mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/* Macro defintions for i386.
|
||
Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
GDB is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 1, or (at your option)
|
||
any later version.
|
||
|
||
GDB is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GDB; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
/*
|
||
* Changes for 80386 by Pace Willisson (pace@prep.ai.mit.edu)
|
||
* July 1988
|
||
*/
|
||
|
||
#define HOST_BYTE_ORDER LITTLE_ENDIAN
|
||
|
||
/* I'm running gdb 3.4 under 386/ix 2.0.2, which is a derivative of AT&T's
|
||
Sys V/386 3.2.
|
||
|
||
On some machines, gdb crashes when it's starting up while calling the
|
||
vendor's termio tgetent() routine. It always works when run under
|
||
itself (actually, under 3.2, it's not an infinitely recursive bug.)
|
||
After some poking around, it appears that depending on the environment
|
||
size, or whether you're running YP, or the phase of the moon or something,
|
||
the stack is not always long-aligned when main() is called, and tgetent()
|
||
takes strong offense at that. On some machines this bug never appears, but
|
||
on those where it does, it occurs quite reliably. */
|
||
#define ALIGN_STACK_ON_STARTUP
|
||
|
||
/* define USG if you are using sys5 /usr/include's */
|
||
#define USG
|
||
|
||
/* USG systems need these */
|
||
#define vfork() fork()
|
||
#define MAXPATHLEN 500
|
||
|
||
#define HAVE_TERMIO
|
||
|
||
/* Get rid of any system-imposed stack limit if possible. */
|
||
|
||
/* #define SET_STACK_LIMIT_HUGE not in sys5 */
|
||
|
||
/* This is the amount to subtract from u.u_ar0
|
||
to get the offset in the core file of the register values. */
|
||
|
||
#define KERNEL_U_ADDR 0xe0000000
|
||
|
||
|
||
#if 0
|
||
/* Interface definitions for kernel debugger KDB. */
|
||
|
||
/* Map machine fault codes into signal numbers.
|
||
First subtract 0, divide by 4, then index in a table.
|
||
Faults for which the entry in this table is 0
|
||
are not handled by KDB; the program's own trap handler
|
||
gets to handle then. */
|
||
|
||
#define FAULT_CODE_ORIGIN 0
|
||
#define FAULT_CODE_UNITS 4
|
||
#define FAULT_TABLE \
|
||
{ 0, 0, 0, 0, 0, 0, 0, 0, \
|
||
0, 0, 0, 0, 0, 0, 0, 0, \
|
||
0, 0, 0, 0, 0, 0, 0, 0}
|
||
|
||
/* Start running with a stack stretching from BEG to END.
|
||
BEG and END should be symbols meaningful to the assembler.
|
||
This is used only for kdb. */
|
||
|
||
#define INIT_STACK(beg, end) {}
|
||
|
||
/* Push the frame pointer register on the stack. */
|
||
#define PUSH_FRAME_PTR {}
|
||
|
||
/* Copy the top-of-stack to the frame pointer register. */
|
||
#define POP_FRAME_PTR {}
|
||
|
||
/* After KDB is entered by a fault, push all registers
|
||
that GDB thinks about (all NUM_REGS of them),
|
||
so that they appear in order of ascending GDB register number.
|
||
The fault code will be on the stack beyond the last register. */
|
||
|
||
#define PUSH_REGISTERS {}
|
||
|
||
/* Assuming the registers (including processor status) have been
|
||
pushed on the stack in order of ascending GDB register number,
|
||
restore them and return to the address in the saved PC register. */
|
||
|
||
#define POP_REGISTERS {}
|
||
#endif /* 0 */
|