Bananymous/banan-os
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Author SHA1 Message Date
Bananymous
d2e21f9380 Kernel: Fix 64 bit page table range reservation from lower->higher half 2026-05-06 17:30:43 +03:00
Bananymous
443be800b7 Kernel: Fix remote TLB shootdown for <= 32 pages 
I was modifying the `vaddr` argument while invalidating which lead to
the smp message containing wrong virtual address. This showed up in
really weird bugs from invalid TLB
 2026-05-06 17:30:43 +03:00
Bananymous
3ac955714b Kernel: Optimize FileBackedRegion CoW 
Just copy data from the existing page instead of locking inode's shared
data, copying to temporary buffer and finally copying to destination
 2026-05-06 17:30:43 +03:00
Bananymous
62f5292f38 Kernel: Send only one TLB invalidation when creating a ByteRingBuffer 2026-05-06 17:30:43 +03:00
Bananymous
7553ede3b4 Kernel: Send only one TLB invalidation when creating a VirtualRange 2026-05-06 00:27:26 +03:00
Bananymous
eba97c1fc7 Kernel: Avoid possible dead lock while sending smp messages 
Process own events while waiting for space on another processor. This
fixes a dead lock when processors are sending messages to each other
 2026-05-06 00:09:05 +03:00
Bananymous
47650980f2 LibC: Reorder stack trace dump printing 
If we fault while getting start of stack frame at least we now print
that we were trying to get the stack trace :^)
 2026-05-05 13:54:51 +03:00
Bananymous
4b12770485 LibC: Don't leak FILEs on failed shebang exec 2026-05-05 13:52:52 +03:00
Bananymous
ba106f6bf5 LibC: Update argv[0] for shebang scripts to full path 
This is needed so `dirname -- "$0"` works with shebang scripts found in
PATH
 2026-05-05 12:48:04 +03:00
Bananymous
3a05a29294 dirname: Support options and multiple strings 
This is not needed by POSIX but sdl2-config uses `dirname -- "$0"`
 2026-05-05 01:42:28 +03:00
Bananymous
efeaafaff6 Kernel: Cleanup E1000 link speed code 2026-05-04 21:23:04 +03:00
Bananymous
6966475dcf Kernel: Make E1000 sending lockless and mostly non-blocking 
Now we only block if all 256 tx descriptors are waiting to be sent. This
removes TCP acks from taking 30% of profiles while DOWNLOADING files
 2026-05-04 21:15:15 +03:00
Bananymous
dfe24b69e0 Kernel: Don't keep devfs locked while performing disk sync 2026-05-04 20:26:02 +03:00
Bananymous
93e1091252 Kernel: Rewrite kmalloc 
Kmalloc is now a bitmap allocator with dynamic resizing and we dont need
to allocate 64 MiB static block of memory reserved for kmalloc :^)
 2026-05-04 20:26:02 +03:00
Bananymous
f293377e31 Kernel: Dynamically allocate PCI devices 
There was no need to prealloce almost a 5 MiB buffer for PCI all
possible pci devies :D
 2026-05-04 20:26:02 +03:00
Bananymous
f4e2e62d04 Kernel: Remove kmalloc API for identity mapped results 
This is no longer used. This finally allows me to rewrite kmalloc :^)
 2026-05-04 20:26:02 +03:00
Bananymous
d42b363fb1 Kernel: Remove kmalloc identity map requirement from USB keyboard 
This is the last place requiring kmalloc identity mapping
 2026-05-04 20:26:02 +03:00
Bananymous
8773e80917 Kernel: Remove kmalloc identity map requirement from XHCI device init 2026-05-04 20:26:02 +03:00
Bananymous
0c6d713c4a Kernel: Rewrite 32 bit paging to not depend on kmalloc 
There are a lot of 'unnecessary' fast page mappings but at least this
works.
 2026-05-04 20:26:02 +03:00
Bananymous
8091127150 Kernel: Add page table api to map multiple fast pages 
This is not currently used, but can be handy in the future
 2026-05-04 20:26:02 +03:00
DcraftBg
b8dc199738 Kernel: Fix ByteRingBuffer->back() 2026-05-04 20:26:02 +03:00
Bananymous
74127c0f45 Kernel: Cleanup inline assembly accessing cpu specific data 2026-05-04 20:26:02 +03:00
Bananymous
28499b890c LibC: Mark exit as noreturn 2026-05-04 20:26:02 +03:00
Bananymous
2f45349658 Kernel: Calculate internet checksum in host endian 
No need to swap bytes of every 16 bit word in the packet, we can just do
one swap at the return
 2026-05-04 20:26:02 +03:00
Bananymous
fde085e04b Kernel: Pass current cpu index as a GDT limit 
I had no idea LSL was an instruction. This cleans up code to get the
current cpu by a lot and does not require extra segment usage :D
 2026-05-04 20:26:02 +03:00
Bananymous
77ca525552 BAN: Fix HashSet 2026-05-04 20:26:02 +03:00
Bananymous
3b83daef17 Kernel: Use empty string instead of nullptr for non existing proc name 2026-05-04 20:26:01 +03:00
Bananymous
f37d9dbdb1 Kernel: Remove kmalloc_vaddr_of 
This is no longer needed. It was only used for x86_64 paging and AP
stack initialization
 2026-05-04 20:26:01 +03:00
Bananymous
b7cedad891 Kernel: Wrap syscall macro value in paranthesis 2026-05-04 20:26:01 +03:00
Bananymous
cdf0de34fb Kernel: Stop stacktrace dump on null bp 
This makes stack traces not crash before IDT is initialized
 2026-05-04 20:26:01 +03:00
Bananymous
03fccdffe1 Kernel: Rewrite paging and AP initialization 
Initial step of paging now just prepares fast page for heap, actual page
table initialization happens after heap is initialized which allows
x86_64 to never depend on kmalloc for pages.

