gcc/config/arm/bpabi.h

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