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Merge pull request #2194 from lioncash/mem 

svc: Move memory range checking functions to the VMManager class
This commit is contained in:
bunnei 2019-03-06 11:43:07 -05:00 committed by GitHub
parent 5a57b1a09b 40de7f6fe8
commit 234f00bdd4
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 66 additions and 30 deletions
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25
src/core/hle/kernel/svc.cpp
View File

@ -47,23 +47,6 @@ constexpr bool IsValidAddressRange(VAddr address, u64 size) {
return address + size > address;
}
// Checks if a given address range lies within a larger address range.
constexpr bool IsInsideAddressRange(VAddr address, u64 size, VAddr address_range_begin,
VAddr address_range_end) {
const VAddr end_address = address + size - 1;
return address_range_begin <= address && end_address <= address_range_end - 1;
}
bool IsInsideAddressSpace(const VMManager& vm, VAddr address, u64 size) {
return IsInsideAddressRange(address, size, vm.GetAddressSpaceBaseAddress(),
vm.GetAddressSpaceEndAddress());
}
bool IsInsideNewMapRegion(const VMManager& vm, VAddr address, u64 size) {
return IsInsideAddressRange(address, size, vm.GetNewMapRegionBaseAddress(),
vm.GetNewMapRegionEndAddress());
}
// 8 GiB
constexpr u64 MAIN_MEMORY_SIZE = 0x200000000;
@ -105,14 +88,14 @@ ResultCode MapUnmapMemorySanityChecks(const VMManager& vm_manager, VAddr dst_add
return ERR_INVALID_ADDRESS_STATE;
}
if (!IsInsideAddressSpace(vm_manager, src_addr, size)) {
if (!vm_manager.IsWithinAddressSpace(src_addr, size)) {
LOG_ERROR(Kernel_SVC,
"Source is not within the address space, addr=0x{:016X}, size=0x{:016X}",
src_addr, size);
return ERR_INVALID_ADDRESS_STATE;
}
if (!IsInsideNewMapRegion(vm_manager, dst_addr, size)) {
if (!vm_manager.IsWithinNewMapRegion(dst_addr, size)) {
LOG_ERROR(Kernel_SVC,
"Destination is not within the new map region, addr=0x{:016X}, size=0x{:016X}",
dst_addr, size);
@ -238,7 +221,7 @@ static ResultCode SetMemoryPermission(VAddr addr, u64 size, u32 prot) {
auto* const current_process = Core::CurrentProcess();
auto& vm_manager = current_process->VMManager();
if (!IsInsideAddressSpace(vm_manager, addr, size)) {
if (!vm_manager.IsWithinAddressSpace(addr, size)) {
LOG_ERROR(Kernel_SVC,
"Source is not within the address space, addr=0x{:016X}, size=0x{:016X}", addr,
size);
@ -299,7 +282,7 @@ static ResultCode SetMemoryAttribute(VAddr address, u64 size, u32 mask, u32 attr
}
auto& vm_manager = Core::CurrentProcess()->VMManager();
if (!IsInsideAddressSpace(vm_manager, address, size)) {
if (!vm_manager.IsWithinAddressSpace(address, size)) {
LOG_ERROR(Kernel_SVC,
"Given address (0x{:016X}) is outside the bounds of the address space.", address);
return ERR_INVALID_ADDRESS_STATE;

