Commit | Line | Data |
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c906108c | 1 | /* Target machine description for VxWorks m68k's, for GDB, the GNU debugger. |
cce74817 | 2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1999 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Support. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c | 21 | |
c906108c SS |
22 | /* GCC is probably the only compiler used on this configuration. So |
23 | get this right even if the code which detects gcc2_compiled. is | |
24 | still broken. */ | |
25 | ||
26 | #define BELIEVE_PCC_PROMOTION 1 | |
27 | ||
28 | /* We have more complex, useful breakpoints on the target. */ | |
29 | #define DECR_PC_AFTER_BREAK 0 | |
30 | ||
31 | #include "m68k/tm-m68k.h" | |
cce74817 | 32 | #include "tm-vxworks.h" |
c906108c SS |
33 | |
34 | /* Takes the current frame-struct pointer and returns the chain-pointer | |
35 | to get to the calling frame. | |
36 | ||
37 | If our current frame pointer is zero, we're at the top; else read out | |
38 | the saved FP from memory pointed to by the current FP. */ | |
39 | ||
40 | #undef FRAME_CHAIN | |
41 | #define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0) | |
42 | ||
43 | /* If the chain pointer is zero (either because the saved value fetched | |
44 | by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN | |
45 | never fetched anything), we are at the top of the stack. */ | |
46 | /* We are guaranteed to have a zero frame pointer at bottom of stack, too. */ | |
47 | ||
48 | #undef FRAME_CHAIN_VALID | |
49 | #define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe) | |
50 | ||
51 | /* FIXME, Longjmp information stolen from Sun-3 config. Dunno if right. */ | |
52 | /* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least | |
53 | documented in a comment in <machine/setjmp.h>! */ | |
54 | ||
55 | #define JB_ELEMENT_SIZE 4 | |
56 | ||
57 | #define JB_ONSSTACK 0 | |
58 | #define JB_SIGMASK 1 | |
59 | #define JB_SP 2 | |
60 | #define JB_PC 3 | |
61 | #define JB_PSL 4 | |
62 | #define JB_D2 5 | |
63 | #define JB_D3 6 | |
64 | #define JB_D4 7 | |
65 | #define JB_D5 8 | |
66 | #define JB_D6 9 | |
67 | #define JB_D7 10 | |
68 | #define JB_A2 11 | |
69 | #define JB_A3 12 | |
70 | #define JB_A4 13 | |
71 | #define JB_A5 14 | |
72 | #define JB_A6 15 | |
73 | ||
74 | /* Figure out where the longjmp will land. Slurp the args out of the stack. | |
75 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
76 | we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. | |
77 | This routine returns true on success */ | |
78 | ||
79 | #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR) | |
a14ed312 | 80 | extern int get_longjmp_target (CORE_ADDR *); |
c906108c SS |
81 | |
82 | /* Number of registers in a ptrace_getregs call. */ | |
83 | ||
84 | #define VX_NUM_REGS (18) | |
85 | ||
86 | /* Number of registers in a ptrace_getfpregs call. */ | |
87 | ||
88 | #define VX_SIZE_FPREGS (8 * REGISTER_RAW_SIZE (FP0_REGNUM) \ | |
89 | + (3 * REGISTER_SIZE)) |