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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/hle/service/jit/jit_code_memory.h"
namespace Service::JIT {
Result CodeMemory::Initialize(Kernel::KernelCore& kernel, Kernel::KProcess& process, Kernel::KCodeMemory& code_memory, size_t size, Kernel::Svc::MemoryPermission perm, std::mt19937_64& generate_random) {
auto& page_table = process.GetPageTable();
const u64 alias_code_start = GetInteger(page_table.GetAliasCodeRegionStart()) / Kernel::PageSize;
const u64 alias_code_size = page_table.GetAliasCodeRegionSize() / Kernel::PageSize;
// NOTE: This will retry indefinitely until mapping the code memory succeeds.
while (true) {
// Generate a new trial address.
const u64 mapped_address =
(alias_code_start + (generate_random() % alias_code_size)) * Kernel::PageSize;
// Try to map the address
R_TRY_CATCH(code_memory.MapToOwner(kernel, mapped_address, size, perm)) {
R_CATCH(Kernel::ResultInvalidMemoryRegion) {
// If we could not map here, retry.
continue;
}
}
R_END_TRY_CATCH;
// Set members.
m_code_memory = std::addressof(code_memory);
m_size = size;
m_address = mapped_address;
m_perm = perm;
// Open a new reference to the code memory.
m_code_memory->Open(kernel);
// We succeeded.
R_SUCCEED();
}
}
void CodeMemory::Finalize(Kernel::KernelCore& kernel) {
if (m_code_memory) {
R_ASSERT(m_code_memory->UnmapFromOwner(kernel, m_address, m_size));
m_code_memory->Close(kernel);
}
m_code_memory = nullptr;
}
} // namespace Service::JIT
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