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- /* 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.
-
- This program 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 2 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 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
-
- /* 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
-
- /* 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
-