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UserspaceEmulator: Fix page determination

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Note that this *only* affects the last few bytes of the ELF headers, since all
other allocations are PAGE_SIZE aligned.
This commit is contained in:
Ben Wiederhake 2020-12-09 23:10:33 +01:00 • committed by Andreas Kling
parent e119d7d6b9
commit ebbae015ef
1 changed files with 3 additions and 2 deletions
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5
DevTools/UserspaceEmulator/SoftMMU.cpp
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@ -48,8 +48,9 @@ void SoftMMU::add_region(NonnullOwnPtr<Region> region)
m_shbuf_regions.set(static_cast<SharedBufferRegion*>(region.ptr())->shbuf_id(), region.ptr());
size_t first_page_in_region = region->base() / PAGE_SIZE;
for (size_t i = 0; i < ceil_div(region->size(), PAGE_SIZE); ++i) {
m_page_to_region_map[first_page_in_region + i] = region.ptr();
size_t last_page_in_region = (region->base() + region->size() - 1) / PAGE_SIZE;
for (size_t page = first_page_in_region; page <= last_page_in_region; ++page) {
m_page_to_region_map[page] = region.ptr();
}
m_regions.append(move(region));