Revision - c86a32c - kprobes/x86: Disable optimizing on the function jumps to [...] - origin: https://github.com/torvalds/linux

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05 April 2024, 19:05:47 UTC

Revision c86a32c09f8ced67971a2310e3b0dda4d1749007 authored by Masami Hiramatsu on 18 January 2018, 16:15:20 UTC, committed by Thomas Gleixner on 19 January 2018, 15:31:29 UTC

kprobes/x86: Disable optimizing on the function jumps to indirect thunk

Since indirect jump instructions will be replaced by jump
to __x86_indirect_thunk_*, those jmp instruction must be
treated as an indirect jump. Since optprobe prohibits to
optimize probes in the function which uses an indirect jump,
it also needs to find out the function which jump to
__x86_indirect_thunk_* and disable optimization.

Add a check that the jump target address is between the
__indirect_thunk_start/end when optimizing kprobe.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/151629212062.10241.6991266100233002273.stgit@devbox

1 parent c1804a2

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Tip revision: c86a32c09f8ced67971a2310e3b0dda4d1749007 authored by Masami Hiramatsu on 18 January 2018, 16:15:20 UTC
kprobes/x86: Disable optimizing on the function jumps to indirect thunk

Tip revision: c86a32c

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.cocciconfig	-rw-r--r--	59 bytes
.get_maintainer.ignore	-rw-r--r--	31 bytes
.gitattributes	-rw-r--r--	30 bytes
.gitignore	-rw-r--r--	1.3 KB
.mailmap	-rw-r--r--	8.7 KB
COPYING	-rw-r--r--	18.3 KB
CREDITS	-rw-r--r--	96.2 KB
Kbuild	-rw-r--r--	2.2 KB
Kconfig	-rw-r--r--	287 bytes
MAINTAINERS	-rw-r--r--	420.4 KB
Makefile	-rw-r--r--	58.4 KB
README	-rw-r--r--	722 bytes

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kprobes/x86: Disable optimizing on the function jumps to indirect thunk

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