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Annotation of gcc/config/i386/sol2.h, revision 1.1.1.1

1.1       root        1: /* Target definitions for GNU compiler for Intel 80386 running Solaris 2
                      2:    Copyright (C) 1993 Free Software Foundation, Inc.
                      3: 
                      4:    Written by Fred Fish ([email protected]).
                      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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     21: 
                     22: #include "i386/sysv4.h"
                     23: 
                     24: /* The Solaris 2.0 x86 linker botches alignment of code sections.
                     25:    It tries to align to a 16 byte boundary by padding with 0x00000090
                     26:    ints, rather than 0x90 bytes (nop).  This generates trash in the
                     27:    ".init" section since the contribution from crtbegin.o is only 7
                     28:    bytes.  The linker pads it to 16 bytes with a single 0x90 byte, and
                     29:    two 0x00000090 ints, which generates a segmentation violation when
                     30:    executed.  This macro forces the assembler to do the padding, since
                     31:    it knows what it is doing. */
                     32: 
                     33: #define FORCE_INIT_SECTION_ALIGN do { asm (ALIGN_ASM_OP ## " 16"); } while (0)

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