serenity - The Serenity Operating System 🐞

Age	Commit message (Collapse)	Author
2021-11-08	Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>	Andreas Kling
	We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
2021-09-07	Kernel: Make UserOrKernelBuffer return KResult from read/write/memset	Andreas Kling
	This allows us to simplify a whole bunch of call sites with TRY(). :^)
2021-09-06	Kernel: Make KString factories return KResultOr + use TRY() everywhere	Andreas Kling
	There are a number of places that don't have an error propagation path right now, so I've added FIXME's about that.
2021-09-05	Kernel: Make copy_{from,to}_user() return KResult and use TRY()	Andreas Kling
	This makes EFAULT propagation flow much more naturally. :^)
2021-09-05	Kernel: Remove UserOrKernelBuffer::copy_into_string()	Andreas Kling
	All former users of this API have been converted to use KString. :^)
2021-08-06	Kernel: Move Kernel/Memory/ code into Kernel::Memory namespace	Andreas Kling

2021-08-06	Kernel: Rename Kernel/VM/ to Kernel/Memory/	Andreas Kling
	This directory isn't just about virtual memory, it's about all kinds of memory management.
2021-07-17	Kernel: Add an API for turning a UserOrKernelBuffer into a KString	Andreas Kling

2021-04-22	Everything: Move to SPDX license identifiers in all files.	Brian Gianforcaro
	SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2020-09-22	AK: Add StringBuilder::appendff using the new format.	asynts
	StringBuilder::appendf was already used, thus this name. If we some day replace all usages of printf, we could rename this method.
2020-09-13	Kernel: Make copy_to/from_user safe and remove unnecessary checks	Tom
	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.