Processor's stacks are now also spawned with PMM/VMM allocated stacks
instead of kmalloc identity mapped.
 2026-05-04 20:26:01 +03:00
Bananymous
1602b195c5 ports: Rework ssl certificates 
ca-certificates:
 - update to 2026.03.19
 - install to /etc/cacert
 - extract individual ceritificates from the bundle

openssl:
 - depend on ca-certificates
 - install hashed symlinks to individual certs

curl:
 - don't depend on ca-certificates; openssl handles this
 - set both ca-bundle and ca-path
 2026-04-28 02:23:46 +03:00
Bananymous
1486ad7aa5 Kernel: Don't map NIC buffers as uncached 
There is no need for them to be uncached. Having them as uncached killed
the networking performance, over 90% time was spent in kernel out of
which 80% was in checksum calculation and memcpy, half each (measured in
qemu with e1000e)
 2026-04-27 19:45:16 +03:00
Bananymous
ab8bcbec3e Kernel: Allow mapping dma regions as not uncached 2026-04-27 19:36:32 +03:00
Bananymous
0e00b72df6 BAN: Cleanup HashMap 
Add a concept for HashMapFindable instead of manually specifying the
requries expression everywhere.

Allow HashMapFindable also for `remove`, `contains`, `operator[]`, `at`

Make Entry have a const Key. This allows iterator's operator* and
operator-> return values have const keys.
 2026-04-25 22:10:01 +03:00
Bananymous
a63818ec33 BAN: Cleanup HashSet 
Add a concept for HashSetFindable instead of manually specifying the
requries expression everywhere.

Allow HashSetFindable also for `remove` and `contains`.

Remove non-const return values from iterator; you should never modify
the hashed value in place.

Don't require key to be move assignable, move construction is enough.
 2026-04-25 22:10:01 +03:00
Bananymous
cf2e8ffaff Kernel: Remove unnecessary custom RefPtr hashes 
RefPtr now exposes its own default hash
 2026-04-25 22:10:01 +03:00
Bananymous
b5647ff258 BAN: Rewrite RefPtr,UniqPtr const semantics 
const RefPtr<T> now allows accessing T as non-const. Also add default
hash function for RefPtr and UniqPtr based on the pointer value
 2026-04-25 22:10:01 +03:00
Bananymous
bef53c726b Userspace: Install libdl, libm, libpthread as symlinks to libc 
Having dummy libraries was just unnecessary
 2026-04-21 21:46:00 +03:00
Bananymous
6b43cadf3a Kernel: Implement stack trace dump with safe memcpy 
This fixes kernel panic if the stack trace cannot be read. Manually
validating pointers is definitely not safe
 2026-04-21 21:20:52 +03:00
Bananymous
b74812d669 Kernel: Remove unnused features from VirtualRange 
On-demand paging has not been used ever since I made userspace stack be
a normal MemoryRegion.
 2026-04-21 19:58:09 +03:00
Bananymous
eea0154f18 LibC: Cleanup RNG and properly initialize to srand(1) at startup 2026-04-21 00:26:41 +03:00
Bananymous
ea4c34fc0b LibC: Fix printf thread safety 
I don't know why I was using a static buffer for value conversions :D
 2026-04-21 00:25:56 +03:00
Bananymous
558ed8fd44 LibC: Define pthread_{equal,self} as macros 
These really should get inlined :D
 2026-04-21 00:25:16 +03:00
Bananymous
8665195350 Kernel: Allow main thread to call pthread_exit 
Apparently this is allowed. Also when last thread calls pthread_join
the process should also exit
 2026-04-21 00:23:35 +03:00
Bananymous
72a24a0d38 Kernel: Reorder FUTEX_WAIT value and timeout check 
Return EAGAIN rather than ETIMEDOUT if value does not match at futex
entry
 2026-04-21 00:20:37 +03:00
Bananymous
0ee50032f3 Kernel: Fix 32 bit signal trapoline offset 2026-04-21 00:19:33 +03:00
Bananymous
40f3546aca BAN: Rewrite HashMap as a wrapper around HashSet 
There is really no need to have two implementation of the same thing.
Only difference now is that HashMap's value type has to be movable but
this wasn't an issue
 2026-04-21 00:18:18 +03:00
Bananymous
a8e496310b Kernel: Use HashMap for fd->epoll_event mapping 
I don't know why it was a static array :D
 2026-04-21 00:14:24 +03:00
Bananymous
fe613e4274 BAN: Rewrite HashSet 
Instead of representing the map as vector or linked lists which required
an allocation for every insertion and deallocation for removal, we now
store a single big contiguous block of memory and use hash chains to
handle collisions. This intuitively feels much better although I did not
run any benchmarks.
 2026-04-21 00:14:24 +03:00