03adaa356c
kernel: Avoid printing keypresses twice
2023-03-23 21:33:50 +01:00
cda036ce70
ConsoleDevice: Use a temporary buffer for backspace handling
continuous-integration/drone/push Build is failing
2023-03-23 21:22:12 +01:00
d33fccc66f
kernel: Implement reading from /dev/console
2023-03-19 19:15:19 +01:00
51f0bdff0e
kernel+libc: Add O_NONBLOCK
continuous-integration/drone/push Build is passing
2023-03-19 11:25:14 +01:00
41514d9ad2
kernel: Add support for blocking reads
2023-03-19 11:21:50 +01:00
cd00e41f59
arch/x86_64: Decode keyboard scancodes
continuous-integration/drone/push Build is passing
2023-03-19 11:17:43 +01:00
54f2d35416
kernel: Add the fork() system call
2023-03-18 23:45:48 +01:00
a4ac3c85ed
kernel+libc: Copy argv to userspace
continuous-integration/drone/push Build is passing
2023-03-18 22:25:19 +01:00
0b00dc3fe4
kernel/exec: Rename item to string_addr
continuous-integration/drone/push Build is passing
2023-03-18 21:56:34 +01:00
7f50893786
kernel/exec: Copy argv from userspace
continuous-integration/drone/push Build is passing
2023-03-18 21:55:16 +01:00
49952320d6
kernel+libluna: Remove console_write entirely
continuous-integration/drone/push Build is passing
2023-03-18 20:12:59 +01:00
6a6a56a8b4
kernel: Make /dev/console actually respect the length parameter instead of trusting userspace's null terminators
2023-03-18 20:10:00 +01:00
d01ba20749
kernel/TextConsole: Add a write() function that accepts a fixed-size buffer instead of relying on null terminators
2023-03-18 20:09:10 +01:00
629ed9e43b
libc: Start switching to /dev/console for console IO and add a proper init
2023-03-18 19:23:18 +01:00
7173c05a22
kernel: Add support for special device files and add a mknod() syscall
2023-03-18 09:10:33 +01:00
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
59838f1225
kernel: Replace some raw divisions with get_blocks_from_size()
2023-03-16 23:01:35 +01:00
8c72e9a49a
kernel: Add an exec() system call
...
continuous-integration/drone/push Build is passing
Doesn't support arguments or environment for now.
2023-03-16 22:44:58 +01:00
08c888eaae
kernel+libc: Remove (de)allocate_memory and replace it with POSIX mmap
continuous-integration/drone/push Build is passing
2023-03-14 20:43:15 +01:00
d66506256d
kernel/VFS+libc: Introduce modes
continuous-integration/drone/push Build is passing
2023-03-12 16:55:46 +01:00
02dbcbbfa1
kernel: Add strdup_from_user()
continuous-integration/drone/push Build is passing
2023-03-12 16:30:36 +01:00
682d3c753e
kernel+libc: Add mkdir()
continuous-integration/drone/push Build is passing
2023-03-12 15:32:09 +01:00
354ffd033c
VFS: Add a size() method to inodes to implement seeking to the end of a file
continuous-integration/drone/push Build is passing
2023-03-12 14:49:21 +01:00
b54a7f3a80
kernel+libc: Add O_* flags and parse them in open()
...
continuous-integration/drone/push Build is passing
O_RDONLY, O_WRONLY, O_RDWR, O_TRUNC, O_CREAT and O_EXCL are fully implemented.
O_APPEND is partially implemented.
Other flags are not here yet.
2023-03-12 14:43:58 +01:00
bd572473ad
kernel: Remove FileDescriptorTable and add a helper to resolve fds to FileDescriptors
2023-03-12 13:57:38 +01:00
7e655e320a
kernel+libc: Add the lseek() syscall, and fseek, ftell, rewind, fsetpos, and fgetpos
continuous-integration/drone/push Build is passing
2023-03-12 13:15:24 +01:00
292433dc39
kernel+libc: Add the write() system call, and fwrite()
2023-03-12 11:37:41 +01:00
c0a7f6776f
kernel+libc: Add getpid()
continuous-integration/drone/push Build is passing
2023-03-11 22:19:58 +01:00
8fa72f3cf0
kernel+libc: Implement read()
continuous-integration/drone/push Build is passing
2023-03-11 18:02:50 +01:00
810c4bc257
kernel+libc: Start interfacing with the VFS from userspace (open & close)
...
This commit adds open and close syscalls to the kernel, and adds matching wrappers to libc.
No read/write support, so file descriptors are kind of useless for now.
2023-03-11 17:45:20 +01:00
ff468db675
kernel/ELF+Scheduler: Use VFS instead of TarStream
continuous-integration/drone/push Build is passing
2023-03-11 10:34:08 +01:00
c6aa2fe4ad
VFS: Populate the initial filesystem based on the initial ramdisk
2023-03-11 10:23:46 +01:00
ac304073b4
tmpfs: Disallow creating files/folders with already used names
2023-03-11 10:14:42 +01:00
d95ef110c9
vfs: Add support for creating directories given a full path
2023-03-11 01:13:44 +01:00
e5a41d2d52
tmpfs: Implement FileInode read() and write()
2023-03-11 00:52:39 +01:00
6fbf97292a
VFS: Implement resolve_path() using PathParser
...
continuous-integration/drone/push Build is passing
Already works better than old luna (handles .. correctly)
2023-03-10 22:18:48 +01:00
ff770b7328
VFS+TmpFS: Add support for creating subdirectories (mkdir)
continuous-integration/drone/push Build is passing
2023-03-10 21:09:08 +01:00
abdd460525
tmpfs: use adopt_shared_if_nonnull instead of plain adopt_shared in FileSystem::create()
2023-03-07 22:16:52 +01:00
e30eec4213
kernel/x86_64: Avoid kernel panics when a page fault occurs in a userspace thread
2023-03-07 21:08:05 +01:00
ca85a69442
kernel: Save floating-point environment when switching in and out of userspace threads
2023-03-07 20:59:11 +01:00
de38eb6877
luna: Remove pure_cstyle_format
...
continuous-integration/drone/push Build is passing
It was causing a lot of code duplication. If someone doesn't have errors, just return {} from the callback and unwrap the Result.
