209 lines
5.4 KiB
C
209 lines
5.4 KiB
C
|
/* Definitions to make GDB run on an Altos 3068 (m68k running SVR2)
|
|||
|
|
Copyright (C) 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. */
|
|||
|
|
|
|||
|
|
#define HOST_BYTE_ORDER BIG_ENDIAN
|
|||
|
|
|
|||
|
|
/* The altos support would make a good base for a port to other USGR2 systems
|
|||
|
|
(like the 3b1 and the Convergent miniframe). */
|
|||
|
|
|
|||
|
|
/* This is only needed in one file, but it's cleaner to put it here than
|
|||
|
|
putting in more #ifdef's. */
|
|||
|
|
#include <sys/page.h>
|
|||
|
|
#include <sys/net.h>
|
|||
|
|
|
|||
|
|
#define USG
|
|||
|
|
|
|||
|
|
#define HAVE_TERMIO
|
|||
|
|
|
|||
|
|
#define CBREAK XTABS /* It takes all kinds... */
|
|||
|
|
|
|||
|
|
#ifndef R_OK
|
|||
|
|
#define R_OK 4
|
|||
|
|
#define W_OK 2
|
|||
|
|
#define X_OK 1
|
|||
|
|
#define F_OK 0
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#ifndef MAXPATHLEN
|
|||
|
|
#define MAXPATHLEN (1024)
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Get sys/wait.h ie. from a Sun and edit it a little (mc68000 to m68k) */
|
|||
|
|
/* Why bother? */
|
|||
|
|
#if 0
|
|||
|
|
#define HAVE_WAIT_STRUCT
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#define vfork fork
|
|||
|
|
|
|||
|
|
/* 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 0x1fbf000
|
|||
|
|
|
|||
|
|
#define REGISTER_U_ADDR(addr, blockend, regno) \
|
|||
|
|
{ if (regno <= SP_REGNUM) \
|
|||
|
|
addr = blockend + regno * 4; \
|
|||
|
|
else if (regno == PS_REGNUM) \
|
|||
|
|
addr = blockend + regno * 4 + 4; \
|
|||
|
|
else if (regno == PC_REGNUM) \
|
|||
|
|
addr = blockend + regno * 4 + 2; \
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#define REGISTER_ADDR(u_ar0, regno) \
|
|||
|
|
(((regno) < PS_REGNUM) \
|
|||
|
|
? (&((struct exception_stack *) (u_ar0))->e_regs[(regno + R0)]) \
|
|||
|
|
: (((regno) == PS_REGNUM) \
|
|||
|
|
? ((int *) (&((struct exception_stack *) (u_ar0))->e_PS)) \
|
|||
|
|
: (&((struct exception_stack *) (u_ar0))->e_PC)))
|
|||
|
|
|
|||
|
|
#define FP_REGISTER_ADDR(u, regno) \
|
|||
|
|
(((char *) \
|
|||
|
|
(((regno) < FPC_REGNUM) \
|
|||
|
|
? (&u.u_pcb.pcb_mc68881[FMC68881_R0 + (((regno) - FP0_REGNUM) * 3)]) \
|
|||
|
|
: (&u.u_pcb.pcb_mc68881[FMC68881_C + ((regno) - FPC_REGNUM)]))) \
|
|||
|
|
- ((char *) (& u)))
|
|||
|
|
|
|||
|
|
|
|||
|
|
#ifndef __GNUC__
|
|||
|
|
#undef USE_GAS
|
|||
|
|
#define ALTOS_AS
|
|||
|
|
#else
|
|||
|
|
#define USE_GAS
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Motorola assembly format */
|
|||
|
|
#if !defined(USE_GAS) && !defined(ALTOS)
|
|||
|
|
#define MOTOROLA
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* 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, SIGTRAP, 0, 0, 0, \
|
|||
|
|
0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
