gcc/config/sh/elf.h

   1 /* Definitions of target machine for gcc for Hitachi Super-H using ELF.
   2    Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
   3    Contributed by Ian Lance Taylor <ian@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 GNU CC; 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 /* No SDB debugging info.  */
  23 #undef SDB_DEBUGGING_INFO
  24
  25 /* Generate DWARF2 debugging information and make it the default */
  26 #define DWARF2_DEBUGGING_INFO
  27
  28 #undef PREFERRED_DEBUGGING_TYPE
  29 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  30
  31 /* use a more compact format for line information */
  32 #define DWARF2_ASM_LINE_DEBUG_INFO 1
  33
  34 /* Undefine some macros defined in both sh.h and svr4.h.  */
  35 #undef IDENT_ASM_OP
  36 #undef ASM_FILE_END
  37 #undef ASM_OUTPUT_SOURCE_LINE
  38 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
  39 #undef CTORS_SECTION_ASM_OP
  40 #undef DTORS_SECTION_ASM_OP
  41 #undef ASM_OUTPUT_SECTION_NAME
  42 #undef ASM_OUTPUT_CONSTRUCTOR
  43 #undef ASM_OUTPUT_DESTRUCTOR
  44 #undef ASM_DECLARE_FUNCTION_NAME
  45 #undef MAX_OFILE_ALIGNMENT
  46
  47 /* Be ELF-like.  */
  48 #include "svr4.h"
  49
  50 /* The prefix to add to user-visible assembler symbols.
  51    Note that svr4.h redefined it from the original value (that we want)
  52    in sh.h */
  53
  54 #undef USER_LABEL_PREFIX
  55 #define USER_LABEL_PREFIX "_"
  56
  57 #undef LOCAL_LABEL_PREFIX
  58 #define LOCAL_LABEL_PREFIX "."
  59
  60 #undef ASM_FILE_START
  61 #define ASM_FILE_START(FILE) do {                               \
  62   output_file_directive ((FILE), main_input_filename);          \
  63   if (TARGET_LITTLE_ENDIAN)                                     \
  64     fprintf ((FILE), "\t.little\n");                            \
  65 } while (0)
  66
  67
  68
  69 /* Let code know that this is ELF.  */
  70 #define CPP_PREDEFINES "-D__sh__ -D__ELF__ -Acpu(sh) -Amachine(sh)"
  71
  72 /* Pass -ml and -mrelax to the assembler and linker.  */
  73 #undef ASM_SPEC
  74 #define ASM_SPEC  "%{ml:-little} %{mrelax:-relax}"
  75
  76 #undef LINK_SPEC
  77 #define LINK_SPEC "%{ml:-m shlelf} %{mrelax:-relax}"
  78
  79 /* svr4.h undefined DBX_REGISTER_NUMBER, so we need to define it
  80    again.  */
  81 #define DBX_REGISTER_NUMBER(REGNO)      \
  82   (((REGNO) >= 22 && (REGNO) <= 39) ? ((REGNO) + 1) : (REGNO))
  83
  84 #undef ASM_GENERATE_INTERNAL_LABEL
  85 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
  86   sprintf ((STRING), "*%s%s%ld", LOCAL_LABEL_PREFIX, (PREFIX), (long)(NUM))
  87
  88 #undef ASM_OUTPUT_INTERNAL_LABEL
  89 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
  90   asm_fprintf ((FILE), "%L%s%d:\n", (PREFIX), (NUM))
  91
  92 #undef  ASM_OUTPUT_SOURCE_LINE
  93 #define ASM_OUTPUT_SOURCE_LINE(file, line)                              \
  94 do                                                                      \
  95   {                                                                     \
  96     static int sym_lineno = 1;                                          \
  97     asm_fprintf ((file), ".stabn 68,0,%d,%LLM%d-",                      \
  98              (line), sym_lineno);                                       \
  99     assemble_name ((file),                                              \
 100                    XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
 101     asm_fprintf ((file), "\n%LLM%d:\n", sym_lineno);                    \
 102     sym_lineno += 1;                                                    \
 103   }                                                                     \
 104 while (0)
 105
 106 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
 107 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 108 do {                                                                    \
 109   text_section ();                                                      \
 110   fprintf ((FILE), "\t.stabs \"\",%d,0,0,Letext\nLetext:\n", N_SO);     \
 111 } while (0)
 112
 113 /* Arrange to call __main, rather than using crtbegin.o and crtend.o
 114    and relying on .init and .fini being executed at appropriate times.  */
 115 #undef INIT_SECTION_ASM_OP
 116 #undef FINI_SECTION_ASM_OP
 117 #undef STARTFILE_SPEC
 118 #undef ENDFILE_SPEC
 119
 120 /* HANDLE_SYSV_PRAGMA (defined by svr4.h) takes precedence over HANDLE_PRAGMA.
 121    We want to use the HANDLE_PRAGMA from sh.h.  */
 122 #undef HANDLE_SYSV_PRAGMA