| /* Common definitions to make GDB run on Vaxen under 4.2bsd and Ultrix. |
| Copyright (C) 1986, 1987, 1989, 1992 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 LITTLE_ENDIAN |
| |
| /* 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 (0x80000000 - (UPAGES * NBPG)) |
| |
| /* Kernel is a bit tenacious about sharing text segments, disallowing bpts. */ |
| #define ONE_PROCESS_WRITETEXT |
| |
| /* 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, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \ |
| 0, 0, SIGTRAP, SIGTRAP, 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) \ |
| { asm (".globl end"); \ |
| asm ("movl $ end, sp"); \ |
| asm ("clrl fp"); } |
| |
| /* Push the frame pointer register on the stack. */ |
| #define PUSH_FRAME_PTR \ |
| asm ("pushl fp"); |
| |
| /* Copy the top-of-stack to the frame pointer register. */ |
| #define POP_FRAME_PTR \ |
| asm ("movl (sp), fp"); |
| |
| /* 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 \ |
| { asm ("pushl 8(sp)"); \ |
| asm ("pushl 8(sp)"); \ |
| asm ("pushal 0x14(sp)"); \ |
| asm ("pushr $037777"); } |
| |
| /* 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 \ |
| { asm ("popr $037777"); \ |
| asm ("subl2 $8,(sp)"); \ |
| asm ("movl (sp),sp"); \ |
| asm ("rei"); } |