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UserspaceEmulator: Add some convenient SoftMMU APIs for copying data

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We'll soon want to copy data in and out of the SoftMMU memory space.
This commit is contained in:
Andreas Kling 2020-07-12 17:42:57 +02:00
parent 274ac3c628
commit 94f07660e9
2 changed files with 24 additions and 0 deletions
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20
DevTools/UserspaceEmulator/SoftMMU.cpp
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@ -25,6 +25,7 @@
*/
#include "SoftMMU.h"
#include <AK/ByteBuffer.h>
namespace UserspaceEmulator {
@ -119,4 +120,23 @@ void SoftMMU::write32(X86::LogicalAddress address, u32 value)
region->write32(address.offset() - region->base(), value);
}
void SoftMMU::copy_to_vm(FlatPtr destination, const void* source, size_t size)
{
for (size_t i = 0; i < size; ++i)
write8({ 0x20, destination + i }, ((const u8*)source)[i]);
}
void SoftMMU::copy_from_vm(void* destination, const FlatPtr source, size_t size)
{
for (size_t i = 0; i < size; ++i)
((u8*)destination)[i] = read8({ 0x20, source + i });
}
ByteBuffer SoftMMU::copy_buffer_from_vm(const FlatPtr source, size_t size)
{
auto buffer = ByteBuffer::create_uninitialized(size);
copy_from_vm(buffer.data(), source, size);
return buffer;
}
}