blob: 2b480488a8bc89696027e50bd8d5f47acd937f6b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// 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::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(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();
// We succeeded.
R_SUCCEED();
}
}
void CodeMemory::Finalize() {
if (m_code_memory) {
R_ASSERT(m_code_memory->UnmapFromOwner(m_address, m_size));
m_code_memory->Close();
}
m_code_memory = nullptr;
}
} // namespace Service::JIT
|