2023-03-02 13:38:21 +01:00
a595a77421
kernel: Print percentage in splash screen
continuous-integration/drone/push Build is passing
2023-02-27 16:27:59 +01:00
9afff7c544
kernel: Add a fun splash screen during boot :)
...
continuous-integration/drone/push Build is passing
Mostly for fun.
Has a lot of delay in order to see the actual splash screen.
2023-02-27 16:23:51 +01:00
65dd3cd7fb
TmpFS: Use StaticString<128> instead of char[128]
2023-02-27 15:22:39 +01:00
8ba571a30e
TmpFS: Use a fixed char array in DirInode's Entry instead of OwnedStringView
2023-02-27 15:22:39 +01:00
01b6294f76
kernel: Implement creating file inodes in tmpfs directories
2023-02-27 15:22:38 +01:00
a65f4311aa
tmpfs: make the root inode a DirInode instead of a FileInode
2023-02-27 15:22:38 +01:00
dd2f31d8d0
tmpfs: add DirInode skeleton
2023-02-27 15:22:38 +01:00
5fb292bc0e
tmpfs: rename tmpfs::Inode to tmpfs::FileInode
2023-02-27 15:22:37 +01:00
d3bda46325
tmpfs: Make m_next_inode_number atomic
2023-02-27 15:22:37 +01:00
ba9d725481
kernel: Rename FileSystem::root() to root_inode() and add a shortcut for the root filesystem's root inode
2023-02-27 15:22:37 +01:00
3a2b8bcfd7
kernel: Make a factory function for filesystem creation of inodes, and add inode numbers
...
Now every filesystem must provide fs->create_file_inode() for new inodes :)
2023-02-27 15:22:37 +01:00
a49555addc
kernel: Add a subclass of VFS::Inode to make it easier to implement file inodes
2023-02-27 15:22:36 +01:00
9274ad0404
kernel, luna: Move Spinlock.h to luna
2023-02-27 15:22:24 +01:00
c422d11682
kernel: Start working on a VFS implementation using OOP and SharedPtr
2023-02-27 15:22:24 +01:00
71b981175e
InitRD: Use MMU::translate_physical_address instead of allocating VM
...
continuous-integration/drone/push Build is passing
This one is a perfect candidate, since we're just mapping a fixed continuous range of physical memory to virtual memory.
2023-02-27 13:27:21 +01:00
f0a3f99cf9
MemoryManager: Initialize KernelVM at the end of init()
...
KernelVM is not needed for MMU's init process anymore.
2023-02-27 13:24:58 +01:00
519aa347dd
x86_64: Remove recursive mapping related things from MMU.h
continuous-integration/drone/push Build is passing
2023-02-27 13:07:52 +01:00
3ec54fafde
x86_64/MMU: Do not allocate level 1 page tables for huge page entries
...
continuous-integration/drone/pr Build is passing
continuous-integration/drone/push Build is passing
This would leak memory, since we would never end up using them.
2023-02-27 12:55:15 +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
837d483e0b
x86_64/MMU: Copy from the mapped kernel directory instead of the physical version
continuous-integration/drone/pr Build is passing
2023-02-27 12:30:52 +01:00
995d1bc36e
x86_64/MMU: Map all physical memory into the higher half instead of using recursive mapping
...
continuous-integration/drone/pr Build is passing
This still has a few problems. Notably, we are not using huge pages for this mapping, which would be a lot more efficient.
Right now, used memory is 8.1 MiB at boot for a 256MiB system.
But after improving it, this system will be much better than recursive mapping.
fork() will be MUCH easier to implement, for example.
2023-02-27 12:24:21 +01:00
0985b75057
kernel: Add a guard page to the bootstrap stack so that we can catch more stack overflows
continuous-integration/drone/push Build is passing
2023-02-25 17:42:32 +01:00
8352df5ee8
kernel: Enable UBSAN when building in debug mode
continuous-integration/drone/push Build is passing
2023-02-25 17:37:50 +01:00
794567327f
kernel, luna: Port non-VFS changes over from pull request #22
...
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
89958fbc74
kernel: Show a more technical message on failure to remap kernel data sections
continuous-integration/drone/push Build is passing
2023-02-02 21:26:07 +01:00
c05a87c7ff
kernel: Reenable the text console on panic
continuous-integration/drone/push Build is passing
2023-02-01 22:58:31 +01:00
3a84e4998c
kernel/Thread: Add FIXME
continuous-integration/drone/push Build is passing
2023-01-31 17:02:49 +01:00
35501407c1
kernel: Stop shouting when creating threads
continuous-integration/drone/push Build is passing
2023-01-25 21:25:34 +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
635437a4a4
luna: Add a new idiomatic way to mark unused parameters as used while keeping their names
...
Just call ignore(...)
2023-01-25 21:14:44 +01:00
39042cbbd4
kernel: PCI constness updates
continuous-integration/drone/push Build is passing
2023-01-25 21:01:45 +01:00
fa29d6e9b9
kernel: Rename PCI::callback_t to PCI::Callback
continuous-integration/drone/push Build is passing
2023-01-25 20:58:59 +01:00
15c89a3592
kernel: Implement filtered PCI scans
continuous-integration/drone/push Build is passing
2023-01-23 21:24:05 +01:00
3a4ca73df7
kernel: Sync log output
continuous-integration/drone/push Build is passing
2023-01-23 20:42:34 +01:00
6677c643a5
kernel: Start scanning the PCI bus for devices
continuous-integration/drone/push Build is passing
2023-01-23 20:07:17 +01:00
de04c094e7
x86_64: Skip enabling WP for now until I find how to check for its availability
2023-01-23 20:06:45 +01:00
7f8a8cdcaf
kernel, libc: Add an usleep() system call and use that to implement usleep() and sleep() in libc
continuous-integration/drone/push Build is passing
2023-01-22 15:00:20 +01:00
d5b1d72396
x86_64/MMU: Map the kernel page directory to virtual memory
...
