Re: kdgb source query

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tuesday 30 Mar 2004 2:51 pm, mohanlal jangir wrote:
> While looking in kgdb patch source, I found frequent use of registers db0,
> db1... and dr6, dr7 etc in inline assembly code. Which are these registers?
> I know registers eax, ebx etc but never heard of these. Are these same
> registers? If  yes, then what is mapping?
>
> Regards
> Mohanlal

These are debug registers in x86 architecture. They are used hardware 
debugging. This includes support for watchpoints. You can specify a data 
address for a watchpoint. The watchpoint will be triggered like a breakpoint 
whenever the data is modified. THis is useful if you want to know where a 
particular integer is modified in a huge program, for example.

-- 
Amit Kale
EmSysSoft (http://www.emsyssoft.com)
KGDB: Linux Kernel Source Level Debugger (http://kgdb.sourceforge.net)


--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive:       http://mail.nl.linux.org/kernelnewbies/
FAQ:           http://kernelnewbies.org/faq/


[Index of Archives]     [Newbies FAQ]     [Linux Kernel Mentors]     [Linux Kernel Development]     [IETF Annouce]     [Git]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux SCSI]     [Linux ACPI]
  Powered by Linux