lynx.h revision 169690 
1/* Definitions for LynxOS on i386.
2   Copyright (C) 1993, 1995, 1996, 2002, 2004, 2005
3   Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22#define TARGET_VERSION fputs (" (i386/LynxOS)", stderr);
23
24#define TARGET_OS_CPP_BUILTINS()		\
25  do						\
26    {						\
27      builtin_define ("__LITTLE_ENDIAN__");	\
28      builtin_define ("__x86__");		\
29    }						\
30  while (0)
31
32/* The svr4 ABI for the i386 says that records and unions are returned
33   in memory.  */
34
35#define DEFAULT_PCC_STRUCT_RETURN 1
36
37/* BSS_SECTION_ASM_OP gets defined i386/unix.h.  */
38
39#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
40  asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
41
42/* LynxOS's GDB counts the floating point registers from 16.  */
43
44#undef DBX_REGISTER_NUMBER
45#define DBX_REGISTER_NUMBER(n)						\
46  (TARGET_64BIT ? dbx64_register_map[n]					\
47   : (n) == 0 ? 0							\
48   : (n) == 1 ? 2							\
49   : (n) == 2 ? 1							\
50   : (n) == 3 ? 3							\
51   : (n) == 4 ? 6							\
52   : (n) == 5 ? 7							\
53   : (n) == 6 ? 5							\
54   : (n) == 7 ? 4							\
55   : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) + 8	\
56   : (-1))
57
58/* A C statement to output to the stdio stream FILE an assembler
59   command to advance the location counter to a multiple of 1<<LOG
60   bytes if it is within MAX_SKIP bytes.
61
62   This is used to align code labels according to Intel recommendations.  */
63
64#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
65#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)			\
66  do {									\
67    if ((LOG) != 0) {							\
68      if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
69      else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
70    }									\
71  } while (0)
72#endif
73
74/* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway.  We define it in
75   config/lynx.h.  */
76
77#undef SUBTARGET_EXTRA_SPECS
78
79/* Undefine the definition from att.h to enable our default.  */
80
81#undef ASM_OUTPUT_ALIGN
82
83/* Undefine the definition from elfos.h to enable our default.  */
84
85#undef PREFERRED_DEBUGGING_TYPE
86
87/* The file i386.c defines TARGET_HAVE_TLS unconditionally if
88   HAVE_AS_TLS is defined.  HAVE_AS_TLS is defined as gas support for
89   TLS is detected by configure.  We undefine it here.  */
90
91#undef HAVE_AS_TLS
92