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Kernel: Allow passing a thread argument for new kernel threads

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This adds the ability to pass a pointer to kernel thread/process.
Also add the ability to use a closure as thread function, which
allows passing information to a kernel thread more easily.
This commit is contained in:
Tom 2020-11-16 20:51:34 -07:00 • committed by Andreas Kling
parent 6cb640eeba
commit 6a620562cc
11 changed files with 68 additions and 24 deletions
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8
Kernel/Process.cpp
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@ -311,10 +311,11 @@ RefPtr<Process> Process::create_user_process(RefPtr<Thread>& first_thread, const
return process;
}
NonnullRefPtr<Process> Process::create_kernel_process(RefPtr<Thread>& first_thread, String&& name, void (*e)(), u32 affinity)
NonnullRefPtr<Process> Process::create_kernel_process(RefPtr<Thread>& first_thread, String&& name, void (*entry)(void*), void *entry_data, u32 affinity)
{
auto process = adopt(*new Process(first_thread, move(name), (uid_t)0, (gid_t)0, ProcessID(0), true));
first_thread->tss().eip = (FlatPtr)e;
first_thread->tss().eip = (FlatPtr)entry;
first_thread->tss().esp = FlatPtr(entry_data); // entry function argument is expected to be in tss.esp
if (process->pid() != 0) {
ScopedSpinLock lock(g_processes_lock);
@ -765,7 +766,7 @@ KResult Process::send_signal(u8 signal, Process* sender)
return KResult(-ESRCH);
}
RefPtr<Thread> Process::create_kernel_thread(void (*entry)(), u32 priority, const String& name, u32 affinity, bool joinable)
RefPtr<Thread> Process::create_kernel_thread(void (*entry)(void*), void* entry_data, u32 priority, const String& name, u32 affinity, bool joinable)
{
ASSERT((priority >= THREAD_PRIORITY_MIN) && (priority <= THREAD_PRIORITY_MAX));
@ -781,6 +782,7 @@ RefPtr<Thread> Process::create_kernel_thread(void (*entry)(), u32 priority, cons
auto& tss = thread->tss();
tss.eip = (FlatPtr)entry;
tss.esp = FlatPtr(entry_data); // entry function argument is expected to be in tss.esp
ScopedSpinLock lock(g_scheduler_lock);
thread->set_state(Thread::State::Runnable);