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Start working on memory-mapped files.

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First of all, change sys$mmap to take a struct SC_mmap_params since our
sycsall calling convention can't handle more than 3 arguments.

This exposed a bug in Syscall::invoke() needing to use clobber lists.
It was a bit confusing to debug. :^)
This commit is contained in:
Andreas Kling 2018-11-08 11:37:01 +01:00
parent 41a751c90c
commit fdbd9f1e27
14 changed files with 82 additions and 26 deletions
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4
Kernel/MemoryManager.h
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@ -9,6 +9,7 @@
#include <AK/Vector.h>
#include <AK/HashTable.h>
#include <AK/String.h>
#include <VirtualFileSystem/VirtualFileSystem.h>
class Process;
extern Process* current;
@ -71,6 +72,9 @@ struct Region : public Retainable<Region> {
return (laddr - linearAddress).get() / PAGE_SIZE;
}
RetainPtr<VirtualFileSystem::Node> m_file;
Unix::off_t m_file_offset { 0 };
LinearAddress linearAddress;
size_t size { 0 };
Vector<RetainPtr<PhysicalPage>> physical_pages;