| 1 | /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger. |
| 2 | Copyright (C) 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 BIG_ENDIAN |
| 21 | |
| 22 | #define HAVE_WAIT_STRUCT |
| 23 | |
| 24 | /* Get rid of any system-imposed stack limit if possible. */ |
| 25 | |
| 26 | #define SET_STACK_LIMIT_HUGE |
| 27 | |
| 28 | /* We can't use "isatty" or "fileno" on this machine. This isn't good, |
| 29 | but it will have to do. */ |
| 30 | #define ISATTY(FP) ((FP) == stdin || (FP) == stdout) |
| 31 | |
| 32 | /* THis is the amount to subtract from u.u_ar0 |
| 33 | to get the offset in the core file of the register values. */ |
| 34 | |
| 35 | #define KERNEL_U_ADDR UADDR |
| 36 | |
| 37 | /* The offsets in this macro are from /usr/include/machine/reg.h */ |
| 38 | |
| 39 | #define REGISTER_U_ADDR(addr, blockend, regno) \ |
| 40 | { static char offsets[] = { \ |
| 41 | /*d0-d7:*/1,2,3,4,5,6,7,8, \ |
| 42 | /*a0-a6:*/9,10,11,12,13,14,15, /*sp:*/-4, /*ps:*/0, /*pc:*/-1, \ |
| 43 | /*fp0-fp7:*/19,22,25,28,31,34,37,40, /*fpc:*/16,17,18 }; \ |
| 44 | addr = blockend + 4 * offsets[regno]; \ |
| 45 | } |
| 46 | |
| 47 | /* Compensate for lack of `vprintf' function. */ |
| 48 | #define MISSING_VPRINTF |
| 49 | |
| 50 | /* NewsOS 3 apparently dies on large alloca's -- roland@ai.mit.edu. */ |
| 51 | #define BROKEN_LARGE_ALLOCA |
| 52 | |
| 53 | \f |
| 54 | /* Interface definitions for kernel debugger KDB. */ |
| 55 | |
| 56 | /* Use GNU assembler instead of standard assembler */ |
| 57 | #define USE_GAS |
| 58 | |
| 59 | /* Motorola assembly format */ |
| 60 | #ifndef USE_GAS |
| 61 | #define MOTOROLA |
| 62 | #endif |
| 63 | |
| 64 | /* Map machine fault codes into signal numbers. |
| 65 | First subtract 0, divide by 4, then index in a table. |
| 66 | Faults for which the entry in this table is 0 |
| 67 | are not handled by KDB; the program's own trap handler |
| 68 | gets to handle then. */ |
| 69 | |
| 70 | #define FAULT_CODE_ORIGIN 0 |
| 71 | #define FAULT_CODE_UNITS 4 |
| 72 | #define FAULT_TABLE \ |
| 73 | { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \ |
| 74 | 0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \ |
| 75 | 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 76 | SIGILL } |
| 77 | |
| 78 | /* Start running with a stack stretching from BEG to END. |
| 79 | BEG and END should be symbols meaningful to the assembler. |
| 80 | This is used only for kdb. */ |
| 81 | |
| 82 | #ifdef MOTOROLA |
| 83 | #define INIT_STACK(beg, end) \ |
| 84 | { asm (".globl end"); \ |
| 85 | asm ("move.l $ end, sp"); \ |
| 86 | asm ("clr.l fp"); } |
| 87 | #else |
| 88 | #define INIT_STACK(beg, end) \ |
| 89 | { asm (".globl end"); \ |
| 90 | asm ("movel $ end, sp"); \ |
| 91 | asm ("clrl fp"); } |
| 92 | #endif |
| 93 | |
| 94 | /* Push the frame pointer register on the stack. */ |
| 95 | #ifdef MOTOROLA |
| 96 | #define PUSH_FRAME_PTR \ |
| 97 | asm ("move.l fp, -(sp)"); |
| 98 | #else |
| 99 | #define PUSH_FRAME_PTR \ |
| 100 | asm ("movel fp, -(sp)"); |
| 101 | #endif |
| 102 | |
| 103 | /* Copy the top-of-stack to the frame pointer register. */ |
| 104 | #ifdef MOTOROLA |
| 105 | #define POP_FRAME_PTR \ |
| 106 | asm ("move.l (sp), fp"); |
| 107 | #else |
| 108 | #define POP_FRAME_PTR \ |
| 109 | asm ("movl (sp), fp"); |
| 110 | #endif |
| 111 | |
| 112 | /* After KDB is entered by a fault, push all registers |
| 113 | that GDB thinks about (all NUM_REGS of them), |
| 114 | so that they appear in order of ascending GDB register number. |
| 115 | The fault code will be on the stack beyond the last register. */ |
| 116 | |
| 117 | #ifdef MOTOROLA |
| 118 | #define PUSH_REGISTERS \ |
| 119 | { asm ("clr.w -(sp)"); \ |
| 120 | asm ("pea (10,sp)"); \ |
| 121 | asm ("movem $ 0xfffe,-(sp)"); } |
| 122 | #else |
| 123 | #define PUSH_REGISTERS \ |
| 124 | { asm ("clrw -(sp)"); \ |
| 125 | asm ("pea 10(sp)"); \ |
| 126 | asm ("movem $ 0xfffe,-(sp)"); } |
| 127 | #endif |
| 128 | |
| 129 | /* Assuming the registers (including processor status) have been |
| 130 | pushed on the stack in order of ascending GDB register number, |
| 131 | restore them and return to the address in the saved PC register. */ |
| 132 | |
| 133 | #ifdef MOTOROLA |
| 134 | #define POP_REGISTERS \ |
| 135 | { asm ("subi.l $8,28(sp)"); \ |
| 136 | asm ("movem (sp),$ 0xffff"); \ |
| 137 | asm ("rte"); } |
| 138 | #else |
| 139 | #define POP_REGISTERS \ |
| 140 | { asm ("subil $8,28(sp)"); \ |
| 141 | asm ("movem (sp),$ 0xffff"); \ |
| 142 | asm ("rte"); } |
| 143 | #endif |