gcc/config/i386/vxworks.h

   1 /* IA32 VxWorks target definitions for GNU compiler.
   2    Copyright (C) 2003-2020 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 #undef PTRDIFF_TYPE
  39 #define PTRDIFF_TYPE (TARGET_LP64 ? "long int" : "int")
  40
  41 #undef SIZE_TYPE
  42 #define SIZE_TYPE (TARGET_LP64 ? "long unsigned int" : "unsigned int")
  43
  44 #if TARGET_64BIT_DEFAULT
  45 #undef VXWORKS_SYSCALL_LIBS_RTP
  46 #define VXWORKS_SYSCALL_LIBS_RTP "-lsyscall"
  47 #endif
  48
  49 #define TARGET_OS_CPP_BUILTINS()                        \
  50   do                                                    \
  51     {                                                   \
  52       VXWORKS_OS_CPP_BUILTINS ();                       \
  53       if (TARGET_386)                                   \
  54         builtin_define ("CPU=I80386");                  \
  55       else if (TARGET_486)                              \
  56         builtin_define ("CPU=I80486");                  \
  57       else if (TARGET_PENTIUM)                          \
  58         {                                               \
  59           builtin_define ("CPU=PENTIUM");               \
  60           builtin_define ("CPU_VARIANT=PENTIUM");       \
  61         }                                               \
  62       else if (TARGET_PENTIUMPRO)                       \
  63         {                                               \
  64           builtin_define ("CPU=PENTIUM2");              \
  65           builtin_define ("CPU_VARIANT=PENTIUMPRO");    \
  66         }                                               \
  67       else if (TARGET_PENTIUM4)                         \
  68         {                                               \
  69           builtin_define ("CPU=PENTIUM4");              \
  70           builtin_define ("CPU_VARIANT=PENTIUM4");      \
  71         }                                               \
  72       else if (TARGET_64BIT)                            \
  73           builtin_define ("CPU=X86_64");                \
  74       else                                              \
  75           builtin_define ("CPU=I80386");                \
  76     }                                                   \
  77   while (0)
  78
  79 #undef  CPP_SPEC
  80 #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
  81 #undef  LIB_SPEC
  82 #define LIB_SPEC VXWORKS_LIB_SPEC
  83 #undef  STARTFILE_SPEC
  84 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  85 #undef  ENDFILE_SPEC
  86 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  87 #undef  LINK_SPEC
  88 #define LINK_SPEC VXWORKS_LINK_SPEC
  89
  90 #undef  SUBTARGET_SWITCHES
  91 #define SUBTARGET_SWITCHES EXTRA_SUBTARGET_SWITCHES
  92
  93 #undef SUBTARGET_OVERRIDE_OPTIONS
  94 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
  95
  96 /* No _mcount profiling on VxWorks.  */
  97 #undef FUNCTION_PROFILER
  98 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
  99
 100 /* We cannot use PC-relative accesses for VxWorks PIC because there is no
 101    fixed gap between segments.  */
 102 #undef ASM_PREFERRED_EH_DATA_FORMAT
 103
 104 /* Define this to be nonzero if static stack checking is supported.  */
 105 #define STACK_CHECK_STATIC_BUILTIN 1
 106
 107 /* This platform supports the probing method of stack checking (RTP mode).
 108    8K is reserved in the stack to propagate exceptions in case of overflow.
 109    On 64-bit targets, we double that size.  */
 110 #if TARGET_64BIT_DEFAULT
 111 #define STACK_CHECK_PROTECT 16384
 112 #else
 113 #define STACK_CHECK_PROTECT 8192
 114 #endif