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Kernel: Remove kernel processes

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Kernel can just use raw threads, pretty muchs the only thing that
process provides is syscalls which kernel threads of course don't
need.

Also this makes init process have pid 1 :D
This commit is contained in:
Bananymous
2025-07-01 20:05:43 +03:00
parent 892e16dfb1
commit 8a0269d29e
23 changed files with 64 additions and 85 deletions
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6
kernel/include/kernel/Networking/ARPTable.h
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@@ -4,7 +4,7 @@
#include <BAN/HashMap.h>
#include <BAN/UniqPtr.h>
#include <kernel/Networking/NetworkInterface.h>
#include <kernel/Process.h>
#include <kernel/Thread.h>
#include <kernel/ThreadBlocker.h>
namespace Kernel
@@ -56,9 +56,9 @@ namespace Kernel
BAN::HashMap<BAN::IPv4Address, BAN::MACAddress> m_arp_table;
Process* m_process = nullptr;
Thread* m_thread { nullptr };
BAN::CircularQueue<PendingArpPacket, 128> m_pending_packets;
ThreadBlocker m_pending_thread_blocker;
ThreadBlocker m_pending_thread_blocker;
friend class BAN::UniqPtr<ARPTable>;
};

4
kernel/include/kernel/Networking/IPv4Layer.h
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@@ -11,7 +11,7 @@
#include <kernel/Networking/NetworkInterface.h>
#include <kernel/Networking/NetworkLayer.h>
#include <kernel/Networking/NetworkSocket.h>
#include <kernel/Process.h>
#include <kernel/Thread.h>
namespace Kernel
{
@@ -72,7 +72,7 @@ namespace Kernel
RecursiveSpinLock m_bound_socket_lock;
BAN::UniqPtr<ARPTable> m_arp_table;
Process* m_process { nullptr };
Thread* m_thread { nullptr };
static constexpr size_t pending_packet_buffer_size = 128 * PAGE_SIZE;
BAN::UniqPtr<VirtualRange> m_pending_packet_buffer;

4
kernel/include/kernel/Networking/TCPSocket.h
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@@ -6,7 +6,7 @@
#include <kernel/Memory/VirtualRange.h>
#include <kernel/Networking/NetworkInterface.h>
#include <kernel/Networking/NetworkSocket.h>
#include <kernel/Process.h>
#include <kernel/Thread.h>
#include <kernel/ThreadBlocker.h>
namespace Kernel
@@ -162,7 +162,7 @@ namespace Kernel
State m_next_state { State::Closed };
uint8_t m_next_flags { 0 };
Process* m_process { nullptr };
Thread* m_thread { nullptr };
uint64_t m_time_wait_start_ms { 0 };

6
kernel/include/kernel/Process.h
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@@ -39,8 +39,6 @@ namespace Kernel
using entry_t = Thread::entry_t;
public:
static Process* create_kernel();
static Process* create_kernel(entry_t, void*);
static BAN::ErrorOr<Process*> create_userspace(const Credentials&, BAN::StringView path, BAN::Span<BAN::StringView> arguments);
~Process();
void cleanup_function(Thread*);
@@ -217,8 +215,6 @@ namespace Kernel
size_t proc_cmdline(off_t offset, BAN::ByteSpan) const;
size_t proc_environ(off_t offset, BAN::ByteSpan) const;
bool is_userspace() const { return m_is_userspace; }
// Returns error if page could not be allocated
// Returns true if the page was allocated successfully
// Return false if access was page violation (segfault)
@@ -331,8 +327,6 @@ namespace Kernel
BAN::Vector<BAN::String> m_cmdline;
BAN::Vector<BAN::String> m_environ;
bool m_is_userspace { false };
BAN::Vector<ChildExitStatus> m_child_exit_statuses;
ThreadBlocker m_child_exit_blocker;

2
kernel/include/kernel/Thread.h
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@@ -36,7 +36,7 @@ namespace Kernel
static constexpr size_t userspace_stack_size { PAGE_SIZE * 128 };
public:
static BAN::ErrorOr<Thread*> create_kernel(entry_t, void*, Process*);
static BAN::ErrorOr<Thread*> create_kernel(entry_t, void*);
static BAN::ErrorOr<Thread*> create_userspace(Process*, PageTable&);
~Thread();

2
kernel/include/kernel/USB/Hub/HubDriver.h
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@@ -34,7 +34,7 @@ namespace Kernel
BAN::Atomic<uint32_t> m_changed_ports { 0 };
ThreadBlocker m_changed_port_blocker;
BAN::Atomic<Process*> m_port_updater { nullptr };
BAN::Atomic<Thread*> m_port_updater { nullptr };
struct PortInfo
{

2
kernel/include/kernel/USB/XHCI/Controller.h
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@@ -73,7 +73,7 @@ namespace Kernel
Mutex m_mutex;
BAN::Atomic<Process*> m_port_updater { nullptr };
BAN::Atomic<Thread*> m_port_updater { nullptr };
ThreadBlocker m_port_thread_blocker;
BAN::Atomic<bool> m_port_changed { false };