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Kernel: Remove unused MemoryManager::validate_range()

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This is no longer used since we've switched to using the MMU to
generate EFAULT errors.
This commit is contained in:
Andreas Kling 2021-02-08 15:25:12 +01:00
parent cf5ab665e0
commit b2cba3036e
2 changed files with 0 additions and 43 deletions
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35
Kernel/VM/MemoryManager.cpp
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@ -841,41 +841,6 @@ void MemoryManager::unquickmap_page()
mm_data.m_quickmap_in_use.unlock(mm_data.m_quickmap_prev_flags);
}
template<MemoryManager::AccessSpace space, MemoryManager::AccessType access_type>
bool MemoryManager::validate_range(const Process& process, VirtualAddress base_vaddr, size_t size) const
{
ASSERT(s_mm_lock.is_locked());
ASSERT(size);
if (base_vaddr > base_vaddr.offset(size)) {
dbgln("Shenanigans! Asked to validate wrappy {} size={}", base_vaddr, size);
return false;
}
VirtualAddress vaddr = base_vaddr.page_base();
VirtualAddress end_vaddr = base_vaddr.offset(size - 1).page_base();
if (end_vaddr < vaddr) {
dbgln("Shenanigans! Asked to validate {} size={}", base_vaddr, size);
return false;
}
const Region* region = nullptr;
while (vaddr <= end_vaddr) {
if (!region || !region->contains(vaddr)) {
if (space == AccessSpace::Kernel)
region = kernel_region_from_vaddr(vaddr);
if (!region || !region->contains(vaddr))
region = user_region_from_vaddr(const_cast<Process&>(process), vaddr);
if (!region
|| (space == AccessSpace::User && !region->is_user_accessible())
|| (access_type == AccessType::Read && !region->is_readable())
|| (access_type == AccessType::Write && !region->is_writable())) {
return false;
}
}
vaddr = region->range().end();
}
return true;
}
bool MemoryManager::validate_user_stack(const Process& process, VirtualAddress vaddr) const
{
if (!is_user_address(vaddr))