47
src/core/hle/kernel/vm_manager.cpp
View File

@ -17,8 +17,8 @@
#include "core/memory_setup.h"
namespace Kernel {
static const char* GetMemoryStateName(MemoryState state) {
namespace {
const char* GetMemoryStateName(MemoryState state) {
static constexpr const char* names[] = {
"Unmapped", "Io",
"Normal", "CodeStatic",
@ -35,6 +35,14 @@ static const char* GetMemoryStateName(MemoryState state) {
return names[ToSvcMemoryState(state)];
}
// Checks if a given address range lies within a larger address range.
constexpr bool IsInsideAddressRange(VAddr address, u64 size, VAddr address_range_begin,
VAddr address_range_end) {
const VAddr end_address = address + size - 1;
return address_range_begin <= address && end_address <= address_range_end - 1;
}
} // Anonymous namespace
bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const {
ASSERT(base + size == next.base);
if (permissions != next.permissions || state != next.state || attribute != next.attribute ||
@ -249,8 +257,7 @@ ResultCode VMManager::ReprotectRange(VAddr target, u64 size, VMAPermission new_p
}
ResultVal<VAddr> VMManager::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {
if (target < GetHeapRegionBaseAddress() || target + size > GetHeapRegionEndAddress() ||
target + size < target) {
if (!IsWithinHeapRegion(target, size)) {
return ERR_INVALID_ADDRESS;
}
@ -285,8 +292,7 @@ ResultVal<VAddr> VMManager::HeapAllocate(VAddr target, u64 size, VMAPermission p
}
ResultCode VMManager::HeapFree(VAddr target, u64 size) {
if (target < GetHeapRegionBaseAddress() || target + size > GetHeapRegionEndAddress() ||
target + size < target) {
if (!IsWithinHeapRegion(target, size)) {
return ERR_INVALID_ADDRESS;
}
@ -706,6 +712,11 @@ u64 VMManager::GetAddressSpaceWidth() const {
return address_space_width;
}
bool VMManager::IsWithinAddressSpace(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetAddressSpaceBaseAddress(),
GetAddressSpaceEndAddress());
}
VAddr VMManager::GetASLRRegionBaseAddress() const {
return aslr_region_base;
}
@ -750,6 +761,11 @@ u64 VMManager::GetCodeRegionSize() const {
return code_region_end - code_region_base;
}
bool VMManager::IsWithinCodeRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetCodeRegionBaseAddress(),
GetCodeRegionEndAddress());
}
VAddr VMManager::GetHeapRegionBaseAddress() const {
return heap_region_base;
}
@ -762,6 +778,11 @@ u64 VMManager::GetHeapRegionSize() const {
return heap_region_end - heap_region_base;
}
bool VMManager::IsWithinHeapRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetHeapRegionBaseAddress(),
GetHeapRegionEndAddress());
}
VAddr VMManager::GetMapRegionBaseAddress() const {
return map_region_base;
}
@ -774,6 +795,10 @@ u64 VMManager::GetMapRegionSize() const {
return map_region_end - map_region_base;
}
bool VMManager::IsWithinMapRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetMapRegionBaseAddress(), GetMapRegionEndAddress());
}
VAddr VMManager::GetNewMapRegionBaseAddress() const {
return new_map_region_base;
}
@ -786,6 +811,11 @@ u64 VMManager::GetNewMapRegionSize() const {
return new_map_region_end - new_map_region_base;
}
bool VMManager::IsWithinNewMapRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetNewMapRegionBaseAddress(),
GetNewMapRegionEndAddress());
}
VAddr VMManager::GetTLSIORegionBaseAddress() const {
return tls_io_region_base;
}
@ -798,4 +828,9 @@ u64 VMManager::GetTLSIORegionSize() const {
return tls_io_region_end - tls_io_region_base;
}
bool VMManager::IsWithinTLSIORegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetTLSIORegionBaseAddress(),
GetTLSIORegionEndAddress());
}
} // namespace Kernel

24
src/core/hle/kernel/vm_manager.h
View File

@ -432,18 +432,21 @@ public:
/// Gets the address space width in bits.
u64 GetAddressSpaceWidth() const;
/// Determines whether or not the given address range lies within the address space.
bool IsWithinAddressSpace(VAddr address, u64 size) const;
/// Gets the base address of the ASLR region.
VAddr GetASLRRegionBaseAddress() const;
/// Gets the end address of the ASLR region.
VAddr GetASLRRegionEndAddress() const;
/// Determines whether or not the specified address range is within the ASLR region.
bool IsWithinASLRRegion(VAddr address, u64 size) const;
/// Gets the size of the ASLR region
u64 GetASLRRegionSize() const;
/// Determines whether or not the specified address range is within the ASLR region.
bool IsWithinASLRRegion(VAddr address, u64 size) const;
/// Gets the base address of the code region.
VAddr GetCodeRegionBaseAddress() const;
@ -453,6 +456,9 @@ public:
/// Gets the total size of the code region in bytes.
u64 GetCodeRegionSize() const;
/// Determines whether or not the specified range is within the code region.
bool IsWithinCodeRegion(VAddr address, u64 size) const;
/// Gets the base address of the heap region.
VAddr GetHeapRegionBaseAddress() const;
@ -462,6 +468,9 @@ public:
/// Gets the total size of the heap region in bytes.
u64 GetHeapRegionSize() const;
/// Determines whether or not the specified range is within the heap region.
bool IsWithinHeapRegion(VAddr address, u64 size) const;
/// Gets the base address of the map region.
VAddr GetMapRegionBaseAddress() const;
@ -471,6 +480,9 @@ public:
/// Gets the total size of the map region in bytes.
u64 GetMapRegionSize() const;
/// Determines whether or not the specified range is within the map region.
bool IsWithinMapRegion(VAddr address, u64 size) const;
/// Gets the base address of the new map region.
VAddr GetNewMapRegionBaseAddress() const;
@ -480,6 +492,9 @@ public:
/// Gets the total size of the new map region in bytes.
u64 GetNewMapRegionSize() const;
/// Determines whether or not the given address range is within the new map region
bool IsWithinNewMapRegion(VAddr address, u64 size) const;
/// Gets the base address of the TLS IO region.
VAddr GetTLSIORegionBaseAddress() const;
@ -489,6 +504,9 @@ public:
/// Gets the total size of the TLS IO region in bytes.
u64 GetTLSIORegionSize() const;
/// Determines if the given address range is within the TLS IO region.
bool IsWithinTLSIORegion(VAddr address, u64 size) const;
/// Each VMManager has its own page table, which is set as the main one when the owning process
/// is scheduled.
Memory::PageTable page_table;