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5076de82 FF |
1 | /* Parameters for execution on a Sun, for GDB, the GNU debugger. |
2 | Copyright (C) 1986, 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 | ||
5076de82 FF |
20 | /* Let native-versus-cross support code know we are targeting sun3, |
21 | and modify registers to include sun3 fpustate register. */ | |
22 | ||
23 | #define GDB_TARGET_IS_SUN3 1 | |
24 | ||
2225eb85 | 25 | #include "m68k/tm-m68k.h" |
5076de82 FF |
26 | |
27 | /* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least | |
28 | documented in a comment in <machine/setjmp.h>! */ | |
29 | ||
30 | #define JB_ELEMENT_SIZE 4 | |
31 | ||
32 | #define JB_ONSSTACK 0 | |
33 | #define JB_SIGMASK 1 | |
34 | #define JB_SP 2 | |
35 | #define JB_PC 3 | |
36 | #define JB_PSL 4 | |
37 | #define JB_D2 5 | |
38 | #define JB_D3 6 | |
39 | #define JB_D4 7 | |
40 | #define JB_D5 8 | |
41 | #define JB_D6 9 | |
42 | #define JB_D7 10 | |
43 | #define JB_A2 11 | |
44 | #define JB_A3 12 | |
45 | #define JB_A4 13 | |
46 | #define JB_A5 14 | |
47 | #define JB_A6 15 | |
48 | ||
49 | /* Figure out where the longjmp will land. Slurp the args out of the stack. | |
50 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
51 | we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. | |
52 | This routine returns true on success */ | |
53 | ||
54 | #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR) | |
55 | ||
56 | #undef SAVED_PC_AFTER_CALL | |
57 | ||
58 | #ifdef __STDC__ | |
59 | struct frame_info; | |
60 | #endif | |
61 | ||
62 | extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *)); | |
63 | ||
64 | #define SAVED_PC_AFTER_CALL(frame) \ | |
65 | m68k_saved_pc_after_call(frame) | |
bc447a39 | 66 | |
eed6de01 PS |
67 | /* If sun3 pcc says that a parameter is a short, it's a short. */ |
68 | #define BELIEVE_PCC_PROMOTION_TYPE | |
69 | ||
bc447a39 JK |
70 | /* The code which tries to deal with this bug is never harmful on a sun3. */ |
71 | #define SUN_FIXED_LBRAC_BUG (0) | |
c67d08e8 PS |
72 | |
73 | /* On the sun3 the kernel pushes a sigcontext on the user stack and then | |
74 | `calls' _sigtramp in user code. _sigtramp saves the floating point status | |
75 | on the stack and calls the signal handler function. The stack does not | |
76 | contain enough information to allow a normal backtrace, but sigcontext | |
77 | contains the saved user pc/sp. FRAME_CHAIN and friends in tm-m68k.h and | |
78 | m68k_find_saved_regs deal with this situation by manufacturing a fake frame | |
79 | for _sigtramp. | |
80 | SIG_PC_FP_OFFSET is the offset from the signal handler frame to the | |
81 | saved pc in sigcontext. | |
82 | SIG_SP_FP_OFFSET is the offset from the signal handler frame to the end | |
83 | of sigcontext which is identical to the saved sp at SIG_PC_FP_OFFSET - 4. | |
84 | ||
85 | Please note that it is impossible to correctly backtrace from a breakpoint | |
86 | in _sigtramp as _sigtramp modifies the stack pointer a few times. */ | |
87 | ||
88 | #undef SIG_PC_FP_OFFSET | |
89 | #define SIG_PC_FP_OFFSET 324 | |
90 | #define SIG_SP_FP_OFFSET 332 |