ionut27001andClaude Opus 5.5 dfa96f1fe6 fix(libkernel): return ENOENT for thirteen sysctl names, as measured on a PS5 ...

In a payload process on a PS5 (firmware 12.70), sysctlbyname returns -1
with ENOENT for thirteen names that threw here, and leaves the buffer and
the length alone, for a read, a size query, a null length and a null
buffer with a null length. sysctl does the same for the fixed MIBs of
seven of them. sysctlnametomib gives those seven MIBs and returns ENOENT
for hw.cacheline_size and hw.usermem, which threw too.

machdep.cacheline_size already returned ENOENT and is now tested with
the others. A write to the new names and MIBs throws, as the console's
answer to a write was not tried. The hw.realmem and vm.overcommit debt
entries now say that a payload process gets ENOENT for them as well.

AI-assisted: yes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-20 13:46:29 +02:00

..

include

feat(libkernel): stop at start-up on a host CPU without the PS5's extensions

2026-10-14 20:29:57 +13:00

src

fix(libkernel): return ENOENT for thirteen sysctl names, as measured on a PS5

2026-10-20 13:46:29 +02:00