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Kernel: Implement copy-on-write memory for file backed mmaps

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Bananymous
2024-09-11 19:32:42 +03:00
parent 4006a04817
commit c77ad5fb34
15 changed files with 217 additions and 208 deletions
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6
kernel/include/kernel/Process.h
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@@ -210,7 +210,7 @@ namespace Kernel
// Returns error if page could not be allocated
// Returns true if the page was allocated successfully
// Return false if access was page violation (segfault)
BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t addr);
BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t addr, bool wants_write);
BAN::ErrorOr<BAN::String> absolute_path_of(BAN::StringView) const;
@@ -225,8 +225,8 @@ namespace Kernel
static BAN::ErrorOr<BAN::UniqPtr<LibELF::LoadableELF>> load_elf_for_exec(const Credentials&, BAN::StringView file_path, const BAN::String& cwd, Kernel::PageTable&);
BAN::ErrorOr<void> validate_string_access(const char*);
BAN::ErrorOr<void> validate_pointer_access_check(const void*, size_t);
BAN::ErrorOr<void> validate_pointer_access(const void*, size_t);
BAN::ErrorOr<void> validate_pointer_access_check(const void*, size_t, bool needs_write);
BAN::ErrorOr<void> validate_pointer_access(const void*, size_t, bool needs_write);
uint64_t signal_pending_mask() const
{