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2534 commits

Author SHA1 Message Date
Liav A
d83a3eff1f Kernel: Update Network adapter classes to use the PCI::Device class 
Those classes will inherit from the PCI::Device class, thus,
they can still implement IRQ handling.
 2020-02-24 11:27:03 +01:00
Liav A
73a7e5875e Kernel: Update PCI::Device class to use the new IRQHandler class 2020-02-24 11:27:03 +01:00
Liav A
ea1251d465 Kernel: Add HardwareTimer class 
This is an abstraction layer for future hardware timers
that will be implemented.
 2020-02-24 11:27:03 +01:00
Liav A
dd7522bdb2 Kernel: Add new IRQHandler class 
This class will replace the old IRQHandler class later.
 2020-02-24 11:27:03 +01:00
Liav A
b201b23363 Kernel: Add Interrupt Management and Generic Interrupt Handler 
The GenericInterruptHandler class will be used to represent
an abstract interrupt handler. The InterruptManagement class will
represent a centralized component to manage interrupts.
 2020-02-24 11:27:03 +01:00
Liav A
ebe30ed11e ACPI: Adding definitions for HPET 
Also, definitions were added for MADT entries, like IOAPIC and GSI
overriding information.
 2020-02-24 11:27:03 +01:00
Liav A
e760ebcacb Kernel: Add the IOAPIC class 
This class inherits from IRQController class, and represents
the 82093AA IOAPIC chip.
 2020-02-24 11:27:03 +01:00
Liav A
7d59a67504 Kernel: Add the PIC class 
This class inherits from IRQController class, and represents
the common Intel 8259 PIC chip.
 2020-02-24 11:27:03 +01:00
Liav A
b56afbea17 Kernel: Add IRQController class 
This class is an abstraction layer for different IRQ controllers
that are present in a typical system.
 2020-02-24 11:27:03 +01:00
Liav A
35f27231b3 Kernel: Fix a wrong debug message in ACPIStaticParser 2020-02-24 11:27:03 +01:00
Liav A
3539666ac9 Kernel: Add PCI helpers to enable and disable the interrupt line 2020-02-24 11:27:03 +01:00
Liav A
ca05d54b2b Kernel: Add MultiProcessor Parser 2020-02-24 11:27:03 +01:00
Andreas Kling
0763f67043 AK: Make Bitmap use size_t for its size 
Also rework its API's to return Optional<size_t> instead of int with -1
as the error value.
 2020-02-24 09:56:07 +01:00
thatlittlegit
ab9e5755ba Userland+Kernel: Set shutdown/reboot to only be run by the phys group 2020-02-23 22:03:03 +01:00
thatlittlegit
30556a0a93 SystemMenu: Move SystemDialog into SystemMenu and remove INI config 
I probably would've done INI config removal in another commit, but it
fit well here because I didn't want to pledge wpath for SystemMenu if I
didn't need to.

Frankly, that's something that I think should be done: allow ConfigFile
to be used read-only.
 2020-02-23 22:03:03 +01:00
Andreas Kling
bbc02af090 Demos: Remove silly HelloWorld2 demo 
This was just a tiny test app made with the old VisualBuilder. It's not
really useful for anything.
 2020-02-23 12:27:53 +01:00
Andreas Kling
7ec758773c Kernel: Dump all kernel regions when we hit a page fault during IRQ 
This way you can try to figure out what the faulting address is.
 2020-02-23 11:10:52 +01:00
Andreas Kling
a70cc5ca1d Kernel: Commit the entire region up front in KBuffer::copy() 
Since we know exactly how much physical memory we'll need, we might as
well commit it up front instead of letting page faults drive it.
 2020-02-23 11:10:52 +01:00
Andreas Kling
a731ccd4a0 Kernel: Build without debugging symbols by default 
Compiling with -g adds roughly 30% to kernel build times. Anyone who
wants this can turn it on locally instead.
 2020-02-22 21:27:08 +01:00
Andreas Kling
97e9deccf0 Ext2FS: Add Missing HashMap.h include 2020-02-22 16:37:51 +01:00
Andreas Kling
e334c36757 Kernel: Remove unnecessary allocation metadata from kmalloc() chunks 
Each allocation header was tracking its index into the chunk bitmap,
but that index can be computed from the allocation address anyway.

Removing this means that each allocation gets 4 more bytes of memory
and this avoids allocating an extra chunk in many cases. :^)
 2020-02-22 15:11:31 +01:00
Andreas Kling
3e973bfe14 Kernel: Make FileDescription slab-allocated 2020-02-22 14:37:58 +01:00
Andreas Kling
9fc54ba931 Kernel: Tweak SlabAllocator's slab sizes 
Nobody was using the 8-byte slab size, so get rid of it and move all of
its capacity to the new 64-byte slab size (which replaces 48-byte.)
 2020-02-22 14:36:45 +01:00
Andreas Kling
6428669a37 Kernel: Make Custody slab-allocated 2020-02-22 14:33:51 +01:00
Andreas Kling
ba83bf8a0d Kernel: Increase kmalloc chunk size from 8 bytes to 32 bytes 
This gives a huge speedup when running "git status" in a SerenityOS
repository directory. Most of the time was spent allocating strings.
 2020-02-22 14:18:34 +01:00
Andreas Kling
fc5ebe2a50 Kernel: Disown shared buffers on sys$execve() 
When committing to a new executable, disown any shared buffers that the
process was previously co-owning.

Otherwise accessing the same shared buffer ID from the new program
would cause the kernel to find a cached (and stale!) reference to the
previous program's VM region corresponding to that shared buffer,
leading to a Region* use-after-free.

