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Annotation of gcc/config/i386/v3gas.h, revision 1.1.1.2

1.1       root        1: /* Definitions for Intel 386 running system V, using gas.
1.1.1.2 ! root        2:    Copyright (C) 1992, 1995 Free Software Foundation, Inc.
1.1       root        3: 
                      4: This file is part of GNU CC.
                      5: 
                      6: GNU CC 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: GNU CC 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 GNU CC; see the file COPYING.  If not, write to
1.1.1.2 ! root       18: the Free Software Foundation, 59 Temple Place - Suite 330,
        !            19: Boston, MA 02111-1307, USA.  */
1.1       root       20: 
1.1.1.2 ! root       21: #include <i386/gas.h>
1.1       root       22: 
                     23: /* Add stuff that normally comes from i386v.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 FRAME_POINTER_REQUIRED
                     41: #define 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", (ROUNDED)); \
                     56:       }                                                        \
                     57:     else                                               \
                     58:       {                                                        \
                     59:        fputs (".lcomm ", (FILE));                      \
                     60:        assemble_name ((FILE), (NAME));                 \
                     61:        fprintf ((FILE), ",%u\n", (ROUNDED));           \
                     62:       }                                                        \
                     63:   } while (0)
                     64: 
                     65: /* Add stuff that normally comes from i386v.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

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