uretprobes: Return probe entry, prepare_uretprobe()

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When a uprobe with return probe consumer is hit, prepare_uretprobe()
function is invoked. It creates return_instance, hijacks return address
and replaces it with the trampoline.

* Return instances are kept as stack per uprobed task.
* Return instance is chained, when the original return address is
  trampoline's page vaddr (e.g. recursive call of the probed function).

Signed-off-by: Anton Arapov <anton@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>

...

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Anton Arapov 2013-04-03 18:00:35 +02:00 • committed by Oleg Nesterov

parent f15706b79d

commit 0dfd0eb8e4

2 changed files with 92 additions and 1 deletions

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1

include/linux/uprobes.h

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92

kernel/events/uprobes.c

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