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Kernel: Start working on TLS, add SYS_{SET,GET}_TLS

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Bananymous
2025-04-15 23:16:20 +03:00
parent 254fd80088
commit 4bcd3ed86f
11 changed files with 60 additions and 3 deletions
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8
kernel/include/kernel/GDT.h
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@@ -128,6 +128,10 @@ namespace Kernel
#endif
}
#if ARCH(i686)
void set_tls(uintptr_t addr);
#endif
private:
GDT() = default;
@@ -149,8 +153,8 @@ namespace Kernel
BAN::Array<SegmentDescriptor, 7> m_gdt; // null, kernel code, kernel data, user code, user data, tss low, tss high
static constexpr uint16_t m_tss_offset = 0x28;
#elif ARCH(i686)
BAN::Array<SegmentDescriptor, 7> m_gdt; // null, kernel code, kernel data, user code, user data, processor data, tss
static constexpr uint16_t m_tss_offset = 0x30;
BAN::Array<SegmentDescriptor, 8> m_gdt; // null, kernel code, kernel data, user code, user data, processor data, tls, tss
static constexpr uint16_t m_tss_offset = 0x38;
#endif
TaskStateSegment m_tss;
const GDTR m_gdtr {

2
kernel/include/kernel/Process.h
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@@ -174,6 +174,8 @@ namespace Kernel
BAN::ErrorOr<long> sys_sigprocmask(int how, const sigset_t* set, sigset_t* oset);
BAN::ErrorOr<long> sys_yield();
BAN::ErrorOr<long> sys_set_tls(void*);
BAN::ErrorOr<long> sys_get_tls();
BAN::ErrorOr<long> sys_pthread_create(const pthread_attr_t* attr, void (*entry)(void*), void* arg);
BAN::ErrorOr<long> sys_pthread_exit(void* value);
BAN::ErrorOr<long> sys_pthread_join(pthread_t thread, void** value);

2
kernel/include/kernel/Processor.h
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@@ -110,6 +110,8 @@ namespace Kernel
static void send_smp_message(ProcessorID, const SMPMessage&, bool send_ipi = true);
static void broadcast_smp_message(const SMPMessage&);
static void load_tls();
private:
Processor() = default;
~Processor() { ASSERT_NOT_REACHED(); }

5
kernel/include/kernel/Thread.h
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@@ -88,6 +88,9 @@ namespace Kernel
bool is_userspace() const { return m_is_userspace; }
void set_tls(vaddr_t tls) { m_tls = tls; }
vaddr_t get_tls() const { return m_tls; }
size_t virtual_page_count() const { return (m_kernel_stack ? (m_kernel_stack->size() / PAGE_SIZE) : 0) + (m_userspace_stack ? (m_userspace_stack->size() / PAGE_SIZE) : 0); }
size_t physical_page_count() const { return virtual_page_count(); }
@@ -121,6 +124,8 @@ namespace Kernel
bool m_is_userspace { false };
bool m_delete_process { false };
vaddr_t m_tls { 0 };
SchedulerQueue::Node* m_scheduler_node { nullptr };
InterruptStack m_interrupt_stack { };