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[PATCH] - gnumach: Implement offset in device map

From: Joan Lledó
Subject: [PATCH] - gnumach: Implement offset in device map
Date: Sun, 22 Aug 2021 12:51:09 +0200


I made the changed in the device mapper to implement the offset, also updated 
my branches of hurd and libpciaccess accordingly.

It wasn't as trivial as it seemed, there were some /* HACK */ lines which in 
fact limited the number of pagers per device to 1, so once the system got a 
pager for "mem" at offset 0, I couldn't give it another offset without that 
affecting all other memory mappings for that device. I updated the structure of 
the hash table to get rid of the /* HACK */ lines and support many pagers per 
device, one pager per [device,offset]. (BTW, why is the the hash table limited 
to 127 slots?)

On the other hand, I couldn't think of any other way to get rid of the struct 
pci_user_data to get the pager from the arbiter. Any ideas? I'll work on the 
new libpciaccess interface for the Hurd to get the pager unless somebody has a 
better idea.

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