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f7402c04fa
* standalone.c: Fake getcwd rather than getwd. * xm-*.h: Remove fake values of MAXPATHLEN.
203 lines
5.4 KiB
C
203 lines
5.4 KiB
C
/* Definitions to make GDB run on an Altos 3068 (m68k running SVR2)
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Copyright (C) 1987,1989 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define HOST_BYTE_ORDER BIG_ENDIAN
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/* The altos support would make a good base for a port to other USGR2 systems
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(like the 3b1 and the Convergent miniframe). */
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/* This is only needed in one file, but it's cleaner to put it here than
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putting in more #ifdef's. */
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#include <sys/page.h>
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#include <sys/net.h>
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#define USG
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#define HAVE_TERMIO
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#define CBREAK XTABS /* It takes all kinds... */
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#ifndef R_OK
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#define R_OK 4
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#define W_OK 2
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#define X_OK 1
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#define F_OK 0
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#endif
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/* Get sys/wait.h ie. from a Sun and edit it a little (mc68000 to m68k) */
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/* Why bother? */
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#if 0
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#define HAVE_WAIT_STRUCT
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#endif
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/* This is the amount to subtract from u.u_ar0
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to get the offset in the core file of the register values. */
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#define KERNEL_U_ADDR 0x1fbf000
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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{ if (regno <= SP_REGNUM) \
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addr = blockend + regno * 4; \
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else if (regno == PS_REGNUM) \
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addr = blockend + regno * 4 + 4; \
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else if (regno == PC_REGNUM) \
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addr = blockend + regno * 4 + 2; \
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}
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#define REGISTER_ADDR(u_ar0, regno) \
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(((regno) < PS_REGNUM) \
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? (&((struct exception_stack *) (u_ar0))->e_regs[(regno + R0)]) \
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: (((regno) == PS_REGNUM) \
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? ((int *) (&((struct exception_stack *) (u_ar0))->e_PS)) \
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: (&((struct exception_stack *) (u_ar0))->e_PC)))
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#define FP_REGISTER_ADDR(u, regno) \
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(((char *) \
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(((regno) < FPC_REGNUM) \
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? (&u.u_pcb.pcb_mc68881[FMC68881_R0 + (((regno) - FP0_REGNUM) * 3)]) \
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: (&u.u_pcb.pcb_mc68881[FMC68881_C + ((regno) - FPC_REGNUM)]))) \
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- ((char *) (& u)))
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#ifndef __GNUC__
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#undef USE_GAS
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#define ALTOS_AS
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#else
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#define USE_GAS
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#endif
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/* Motorola assembly format */
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#if !defined(USE_GAS) && !defined(ALTOS)
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#define MOTOROLA
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#endif
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/* Interface definitions for kernel debugger KDB. */
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/* Map machine fault codes into signal numbers.
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First subtract 0, divide by 4, then index in a table.
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Faults for which the entry in this table is 0
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are not handled by KDB; the program's own trap handler
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gets to handle then. */
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#define FAULT_CODE_ORIGIN 0
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#define FAULT_CODE_UNITS 4
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#define FAULT_TABLE \
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{ 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
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0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
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0, 0, 0, 0, 0, 0, 0, 0, \
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SIGILL }
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/* Start running with a stack stretching from BEG to END.
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BEG and END should be symbols meaningful to the assembler.
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This is used only for kdb. */
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#ifdef MOTOROLA
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#define INIT_STACK(beg, end) \
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{ asm (".globl end"); \
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asm ("move.l $ end, sp"); \
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asm ("clr.l fp"); }
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#else
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#ifdef ALTOS_AS
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#define INIT_STACK(beg, end) \
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{ asm ("global end"); \
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asm ("mov.l &end,%sp"); \
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asm ("clr.l %fp"); }
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#else
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#define INIT_STACK(beg, end) \
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{ asm (".globl end"); \
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asm ("movel $ end, sp"); \
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asm ("clrl fp"); }
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#endif
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#endif
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/* Push the frame pointer register on the stack. */
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#ifdef MOTOROLA
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#define PUSH_FRAME_PTR \
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asm ("move.l fp, -(sp)");
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#else
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#ifdef ALTOS_AS
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#define PUSH_FRAME_PTR \
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asm ("mov.l %fp, -(%sp)");
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#else
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#define PUSH_FRAME_PTR \
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asm ("movel fp, -(sp)");
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#endif
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#endif
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/* Copy the top-of-stack to the frame pointer register. */
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#ifdef MOTOROLA
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#define POP_FRAME_PTR \
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asm ("move.l (sp), fp");
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#else
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#ifdef ALTOS_AS
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#define POP_FRAME_PTR \
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asm ("mov.l (%sp), %fp");
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#else
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#define POP_FRAME_PTR \
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asm ("movl (sp), fp");
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#endif
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#endif
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/* After KDB is entered by a fault, push all registers
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that GDB thinks about (all NUM_REGS of them),
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so that they appear in order of ascending GDB register number.
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The fault code will be on the stack beyond the last register. */
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#ifdef MOTOROLA
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#define PUSH_REGISTERS \
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{ asm ("clr.w -(sp)"); \
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asm ("pea (10,sp)"); \
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asm ("movem $ 0xfffe,-(sp)"); }
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#else
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#ifdef ALTOS_AS
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#define PUSH_REGISTERS \
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{ asm ("clr.w -(%sp)"); \
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asm ("pea (10,%sp)"); \
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asm ("movm.l &0xfffe,-(%sp)"); }
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#else
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#define PUSH_REGISTERS \
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{ asm ("clrw -(sp)"); \
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asm ("pea 10(sp)"); \
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asm ("movem $ 0xfffe,-(sp)"); }
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#endif
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#endif
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/* Assuming the registers (including processor status) have been
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pushed on the stack in order of ascending GDB register number,
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restore them and return to the address in the saved PC register. */
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#ifdef MOTOROLA
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#define POP_REGISTERS \
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{ asm ("subi.l $8,28(sp)"); \
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asm ("movem (sp),$ 0xffff"); \
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asm ("rte"); }
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#else
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#ifdef ALTOS_AS
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#define POP_REGISTERS \
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{ asm ("sub.l &8,28(%sp)"); \
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asm ("movem (%sp),&0xffff"); \
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asm ("rte"); }
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#else
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#define POP_REGISTERS \
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{ asm ("subil $8,28(sp)"); \
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asm ("movem (sp),$ 0xffff"); \
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asm ("rte"); }
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#endif
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#endif
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