This avoids depending on the kernel address space to create a new userspace one,
since there is no physical memory access.
This was fine for a single process, since its address space was created from the kernel one
and no more address spaces were created,
but for two or more, this started to become problematic, since we would create one address space
while being in another process's address space, which has no direct mapping of physical memory.
2023-01-22 14:46:03 +01:00
a7a38d3433
Bitmap: Add a fallible variant of match_region() that does not crash if arguments are out of range
...
continuous-integration/drone/push Build is passing
This lets us call deallocate_memory() with any address and it will not crash.
2023-01-22 14:25:51 +01:00
0126a8fb6e
luna: Add a new SourceLocation class and use that in check() and expect()
2023-01-22 11:43:48 +01:00
944d32de36
Bitmap: Introduce new malloc-aware initialization functions
...
continuous-integration/drone/push Build is passing
Lets us call resize(new_size) instead of initialize(realloc(location, new_size), new_size)
2023-01-21 23:16:50 +01:00
a6974b605e
tools+CMake: Prefix all environment variables with LUNA_
continuous-integration/drone/push Build is passing
2023-01-21 22:44:16 +01:00
a3d0fa7d0a
UserVM: Validate the entire range when freeing multiple VM pages
continuous-integration/drone/push Build is passing
2023-01-16 21:16:38 +01:00
631cdd0204
x86_64/CPU: Skip null instruction pointers on stack trace generation
continuous-integration/drone/push Build is passing
2023-01-16 20:44:45 +01:00
c374c25523
Convert some FIXMEs into NOTES
continuous-integration/drone/push Build is passing
2023-01-16 20:30:35 +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
1b807a4e06
arch/Timer: Make sure ARCH_TIMER_FREQ is a power of two
...
(avoid division and modulo, division is slow)
Fortunately, GCC will optimize divisions by powers of two to simple bitwise shifts :)
2023-01-16 19:43:05 +01:00
5fb2ff09c7
kernel, luna, libc: Move the heap code to a common zone, to be used by both kernel and userspace
2023-01-13 19:27:53 +01:00
139c0b5eb1
Kernel: Make a UserVM wrapper around Bitmap and use that to allocate user VM
...
This lets us allocate more than one page of memory from the user side.
2023-01-13 19:05:20 +01:00
7462b764d8
Kernel: Add __cxa_atexit iomplementation
2023-01-13 18:56:05 +01:00
9454b65682
allocate_memory: Respect PROT_NONE
2023-01-12 17:59:17 +01:00
586ca19b62
Add a VERY BASIC and hacky way of allocating memory from userspace
...
continuous-integration/drone/push Build is passing
Only supports one-page allocations and doesn't have libc wrappers, which means it has to be invoked using syscall().
2023-01-11 23:02:42 +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
d150c55143
TarStream: Support mode
continuous-integration/drone/push Build is passing
2023-01-11 18:42:50 +01:00
82b555cf5c
TarStream: Refactor the API to get rid of that awful method in Result
...
continuous-integration/drone/push Build is passing
That method being try_set_value_with_specific_error()
2023-01-11 17:30:53 +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
...
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
...
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
b0e5d02c9a
kernel: Turn off console logging before starting the init process
continuous-integration/drone/push Build is passing
continuous-integration/drone/pr Build is failing
2023-01-08 15:32:59 +01:00
0c73d69a70
Kernel: Fix shadow 12GiB reserved entry when running QEMU without KVM on
...
continuous-integration/drone/push Build is passing
Fix inspired by: https://github.com/serenityos/serenity/pull/16345
2023-01-07 20:58:12 +01:00
fde1727218
KernelVM: Expand the available VM range
continuous-integration/drone/push Build is passing
2023-01-07 12:33:00 +01:00
8ee634d19b
Kernel/Scheduler: Display addresses starting with 0x when creating threads
continuous-integration/drone/push Build is passing
2023-01-07 12:02:14 +01:00
7e377ef712
Implement printf()
continuous-integration/drone/push Build is passing
2023-01-07 01:49:26 +01:00
29bd8a69fa
MemoryManager: Add helper functions to validate arbitrary ranges of userspace memory
2023-01-07 01:39:33 +01:00
a8a64863c8
kernel, libc: Add clock_gettime()
2023-01-07 00:21:08 +01:00
6e9b4491a6
MemoryManager: Add copy_to_user() and copy_to_user_typed()
2023-01-07 00:17:16 +01:00
e37280b0e5
ELFLoader: Set both the read-write and execute flags if the section has both
...
Not good for W^X, but the compiler decides to squash everything into a single program header :(
2023-01-06 17:34:24 +01:00
87a4bc91d8
arch/x86_64: Nicer display for page faults that shows a human-readable version of the error code
2023-01-06 17:31:22 +01:00
293b979e75
ELFLoader: Do not crash on non-page-aligned sections
2023-01-06 13:30:17 +01:00
fd8a0175d9
Add a syscall infrastructure (our baby program can print to the console now!)
continuous-integration/drone/push Build is passing
2023-01-05 22:39:56 +01:00
caa3fe8c45
MemoryManager: Add validate_userspace_string()
...
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
0ea9974512
First user process!
...
continuous-integration/drone/push Build is passing
Putting it all together, we have a user process that successfully calls sys_exit() w/o crashing.
