gcc/config/arm/bpabi.h

   1 /* Configuration file for ARM BPABI targets.
   2    Copyright (C) 2004, 2005, 2007
   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 /* EABI targets should enable interworking by default.  */
  36 #undef TARGET_DEFAULT
  37 #define TARGET_DEFAULT MASK_INTERWORK
  38
  39 /* The ARM BPABI functions return a boolean; they use no special
  40    calling convention.  */
  41 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) TARGET_BPABI
  42
  43 /* The BPABI integer comparison routines return { -1, 0, 1 }.  */
  44 #define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
  45
  46 /* Tell the assembler to build BPABI binaries.  */
  47 #undef SUBTARGET_EXTRA_ASM_SPEC
  48 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=4}"
  49
  50 /* The generic link spec in elf.h does not support shared libraries.  */
  51 #undef LINK_SPEC
  52 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} "           \
  53   "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} "        \
  54   "-X"
  55
  56 #if defined (__thumb__)
  57 #define RENAME_LIBRARY_SET ".thumb_set"
  58 #else
  59 #define RENAME_LIBRARY_SET ".set"
  60 #endif
  61
  62 /* Make __aeabi_AEABI_NAME an alias for __GCC_NAME.  */
  63 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME)            \
  64   __asm__ (".globl\t__aeabi_" #AEABI_NAME "\n"          \
  65            RENAME_LIBRARY_SET "\t__aeabi_" #AEABI_NAME  \
  66              ", __" #GCC_NAME "\n");
  67
  68 /* Give some libgcc functions an additional __aeabi name.  */
  69 #ifdef L_muldi3
  70 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  71 #endif
  72 #ifdef L_muldi3
  73 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  74 #endif
  75 #ifdef L_fixdfdi
  76 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixdfdi, d2lz)
  77 #endif
  78 #ifdef L_fixunsdfdi
  79 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfdi, d2ulz)
  80 #endif
  81 #ifdef L_fixsfdi
  82 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixsfdi, f2lz)
  83 #endif
  84 #ifdef L_fixunssfdi
  85 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfdi, f2ulz)
  86 #endif
  87 #ifdef L_floatdidf
  88 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdidf, l2d)
  89 #endif
  90 #ifdef L_floatdisf
  91 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdisf, l2f)
  92 #endif
  93
  94 /* The BPABI requires that we always use an out-of-line implementation
  95    of RTTI comparison, even if the target supports weak symbols,
  96    because the same object file might be used on a target that does
  97    not support merging symbols across DLL boundaries.  This macro is
  98    broken out separately so that it can be used within
  99    TARGET_OS_CPP_BUILTINS in configuration files for systems based on
 100    the BPABI.  */
 101 #define TARGET_BPABI_CPP_BUILTINS()                     \
 102   do                                                    \
 103     {                                                   \
 104       builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");      \
 105     }                                                   \
 106   while (false)
 107
 108 #undef TARGET_OS_CPP_BUILTINS
 109 #define TARGET_OS_CPP_BUILTINS() \
 110   TARGET_BPABI_CPP_BUILTINS()
 111
 112 /* The BPABI specifies the use of .{init,fini}_array.  Therefore, we
 113    do not want GCC to put anything into the .{init,fini} sections.  */
 114 #undef INIT_SECTION_ASM_OP
 115 #undef FINI_SECTION_ASM_OP
 116 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
 117 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP