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251 commits

Author SHA1 Message Date
Andreas Kling
9a086b2d35 Add a kmalloc_eternal() for things that will never be destroyed. 2018-10-31 23:19:15 +01:00
Andreas Kling
a8f36f72a8 printfing a number or string bigger than the field width should not crash. 2018-10-31 22:40:10 +01:00
Andreas Kling
9886b27d9c Add getpwent() family of functions to LibC. 
Also add a little /etc/passwd database. There's just me in there.
 2018-10-31 19:54:25 +01:00
Andreas Kling
8e640539ef Add an inode metadata cache to the ext2fs implementation. 2018-10-29 23:45:34 +01:00
Andreas Kling
e6284a8774 Fix broken SpinLock. 
The SpinLock was all backwards and didn't actually work. Fixing it exposed
how wrong most of the locking here is.

I need to come up with a better granularity here.
 2018-10-29 22:04:26 +01:00
Andreas Kling
c76dc9a047 Add /proc/mm and a /bin/mm utility that just dumps it. 
This shows some info about the MM. Right now it's just the zone count
and the number of free physical pages. Lots more can be added.

Also added "exit" to sh so we can nest shells and exit from them.

I also noticed that we were leaking all the physical pages, so fixed that.
 2018-10-28 10:28:21 +01:00
Andreas Kling
e904f193c1 Canonicalize the path used by sh. 
With a bunch of LibC work to support the feature. LibC now initializes
AK::StringImpl by default. It's now fine to use AK in LibC/Userland! :^)
 2018-10-28 09:36:21 +01:00
Andreas Kling
88ad59bfb1 Add a simple FileSystemPath class that can canonicalize paths. 
Also a simple StringBuilder to help him out.
 2018-10-28 08:54:20 +01:00
Andreas Kling
8289a5c93c Implement 'H' and 'J' escape sequences. 2018-10-27 23:42:20 +02:00
Andreas Kling
cc7e3519a6 Add a /bin/clear that prints the clear terminal escape sequence. 
It doesn't work yet, but it will!
 2018-10-27 17:39:08 +02:00
Andreas Kling
8f91a47aeb Add some basic field width support to printf(). 
Use it to make "ls" output a bit better. Also sys$spawn now fails with EACCES
if the path is not a file that's executable by the current uid/gid.
 2018-10-27 16:43:03 +02:00
Andreas Kling
601d0d1739 Better int hashing. This was going to bite me sooner or later. 2018-10-27 09:33:24 +02:00
Andreas Kling
2716a9e2d7 Greatly improve /proc/PID/stack by tracing the ebp frame chain. 
I also added a generator cache to FileHandle. This way, multiple
reads to a generated file (i.e in a synthfs) can transparently
handle multiple calls to read() without the contents changing
between calls.

The cache is discarded at EOF (or when the FileHandle is destroyed.)
 2018-10-27 00:14:24 +02:00
Andreas Kling
a32b3a3ddf Implement /proc/PID/vm. 
Refactored SyntheticFileSystem to maintain an arbitrary directory structure.
ProcFileSystem creates a directory entry in /proc for each new process.
 2018-10-26 17:44:19 +02:00
Andreas Kling
53abfa7ea1 Add sys$gethostname and /bin/hostname 2018-10-26 09:54:29 +02:00
Andreas Kling
fdc782c1d1 Add a very naive block cache to the DiskBackedFileSystem. 
This would be a lot better as an LRU. Right now it's a 32-slot
hash table with random eviction.
 2018-10-25 12:36:50 +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
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
82dae8fc90 Add a kmalloc lock. This definitely reduces flakiness. 2018-10-24 00:51:19 +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
ed2422d7af Start adding a basic /proc filesystem and a "ps" utility. 2018-10-23 12:04:03 +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
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
63764b3a65 Import very modest Userland. 2018-10-22 14:06:22 +02:00
Andreas Kling
85bcf2ed0f Add getgid() and getpid() syscalls. Prep for LibC. 2018-10-22 13:55:11 +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
c149d2a8f0 Build ELFLoader into Kernel. 2018-10-18 15:03:10 +02:00
Andreas Kling
347e202f7f Add size_t and ssize_t to kernel builds. 2018-10-17 16:47:19 +02:00
Andreas Kling
7580ac576f Make VFS host build work again. 2018-10-17 12:23:19 +02:00
Andreas Kling
d2425495ca VirtualFileSystem class builds inside Kernel. 2018-10-17 11:40:58 +02:00
Andreas Kling
9171521752 Integrate ext2 from VFS into Kernel. 2018-10-17 10:57:23 +02:00
Andreas Kling
aec8ab0a60 Add the basic character devices to kernel. 2018-10-16 14:33:16 +02:00
Andreas Kling
5d465582a3 Start fixing up AK to work inside the kernel. 2018-10-16 13:59:28 +02:00
Andreas Kling
1203c327c7 Merge some features from gerbert into OwnPtr and RetainPtr. 2018-10-16 12:21:06 +02:00
Andreas Kling
fd708a4cb1 Reduce dependence on STL. 2018-10-16 12:11:27 +02:00
Andreas Kling
0c1a4e8de3 Add String::substring(). 2018-10-16 12:07:17 +02:00
Andreas Kling
39444c5916 Fix HashTable::find() return iterator for items found in non-0 buckets. 2018-10-14 22:08:36 +02:00
Andreas Kling
560405667e Start using WeakPtr for some of the WindowManager window pointers. 2018-10-13 17:00:45 +02:00
Andreas Kling
3e9a45d7f4 Add WeakPtr/Weakable templates. 2018-10-13 15:41:24 +02:00
Andreas Kling
b7efd92937 Make SinglyLinkedList destruction actually work. 2018-10-13 14:29:00 +02:00
Andreas Kling
969334505d Add HashMap::remove(). 2018-10-13 14:23:47 +02:00
Andreas Kling
c2ef54c044 Add HashTable::remove() and fix a bug where ConstIterator would skip the first. 2018-10-13 14:22:09 +02:00
Andreas Kling
f794190de0 Add a DoublyLinkedList template and start using it for HashTable. 2018-10-13 13:50:44 +02:00
Andreas Kling
7777c8844b Add Vector::remove(). 2018-10-13 01:17:36 +02:00
Andreas Kling
750b27cb07 Ext2FileSystem::readInode() should return an empty buffer for 0-length files. 2018-10-13 00:50:35 +02:00
Andreas Kling
c37ded0ae4 Support arbitrary pointer traits. 2018-10-11 16:52:30 +02:00
Andreas Kling
f282df6617 AK::Buffer should not free unowned backing stores, duh. 2018-10-11 12:30:35 +02:00
Andreas Kling
a181a8f6e7 Run without SimpleMalloc locally for now. 2018-10-10 15:11:43 +02:00
Andreas Kling
5a30055157 Import all this stuff into a single repo called Serenity. 2018-10-10 11:53:07 +02:00