gcc/config/arc/elf.h

   1 /* Target macros for arc*-elf targets.
   2
   3    Copyright (C) 2017-2021 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef DWARF2_UNWIND_INFO
  22 #define DWARF2_UNWIND_INFO 0
  23
  24 #undef LINK_SPEC
  25 #define LINK_SPEC "%{mbig-endian:-EB} %{EB} %{EL}"
  26
  27 #define ARC_TLS_EXTRA_START_SPEC "crttls.o%s"
  28
  29 #undef SUBTARGET_EXTRA_SPECS
  30 #define SUBTARGET_EXTRA_SPECS \
  31   { "arc_tls_extra_start_spec", ARC_TLS_EXTRA_START_SPEC }, \
  32
  33 #undef STARTFILE_SPEC
  34 #define STARTFILE_SPEC "%{pg|p:gcrt0.o%s}%{!pg:%{!p:crt0.o%s}} crti%O%s " \
  35   "%(arc_tls_extra_start_spec) crtbegin.o%s"
  36
  37 #undef ENDFILE_SPEC
  38 #define ENDFILE_SPEC "crtend.o%s crtn%O%s"
  39
  40 /* Leave the linker script to choose the appropriate libraries.  */
  41 #undef LIB_SPEC
  42 #define LIB_SPEC ""
  43
  44 /* SDATA default for elf.  */
  45 #undef TARGET_SDATA_DEFAULT
  46 #define TARGET_SDATA_DEFAULT 1
  47
  48 /* We no medium calls.  */
  49 #undef TARGET_MMEDIUM_CALLS_DEFAULT
  50 #define TARGET_MMEDIUM_CALLS_DEFAULT 0
  51
  52 #ifdef ARC_MULTILIB_CPU_DEFAULT
  53 # ifndef MULTILIB_DEFAULTS
  54 #  define MULTILIB_DEFAULTS { "mcpu=" ARC_MULTILIB_CPU_DEFAULT }
  55 # endif
  56 #endif
  57
  58 /* Bare-metal toolchains do not need a thread pointer register.  */
  59 #undef TARGET_ARC_TP_REGNO_DEFAULT
  60 #define TARGET_ARC_TP_REGNO_DEFAULT -1
  61
  62 /* Indexed loads are default.  */
  63 #undef TARGET_INDEXED_LOADS_DEFAULT
  64 #define TARGET_INDEXED_LOADS_DEFAULT 1
  65
  66 /* Pre/post modify with register displacement are default.  */
  67 #undef TARGET_AUTO_MODIFY_REG_DEFAULT
  68 #define TARGET_AUTO_MODIFY_REG_DEFAULT 1
  69
  70 /* Build attribute: procedure call standard.  */
  71 #undef ATTRIBUTE_PCS
  72 #define ATTRIBUTE_PCS 2
  73
  74 #undef TARGET_ASM_FILE_END
  75 #define TARGET_ASM_FILE_END arc_file_end
  76
  77 /* If no specs file is enforced, default to nosys libarary.  */
  78 #undef LINK_GCC_C_SEQUENCE_SPEC
  79 #define LINK_GCC_C_SEQUENCE_SPEC                                \
  80   "--start-group %G %{!specs=*:%{!nolibc:-lc -lnosys}} --end-group"
  81
  82 /* Emit rtl for profiling.  Output assembler code to FILE
  83    to call "_mcount" for profiling a function entry.  */
  84 #define PROFILE_HOOK(LABEL)                                     \
  85   {                                                             \
  86     rtx fun;                                                    \
  87     fun = gen_rtx_SYMBOL_REF (Pmode, "__mcount");               \
  88     emit_library_call (fun, LCT_NORMAL, VOIDmode);              \
  89   }
  90
  91 /* Enter/Leave default value.  */
  92 #undef TARGET_CODE_DENSITY_FRAME_DEFAULT
  93 #define TARGET_CODE_DENSITY_FRAME_DEFAULT 0