| 1 | /* Definitions to make GDB run on an ARM under RISCiX (4.3bsd). |
| 2 | Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #define HOST_BYTE_ORDER LITTLE_ENDIAN |
| 21 | |
| 22 | /* Get rid of any system-imposed stack limit if possible. */ |
| 23 | |
| 24 | #define SET_STACK_LIMIT_HUGE |
| 25 | |
| 26 | /* This is the amount to subtract from u.u_ar0 |
| 27 | to get the offset in the core file of the register values. */ |
| 28 | |
| 29 | #define KERNEL_U_ADDR (0x01000000 - (UPAGES * NBPG)) |
| 30 | |
| 31 | /* Override copies of {fetch,store}_inferior_registers in infptrace.c. */ |
| 32 | #define FETCH_INFERIOR_REGISTERS |
| 33 | |
| 34 | \f |
| 35 | #if 0 |
| 36 | /* Interface definitions for kernel debugger KDB. */ |
| 37 | |
| 38 | /* Map machine fault codes into signal numbers. |
| 39 | First subtract 0, divide by 4, then index in a table. |
| 40 | Faults for which the entry in this table is 0 |
| 41 | are not handled by KDB; the program's own trap handler |
| 42 | gets to handle then. */ |
| 43 | |
| 44 | #define FAULT_CODE_ORIGIN 0 |
| 45 | #define FAULT_CODE_UNITS 4 |
| 46 | #define FAULT_TABLE \ |
| 47 | { 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \ |
| 48 | 0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \ |
| 49 | 0, 0, 0, 0, 0, 0, 0, 0} |
| 50 | |
| 51 | /* Start running with a stack stretching from BEG to END. |
| 52 | BEG and END should be symbols meaningful to the assembler. |
| 53 | This is used only for kdb. */ |
| 54 | |
| 55 | #define INIT_STACK(beg, end) \ |
| 56 | { asm (".globl end"); \ |
| 57 | asm ("movl $ end, sp"); \ |
| 58 | asm ("clrl fp"); } |
| 59 | |
| 60 | /* Push the frame pointer register on the stack. */ |
| 61 | #define PUSH_FRAME_PTR \ |
| 62 | asm ("pushl fp"); |
| 63 | |
| 64 | /* Copy the top-of-stack to the frame pointer register. */ |
| 65 | #define POP_FRAME_PTR \ |
| 66 | asm ("movl (sp), fp"); |
| 67 | |
| 68 | /* After KDB is entered by a fault, push all registers |
| 69 | that GDB thinks about (all NUM_REGS of them), |
| 70 | so that they appear in order of ascending GDB register number. |
| 71 | The fault code will be on the stack beyond the last register. */ |
| 72 | |
| 73 | #define PUSH_REGISTERS \ |
| 74 | { asm ("pushl 8(sp)"); \ |
| 75 | asm ("pushl 8(sp)"); \ |
| 76 | asm ("pushal 0x14(sp)"); \ |
| 77 | asm ("pushr $037777"); } |
| 78 | |
| 79 | /* Assuming the registers (including processor status) have been |
| 80 | pushed on the stack in order of ascending GDB register number, |
| 81 | restore them and return to the address in the saved PC register. */ |
| 82 | |
| 83 | #define POP_REGISTERS \ |
| 84 | { asm ("popr $037777"); \ |
| 85 | asm ("subl2 $8,(sp)"); \ |
| 86 | asm ("movl (sp),sp"); \ |
| 87 | asm ("rei"); } |
| 88 | #endif /* 0 */ |