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