beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-22 23:50:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6
217 commits 1 branch 0 tags 444 MiB
Commit graph

217 commits

This branch
This branch
All branches
Author SHA1 Message Date
Andreas Kling
42c88b5f2d Turn off the floppy drive after the boot loader is finished. 2018-10-27 00:40:42 +02:00
Andreas Kling
3db8d7ae1a Use Unix::stat for sys$lstat(). 2018-10-27 00:29:31 +02:00
Andreas Kling
509e5f9952 Add some basic address validation to syscalls. 
This is extremely ineffcient, but it doesn't really matter yet.
 2018-10-27 00:29:24 +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
c928b06218 Add a very hackish /proc/PID/stack. 
It walks the stack and identifies anything that looks like a kernel symbol.
This could be a lot more sophisticated.
 2018-10-26 22:33:15 +02:00
Andreas Kling
81627cf7d5 Add a simple /proc/mounts that enumerates the current VFS mounts. 2018-10-26 18:43:25 +02:00
Andreas Kling
a447359916 Add a /proc/kmalloc stats file. 2018-10-26 18:28:25 +02:00
Andreas Kling
edb81a635c Fix bug where you couldn't "cd .." into the root of a mounted fs. 2018-10-26 18:19:31 +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
10347b9ae8 Add ASSERT_INTERRUPTS_DISABLED in Task::fromPID(). 2018-10-26 15:11:29 +02:00
Andreas Kling
63e5583c18 Properly null-terminate the argv list created by sh. 2018-10-26 15:04:20 +02:00
Andreas Kling
1c45b28da6 Add sys$uname() and a /bin/uname utility. 2018-10-26 14:57:26 +02:00
Andreas Kling
384e2f24d4 Add per-task limit for open fd's. Hard-coded at 16 for now. 2018-10-26 14:30:38 +02:00
Andreas Kling
2749e7f1c2 Implement sys$chdir() and teach sh+ls to cd around and browse different dirs. 2018-10-26 14:24:11 +02:00
Andreas Kling
ac738b03d6 Add memcpy() and strcmp() to LibC. 2018-10-26 13:32:13 +02:00
Andreas Kling
0af9254812 If spawning a task fails after we did a partial ELF load, remap current. 
This is an annoying issue. It'd be nice if this code didn't have to worry
about preserving the calling task's mappings.
 2018-10-26 12:22:22 +02:00
Andreas Kling
546ddd7de0 Remove logspam in /dev/{full,null,zero} now that they work just fine. 
Also don't echo anything to console when putch'ing '\0'.
 2018-10-26 11:27:42 +02:00
Andreas Kling
6312c3f253 Fix mixup between /dev/null and /dev/zero device registration. 2018-10-26 11:25:46 +02:00
Andreas Kling
df87dda63c Implement argc/argv support for spawned tasks. 
Celebrate the new functionality with a simple /bin/cat implementation. :^)
 2018-10-26 11:16:56 +02:00
Andreas Kling
53abfa7ea1 Add sys$gethostname and /bin/hostname 2018-10-26 09:54:29 +02:00
Andreas Kling
3faaa3e04a Add /bin/false and /bin/true for fun. :^) 2018-10-25 21:39:37 +02:00
Andreas Kling
dc6f57f19c Add gettimeofday() syscall and LibC wrappers gettimeofday() and time(). 
This only has second accuracy right now, I'll work out subseconds later.
 2018-10-25 17:36:18 +02:00
Andreas Kling
5978185242 Add a "sleep" syscall that sleeps for N seconds. 2018-10-25 13:56:03 +02:00
Andreas Kling
c6f2890d8e Implement a basic way for read() to block. 
FileHandle gets a hasDataAvailableForRead() getter.
If this returns true in sys$read(), the task will block(BlockedRead) + yield.
The fd blocked on is stored in Task::m_fdBlockedOnRead.
The scheduler then looks at the state of that fd during the unblock phase.

This makes "sh" restful. :^)

There's still some problem with the kernel not surviving the colonel task
getting scheduled. I need to figure that out and fix it.
 2018-10-25 13:09:56 +02:00
Andreas Kling
ba56f4afde If no context switch occurs, add 1 to the timesScheduled() for current. 
This seems like more accurate accounting.
 2018-10-25 12:45:29 +02:00
Andreas Kling
571dc8234f Make the stage2 init task sleep dreamily when finished. 
Something is off about scheduling, I don't think the kernel is handing
out all the available time to processes that are available to run.
 2018-10-25 12:40:17 +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
82bbfa8496 Keyboard should support the space character (jeez!) 2018-10-25 12:10:25 +02:00
Andreas Kling
260b14e505 Implement errno in LibC. 
This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader.
I also added an strerror() so we can print out what the errors are.
 2018-10-25 12:06:50 +02:00
Andreas Kling
434b6a8688 Unify the Task constructors. 
There's now Task::create() and Task::createKernelTask().
 2018-10-25 11:17:47 +02:00
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