Masami Hiramatsu a017784f1b kprobes/ftrace: Recover original IP if pre_handler doesn't change it ... Recover original IP register if the pre_handler doesn't change it. Since current kprobes doesn't expect that another ftrace handler may change regs->ip, it sets kprobe.addr + MCOUNT_INSN_SIZE to regs->ip and returns to ftrace. This seems wrong behavior since kprobes can recover regs->ip and safely pass it to another handler. This adds code which recovers original regs->ip passed from ftrace right before returning to ftrace, so that another ftrace user can change regs->ip. Link: http://lkml.kernel.org/r/20141009130106.4698.26362.stgit@kbuild-f20.novalocal Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2014-11-20 11:42:48 -05:00
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common.h	kprobes/x86: Use text_poke_bp() instead of text_poke_smp*()	2013-07-19 09:57:04 +02:00
core.c	kprobes/x86: Don't try to resolve kprobe faults from userspace	2014-07-16 14:16:32 +02:00
ftrace.c	kprobes/ftrace: Recover original IP if pre_handler doesn't change it	2014-11-20 11:42:48 -05:00
Makefile	kprobes/x86: Move kprobes stuff under arch/x86/kernel/kprobes/	2013-01-21 13:22:37 -05:00
opt.c	kprobes/x86: Free 'optinsn' cache when range check fails	2014-08-27 20:24:32 +02:00