- 14 7月, 2011 40 次提交
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由 Jon Medhurst 提交于
These were missing from the previous implementation. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
These occur extremely rarely in the kernel and writing test cases for them is difficult. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
These can now use emulate_rd12rn16rm0_rwflags_nopc(). Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This is the emulation function for the instruction format used by the ARM media instructions. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This is an emulation function for the LDRD and STRD instructions. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This is the emulation function for the instruction format used by the ARM data-processing instructions. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This writes a new value to PC which was obtained as the result of an ARM ALU instruction. For ARMv7 and later this performs interworking. On ARM kernels we shouldn't encounter any ALU instructions trying to switch to Thumb mode so support for this isn't strictly necessary. However, the approach taken in all other instruction decoding is for us to avoid unpredictable modification of the PC for security reasons. This is usually achieved by rejecting insertion of probes on problematic instruction, but for ALU instructions we can't do this as it depends on the contents of the CPU registers at the time the probe is hit. So, as we require some form of run-time checking to trap undesirable PC modification, we may as well simulate the instructions correctly, i.e. in the way they would behave in the absence of a probe. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
We will reject probing of unprivileged load and store instructions. These rarely occur and writing test cases for them is difficult. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
We'll treat the preload instructions as nops as they are just performance hints. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
The kernel doesn't currently support VFP or Neon code, and probing of code with CP15 operations is fraught with bad consequences. So we will just reject probing these instructions. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
We reject probing of load/store exclusive instructions because any emulation routine could never succeed in gaining exclusive access as the exception framework clears the exclusivity monitor when a probes breakpoint is hit. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This patch improves the performance of LDM and STM instruction emulation. This is desirable because. - jprobes and kretprobes probe the first instruction in a function and, when the frame pointer is omitted, this instruction is often a STM used to push registers onto the stack. - The STM and LDM instructions are common in the body and tail of functions. - At the same time as being a common instruction form, they also have one of the slowest and most complicated simulation routines. The approach taken to optimisation is to use emulation rather than simulation, that is, a modified form of the instruction is run with an appropriate register context. Benchmarking on an OMAP3530 shows the optimised emulation is between 2 and 3 times faster than the simulation routines. On a Kirkwood based device the relative performance was very significantly better than this. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
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: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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由 Jon Medhurst 提交于
This writes a value to PC which was obtained as the result of a LDR or LDM instruction. For ARMv5T and later this must perform interworking. Signed-off-by: NJon Medhurst <tixy@yxit.co.uk> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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