gcc/config/cris/linux.h

   1 /* Definitions for GCC.  Part of the machine description for CRIS.
   2    Copyright (C) 2001-2020 Free Software Foundation, Inc.
   3    Contributed by Axis Communications.  Written by Hans-Peter Nilsson.
   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
  22 /* After the first "Node:" comment comes all preprocessor directives and
  23    attached declarations described in the info files, the "Using and
  24    Porting GCC" manual (uapgcc), in the same order as found in the "Target
  25    macros" section in the gcc-2.9x CVS edition of 2000-03-17.  FIXME: Not
  26    really, but needs an update anyway.
  27
  28    There is no generic copy-of-uapgcc comment, you'll have to see uapgcc
  29    for that.  If applicable, there is a CRIS-specific comment.  The order
  30    of macro definitions follow the order in the manual.  Every section in
  31    the manual (node in the info pages) has an introductory `Node:
  32    <subchapter>' comment.  If no macros are defined for a section, only
  33    the section-comment is present.  */
  34
  35 /* This file defines the macros for cris-axis-linux-gnu that are not
  36    covered by cris.h, elfos.h and (config/)linux.h.  */
  37
  38 /* Make sure we have a valid TARGET_CPU_DEFAULT, so we can assume it
  39    and take shortcuts below.  */
  40 #ifndef TARGET_CPU_DEFAULT
  41 #error "TARGET_CPU_DEFAULT not defined"
  42 #elif (TARGET_CPU_DEFAULT+0) != 10 && (TARGET_CPU_DEFAULT+0) != 32
  43 #error "TARGET_CPU_DEFAULT must be 10 or 32, or this file be updated"
  44 #endif
  45
  46 /* Node: Instruction Output */
  47
  48 #undef USER_LABEL_PREFIX
  49 #define USER_LABEL_PREFIX ""
  50
  51 /* Node: Driver */
  52 /* These macros are CRIS-specific, but used in target driver macros.  */
  53
  54 #undef CRIS_CPP_SUBTARGET_SPEC
  55 #if TARGET_CPU_DEFAULT == 32
  56 # define CRIS_CPP_SUBTARGET_SPEC \
  57   "%{pthread:-D_REENTRANT}\
  58    %{!march=*:%{!mcpu=*:-D__arch_v32 -D__CRIS_arch_version=32}}"
  59 #else
  60 # define CRIS_CPP_SUBTARGET_SPEC \
  61   "%{pthread:-D_REENTRANT}\
  62    %{!march=*:%{!mcpu=*:-D__arch_v10 -D__CRIS_arch_version=10}}"
  63 #endif
  64
  65 #undef CRIS_CC1_SUBTARGET_SPEC
  66 #if TARGET_CPU_DEFAULT == 32
  67 # define CRIS_CC1_SUBTARGET_SPEC \
  68  "%{!march=*:%{!mcpu=*:-march=v32}}"
  69 #define CRIS_SUBTARGET_DEFAULT_ARCH MASK_AVOID_GOTPLT
  70 #else
  71 # define CRIS_CC1_SUBTARGET_SPEC \
  72  "%{!march=*:%{!mcpu=*:-march=v10}}"
  73 #define CRIS_SUBTARGET_DEFAULT_ARCH 0
  74 #endif
  75
  76 #undef CRIS_ASM_SUBTARGET_SPEC
  77 #if TARGET_CPU_DEFAULT == 32
  78 # define CRIS_ASM_SUBTARGET_SPEC \
  79  "--em=criself \
  80   %{!march=*:%{!mcpu=*:--march=v32}} \
  81   %{!fleading-underscore:--no-underscore}\
  82   %{" FPIE_OR_FPIC_SPEC ": --pic}"
  83 #else
  84 # define CRIS_ASM_SUBTARGET_SPEC \
  85  "--em=criself \
  86   %{!march=*:%{!mcpu=*:--march=v10}} \
  87   %{!fleading-underscore:--no-underscore}\
  88   %{" FPIE_OR_FPIC_SPEC ": --pic}"
  89 #endif
  90
  91 /* Previously controlled by target_flags.  */
  92 #undef TARGET_LINUX
  93 #define TARGET_LINUX 1
  94
  95 #undef CRIS_SUBTARGET_DEFAULT
  96 #define CRIS_SUBTARGET_DEFAULT                  \
  97   (MASK_SVINTO                                  \
  98    + MASK_ETRAX4_ADD                            \
  99    + MASK_ALIGN_BY_32                           \
 100    + CRIS_SUBTARGET_DEFAULT_ARCH)
 101
 102 #undef CRIS_DEFAULT_CPU_VERSION
 103 #define CRIS_DEFAULT_CPU_VERSION CRIS_CPU_NG
 104
 105 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
 106
 107 #undef CRIS_LINK_SUBTARGET_SPEC
 108 #define CRIS_LINK_SUBTARGET_SPEC \
 109  "-mcrislinux\
 110   %{shared} %{static}\
 111   %{symbolic:-Bdynamic} %{static:-Bstatic}\
 112   %{!shared:%{!static:\
 113               %{rdynamic:-export-dynamic}\
 114               -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}\
 115   %{!r:%{O2|O3: --gc-sections}}"
 116
 117
 118 /* Node: Run-time Target */
 119
 120 /* For the cris-*-linux* subtarget.  */
 121 #undef TARGET_OS_CPP_BUILTINS
 122 #define TARGET_OS_CPP_BUILTINS()                \
 123   do                                            \
 124     {                                           \
 125       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
 126       if (flag_leading_underscore <= 0)         \
 127         builtin_define ("__NO_UNDERSCORES__");  \
 128     }                                           \
 129   while (0)
 130
 131 /* Node: Type Layout */
 132
 133 #undef SIZE_TYPE
 134 #define SIZE_TYPE "unsigned int"
 135
 136 #undef PTRDIFF_TYPE
 137 #define PTRDIFF_TYPE "int"
 138
 139 /* Node: Sections */
 140
 141 /* GNU/Linux has crti and crtn and does not need the
 142    CRT_CALL_STATIC_FUNCTION trick in cris.h.  */
 143 #undef CRT_CALL_STATIC_FUNCTION
 144
 145 /*
 146  * Local variables:
 147  * eval: (c-set-style "gnu")
 148  * indent-tabs-mode: t
 149  * End:
 150  */