Fixes #1270.
 2020-02-22 12:29:38 +01:00
Andreas Kling
ece2971112 Kernel: Disable profiling during the critical section of sys$execve() 
Since we're gonna throw away these stacks at the end of exec anyway,
we might as well disable profiling before starting to mess with the
process page tables. One less weird situation to worry about in the
sampling code.
 2020-02-22 11:09:03 +01:00
Andreas Kling
d7a13dbaa7 Kernel: Reset profiling state on exec() (but keep it going) 
We now log the new executable on exec() and throw away all the samples
we've accumulated so far. But profiling keeps going.
 2020-02-22 10:54:50 +01:00
Andreas Kling
983b4bd9f2 Kernel+ProfileViewer: Move symbolication to userspace for time profiles 
This makes the time profiles look like the memory profiles so we can
use the userspace symbolication code in ProfileViewer.
 2020-02-22 10:09:54 +01:00
Andreas Kling
94652fd2fb Kernel: Fully validate pointers when walking stack during profiling 
It's not enough to just check that things wouldn't page fault, we also
need to verify that addresses are accessible to the profiled thread.
 2020-02-22 10:09:54 +01:00
Andreas Kling
f020081a38 Kernel: Put "Couldn't find user region" spam behind MM_DEBUG 
This basically never tells us anything actionable anyway, and it's a
real annoyance when doing something validation-heavy like profiling.
 2020-02-22 10:09:54 +01:00
Andreas Kling
b6887bd9cd Ext2FS: The max current block count of a file is size/block_size 
Turns out that i_blocks does not take block list holes into account.
 2020-02-21 19:07:23 +01:00
Andreas Kling
b298c01e92 Kernel: Log instead of crashing when getting a page fault during IRQ 
This is definitely a bug, but it seems to happen randomly every now
and then and we need more info to track it down, so let's log for now.
 2020-02-21 19:05:45 +01:00
Andreas Kling
59c052a72a Ext2FS: Allow holes in block lists 
Linux creates holes in block lists for all-zero content. This is very
reasonable and we can now handle that situation as well.

Note that we're not smart enough to generate these holes ourselves yet,
but now we can at least read from such files.
 2020-02-21 17:50:51 +01:00
Andreas Kling
04e40da188 Kernel: Fix crash when reading /proc/PID/vmobjects 
InodeVMObjects can have nulled-out physical page slots. That just means
we haven't cached that page from disk right now.
 2020-02-21 16:03:56 +01:00
Andreas Kling
59b9e49bcd Kernel: Don't trigger page faults during profiling stack walk 
The kernel sampling profiler will walk thread stacks during the timer
tick handler. Since it's not safe to trigger page faults during IRQ's,
we now avoid this by checking the page tables manually before accessing
each stack location.
 2020-02-21 15:49:39 +01:00
Andreas Kling
f9a138aa4b Kernel: Commit the profiling sample buffer memory up front 
This avoids getting page faults while storing samples in the timer IRQ.
 2020-02-21 15:49:37 +01:00
Andreas Kling
8047ff8205 Kernel: Expose the underlying Region of a KBuffer 2020-02-21 15:49:35 +01:00
Andreas Kling
d46071c08f Kernel: Assert on page fault during IRQ 
We're not equipped to deal with page faults during an IRQ handler,
so add an assertion so we can immediately tell what's wrong.

This is why profiling sometimes hangs the system -- walking the stack
of the profiled thread causes a page fault and things fall apart.
 2020-02-21 15:49:34 +01:00
Andreas Kling
2a679f228e Kernel: Fix bitrotted DEBUG_IO logging 2020-02-21 15:49:30 +01:00
Sergey Bugaev
1d2986ea15 Kernel: Fix a panic in VFS::rename() 
If we get an -ENOENT when resolving the target because of some part, that is not
the very last part, missing, we should just return the error instead of panicking
later :^)

To test:
    $ mkdir /tmp/foo/
    $ mv /tmp/foo/ /tmp/bar/

Related to https://github.com/SerenityOS/serenity/issues/1253
 2020-02-20 19:13:20 +01:00
Sergey Bugaev
3439498744 Kernel: Support trailing slashes in VFS::mkdir() 
This is apparently a special case unlike any other, so let's handle it
directly in VFS::mkdir() instead of adding an alternative code path into
VFS::resolve_path().

Fixes https://github.com/SerenityOS/serenity/issues/1253
 2020-02-20 19:13:20 +01:00
Andreas Kling
7592f9afd5 AK: Use size_t for CircularQueue and CircularDeque 2020-02-20 13:20:34 +01:00
Andreas Kling
88b9fcb976 AK: Use size_t for ByteBuffer sizes 
This matches what we already do for string types.
 2020-02-20 13:20:34 +01:00
Andreas Kling
0ba458cfa0 Kernel+LibC: Add SO_REUSEADDR macro 
Note that this is not actually implemented, I'm just defining it.
 2020-02-20 06:57:01 +01:00
Andreas Kling
a87544fe8b Kernel: Refuse to allocate 0 bytes of virtual address space 2020-02-19 22:19:55 +01:00
Andreas Kling
f17c377a0c Kernel: Use bitfields in Region 
This makes Region 4 bytes smaller and we can use bitfield initializers
since they are allowed in C++20. :^)
 2020-02-19 12:03:11 +01:00
Andreas Kling
a31ca1282e Base: Rename /dev/psaux to /dev/mouse 
Since this device doesn't actually hand out raw PS/2 aux packets,
let's just call it "mouse" instead. :^)
 2020-02-18 14:30:39 +01:00
Andreas Kling
bead20c40f Kernel: Remove SmapDisabler in sys$create_shared_buffer() 2020-02-18 14:12:39 +01:00
Andreas Kling
9aa234cc47 Kernel: Reset FPU state on exec() 2020-02-18 13:44:27 +01:00