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Kernel: Simplify writing to threads stacks 

This can be done more simply as all stacks are now page aligned
This commit is contained in:
Bananymous 2024-02-25 21:57:33 +02:00
parent 6d59a2b45d
commit 5c39903323
1 changed files with 18 additions and 17 deletions
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35
kernel/kernel/Thread.cpp
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@ -179,14 +179,15 @@ namespace Kernel
// Signal mask is inherited
// Setup stack for returning
{
// FIXME: don't use PageTableScope
PageTableScope _(process().page_table());
write_to_stack(m_rsp, nullptr); // alignment
write_to_stack(m_rsp, this);
write_to_stack(m_rsp, &Thread::on_exit);
write_to_stack(m_rsp, nullptr);
}
ASSERT_EQ(m_rsp % PAGE_SIZE, 0u);
PageTable::with_fast_page(process().page_table().physical_address_of(m_rsp - PAGE_SIZE), [&] {
uintptr_t rsp = PageTable::fast_page() + PAGE_SIZE;
write_to_stack(rsp, nullptr); // alignment
write_to_stack(rsp, this);
write_to_stack(rsp, &Thread::on_exit);
write_to_stack(rsp, nullptr);
m_rsp -= 4 * sizeof(uintptr_t);
});
}
void Thread::setup_process_cleanup()
@ -206,15 +207,15 @@ namespace Kernel
m_signal_pending_mask = 0;
m_signal_block_mask = ~0ull;
// Setup stack for returning
{
// FIXME: don't use PageTableScope
PageTableScope _(process().page_table());
write_to_stack(m_rsp, nullptr); // alignment
write_to_stack(m_rsp, this);
write_to_stack(m_rsp, &Thread::on_exit);
write_to_stack(m_rsp, m_process);
}
ASSERT_EQ(m_rsp % PAGE_SIZE, 0u);
PageTable::with_fast_page(process().page_table().physical_address_of(m_rsp - PAGE_SIZE), [&] {
uintptr_t rsp = PageTable::fast_page() + PAGE_SIZE;
write_to_stack(rsp, nullptr); // alignment
write_to_stack(rsp, this);
write_to_stack(rsp, &Thread::on_exit);
write_to_stack(rsp, m_process);
m_rsp -= 4 * sizeof(uintptr_t);
});
}
bool Thread::is_interrupted_by_signal()