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