powerpc/watchpoint: Fix ptrace code that muck around with address/len
ptrace_set_debugreg() does not consider new length while overwriting the watchpoint. Fix that. ppc_set_hwdebug() aligns watchpoint address to doubleword boundary but does not change the length. If address range is crossing doubleword boundary and length is less then 8, we will lose samples from second doubleword. So fix that as well. Signed-off-by:Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191017093204.7511-4-ravi.bangoria@linux.ibm.com
parent
b57aeab8
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