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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_scoped_resource_reservation.h"
#include "core/hle/kernel/k_transfer_memory.h"
#include "core/hle/kernel/svc.h"
namespace Kernel::Svc {
namespace {
constexpr bool IsValidTransferMemoryPermission(MemoryPermission perm) {
switch (perm) {
case MemoryPermission::None:
case MemoryPermission::Read:
case MemoryPermission::ReadWrite:
return true;
default:
return false;
}
}
} // Anonymous namespace
/// Creates a TransferMemory object
Result CreateTransferMemory(Core::System& system, Handle* out, u64 address, u64 size,
MemoryPermission map_perm) {
auto& kernel = system.Kernel();
// Validate the size.
R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress);
R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
R_UNLESS(size > 0, ResultInvalidSize);
R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
// Validate the permissions.
R_UNLESS(IsValidTransferMemoryPermission(map_perm), ResultInvalidNewMemoryPermission);
// Get the current process and handle table.
auto& process = GetCurrentProcess(kernel);
auto& handle_table = process.GetHandleTable();
// Reserve a new transfer memory from the process resource limit.
KScopedResourceReservation trmem_reservation(std::addressof(process),
LimitableResource::TransferMemoryCountMax);
R_UNLESS(trmem_reservation.Succeeded(), ResultLimitReached);
// Create the transfer memory.
KTransferMemory* trmem = KTransferMemory::Create(kernel);
R_UNLESS(trmem != nullptr, ResultOutOfResource);
// Ensure the only reference is in the handle table when we're done.
SCOPE_EXIT({ trmem->Close(); });
// Ensure that the region is in range.
R_UNLESS(process.GetPageTable().Contains(address, size), ResultInvalidCurrentMemory);
// Initialize the transfer memory.
R_TRY(trmem->Initialize(address, size, map_perm));
// Commit the reservation.
trmem_reservation.Commit();
// Register the transfer memory.
KTransferMemory::Register(kernel, trmem);
// Add the transfer memory to the handle table.
R_RETURN(handle_table.Add(out, trmem));
}
Result MapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address, uint64_t size,
MemoryPermission owner_perm) {
UNIMPLEMENTED();
R_THROW(ResultNotImplemented);
}
Result UnmapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address,
uint64_t size) {
UNIMPLEMENTED();
R_THROW(ResultNotImplemented);
}
Result MapTransferMemory64(Core::System& system, Handle trmem_handle, uint64_t address,
uint64_t size, MemoryPermission owner_perm) {
R_RETURN(MapTransferMemory(system, trmem_handle, address, size, owner_perm));
}
Result UnmapTransferMemory64(Core::System& system, Handle trmem_handle, uint64_t address,
uint64_t size) {
R_RETURN(UnmapTransferMemory(system, trmem_handle, address, size));
}
Result CreateTransferMemory64(Core::System& system, Handle* out_handle, uint64_t address,
uint64_t size, MemoryPermission map_perm) {
R_RETURN(CreateTransferMemory(system, out_handle, address, size, map_perm));
}
Result MapTransferMemory64From32(Core::System& system, Handle trmem_handle, uint32_t address,
uint32_t size, MemoryPermission owner_perm) {
R_RETURN(MapTransferMemory(system, trmem_handle, address, size, owner_perm));
}
Result UnmapTransferMemory64From32(Core::System& system, Handle trmem_handle, uint32_t address,
uint32_t size) {
R_RETURN(UnmapTransferMemory(system, trmem_handle, address, size));
}
Result CreateTransferMemory64From32(Core::System& system, Handle* out_handle, uint32_t address,
uint32_t size, MemoryPermission map_perm) {
R_RETURN(CreateTransferMemory(system, out_handle, address, size, map_perm));
}
} // namespace Kernel::Svc
|
