4a654bf093
kernel: Handle OOMs better and without deadlocking
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Use a separate task to do it.
Also fix a bug where the init thread would get no kernel stack ever since 5f698b477
2023-08-17 20:14:33 +02:00
d43590e68c
kernel: Improve Your Disk IO performance by 500% with this One Trick!
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continuous-integration/drone/push Build is failing
The trick being caching lol.
2023-08-16 14:54:13 +02:00
b63a8ff245
libluna: Move get_blocks_from_size to a new header and call it ceil_div instead
continuous-integration/drone/push Build is passing
2023-08-08 11:58:33 +02:00
7c254e5e15
kernel: Properly check memory bounds in strdup_from_user()
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continuous-integration/drone/push Build is passing
Missed this one in 097353e779
2023-08-08 10:27:19 +02:00
097353e779
kernel: Properly check memory bounds while touching user memory
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Before this patch, one byte of each page was being accessed without checking the page's permissions.
2023-08-07 22:49:00 +02:00
2572695c8d
kernel: Support mapping shared memory using mmap()
2023-08-02 22:20:05 +02:00
af26dce038
kernel: Zero physical frames instead of virtual pages
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continuous-integration/drone/push Build is passing
The memset() happens a bit earlier, and we don't have to remap the
mapped virtual memory.
2023-07-04 00:49:26 +02:00
bd757d204e
kernel+libos+libluna: Avoid copying and reallocation when creating Strings
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continuous-integration/drone/push Build is passing
This is done by reusing the existing buffers in Vector and Buffer instances.
2023-07-02 19:30:25 +02:00
7cace9a0d7
kernel: Provide more meaningful panic messages for critical failures
2023-06-17 19:43:25 +02:00
9bab4c62a1
kernel: Compilation fixes
continuous-integration/drone/push Build is passing
2023-05-07 21:42:03 +02:00
b25e212880
kernel: Make a generic function for checking memory flags
continuous-integration/drone/push Build is failing
2023-05-07 21:37:01 +02:00
95659639e5
kernel: Zero out allocated memory for userspace to avoid leaking sensitive data
continuous-integration/drone/push Build is passing
2023-04-17 20:11:07 +02:00
1f0e185904
kernel: Use try_set_value(_or_error) in various places
2023-04-07 10:55:04 +02:00
01813ff0dd
String: Rename from_string_literal to from_cstring
2023-03-29 17:34:30 +02:00
b6c35124d6
libluna: OwnedStringView -> String
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Also with inline storage!
2023-03-29 17:28:22 +02:00
b9e8030aac
kernel: Free the initial ramdisk memory after copying everything into the VFS
continuous-integration/drone/push Build is passing
2023-03-16 23:02:53 +01:00
02dbcbbfa1
kernel: Add strdup_from_user()
continuous-integration/drone/push Build is passing
2023-03-12 16:30:36 +01:00
f0a3f99cf9
MemoryManager: Initialize KernelVM at the end of init()
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KernelVM is not needed for MMU's init process anymore.
2023-02-27 13:24:58 +01:00
752dfdbf1c
MemoryManager: Reuse the existing mapping of physical memory that MMU has
continuous-integration/drone/pr Build is passing
2023-02-27 12:51:29 +01:00
8df441064f
x86_64/MMU: Map the physical address space using huge pages
2023-02-27 12:47:17 +01:00
426f6e4da8
x86_64: Allow mapping huge pages, but don't do it yet
2023-02-27 12:41:28 +01:00
794567327f
kernel, luna: Port non-VFS changes over from pull request #22
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continuous-integration/drone/push Build is passing
OwnedPtr, SharedPtr: Add operator bool
Option, Result: Make try_move_value() non-const since it modifies the Option
kernel: Switch to a stack we control for the main task as soon as we leave early boot
Heap: Fix GPF caused when making many small allocations
Heap: Avoid accessing a block after it's potentially deleted
luna: Skip UBSAN.cpp in CMakeLists as that's not implemented yet
luna: Use spinlocks in the heap implementation
kernel, luna: Move Spinlock.h to luna
Option: Use __builtin_launder to ensure that the compiler doesn't label this as UB
SharedPtr: Implement make_shared using adopt_shared
SharedPtr: Delete ptr on failure in all adopt_shared* functions
2023-02-25 17:09:03 +01:00
fd0e29ede5
kernel: Add FIXME in copy_to_user()/copy_from_user()
continuous-integration/drone/push Build is passing
2023-01-25 21:22:14 +01:00
1d92784608
luna, kernel: Replace some uses of char by truly 1-byte wide types
continuous-integration/drone/push Build is passing
2023-01-16 19:52:34 +01:00
79a5b98d65
Kernel: Keep the user pointer const through copy_from_user()
continuous-integration/drone/push Build is passing
2023-01-11 19:26:53 +01:00
6e4cd6300d
Kernel: Add copy_from_user() and copy_from_user_typed()
continuous-integration/drone/push Build is passing
2023-01-11 19:25:28 +01:00
84c82a4e75
luna, kernel: More constness
continuous-integration/drone/push Build is passing
2023-01-10 19:31:41 +01:00
c83f6c03b5
Bitmap: Add a 'find_and_toggle' method
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continuous-integration/drone/push Build is passing
Just like find(), but toggles the value when finding it.
