Re: [PATCH v2 06/12] mm/execmem: introduce execmem_data_alloc()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 2023-06-16 at 11:50 +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
> 
> Data related to code allocations, such as module data section, need
> to
> comply with architecture constraints for its placement and its
> allocation right now was done using execmem_text_alloc().
> 
> Create a dedicated API for allocating data related to code
> allocations
> and allow architectures to define address ranges for data
> allocations.

Right now the cross-arch way to specify kernel memory permissions is
encoded in the function names of all the set_memory_foo()'s. You can't
just have unified prot names because some arch's have NX and some have
X bits, etc. CPA wouldn't know if it needs to set or unset a bit if you
pass in a PROT.

But then you end up with a new function for *each* combination (i.e.
set_memory_rox()). I wish CPA has flags like mmap() does, and I wonder
if it makes sense here instead of execmem_data_alloc().

Maybe that is an overhaul for another day though...




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Kernel Development]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Info]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Linux Media]     [Device Mapper]

  Powered by Linux