1  /* Definitions of target machine for gcc for Super-H using sh-superh-elf.
       2     Copyright (C) 2001-2023 Free Software Foundation, Inc.
       3  
       4  This file is part of GNU CC.
       5  
       6  GNU CC is free software; you can redistribute it and/or modify
       7  it under the terms of the GNU General Public License as published by
       8  the Free Software Foundation; either version 3, or (at your option)
       9  any later version.
      10  
      11  GNU CC is distributed in the hope that it will be useful,
      12  but WITHOUT ANY WARRANTY; without even the implied warranty of
      13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14  GNU General Public License for more details.
      15  
      16  You should have received a copy of the GNU General Public License
      17  along with GCC; see the file COPYING3.  If not see
      18  <http://www.gnu.org/licenses/>.  */
      19  
      20  
      21  /* This header file is used when the vendor name is set to 'superh'.
      22     config.gcc already configured the compiler for SH4 only and switched
      23     the default endianness to little (although big endian is still available).
      24     This file configures the spec file to the default board configuration
      25     but in such a way that it can be overridden by a boardspecs file
      26     (using the -specs= option). This file is expected to disable the
      27     defaults and provide options --defsym _start and --defsym _stack
      28     which are required by the SuperH configuration of GNU ld.
      29  
      30     This file is intended to override sh.h.  */
      31  
      32  #ifndef _SUPERH_H
      33  #define _SUPERH_H
      34  #endif
      35  
      36  
      37  /* Override the linker spec strings to use the new emulation
      38     The specstrings are concatenated as follows
      39     LINK_EMUL_PREFIX.(''|'32'|'64'|LINK_DEFAULT_CPU_EMUL).SUBTARGET_LINK_EMUL_SUFFIX
      40  */
      41  #undef LINK_EMUL_PREFIX
      42  #undef SUBTARGET_LINK_EMUL_SUFFIX
      43  
      44  #define LINK_EMUL_PREFIX "superh"
      45  #define SUBTARGET_LINK_EMUL_SUFFIX ""
      46  
      47  /* Add the SUBTARGET_LINK_SPEC to add the board and runtime support and
      48     change the endianness */
      49  #undef SUBTARGET_LINK_SPEC
      50  #if  TARGET_ENDIAN_DEFAULT == MASK_LITTLE_ENDIAN
      51  #define SUBTARGET_LINK_SPEC "%(board_link) %(ldruntime) %{ml|!mb:-EL}%{mb:-EB}"
      52  #else
      53  #define SUBTARGET_LINK_SPEC "%(board_link) %(ldruntime) %{ml:-EL}%{mb|!ml:-EB}"
      54  #endif
      55  
      56  
      57  /* This is used by the link spec if the boardspecs file is not used
      58     (for whatever reason).
      59     If the boardspecs file overrides this then an alternative can be used. */
      60  #undef SUBTARGET_EXTRA_SPECS
      61  #define SUBTARGET_EXTRA_SPECS \
      62  { "board_link", "--defsym _start=0x1000 --defsym _stack=0x30000" }, \
      63  { "asruntime", "" }, \
      64  { "cppruntime", "-D__GDB_SIM__" }, \
      65  { "cc1runtime", "" }, \
      66  { "ldruntime", "" }, \
      67  { "libruntime", "-lc -lgloss" }
      68  
      69  
      70  /* Set the SUBTARGET_CPP_SPEC to define __EMBEDDED_CROSS__ which has an effect
      71     on newlib and provide the runtime support */
      72  #undef SUBTARGET_CPP_SPEC
      73  #define SUBTARGET_CPP_SPEC \
      74  "-D__EMBEDDED_CROSS__ %{m4-100*:-D__SH4_100__} %{m4-200*:-D__SH4_200__} %{m4-300*:-D__SH4_300__} %{m4-340:-D__SH4_340__} %{m4-400:-D__SH4_400__} %{m4-500:-D__SH4_500__} \
      75  %(cppruntime)"
      76  
      77  /* Override the SUBTARGET_ASM_SPEC to add the runtime support */
      78  #undef SUBTARGET_ASM_SPEC
      79  #define SUBTARGET_ASM_SPEC "%{m4-100*|m4-200*:-isa=sh4} %{m4-400|m4-340:-isa=sh4-nommu-nofpu} %{m4-500:-isa=sh4-nofpu} %(asruntime)"
      80  
      81  /* Override the SUBTARGET_ASM_RELAX_SPEC so it doesn't interfere with the
      82     runtime support by adding -isa=sh4 in the wrong place.  */
      83  #undef SUBTARGET_ASM_RELAX_SPEC
      84  #define SUBTARGET_ASM_RELAX_SPEC "%{!m4-100*:%{!m4-200*:%{!m4-300*:%{!m4-340:%{!m4-400:%{!m4-500:-isa=sh4}}}}}}"
      85  
      86  /* Create the CC1_SPEC to add the runtime support */
      87  #undef CC1_SPEC
      88  #define CC1_SPEC "%(cc1runtime)"
      89  
      90  #undef CC1PLUS_SPEC
      91  #define CC1PLUS_SPEC "%(cc1runtime)"
      92  
      93  
      94  /* Override the LIB_SPEC to add the runtime support */
      95  #undef LIB_SPEC
      96  #define LIB_SPEC "%{!shared:%{!symbolic:%(libruntime) -lc}} %{pg:-lprofile -lc}"
      97  
      98  /* Override STARTFILE_SPEC to add profiling and MMU support.  */
      99  #undef STARTFILE_SPEC
     100  #define STARTFILE_SPEC \
     101    "%{!shared: %{!m4-400*:%{!m4-340*: %{pg:gcrt1-mmu.o%s}%{!pg:crt1-mmu.o%s}}}} \
     102     %{!shared: %{m4-340*|m4-400*: %{pg:gcrt1.o%s}%{!pg:crt1.o%s}}} \
     103     crti.o%s \
     104     %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"