uprobes/powerpc: Do not use arch_uprobe_*_step() helpers

2012-11-03T16:15:12Z

No functional changes. powerpc is the only user of arch_uprobe_enable/disable_step() helpers, but they should die. They can not be used correctly, every arch needs its own implementation (like x86 does). And they do not really help even as initial-and-almost-working code, arch_uprobe_*_xol() hooks can easily use user_enable/disable_single_step() directly. Change arch_uprobe_*_step() to do nothing, and convert powerpc to use ptrace helpers. This is equally wrong, powerpc needs the arch-specific fixes. Signed-off-by: Oleg Nesterov Acked-by: Ananth N Mavinakayanahalli Acked-by: Srikar Dronamraju

powerpc: Uprobes port to powerpc

2012-09-05T05:35:19Z

This is the port of uprobes to powerpc. Usage is similar to x86. [root@xxxx ~]# ./bin/perf probe -x /lib64/libc.so.6 malloc Added new event: probe_libc:malloc (on 0xb4860) You can now use it in all perf tools, such as: perf record -e probe_libc:malloc -aR sleep 1 [root@xxxx ~]# ./bin/perf record -e probe_libc:malloc -aR sleep 20 [ perf record: Woken up 22 times to write data ] [ perf record: Captured and wrote 5.843 MB perf.data (~255302 samples) ] [root@xxxx ~]# ./bin/perf report --stdio ... 69.05% tar libc-2.12.so [.] malloc 28.57% rm libc-2.12.so [.] malloc 1.32% avahi-daemon libc-2.12.so [.] malloc 0.58% bash libc-2.12.so [.] malloc 0.28% sshd libc-2.12.so [.] malloc 0.08% irqbalance libc-2.12.so [.] malloc 0.05% bzip2 libc-2.12.so [.] malloc 0.04% sleep libc-2.12.so [.] malloc 0.03% multipathd libc-2.12.so [.] malloc 0.01% sendmail libc-2.12.so [.] malloc 0.01% automount libc-2.12.so [.] malloc The trap_nr addition patch is a prereq. Signed-off-by: Ananth N Mavinakayanahalli Signed-off-by: Benjamin Herrenschmidt

kernel.git/arch/powerpc/kernel/uprobes.c, branch linux-3.8.y

uprobes/powerpc: Do not use arch_uprobe_*_step() helpers

powerpc: Uprobes port to powerpc