gcc/config/i386/svr3gas.h

   1 /* Definitions for Intel 386 running system V, using gas.
   2    Copyright (C) 1992, 1996, 2000, 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #define TARGET_VERSION fprintf (stderr, " (80386, ATT syntax)");
  22
  23 /* Add stuff that normally comes from i386/sysv3.h */
  24
  25 /* longjmp may fail to restore the registers if called from the same
  26    function that called setjmp.  To compensate, the compiler avoids
  27    putting variables in registers in functions that use both setjmp
  28    and longjmp.  */
  29
  30 #define NON_SAVING_SETJMP \
  31   (current_function_calls_setjmp && current_function_calls_longjmp)
  32
  33 /* longjmp may fail to restore the stack pointer if the saved frame
  34    pointer is the same as the caller's frame pointer.  Requiring a frame
  35    pointer in any function that calls setjmp or longjmp avoids this
  36    problem, unless setjmp and longjmp are called from the same function.
  37    Since a frame pointer will be required in such a function, it is OK
  38    that the stack pointer is not restored.  */
  39
  40 #undef SUBTARGET_FRAME_POINTER_REQUIRED
  41 #define SUBTARGET_FRAME_POINTER_REQUIRED \
  42   (current_function_calls_setjmp || current_function_calls_longjmp)
  43
  44 /* Modify ASM_OUTPUT_LOCAL slightly to test -msvr3-shlib, adapted to gas  */
  45 #undef ASM_OUTPUT_LOCAL
  46 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)     \
  47   do {                                                  \
  48     int align = exact_log2 (ROUNDED);                   \
  49     if (align > 2) align = 2;                           \
  50     if (TARGET_SVR3_SHLIB)                              \
  51       {                                                 \
  52         data_section ();                                \
  53         ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
  54         ASM_OUTPUT_LABEL ((FILE), (NAME));              \
  55         fprintf ((FILE), "\t.set .,.+%u\n", (int)(ROUNDED));    \
  56       }                                                 \
  57     else                                                \
  58       {                                                 \
  59         fputs (".lcomm ", (FILE));                      \
  60         assemble_name ((FILE), (NAME));                 \
  61         fprintf ((FILE), ",%u\n", (int)(ROUNDED));      \
  62       }                                                 \
  63   } while (0)
  64
  65 /* Add stuff that normally comes from i386/sysv3.h via svr3.h */
  66
  67 /* Define the actual types of some ANSI-mandated types.  These
  68    definitions should work for most SVR3 systems.  */
  69
  70 #undef SIZE_TYPE
  71 #define SIZE_TYPE "unsigned int"
  72
  73 #undef PTRDIFF_TYPE
  74 #define PTRDIFF_TYPE "int"
  75
  76 #undef WCHAR_TYPE
  77 #define WCHAR_TYPE "long int"
  78
  79 #undef WCHAR_TYPE_SIZE
  80 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  81 \f
  82 /* ??? This stuff is copied from config/svr3.h.  In the future,
  83    this file should be rewritten to include config/svr3.h
  84    and override what isn't right.  */
  85
  86 #define INIT_SECTION_ASM_OP     "\t.section\t.init"
  87 #define FINI_SECTION_ASM_OP     "\t.section .fini,\"x\""
  88 #define CTORS_SECTION_ASM_OP    INIT_SECTION_ASM_OP
  89 #define DTORS_SECTION_ASM_OP    FINI_SECTION_ASM_OP
  90
  91 /* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent
  92    because they push on the stack.  */
  93 /* This is copied from i386/sysv3.h.  */
  94
  95 #define CTOR_LIST_BEGIN                         \
  96   asm (INIT_SECTION_ASM_OP);                    \
  97   asm ("pushl $0")
  98 #define CTOR_LIST_END CTOR_LIST_BEGIN
  99
 100 /* Constructor list on stack is in reverse order.  Go to the end of the
 101    list and go backwards to call constructors in the right order.  */
 102 #define DO_GLOBAL_CTORS_BODY                                    \
 103 do {                                                            \
 104   func_ptr *p, *beg = alloca (0);                               \
 105   for (p = beg; *p; p++)                                        \
 106     ;                                                           \
 107   while (p != beg)                                              \
 108     (*--p) ();                                                  \
 109 } while (0)
 110
 111 #undef EXTRA_SECTIONS
 112 #define EXTRA_SECTIONS in_init, in_fini
 113
 114 #undef EXTRA_SECTION_FUNCTIONS
 115 #define EXTRA_SECTION_FUNCTIONS                                 \
 116   INIT_SECTION_FUNCTION                                         \
 117   FINI_SECTION_FUNCTION
 118
 119 #define INIT_SECTION_FUNCTION                                   \
 120 void                                                            \
 121 init_section ()                                                 \
 122 {                                                               \
 123   if (in_section != in_init)                                    \
 124     {                                                           \
 125       fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);      \
 126       in_section = in_init;                                     \
 127     }                                                           \
 128 }
 129
 130 #define FINI_SECTION_FUNCTION                                   \
 131 void                                                            \
 132 fini_section ()                                                 \
 133 {                                                               \
 134   if (in_section != in_fini)                                    \
 135     {                                                           \
 136       fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);      \
 137       in_section = in_fini;                                     \
 138     }                                                           \
 139 }
 140
 141 #define TARGET_ASM_CONSTRUCTOR  ix86_svr3_asm_out_constructor