gcc/config/i386/vxworks.h

   1 /* IA32 VxWorks target definitions for GNU compiler.
   2    Copyright (C) 2003-2021 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 /* VxWorks after 7 SR0600 use the ELF ABI and the system environment is llvm
  22    based.  Earlier versions have GNU based environment components and use the
  23    same ABI as Solaris 2.  */
  24
  25 #if TARGET_VXWORKS7
  26
  27 #undef VXWORKS_PERSONALITY
  28 #define VXWORKS_PERSONALITY "llvm"
  29
  30 #else
  31
  32 #undef ASM_OUTPUT_ALIGNED_BSS
  33 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  34   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  35
  36 #undef TARGET_SUBTARGET_DEFAULT
  37 #define TARGET_SUBTARGET_DEFAULT \
  38         (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_VECT8_RETURNS)
  39
  40 #undef PTRDIFF_TYPE
  41 #define PTRDIFF_TYPE (TARGET_LP64 ? "long int" : "int")
  42
  43 #undef SIZE_TYPE
  44 #define SIZE_TYPE (TARGET_LP64 ? "long unsigned int" : "unsigned int")
  45
  46 /* We cannot use PC-relative accesses for VxWorks PIC because there is no
  47    fixed gap between segments.  */
  48 #undef ASM_PREFERRED_EH_DATA_FORMAT
  49
  50 #if TARGET_64BIT_DEFAULT
  51 #undef VXWORKS_SYSCALL_LIBS_RTP
  52 #define VXWORKS_SYSCALL_LIBS_RTP "-lsyscall"
  53 #endif
  54
  55 #endif
  56
  57 /* Provide our target specific DBX_REGISTER_NUMBER.  VxWorks relies on
  58    the SVR4 numbering.  */
  59
  60 #undef DBX_REGISTER_NUMBER
  61 #define DBX_REGISTER_NUMBER(n) \
  62   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  63
  64 /* CPU macro definitions, ordered to account for VxWorks 7 not
  65    supporting CPUs older than PENTIUM4 since SR0650.  */
  66
  67 #define VX_CPUDEF(CPU) builtin_define(VX_CPU_PREFIX "CPU=" #CPU)
  68 #define VX_CPUVDEF(CPU) builtin_define(VX_CPU_PREFIX "CPU_VARIANT=" #CPU)
  69
  70 #define TARGET_OS_CPP_BUILTINS()                        \
  71   do                                                    \
  72     {                                                   \
  73       VXWORKS_OS_CPP_BUILTINS ();                       \
  74       if (TARGET_64BIT)                                 \
  75         VX_CPUDEF (X86_64);                             \
  76       else if (TARGET_PENTIUM4)                         \
  77         {                                               \
  78           VX_CPUDEF (PENTIUM4);                         \
  79           VX_CPUVDEF (PENTIUM4);                        \
  80         }                                               \
  81       else if (TARGET_CORE2)                            \
  82         VX_CPUDEF (CORE2);                              \
  83       else if (TARGET_NEHALEM)                          \
  84         VX_CPUDEF (NEHALEM);                            \
  85       else if (TARGET_SANDYBRIDGE)                      \
  86         VX_CPUDEF (SANDYBRIDGE);                        \
  87       else if (TARGET_HASWELL)                          \
  88         VX_CPUDEF (HASWELL);                            \
  89       else if (TARGET_SILVERMONT)                       \
  90         VX_CPUDEF (SILVERMONT);                         \
  91       else if (TARGET_SKYLAKE || TARGET_SKYLAKE_AVX512) \
  92         VX_CPUDEF (SKYLAKE);                            \
  93       else if (TARGET_GOLDMONT)                         \
  94         VX_CPUDEF (GOLDMONT);                           \
  95       else if (TARGET_VXWORKS7)                         \
  96         VX_CPUDEF (PENTIUM4);                           \
  97       else if (TARGET_386)                              \
  98         VX_CPUDEF (I80386);                             \
  99       else if (TARGET_486)                              \
 100         VX_CPUDEF (I80486);                             \
 101       else if (TARGET_PENTIUM)                          \
 102         {                                               \
 103           VX_CPUDEF (PENTIUM);                          \
 104           VX_CPUVDEF (PENTIUM);                         \
 105         }                                               \
 106       else if (TARGET_PENTIUMPRO)                       \
 107         {                                               \
 108           VX_CPUDEF (PENTIUM2);                         \
 109           VX_CPUVDEF (PENTIUMPRO);                      \
 110         }                                               \
 111       else                                              \
 112         VX_CPUDEF (I80386);                             \
 113     }                                                   \
 114   while (0)
 115
 116 #undef  CPP_SPEC
 117 #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
 118 #undef  CC1_SPEC
 119 #define CC1_SPEC VXWORKS_CC1_SPEC
 120 #undef  LIB_SPEC
 121 #define LIB_SPEC VXWORKS_LIB_SPEC
 122 #undef  STARTFILE_SPEC
 123 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
 124 #undef  ENDFILE_SPEC
 125 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
 126 #undef  LINK_SPEC
 127 #define LINK_SPEC VXWORKS_LINK_SPEC
 128
 129 #undef  SUBTARGET_SWITCHES
 130 #define SUBTARGET_SWITCHES EXTRA_SUBTARGET_SWITCHES
 131
 132 #undef SUBTARGET_OVERRIDE_OPTIONS
 133 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
 134
 135 /* No _mcount profiling on VxWorks.  */
 136 #undef FUNCTION_PROFILER
 137 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
 138
 139 /* Define this to be nonzero if static stack checking is supported.  */
 140 #define STACK_CHECK_STATIC_BUILTIN 1
 141
 142 /* This platform supports the probing method of stack checking (RTP mode).
 143    8K is reserved in the stack to propagate exceptions in case of overflow.
 144    On 64-bit targets, we double that size.  */
 145
 146 #define STACK_CHECK_PROTECT (TARGET_64BIT_DEFAULT ? 16 * 1024 : 8 * 1024)