aboutsummaryrefslogtreecommitdiff
path: root/gdb/testsuite/gdb.base/signull.c
diff options
context:
space:
mode:
authorAndrew Cagney <cagney@redhat.com>2004-06-16 16:40:51 +0000
committerAndrew Cagney <cagney@redhat.com>2004-06-16 16:40:51 +0000
commit9d9030bc8f2fa4beddf67cd72a9d502155e40376 (patch)
tree22455534e9ca25b45a5d6c87cc23e9b2c523306f /gdb/testsuite/gdb.base/signull.c
parentacd4ad442c0b4668d9d203df51602c55db10805e (diff)
downloadgdb-9d9030bc8f2fa4beddf67cd72a9d502155e40376.zip
gdb-9d9030bc8f2fa4beddf67cd72a9d502155e40376.tar.gz
gdb-9d9030bc8f2fa4beddf67cd72a9d502155e40376.tar.bz2
2004-06-16 Andrew Cagney <cagney@gnu.org>
* gdb.base/signull.c: Update copyright. Include <string.h>. (bowler): Replace data_pointer with data_read and data_write cases. Add code_descriptor case. (zero, desc): New array and pointer. (data, code): Change to simple pointers. * gdb.base/signull.exp: Fix probe pattern matching a function descriptor SIGSEGV. Replace data_pointer with data_read and data_write tests.
Diffstat (limited to 'gdb/testsuite/gdb.base/signull.c')
-rw-r--r--gdb/testsuite/gdb.base/signull.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/gdb/testsuite/gdb.base/signull.c b/gdb/testsuite/gdb.base/signull.c
index dd77bbd..4139d14 100644
--- a/gdb/testsuite/gdb.base/signull.c
+++ b/gdb/testsuite/gdb.base/signull.c
@@ -1,6 +1,6 @@
/* This testcase is part of GDB, the GNU debugger.
- Copyright 1996, 1999, 2003 Free Software Foundation, Inc.
+ Copyright 1996, 1999, 2003, 2004 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -20,9 +20,10 @@
#include <signal.h>
#include <setjmp.h>
#include <stdlib.h>
+#include <string.h>
enum tests {
- code_entry_point, code_descriptor, data_pointer
+ code_entry_point, code_descriptor, data_read, data_write
};
static volatile enum tests test;
@@ -31,8 +32,12 @@ static volatile enum tests test;
typedef long data_t;
typedef long code_t (void);
-static volatile data_t *data[10];
-static volatile code_t *code[10];
+data_t *volatile data;
+code_t *volatile code;
+/* "desc" is intentionally initialized to a data object. This is
+ needed to test function descriptors on arches like ia64. */
+data_t zero[10];
+code_t *volatile desc = (code_t *) (void *) zero;
sigjmp_buf env;
@@ -47,12 +52,21 @@ bowler (void)
{
switch (test)
{
- case data_pointer:
- return *data[0];
+ case data_read:
+ /* Try to read address zero. */
+ return (*data);
+ case data_write:
+ /* Try to write (the assignment) to address zero. */
+ return (*data) = 1;
case code_entry_point:
- return code[0] ();
+ /* For typical architectures, call a function at address
+ zero. */
+ return (*code) ();
case code_descriptor:
- return ((code_t *) &code) ();
+ /* For atypical architectures that use function descriptors,
+ call a function descriptor, the code field of which is zero
+ (which has the effect of jumping to address zero). */
+ return (*desc) ();
}
}