gcc/config/arm/conix-elf.h

   1 /* Definitions of target machine for GNU compiler,
   2    for ARM with ConiX OS.
   3    Copyright (C) 2000 Free Software Foundation, Inc.
   4    Contributed by Philip Blundell <pb@futuretv.com>
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC 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 2, or (at your option)
  11 any later version.
  12
  13 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* Run-time Target Specification.  */
  24 #ifndef TARGET_VERSION
  25 #define TARGET_VERSION  fputs (" (ARM/ELF ConiX)", stderr);
  26 #endif
  27
  28 /* Default to using APCS-32 and software floating point.  */
  29 #ifndef TARGET_DEFAULT
  30 #define TARGET_DEFAULT  (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32)
  31 #endif
  32
  33 /* Now we define the strings used to build the spec file.  */
  34 #define STARTFILE_SPEC          "crtbegin%O%s crt0%O%s"
  35
  36 #define ENDFILE_SPEC            "crtend%O%s"
  37
  38 #define USER_LABEL_PREFIX       ""
  39 #define LOCAL_LABEL_PREFIX      "."
  40
  41 #define TEXT_SECTION            "\t.text"
  42
  43 /* Debugging */
  44 #define DWARF2_DEBUGGING_INFO
  45 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  46
  47 /* Support for Constructors and Destructors.  */
  48 #define READONLY_DATA_SECTION   rdata_section
  49
  50 /* A list of other sections which the compiler might be "in" at any
  51    given time.  */
  52 #define SUBTARGET_EXTRA_SECTIONS in_rdata,
  53
  54 /* A list of extra section function definitions.  */
  55 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS       RDATA_SECTION_FUNCTION
  56
  57 #define RDATA_SECTION_ASM_OP    "\t.section .rodata"
  58
  59 #define RDATA_SECTION_FUNCTION                                  \
  60 void                                                            \
  61 rdata_section ()                                                \
  62 {                                                               \
  63   if (in_section != in_rdata)                                   \
  64     {                                                           \
  65       fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP);     \
  66       in_section = in_rdata;                                    \
  67     }                                                           \
  68 }
  69
  70 #define CTOR_LIST_BEGIN                                 \
  71 asm (CTORS_SECTION_ASM_OP);                             \
  72 func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) }
  73
  74 #define CTOR_LIST_END                                   \
  75 asm (CTORS_SECTION_ASM_OP);                             \
  76 func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
  77
  78 #define DTOR_LIST_BEGIN                                 \
  79 asm (DTORS_SECTION_ASM_OP);                             \
  80 func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) }
  81
  82 #define DTOR_LIST_END                                   \
  83 asm (DTORS_SECTION_ASM_OP);                             \
  84 func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
  85
  86 /* A C statement to output something to the assembler file to switch to section
  87    NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
  88    NULL_TREE.  Some target formats do not support arbitrary sections.  Do not
  89    define this macro in such cases.  */
  90 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC)              \
  91   do                                                                    \
  92     {                                                                   \
  93       if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)                  \
  94         fprintf (STREAM, "\t.section %s,\"ax\",@progbits\n", (NAME));   \
  95       else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))           \
  96         fprintf (STREAM, "\t.section %s,\"a\"\n", (NAME));              \
  97       else                                                              \
  98         fprintf (STREAM, "\t.section %s,\"aw\"\n", (NAME));             \
  99     }                                                                   \
 100   while (0)
 101
 102 /* The ARM development system defines __main.  */
 103 #define NAME__MAIN "__gccmain"
 104 #define SYMBOL__MAIN __gccmain
 105
 106 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 107 #define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
 108 #define UNIQUE_SECTION(DECL,RELOC)                              \
 109   do                                                            \
 110     {                                                           \
 111       int len;                                                  \
 112       char * name, * string, * prefix;                          \
 113                                                                 \
 114       name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));   \
 115                                                                 \
 116       if (! DECL_ONE_ONLY (DECL))                               \
 117         {                                                       \
 118           prefix = ".";                                         \
 119           if (TREE_CODE (DECL) == FUNCTION_DECL)                \
 120             prefix = ".text.";                                  \
 121           else if (DECL_READONLY_SECTION (DECL, RELOC))         \
 122             prefix = ".rodata.";                                \
 123           else                                                  \
 124             prefix = ".data.";                                  \
 125         }                                                       \
 126       else if (TREE_CODE (DECL) == FUNCTION_DECL)               \
 127         prefix = ".gnu.linkonce.t.";                            \
 128       else if (DECL_READONLY_SECTION (DECL, RELOC))             \
 129         prefix = ".gnu.linkonce.r.";                            \
 130       else                                                      \
 131         prefix = ".gnu.linkonce.d.";                            \
 132                                                                 \
 133       len = strlen (name) + strlen (prefix);                    \
 134       string = alloca (len + 1);                                \
 135       sprintf (string, "%s%s", prefix, name);                   \
 136                                                                 \
 137       DECL_SECTION_NAME (DECL) = build_string (len, string);    \
 138     }                                                           \
 139   while (0)
 140
 141 #ifndef CPP_APCS_PC_DEFAULT_SPEC
 142 #define CPP_APCS_PC_DEFAULT_SPEC        "-D__APCS_32__"
 143 #endif
 144
 145 #ifndef SUBTARGET_CPU_DEFAULT
 146 #define SUBTARGET_CPU_DEFAULT           TARGET_CPU_arm7tdmi
 147 #endif
 148
 149 #define CPP_PREDEFINES \
 150   "-D__arm__ -D__CONIX__ -Acpu=arm -Amachine=arm -D__ELF__"
 151
 152 /* Now get the routine arm-elf definitions.  */
 153 #include "arm/elf.h"