linux-toradex.git/arch/arm/probes/uprobes, branch master

arm/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()

2026-01-06T15:34:27+00:00

Replace deprecated kmap_atomic() with kmap_local_page().

Signed-off-by: Keke Ming 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Oleg Nesterov 
Link: https://patch.msgid.link/20260103084243.195125-5-ming.jvle@gmail.com

uprobes: Add is_register argument to uprobe_write and uprobe_write_opcode

2025-08-21T18:09:19+00:00

The uprobe_write has special path to restore the original page when we
write original instruction back. This happens when uprobe_write detects
that we want to write anything else but breakpoint instruction.

Moving the detection away and passing it to uprobe_write as argument,
so it's possible to write different instructions (other than just
breakpoint and rest).

Signed-off-by: Jiri Olsa 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Masami Hiramatsu (Google) 
Acked-by: Andrii Nakryiko 
Acked-by: Oleg Nesterov 
Link: https://lore.kernel.org/r/20250720112133.244369-7-jolsa@kernel.org

kernel/events/uprobes: pass VMA to set_swbp(), set_orig_insn() and uprobe_write_opcode()

2025-05-12T00:48:18+00:00

We already have the VMA, no need to look it up using
get_user_page_vma_remote().  We can now switch to get_user_pages_remote().

Link: https://lkml.kernel.org/r/20250321113713.204682-3-david@redhat.com
Signed-off-by: David Hildenbrand 
Acked-by: Oleg Nesterov 
Acked-by: Peter Zijlstra (Intel) 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Andrii Nakryiko 
Cc: Arnaldo Carvalho de Melo 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: "Masami Hiramatsu (Google)" 
Cc: Matthew Wilcox (Oracle) 
Cc: Namhyung kim 
Cc: Russel King 
Cc: tongtiangen 
Signed-off-by: Andrew Morton

ARM: 9071/1: uprobes: Don't hook on thumb instructions

2021-04-18T18:14:45+00:00

Since uprobes is not supported for thumb, check that the thumb bit is
not set when matching the uprobes instruction hooks.

The Arm UDF instructions used for uprobes triggering
(UPROBE_SWBP_ARM_INSN and UPROBE_SS_ARM_INSN) coincidentally share the
same encoding as a pair of unallocated 32-bit thumb instructions (not
UDF) when the condition code is 0b1111 (0xf). This in effect makes it
possible to trigger the uprobes functionality from thumb, and at that
using two unallocated instructions which are not permanently undefined.

Signed-off-by: Fredrik Strupe 
Cc: stable@vger.kernel.org
Fixes: c7edc9e326d5 ("ARM: add uprobes support")
Signed-off-by: Russell King

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

Uprobe: Additional argument arch_uprobe to uprobe_write_opcode()

2018-08-14T00:08:33+00:00

Add addition argument 'arch_uprobe' to uprobe_write_opcode().
We need this in later set of patches.

Link: http://lkml.kernel.org/r/20180809041856.1547-3-ravi.bangoria@linux.ibm.com

Reviewed-by: Song Liu 
Acked-by: Srikar Dronamraju 
Signed-off-by: Ravi Bangoria 
Signed-off-by: Steven Rostedt (VMware)

ARM: kprobes: introduces checker

2015-01-09T09:36:51+00:00

This patch introdces 'checker' to decoding phase, and calls checkers
when instruction decoding. This allows further decoding for specific
instructions.  This patch introduces a stub call of checkers in kprobe
arch_prepare_kprobe() as an example and for further expansion.

Signed-off-by: Wang Nan 
Reviewed-by: Jon Medhurst 
Reviewed-by: Masami Hiramatsu 
Signed-off-by: Jon Medhurst

ARM: probes: Use correct action types for MOVW, SEV and WFI

2015-01-09T09:36:51+00:00

This doesn't correct any bugs when probing these instructions but makes
MOVW slightly faster and makes everything more symmetric with the Thumb
instruction cases.

We can also remove the now redundant PROBES_EMULATE_NONE and
PROBES_SIMULATE_NOP actions.

Signed-off-by: Jon Medhurst

ARM: probes: move all probe code to dedicate directory

2015-01-09T09:36:50+00:00

In discussion on LKML (https://lkml.org/lkml/2014/11/28/158), Russell
King suggests to move all probe related code to arch/arm/probes. This
patch does the work. Due to dependency on 'arch/arm/kernel/patch.h', this
patch also moves patch.h to 'arch/arm/include/asm/patch.h', and related
'#include' directives are also midified to '#include '.

Following is an overview of this patch:

 ./arch/arm/kernel/               ./arch/arm/probes/
 |-- Makefile                     |-- Makefile
 |-- probes-arm.c          ==>    |-- decode-arm.c
 |-- probes-arm.h          ==>    |-- decode-arm.h
 |-- probes-thumb.c        ==>    |-- decode-thumb.c
 |-- probes-thumb.h        ==>    |-- decode-thumb.h
 |-- probes.c              ==>    |-- decode.c
 |-- probes.h              ==>    |-- decode.h
 |                                |-- kprobes
 |                                |   |-- Makefile
 |-- kprobes-arm.c         ==>    |   |-- actions-arm.c
 |-- kprobes-common.c      ==>    |   |-- actions-common.c
 |-- kprobes-thumb.c       ==>    |   |-- actions-thumb.c
 |-- kprobes.c             ==>    |   |-- core.c
 |-- kprobes.h             ==>    |   |-- core.h
 |-- kprobes-test-arm.c    ==>    |   |-- test-arm.c
 |-- kprobes-test.c        ==>    |   |-- test-core.c
 |-- kprobes-test.h        ==>    |   |-- test-core.h
 |-- kprobes-test-thumb.c  ==>    |   `-- test-thumb.c
 |                                `-- uprobes
 |                                    |-- Makefile
 |-- uprobes-arm.c         ==>        |-- actions-arm.c
 |-- uprobes.c             ==>        |-- core.c
 |-- uprobes.h             ==>        `-- core.h
 |
 `-- patch.h               ==>    arch/arm/include/asm/patch.h

Signed-off-by: Wang Nan 
Acked-by: Masami Hiramatsu 
Signed-off-by: Jon Medhurst