Commit | Line | Data |
---|---|---|
8bfabb04 AC |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright 1996-2017 Free Software Foundation, Inc. |
8bfabb04 AC |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
8bfabb04 AC |
8 | (at your option) any later version. |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
a9762ec7 | 14 | |
8bfabb04 | 15 | You should have received a copy of the GNU General Public License |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8bfabb04 AC |
17 | |
18 | #include <signal.h> | |
19 | #include <setjmp.h> | |
725603e1 | 20 | #include <stdlib.h> |
9d9030bc | 21 | #include <string.h> |
8bfabb04 AC |
22 | |
23 | enum tests { | |
9d9030bc | 24 | code_entry_point, code_descriptor, data_read, data_write |
8bfabb04 AC |
25 | }; |
26 | ||
27 | static volatile enum tests test; | |
28 | ||
29 | /* Some basic types and zero buffers. */ | |
30 | ||
31 | typedef long data_t; | |
32 | typedef long code_t (void); | |
9d9030bc AC |
33 | data_t *volatile data; |
34 | code_t *volatile code; | |
35 | /* "desc" is intentionally initialized to a data object. This is | |
36 | needed to test function descriptors on arches like ia64. */ | |
37 | data_t zero[10]; | |
38 | code_t *volatile desc = (code_t *) (void *) zero; | |
8bfabb04 | 39 | |
8f5a3103 | 40 | sigjmp_buf env; |
8bfabb04 AC |
41 | |
42 | extern void | |
43 | keeper (int sig) | |
44 | { | |
725603e1 | 45 | siglongjmp (env, 0); |
8bfabb04 AC |
46 | } |
47 | ||
48 | extern long | |
49 | bowler (void) | |
50 | { | |
51 | switch (test) | |
52 | { | |
9d9030bc AC |
53 | case data_read: |
54 | /* Try to read address zero. */ | |
55 | return (*data); | |
56 | case data_write: | |
57 | /* Try to write (the assignment) to address zero. */ | |
58 | return (*data) = 1; | |
8bfabb04 | 59 | case code_entry_point: |
9d9030bc AC |
60 | /* For typical architectures, call a function at address |
61 | zero. */ | |
62 | return (*code) (); | |
8bfabb04 | 63 | case code_descriptor: |
9d9030bc AC |
64 | /* For atypical architectures that use function descriptors, |
65 | call a function descriptor, the code field of which is zero | |
66 | (which has the effect of jumping to address zero). */ | |
67 | return (*desc) (); | |
8bfabb04 AC |
68 | } |
69 | } | |
70 | ||
71 | int | |
72 | main () | |
73 | { | |
74 | static volatile int i; | |
725603e1 UW |
75 | |
76 | struct sigaction act; | |
77 | memset (&act, 0, sizeof act); | |
78 | act.sa_handler = keeper; | |
79 | sigaction (SIGSEGV, &act, NULL); | |
aacd552b | 80 | sigaction (SIGBUS, &act, NULL); |
725603e1 | 81 | |
8bfabb04 AC |
82 | for (i = 0; i < 10; i++) |
83 | { | |
725603e1 | 84 | sigsetjmp (env, 1); |
8bfabb04 AC |
85 | bowler (); |
86 | } | |
87 | } |