2023-01-05 21:55:21 +01:00
0aac6c888d
x86_64: Basic exit() syscall!
...
User processes need to do something, amirite?
2023-01-05 21:53:48 +01:00
a33a72915e
Scheduler: Creation, destruction and switching of userspace tasks :))
...
From a TarStream. Not optimal, but OK for the moment.
2023-01-05 21:52:26 +01:00
ea89b92675
Store a bit more stuff in a thread :)
2023-01-05 21:50:53 +01:00
31ea030c7f
MMU: Add functions to create and delete userspace page directories
2023-01-05 21:50:26 +01:00
c53bba0392
MemoryManager: Add an unmap_weak_and_free_vm() helper function
...
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
d3c414af4e
ELFLoader: Do not keep track of segments
...
This reduces calls to kmalloc() since segment data is heap-allocated, and the segments loaded will be deleted when deleting the page directory.
2023-01-05 21:46:03 +01:00
5854e5e530
Add newlines at end-of-file
2023-01-02 13:07:29 +01:00
4081186b27
Heap: Rewrite kmalloc to use Option<HeapBlock*> instead of nullable pointers to iterate over the heap
...
continuous-integration/drone/push Build is passing
At some point, this should be done inside LinkedList itself, but we have no such thing as break in for_each().
It's iterate over everything or nothing.
This also requires operator= in Option, might be also added to Result in the future.
2022-12-30 19:02:25 +01:00
24773fbece
kernel/main: Remove reference to 'extern const BOOTBOOT bootboot'
2022-12-30 18:38:50 +01:00
74aa30a44f
Init: Call efficient_halt() on magic number mismatch instead of busy-looping
2022-12-30 18:36:22 +01:00
9569385691
Remove unused include
2022-12-30 18:32:44 +01:00
7952d1d8a0
x86_64: Add basic keyboard support with an ASYNC DRIVER
continuous-integration/drone/push Build is passing
2022-12-26 19:59:18 +01:00
ed34009b50
Heap: Log more details of blocks
continuous-integration/drone/push Build is passing
2022-12-26 16:17:24 +01:00
1c70ab5a1a
Heap: Avoid combines with blocks outside a range
2022-12-26 15:20:56 +01:00
a1eca479d5
x86_64: Add a getter for the initial page directory
continuous-integration/drone/push Build is passing
2022-12-26 12:57:25 +01:00
2600acc96c
Thread: Add init_regs_user()
2022-12-26 12:46:07 +01:00
7e62ee66be
Change heap.first().has_value() to the cheaper heap.count()
continuous-integration/drone/push Build is passing
2022-12-26 12:24:39 +01:00
73c58bd902
Init: Move platform_init() before MemoryManager::init()
...
continuous-integration/drone/push Build is passing
This enables NX before we actually use it.
Wasn't causing problems with KVM on, but crashed with KVM off with a 'reserved bit set' page fault.
2022-12-26 12:12:55 +01:00
0054777e7d
x86_64: Warn if NX is not supported
2022-12-26 12:11:10 +01:00
08984e1673
x86_64: Create a has_flag() helper function and remove redundant clearing of reserved bits
2022-12-26 12:10:47 +01:00
59d69f684f
x86_64: Add general protection fault handler
continuous-integration/drone/push Build is passing
2022-12-24 11:49:47 +01:00
f2cc797599
Add a simple ELF loader
continuous-integration/drone/push Build is passing
2022-12-23 13:09:21 +01:00
ad0f6546d7
Add a global initrd TarStream to make the initial ramdisk accessible everywhere
...
continuous-integration/drone/push Build is passing
It's also mapped into virtual memory instead of directly going into the physical location!!
2022-12-23 11:33:23 +01:00
6ff92b1714
MemoryManager: Add get_kernel_mapping_for_frames()
...
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
9afaad8fed
Add dbgln() for the luna library
continuous-integration/drone/push Build is passing
2022-12-22 18:00:35 +01:00
a3595e71a9
Update .clang-format
continuous-integration/drone/push Build is passing
2022-12-21 20:22:44 +01:00
fcefab4383
TextConsole: Add wide-character overloads for print() and println()
...
continuous-integration/drone/push Build is passing
These can't fail from UTF-8 decoding errors.
2022-12-21 19:41:13 +01:00
293b7b0f11
TextConsole: Propagate UTF-8 decoding errors
continuous-integration/drone/push Build is passing
2022-12-21 17:38:19 +01:00
2e8ea724a0
arch/x86_64: Refactor the stack tracing code to remove duplicate code
continuous-integration/drone/push Build is passing
2022-12-21 17:21:01 +01:00
e2a6cba3c6
Log: Update formatting to make ANSI weirdness more sensible
continuous-integration/drone/push Build is passing
2022-12-19 21:42:53 +01:00
703c3f44fb
Add two FIXMEs
continuous-integration/drone/push Build is passing
2022-12-19 21:41:27 +01:00
042f999677
Heap: SCRUB IT ALL
...
continuous-integration/drone/push Build is passing
If your memory is all 0xacacacac there is a big probability you haven't initialized it.
2022-12-19 13:20:38 +01:00
a11a5dec1f
DoublyLinkedList -> LinkedList
continuous-integration/drone/push Build is passing
2022-12-19 12:43:23 +01:00
1269a045bd
LinkedList: Add a convenience delayed_for_each() method.
...
This is a special way of iterating over the list which permits removing items while iterating.
2022-12-19 12:41:25 +01:00
5b72144fac
Add a handy consume() method to LinkedList
continuous-integration/drone/push Build is passing
2022-12-19 12:35:08 +01:00
92a7004c2f
Move the reaping logic to Scheduler
2022-12-19 12:24:15 +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
0bdbffe0ca
Spinlock+LockedValue: Add try_lock() methods
...
continuous-integration/drone/push Build is passing
For when you want to lock a resource if possible but not get blocked if it is locked by another thread.
