Linux/PROCESSOR-SDK-AM335X: Process stack question

Tim Potter

Tool/software: Linux

We are using TI SDK 7.0, Linux 3.12.10.

I have a little utility that monitors stack size of a process. It gets the tsk->mm->start_stack value and then gets the KSTK_ESP to get the current stack pointer. On occasion I see a situation where the KSTK_ESP returns a memory address higher than the start_stack value. To me this would indicate that the process popped too much off the stack and is reading outside the stack. But Linux does not seem to have an issue with this. Under which situations would this scenario happen?

over 8 years ago

0 Schuyler Patton over 8 years ago

TI__Mastermind 41510 points

Hi,

I am not sure we (TI) will be able to help with this question. This particular code is further up in the kernel beyond direct interaction with the TI drivers. Based on the question you don't seem to be seeing seg faults or kernel panics, is that the case?

One suggestion would be to send your question to this email list which handles kernel support on ARM processors :

linux-arm-kernel@lists.infradead.org

Best Regards,
Schuyler

0 Tim Potter over 8 years ago in reply to Schuyler Patton

Intellectual 726 points

Yeah, kind of figured that but it was a place to start. Thanks!

Processors

Processors forum

Linux/PROCESSOR-SDK-AM335X: Process stack question