gcc/config/arm/bpabi.h

   1 /* Configuration file for ARM BPABI targets.
   2    Copyright (C) 2004-2016 Free Software Foundation, Inc.
   3    Contributed by CodeSourcery, LLC
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 /* Use the AAPCS ABI by default.  */
  27 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS
  28
  29 /* Assume that AAPCS ABIs should adhere to the full BPABI.  */
  30 #define TARGET_BPABI (TARGET_AAPCS_BASED)
  31
  32 /* BPABI targets use EABI frame unwinding tables.  */
  33 #undef ARM_UNWIND_INFO
  34 #define ARM_UNWIND_INFO 1
  35
  36 /* Section 4.1 of the AAPCS requires the use of VFP format.  */
  37 #undef  FPUTYPE_DEFAULT
  38 #define FPUTYPE_DEFAULT "vfp"
  39
  40 /* TARGET_BIG_ENDIAN_DEFAULT is set in
  41    config.gcc for big endian configurations.  */
  42 #if TARGET_BIG_ENDIAN_DEFAULT
  43 #define TARGET_ENDIAN_DEFAULT MASK_BIG_END
  44 #else
  45 #define TARGET_ENDIAN_DEFAULT 0
  46 #endif
  47
  48 /* EABI targets should enable interworking by default.  */
  49 #undef  TARGET_DEFAULT
  50 #define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
  51
  52 /* The ARM BPABI functions return a boolean; they use no special
  53    calling convention.  */
  54 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) TARGET_BPABI
  55
  56 /* The BPABI integer comparison routines return { -1, 0, 1 }.  */
  57 #define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
  58
  59 #define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*"\
  60   "|march=armv4|mcpu=fa526|mcpu=fa626:--fix-v4bx}"
  61
  62 #if TARGET_BIG_ENDIAN_DEFAULT
  63 #define BE8_LINK_SPEC \
  64   " %{!mlittle-endian:%{march=armv7-a|mcpu=cortex-a5    \
  65    |mcpu=cortex-a7                                      \
  66    |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15       \
  67    |mcpu=cortex-a12|mcpu=cortex-a17                     \
  68    |mcpu=cortex-a15.cortex-a7                           \
  69    |mcpu=cortex-a17.cortex-a7                           \
  70    |mcpu=marvell-pj4                                    \
  71    |mcpu=cortex-a32                                     \
  72    |mcpu=cortex-a35                                     \
  73    |mcpu=cortex-a53                                     \
  74    |mcpu=cortex-a57                                     \
  75    |mcpu=cortex-a57.cortex-a53                          \
  76    |mcpu=cortex-a72                                     \
  77    |mcpu=cortex-a72.cortex-a53                          \
  78    |mcpu=cortex-a73                                     \
  79    |mcpu=cortex-a73.cortex-a35                          \
  80    |mcpu=cortex-a73.cortex-a53                          \
  81    |mcpu=exynos-m1                                      \
  82    |mcpu=qdf24xx                                        \
  83    |mcpu=xgene1                                         \
  84    |mcpu=cortex-m1.small-multiply                       \
  85    |mcpu=cortex-m0.small-multiply                       \
  86    |mcpu=cortex-m0plus.small-multiply                   \
  87    |mcpu=generic-armv7-a                                \
  88    |march=armv7ve                                       \
  89    |march=armv7-m|mcpu=cortex-m3                        \
  90    |march=armv7e-m|mcpu=cortex-m4|mcpu=cortex-m7        \
  91    |march=armv6-m|mcpu=cortex-m0                        \
  92    |march=armv8-a                                       \
  93    |march=armv8-a+crc                                   \
  94    |march=armv8.1-a                                     \
  95    |march=armv8.1-a+crc                                 \
  96    |march=armv8.2-a                                     \
  97    |march=armv8.2-a+fp16                                \
  98    |march=armv8-m.base|mcpu=cortex-m23                  \
  99    |march=armv8-m.main                                  \
 100    |march=armv8-m.main+dsp                              \
 101    :%{!r:--be8}}}"
 102 #else
 103 #define BE8_LINK_SPEC \
 104   " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5        \
 105    |mcpu=cortex-a7                                      \
 106    |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15       \
 107    |mcpu=cortex-a12|mcpu=cortex-a17                     \
 108    |mcpu=cortex-a15.cortex-a7                           \
 109    |mcpu=cortex-a17.cortex-a7                           \
 110    |mcpu=cortex-a35                                     \
 111    |mcpu=cortex-a53                                     \
 112    |mcpu=cortex-a57                                     \
 113    |mcpu=cortex-a57.cortex-a53                          \
 114    |mcpu=cortex-a72                                     \
 115    |mcpu=cortex-a72.cortex-a53                          \
