1 /* This testcase is part of GDB, the GNU debugger.
3 Copyright 1996, 1999, 2003, 2004, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
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 3 of the License, or
9 (at your option) any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 code_entry_point, code_descriptor, data_read, data_write
28 static volatile enum tests test;
30 /* Some basic types and zero buffers. */
33 typedef long code_t (void);
34 data_t *volatile data;
35 code_t *volatile code;
36 /* "desc" is intentionally initialized to a data object. This is
37 needed to test function descriptors on arches like ia64. */
39 code_t *volatile desc = (code_t *) (void *) zero;
55 /* Try to read address zero. */
58 /* Try to write (the assignment) to address zero. */
60 case code_entry_point:
61 /* For typical architectures, call a function at address
65 /* For atypical architectures that use function descriptors,
66 call a function descriptor, the code field of which is zero
67 (which has the effect of jumping to address zero). */
75 static volatile int i;
78 memset (&act, 0, sizeof act);
79 act.sa_handler = keeper;
80 sigaction (SIGSEGV, &act, NULL);
81 sigaction (SIGBUS, &act, NULL);
83 for (i = 0; i < 10; i++)