 t3hn3rd
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de6fde05cc
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feature: preemptive process management - implementation progress
Implement a preemptive multitasking system for the Asuro kernel.
Context Switching & Scheduling:
- Custom IRQ0 ISR (contextswitcher.pas) with PUSHAD/POPAD ESP-swap
- Round-robin scheduler with priority-based quantum
- Process table using DList of PProcessContext pointers
- Idle process (PID 0) replaces kernel HLT loop
Process Lifecycle:
- create/kill/terminate/sendMessage API (processmanager.pas)
- Process states: Created, Running, Ready, Suspended, Awaiting,
Finished, Error
- Parent-child tracking (ParentID, smChildExited notification on reap)
- proc_yield, proc_sleep_ms, proc_await, proc_suspend, proc_exit
Resource Binding & Cleanup:
- Per-process resource list
(bindResource/unbindResource/unbindAllResources)
- TCP sockets auto-bound to owning process (OwnerPID on TTCPSocket)
- socket_cleanup + auto-unbind in DestroySocket
VTerminal Refactor:
- Multi-instance design (heap-allocated TVTermState per terminal)
- Foreground process with incremental stdout/stderr drain via LVGL timer
- Ctrl+C kills foreground process (killForeground)
- Per-terminal CWD, dir stack, FS builtins (CD/LS/PUSHD/POPD)
- Background job support (& suffix, JOBS/FG commands)
- Command history (Up/Down arrow)
Command Consolidation:
- 14 commands extracted from 9 units into centralized progmanager.pas
- Command procedures exported in host unit interfaces
- E1000/TRACER/stdio builtins kept in-place (conditional/circular)
New Units:
- src/include/proctypes.pas — process type definitions
- src/processmanager.pas — core process manager
- src/prog/ping.pas — standalone ICMP ping process
- src/prog/testcmd.pas — test command (proc_sleep_ms demo)
- src/testprocs.pas — process subsystem smoke tests
Misc:
- ICMP callbacks gain userData parameter for concurrency-safe ping
- CLI/STI guards on kalloc/kfree (lmemorymanager.pas)
- LV_KEY_CTRLC constant + Ctrl+C interception in LVGL keyboard hook
- Window owner PID tracking (windows.pas)
- ISR_32 gate override support (isrmanager.pas)
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2026-03-04 19:42:33 +00:00 |
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t3hn3rd
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fb675a2299
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feature: implement TCP (RFC 793) protocol driver
Add full TCP/IP stack implementation at L4 alongside UDP and ICMP.
Core Protocol Engine:
- TCP types in nettypes.pas (header, TCB, state enum, error codes,
callbacks, OOO entry, socket structures)
- 3-way handshake (active & passive OPEN)
- Reliable data transfer with ACK and sequence number tracking
- Graceful close (FIN_WAIT, CLOSE_WAIT, LAST_ACK, TIME_WAIT)
- RST send/receive handling
- Retransmission with exponential backoff (max 5 attempts)
- Pseudo-header based checksum (RFC 793)
Server Support:
- LISTEN → SYN_RECEIVED → ESTABLISHED passive open path
- Listen backlog enforcement (configurable per-socket)
- accept() to retrieve established child connections
Robustness & Hardening:
- Delayed ACK timer (~200ms)
- Nagle's algorithm (buffer small sends while unACKed data pending)
- Jacobson/Karels RTT estimation with adaptive RTO
- Congestion control (slow start / congestion avoidance)
- Zero-window probing with exponential backoff
- MSS option negotiation in SYN/SYN-ACK (Kind=2, Len=4)
- Keep-alive (30s idle, 10s interval, 5 probes)
- Out-of-order segment reassembly (4-slot buffer)
Terminal & Testing:
- tcpconnect: active open + send "Hello, World!"
- tcplisten: passive open with syslog output
- tcphttp: HTTP/1.0 GET client
Also add push_trace() instrumentation to net, eth2, arp, ipv4,
icmp, udp, and dhcp entry points for call tracing, and register
tcp in net.init.
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2026-03-04 19:39:32 +00:00 |
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