lkml.org 
[lkml]   [2020]   [Jan]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: Question about output of kmalloc()
Date
From:  xuesong Chen
> Sent: 14 January 2020 07:21
> Below code snippet in the .ko:
>
> unsigned long *p = (unsigned long *)kmalloc(sizeof(*p), GFP_KERNEL);
> printk("Addr of p = 0x%p\n", p);
>
> The output is:
> Addr of p = 0x0000000018606ce7
>
> In my mind, during the early day, the p should be 0xfffff...., can
> anybody give some tips why the output looks like it's a physical
> address?

The printed value is hashed to avoid leaking info.

David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
\
 
 \ /
  Last update: 2020-01-14 11:38    [W:0.037 / U:6.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site