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Kernel: Make the Process allocate_region* API's understand "int prot".

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Instead of having to inspect 'prot' at every call site, make the Process
API's take care of that so we can just pass it through.
This commit is contained in:
Andreas Kling 2019-05-30 16:14:37 +02:00
parent 8fe72d7b3c
commit baaede1bf9
10 changed files with 79 additions and 46 deletions
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30
Kernel/VM/Region.h
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@ -10,17 +10,24 @@ class VMObject;
class Region : public Retainable<Region> {
friend class MemoryManager;
public:
Region(const Range&, String&&, bool r, bool w, bool cow = false);
Region(const Range&, Retained<VMObject>&&, size_t offset_in_vmo, String&&, bool r, bool w, bool cow = false);
Region(const Range&, RetainPtr<Inode>&&, String&&, bool r, bool w);
enum Access
{
Read = 1,
Write = 2,
Execute = 4,
};
Region(const Range&, String&&, byte access, bool cow = false);
Region(const Range&, Retained<VMObject>&&, size_t offset_in_vmo, String&&, byte access, bool cow = false);
Region(const Range&, RetainPtr<Inode>&&, String&&, byte access);
~Region();
LinearAddress laddr() const { return m_range.base(); }
size_t size() const { return m_range.size(); }
bool is_readable() const { return m_readable; }
bool is_writable() const { return m_writable; }
bool is_readable() const { return m_access & Access::Read; }
bool is_writable() const { return m_access & Access::Write; }
bool is_executable() const { return m_access & Access::Execute; }
String name() const { return m_name; }
void set_name(String&& name) { m_name = move(name); }
@ -81,7 +88,13 @@ public:
bool should_cow(size_t page_index) const { return m_cow_map.get(page_index); }
void set_should_cow(size_t page_index, bool cow) { m_cow_map.set(page_index, cow); }
void set_writable(bool b) { m_writable = b; }
void set_writable(bool b)
{
if (b)
m_access |= Access::Read;
else
m_access &= ~Access::Write;
}
private:
RetainPtr<PageDirectory> m_page_directory;
@ -89,8 +102,7 @@ private:
size_t m_offset_in_vmo { 0 };
Retained<VMObject> m_vmo;
String m_name;
bool m_readable { true };
bool m_writable { true };
byte m_access { 0 };
bool m_shared { false };
Bitmap m_cow_map;
};