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Kernel: Slap UNMAP_AFTER_INIT on a whole bunch of functions

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There's no real system here, I just added it to various functions
that I don't believe we ever want to call after initialization
has finished.

With these changes, we're able to unmap 60 KiB of kernel text
after init. :^)
This commit is contained in:
Andreas Kling 2021-02-19 18:41:50 +01:00
parent 32e93c8808
commit fdf03852c9
22 changed files with 69 additions and 68 deletions
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15
Kernel/VM/MemoryManager.cpp
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@ -81,7 +81,7 @@ bool MemoryManager::is_initialized()
return s_the != nullptr;
}
MemoryManager::MemoryManager()
UNMAP_AFTER_INIT MemoryManager::MemoryManager()
{
ScopedSpinLock lock(s_mm_lock);
m_kernel_page_directory = PageDirectory::create_kernel_page_directory();
@ -104,11 +104,11 @@ MemoryManager::MemoryManager()
m_lazy_committed_page = allocate_committed_user_physical_page();
}
MemoryManager::~MemoryManager()
UNMAP_AFTER_INIT MemoryManager::~MemoryManager()
{
}
void MemoryManager::protect_kernel_image()
UNMAP_AFTER_INIT void MemoryManager::protect_kernel_image()
{
ScopedSpinLock page_lock(kernel_page_directory().get_lock());
// Disable writing to the kernel text and rodata segments.
@ -125,7 +125,7 @@ void MemoryManager::protect_kernel_image()
}
}
void MemoryManager::protect_readonly_after_init_memory()
UNMAP_AFTER_INIT void MemoryManager::protect_readonly_after_init_memory()
{
ScopedSpinLock mm_lock(s_mm_lock);
ScopedSpinLock page_lock(kernel_page_directory().get_lock());
@ -153,9 +153,10 @@ void MemoryManager::unmap_memory_after_init()
}
dmesgln("Unmapped {} KiB of kernel text after init! :^)", (end - start) / KiB);
//Processor::halt();
}
void MemoryManager::register_reserved_ranges()
UNMAP_AFTER_INIT void MemoryManager::register_reserved_ranges()
{
ASSERT(!m_physical_memory_ranges.is_empty());
ContiguousReservedMemoryRange range;
@ -194,7 +195,7 @@ bool MemoryManager::is_allowed_to_mmap_to_userspace(PhysicalAddress start_addres
return false;
}
void MemoryManager::parse_memory_map()
UNMAP_AFTER_INIT void MemoryManager::parse_memory_map()
{
RefPtr<PhysicalRegion> physical_region;
@ -414,7 +415,7 @@ void MemoryManager::release_pte(PageDirectory& page_directory, VirtualAddress va
}
}
void MemoryManager::initialize(u32 cpu)
UNMAP_AFTER_INIT void MemoryManager::initialize(u32 cpu)
{
auto mm_data = new MemoryManagerData;
Processor::current().set_mm_data(*mm_data);