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Kernel+LibC: Add a simple create_thread() syscall.

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It takes two parameters, a function pointer for the entry function,
and a void* argument to be passed to that function on the new thread.
This commit is contained in:
Andreas Kling 2019-03-23 22:59:08 +01:00
parent 7f1757b16c
commit e561ab1b0b
10 changed files with 45 additions and 5 deletions
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15
Kernel/Thread.cpp
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@ -435,7 +435,7 @@ void Thread::push_value_on_stack(dword value)
*stack_ptr = value;
}
void Thread::make_userspace_stack(Vector<String> arguments, Vector<String> environment)
void Thread::make_userspace_stack_for_main_thread(Vector<String> arguments, Vector<String> environment)
{
auto* region = m_process.allocate_region(LinearAddress(), default_userspace_stack_size, "stack");
ASSERT(region);
@ -482,12 +482,23 @@ void Thread::make_userspace_stack(Vector<String> arguments, Vector<String> envir
push_value_on_stack(0);
}
void Thread::make_userspace_stack_for_secondary_thread(void *argument)
{
auto* region = m_process.allocate_region(LinearAddress(), default_userspace_stack_size, String::format("Thread %u Stack", tid()));
ASSERT(region);
m_stack_top3 = region->laddr().offset(default_userspace_stack_size).get();
m_tss.esp = m_stack_top3;
// NOTE: The stack needs to be 16-byte aligned.
push_value_on_stack((dword)argument);
push_value_on_stack(0);
}
Thread* Thread::clone(Process& process)
{
auto* clone = new Thread(process);
memcpy(clone->m_signal_action_data, m_signal_action_data, sizeof(m_signal_action_data));
clone->m_signal_mask = m_signal_mask;
//clone->m_tss = m_tss;
clone->m_fpu_state = m_fpu_state;
clone->m_has_used_fpu = m_has_used_fpu;
return clone;