|
|||
|
|
0, 0, 0, 0, 0, 0, 0, 0, \
|
|||
|
|
SIGILL }
|
|||
|
|
|
|||
|
|
/* 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. */
|
|||
|
|
|
|||
|
|
#ifdef MOTOROLA
|
|||
|
|
#define INIT_STACK(beg, end) \
|
|||
|
|
{ asm (".globl end"); \
|
|||
|
|
asm ("move.l $ end, sp"); \
|
|||
|
|
asm ("clr.l fp"); }
|
|||
|
|
#else
|
|||
|
|
#ifdef ALTOS_AS
|
|||
|
|
#define INIT_STACK(beg, end) \
|
|||
|
|
{ asm ("global end"); \
|
|||
|
|
asm ("mov.l &end,%sp"); \
|
|||
|
|
asm ("clr.l %fp"); }
|
|||
|
|
#else
|
|||
|
|
#define INIT_STACK(beg, end) \
|
|||
|
|
{ asm (".globl end"); \
|
|||
|
|
asm ("movel $ end, sp"); \
|
|||
|
|
asm ("clrl fp"); }
|
|||
|
|
#endif
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Push the frame pointer register on the stack. */
|
|||
|
|
#ifdef MOTOROLA
|
|||
|
|
#define PUSH_FRAME_PTR \
|
|||
|
|
asm ("move.l fp, -(sp)");
|
|||
|
|
#else
|
|||
|
|
#ifdef ALTOS_AS
|
|||
|
|
#define PUSH_FRAME_PTR \
|
|||
|
|
asm ("mov.l %fp, -(%sp)");
|
|||
|
|
#else
|
|||
|
|
#define PUSH_FRAME_PTR \
|
|||
|
|
asm ("movel fp, -(sp)");
|
|||
|
|
#endif
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Copy the top-of-stack to the frame pointer register. */
|
|||
|
|
#ifdef MOTOROLA
|
|||
|
|
#define POP_FRAME_PTR \
|
|||
|
|
asm ("move.l (sp), fp");
|
|||
|
|
#else
|
|||
|
|
#ifdef ALTOS_AS
|
|||
|
|
#define POP_FRAME_PTR \
|
|||
|
|
asm ("mov.l (%sp), %fp");
|
|||
|
|
#else
|
|||
|
|
#define POP_FRAME_PTR \
|
|||
|
|
asm ("movl (sp), fp");
|
|||
|
|
#endif
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* 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. */
|
|||
|
|
|
|||
|
|
#ifdef MOTOROLA
|
|||
|
|
#define PUSH_REGISTERS \
|
|||
|
|
{ asm ("clr.w -(sp)"); \
|
|||
|
|
asm ("pea (10,sp)"); \
|
|||
|
|
asm ("movem $ 0xfffe,-(sp)"); }
|
|||
|
|
#else
|
|||
|
|
#ifdef ALTOS_AS
|
|||
|
|
#define PUSH_REGISTERS \
|
|||
|
|
{ asm ("clr.w -(%sp)"); \
|
|||
|
|
asm ("pea (10,%sp)"); \
|
|||
|
|
asm ("movm.l &0xfffe,-(%sp)"); }
|
|||
|
|
#else
|
|||
|
|
#define PUSH_REGISTERS \
|
|||
|
|
{ asm ("clrw -(sp)"); \
|
|||
|
|
asm ("pea 10(sp)"); \
|
|||
|
|
asm ("movem $ 0xfffe,-(sp)"); }
|
|||
|
|
#endif
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* 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. */
|
|||
|
|
|
|||
|
|
#ifdef MOTOROLA
|
|||
|
|
#define POP_REGISTERS \
|
|||
|
|
{ asm ("subi.l $8,28(sp)"); \
|
|||
|
|
asm ("movem (sp),$ 0xffff"); \
|
|||
|
|
asm ("rte"); }
|
|||
|
|
#else
|
|||
|
|
#ifdef ALTOS_AS
|
|||
|
|
#define POP_REGISTERS \
|
|||
|
|
{ asm ("sub.l &8,28(%sp)"); \
|
|||
|
|
asm ("movem (%sp),&0xffff"); \
|
|||
|
|
asm ("rte"); }
|
|||
|
|
#else
|
|||
|
|
#define POP_REGISTERS \
|
|||
|
|
{ asm ("subil $8,28(sp)"); \
|
|||
|
|
asm ("movem (sp),$ 0xffff"); \
|
|||
|
|
asm ("rte"); }
|
|||
|
|
#endif
|
|||
|
|
#endif
|