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acpi crashes, maybe /dev/mem is buggy?

From: Andrea Monaco
Subject: acpi crashes, maybe /dev/mem is buggy?
Date: Fri, 26 Nov 2021 22:52:53 +0100


as I said some time ago, my acpi server always crashes when I start it,
while parsing ACPI tables.

I found out that the XSDT table, the second one that is inspected, is
supposedly at physical address 0x9cfd1188, which is quite high.  When I
inspect that address on GNU/Linux in /dev/mem, I see the string "XSDT"
as expected; on Hurd I see zeros and then garbage.

Maybe gnumach writes at that address at some point?  Or it's an issue
with the /dev/mem driver?  I can't locate it inside gnumach.


Andrea Monaco

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