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26757 commits 1 branch 0 tags 230 MiB
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392 commits

Author SHA1 Message Date
Gunnar Beutner
50839bd1f1 Kernel: Properly initialize r8-r15 for new threads on x86_64 2021-06-30 15:13:30 +02:00
Liav A
92c0dab5ab Kernel: Introduce the new SysFS 
The intention is to add dynamic mechanism for notifying the userspace
about hotplug events. Currently, the DMI (SMBIOS) blobs and ACPI tables
are exposed in the new filesystem.
 2021-06-29 20:53:59 +02:00
Gunnar Beutner
0b82c583e0 Kernel: Implement capturing stack traces on x86_64 2021-06-29 20:03:36 +02:00
Gunnar Beutner
36ce2a2b76 Kernel: Fix struct layout for interrupt entries 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
e979a88af4 Kernel: Implement do_assume_context for execve() on x86_64 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
rileylyman
640db93bdd Kernel: Fix small typo in inline comment 2021-06-28 16:39:25 +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
076692b1ef Kernel: Implement entry code for x86_64 interrupts 
With this fixed we can now properly handle interrupts (e.g. timer
interrupts) on x86_64.
 2021-06-28 15:55:00 +02:00
Gunnar Beutner
328d44e227 Kernel: Fix stack for new threads on x86_64 
Unlike on x86 iretq always pops rsp and ss.
 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
79ab9cce18 Kernel: Clear segment registers on x86_64 
They're supposedly unused but iretq doesn't like ss being non-zero.
 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
10ca7f18a7 Kernel: Fix declaration for struct TrapFrame 
This is declared as a struct elsewhere.
 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
9077c64d37 Kernel: Correct spelling mistake 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
4c555684b7 Kernel: Set an appropriate GDT for 64-bit mode 2021-06-25 15:19:09 +02:00
Gunnar Beutner
d84abe51f5 Kernel: Use PML4T for 64-bit mode 2021-06-25 15:19:09 +02:00
Gunnar Beutner
13e4093da4 Kernel: Move Multiboot header into a separate file 2021-06-25 15:19:09 +02:00
Gunnar Beutner
19c0498ccc Kernel: Update the x86_64 boot code to match i386's code 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
553ea3036d Kernel: Remove PAGE_SIZE from CPU.h 
We have that information in LibC, lets use that instead
 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
Gunnar Beutner
c980a51776 Kernel: Make sure the kernel's ELF PHDRs don't use rwx 
This doesn't really matter in terms of writability for the kernel text
because we set up proper page mappings anyway which prohibit writing
to the text segment. However, this makes the profiler happy which
previously died when validating the kernel's ELF program headers.
 2021-06-19 12:54:33 +02:00
Jean-Baptiste Boric
8cd96f031d Kernel: Fix CPUID usage inside cpu_detect() 
Since no features inside the 0x80000001 leaf are required for
SerenityOS to work, don't assert if it's unavailable.
 2021-06-18 01:02:25 +02:00
Jean-Baptiste Boric
fb3447f7ec Kernel: Use FXSR feature only if supported by CPU 
If FXSR is not present, fall back to fnsave and frstor instructions.
These instructions aren't available on the canonical i686 CPU which is
the Pentium Pro processor.
 2021-06-18 01:02:25 +02:00
Jean-Baptiste Boric
fea23d0ec1 Kernel: Detect support for CPUID FXSR 
The fxsave and fxrstor instructions are available only if the FXSR
feature is present.
 2021-06-18 01:02:25 +02:00
Gunnar Beutner
da24228348 Kernel: Print stack traces for crashes in release builds 
Previously we'd just reset the CPU and reboot.
 2021-06-11 11:32:01 +02:00
Gunnar Beutner
bcf6da8cde Kernel: Enable VERIFY() checks even if the DEBUG macro is not defined 
Fixes #7910.
 2021-06-11 11:32:01 +02:00
Gunnar Beutner
4fca9ee060 Kernel: Allow building the kernel with -O0 
Unfortunately the kernel doesn't run with -O0 but at least it can be
successfully built with this change.
 2021-05-28 19:52:22 +01:00
Liav A
b8f0a9c974 Kernel/CPU: Fix awkward printing early on boot 
This usage of the word "installing" seemed for me for a long time as
a wrong thing, so let's make it better now.
 2021-05-21 22:38:26 +01:00
Gunnar Beutner
8495d6aeca Kernel: Use the Function class for smp_broadcast()/smp_unicast() 
This avoids allocations for smp_broadcast() and smp_unicast() by
using the Function class.
 2021-05-20 09:09:10 +02:00
Gunnar Beutner
cac7a8ced9 Kernel: Use the Function class for deferred_call_queue() 
This avoids allocations for deferred_call_queue().
 2021-05-20 09:09:10 +02:00
Brian Gianforcaro
7540f4268b Kernel: Remove s_processor_lock by making s_processors statically sized 
Currently in SMP mode we hard code support for up to only 8 processors.
There is no reason for this to be a dynamic allocation that needs to be
guarded by a spinlock. Instead use a Array<T* with inline storage of 8,
allowing each processor to initialize it self in place, avoiding all
the need for locks.
 2021-05-20 08:10:07 +02:00
Brian Gianforcaro
83fc591cea Kernel: Generate page fault events from the kernel profiler 
Hook the kernel page fault handler and capture page fault events when
the fault has a current thread attached in TLS. We capture the eip and
ebp so we can unwind the stack and locate which pieces of code are
generating the most page faults.

Co-authored-by: Gunnar Beutner <gbeutner@serenityos.org>
 2021-05-19 22:51:42 +02:00