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Kernel: Make kernel memory regions be non-executable by default

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From now on, you'll have to request executable memory specifically
if you want some.
This commit is contained in:
Andreas Kling 2019-12-25 22:41:34 +01:00
parent 0b7a2e0a5a
commit 9e55bcb7da
Notes: sideshowbarker 2024-07-19 10:40:27 +09:00
7 changed files with 27 additions and 31 deletions
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4
Kernel/Thread.cpp
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@ -84,7 +84,7 @@ Thread::Thread(Process& process)
m_tss.cr3 = m_process.page_directory().cr3();
if (m_process.is_ring0()) {
m_kernel_stack_region = MM.allocate_kernel_region(default_kernel_stack_size, String::format("Kernel Stack (Thread %d)", m_tid), false, true);
m_kernel_stack_region = MM.allocate_kernel_region(default_kernel_stack_size, String::format("Kernel Stack (Thread %d)", m_tid), Region::Access::Read | Region::Access::Write, false, true);
m_kernel_stack_region->set_stack(true);
m_kernel_stack_base = m_kernel_stack_region->vaddr().get();
m_kernel_stack_top = m_kernel_stack_region->vaddr().offset(default_kernel_stack_size).get() & 0xfffffff8u;
@ -92,7 +92,7 @@ Thread::Thread(Process& process)
kprintf("Allocated ring0 stack @ %p - %p\n", m_kernel_stack_base, m_kernel_stack_top);
} else {
// Ring3 processes need a separate stack for Ring0.
m_kernel_stack_region = MM.allocate_kernel_region(default_kernel_stack_size, String::format("Kernel Stack (Thread %d)", m_tid), false, true);
m_kernel_stack_region = MM.allocate_kernel_region(default_kernel_stack_size, String::format("Kernel Stack (Thread %d)", m_tid), Region::Access::Read | Region::Access::Write, false, true);
m_kernel_stack_region->set_stack(true);
m_kernel_stack_base = m_kernel_stack_region->vaddr().get();
m_kernel_stack_top = m_kernel_stack_region->vaddr().offset(default_kernel_stack_size).get() & 0xfffffff8u;