Andreas Kling
8e27cf2428
Cleanup.
2018-10-24 00:51:09 +02:00
Andreas Kling
57136ad87e
synthfs: generated files should have size=0.
...
This way we don't need to generate the file just to see how big it would get.
2018-10-24 00:50:23 +02:00
Andreas Kling
b40c851fce
Unbreak crashy user process test.
2018-10-24 00:35:07 +02:00
Andreas Kling
3253a23b91
Add a simplified waitpid() so that sh can wait on spawned commands.
2018-10-24 00:20:34 +02:00
Andreas Kling
018da1be11
Generalize the SpinLock and move it to AK.
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Add a separate lock to protect the VFS. I think this might be a good idea.
I'm not sure it's a good approach though. I'll fiddle with it as I go along.
It's really fun to figure out all these things on my own.
2018-10-23 23:34:05 +02:00
Andreas Kling
e4bfcd2346
Add "times scheduled" field to /proc/summary
2018-10-23 15:59:38 +02:00
Andreas Kling
44045b258c
Teach MM to flush individual TLB entries only.
2018-10-23 15:53:11 +02:00
Andreas Kling
3676214a62
Remove remains of the old "panel" task.
...
...and grow the console by 1 row! :^)
2018-10-23 15:47:03 +02:00
Andreas Kling
d90d125dfe
Add an undertaker task that is responsible for destroying dead tasks.
2018-10-23 15:43:05 +02:00
Andreas Kling
1c1d0f5362
ExecSpace should free its own allocations on destruction.
...
If hookableAlloc was used, we don't free anything. That's the client's
responsibility.
2018-10-23 15:31:23 +02:00
Andreas Kling
ccd15e0590
Various things:
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- putch syscall now directly calls Console::putChar().
- /proc/summary includes some info about kmalloc stats.
- Syscall entry is guarded by a simple spinlock.
- Unmap regions for crashed tasks.
2018-10-23 15:19:02 +02:00
Andreas Kling
c80a1f39ce
Minor userland tweaks.
2018-10-23 13:57:17 +02:00
Andreas Kling
71ed63c91d
Assume commands are binaries in /bin for now.
2018-10-23 13:05:50 +02:00
Andreas Kling
d133a2845f
Add missing TLB flushes.
2018-10-23 13:03:11 +02:00
Andreas Kling
77821da42f
Also send console output to port 0xe9 (bochs console.)
...
This is very handy for debugging.
2018-10-23 13:02:38 +02:00
Andreas Kling
63e253bac9
Generate a basic /proc/summary file with some info about all tasks.
2018-10-23 12:44:46 +02:00
Andreas Kling
ed2422d7af
Start adding a basic /proc filesystem and a "ps" utility.
2018-10-23 12:04:03 +02:00
Andreas Kling
98f76f0153
Flush the TLB after modifying page tables.
...
This is a very inefficient naive implementation, but it gets us going.
Mapping tasks in and out of a shared address space now totally works.
2018-10-23 11:03:56 +02:00
Andreas Kling
56ed448424
Move ELFLoader debug output behind flags.
...
The logging spam was out of control.
2018-10-23 11:03:26 +02:00
Andreas Kling
fe237ee215
Lots of hacking:
...
- Turn Keyboard into a CharacterDevice (85,1) at /dev/keyboard.
- Implement MM::unmapRegionsForTask() and MM::unmapRegion()
- Save SS correctly on interrupt.
- Add a simple Spawn syscall for launching another process.
- Move a bunch of IO syscall debug output behind DEBUG_IO.
- Have ASSERT do a "cli" immediately when failing.
This makes the output look proper every time.
- Implement a bunch of syscalls in LibC.
- Add a simple shell ("sh"). All it can do now is read a line
of text from /dev/keyboard and then try launching the specified
executable by calling spawn().
There are definitely bugs in here, but we're moving on forward.
2018-10-23 10:12:50 +02:00
Andreas Kling
72514c8b97
Don't use doubles in RandomDevice.
...
...since Computron doesn't have FPU support yet, I'm gonna avoid using it
here in Serenity for now.
2018-10-23 00:35:11 +02:00
Andreas Kling
c8b7173aa8
Add a CircularQueue template class to AK.
2018-10-22 22:46:02 +02:00
Andreas Kling
b824f15619
Launching an arbitrary ELF executable from disk works! :^)
...
This is so cool! It's a bit messy now with two Task constructors,
but eventually they should fold into a single constructor somehow.
2018-10-22 15:43:02 +02:00
Andreas Kling
befeabd8fe
Okay, with some mucking around, there is now a /bin/id and it runs!
...
It statically links against everything in LibC that it needs.
This will work just fine for a long time to come!
2018-10-22 14:41:54 +02:00
Andreas Kling
38a621c721
Link "id" against the LibC.
