Messages in this thread | | | Date | Mon, 7 Sep 2015 00:54:15 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH] ARM: fix alignement of __bug_table section entries |
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On Sun, Sep 06, 2015 at 11:31:34PM +0200, Robert Jarzmik wrote: > Russell King - ARM Linux <linux@arm.linux.org.uk> writes: > > >> [1] Approach 1 : translation table sync > >> ======================================= > ... > > The important place is in arch/arm/include/asm/domain.h, which is where > > we manipulate the DACR within probe_kernel_address(). > > Gah, silly me. But even with [1], I still get an error [2]. I have a > confirmation that I have a "Page Permission" fault on the > probe_kernel_address().
Hmm, that's not right. If it's the DACR, then it should be a page domain fault, not a page permission fault.
> [2] Oops > ======== > # insmod /tmp/unalign.ko > RJK1: fsr=23 far=e1c23643 dacr=51 > RJK2: fsr=23 far=e1c23643 dacr=51 > RJK3: fsr=2f far=bf00202c dacr=51 > RJK: fault=4 instr=0x00000000 instrptr=bf00202c
Can you add a show_pte(current->mm, instrptr) to dump those page table entries please?
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