linux-toradex.git/arch/arm/kernel/kprobes-arm.c, branch v3.4.67

ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below

2011-11-30T23:54:54+00:00

The SWP instruction is deprecated on ARMv6 and with ARMv7 it will be
UNDEFINED when CONFIG_SWP_EMULATE is selected. In this case, probing a
SWP instruction will cause an oops when the kprobes emulation code
executes an undefined instruction.

As the SWP instruction should be rare or non-existent in kernels for
ARMv6 and later, we can simply avoid these problems by not allowing
probing of these.

Reported-by: Leif Lindholm 
Tested-by: Leif Lindholm 
Acked-by: Nicolas Pitre 
Signed-off-by: Jon Medhurst 
Signed-off-by: Russell King

ARM: kprobes: Add exports for test code

2011-09-20T18:17:43+00:00

The test code will be using kprobes' internal decoding tables so we
need to export these for when then the tests are compiled as a module.

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Remove now unused code

2011-07-13T17:32:51+00:00

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Decode ARM preload (immediate) instructions

2011-07-13T17:32:51+00:00

These were missing from the previous implementation.

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Reject probing of unprivileged load and store instructions

2011-07-13T17:32:51+00:00

These occur extremely rarely in the kernel and writing test cases for
them is difficult.

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Use new versions of emulate_ldr() and emulate_str()

2011-07-13T17:32:51+00:00

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Add new versions of emulate_ldr() and emulate_str()

2011-07-13T17:32:50+00:00

These use the register calling conventions required by the new decoding
table framework for calling simulated instructions.

We rename the old versions of these functions to *_old for now.

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Add emulate_rdlo12rdhi16rn0rm8_rwflags_nopc()

2011-07-13T17:32:50+00:00

This is the emulation function for the instruction format used by the
ARM multiply long instructions. It replaces use of
prep_emulate_rdhi16rdlo12rs8rm0_wflags().

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Add emulate_rd12rm0_noflags_nopc()

2011-07-13T17:32:50+00:00

This is the emulation function for the instruction format used by the
ARM bit-field manipulation instructions.

Various other instruction forms can also make use of this and it is used
to replace use of prep_emulate_rd12{rm0}{_modify}

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre

ARM: kprobes: Replace use of prep_emulate_rd12rn16rm0_wflags()

2011-07-13T17:32:50+00:00

These can now use emulate_rd12rn16rm0_rwflags_nopc().

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre