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2021-04-03Kernel: Introduce a new HID subsystemLiav A
The end goal of this commit is to allow to boot on bare metal with no PS/2 device connected to the system. It turned out that the original code relied on the existence of the PS/2 keyboard, so VirtualConsole called it even though ACPI indicated the there's no i8042 controller on my real machine because I didn't plug any PS/2 device. The code is much more flexible, so adding HID support for other type of hardware (e.g. USB HID) could be much simpler. Briefly describing the change, we have a new singleton called HIDManagement, which is responsible to initialize the i8042 controller if exists, and to enumerate its devices. I also abstracted a bit things, so now every Human interface device is represented with the HIDDevice class. Then, there are 2 types of it - the MouseDevice and KeyboardDevice classes; both are responsible to handle the interface in the DevFS. PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are responsible for handling the hardware-specific interface they are assigned to. Therefore, they are inheriting from the IRQHandler class.
2021-03-31Kernel: Added TIOCSTI ioctl placeholder (#6037)Baitinq
Added a dummy TIOCSTI ioctl placeholder. This is a dangerous ioctl that can be used to inject input into a tty. Added for compatibility. Always fails with EIO.
2021-03-21Kernel::CPU: Move headers into common directoryHendiadyoin1
Alot of code is shared between i386/i686/x86 and x86_64 and a lot probably will be used for compatability modes. So we start by moving the headers into one Directory. We will probalby be able to move some cpp files aswell.
2021-03-17Kernel: Refactor storage stack with u64 as file operations offsetJean-Baptiste Boric
2021-03-02Kernel: Make kgettimeofday use AK::TimeBen Wiederhake
2021-02-27LibVT: Make VT::Line use a Vector for storageAndreas Kling
This is preparation for non-destructive terminal resizing which will require more dynamic storage for lines.
2021-02-23Everywhere: Rename ASSERT => VERIFYAndreas Kling
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-21Kernel: Silence TTY signal debug spamAndreas Kling
2021-02-19Kernel: Slap UNMAP_AFTER_INIT on a whole bunch of functionsAndreas Kling
There's no real system here, I just added it to various functions that I don't believe we ever want to call after initialization has finished. With these changes, we're able to unmap 60 KiB of kernel text after init. :^)
2021-02-17Kernel: Convert snprintf() => String::formatted()/number()Andreas Kling
2021-02-08Everywhere: Replace dbgln<flag>(...) with dbgln_if(flag, ...)AnotherTest
Replacement made by `find Kernel Userland -name '*.h' -o -name '*.cpp' | sed -i -Ee 's/dbgln\b<(\w+)>\(/dbgln_if(\1, /g'`
2021-01-26Meta: Split debug defines into multiple headers.asynts
The following script was used to make these changes: #!/bin/bash set -e tmp=$(mktemp -d) echo "tmp=$tmp" find Kernel \( -name '*.cpp' -o -name '*.h' \) | sort > $tmp/Kernel.files find . \( -path ./Toolchain -prune -o -path ./Build -prune -o -path ./Kernel -prune \) -o \( -name '*.cpp' -o -name '*.h' \) -print | sort > $tmp/EverythingExceptKernel.files cat $tmp/Kernel.files | xargs grep -Eho '[A-Z0-9_]+_DEBUG' | sort | uniq > $tmp/Kernel.macros cat $tmp/EverythingExceptKernel.files | xargs grep -Eho '[A-Z0-9_]+_DEBUG' | sort | uniq > $tmp/EverythingExceptKernel.macros comm -23 $tmp/Kernel.macros $tmp/EverythingExceptKernel.macros > $tmp/Kernel.unique comm -1 $tmp/Kernel.macros $tmp/EverythingExceptKernel.macros > $tmp/EverythingExceptKernel.unique cat $tmp/Kernel.unique | awk '{ print "#cmakedefine01 "$1 }' > $tmp/Kernel.header cat $tmp/EverythingExceptKernel.unique | awk '{ print "#cmakedefine01 "$1 }' > $tmp/EverythingExceptKernel.header for macro in $(cat $tmp/Kernel.unique) do cat $tmp/Kernel.files | xargs grep -l $macro >> $tmp/Kernel.new-includes ||: done cat $tmp/Kernel.new-includes | sort > $tmp/Kernel.new-includes.sorted for macro in $(cat $tmp/EverythingExceptKernel.unique) do cat $tmp/Kernel.files | xargs grep -l $macro >> $tmp/Kernel.old-includes ||: done cat $tmp/Kernel.old-includes | sort > $tmp/Kernel.old-includes.sorted comm -23 $tmp/Kernel.new-includes.sorted $tmp/Kernel.old-includes.sorted > $tmp/Kernel.includes.new comm -13 $tmp/Kernel.new-includes.sorted $tmp/Kernel.old-includes.sorted > $tmp/Kernel.includes.old comm -12 $tmp/Kernel.new-includes.sorted $tmp/Kernel.old-includes.sorted > $tmp/Kernel.includes.mixed for file in $(cat $tmp/Kernel.includes.new) do sed -i -E 's/#include <AK\/Debug\.h>/#include <Kernel\/Debug\.h>/' $file done for file in $(cat $tmp/Kernel.includes.mixed) do echo "mixed include in $file, requires manual editing." done
2021-01-25Everywhere: Debug macros instead of constexpr.asynts
This was done with the following script: find . \( -name '*.cpp' -o -name '*.h' -o -name '*.in' \) -not -path './Toolchain/*' -not -path './Build/*' -exec sed -i -E 's/dbgln<debug_([a-z_]+)>/dbgln<\U\1_DEBUG>/' {} \; find . \( -name '*.cpp' -o -name '*.h' -o -name '*.in' \) -not -path './Toolchain/*' -not -path './Build/*' -exec sed -i -E 's/if constexpr \(debug_([a-z0-9_]+)/if constexpr \(\U\1_DEBUG/' {} \;
2021-01-25Everywhere: Remove unnecessary debug comments.asynts
It would be tempting to uncomment these statements, but that won't work with the new changes. This was done with the following commands: find . \( -name '*.cpp' -o -name '*.h' -o -name '*.in' \) -not -path './Toolchain/*' -not -path './Build/*' -exec awk -i inplace '$0 !~ /\/\/#define/ { if (!toggle) { print; } else { toggle = !toggle } } ; $0 ~/\/\/#define/ { toggle = 1 }' {} \; find . \( -name '*.cpp' -o -name '*.h' -o -name '*.in' \) -not -path './Toolchain/*' -not -path './Build/*' -exec awk -i inplace '$0 !~ /\/\/ #define/ { if (!toggle) { print; } else { toggle = !toggle } } ; $0 ~/\/\/ #define/ { toggle = 1 }' {} \;
2021-01-23Kernel: Evaluate block conditions inside VirtualConsole::emit()Jean-Baptiste Boric
This makes text mode boot usable again, because the shell never received keyboard input otherwise.
2021-01-22Kernel: Make device generate their own namesJean-Baptiste Boric
Besides removing the monolithic DevFSDeviceInode::determine_name() method, being able to determine a device's name inside the /dev hierarchy outside of DevFS has its uses.
2021-01-22Everywhere: Replace a bundle of dbg with dbgln.asynts
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.
2021-01-22Everywhere: Replace a bundle of dbg with dbgln.asynts
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.
2021-01-22Kernel: Unsupported TTY ioctls should return EINVAL gracefullyTom
Fixes #4971
2021-01-20Kernel+LibC: Turn errno codes into a strongly typed enumAndreas Kling
..and allow implicit creation of KResult and KResultOr from ErrnoCode. This means that kernel functions that return those types can finally do "return EINVAL;" and it will just work. There's a handful of functions that still deal with signed integers that should be converted to return KResults.
