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_OUTPUT_ALIGNED_BSS
  22 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  23   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  24
  25 /* VxWorks uses the same ABI as Solaris 2, so use i386/sol2.h version.  */
  26
  27 #undef TARGET_SUBTARGET_DEFAULT
  28 #define TARGET_SUBTARGET_DEFAULT \
  29         (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_VECT8_RETURNS)
  30
  31 /* Provide our target specific DBX_REGISTER_NUMBER.  VxWorks relies on
  32    the SVR4 numbering.  */
  33
  34 #undef DBX_REGISTER_NUMBER
  35 #define DBX_REGISTER_NUMBER(n) \
  36   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  37
  38 #define TARGET_OS_CPP_BUILTINS()                        \
  39   do                                                    \
  40     {                                                   \
  41       VXWORKS_OS_CPP_BUILTINS ();                       \
  42       if (TARGET_386)                                   \
  43         builtin_define ("CPU=I80386");                  \
  44       else if (TARGET_486)                              \
  45         builtin_define ("CPU=I80486");                  \
  46       else if (TARGET_PENTIUM)                          \
  47         {                                               \
  48           builtin_define ("CPU=PENTIUM");               \
  49           builtin_define ("CPU_VARIANT=PENTIUM");       \
  50         }                                               \
  51       else if (TARGET_PENTIUMPRO)                       \
  52         {                                               \
  53           builtin_define ("CPU=PENTIUM2");              \
  54           builtin_define ("CPU_VARIANT=PENTIUMPRO");    \
  55         }                                               \
  56       else if (TARGET_PENTIUM4)                         \
  57         {                                               \
  58           builtin_define ("CPU=PENTIUM4");              \
  59           builtin_define ("CPU_VARIANT=PENTIUM4");      \
  60         }                                               \
  61       else if (TARGET_64BIT)                            \
  62           builtin_define ("CPU=X86_64");                \
  63       else                                              \
  64           builtin_define ("CPU=I80386");                \
  65     }                                                   \
  66   while (0)
  67
  68 #undef  CPP_SPEC
  69 #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
  70 #undef  LIB_SPEC
  71 #define LIB_SPEC VXWORKS_LIB_SPEC
  72 #undef  STARTFILE_SPEC
  73 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  74 #undef  ENDFILE_SPEC
  75 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  76 #undef  LINK_SPEC
  77 #define LINK_SPEC VXWORKS_LINK_SPEC
  78
  79 #undef  SUBTARGET_SWITCHES
  80 #define SUBTARGET_SWITCHES EXTRA_SUBTARGET_SWITCHES
  81
  82 #undef SUBTARGET_OVERRIDE_OPTIONS
  83 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
  84
  85 /* No _mcount profiling on VxWorks.  */
  86 #undef FUNCTION_PROFILER
  87 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
  88
  89 /* We cannot use PC-relative accesses for VxWorks PIC because there is no
  90    fixed gap between segments.  */
  91 #undef ASM_PREFERRED_EH_DATA_FORMAT
  92
  93 /* Define this to be nonzero if static stack checking is supported.  */
  94 #define STACK_CHECK_STATIC_BUILTIN 1
  95
  96 /* This platform supports the probing method of stack checking (RTP mode).
  97    8K is reserved in the stack to propagate exceptions in case of overflow.
  98    On 64-bit targets, we double that size.  */
  99 #if TARGET_64BIT_DEFAULT
 100 #define STACK_CHECK_PROTECT 16384
 101 #else
 102 #define STACK_CHECK_PROTECT 8192
 103 #endif