gcc/config/arm/unknown-elf.h

   1 /* Definitions for non-Linux based ARM systems using ELF
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Catherine Moore <clm@cygnus.com>
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 /* elfos.h should have already been included.  Now just override
  23    any conflicting definitions and add any extras.  */
  24
  25 /* Run-time Target Specification.  */
  26 #ifndef TARGET_VERSION
  27 #define TARGET_VERSION  fputs (" (ARM/ELF)", stderr);
  28 #endif
  29
  30 /* Default to using software floating point.  */
  31 #ifndef TARGET_DEFAULT
  32 #define TARGET_DEFAULT  (0)
  33 #endif
  34
  35 /* Now we define the strings used to build the spec file.  */
  36 #undef  STARTFILE_SPEC
  37 #define STARTFILE_SPEC  " crti%O%s crtbegin%O%s crt0%O%s"
  38
  39 #undef  ENDFILE_SPEC
  40 #define ENDFILE_SPEC    "crtend%O%s crtn%O%s"
  41
  42 /* The __USES_INITFINI__ define is tested in newlib/libc/sys/arm/crt0.S
  43    to see if it needs to invoked _init() and _fini().  */
  44 #undef  SUBTARGET_CPP_SPEC
  45 #define SUBTARGET_CPP_SPEC  "-D__USES_INITFINI__"
  46
  47 #undef  PREFERRED_DEBUGGING_TYPE
  48 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  49
  50 /* Return a nonzero value if DECL has a section attribute.  */
  51 #define IN_NAMED_SECTION(DECL)                                          \
  52   ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL)  \
  53    && DECL_SECTION_NAME (DECL) != NULL_TREE)
  54
  55 #undef  ASM_OUTPUT_ALIGNED_BSS
  56 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
  57   do                                                                    \
  58     {                                                                   \
  59       if (IN_NAMED_SECTION (DECL))                                      \
  60         switch_to_section (get_named_section (DECL, NULL, 0));          \
  61       else                                                              \
  62         switch_to_section (bss_section);                                \
  63                                                                         \
  64       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
  65                                                                         \
  66       last_assemble_variable_decl = DECL;                               \
  67       ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                       \
  68       ASM_OUTPUT_SKIP (FILE, SIZE ? (int)(SIZE) : 1);                   \
  69     }                                                                   \
  70   while (0)
  71
  72 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
  73 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
  74   do                                                                    \
  75     {                                                                   \
  76       if ((DECL) != NULL && IN_NAMED_SECTION (DECL))                    \
  77         switch_to_section (get_named_section (DECL, NULL, 0));          \
  78       else                                                              \
  79         switch_to_section (bss_section);                                \
  80                                                                         \
  81       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
  82       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
  83       fprintf (FILE, "\t.space\t%d\n", SIZE ? (int)(SIZE) : 1);         \
  84     }                                                                   \
  85   while (0)
  86
  87 #ifndef SUBTARGET_CPU_DEFAULT
  88 #define SUBTARGET_CPU_DEFAULT           TARGET_CPU_arm7tdmi
  89 #endif
  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"