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31 Commits

Author SHA1 Message Date
Drew Galbraith b5ad454ad1 Move Process & Thread to the object folder. 2023-06-06 20:18:53 -07:00
Drew Galbraith 4e278a4664 Make a KernelObject base class for all Capabilities. 2023-06-06 20:13:07 -07:00
Drew Galbraith d358c1d672 Move process be to RefCounted 2023-06-06 19:12:46 -07:00
Drew Galbraith 2e1357255c Create a RefCounted type and use it for Thread. 
This should prevent me from actually creating 2 shared ptrs of
a single kernel object with their separate ref counts.
 2023-06-06 19:05:03 -07:00
Drew Galbraith d9b17d96d7 Cleanup Thread constructor 2023-06-06 18:40:32 -07:00
Drew Galbraith b0c2a6732b Always create threads in CREATED state. 
Simplify the process class to have threads marked as runnable
separately.
 2023-06-06 16:27:25 -07:00
Drew Galbraith ef8eb5d993 Add a threading syscall API. 2023-06-06 16:24:03 -07:00
Drew Galbraith a092a57483 Begin defining the process/thread api 2023-06-06 15:01:31 -07:00
Drew Galbraith 69b5cd001f Add a skeleton framework for capabilities. 
Use the first capability to spawn a child process.
 2023-05-30 23:55:42 -07:00
Drew Galbraith 9e3df0ccd0 Add pid/tid to all log messages 2023-05-30 23:22:29 -07:00
Drew Galbraith 2eefda6114 add a class to allocate and manage user space stacks 2023-05-30 22:35:57 -07:00
Drew Galbraith 1db93e5b12 Move PML4 initialization into the VirtualMemory class. 2023-05-30 21:39:19 -07:00
Drew Galbraith f22dd66c8d Manage KernelStacks separately rather than just allocing bytes. 
Create a global KernelStackManager that will handle the relevant allocs.
 2023-05-30 21:28:44 -07:00
Drew Galbraith 3c3341a90f Add a process spawn syscall and use it to start a proc. 
Also add a skeleton VirtualMemory manager to be used per process.
 2023-05-30 20:55:03 -07:00
Drew Galbraith b9b45c5e45 Add the ability to copy memory to non resident process. 
Use/Test this by loading the user space elf from the kernel process
before it starts rather than as a part of the first thread.

This simplifies thread start a fair bit.
 2023-05-30 01:27:47 -07:00
Drew Galbraith de49dcc01a Move scheduler to new global class format. 2023-05-29 23:48:32 -07:00
Drew Galbraith 7fe6c24aa5 Add a ProcessManager class to store Process objects. 
Trying out a new method for exposing global objects directly via a
variable.
 2023-05-29 23:35:44 -07:00
Drew Galbraith b58186265e Split Yield and Preempt into separate scheduling functions. 
This switch makes the logic for each much easier to parse.
 2023-05-29 23:09:39 -07:00
Drew Galbraith 3fee5ac9d7 Rework scheduler to store the current thread separately. 
This works better with the sleep thread and lets us check state
transitions more easily.
 2023-05-29 22:54:22 -07:00
Drew Galbraith 80d2bf1aaa Move Processes and Threads to be stored in SharedPtr 
Reference counting lets us pass these around a bit more easily.

SharedPtr was lightly tested using uint64_t in the main zion funcion.

Also add a sleep functionality instead of panicking. Functionally the
same right now since we don't preempt.
 2023-05-29 15:50:38 -07:00
Drew Galbraith 9f3ffbf5b4 Move Process to storing Threads in a linked list. 
This should really be a vector or hashmap of some sort but this is fine
for now.
 2023-05-29 15:08:02 -07:00
Drew Galbraith 5cab9f843e Move process list to a linked list. 
Add basic iteration ability to the linked list.
 2023-05-29 14:59:23 -07:00
Drew Galbraith 71196dc90f Move scheduler threads to a linked list implementation. 
Removes the internal next ptr from the Thread class.

We avoid doing a memory operation when scheduling on yield because we
simply cycle the item to the back of the list.
 2023-05-29 14:32:49 -07:00
Drew Galbraith a06c9dced4 Add thread and process states. 
Add a thread exit call.
 2023-05-29 13:51:03 -07:00
Drew Galbraith 7184f527a0 Jump to user mode. 
This instantly creates a page fault as we always map pages with ring 0
permissions.
 2023-05-29 13:06:08 -07:00
Drew Galbraith aefb4f082b Add a kernel ELF module and load it in a new process. 
Don't yet jump to userspace.
 2023-05-29 00:32:54 -07:00
Drew Galbraith f86bbe6ea9 Wireframe for syscalls in place 2023-05-18 16:03:09 -07:00
Drew Galbraith d3024211a7 Cycle through multiple tasks in multiple processes 2023-05-18 13:56:54 -07:00
Drew Galbraith 0d275c72a1 Have processes enqueue their own threads 2023-05-18 13:28:22 -07:00
Drew Galbraith cb41953354 Scheduler with working threads. 
Currently only one process but it is a start.
 2023-05-18 13:24:02 -07:00
Drew Galbraith 960cbf9519 Add Scheduler wireframe. 
Right now does nothing but has containing classes for process and thread
information.
 2023-05-18 12:43:53 -07:00