129 lines
2.5 KiB
C
129 lines
2.5 KiB
C
|
/*
|
||
|
|
* arch/blackfin/kernel/kgdb_test.c - Blackfin kgdb tests
|
||
|
|
*
|
||
|
|
* Copyright 2005-2008 Analog Devices Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the GPL-2 or later.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/proc_fs.h>
|
||
|
|
|
||
|
|
#include <asm/current.h>
|
||
|
|
#include <asm/uaccess.h>
|
||
|
|
#include <asm/system.h>
|
||
|
|
|
||
|
|
#include <asm/blackfin.h>
|
||
|
|
|
||
|
|
static char cmdline[256];
|
||
|
|
static unsigned long len;
|
||
|
|
|
||
|
|
#ifndef CONFIG_SMP
|
||
|
|
static int num1 __attribute__((l1_data));
|
||
|
|
|
||
|
|
void kgdb_l1_test(void) __attribute__((l1_text));
|
||
|
|
|
||
|
|
void kgdb_l1_test(void)
|
||
|
|
{
|
||
|
|
printk(KERN_ALERT "L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
|
||
|
|
printk(KERN_ALERT "L1 : code function addr = 0x%p\n", kgdb_l1_test);
|
||
|
|
num1 = num1 + 10 ;
|
||
|
|
printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
|
||
|
|
return ;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if L2_LENGTH
|
||
|
|
|
||
|
|
static int num2 __attribute__((l2));
|
||
|
|
void kgdb_l2_test(void) __attribute__((l2));
|
||
|
|
|
||
|
|
void kgdb_l2_test(void)
|
||
|
|
{
|
||
|
|
printk(KERN_ALERT "L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
|
||
|
|
printk(KERN_ALERT "L2 : code function addr = 0x%p\n", kgdb_l2_test);
|
||
|
|
num2 = num2 + 20 ;
|
||
|
|
printk(KERN_ALERT "L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
|
||
|
|
return ;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
int kgdb_test(char *name, int len, int count, int z)
|
||
|
|
{
|
||
|
|
printk(KERN_ALERT "kgdb name(%d): %s, %d, %d\n", len, name, count, z);
|
||
|
|
count = z;
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int test_proc_output(char *buf)
|
||
|
|
{
|
||
|
|
kgdb_test("hello world!", 12, 0x55, 0x10);
|
||
|
|
#ifndef CONFIG_SMP
|
||
|
|
kgdb_l1_test();
|
||
|
|
#endif
|
||
|
|
#if L2_LENGTH
|
||
|
|
kgdb_l2_test();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int test_read_proc(char *page, char **start, off_t off,
|
||
|
|
int count, int *eof, void *data)
|
||
|
|
{
|
||
|
|
int len;
|
||
|
|
|
||
|
|
len = test_proc_output(page);
|
||
|
|
if (len <= off+count)
|
||
|
|
*eof = 1;
|
||
|
|
*start = page + off;
|
||
|
|
len -= off;
|
||
|
|
if (len > count)
|
||
|
|
len = count;
|
||
|
|
if (len < 0)
|
||
|
|
len = 0;
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int test_write_proc(struct file *file, const char *buffer,
|
||
|
|
unsigned long count, void *data)
|
||
|
|
{
|
||
|
|
if (count >= 256)
|
||
|
|
len = 255;
|
||
|
|
else
|
||
|
|
len = count;
|
||
|
|
|
||
|
|
memcpy(cmdline, buffer, count);
|
||
|
|
cmdline[len] = 0;
|
||
|
|
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init kgdbtest_init(void)
|
||
|
|
{
|
||
|
|
struct proc_dir_entry *entry;
|
||
|
|
|
||
|
|
entry = create_proc_entry("kgdbtest", 0, NULL);
|
||
|
|
if (entry == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
entry->read_proc = test_read_proc;
|
||
|
|
entry->write_proc = test_write_proc;
|
||
|
|
entry->data = NULL;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit kgdbtest_exit(void)
|
||
|
|
{
|
||
|
|
remove_proc_entry("kgdbtest", NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(kgdbtest_init);
|
||
|
|
module_exit(kgdbtest_exit);
|
||
|
|
MODULE_LICENSE("GPL");
|