gcc/config/rs6000/vxworks.h

   1 /* Definitions of target machine for GNU compiler.  Vxworks PowerPC version.
   2    Copyright (C) 1996, 2000, 2002, 2003, 2004, 2005, 2007, 2009
   3    Free Software Foundation, Inc.
   4    Contributed by CodeSourcery, LLC.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 /* Note to future editors: VxWorks is mostly an EABI target.  We do
  23    not use rs6000/eabi.h because we would have to override most of
  24    it anyway.  However, if you change that file, consider making
  25    analogous changes here too.  */
  26
  27 #undef TARGET_VERSION
  28 #define TARGET_VERSION fprintf (stderr, " (PowerPC VxWorks)");
  29
  30 /* CPP predefined macros.  */
  31
  32 #undef TARGET_OS_CPP_BUILTINS
  33 #define TARGET_OS_CPP_BUILTINS()                \
  34   do                                            \
  35     {                                           \
  36       builtin_define ("__ppc");                 \
  37       builtin_define ("__EABI__");              \
  38       builtin_define ("__ELF__");               \
  39       builtin_define ("__vxworks");             \
  40       builtin_define ("__VXWORKS__");           \
  41       if (!TARGET_SOFT_FLOAT)                   \
  42         builtin_define ("__hardfp");            \
  43                                                 \
  44       /* C89 namespace violation! */            \
  45       builtin_define ("CPU_FAMILY=PPC");        \
  46     }                                           \
  47   while (0)
  48
  49 /* Only big endian PPC is supported by VxWorks.  */
  50 #undef BYTES_BIG_ENDIAN
  51 #define BYTES_BIG_ENDIAN 1
  52
  53 /* We have to kill off the entire specs set created by rs6000/sysv4.h
  54    and substitute our own set.  The top level vxworks.h has done some
  55    of this for us.  */
  56
  57 #undef SUBTARGET_EXTRA_SPECS
  58 #undef CPP_SPEC
  59 #undef CC1_SPEC
  60 #undef ASM_SPEC
  61
  62 #define SUBTARGET_EXTRA_SPECS /* none needed */
  63
  64 /* FIXME: The only reason we allow no -mcpu switch at all is because
  65    config-ml.in insists on a "." multilib. */
  66 #define CPP_SPEC \
  67 "%{!DCPU=*:               \
  68    %{mcpu=403 : -DCPU=PPC403  ; \
  69      mcpu=405 : -DCPU=PPC405  ; \
  70      mcpu=440 : -DCPU=PPC440  ; \
  71      mcpu=464 : -DCPU=PPC464  ; \
  72      mcpu=476 : -DCPU=PPC476  ; \
  73      mcpu=603 : -DCPU=PPC603  ; \
  74      mcpu=604 : -DCPU=PPC604  ; \
  75      mcpu=860 : -DCPU=PPC860  ; \
  76      mcpu=8540: -DCPU=PPC85XX ; \
  77               : -DCPU=PPC604  }}" \
  78 VXWORKS_ADDITIONAL_CPP_SPEC
  79
  80 #define CC1_SPEC                                                \
  81 "%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default}      \
  82  %{mlittle|mlittle-endian:-mstrict-align}                       \
  83  %{profile: -p}         \
  84  %{fvec:-maltivec} %{fvec-eabi:-maltivec -mabi=altivec}"
  85
  86 #define ASM_SPEC \
  87 "%(asm_cpu) \
  88  %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
  89  %{v:-v} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
  90  %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} -mbig"
  91
  92 #undef  LIB_SPEC
  93 #define LIB_SPEC VXWORKS_LIB_SPEC
  94 #undef  LINK_SPEC
  95 #define LINK_SPEC VXWORKS_LINK_SPEC
  96 #undef  STARTFILE_SPEC
  97 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  98 #undef  ENDFILE_SPEC
  99 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
 100
 101 /* There is no default multilib.  */
 102 #undef MULTILIB_DEFAULTS
 103
 104 #undef TARGET_DEFAULT
 105 #define TARGET_DEFAULT \
 106   (MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_EABI | MASK_STRICT_ALIGN)
 107
 108 #undef PROCESSOR_DEFAULT
 109 #define PROCESSOR_DEFAULT PROCESSOR_PPC604
 110
 111 /* Nor sdata, for kernel mode.  We use this in
 112    SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized.  */
 113 #undef SDATA_DEFAULT_SIZE
 114 #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0)
 115
 116 #undef  STACK_BOUNDARY
 117 #define STACK_BOUNDARY (16*BITS_PER_UNIT)
 118 /* Override sysv4.h, reset to the default.  */
 119 #undef  PREFERRED_STACK_BOUNDARY
 120
 121 /* Make -mcpu=8540 imply SPE.  ISEL is automatically enabled, the
 122    others must be done by hand.  Handle -mrtp.  Disable -fPIC
 123    for -mrtp - the VxWorks PIC model is not compatible with it.  */
 124 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
 125 #define SUBSUBTARGET_OVERRIDE_OPTIONS           \
 126   do {                                          \
 127     if (TARGET_E500)                            \
 128       {                                         \
 129         rs6000_spe = 1;                         \
 130         rs6000_spe_abi = 1;                     \
 131         rs6000_float_gprs = 1;                  \
 132       }                                         \
 133                                                 \
 134   if (!g_switch_set)                            \
 135     g_switch_value = SDATA_DEFAULT_SIZE;        \
 136   VXWORKS_OVERRIDE_OPTIONS;                     \
 137   } while (0)
 138
 139 /* No _mcount profiling on VxWorks.  */
 140 #undef FUNCTION_PROFILER
 141 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)