ARM: 7987/1: ARM : unwinder : Prevent data abort due to stack overflow

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While unwinding backtrace, stack overflow is possible. This stack
overflow can sometimes lead to data abort in system if the area after
stack is not mapped to physical memory.

To prevent this problem from happening, execute the instructions that
can cause a data abort in separate helper functions, where a check for
feasibility is made before reading each word from the stack.

Signed-off-by: Anurag Aggarwal <a.anurag@samsung.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Anurag Aggarwal 2014-02-24 11:17:36 +01:00 • committed by Russell King

parent 8258a9895c

commit a51345770e

1 changed files with 100 additions and 37 deletions

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arch/arm/kernel/unwind.c

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