gcc/config/arm/unknown-elf.h

   1 /* Definitions for non-Linux based ARM systems using ELF
   2    Copyright (C) 1998-2017 Free Software Foundation, Inc.
   3    Contributed by Catherine Moore <clm@cygnus.com>
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    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 /* elfos.h should have already been included.  Now just override
  22    any conflicting definitions and add any extras.  */
  23
  24 /* Run-time Target Specification.  */
  25
  26 /* Default to using software floating point.  */
  27 #ifndef TARGET_DEFAULT
  28 #define TARGET_DEFAULT  (0)
  29 #endif
  30
  31 /* Now we define the strings used to build the spec file.  */
  32 #define UNKNOWN_ELF_STARTFILE_SPEC      " crti%O%s crtbegin%O%s crt0%O%s"
  33
  34 #undef  STARTFILE_SPEC
  35 #define STARTFILE_SPEC  \
  36   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "     \
  37   UNKNOWN_ELF_STARTFILE_SPEC
  38
  39 #define UNKNOWN_ELF_ENDFILE_SPEC        "crtend%O%s crtn%O%s"
  40
  41 #undef  ENDFILE_SPEC
  42 #define ENDFILE_SPEC    UNKNOWN_ELF_ENDFILE_SPEC
  43
  44 /* The __USES_INITFINI__ define is tested in newlib/libc/sys/arm/crt0.S
  45    to see if it needs to invoked _init() and _fini().  */
  46 #undef  SUBTARGET_CPP_SPEC
  47 #define SUBTARGET_CPP_SPEC  "-D__USES_INITFINI__"
  48
  49 #undef  PREFERRED_DEBUGGING_TYPE
  50 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  51
  52 /* Return a nonzero value if DECL has a section attribute.  */
  53 #define IN_NAMED_SECTION_P(DECL)                                        \
  54   ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL)  \
  55    && DECL_SECTION_NAME (DECL) != NULL)
  56
  57 #undef  ASM_OUTPUT_ALIGNED_BSS
  58 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
  59   do                                                                    \
  60     {                                                                   \
  61       if (IN_NAMED_SECTION_P (DECL))                                    \
  62         switch_to_section (get_named_section (DECL, NULL, 0));          \
  63       else                                                              \
  64         switch_to_section (bss_section);                                \
  65                                                                         \
  66       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
  67                                                                         \
  68       last_assemble_variable_decl = DECL;                               \
  69       ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                       \
  70       ASM_OUTPUT_SKIP (FILE, SIZE ? (int)(SIZE) : 1);                   \
  71     }                                                                   \
  72   while (0)
  73
  74 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
  75 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
  76   do                                                                    \
  77     {                                                                   \
  78       if ((DECL) != NULL && IN_NAMED_SECTION_P (DECL))                  \
  79         switch_to_section (get_named_section (DECL, NULL, 0));          \
  80       else                                                              \
  81         switch_to_section (bss_section);                                \
  82                                                                         \
  83       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
  84       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
  85       fprintf (FILE, "\t.space\t%d\n", SIZE ? (int) SIZE : 1);          \
  86       fprintf (FILE, "\t.size\t%s, %d\n",                               \
  87                NAME, SIZE ? (int) SIZE : 1);                            \
  88     }                                                                   \
  89   while (0)
  90
  91 /* The libgcc udivmod functions may throw exceptions.  If newlib is
  92    configured to support long longs in I/O, then printf will depend on
  93    udivmoddi4, which will depend on the exception unwind routines,
  94    which will depend on abort, which is defined in libc.  */
  95 #undef LINK_GCC_C_SEQUENCE_SPEC
  96 #define LINK_GCC_C_SEQUENCE_SPEC "--start-group %G %L --end-group"