03adaa356c
kernel: Avoid printing keypresses twice
2023-03-23 21:33:50 +01:00
d33fccc66f
kernel: Implement reading from /dev/console
2023-03-19 19:15:19 +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
8c72e9a49a
kernel: Add an exec() system call
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continuous-integration/drone/push Build is passing
Doesn't support arguments or environment for now.
2023-03-16 22:44:58 +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
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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
519aa347dd
x86_64: Remove recursive mapping related things from MMU.h
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2023-02-27 13:07:52 +01:00
3ec54fafde
x86_64/MMU: Do not allocate level 1 page tables for huge page entries
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continuous-integration/drone/pr Build is passing
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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
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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
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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
794567327f
kernel, luna: Port non-VFS changes over from pull request #22
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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
635437a4a4
luna: Add a new idiomatic way to mark unused parameters as used while keeping their names
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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
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2023-01-25 20:58:59 +01:00
15c89a3592
kernel: Implement filtered PCI scans
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2023-01-23 21:24:05 +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
d5b1d72396
x86_64/MMU: Map the kernel page directory to virtual memory
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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
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
1b807a4e06
arch/Timer: Make sure ARCH_TIMER_FREQ is a power of two
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(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
84c82a4e75
luna, kernel: More constness
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2023-01-10 19:31:41 +01:00
a8a64863c8
kernel, libc: Add clock_gettime()
2023-01-07 00:21:08 +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
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
0aac6c888d
x86_64: Basic exit() syscall!
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User processes need to do something, amirite?
2023-01-05 21:53:48 +01:00
31ea030c7f
MMU: Add functions to create and delete userspace page directories
2023-01-05 21:50:26 +01:00
5854e5e530
Add newlines at end-of-file
2023-01-02 13:07:29 +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
a1eca479d5
x86_64: Add a getter for the initial page directory
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2022-12-26 12:57:25 +01:00
2600acc96c
Thread: Add init_regs_user()
2022-12-26 12:46:07 +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
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2022-12-24 11:49:47 +01:00
a3595e71a9
Update .clang-format
continuous-integration/drone/push Build is passing
2022-12-21 20:22:44 +01:00
2e8ea724a0
arch/x86_64: Refactor the stack tracing code to remove duplicate code
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2022-12-21 17:21:01 +01:00
a89ae9bed7
Run include-what-you-use
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2022-12-17 15:51:19 +01:00
95b0091622
Split off arch/x86_64/CPU.cpp into various files
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2022-12-17 15:45:06 +01:00
59c9d8f119
asm -> asm volatile
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2022-12-17 14:32:24 +01:00
abbed13f27
Add a 'pure' variant of cstyle_format which is infallible
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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
9d6235e109
CPU: Add a pause() method
2022-12-17 10:45:55 +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
814672c771
Remove some redundant error propagation
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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
6cee208e62
Kernel: Enable -Wsign-conversion
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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
c8302a4fef
Add convenience functions to print the stack trace directly
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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
57517252d8
Add a state to Thread
2022-12-07 16:11:59 +00:00
c907e16311
x86_64: Invoke the scheduler every millisecond
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
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
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
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
58ecf11424
Make all refs to the bootboot structure const
2022-12-05 13:04:01 +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
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
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
d96cb73995
Rename physical "pages" to "frames"
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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
424b069d55
Kernel: Start the call stack with a null RBP on x86_64
2022-11-19 18:38:32 +01:00
70c6b78e35
Organize source tree
2022-11-19 17:59:49 +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
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
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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
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Since we're using Rust-style integer types already, why not go all in?
2022-11-16 20:30:34 +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
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
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
