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Kernel: Move userspace virtual address range base to 0x10000

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Now that the shared bottom 2 MiB virtual address mappings are gone
userspace can use lower virtual addresses.
This commit is contained in:
Idan Horowitz 2021-12-19 19:36:42 +02:00 • committed by Brian Gianforcaro
commit 5f4a67434c
Notes: sideshowbarker 2024-07-17 22:23:12 +09:00
7 changed files with 18 additions and 4 deletions
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2
Kernel/Memory/Region.cpp
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@ -179,7 +179,7 @@ bool Region::map_individual_page_impl(size_t page_index)
VERIFY(m_page_directory->get_lock().is_locked_by_current_processor());
auto page_vaddr = vaddr_from_page_index(page_index);
bool user_allowed = page_vaddr.get() >= 0x00800000 && is_user_address(page_vaddr);
bool user_allowed = page_vaddr.get() >= USER_RANGE_BASE && is_user_address(page_vaddr);
if (is_mmap() && !user_allowed) {
PANIC("About to map mmap'ed page at a kernel address");
}