2022-12-18 20:37:26 +01:00
283e641ece
Spinlock+LockedValue: Remove init() functions
...
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
a63146a798
Show the date and time of build :)
continuous-integration/drone/push Build is passing
2022-12-18 18:51:25 +01:00
751377de0a
Scheduler: Make it possible for a thread to stop existing
continuous-integration/drone/push Build is passing
2022-12-18 18:43:34 +01:00
1b92fe36b4
Store the stack inside a thread
2022-12-18 18:43:17 +01:00
6c3b7672a0
Kernel: Demo the initrd using TarStream
...
continuous-integration/drone/push Build is passing
Yes, we're using the physical address. Not optimal, this is only for demo purposes.
2022-12-18 16:39:35 +01:00
ffd3385d0d
TextConsole: decoder -> utf8_decoder
continuous-integration/drone/push Build is passing
2022-12-18 14:42:53 +01:00
36179155e1
Add UTF-8 support to TextConsole!!
...
continuous-integration/drone/push Build is passing
Not much support, since the font only covers codepoints from U+0000 to U+00FF,
(Basic Latin & Latin Extended-A), but unprintable code-points are rendered as ONE box per code-point,
instead of multiple garbage characters.
So it's Unicode-aware, even if it can't print most characters.
2022-12-18 13:09:37 +01:00
a89ae9bed7
Run include-what-you-use
continuous-integration/drone/push Build is passing
2022-12-17 15:51:19 +01:00
1b867151bd
MemoryManager: Run include-what-you-use
continuous-integration/drone/push Build is passing
2022-12-17 15:47:35 +01:00
95b0091622
Split off arch/x86_64/CPU.cpp into various files
continuous-integration/drone/push Build is passing
2022-12-17 15:45:06 +01:00
799a02c883
Remove unnecessary std:: prefix from inside std
continuous-integration/drone/push Build is passing
2022-12-17 15:33:47 +01:00
d5b9ff1569
Remove unused function definition
continuous-integration/drone/push Build is passing
2022-12-17 15:30:57 +01:00
c5220cbf64
LinkedList: Rename append_after to add_after
2022-12-17 15:27:00 +01:00
59c9d8f119
asm -> asm volatile
continuous-integration/drone/push Build is passing
2022-12-17 14:32:24 +01:00
f77126768f
Improve message
2022-12-17 13:48:22 +01:00
abbed13f27
Add a 'pure' variant of cstyle_format which is infallible
...
If we cannot fail to output, it doesn't make sense to propagate errors. So if you're SURE there are no errors, use pure_cstyle_format().
If, however, output can fail, use cstyle_format().
This has a drawback of adding quite a bit of code duplication to Format.cpp.
Some of it is dealt using templates, but some code still remains duplicate.
2022-12-17 12:38:22 +01:00
df9a13cbfb
KernelVM: Make g_used_vm atomic and g_kernelvm_bitmap a LockedValue
continuous-integration/drone/push Build is passing
2022-12-17 10:56:24 +01:00
132963070b
MemoryManager: Make some variables atomic and the frame bitmap a LockedValue
2022-12-17 10:56:24 +01:00
f97515bd7e
Kernel: Add Spinlock and LockedValue<T>
2022-12-17 10:55:54 +01:00
6e5d2b5335
Thread: Make g_next_id atomic
2022-12-17 10:50:49 +01:00
9d6235e109
CPU: Add a pause() method
2022-12-17 10:45:55 +01:00
b316e3b3b7
Print stack trace on assertion fail
continuous-integration/drone/push Build is passing
2022-12-16 20:49:09 +01:00
59765aa334
Rename String.h -> CString.h
...
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
2e24e09146
Convert MemoryMapIterator to Option
continuous-integration/drone/push Build is passing
2022-12-16 19:47:20 +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
814672c771
Remove some redundant error propagation
...
continuous-integration/drone/push Build is passing
Why can printing to the serial port or format onto a string fail?
Even if cstyle_format returns Result<usize>, we shouldn't always follow suit.
2022-12-16 18:32:29 +01:00
41b3c8adb2
Convert to_dynamic_unit to OwnedStringView and rename the old variant to to_dynamic_unit_cstr
continuous-integration/drone/push Build is passing
2022-12-16 18:18:24 +01:00
d759058b80
Introduce std::nothrow
...
Let's make sure we explicitly tell new that we don't want exceptions
2022-12-16 18:14:48 +01:00
da104c87cb
Heap: Return Option in split()
2022-12-08 16:09:12 +01:00
b6173e2b67
LinkedList: Return Option instead of ENONE if no value
2022-12-08 16:09:04 +01:00
6cee208e62
Kernel: Enable -Wsign-conversion
...
continuous-integration/drone/push Build is passing
For real this time, turns out me, being dumb, added it to Luna instead of the kernel.
2022-12-08 15:09:32 +01:00
779fda307a
More scope guards!!
continuous-integration/drone/push Build is passing
2022-12-08 15:01:04 +01:00
1d5d1daa57
Add scope guards
2022-12-08 14:56:11 +01:00
c8302a4fef
Add convenience functions to print the stack trace directly
continuous-integration/drone/push Build is passing
2022-12-07 18:11:24 +01:00
0d437cfcca
Add support for stack traces
continuous-integration/drone/push Build is passing
2022-12-07 17:39:59 +01:00
d93d95f23c
Add sleeping mechanism
2022-12-07 16:11:59 +00:00
757cee4693
Add accessors for when you're sure a linked list is not empty
2022-12-07 16:11:59 +00:00
70497c37fb
Check for runnable threads
2022-12-07 16:11:59 +00:00
57517252d8
Add a state to Thread
2022-12-07 16:11:59 +00:00
f169718a4b
Initialize and demo the scheduler
2022-12-07 16:11:59 +00:00
c907e16311
x86_64: Invoke the scheduler every millisecond
2022-12-07 16:11:59 +00:00
13f5d09cfd
Add a Scheduler!!
