87 lines
1.6 KiB
C
87 lines
1.6 KiB
C
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#include <linux/kobject.h>
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#include <linux/string.h>
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#include <linux/sysfs.h>
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#include <linux/module.h>
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#include <linux/init.h>
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struct test_struct {
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int val;
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int arr[3];
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int *parr;
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char name[8];
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char *pname;
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};
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void test_func1(struct test_struct *p);
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void test_func2(struct test_struct p);
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void test_func1(struct test_struct *p)
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{
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printk("%s\n", p->name);
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printk("%s\n", p->pname);
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printk("%d\n", p->arr[1]);
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printk("%d\n", p->parr[1]);
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}
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void test_func2(struct test_struct p)
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{
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printk("%s\n", p.name);
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printk("%s\n", p.pname);
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printk("%d\n", p.arr[1]);
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printk("%d\n", p.parr[1]);
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}
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static ssize_t foo_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
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{
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struct test_struct a;
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a.val = 10;
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sprintf(a.name, "hwc");
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a.pname="njit";
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for (int i = 0; i < 3; i++)
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a.arr[i] = i;
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a.parr = a.arr;
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test_func1(&a);
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test_func2(a);
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return 0;
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}
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static struct kobj_attribute foo_attribute =
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__ATTR(foo, 0444, foo_show, NULL);
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static struct attribute *attrs[] = {
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&foo_attribute.attr,
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NULL,
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};
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static struct attribute_group attr_group = {
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.attrs = attrs,
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};
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static struct kobject *example_kobj;
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static int __init example_init(void)
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{
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int retval;
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example_kobj = kobject_create_and_add("kprobe_ftrace", kernel_kobj);
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if (!example_kobj)
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return -ENOMEM;
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retval = sysfs_create_group(example_kobj, &attr_group);
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if (retval)
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kobject_put(example_kobj);
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return retval;
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}
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static void __exit example_exit(void)
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{
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kobject_put(example_kobj);
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}
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module_init(example_init);
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module_exit(example_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Greg Kroah-Hartman <greg@kroah.com>");
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