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26887 commits 1 branch 0 tags 230 MiB
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93 commits

Author SHA1 Message Date
Jean-Baptiste Boric
528574d958 Kernel: Detect and display CPUID Hyper-V data 2021-07-14 13:52:34 +02:00
Jean-Baptiste Boric
b22357b17b Kernel: Detect and display CPUID hypervisor signature 2021-07-14 13:52:34 +02:00
Jean-Baptiste Boric
4cc346fb19 Kernel: Add support for hypervisor CPUID feature 2021-07-14 13:52:34 +02:00
Daniel Bertalan
ef40de9c6c Kernel: Don't mix AT&T and Intel ASM syntax in boot.S 
The rest of the file is in AT&T syntax, so for the time being, I'll
switch these instructions to AT&T too to make Clang shut up.
 2021-07-14 13:12:25 +02:00
Brian Gianforcaro
da665077ce Kernel: Remove unused header includes in Arch subtree 2021-07-11 21:37:38 +02:00
Luke
c94b0e80e7 Kernel: Stop booting and print if PAE is not supported by the processor 
We currently require PAE and not having it causes us to crash.
This turns that crash into an error message.
 2021-07-09 01:29:52 +02:00
Tom
87dc4c3d2c Kernel: Move PhysicalPage classes out of the heap into an array 
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.
 2021-07-08 11:43:34 +02:00
Liav A
cc98871383 Kernel: Print if image has become too large again 
Instead of just disabling interrupts and halting when entering the C++
section, just halt with a printed message indicating the error.
 2021-07-07 22:18:36 +02:00
Liav A
8e8a5680d5 Kernel/x86_64: Print if machine doesn't support x86_64 mode 
We drop to real mode and use two BIOS calls to do this.
 2021-07-06 19:01:27 +02:00
Gunnar Beutner
8aafbd917a Kernel: Fix incorrect indentation 
Looks like a tab and some other things snuck in. :)
 2021-07-05 17:12:56 +02:00
Hendiadyoin1
9b7e48c6bd Kernel: Replace raw asm functions with naked ones 2021-07-05 16:40:00 +02:00
Gunnar Beutner
8c14488106 Kernel: Get rid of of some of the duplicate kernel base address macros 2021-07-05 12:28:45 +02:00
Gunnar Beutner
040fe0054b Kernel: Merge the x86 and x86_64 boot code into a single file 
They're mostly the same apart from some x86_64-specific parts.
 2021-07-05 12:28:45 +02:00
Tom
dce18958b6 Kernel: Fix safe_memset not setting the last few bytes in some cases 
Because the remainder variable will always be 0 unless a fault happened
we should not use it to decide if we have nothing left to memset when
finishing the fast path. This caused not all bytes to be zeroed
if the size was not an exact multiple of sizeof(size_t).

Fixes #8352
 2021-07-04 18:54:16 +02:00
Gunnar Beutner
c51b49a8cb Kernel: Implement TLS support for x86_64 2021-07-04 01:07:28 +02:00
Gunnar Beutner
04a912f68f Kernel: Hide the implementation detail that MSRs use two registers 
When retrieving and setting x86 MSRs two registers are required. The
existing setter and getter for the MSR class made this implementation
detail visible to the caller. This changes the setter and getter to
use u64 instead.
 2021-07-04 01:07:28 +02:00
Gunnar Beutner
52f9aaa823 Kernel: Use the GS segment for the per-CPU struct 
Right now we're using the FS segment for our per-CPU struct. On x86_64
there's an instruction to switch between a kernel and usermode GS
segment (swapgs) which we could use.

This patch doesn't update the rest of the code to use swapgs but it
prepares for that by using the GS segment instead of the FS segment.
 2021-07-02 23:33:17 +02:00
Gunnar Beutner
5666809889 Kernel: Fix building the kernel with LTO 
Fixes #8383.
 2021-07-02 17:51:26 +02:00
Gunnar Beutner
e37576440d Kernel: Fix stack alignment on x86_64 
These were already properly aligned (as far as I can tell).
 2021-06-30 15:13:30 +02:00
Gunnar Beutner
0b82c583e0 Kernel: Implement capturing stack traces on x86_64 2021-06-29 20:03:36 +02:00
Gunnar Beutner
df9e73de25 Kernel: Add x86_64 support for fork() 2021-06-29 20:03:36 +02:00
Gunnar Beutner
732dc72c58 Kernel: Fix the limit for the IDT table 2021-06-28 22:29:28 +02:00
Gunnar Beutner
a8587fbfb9 Kernel: Use FlatPtr for register-sized values 2021-06-28 22:29:28 +02:00
Gunnar Beutner
b5aad1c81d Kernel: Fix GDT and segment selectors to make userland work on x86_64 
Userland faulted on the very first instruction before because the
PML4T/PDPT/etc. weren't marked as user-accessible. For some reason
x86 doesn't care about that.