2022-12-07 16:11:59 +00:00
12aa014a3d
Add a Thread class which can be part of a DoublyLinkedList
2022-12-07 16:11:59 +00:00
fbd290c01b
KernelVM: clean up a bit
2022-12-07 16:11:59 +00:00
0bbd026660
CPU.h: pragma once
2022-12-07 16:11:59 +00:00
5d988c088f
Make idle_loop noreturn
2022-12-07 16:11:59 +00:00
c657b302c9
Timer: add raw_ticks
2022-12-07 16:11:59 +00:00
fd6a74e61c
CPU: Add an idle_loop method
2022-12-07 16:11:59 +00:00
287c4ab060
Run clang-format
2022-12-07 16:11:59 +00:00
bbfaa4645a
Add a should_invoke_scheduler method
2022-12-07 16:11:59 +00:00
1badc40a4a
Run include-what-you-use everywhere
2022-12-07 11:40:02 +01:00
c2927de191
Remove unused includes
continuous-integration/drone/push Build is passing
2022-12-07 11:22:34 +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
...
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
8598b1e8fc
Replace the _noreturn macro with the C++ native attribute [[noreturn]]
continuous-integration/drone/push Build is passing
2022-12-06 19:40:35 +01:00
c099877c35
Remove unnecessary error propagation in Log.cpp
...
continuous-integration/drone/push Build is passing
Serial and TextConsole always succeed, no need to act as if they could fail
2022-12-06 19:35:34 +01:00
314acbfe21
Change the serial log to display only milliseconds
continuous-integration/drone/push Build is passing
2022-12-06 19:31:41 +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
d48eb85d1d
Heap: Avoid magic numbers
continuous-integration/drone/push Build is passing
2022-12-06 19:05:00 +01:00
09e447d9d2
Heap: Use LinkedList instead of doing things manually
2022-12-06 18:28:04 +01:00
2734353a5d
Heap: Just align it on a 16-byte boundary if it's not aligned
2022-12-06 18:21:19 +01:00
cccf89dd16
Heap: Remove outdated FIXME
2022-12-06 18:20:18 +01:00
a021e7a309
Move make and destroy to luna
continuous-integration/drone/push Build is passing
2022-12-06 16:41:22 +01:00
b338126854
Heap: Use safe_mul in kcalloc()
2022-12-06 15:44:21 +01:00
8ff9cb4b96
x86_64: Add a friendlier handler for page faults
continuous-integration/drone/push Build is passing
2022-12-05 21:02:21 +01:00
1d0dd8fa93
Use KernelVM in kmalloc() and friends
...
Much better now!!
2022-12-05 21:02:05 +01:00
ba758bcef8
Initialize the KernelVM
2022-12-05 21:01:18 +01:00
6c3024d4ee
Heap: Count the heap blocks' size in the size required for an allocation
2022-12-05 21:01:06 +01:00
0edabd6d87
Heap: Add a new block to the end of the linked list
...
*facepalm*
This was causing page faults when having two blocks and the first one (oldest one) being freed first.
2022-12-05 21:00:21 +01:00
d445b29477
Add a virtual memory allocator for the kernel
2022-12-05 20:36:24 +01:00
762131a425
Make more constexpr
2022-12-05 16:43:52 +01:00
2eaa458555
Remove release_value call
2022-12-05 16:41:39 +01:00
1e3706ac01
Make ARCH_PAGE_SIZE and ARCH_TIMER_FREQ known at compile-time
2022-12-05 16:36:41 +01:00
4f183958e3
General constness + [[gnu::packed]] everywhere
2022-12-05 16:13:38 +01:00
a63a8b32b5
Make new and delete noexcept and return nullptr on failure
2022-12-05 13:45:32 +01:00
891320f7d3
Heap: Make const
2022-12-05 13:41:58 +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
ec1354fc8d
const in TextConsole
2022-12-05 13:06:12 +01:00
58ecf11424
Make all refs to the bootboot structure const
2022-12-05 13:04:01 +01:00
54ce511f1d
More const
2022-12-05 13:00:41 +01:00
3b77ba6b04
EVERYTHING IS CONSTANT IN THIS UNIVERSE
...
Here's one advantage of Rust over C++:
Immutability by default. In Rust, you have to mark a variable as mutable, whereas in C++ you have to mark it as immutable.
What's the problem here? Usually, most variables don't need mutability. Thus we end up with const all over the place.
2022-12-05 12:49:01 +01:00
af96db3641
Remove bootboot declaration from MemoryManager now that it's MemoryMapIterator's job to walk the mmap
2022-12-04 15:56:25 +01:00
77e64d74a0
Remove unused header
2022-12-04 15:55:52 +01:00
0a296413e6
It's not worth it aborting when failing to determine CPU name
2022-12-04 15:55:12 +01:00
766804b3a0
Use get_blocks_from_size instead of +1
2022-12-04 15:52:56 +01:00
0d10c98477
SImplify init_physical_frame_allocator() even more
2022-12-04 15:50:21 +01:00
5f6c48bd12
Use a friendlier way of iterating over the memory map
2022-12-04 15:45:13 +01:00
5aa2d1fa18
Add a Bitmap class to provide common functionality and use that in the MemoryManager
2022-12-04 15:14:07 +01:00
ee76bdf84d
Add sanity check
2022-12-04 13:41:14 +01:00
bde3d55eb2
Remove escape from comment
2022-12-04 13:38:48 +01:00
f8120e01c0
Panic in delete as well
2022-12-04 12:58:37 +01:00
22019ac6b2
Print the error instead
2022-12-04 12:57:43 +01:00
96b32f5a93
Please use make<T> and destroy<T> instead of new and delete
...
