gcc/config/csky/csky-linux-elf.h

   1 /* Declarations for C-SKY targets running Linux.
   2    Copyright (C) 2018-2021 Free Software Foundation, Inc.
   3    Contributed by C-SKY Microsystems and Mentor Graphics.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    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  *               Run-time Target Specification                    *
  23  ******************************************************************/
  24
  25 #undef STARTFILE_SPEC
  26 #define STARTFILE_SPEC                                                        \
  27   "%{!shared: %{pie:Scrt1.o%s;:crt1.o%s}}                                     \
  28   crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  29
  30 #undef ENDFILE_SPEC
  31 #define ENDFILE_SPEC \
  32   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  33
  34 #undef CC1_SPEC
  35 #define CC1_SPEC  \
  36   "%{EB:-EB}      \
  37    %{EL:-EL}      \
  38    %{profile:-p}  \
  39   "
  40
  41 #undef ASM_SPEC
  42 #define ASM_SPEC                \
  43   "%{mbig-endian:-mbig-endian}  \
  44   %{EB:-EB}                     \
  45   %{EL:-EL}                     \
  46   %{fpic|fPIC:-pic}             \
  47   %{mcpu=*:-mcpu=%*}            \
  48   %{march=*:-march=%*}          \
  49   %{mhard-float:-mhard-float}   \
  50   %{mfloat-abi=softfp:-mhard-float} \
  51   %{mfloat-abi=hard:-mhard-float}   \
  52   %{melrw:-melrw}               \
  53   %{mno-elrw:-mno-elrw}         \
  54   %{mistack:-mistack}           \
  55   %{mno-istack:-mno-istack}     \
  56   %{mmp:-mmp}                   \
  57   %{mcp:-mcp}                   \
  58   %{mcache:-mcache}             \
  59   %{msecurity|mmac:-msecurity}  \
  60   %{mtrust:-mtrust}             \
  61   %{mdsp:-mdsp}                 \
  62   %{medsp:-medsp}               \
  63   %{mvdsp:-mvdsp}               \
  64   "
  65
  66 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-cskyv2%{mfloat-abi=hard:-hf}%{mbig-endian:-be}.so.1"
  67
  68 #define LINUX_TARGET_LINK_SPEC  "%{h*} %{version:-v}            \
  69    %{b}                                                         \
  70    %{static:-Bstatic}                                           \
  71    %{shared:-shared}                                            \
  72    %{symbolic:-Bsymbolic}                                       \
  73    %{!static:                                                   \
  74      %{rdynamic:-export-dynamic}                                \
  75      %{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}    \
  76    -X                                                           \
  77    %{mbig-endian:-EB} %{mlittle-endian:-EL}                     \
  78    %{EB:-EB} %{EL:-EL}"
  79
  80
  81 #undef  LINK_SPEC
  82 #define LINK_SPEC LINUX_TARGET_LINK_SPEC
  83
  84
  85 #undef  LIB_SPEC
  86 #define LIB_SPEC \
  87   "%{pthread:-lpthread} -lc %{mccrt:-lcc-rt}"
  88 /* FIXME add this to LIB_SPEC when need */
  89 /*   %{!shared:%{profile:-lc_p}%{!profile:-lc}}" */
  90
  91 #define TARGET_OS_CPP_BUILTINS()            \
  92   do                                        \
  93     {                                       \
  94       GNU_USER_TARGET_OS_CPP_BUILTINS ();   \
  95     }                                       \
  96   while (0)
  97
  98 /* In crtstuff.c to control section in where code resides.
  99    We have to write it as asm code.  */
 100 #ifdef __PIC__
 101 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)  \
 102   asm (SECTION_OP "\n"                              \
 103        "\tgrs\tr3, .Lgetpc_"#FUNC"\n\t"             \
 104        ".Lgetpc_"#FUNC":\n\t"                       \
 105        "\tlrw\tr2,\t.Lgetpc_"#FUNC"@GOTPC\n\t"      \
 106        "\taddu\tr3, r2\n\t"                         \
 107        "\tlrw\tr2, "#FUNC"@GOTOFF\n\t"              \
 108        "\taddu\tr2, r3\n\t"                         \
 109        "\tjsr\tr2\n\t");                            \
 110   FORCE_CODE_SECTION_ALIGN                          \
 111   asm (TEXT_SECTION_ASM_OP);
 112 #endif
 113
 114 #undef CPP_SPEC
 115 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 116
 117 #undef FUNCTION_PROFILER
 118 #define SAVE_LR     \
 119   "push\tlr"
 120 #define FUNCTION_PROFILER(file, labelno)                \
 121   fprintf (file, "\t%s\n\tjbsr\t_mcount\n", SAVE_LR);
 122 #define NO_PROFILE_COUNTERS 1
 123
 124 /* Enable features only for Linux toolchains.  */
 125 #define TARGET_CSKY_LINUX 1
 126
 127 /* Clear the instruction cache from `BEG' to `END'.  */
 128 #define CLEAR_INSN_CACHE(BEG, END)                      \
 129   cacheflush (BEG, END-BEG, 3)
 130
 131 /* For __clear_cache in libgcc2.c.  The declaration is copied from
 132    <sys/cachectl.h>.  */
 133 #ifdef IN_LIBGCC2
 134 extern int cacheflush (void *__addr, const int __nbytes, const int __op);
 135 #endif
 136
 137 /* The SYNC operations are implemented as library functions, not
 138    INSN patterns.  As a result, the HAVE defines for the patterns are
 139    not defined.  We need to define them to generate the corresponding
 140    __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* and __GCC_ATOMIC_*_LOCK_FREE
 141    defines.  */
 142
 143 #define HAVE_sync_compare_and_swapqi 1
 144 #define HAVE_sync_compare_and_swaphi 1
 145 #define HAVE_sync_compare_and_swapsi 1