aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/kernel/kprobes-arm.c
Commit message (Collapse)AuthorAge
* ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and belowJon Medhurst (Tixy)2011-11-30
| | | | | | | | | | | | | | | | | 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 <leif.lindholm@arm.com> Tested-by: Leif Lindholm <leif.lindholm@arm.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: kprobes: Add exports for test codeJon Medhurst2011-09-20
| | | | | | | | 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 <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Remove now unused codeJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Decode ARM preload (immediate) instructionsJon Medhurst2011-07-13
| | | | | | | These were missing from the previous implementation. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Reject probing of unprivileged load and store instructionsJon Medhurst2011-07-13
| | | | | | | | These occur extremely rarely in the kernel and writing test cases for them is difficult. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Use new versions of emulate_ldr() and emulate_str()Jon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add new versions of emulate_ldr() and emulate_str()Jon Medhurst2011-07-13
| | | | | | | | | | 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 <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_rdlo12rdhi16rn0rm8_rwflags_nopc()Jon Medhurst2011-07-13
| | | | | | | | | 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 <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_rd12rm0_noflags_nopc()Jon Medhurst2011-07-13
| | | | | | | | | | | 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 <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Replace use of prep_emulate_rd12rn16rm0_wflags()Jon Medhurst2011-07-13
| | | | | | | These can now use emulate_rd12rn16rm0_rwflags_nopc(). Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_rd16rn12rm0rs8_rwflags_nopc()Jon Medhurst2011-07-13
| | | | | | | | | | | | This is the emulation function for the instruction format used by the ARM multiply-accumulate instructions. These don't allow use of PC so we don't have to add special cases for this. This function is used to replace use of prep_emulate_rd16rs8rm0_wflags and prep_emulate_rd16rn12rs8rm0_wflags. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate remaining instruction decoding functions to tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_100x to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_01xx to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_0111__1 to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_0110__1 to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_rd12rn16rm0_rwflags_nopc()Jon Medhurst2011-07-13
| | | | | | | | This is the emulation function for the instruction format used by the ARM media instructions. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_001x to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_cccc_000x to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM LDRD and STRD to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_ldrdstrd()Jon Medhurst2011-07-13
| | | | | | | This is an emulation function for the LDRD and STRD instructions. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM data-processing (register) instructions to ↵Jon Medhurst2011-07-13
| | | | | | | decoding tables Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add emulate_rd12rn16rm0rs8_rwflags()Jon Medhurst2011-07-13
| | | | | | | | This is the emulation function for the instruction format used by the ARM data-processing instructions. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add BLX macroJon Medhurst2011-07-13
| | | | | | | | | | This is for use by inline assembler which will be added to kprobes-arm.c It saves memory when used on newer ARM architectures and also provides correct interworking should ARM probes be required on Thumb kernels in the future. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Migrate ARM space_1111 to decoding tablesJon Medhurst2011-07-13
| | | | | Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add common decoding function for LDM and STMJon Medhurst2011-07-13
| | | | | | | | | | | | | | | | | The encoding of these instructions is substantially the same for both ARM and Thumb, so we can have common decoding and simulation functions. This patch moves the simulation functions from kprobes-arm.c to kprobes-common.c. It also adds a new simulation function (simulate_ldm1_pc) for the case where we load into PC because this may need to interwork. The instruction decoding is done by a custom function (kprobe_decode_ldmstm) rather than just relying on decoding table entries because we will later be adding optimisation code. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add hooks to override singlestep()Jon Medhurst2011-07-13
| | | | | | | | | | | | | | | | | | When a probe fires we must single-step the instruction which was replaced by a breakpoint. As the steps to do this vary between ARM and Thumb instructions we need a way to customise single-stepping. This is done by adding a new hook called insn_singlestep to arch_specific_insn which is initialised by the instruction decoding functions. These single-step hooks must update PC and call the instruction handler. For Thumb instructions an additional step of updating ITSTATE is needed. We do this after calling the handler because some handlers will need to test if they are running in an IT block. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Move find_str_pc_offset into kprobes-common.cJon Medhurst2011-07-13
| | | | | | | | Move str_pc_offset into kprobes-common.c as it will be needed by common code later. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Move is_writeback define to header file.Jon Medhurst2011-07-13
| | | | | | | This will be used later in other files. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Add kprobes-common.cJon Medhurst2011-07-13
| | | | | | | | | | | | This file will contain the instruction decoding and emulation code which is common to both ARM and Thumb instruction sets. For now, we will just move over condition_checks from kprobes-arm.c This table is also renamed to kprobe_condition_checks to avoid polluting the public namespace with a too generic name. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Split out internal parts of kprobes.hJon Medhurst2011-07-13
| | | | | | | | | | | | | | Later, we will be adding a considerable amount of internal implementation definitions to kprobe header files and it would be good to have these in local header file along side the source code, rather than pollute the existing header which is include by all users of kprobes. To this end, we add arch/arm/kernel/kprobes.h and move into this the existing internal defintions from arch/arm/include/asm/kprobes.h Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
* ARM: kprobes: Rename kprobes-decode.c to kprobes-arm.cJon Medhurst2011-07-13
This file contains decoding and emulation functions for the ARM instruction set. As we will later be adding a file for Thumb and a file with common decoding functions, this renaming makes things clearer. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 20:40:12 -0500