arm: pad minidump page tableHEADmain

libkvm locates the sparse page array after the page-rounded PTE table
size, but the ARM minidump writer emitted only the unrounded size.  When
the table size was not page-aligned, libkvm therefore read every dumped
physical page at the wrong offset.

The mismatch was introduced when libkvm began rounding ptesize.  It has
affected ARM minidumps since ffdeef323449 ("libkvm: Improve physical
address lookup scaling."). It is exposed when the dumped KVA span is not
a multiple of 4 MiB.

Zero-pad the final PTE page and include the padding in the dump size.

Reviewed by:	jhb
Approved by:	jhb (mentor)
Fixes:		ffdeef323449 ("libkvm: Improve physical address lookup scaling.")
MFC after:	2 weeks
Sponsored by:	FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D59716

0 files changed, 0 insertions, 0 deletions