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Kernel: Copy "stack" and "mmap" bits when splitting a Region

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This commit is contained in:
Andreas Kling 2020-01-29 19:24:42 +01:00
parent c9e877a294
commit afd2b5a53e
1 changed files with 2 additions and 0 deletions
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2
Kernel/Process.cpp
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@ -168,6 +168,8 @@ static unsigned prot_to_region_access_flags(int prot)
Region& Process::allocate_split_region(const Region& source_region, const Range& range, size_t offset_in_vmobject) Region& Process::allocate_split_region(const Region& source_region, const Range& range, size_t offset_in_vmobject)
{ {
auto& region = add_region(Region::create_user_accessible(range, source_region.vmobject(), offset_in_vmobject, source_region.name(), source_region.access())); auto& region = add_region(Region::create_user_accessible(range, source_region.vmobject(), offset_in_vmobject, source_region.name(), source_region.access()));
region.set_mmap(source_region.is_mmap());
region.set_stack(source_region.is_stack());
size_t page_offset_in_source_region = (offset_in_vmobject - source_region.offset_in_vmobject()) / PAGE_SIZE; size_t page_offset_in_source_region = (offset_in_vmobject - source_region.offset_in_vmobject()) / PAGE_SIZE;
for (size_t i = 0; i < region.page_count(); ++i) { for (size_t i = 0; i < region.page_count(); ++i) {
if (source_region.should_cow(page_offset_in_source_region + i)) if (source_region.should_cow(page_offset_in_source_region + i))