gcc/config/i386/gnu-user-common.h

   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