1  /* Target macros for arc*-elf targets.
       2  
       3     Copyright (C) 2017-2023 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