Also, we need to provide an appropriate userspace stack segment
selector to iretq.
 2021-06-28 22:29:28 +02:00
Gunnar Beutner
e56a0d6af7 Kernel: Fix memset() on x86_64 
Previously memset() only set half of the bytes to the requested value.
 2021-06-28 15:55:00 +02:00
Gunnar Beutner
32840dfa17 Kernel: Implement more x86_64 context switching functionality 2021-06-28 15:55:00 +02:00
Gunnar Beutner
9ed051fe25 Kernel: Implement initializing threads on x86_64 2021-06-27 15:46:42 +02:00
Gunnar Beutner
f285241cb8 Kernel: Rename Thread::tss to Thread::regs and add x86_64 support 
We're using software context switches so calling this struct tss is
somewhat misleading.
 2021-06-27 15:46:42 +02:00
Gunnar Beutner
eba33f82b8 Kernel: Reorder code a bit to clarify which #if block it belongs to 2021-06-27 15:46:42 +02:00
Gunnar Beutner
df530941cc Kernel: Implement safe_* memory access functions for x86_64 2021-06-27 15:46:42 +02:00
Gunnar Beutner
9d9f20391d Kernel: Use macros for GDT indices instead of hardcoding the values 2021-06-27 15:46:42 +02:00
Gunnar Beutner
065c6c307d Kernel: Add support for interrupts on x86_64 2021-06-27 15:46:42 +02:00
Gunnar Beutner
233ef26e4d Kernel+Userland: Add x86_64 registers to RegisterState/PtraceRegisters 2021-06-27 15:46:42 +02:00
Gunnar Beutner
324f72d02b Kernel: Fix incorrect flags for the GDT entries 
The Sz (protected mode) bit should not be set for 64-bit GDT entries.
 2021-06-27 15:46:42 +02:00
Gunnar Beutner
389bf82889 Kernel: Add CPUID flag for long mode 
This isn't particularly useful because by the time we've entered
init() the CPU had better support x86_64 anyway. However this shows the
CPU flag in System Monitor - even in 32-bit mode.
 2021-06-26 11:08:52 +02:00
Gunnar Beutner
e52051903b Kernel: Fix off-by-one error in Processor::write_raw_gdt_entry 2021-06-26 11:08:52 +02:00
Gunnar Beutner
f630299d49 Kernel: Add support for setting up a x86_64 GDT once in C++ land 2021-06-26 11:08:52 +02:00
Gunnar Beutner
29d9666e02 Kernel: Fix GDT limits 
The GDT limits are inclusive, so for correctness we should subtract
one from the structs' size.
 2021-06-26 11:08:52 +02:00
Gunnar Beutner
13e4093da4 Kernel: Move Multiboot header into a separate file 2021-06-25 15:19:09 +02:00
Daniel Bertalan
74535628a8 Kernel: Use proper Atomic<T> types in CPU 
This is needed because Clang's intrinsic atomic functions behave weirdly
if only one of their pointer arguments is volatile.
 2021-06-24 17:35:49 +04:30
Gunnar Beutner
38fca26f54 Kernel: Add stubs for missing x86_64 functionality 
This adds just enough stubs to make the kernel compile on x86_64. Obviously
it won't do anything useful - in fact it won't even attempt to boot because
Multiboot doesn't support ELF64 binaries - but it gets those compiler errors
out of the way so more progress can be made getting all the missing
functionality in place.
 2021-06-24 09:27:13 +02:00
Hendiadyoin1
62f9377656 Kernel: Move special sections into Sections.h 
This also removes a lot of CPU.h includes infavor for Sections.h
 2021-06-24 00:38:23 +02:00
Hendiadyoin1
7ca3d413f7 Kernel: Pull apart CPU.h 
This does not add any functional changes
 2021-06-24 00:38:23 +02:00