gcc/config/i386/gnu.h

   1 /* Configuration for an i386 running GNU with ELF as the target machine.  */
   2
   3 /*
   4 Copyright (C) 1994-2024 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #define GNU_USER_LINK_EMULATION "elf_i386"
  23
  24 #undef GNU_USER_DYNAMIC_LINKER
  25 #define GNU_USER_DYNAMIC_LINKER "/lib/ld.so"
  26
  27 #undef  STARTFILE_SPEC
  28 #if defined HAVE_LD_PIE
  29 #define STARTFILE_SPEC \
  30   "%{!shared: %{pg|p|profile:%{static-pie:grcrt0.o%s;static:gcrt0.o%s;:gcrt1.o%s};static-pie:rcrt0.o%s;static:crt0.o%s;" PIE_SPEC ":Scrt1.o%s;:crt1.o%s}} \
  31    crti.o%s %{static:crtbeginT.o%s;shared|static-pie|" PIE_SPEC ":crtbeginS.o%s;:crtbegin.o%s}"
  32 #else
  33 #define STARTFILE_SPEC \
  34   "%{!shared: %{pg|p|profile:%{static:gcrt0.o%s;:gcrt1.o%s};static:crt0.o%s;:crt1.o%s}} \
  35    crti.o%s %{static:crtbeginT.o%s;shared:crtbeginS.o%s;:crtbegin.o%s}"
  36 #endif
  37
  38 #ifdef TARGET_LIBC_PROVIDES_SSP
  39
  40 /* i386 glibc provides __stack_chk_guard in %gs:0x14.  */
  41 #define TARGET_THREAD_SSP_OFFSET        0x14
  42
  43 /* We only build the -fsplit-stack support in libgcc if the
  44    assembler has full support for the CFI directives.  Also
  45    we only support -fsplit-stack on glibc targets.  */
  46 #if (DEFAULT_LIBC == LIBC_GLIBC) && HAVE_GAS_CFI_PERSONALITY_DIRECTIVE
  47 #define TARGET_CAN_SPLIT_STACK
  48 #endif
  49 /* We steal the last transactional memory word.  */
  50 #define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30
  51 #endif