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1 | /* Definitions to make GDB run on an ISI Optimum V (3.05) under 4.3bsd. |
2 | Copyright 1987, 1989, 1992 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 | /* This has not been tested on ISI's running BSD 4.2, but it will probably | |
23 | work. */ | |
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 0x10800000*/ | |
29 | #define KERNEL_U_ADDR 0 | |
30 | ||
31 | /* expects blockend to be u.u_ar0 */ | |
32 | extern int rloc[]; /* Defined in isi-dep.c */ | |
33 | #define REGISTER_U_ADDR(addr, blockend, regno) \ | |
34 | { blockend &= UPAGES*NBPG - 1; \ | |
35 | if (regno < 18) addr = (int)blockend + rloc[regno]*4; \ | |
36 | else if (regno < 26) addr = (int) &((struct user *)0)->u_68881_regs \ | |
37 | + (regno - 18) * 12; \ | |
38 | else if (regno < 29) addr = (int) &((struct user *)0)->u_68881_regs \ | |
39 | + 8 * 12 + (regno - 26) * 4; \ | |
40 | } | |
41 | \f | |
42 | /* Interface definitions for kernel debugger KDB. */ | |
43 | ||
44 | /* Map machine fault codes into signal numbers. | |
45 | First subtract 0, divide by 4, then index in a table. | |
46 | Faults for which the entry in this table is 0 | |
47 | are not handled by KDB; the program's own trap handler | |
48 | gets to handle then. */ | |
49 | ||
50 | #define FAULT_CODE_ORIGIN 0 | |
51 | #define FAULT_CODE_UNITS 4 | |
52 | #define FAULT_TABLE \ | |
53 | { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \ | |
54 | 0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \ | |
55 | 0, 0, 0, 0, 0, 0, 0, 0, \ | |
56 | SIGILL } | |
57 | ||
58 | /* Start running with a stack stretching from BEG to END. | |
59 | BEG and END should be symbols meaningful to the assembler. | |
60 | This is used only for kdb. */ | |
61 | ||
62 | #define INIT_STACK(beg, end) \ | |
63 | { asm (".globl end"); \ | |
64 | asm ("movl $ end, sp"); \ | |
65 | asm ("clrl fp"); } | |
66 | ||
67 | /* Push the frame pointer register on the stack. */ | |
68 | #define PUSH_FRAME_PTR \ | |
69 | asm ("movel fp, -(sp)"); | |
70 | ||
71 | /* Copy the top-of-stack to the frame pointer register. */ | |
72 | #define POP_FRAME_PTR \ | |
73 | asm ("movl (sp), fp"); | |
74 | ||
75 | /* After KDB is entered by a fault, push all registers | |
76 | that GDB thinks about (all NUM_REGS of them), | |
77 | so that they appear in order of ascending GDB register number. | |
78 | The fault code will be on the stack beyond the last register. */ | |
79 | ||
80 | #define PUSH_REGISTERS \ | |
81 | { asm ("clrw -(sp)"); \ | |
82 | asm ("pea 10(sp)"); \ | |
83 | asm ("movem $ 0xfffe,-(sp)"); } | |
84 | ||
85 | /* Assuming the registers (including processor status) have been | |
86 | pushed on the stack in order of ascending GDB register number, | |
87 | restore them and return to the address in the saved PC register. */ | |
88 | ||
89 | #define POP_REGISTERS \ | |
90 | { asm ("subil $8,28(sp)"); \ | |
91 | asm ("movem (sp),$ 0xffff"); \ | |
92 | asm ("rte"); } |