Those are there only for common stuff (in the Luna library) that needs an environment-agnostic way of allocating memory.
new and delete are standard, thus we should use those.
2022-12-04 12:55:32 +01:00
adb2c2ab41
Add kernel-side new and delete
2022-12-04 12:52:49 +01:00
b8239698db
Add descriptions in CMakeLists
2022-12-04 12:47:08 +01:00
c7ab6bc2d3
Reorganize the luna/ directory so that headers aren't in the top level include path
2022-12-04 12:42:43 +01:00
bed29e71af
Replace some uses of check() with expect()
2022-12-04 12:25:16 +01:00
5d9c50eb12
Make build-debug.sh work
2022-12-04 10:27:25 +01:00
1d7b9260c3
Add config.h for version information
2022-12-03 17:25:25 +01:00
9c9cb6a05a
oopsie
2022-11-30 17:29:18 +01:00
2bc99f2e6e
Make log __attribute__(format), so the compiler can warn us of bad format strings
2022-11-30 17:28:46 +01:00
3f40ccd703
Indicate the log level in the serial console
2022-11-30 17:26:33 +01:00
985d45ddfb
Switch to logging functions everywhere
2022-11-30 17:16:36 +01:00
d2856d8812
Provide meaningful error numbers
2022-11-30 17:13:59 +01:00
29dad5651d
Move __check_failed to Log.cpp so it can be logged across all backends
2022-11-30 17:12:06 +01:00
fe47e0d5cb
Clean init() up
2022-11-30 16:30:42 +01:00
9f5fb547f7
Add logging system :)
2022-11-30 13:29:28 +01:00
f1756e6f58
Add unit formatting
2022-11-30 12:42:11 +01:00
1ed51d11cb
Do not push unused values
2022-11-23 19:37:25 +01:00
82893fa3a4
Introduce a kernel_yield function to use once a scheduler is implemented
2022-11-23 19:34:04 +01:00
7230eceb4d
x86_64/Timer: Show explanatory message on static assertion fail
2022-11-23 18:58:39 +01:00
88f588a0c5
Make ARCH_TIMER_FREQ less frequent so it is more accurate (I hope)
2022-11-23 18:00:09 +01:00
43e26e583c
Calculate the boot timestamp in UNIX time for further usage
2022-11-20 18:30:40 +01:00
ff952fa2e4
Confirm alignment when calculating an offset to split at
2022-11-20 18:04:29 +01:00
35b7194fb7
Move initialization into an init() function returning Result<void> so we can use TRY
...
And remove a lot of testing code as well.
2022-11-20 17:56:07 +01:00
a58b60d0cf
Add a framebuffer text renderer
2022-11-20 17:55:22 +01:00
29defdf54d
Add a debug function to dump heap usage
2022-11-20 16:33:54 +01:00
d54c882c63
Add new/delete-like functions but with Results
2022-11-20 15:48:08 +01:00
caf6d1563c
Kernel: Add a heap memory allocator
...
This is the first time I've actually dropped liballoc in favor of writing my own implementation.
Usually, malloc() and such looked so complicated that I preferred to let a nice external library do the job.
But I've decided to try writing my own allocator, and now we have heap memory without any 3rd party code!
2022-11-20 15:15:26 +01:00
cb88630d86
Bugfix: Make alloc_at return the start of the virtual memory range instead of the end
2022-11-20 15:11:53 +01:00
af267772f0
Rename MemoryManager::map to map_frames_at
...
To make it clearer that this API is only intented for mapping contiguous frames of physical memory (for MMIO perhaps?)
2022-11-19 22:32:48 +01:00
1b41a3e9cf
Introduce a few helpers to allocate/map/unmap several pages, which wrap around the MMU functionality
2022-11-19 22:28:45 +01:00
c886669d56
Break down operations to make protect_kernel_sections() more readable
2022-11-19 22:27:59 +01:00
d96cb73995
Rename physical "pages" to "frames"
...
AFAIK, this is the proper naming scheme. "Pages" are virtual, and "frames" physical.
2022-11-19 22:27:08 +01:00
847f2b4f4c
Replace more usage of stdint.h types with Luna's Types.h
2022-11-19 22:25:03 +01:00
83bcac7a16
Kernel: Introduce a timer interface
2022-11-19 20:01:01 +01:00
047f445651
Kernel: Add helpers to validate memory addresses
2022-11-19 18:38:47 +01:00
424b069d55
Kernel: Start the call stack with a null RBP on x86_64
2022-11-19 18:38:32 +01:00
883a1da0d7
More indentation in CMakeLists.txt
2022-11-19 18:00:45 +01:00
70c6b78e35
Organize source tree
2022-11-19 17:59:49 +01:00
a44e2f41fe
Cleanup kernel/CMakeLists.txt
2022-11-19 17:59:39 +01:00
102eabcb4b
Do some more formatted logging
2022-11-19 17:52:24 +01:00
83e6bd1322
Make the build system more platform-agnostic
2022-11-19 17:46:53 +01:00
8cae20a82c
Move __check_failed out of line so anyone can implement it
2022-11-19 17:20:10 +01:00
b8c136eeb4
Make a common header for attribute shorthands
2022-11-19 17:18:51 +01:00
648bd3fb61
Switch format.h to use Result
2022-11-19 16:13:25 +01:00
31673c0ac9
Introduce format attribute
2022-11-19 15:53:58 +01:00
3cdf224b90
Remove useless files now that functions are out of line
2022-11-19 15:46:46 +01:00
dadc3e570b
Move a few functions out of line
2022-11-19 15:43:09 +01:00
4ebf244d3b
Support printing some integers in output_integer
2022-11-19 13:15:13 +01:00
603ff46d8c
Add a format implementation
2022-11-19 12:30:36 +01:00
762ca844d8
Add CPU::platform_string
2022-11-18 21:04:53 +01:00
109de54822
Provide stubbed handlers for many more x86 exceptions
...
