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c906108c SS |
1 | /* Host support for i386. |
2 | Copyright 1986, 1987, 1989, 1992 Free Software Foundation, Inc. | |
3 | Changes for 80386 by Pace Willisson (pace@prep.ai.mit.edu), July 1988. | |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program 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 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program 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. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #define HOST_BYTE_ORDER LITTLE_ENDIAN | |
23 | ||
24 | /* I'm running gdb 3.4 under 386/ix 2.0.2, which is a derivative of AT&T's | |
c5aa993b JM |
25 | Sys V/386 3.2. |
26 | ||
27 | On some machines, gdb crashes when it's starting up while calling the | |
28 | vendor's termio tgetent() routine. It always works when run under | |
29 | itself (actually, under 3.2, it's not an infinitely recursive bug.) | |
30 | After some poking around, it appears that depending on the environment | |
31 | size, or whether you're running YP, or the phase of the moon or something, | |
32 | the stack is not always long-aligned when main() is called, and tgetent() | |
33 | takes strong offense at that. On some machines this bug never appears, but | |
34 | on those where it does, it occurs quite reliably. */ | |
c906108c SS |
35 | #define ALIGN_STACK_ON_STARTUP |
36 | ||
37 | /* define USG if you are using sys5 /usr/include's */ | |
38 | #define USG | |
39 | ||
40 | #define HAVE_TERMIO | |
41 | ||
42 | /* This is the amount to subtract from u.u_ar0 | |
43 | to get the offset in the core file of the register values. */ | |
44 | ||
45 | #define KERNEL_U_ADDR 0xe0000000 |