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Kernel: Make map_typed() & map_typed_writable() fallible using ErrorOr

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This mostly just moved the problem, as a lot of the callers are not
capable of propagating the errors themselves, but it's a step in the
right direction.
This commit is contained in:
Idan Horowitz 2022-01-13 18:20:22 +02:00 • committed by Andreas Kling
parent e2e5d4da16
commit fb3e46e930
14 changed files with 80 additions and 57 deletions
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13
Kernel/Memory/TypedMapping.h
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@ -24,26 +24,23 @@ struct TypedMapping {
};
template<typename T>
static TypedMapping<T> map_typed(PhysicalAddress paddr, size_t length, Region::Access access = Region::Access::Read)
static ErrorOr<TypedMapping<T>> map_typed(PhysicalAddress paddr, size_t length, Region::Access access = Region::Access::Read)
{
TypedMapping<T> table;
size_t mapping_length = page_round_up(paddr.offset_in_page() + length).release_value_but_fixme_should_propagate_errors();
auto region_or_error = MM.allocate_kernel_region(paddr.page_base(), mapping_length, {}, access);
if (region_or_error.is_error())
TODO();
table.region = region_or_error.release_value();
auto mapping_length = TRY(page_round_up(paddr.offset_in_page() + length));
table.region = TRY(MM.allocate_kernel_region(paddr.page_base(), mapping_length, {}, access));
table.offset = paddr.offset_in_page();
return table;
}
template<typename T>
static TypedMapping<T> map_typed(PhysicalAddress paddr)
static ErrorOr<TypedMapping<T>> map_typed(PhysicalAddress paddr)
{
return map_typed<T>(paddr, sizeof(T));
}
template<typename T>
static TypedMapping<T> map_typed_writable(PhysicalAddress paddr)
static ErrorOr<TypedMapping<T>> map_typed_writable(PhysicalAddress paddr)
{
return map_typed<T>(paddr, sizeof(T), Region::Access::Read | Region::Access::Write);
}