Avoids doing this manually in MemoryManager and KernelVM.
2023-01-09 18:08:50 +01:00
4287ec6cb0
Bitmap: Introduce a new method 'find' and use it in MM and KernelVM
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continuous-integration/drone/push Build is passing
This method looks for the first bit with a value, optionally from a starting index, and returns its index.
This should be (haven't benchmarked) way faster than the manual way,
AKA what MM and KernelVM were doing.
This is due to this method using bit and byte manipulation tricks instead of just calling get() until getting the desired result :)
2023-01-09 17:59:52 +01:00
29bd8a69fa
MemoryManager: Add helper functions to validate arbitrary ranges of userspace memory
2023-01-07 01:39:33 +01:00
6e9b4491a6
MemoryManager: Add copy_to_user() and copy_to_user_typed()
2023-01-07 00:17:16 +01:00
caa3fe8c45
MemoryManager: Add validate_userspace_string()
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A bit crude, should be replaced by a strdup_from_user() helper to avoid touching userspace memory directly.
But it'll do for now.
2023-01-05 22:39:09 +01:00
c53bba0392
MemoryManager: Add an unmap_weak_and_free_vm() helper function
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This function mirrors unmap_owned_and_free_vm(), but using weak unmapping (does not free the underlying physical memory)
2023-01-05 21:50:06 +01:00
5854e5e530
Add newlines at end-of-file
2023-01-02 13:07:29 +01:00
6ff92b1714
MemoryManager: Add get_kernel_mapping_for_frames()
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This function allocates a continuous range of VM and maps the physical frames passed to said VM range.
2022-12-23 11:30:49 +01:00
60520dff4c
Make MemoryManager's scope guards more robust
continuous-integration/drone/push Build is passing
2022-12-19 11:55:53 +01:00
283e641ece
Spinlock+LockedValue: Remove init() functions
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Let's set the default (unlocked) value of Spinlock's underlying atomic to 0, so even if the constructor is not called it stays like that.
2022-12-18 20:36:15 +01:00
1b867151bd
MemoryManager: Run include-what-you-use
continuous-integration/drone/push Build is passing
2022-12-17 15:47:35 +01:00
132963070b
MemoryManager: Make some variables atomic and the frame bitmap a LockedValue
2022-12-17 10:56:24 +01:00
59765aa334
Rename String.h -> CString.h
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continuous-integration/drone/push Build is passing
Let's not confuse String.h with a managed string class, it's in fact the equivalent of the C stdlib's <string.h>
2022-12-16 20:40:04 +01:00
a32590ff8a
Call expect_value more
2022-12-16 19:44:33 +01:00
cedcfa9c63
Improve cleanup on MemoryManager failure + add methods that use KernelVM
continuous-integration/drone/push Build is passing
2022-12-16 19:36:38 +01:00
dad95a8160
Map the page bitmap to virtual memory
2022-12-07 10:58:59 +01:00
1ebd892c16
Convert uses of u64 to usize
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Not all of them, but if you're measuring a size it's more appropriate to use usize than u64.
2022-12-07 10:55:47 +01:00
39b310b6b9
Make alignment a template parameter to help the compiler optimize
continuous-integration/drone/push Build is passing
2022-12-06 19:27:58 +01:00
ba758bcef8
Initialize the KernelVM
2022-12-05 21:01:18 +01:00
ea7893ba71
Make CHECK_PAGE_ALIGNED use expect() instead of check()
2022-12-05 13:28:36 +01:00
55a30ac487
Make CHECK_PAGE_ALIGNED use expect() instead of check()
2022-12-05 13:26:50 +01:00
bfd4647467
Rename largest_free -> largest_free_entry
2022-12-05 13:26:09 +01:00
d9fc50f1ea
Make MemoryMapEntry have private fields with public getters
2022-12-05 13:23:01 +01:00