 116    |mcpu=cortex-a73                                     \
 117    |mcpu=cortex-a73.cortex-a35                          \
 118    |mcpu=cortex-a73.cortex-a53                          \
 119    |mcpu=exynos-m1                                      \
 120    |mcpu=qdf24xx                                        \
 121    |mcpu=xgene1                                         \
 122    |mcpu=cortex-m1.small-multiply                       \
 123    |mcpu=cortex-m0.small-multiply                       \
 124    |mcpu=cortex-m0plus.small-multiply                   \
 125    |mcpu=marvell-pj4                                    \
 126    |mcpu=generic-armv7-a                                \
 127    |march=armv7ve                                       \
 128    |march=armv7-m|mcpu=cortex-m3                        \
 129    |march=armv7e-m|mcpu=cortex-m4|mcpu=cortex-m7        \
 130    |march=armv6-m|mcpu=cortex-m0                        \
 131    |march=armv8-a                                       \
 132    |march=armv8-a+crc                                   \
 133    |march=armv8.1-a                                     \
 134    |march=armv8.1-a+crc                                 \
 135    |march=armv8.2-a                                     \
 136    |march=armv8.2-a+fp16                                \
 137    |march=armv8-m.base|mcpu=cortex-m23                  \
 138    |march=armv8-m.main                                  \
 139    |march=armv8-m.main+dsp                              \
 140    :%{!r:--be8}}}"
 141 #endif
 142
 143 /* Tell the assembler to build BPABI binaries.  */
 144 #undef  SUBTARGET_EXTRA_ASM_SPEC
 145 #define SUBTARGET_EXTRA_ASM_SPEC \
 146   "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC
 147
 148 #ifndef SUBTARGET_EXTRA_LINK_SPEC
 149 #define SUBTARGET_EXTRA_LINK_SPEC ""
 150 #endif
 151
 152 /* Split out the EABI common values so other targets can use it.  */
 153 #define EABI_LINK_SPEC \
 154   TARGET_FIX_V4BX_SPEC BE8_LINK_SPEC
 155
 156 /* The generic link spec in elf.h does not support shared libraries.  */
 157 #define BPABI_LINK_SPEC \
 158   "%{mbig-endian:-EB} %{mlittle-endian:-EL} "           \
 159   "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} "        \
 160   "-X" SUBTARGET_EXTRA_LINK_SPEC EABI_LINK_SPEC
 161
 162 #undef  LINK_SPEC
 163 #define LINK_SPEC BPABI_LINK_SPEC
 164
 165 /* The BPABI requires that we always use an out-of-line implementation
 166    of RTTI comparison, even if the target supports weak symbols,
 167    because the same object file might be used on a target that does
 168    not support merging symbols across DLL boundaries.  This macro is
 169    broken out separately so that it can be used within
 170    TARGET_OS_CPP_BUILTINS in configuration files for systems based on
 171    the BPABI.  */
 172 #define TARGET_BPABI_CPP_BUILTINS()                     \
 173   do                                                    \
 174     {                                                   \
 175       builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");      \
 176     }                                                   \
 177   while (false)
 178
 179 #undef TARGET_OS_CPP_BUILTINS
 180 #define TARGET_OS_CPP_BUILTINS() \
 181   TARGET_BPABI_CPP_BUILTINS()
 182
 183 /* The BPABI specifies the use of .{init,fini}_array.  Therefore, we
 184    do not want GCC to put anything into the .{init,fini} sections.  */
 185 #undef INIT_SECTION_ASM_OP
 186 #undef FINI_SECTION_ASM_OP
 187 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
 188 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP
 189
 190 /* The legacy _mcount implementation assumes r11 points to a
 191     4-word APCS frame.  This is generally not true for EABI targets,
 192     particularly not in Thumb mode.  We assume the mcount
 193     implementation does not require a counter variable (No Counter).
 194     Note that __gnu_mcount_nc will be entered with a misaligned stack.
 195     This is OK because it uses a special calling convention anyway.  */
 196
 197 #undef  NO_PROFILE_COUNTERS
 198 #define NO_PROFILE_COUNTERS 1
 199 #undef  ARM_FUNCTION_PROFILER
 200 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO)                          \
 201 {                                                                       \
 202   fprintf (STREAM, "\tpush\t{lr}\n");                                   \
 203   fprintf (STREAM, "\tbl\t__gnu_mcount_nc\n");                          \
 204 }
 205
 206 #undef SUBTARGET_FRAME_POINTER_REQUIRED
 207 #define SUBTARGET_FRAME_POINTER_REQUIRED 0
 208
 209 /* __gnu_mcount_nc restores the original LR value before returning.  Ensure
 210    that there is no unnecessary hook set up.  */
 211 #undef PROFILE_HOOK