uprobe: single step over uprobe & global breakpoints

[Sebastian Andrzej Siewior]

We have three pieces here:

[PATCH 1/5] uprobes: Use a helper instead of ptrace's single step
[PATCH 2/5] x86/uprobes: implement x86 specific arch_uprobe_*_step

following Oleg's suggestion to allow single stepping over an uprobe.

[PATCH 3/5] uprobes: remove check for uprobe variable in
[PATCH 4/5] uprobes: probe definiton can only start with 'p' and '-'

category cleanup.

[RFC 5/5] uprobes: add global breakpoints

global breakpoints. There is no gdb interface available in terms of "how do I
know that that a program hit a global breakpoint" and not doing ps or
"cat trace" all the time.

Sebastian
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