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Kernel/LibC: Add basic support for pthread_{create,exit}

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Bananymous
2025-04-01 23:08:27 +03:00
parent 788f5429e1
commit c1618e2b5d
9 changed files with 178 additions and 10 deletions
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46
kernel/kernel/Thread.cpp
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@@ -117,8 +117,6 @@ namespace Kernel
true
));
thread->setup_exec();
thread_deleter.disable();
return thread;
@@ -166,6 +164,21 @@ namespace Kernel
}
}
BAN::ErrorOr<Thread*> Thread::pthread_create(entry_t entry, void* arg)
{
auto* thread = TRY(create_userspace(m_process, m_process->page_table()));
memcpy(thread->m_sse_storage, m_sse_storage, sizeof(m_sse_storage));
thread->setup_exec_impl(
reinterpret_cast<uintptr_t>(entry),
reinterpret_cast<uintptr_t>(arg),
0, 0, 0
);
return thread;
}
BAN::ErrorOr<Thread*> Thread::clone(Process* new_process, uintptr_t sp, uintptr_t ip)
{
ASSERT(m_is_userspace);
@@ -189,6 +202,8 @@ namespace Kernel
thread->m_interrupt_stack.sp = sp;
thread->m_interrupt_stack.ss = 0x10;
memcpy(thread->m_sse_storage, m_sse_storage, sizeof(m_sse_storage));
#if ARCH(x86_64)
thread->m_interrupt_registers.rax = 0;
#elif ARCH(i686)
@@ -201,23 +216,34 @@ namespace Kernel
}
void Thread::setup_exec()
{
const auto& userspace_info = process().userspace_info();
ASSERT(userspace_info.entry);
setup_exec_impl(
userspace_info.entry,
userspace_info.argc,
reinterpret_cast<uintptr_t>(userspace_info.argv),
reinterpret_cast<uintptr_t>(userspace_info.envp),
userspace_info.file_fd
);
}
void Thread::setup_exec_impl(uintptr_t entry, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3)
{
ASSERT(is_userspace());
m_state = State::NotStarted;
// Signal mask is inherited
const auto& userspace_info = process().userspace_info();
ASSERT(userspace_info.entry);
// Initialize stack for returning
PageTable::with_fast_page(process().page_table().physical_address_of(kernel_stack_top() - PAGE_SIZE), [&] {
uintptr_t sp = PageTable::fast_page() + PAGE_SIZE;
write_to_stack(sp, userspace_info.entry);
write_to_stack(sp, userspace_info.file_fd);
write_to_stack(sp, userspace_info.envp);
write_to_stack(sp, userspace_info.argv);
write_to_stack(sp, userspace_info.argc);
write_to_stack(sp, entry);
write_to_stack(sp, arg3);
write_to_stack(sp, arg2);
write_to_stack(sp, arg1);
write_to_stack(sp, arg0);
});
m_interrupt_stack.ip = reinterpret_cast<vaddr_t>(start_userspace_thread);