ARM: hw_breakpoint: don't advertise reserved breakpoints

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To permit handling of watchpoint exceptions without signalling a
debugger, it is necessary to reserve breakpoint registers for in-kernel
use only.

This patch ensures that we record and subtract the number of reserved
breakpoints from the number of usable breakpoint registers that we
advertise to userspace via the ptrace API.

Signed-off-by: Will Deacon <will.deacon@arm.com>

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Will Deacon 2010-11-28 15:09:36 +00:00

parent 7e20269647

commit 0017ff42ac

1 changed files with 117 additions and 89 deletions

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arch/arm/kernel/hw_breakpoint.c

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