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 #define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*|march=armv4:--fix-v4bx}"
  55
  56 /* Tell the assembler to build BPABI binaries.  */
  57 #undef  SUBTARGET_EXTRA_ASM_SPEC
  58 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=4}" TARGET_FIX_V4BX_SPEC
  59
  60 #ifndef SUBTARGET_EXTRA_LINK_SPEC
  61 #define SUBTARGET_EXTRA_LINK_SPEC ""
  62 #endif
  63
  64 /* The generic link spec in elf.h does not support shared libraries.  */
  65 #define BPABI_LINK_SPEC \
  66   "%{mbig-endian:-EB} %{mlittle-endian:-EL} "           \
  67   "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} "        \
  68   "-X" SUBTARGET_EXTRA_LINK_SPEC TARGET_FIX_V4BX_SPEC
  69
  70 #undef  LINK_SPEC
  71 #define LINK_SPEC BPABI_LINK_SPEC
  72
  73 #if defined (__thumb__)
  74 #define RENAME_LIBRARY_SET ".thumb_set"
  75 #else
  76 #define RENAME_LIBRARY_SET ".set"
  77 #endif
  78
  79 /* Make __aeabi_AEABI_NAME an alias for __GCC_NAME.  */
  80 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME)            \
  81   __asm__ (".globl\t__aeabi_" #AEABI_NAME "\n"          \
  82            RENAME_LIBRARY_SET "\t__aeabi_" #AEABI_NAME  \
  83              ", __" #GCC_NAME "\n");
  84
  85 /* Give some libgcc functions an additional __aeabi name.  */
  86 #ifdef L_muldi3
  87 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  88 #endif
  89 #ifdef L_muldi3
  90 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
  91 #endif
  92 #ifdef L_fixdfdi
  93 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixdfdi, d2lz)
  94 #endif
  95 #ifdef L_fixunsdfdi
  96 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfdi, d2ulz)
  97 #endif
  98 #ifdef L_fixsfdi
  99 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixsfdi, f2lz)
 100 #endif
 101 #ifdef L_fixunssfdi
 102 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfdi, f2ulz)
 103 #endif
 104 #ifdef L_floatdidf
 105 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdidf, l2d)
 106 #endif
 107 #ifdef L_floatdisf
 108 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdisf, l2f)
 109 #endif
 110
 111 /* These renames are needed on ARMv6M.  Other targets get them from
 112    assembly routines.  */
 113 #ifdef L_fixunsdfsi
 114 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfsi, d2uiz)
 115 #endif
 116 #ifdef L_fixunssfsi
 117 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfsi, f2uiz)
 118 #endif
 119 #ifdef L_floatundidf
 120 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundidf, ul2d)
 121 #endif
 122 #ifdef L_floatundisf
 123 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundisf, ul2f)
 124 #endif
 125
 126 /* The BPABI requires that we always use an out-of-line implementation
 127    of RTTI comparison, even if the target supports weak symbols,
 128    because the same object file might be used on a target that does
 129    not support merging symbols across DLL boundaries.  This macro is
 130    broken out separately so that it can be used within
 131    TARGET_OS_CPP_BUILTINS in configuration files for systems based on
 132    the BPABI.  */
 133 #define TARGET_BPABI_CPP_BUILTINS()                     \
 134   do                                                    \
 135     {                                                   \
 136       builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");      \
 137     }                                                   \
 138   while (false)
 139
 140 #undef TARGET_OS_CPP_BUILTINS
 141 #define TARGET_OS_CPP_BUILTINS() \
 142   TARGET_BPABI_CPP_BUILTINS()
 143
 144 /* The BPABI specifies the use of .{init,fini}_array.  Therefore, we
 145    do not want GCC to put anything into the .{init,fini} sections.  */
 146 #undef INIT_SECTION_ASM_OP
 147 #undef FINI_SECTION_ASM_OP
 148 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
 149 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP
 150
 151 /* The legacy _mcount implementation assumes r11 points to a
 152     4-word APCS frame.  This is generally not true for EABI targets,
 153     particularly not in Thumb mode.  We assume the mcount
 154     implementation does not require a counter variable (No Counter).
 155     Note that __gnu_mcount_nc will be entered with a misaligned stack.
 156     This is OK because it uses a special calling convention anyway.  */
 157
 158 #undef  ARM_FUNCTION_PROFILER
 159 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO)                          \
 160 {                                                                       \
 161   fprintf (STREAM, "\tpush\t{lr}\n");                                   \
 162   fprintf (STREAM, "\tbl\t__gnu_mcount_nc\n");                          \
 163 }
 164
 165 #undef SUBTARGET_FRAME_POINTER_REQUIRED
 166 #define SUBTARGET_FRAME_POINTER_REQUIRED 0