systemtap support arm?

[Torsten Polle]

Hi Jovi,

Jovi Zhang writes:
 > Hi,

 > This is my first contact systemtap@sourceware.org, I have a question
 > about uprobe support in systemtap of ARM architecture.

 > I got this from NEWS:

 > - arm now have a uprobes port which enables user probes. This still
 >   requires some kernel patches (user_regsets and tracehook support for arm).

 > But there don't have arm uprobe porting in Linux kernel mainline right
 > now(only x86), so where is this arm uprobes kernel part? Thanks.

 > .jovi

I've finished a first version of uprobes for ARM. It's more like a proof
of concept and shows that SystemTap works also for ARM. I tested the
patches on an i.MX 6 based board under 3.4. The patches basically differ
only in syscalls.h. The emulator code of kprobes and uprobes is nearly
identical. I wonder whether it's possible to merge both into one
implementation in the future.

You need patch 137e82c544b2e831be6908b1aa7385af1d85d830 to compile your
SystemTap script. 

I also needed the option -DSTAPCONF_ASM_SYSCALL_H to be added to the
invokation of stap. Has anybody an idea why the automatic detection
fails?

Kind Regards,
Torsten

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