gcc/config/arm/unknown-elf.h

   1 /* Definitions for non-Linux based ARM systems using ELF
   2    Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   3    Contributed by Catherine Moore <clm@cygnus.com>
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 this program; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* Run-time Target Specification.  */
  23 #ifndef TARGET_VERSION
  24 #define TARGET_VERSION  fputs (" (ARM/ELF non-Linux)", stderr);
  25 #endif
  26
  27 /* Default to using APCS-32 and software floating point.  */
  28 #ifndef TARGET_DEFAULT
  29 #define TARGET_DEFAULT  (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
  30 #endif
  31
  32 /* Now we define the strings used to build the spec file.  */
  33 #define STARTFILE_SPEC  "crtbegin%O%s crt0%O%s"
  34
  35 #define ENDFILE_SPEC    "crtend%O%s"
  36
  37 #define USER_LABEL_PREFIX       ""
  38 #define LOCAL_LABEL_PREFIX      "."
  39
  40 #define TEXT_SECTION "          .text"
  41
  42 #define INVOKE__main
  43
  44 /* Debugging */
  45 #define DWARF_DEBUGGING_INFO
  46 #define DWARF2_DEBUGGING_INFO
  47 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  48
  49 /* Support for Constructors and Destrcutors .  */
  50 #define READONLY_DATA_SECTION   rdata_section
  51
  52 /* A list of other sections which the compiler might be "in" at any
  53    given time.  */
  54 #define SUBTARGET_EXTRA_SECTIONS in_rdata,
  55
  56 /* A list of extra section function definitions.  */
  57 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS       RDATA_SECTION_FUNCTION
  58
  59 #define RDATA_SECTION_ASM_OP    "\t.section .rodata"
  60
  61 #define RDATA_SECTION_FUNCTION                                  \
  62 void                                                            \
  63 rdata_section ()                                                \
  64 {                                                               \
  65   if (in_section != in_rdata)                                   \
  66     {                                                           \
  67       fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP);     \
  68       in_section = in_rdata;                                    \
  69     }                                                           \
  70 }
  71
  72 /* Switch into a generic section.  */
  73 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section
  74
  75 /* The ARM development system defines __main.  */
  76 #define NAME__MAIN "__gccmain"
  77 #define SYMBOL__MAIN __gccmain
  78
  79 /* Return a non-zero value if DECL has a section attribute.  */
  80 #define IN_NAMED_SECTION(DECL)                                          \
  81   ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL)  \
  82    && DECL_SECTION_NAME (DECL) != NULL_TREE)
  83
  84 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
  85
  86 #define UNIQUE_SECTION(DECL, RELOC)                                     \
  87   do                                                                    \
  88     {                                                                   \
  89       int len;                                                          \
  90       int sec;                                                          \
  91       const char * name;                                                \
  92       char * string;                                                    \
  93       char * prefix;                                                    \
  94       static char * prefixes[4][2] =                                    \
  95       {                                                                 \
  96         { ".text.",   ".gnu.linkonce.t." },                             \
  97         { ".rodata.", ".gnu.linkonce.r." },                             \
  98         { ".data.",   ".gnu.linkonce.d." },                             \
  99         { ".bss.",    ".gnu.linkonce.b." }                              \
 100       };                                                                \
 101                                                                         \
 102       if (TREE_CODE (DECL) == FUNCTION_DECL)                            \
 103         sec = 0;                                                        \
 104       else if (DECL_READONLY_SECTION (DECL, RELOC))                     \
 105         sec = 1;                                                        \
 106       else if (DECL_INITIAL (DECL) == NULL_TREE)                        \
 107         sec = 3;                                                        \
 108       else                                                              \
 109         sec = 2;                                                        \
 110                                                                         \
 111       prefix = prefixes[sec][DECL_ONE_ONLY(DECL)];                      \
 112       name   = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));         \
 113                                                                         \
 114       /* Strip off any encoding in name.  */                            \
 115       STRIP_NAME_ENCODING (name, name);                                 \
 116                                                                         \
 117       len    = strlen (name) + strlen (prefix);                         \
 118       string = alloca (len + 1);                                        \
 119                                                                         \
 120       sprintf (string, "%s%s", prefix, name);                           \
 121                                                                         \
 122       DECL_SECTION_NAME (DECL) = build_string (len, string);            \
 123     }                                                                   \
 124   while (0)
 125
 126 #undef  ASM_OUTPUT_ALIGNED_BSS
 127 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 128   do                                                                    \
 129     {                                                                   \
 130       if (IN_NAMED_SECTION (DECL))                                      \
 131         named_section (DECL, NULL, 0);                                  \
 132       else                                                              \
 133         bss_section ();                                                 \
 134                                                                         \
 135       ASM_GLOBALIZE_LABEL (FILE, NAME);                                 \
 136                                                                         \
 137       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
 138                                                                         \
 139       last_assemble_variable_decl = DECL;                               \
 140       ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                       \
 141       ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1);                          \
 142     }                                                                   \
 143   while (0)
 144
 145 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 146 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 147   do                                                                    \
 148     {                                                                   \
 149       if (IN_NAMED_SECTION (DECL))                                      \
 150         named_section (DECL, NULL, 0);                                  \
 151       else                                                              \
 152         bss_section ();                                                 \
 153                                                                         \
 154       ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));      \
 155       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
 156       fprintf (FILE, "\t.space\t%d\n", SIZE);                           \
 157     }                                                                   \
 158   while (0)
 159
 160 #ifndef CPP_APCS_PC_DEFAULT_SPEC
 161 #define CPP_APCS_PC_DEFAULT_SPEC        "-D__APCS_32__"
 162 #endif
 163
 164 #ifndef SUBTARGET_CPU_DEFAULT
 165 #define SUBTARGET_CPU_DEFAULT           TARGET_CPU_arm7tdmi
 166 #endif
 167
 168 /* Now get the routine arm-elf definitions.  */
 169 #include "elf.h"