ("CPU=I80386");                  \
  45       else if (TARGET_486)                              \
  46         builtin_define ("CPU=I80486");                  \
  47       else if (TARGET_PENTIUM)                          \
  48         {                                               \
  49           builtin_define ("CPU=PENTIUM");               \
  50           builtin_define ("CPU_VARIANT=PENTIUM");       \
  51         }                                               \
  52       else if (TARGET_PENTIUMPRO)                       \
  53         {                                               \
  54           builtin_define ("CPU=PENTIUM2");              \
  55           builtin_define ("CPU_VARIANT=PENTIUMPRO");    \
  56         }                                               \
  57       else if (TARGET_PENTIUM4)                         \
  58         {                                               \
  59           builtin_define ("CPU=PENTIUM4");              \
  60           builtin_define ("CPU_VARIANT=PENTIUM4");      \
  61         }                                               \
  62     }                                                   \
  63   while (0)
  64
  65 #undef  CPP_SPEC
  66 #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
  67 #undef  LIB_SPEC
  68 #define LIB_SPEC VXWORKS_LIB_SPEC
  69 #undef  STARTFILE_SPEC
  70 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  71 #undef  ENDFILE_SPEC
  72 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  73 #undef  LINK_SPEC
  74 #define LINK_SPEC VXWORKS_LINK_SPEC
  75
  76 #undef  SUBTARGET_SWITCHES
  77 #define SUBTARGET_SWITCHES EXTRA_SUBTARGET_SWITCHES
  78
  79 #undef SUBTARGET_OVERRIDE_OPTIONS
  80 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
  81
  82 /* No _mcount profiling on VxWorks.  */
  83 #undef FUNCTION_PROFILER
  84 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
  85
  86 /* We cannot use PC-relative accesses for VxWorks PIC because there is no
  87    fixed gap between segments.  */
  88 #undef ASM_PREFERRED_EH_DATA_FORMAT
  89
  90 /* Define this to be nonzero if static stack checking is supported.  */
  91 #define STACK_CHECK_STATIC_BUILTIN 1
  92
  93 /* This platform supports the probing method of stack checking (RTP mode).
  94    8K is reserved in the stack to propagate exceptions in case of overflow.  */
  95 #define STACK_CHECK_PROTECT 8192