Fredrik Strupe d2f7eca60b ARM: 9071/1: uprobes: Don't hook on thumb instructions ... 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 <fredrik@strupe.net> Cc: stable@vger.kernel.org Fixes: c7edc9e326 ("ARM: add uprobes support") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>		2021-04-18 19:14:45 +01:00
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actions-arm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
core.c	ARM: 9071/1: uprobes: Don't hook on thumb instructions	2021-04-18 19:14:45 +01:00
core.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00