| /* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 |