2021-01-11Kernel: Only send SIGTTOU if TTY termios has TOSTOP flagAndreas Kling
Fixes #4909
2021-01-11Kernel: Convert a bunch of String::format() => String::formatted()Andreas Kling
2021-01-11Everywhere: Replace a bundle of dbg with dbgln.asynts
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.Everything:
2021-01-10Kernel: Defer handling of key press events in VirtualConsoleAndrew Kaster
Trying to pass these onto the Terminal while handling an IRQ is a recipe for disaster. Use Processor::deferred_call_queue to create an ad-hoc "second half" of the interrupt handler. Fixes #4889
2021-01-10LibVT: Respect the Negative attribute when drawing textAnotherTest
This makes the "reverse video" SGR actually work.
2021-01-09Everywhere: Replace a bundle of dbg with dbgln.asynts
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.Everything: The modifications in this commit were automatically made using the following command: find . -name '*.cpp' -exec sed -i -E 's/dbg\(\) << ("[^"{]*");/dbgln\(\1\);/' {} \;
2021-01-03Kernel: Improve ProcFS behavior in low memory conditionsTom
When ProcFS could no longer allocate KBuffer objects to serve calls to read, it would just return 0, indicating EOF. This then triggered parsing errors because code assumed it read the file. Because read isn't supposed to return ENOMEM, change ProcFS to populate the file data upon file open or seek to the beginning. This also means that calls to open can now return ENOMEM if needed. This allows the caller to either be able to successfully open the file and read it, or fail to open it in the first place.
2020-12-31Everywhere: Re-format with clang-format-11Linus Groh
Compared to version 10 this fixes a bunch of formatting issues, mostly around structs/classes with attributes like [[gnu::packed]], and incorrect insertion of spaces in parameter types ("T &"/"T &&"). I also removed a bunch of // clang-format off/on and FIXME comments that are no longer relevant - on the other hand it tried to destroy a couple of neatly formatted comments, so I had to add some as well.
2020-12-27Kernel: Add a method to determine the desired permissions of a DeviceLiav A
This method will be used later in DevFS, to set the appropriate permissions for each device node.
2020-12-21Everywhere: Switch from (void) to [[maybe_unused]] (#4473)Lenny Maiorani
Problem: - `(void)` simply casts the expression to void. This is understood to indicate that it is ignored, but this is really a compiler trick to get the compiler to not generate a warning. Solution: - Use the `[[maybe_unused]]` attribute to indicate the value is unused. Note: - Functions taking a `(void)` argument list have also been changed to `()` because this is not needed and shows up in the same grep command.
2020-11-30Kernel: Move block condition evaluation out of the SchedulerTom
This makes the Scheduler a lot leaner by not having to evaluate block conditions every time it is invoked. Instead evaluate them as the states change, and unblock threads at that point. This also implements some more waitid/waitpid/wait features and behavior. For example, WUNTRACED and WNOWAIT are now supported. And wait will now not return EINTR when SIGCHLD is delivered at the same time.
2020-11-10AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safeTom
This makes most operations thread safe, especially so that they can safely be used in the Kernel. This includes obtaining a strong reference from a weak reference, which now requires an explicit call to WeakPtr::strong_ref(). Another major change is that Weakable::make_weak_ref() may require the explicit target type. Previously we used reinterpret_cast in WeakPtr, assuming that it can be properly converted. But WeakPtr does not necessarily have the knowledge to be able to do this. Instead, we now ask the class itself to deliver a WeakPtr to the type that we want. Also, WeakLink is no longer specific to a target type. The reason for this is that we want to be able to safely convert e.g. WeakPtr<T> to WeakPtr<U>, and before this we just reinterpret_cast the internal WeakLink<T> to WeakLink<U>, which is a bold assumption that it would actually produce the correct code. Instead, WeakLink now operates on just a raw pointer and we only make those constructors/operators available if we can verify that it can be safely cast. In order to guarantee thread safety, we now use the least significant bit in the pointer for locking purposes. This also means that only properly aligned pointers can be used.
