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Groups > comp.os.linux.embedded > #351
| From | "Mark" <mark_cruzNOTFORSPAM@hotmail.com> |
|---|---|
| Newsgroups | comp.unix.programmer, comp.os.linux.embedded |
| Subject | Re: memory protection in linux kernels |
| Date | 2012-10-18 11:57 -0400 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <k5p8t1$3fq$1@speranza.aioe.org> (permalink) |
| References | <k5n858$g72$1@speranza.aioe.org> <JRTfs.4$Ci6.1@fe03.iad> |
Cross-posted to 2 groups.
"Scott Lurndal" <scott@slp53.sl.home> wrote in message news:JRTfs.4$Ci6.1@fe03.iad... >>I'm debugging my kernel module, which appears to have a memory corruption, >>basically a piece of memory allocated by alloc_netdev() for 'net_device' >>instance has benn corrupted. I'm wondering if I could apply some >>"read-only" >>attribute on this memory, this way I expect to have Oops generated when >>someone tries to modify the memory. >> >>Does it sound reasonable or my ideas are undoable ? >>Thanks. >> >>Mark >> > > Turn on CONFIG_KDB and use kdb to set a watchpoint on the location being > corrupted. The processor will automatically stop and drop into kdb > when the location is modified. > > See the documentation for the bp command in kdb under the Documentation > directory in the kernel source tree. Thank you. The target is ARM-based and runs the kernel 2.6.31.8, which has only KGDB support, i.e. as I understand it allows to debug via rs232. What is the difference with KDB? Also, do I have to enable CONFIG_MAGIC_SYSRQ except CONFIG_KGDB and CONFIG_DEBUG_INFO (CONFIG_FRAME_POINTER is also recommended) ? Mark
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memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-17 17:32 -0400
Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-18 13:53 +0000
Re: memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-18 11:57 -0400
Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-18 16:24 +0000
Re: memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-19 18:08 -0400
Re: memory protection in linux kernels Ian Collins <ian-news@hotmail.com> - 2012-10-20 12:29 +1300
Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-20 19:49 +0000
Re: memory protection in linux kernels Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-10-18 17:56 +0100
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