...
We can now produce what should essentially be a runnable Serenity executable.
2018-10-22 14:13:17 +02:00
Andreas Kling
63764b3a65
Import very modest Userland.
2018-10-22 14:06:22 +02:00
Andreas Kling
4cbf079a17
Start work on a standard C library. I'm calling it... LibC.
2018-10-22 13:57:25 +02:00
Andreas Kling
85bcf2ed0f
Add getgid() and getpid() syscalls. Prep for LibC.
2018-10-22 13:55:11 +02:00
Andreas Kling
bae59609e3
Move kprintf to its own file. It has nothing to do with VGA anymore.
2018-10-22 13:20:35 +02:00
Andreas Kling
702d308e67
Oops, StringImpl's "the empty string" global was not always initialized.
...
These "oops forgot to initialize" bugs are getting annoying...
2018-10-22 13:10:08 +02:00
Andreas Kling
c5e55f4737
Use UD2 instead of CLI;HLT for CRASH().
...
This way the kernel prints out a nice register dump so we can find
out where we crashed.
2018-10-22 13:07:06 +02:00
Andreas Kling
a9ca75c98b
Add IRQHandler class that can be subclasses to handle an IRQ.
...
Also move Keyboard to a class implementation using this pattern.
2018-10-22 12:58:29 +02:00
Andreas Kling
8f941561b4
Add ALWAYS_INLINE macro.
2018-10-22 12:55:59 +02:00
Andreas Kling
ba185e3eba
Zero out VirtualFileSystem::s_the in initializeGlobals().
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This catches attempts to access the vfs before it's been constructed.
2018-10-22 12:54:19 +02:00
Andreas Kling
e4afa2a041
Tweak _test.o to use the putch() syscall.
...
It's still running in kernel space. Once I make it possible for ELFLoader
to set up a ring 3 task, we'll really be cooking!
2018-10-22 11:53:59 +02:00
Andreas Kling
3a3c57357c
Add a sys$exit and make init_stage2 call it when finished.
2018-10-22 11:43:55 +02:00
Andreas Kling
79ffdb7205
A lot of hacking:
...
- More work on funneling console output through Console.
- init() now breaks off into a separate task ASAP.
- ..this leaves the "colonel" task as a simple hlt idle loop.
- Mask all IRQs on startup (except IRQ2 for slave passthru)
- Fix underallocation bug in Task::allocateRegion().
- Remember how many times each Task has been scheduled.
The panel and scheduling banner are disabled until I get things
working nicely in the (brave) new Console world.
2018-10-22 11:15:16 +02:00
Andreas Kling
df4fdd6f1e
printf format fixups in ELFLoader.
2018-10-22 00:29:35 +02:00
Andreas Kling
09fc9c0698
Make Console::m_rows/m_columns const for now.
2018-10-21 23:48:50 +02:00
Andreas Kling
e38f40a83c
Add an InlineLinkedList::containsSlow(T*) helper.
2018-10-21 23:48:27 +02:00
Andreas Kling
a89bebfda4
printf -> kprintf
2018-10-21 23:48:13 +02:00
Andreas Kling
fc88368582
Have Console::write() directly call vga_putch.
2018-10-21 22:44:26 +02:00
Andreas Kling
a70bfb87d5
Add a Console device and start refactoring screen output.
2018-10-21 21:59:43 +02:00
Andreas Kling
d5ec18027e
Protect the first 4 KB of memory.
...
This makes null pointers crashy, tremendously useful :^)
2018-10-21 21:59:11 +02:00
Andreas Kling
dd6706a1a1
Fix null deref in contextSwitch().
2018-10-21 21:57:43 +02:00
Andreas Kling
2f99ff801e
Move post-boot kernel stack pointer to 0x4000.
2018-10-21 21:51:12 +02:00
Andreas Kling
46ff281695
Turn the syscall interrupt into a trap (by switching the gate type.)
...
This leaves interrupts enabled while we're in the kernel, which is
precisely what we want.
This uncovered a horrendous problem with kernel tasks silently
overflowing their stacks. For now I've simply increased the stack size
but I need a more MMU-y solution for this eventually.
2018-10-19 11:31:18 +02:00
Andreas Kling
2d1d01661b
Add a way to initialize VFS globals.
...
This is needed since the kernel loader doesn't even zero out bss,
much less call any static constructors.
2018-10-19 11:20:49 +02:00
Andreas Kling
97e0d75bcb
ELFLoader works inside the kernel!
...
We load /_hello.o which just prints out a simple message.
It executes inside the kernel itself, so no fancy userspace process
or anything, but this is still so cool!
2018-10-18 15:46:08 +02:00
Andreas Kling
6ab0649ad6
ksprintf() should null-terminate strings.
2018-10-18 15:24:07 +02:00