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1 | /* Parameters for execution on a 3b1. |
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 BIG_ENDIAN | |
21 | ||
22 | #define HAVE_TERMIO | |
23 | #define USG | |
24 | ||
25 | /* This is the amount to subtract from u.u_ar0 | |
26 | to get the offset in the core file of the register values. */ | |
27 | ||
28 | #define KERNEL_U_ADDR 0x70000 | |
29 | ||
30 | #define REGISTER_U_ADDR(addr, blockend, regno) \ | |
31 | { addr = blockend + regno * 4; } | |
32 | \f | |
33 | /* Interface definitions for kernel debugger KDB. */ | |
34 | ||
35 | /* Map machine fault codes into signal numbers. | |
36 | First subtract 0, divide by 4, then index in a table. | |
37 | Faults for which the entry in this table is 0 | |
38 | are not handled by KDB; the program's own trap handler | |
39 | gets to handle then. */ | |
40 | ||
41 | #define FAULT_CODE_ORIGIN 0 | |
42 | #define FAULT_CODE_UNITS 4 | |
43 | #define FAULT_TABLE \ | |
44 | { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \ | |
45 | 0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \ | |
46 | 0, 0, 0, 0, 0, 0, 0, 0, \ | |
47 | SIGILL } | |
48 | ||
49 | /* Start running with a stack stretching from BEG to END. | |
50 | BEG and END should be symbols meaningful to the assembler. | |
51 | This is used only for kdb. */ | |
52 | ||
53 | #define INIT_STACK(beg, end) \ | |
54 | { asm (".globl end"); \ | |
55 | asm ("movel $ end, sp"); \ | |
56 | asm ("clrl fp"); } | |
57 | ||
58 | /* Push the frame pointer register on the stack. */ | |
59 | #define PUSH_FRAME_PTR \ | |
60 | asm ("movel fp, -(sp)"); | |
61 | ||
62 | /* Copy the top-of-stack to the frame pointer register. */ | |
63 | #define POP_FRAME_PTR \ | |
64 | asm ("movl (sp), fp"); | |
65 | ||
66 | /* After KDB is entered by a fault, push all registers | |
67 | that GDB thinks about (all NUM_REGS of them), | |
68 | so that they appear in order of ascending GDB register number. | |
69 | The fault code will be on the stack beyond the last register. */ | |
70 | ||
71 | #define PUSH_REGISTERS \ | |
72 | { asm ("clrw -(sp)"); \ | |
73 | asm ("pea 10(sp)"); \ | |
74 | asm ("movem $ 0xfffe,-(sp)"); } | |
75 | ||
76 | /* Assuming the registers (including processor status) have been | |
77 | pushed on the stack in order of ascending GDB register number, | |
78 | restore them and return to the address in the saved PC register. */ | |
79 | ||
80 | #define POP_REGISTERS \ | |
81 | { asm ("subil $8,28(sp)"); \ | |
82 | asm ("movem (sp),$ 0xffff"); \ | |
83 | asm ("rte"); } | |
84 | ||
85 | #endif |