2020-10-03Everywhere: Fix more typosLinus Groh
2020-09-13Kernel: Make copy_to/from_user safe and remove unnecessary checksTom
Since the CPU already does almost all necessary validation steps for us, we don't really need to attempt to do this. Doing it ourselves doesn't really work very reliably, because we'd have to account for other processors modifying virtual memory, and we'd have to account for e.g. pages not being able to be allocated due to insufficient resources. So change the copy_to/from_user (and associated helper functions) to use the new safe_memcpy, which will return whether it succeeded or not. The only manual validation step needed (which the CPU can't perform for us) is making sure the pointers provided by user mode aren't pointing to kernel mappings. To make it easier to read/write from/to either kernel or user mode data add the UserOrKernelBuffer helper class, which will internally either use copy_from/to_user or directly memcpy, or pass the data through directly using a temporary buffer on the stack. Last but not least we need to keep syscall params trivial as we need to copy them from/to user mode using copy_from/to_user.
2020-09-09Kernel+LibC+UE: Introduce SIGINFO (generated with ^T)Andreas Kling
This signal is ignored by default, but can be caught to implement state reporting a la BSD. :^)
2020-09-06Kernel: Track time-of-last-write in SlavePTY and report it as mtimeAndreas Kling
2020-09-06Kernel: Remove bogus FIXME in TTY::write()Andreas Kling
Failure to send SIGTTOU to the current process is not something that should cause write() to fail with -ESRCH.
2020-08-25Kernel: Switch singletons to use new Singleton classTom
MemoryManager cannot use the Singleton class because MemoryManager::initialize is called before the global constructors are run. That caused the Singleton to be re-initialized, causing it to create another MemoryManager instance. Fixes #3226
2020-08-22Kernel: Prefer snprintf over sprintfBen Wiederhake
2020-08-22Revert "Kernel: Switch singletons to use new Singleton class"Andreas Kling
This reverts commit f48feae0b2a300992479abf0b2ded85e45ac6045.
2020-08-22Revert "Kernel: Move Singleton class to AK"Andreas Kling
This reverts commit f0906250a181c831508a45434b9f645ff98f33e4.
2020-08-22Revert "AK: Get rid of make_singleton function"Andreas Kling
This reverts commit 5a98e329d157a2db8379e0c97c6bdc1328027843.
2020-08-22AK: Get rid of make_singleton functionTom
Just default the InitFunction template argument.
2020-08-22Kernel: Move Singleton class to AKTom
2020-08-21Kernel: Switch singletons to use new Singleton classTom
Fixes #3226
2020-08-19Kernel: Distinguish between new and old process groups with equal pgidsAnotherTest
This does not add any behaviour change to the processes, but it ties a TTY to an active process group via TIOCSPGRP, and returns the TTY to the kernel when all processes in the process group die. Also makes the TTY keep a link to the original controlling process' parent (for SIGCHLD) instead of the process itself.
2020-08-10Kernel: PID/PGID typingBen Wiederhake
This compiles, and fixes two bugs: - setpgid() confusion (see previous commit) - tcsetpgrp() now allows to set a non-empty process group even if the group leader has already died. This makes Serenity slightly more POSIX-compatible.
2020-08-06Kernel: Store TTY's foreground process as a WeakPtr<Process>Andreas Kling
This ensures that we don't leave a stale PGID assigned to the TTY after the process exits, which would make PID recycling attacks possible.
2020-08-06Kernel: Send a SIGCHLD to the parent upon suspension of a processAnotherTest
...that is controlling a TTY.
2020-08-05Unicode: Try s/codepoint/code_point/g againNico Weber
This time, without trailing 's'. Ran: git grep -l 'codepoint' | xargs sed -ie 's/codepoint/code_point/g
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