File:  [DragonFly] / src / contrib / gcc / config / i386 / Attic / openbsd.h
Revision 1.1: download - view: text, annotated - select for diffs
Tue Jun 17 02:44:09 2003 UTC (11 years, 5 months ago) by dillon
Branches: MAIN
CVS tags: HEAD, FREEBSD_4_FORK
import from FreeBSD RELENG_4 1.1.1.2

    1: /* Configuration for an OpenBSD i386 target.
    2:    
    3:    Copyright (C) 1999 Free Software Foundation, Inc.
    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: /* This is tested by i386gas.h.  */
   23: #define YES_UNDERSCORES
   24: 
   25: #include <i386/gstabs.h>
   26: 
   27: /* Get perform_* macros to build libgcc.a.  */
   28: #include <i386/perform.h>
   29: 
   30: /* Get generic OpenBSD definitions.  */
   31: #define OBSD_OLD_GAS
   32: #include <openbsd.h>
   33: 
   34: /* This goes away when the math-emulator is fixed */
   35: #undef TARGET_DEFAULT
   36: #define TARGET_DEFAULT \
   37:   (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
   38: 
   39: /* Run-time target specifications */
   40: #define CPP_PREDEFINES "-D__unix__ -D__i386__ -D__OpenBSD__ -Asystem(unix) -Asystem(OpenBSD) -Acpu(i386) -Amachine(i386)"
   41: 
   42: /* Layout of source language data types.  */
   43: 
   44: /* This must agree with <machine/ansi.h> */
   45: #undef SIZE_TYPE
   46: #define SIZE_TYPE "unsigned int"
   47: 
   48: #undef PTRDIFF_TYPE
   49: #define PTRDIFF_TYPE "int"
   50: 
   51: #undef WCHAR_TYPE
   52: #define WCHAR_TYPE "int"
   53: 
   54: #undef WCHAR_TYPE_SIZE
   55: #define WCHAR_TYPE_SIZE 32
   56: 
   57: /* Assembler format: overall framework.  */
   58: 
   59: #undef ASM_APP_ON
   60: #define ASM_APP_ON "#APP\n"
   61: 
   62: #undef ASM_APP_OFF
   63: #define ASM_APP_OFF "#NO_APP\n"
   64: 
   65: /* The following macros were originally stolen from i386v4.h.
   66:    These have to be defined to get PIC code correct.  */
   67: 
   68: /* Assembler format: dispatch tables.  */
   69: 
   70: /* How to output an element of a case-vector that is relative.
   71:    This is only used for PIC code.  See comments by the `casesi' insn in
   72:    i386.md for an explanation of the expression this outputs.  */
   73: #undef ASM_OUTPUT_ADDR_DIFF_ELT
   74: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
   75:   fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
   76: 
   77: /* Assembler format: sections.  */
   78: 
   79: /* Indicate when jump tables go in the text section.  This is
   80:    necessary when compiling PIC code.  */
   81: #define JUMP_TABLES_IN_TEXT_SECTION  (flag_pic)
   82: 
   83: /* Stack & calling: aggregate returns.  */
   84: 
   85: /* Don't default to pcc-struct-return, because gcc is the only compiler, and
   86:    we want to retain compatibility with older gcc versions.  */
   87: #define DEFAULT_PCC_STRUCT_RETURN 0
   88: 
   89: /* Assembler format: alignment output.  */
   90: 
   91: /* Kludgy test: when gas is upgraded, it will have p2align, and no problems
   92:    with nops.  */
   93: #ifndef HAVE_GAS_MAX_SKIP_P2ALIGN
   94: /* i386 OpenBSD still uses an older gas that doesn't insert nops by default
   95:    when the .align directive demands to insert extra space in the text
   96:    segment.  */
   97: #undef ASM_OUTPUT_ALIGN
   98: #define ASM_OUTPUT_ALIGN(FILE,LOG) \
   99:   if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
  100: #endif
  101: 
  102: /* Stack & calling: profiling.  */
  103: 
  104: /* OpenBSD's profiler recovers all information from the stack pointer.
  105:    The icky part is not here, but in machine/profile.h.  */
  106: #undef FUNCTION_PROFILER
  107: #define FUNCTION_PROFILER(FILE, LABELNO)  \
  108:   fputs (flag_pic ? "\tcall mcount@PLT\n": "\tcall mcount\n", FILE);
  109: 
  110: /* Assembler format: exception region output.  */
  111: 
  112: /* All configurations that don't use elf must be explicit about not using
  113:    dwarf unwind information. egcs doesn't try too hard to check internal
  114:    configuration files...  */
  115: #define DWARF2_UNWIND_INFO 0
  116: 
  117: /* Assembler format: alignment output.  */
  118: 
  119: /* A C statement to output to the stdio stream FILE an assembler
  120:    command to advance the location counter to a multiple of 1<<LOG
  121:    bytes if it is within MAX_SKIP bytes.
  122: 
  123:    This will be used to align code labels according to Intel 
  124:    recommendations, in prevision of binutils upgrade.  */
  125: #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  126: #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)			\
  127:   do {									\
  128:     if ((LOG) != 0) {							\
  129:       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
  130:       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
  131:     }									\
  132:   } while (0)
  133: #endif
  134: 
  135: /* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h.  */
  136: