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Now that we no longer demangle symbols in the kernel, we don't need to
provide stuff like malloc(), memchr(), free(), etc to the demangler.
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All deletes in kernel code should now be of known size. :^)
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C++14 gave us sized operator delete, but we haven't been taking
advantage of it. Let's get to a point where it can help us by
adding kfree_sized(void*, size_t).
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This removes some assertions from KLexicalPath::basename() by supporting
paths with trailing slashes, empty paths, paths consisting of only
slashes and paths with ending "." and ".." segments.
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Instead of returning char const*, we can also give you a StringView.
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This matches the formatting used in SysFS.
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Give them names that sound related to SysFS.
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Give them names that sound related to SysFS.
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Folders are a GUI concept, file systems have directories. :^)
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Give them names that sound related to SysFS.
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Let them access the class using public API instead.
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"Folder" is a GUI concept, let's call this "Directory".
Also, "System" is completely generic, so let's be more specific and
call this "SysFS..."
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Let's simplify the interface by not allowing lookup by Inode&.
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And move it to its own compilation unit.
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This matches our common naming style better.
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Pledge should check m_has_promises. Calling pledge("", nullptr)
does not fail on an already pledged process anymore.
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The spec requires a flush after setting the new buffer resource id,
which is required by QEMUs SDL backend but not the GTK backend. This
brings us in line with the spec and makes it work for the SDL backend.
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The System V ABI for both x86 and x86_64 requires that the stack pointer
is 16-byte aligned on entry. Previously we did not align the stack
pointer properly.
As far as "main" was concerned the stack alignment was correct even
without this patch due to how the C++ _start function and the kernel
interacted, i.e. the kernel misaligned the stack as far as the ABI
was concerned but that misalignment (read: it was properly aligned for
a regular function call - but misaligned in terms of what the ABI
dictates) was actually expected by our _start function.
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This involves refactoring VirtIOConsole into VirtIOConsole and
VirtIOConsolePort. VirtIOConsole is the VirtIODevice, it owns multiple
VirtIOConsolePorts as well as two control queues. Each
VirtIOConsolePort is a CharacterDevice.
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This allows two-way communication with the host through a VirtIOConsole.
This is necessary for features like clipboard sharing.
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We currently require PAE and not having it causes us to crash.
This turns that crash into an error message.
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By making sure the PhysicalPage instance is fully destructed the
allocators will have a chance to reclaim the PhysicalPageEntry for
free-list purposes. Just pass them the physical address of the page
that was freed, which is enough to lookup the PhysicalPageEntry later.
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By moving the PhysicalPage classes out of the kernel heap into a static
array, one for each physical page, we can avoid the added overhead and
easily find them by indexing into an array.
This also wraps the PhysicalPage into a PhysicalPageEntry, which allows
us to re-use each slot with information where to find the next free
page.
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We already use PAE for the NX bit, but this changes the PhysicalAddress
structure to be able to hold 64 bit physical addresses. This allows us
to use all the available physical memory.
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These are needed by `libcxxabi`'s demangle support. `memchr` is taken
straight-up from the `LibC/string.cpp` source code.
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If a non-const lvalue reference is passed to these constructors, the
converting constructor will be selected instead of the desired copy/move
constructor.
Since I needed to touch `KResultOr` anyway, I made the forwarding
converting constructor use `forward<U>` instead of `move`. This meant
that previously, if a lvalue was passed to it, a move operation took
place even if no `move()` was called on it. Member initializers and
if-else statements have been changed to match our current coding style.
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These functions are only used from within `dbgln_if` calls, so in
certain build configurations, they go unused. Similarly to variables, we
now signal to the compiler that we understand that these are not always
in use.
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`.text` segments with non-aligned offsets had their lengths applied to
the first page's base address. This meant that in some cases the last
PAGE_SIZE - 1 bytes weren't mapped. Previously, it did not cause any
problems as the GNU ld insists on aligning everything; but that's not
the case with the LLVM toolchain.
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Instead of just disabling interrupts and halting when entering the C++
section, just halt with a printed message indicating the error.
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