I am now officially a big-boy OS developer, I read the Intel manuals for this!! (Not that the OSDev wiki doesn't have the information, but it was missing descriptions for some more obscure exceptions)
2022-11-18 20:51:25 +01:00
9d318d50aa
Use TRY in MMU.cpp
2022-11-16 20:37:41 +01:00
2c9329928c
Replace page_size (function) with ARCH_PAGE_SIZE (constant)
2022-11-16 20:37:32 +01:00
30ac95bcf8
Use usize/isize instead of (s)size_t
...
Since we're using Rust-style integer types already, why not go all in?
2022-11-16 20:30:34 +01:00
7fc5a6b753
Make kernel rodata and data not executable
2022-11-16 20:02:04 +01:00
7f15ba0ac5
Add some interrupt handling
2022-11-16 17:37:18 +01:00
df8666fd73
Remove unneeded label
2022-11-15 20:47:50 +01:00
bb46cd890b
Add GDT and IDT setup and loading + NX if supported
2022-11-15 20:41:59 +01:00
c9feb11366
Introduce a check() method (like assert() but always on)
2022-11-15 19:36:50 +01:00
c319336e3d
Add a CPU interface
2022-11-15 19:10:32 +01:00
e16324887f
MMU: Properly clear flags
2022-11-15 19:10:19 +01:00
3358454833
Add getters for free, used and reserved memory
2022-11-13 16:56:03 +01:00
6a7097c9ec
Add variables for the future
2022-11-13 16:54:07 +01:00
ae235e5538
MMU: unmap and remap for x86_64
2022-11-13 16:51:21 +01:00
ba1bf72e1b
Remove unused include
2022-11-13 16:32:28 +01:00
d6c56fb512
Mapping finally works!!
2022-11-13 16:31:32 +01:00
4c4f72b865
More MMU stuff, but writing still fails
2022-11-13 15:33:53 +01:00
d148e0aff7
Initialize MemoryManager instead of MMU directly
2022-11-13 14:29:59 +01:00
705c2747de
Add memory manager
2022-11-13 14:29:15 +01:00
6b95307b54
Add init
2022-11-13 12:20:53 +01:00
ffbe5260a5
Add Framebuffer stuff
2022-11-13 11:25:15 +01:00
82c2381ac9
Serial printing!!
2022-11-13 10:30:10 +01:00
cf758fdfdc
Initial commit :)
2022-11-13 10:09:09 +01:00
42efc21110
Start implementing read and write support in tmpfs
...
write seems to work fine, read just hangs there, waiting.
2022-11-12 20:11:26 +01:00
046065c533
Fix tmpfs
2022-11-12 19:05:47 +01:00
3451d50a37
Try building a tmpfs, but weird stuff happens
2022-11-12 18:13:41 +01:00
000ffd1fae
Scheduler: Handle weird cases when the task we're iterating on is null
2022-11-12 18:12:42 +01:00
37bb3273ce
Kernel: Add a C interface to the logging system
2022-11-12 18:12:18 +01:00
511bb7a8c1
Kernel: Make readdir() available in created InitRD directories
2022-11-12 18:11:58 +01:00
fa325072ac
Kernel: Add __cxa_atexit and __cxa_finalize
2022-11-12 17:43:57 +01:00
de2451e553
Kernel: Change up the logging in the kernel's PRNG
2022-11-12 12:56:13 +01:00
11ee01f269
Kernel: Remove "checkpoint logging" in main.cpp
2022-11-12 12:55:47 +01:00
5c51b82f6a
Kernel: Remove obtain_user_ref and add copy_typed_to and from_user
2022-11-12 12:08:26 +01:00
58fb422161
Kernel: Return a Result in MemoryManager and strdup_from_user
2022-11-12 11:56:40 +01:00
662afad426
Kernel: Add a Result class
2022-11-12 11:30:28 +01:00
559d074ce4
Kernel: Make a more convenient wrapper for basename() and dirname()
2022-11-12 10:39:25 +01:00
4aa3bd3107
Next version!
2022-11-09 17:25:05 +01:00
078f3f5862
Kernel: Add a remainder to refactor the initial ramdisk code
2022-11-09 16:07:49 +01:00
d76af10e70
Kernel: Move initrd into the fs/ folder
...
It makes more sense to put it in there.
2022-11-09 16:03:16 +01:00
60bd8d9418
Kernel: Add an explanatory comment to the end of _start()
2022-11-09 15:58:00 +01:00
1ea216dfd1
Kernel: Rename assert.h to ensure.h
...
The macro is named "ensure", the header file should reflect that.
2022-11-09 15:28:35 +01:00
da7ad8da5b
Kernel: Show the file location when a check fails
2022-11-09 15:23:59 +01:00
ea94b331fb
Scheduler: Use copy_to_user in a few system calls
2022-11-09 15:20:53 +01:00
accf7ee417
libc: Add unimplemented st_nlink field
2022-11-09 11:36:21 +01:00
033c41cbd7
Kernel: Rework the uid/gid system to make it compliant
2022-11-09 09:54:07 +01:00
98da473fdc
Run clang-format
2022-11-08 19:07:43 +01:00
054d5a8bb4
Build system: Prettify build
2022-11-08 18:03:43 +01:00
6f72f92493
Kernel: Start preparing for recursive paging
2022-11-08 17:12:59 +01:00
5d94525c7a
Kernel: Figure out why a program is misbehaving
2022-11-06 18:12:25 +01:00
44815b08c7
Kernel: Use copy_from_user() and copy_to_user() in read/write
...
This is huge. Finally, we can do proper reads/writes with invalid addresses, or big buffers.
2022-11-06 15:19:23 +01:00
