1  /* Common definitions for Intel 386 and AMD x86-64 systems using
       2     GNU userspace.  Copyright (C) 2012-2023 Free Software Foundation, Inc.
       3     Contributed by Ilya Enkovich.
       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  /* The svr4 ABI for the i386 says that records and unions are returned
      22     in memory.  In the 64bit compilation we will turn this flag off in
      23     ix86_option_override_internal, as we never do pcc_struct_return
      24     scheme on this target.  */
      25  #undef DEFAULT_PCC_STRUCT_RETURN
      26  #define DEFAULT_PCC_STRUCT_RETURN 1
      27  
      28  /* We arrange for the whole %fs segment to map the tls area.  */
      29  #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
      30  #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
      31  
      32  #define TARGET_OS_CPP_BUILTINS()				\
      33    do								\
      34      {								\
      35  	GNU_USER_TARGET_OS_CPP_BUILTINS();			\
      36      }								\
      37    while (0)
      38  
      39  #undef CPP_SPEC
      40  #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
      41  
      42  #undef GNU_USER_TARGET_CC1_SPEC
      43  #define GNU_USER_TARGET_CC1_SPEC "%(cc1_cpu) %{profile:-p}"
      44  
      45  #undef CC1_SPEC
      46  #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC
      47  
      48  /* Similar to standard GNU userspace, but adding -ffast-math support.  */
      49  #define GNU_USER_TARGET_MATHFILE_SPEC \
      50    "%{mdaz-ftz:crtfastmath.o%s;Ofast|ffast-math|funsafe-math-optimizations:%{!shared:%{!mno-daz-ftz:crtfastmath.o%s}}} \
      51     %{mpc32:crtprec32.o%s} \
      52     %{mpc64:crtprec64.o%s} \
      53     %{mpc80:crtprec80.o%s}"
      54  
      55  #undef  ENDFILE_SPEC
      56  #define ENDFILE_SPEC \
      57    GNU_USER_TARGET_MATHFILE_SPEC " " \
      58    GNU_USER_TARGET_ENDFILE_SPEC
      59  
      60  #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
      61  
      62  /* The stack pointer needs to be moved while checking the stack.  */
      63  #define STACK_CHECK_MOVING_SP 1
      64  
      65  /* Static stack checking is supported by means of probes.  */
      66  #define STACK_CHECK_STATIC_BUILTIN 1
      67  
      68  /* We only build the -fsplit-stack support in libgcc if the
      69     assembler has full support for the CFI directives.  Also
      70     we only support -fsplit-stack on glibc targets.  */
      71  #if (DEFAULT_LIBC == LIBC_GLIBC) && HAVE_GAS_CFI_PERSONALITY_DIRECTIVE
      72  #define TARGET_CAN_SPLIT_STACK
      73  #endif