gcc/config/arm/linux-eabi.h

   1 /* Configuration file for ARM GNU/Linux EABI targets.
   2    Copyright (C) 2004, 2005, 2006
   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
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 2, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING.  If not, write to
  20    the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 /* On EABI GNU/Linux, we want both the BPABI builtins and the
  24    GNU/Linux builtins.  */
  25 #undef TARGET_OS_CPP_BUILTINS
  26 #define TARGET_OS_CPP_BUILTINS()                \
  27   do                                            \
  28     {                                           \
  29       TARGET_BPABI_CPP_BUILTINS();              \
  30       LINUX_TARGET_OS_CPP_BUILTINS();           \
  31     }                                           \
  32   while (false)
  33
  34 /* We default to a soft-float ABI so that binaries can run on all
  35    target hardware.  */
  36 #undef TARGET_DEFAULT_FLOAT_ABI
  37 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
  38
  39 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
  40    default.  */
  41 #undef ARM_DEFAULT_ABI
  42 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
  43
  44 /* Default to armv5t so that thumb shared libraries work.
  45    The ARM10TDMI core is the default for armv5t, so set
  46    SUBTARGET_CPU_DEFAULT to achieve this.  */
  47 #undef SUBTARGET_CPU_DEFAULT
  48 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
  49
  50 #undef SUBTARGET_EXTRA_LINK_SPEC
  51 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"
  52
  53 /* Use ld-linux.so.3 so that it will be possible to run "classic"
  54    GNU/Linux binaries on an EABI system.  */
  55 #undef GLIBC_DYNAMIC_LINKER
  56 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.3"
  57
  58 /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
  59    use the GNU/Linux version, not the generic BPABI version.  */
  60 #undef LINK_SPEC
  61 #define LINK_SPEC LINUX_TARGET_LINK_SPEC
  62
  63 /* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
  64    do not use -lfloat.  */
  65 #undef LIBGCC_SPEC
  66
  67 /* Use the AAPCS type for wchar_t, or the previous Linux default for
  68    non-AAPCS.  */
  69 #undef WCHAR_TYPE
  70 #define WCHAR_TYPE (TARGET_AAPCS_BASED ? "unsigned int" : "long int")
  71
  72 /* Clear the instruction cache from `beg' to `end'.  This makes an
  73    inline system call to SYS_cacheflush.  It is modified to work with
  74    both the original and EABI-only syscall interfaces.  */
  75 #undef CLEAR_INSN_CACHE
  76 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  77 {                                                                       \
  78   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);     \
  79   register unsigned long _end __asm ("a2") = (unsigned long) (END);     \
  80   register unsigned long _flg __asm ("a3") = 0;                         \
  81   register unsigned long _scno __asm ("r7") = 0xf0002;                  \
  82   __asm __volatile ("swi 0x9f0002               @ sys_cacheflush"       \
  83                     : "=r" (_beg)                                       \
  84                     : "0" (_beg), "r" (_end), "r" (_flg), "r" (_scno)); \
  85 }