gcc/config/arm/bpabi.h

   1 /* Configuration file for ARM BPABI targets.
   2    Copyright (C) 2004, 2005, 2007, 2008
   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 3, 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 COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 /* Use the AAPCS ABI by default.  */
  23 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS
  24
  25 /* Assume that AAPCS ABIs should adhere to the full BPABI.  */
  26 #define TARGET_BPABI (TARGET_AAPCS_BASED)
  27
  28 /* BPABI targets use EABI frame unwinding tables.  */
  29 #define TARGET_UNWIND_INFO 1
  30
  31 /* Section 4.1 of the AAPCS requires the use of VFP format.  */
  32 #undef  FPUTYPE_DEFAULT
  33 #define FPUTYPE_DEFAULT FPUTYPE_VFP
  34
  35 /* TARGET_BIG_ENDIAN_DEFAULT is set in
  36    config.gcc for big endian configurations.  */
  37 #if TARGET_BIG_ENDIAN_DEFAULT
  38 #define TARGET_ENDIAN_DEFAULT MASK_BIG_END
  39 #else
  40 #define TARGET_ENDIAN_DEFAULT 0
  41 #endif
  42
  43 /* EABI targets should enable interworking by default.  */
  44 #undef  TARGET_DEFAULT
  45 #define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
  46
  47 /* The ARM BPABI functions return a boolean; they use no special
  48    calling convention.  */
  49 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) TARGET_BPABI
  50
  51 /* The BPABI integer comparison routines return { -1, 0, 1 }.  */
  52 #define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
  53
  54 /* Tell the assembler to build BPABI binaries.  */
  55 #undef  SUBTARGET_EXTRA_ASM_SPEC
  56 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=4}"
  57
  58 #ifndef SUBTARGET_EXTRA_LINK_SPEC
  59 #define SUBTARGET_EXTRA_LINK_SPEC ""
  60 #endif
  61
  62 /* The generic link spec in elf.h does not support shared libraries.  */
  63 #undef  LINK_SPEC
  64 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} "           \
  65   "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} "        \
  66   "-X" SUBTARGET_EXTRA_LINK_SPEC
  67
  68 #if defined (__thumb__)
  69 #define RENAME_LIBRARY_SET ".thumb_set"
  70 #else
  71 #define RENAME_LIBRARY_SET ".set"
  72 #endif
  73
  74 /* Make __aeabi_AEABI_NAME an alias for __GCC_NAME.  */
  75 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME)            \
  76   __asm__ (".globl\t__aeabi_" #AEABI_NAME "\n"          \
  77            RENAME_LIBRARY_SET "\t__aeabi_" #AEABI_NAME  \
  78              ", __" #GCC_NAME "\n");
  79
  80 /* Give some libgcc functions an additional __aeabi name.  */
  81 #ifdef L_muldi3
  82 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  83 #endif
  84 #ifdef L_muldi3
  85 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  86 #endif
  87 #ifdef L_fixdfdi
  88 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixdfdi, d2lz)
  89 #endif
  90 #ifdef L_fixunsdfdi
  91 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfdi, d2ulz)
  92 #endif
  93 #ifdef L_fixsfdi
  94 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixsfdi, f2lz)
  95 #endif
  96 #ifdef L_fixunssfdi
  97 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfdi, f2ulz)
  98 #endif
  99 #ifdef L_floatdidf
 100 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdidf, l2d)
 101 #endif
 102 #ifdef L_floatdisf
 103 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdisf, l2f)
 104 #endif
 105
 106 /* These renames are needed on ARMv6M.  Other targets get them from
 107    assembly routines.  */
 108 #ifdef L_fixunsdfsi
 109 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfsi, d2uiz)
 110 #endif
 111 #ifdef L_fixunssfsi
 112 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfsi, f2uiz)
 113 #endif
 114 #ifdef L_floatundidf
 115 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundidf, ul2d)
 116 #endif
 117 #ifdef L_floatundisf
 118 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundisf, ul2f)
 119 #endif
 120
 121 /* The BPABI requires that we always use an out-of-line implementation
 122    of RTTI comparison, even if the target supports weak symbols,
 123    because the same object file might be used on a target that does
 124    not support merging symbols across DLL boundaries.  This macro is
 125    broken out separately so that it can be used within
 126    TARGET_OS_CPP_BUILTINS in configuration files for systems based on
 127    the BPABI.  */
 128 #define TARGET_BPABI_CPP_BUILTINS()                     \
 129   do                                                    \
 130     {                                                   \
 131       builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");      \
 132     }                                                   \
 133   while (false)
 134
 135 #undef TARGET_OS_CPP_BUILTINS
 136 #define TARGET_OS_CPP_BUILTINS() \
 137   TARGET_BPABI_CPP_BUILTINS()
 138
 139 /* The BPABI specifies the use of .{init,fini}_array.  Therefore, we
 140    do not want GCC to put anything into the .{init,fini} sections.  */
 141 #undef INIT_SECTION_ASM_OP
 142 #undef FINI_SECTION_ASM_OP
 143 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
 144 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP