Andreas Kling
dff516f6d0
Remove unused Task states.
2018-10-25 10:51:51 +02:00
Andreas Kling
4bd69d4352
Remove old DatBuffer class.
...
(also increase the number of sectors loaded by the bootloader in the
since I just noticed we were at the limit. This is not the ideal way
of doing this.)
2018-10-25 10:50:30 +02:00
Andreas Kling
de7c54545a
Remove age-old IPC stuff that wasn't working anyway.
...
I'll make a fresh start with IPC code when I get there.
2018-10-25 10:39:39 +02:00
Andreas Kling
ce126120d1
Add a few more InterruptDisablers.
2018-10-25 10:33:10 +02:00
Andreas Kling
1c49b34b93
Selectively disable interrupts in MM.
...
Also added an ASSERT_INTERRUPTS_DISABLED() macro.
2018-10-25 10:15:28 +02:00
Andreas Kling
86a547dcac
Add parent PIDs to /proc/summary
2018-10-25 10:15:13 +02:00
Andreas Kling
16f318408d
ELFLoader should fail with an error message for unresolved symbols.
2018-10-25 10:02:04 +02:00
Andreas Kling
ec1d16b307
Add a "pwd" utility to userland.
...
It's implemented as a separate process. How cute is that.
Tasks now have a current working directory. Spawned tasks inherit their
parent task's working directory.
Currently everyone just uses "/" as there's no way to chdir().
2018-10-24 14:28:22 +02:00
Andreas Kling
eb4074bb9d
Put more logspam behind EXT2_DEBUG.
2018-10-24 13:38:53 +02:00
Andreas Kling
5f36a5f22e
Add an lstat() syscall and use it to make "ls" nicer.
2018-10-24 13:19:36 +02:00
Andreas Kling
bca4b71bfa
Lots of hacking to make a very simple "ls" utility.
...
I added a dead-simple malloc that only allows allocations < 4096 bytes.
It just forwards the request to mmap() every time.
I also added simplified versions of opendir() and readdir().
2018-10-24 12:50:07 +02:00
Andreas Kling
0c5bbac86e
Add an InterruptDisabler helper class and use that for kmalloc.
...
The naive spinlock was not nearly enough to protect kmalloc from
reentrancy problems.
I don't want to deal with coming up with a fancy lock for kmalloc
right now, so I made an InterruptDisabler thingy instead.
It does CLI and then STI iff interrupts were previously enabled.
2018-10-24 11:07:53 +02:00
Andreas Kling
9a296d63f3
Add simplified mmap() and munmap() syscalls.
2018-10-24 09:48:41 +02:00
Andreas Kling
a5caf7ca99
Make the kmalloc global stats variable volatile.
...
I know I'm praying for cargo here, but this does fix a weird issue
where logging the sum_alloc and sum_free globals wouldn't display
symmetric values all the time.
2018-10-24 01:04:06 +02:00
Andreas Kling
82dae8fc90
Add a kmalloc lock. This definitely reduces flakiness.
2018-10-24 00:51:19 +02:00
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.
...
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:
...
- 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().
...
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