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Merge pull request #1315 from lioncash/size 

kernel/svc: Handle a few error cases within memory-related functions
master
bunnei 2018-09-17 10:11:26 +07:00 committed by GitHub
parent 3476ba2aee 4f8756edd0
commit e6367ab955
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 74 additions and 19 deletions
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2
src/core/hle/kernel/errors.h
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@ -17,6 +17,7 @@ enum {
// Confirmed Switch OS error codes
MaxConnectionsReached = 7,
InvalidSize = 101,
InvalidAddress = 102,
HandleTableFull = 105,
InvalidMemoryState = 106,
@ -55,6 +56,7 @@ constexpr ResultCode ERR_INVALID_MEMORY_PERMISSIONS(ErrorModule::Kernel,
ErrCodes::InvalidMemoryPermissions);
constexpr ResultCode ERR_INVALID_HANDLE(ErrorModule::Kernel, ErrCodes::InvalidHandle);
constexpr ResultCode ERR_INVALID_PROCESSOR_ID(ErrorModule::Kernel, ErrCodes::InvalidProcessorId);
constexpr ResultCode ERR_INVALID_SIZE(ErrorModule::Kernel, ErrCodes::InvalidSize);
constexpr ResultCode ERR_INVALID_STATE(ErrorModule::Kernel, ErrCodes::InvalidState);
constexpr ResultCode ERR_INVALID_THREAD_PRIORITY(ErrorModule::Kernel,
ErrCodes::InvalidThreadPriority);

91
src/core/hle/kernel/svc.cpp
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@ -35,10 +35,21 @@
#include "core/hle/service/service.h"
namespace Kernel {
namespace {
constexpr bool Is4KBAligned(VAddr address) {
return (address & 0xFFF) == 0;
}
} // Anonymous namespace
/// Set the process heap to a given Size. It can both extend and shrink the heap.
static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
LOG_TRACE(Kernel_SVC, "called, heap_size=0x{:X}", heap_size);
// Size must be a multiple of 0x200000 (2MB) and be equal to or less than 4GB.
if ((heap_size & 0xFFFFFFFE001FFFFF) != 0) {
return ERR_INVALID_SIZE;
}
auto& process = *Core::CurrentProcess();
CASCADE_RESULT(*heap_addr,
process.HeapAllocate(Memory::HEAP_VADDR, heap_size, VMAPermission::ReadWrite));
@ -56,6 +67,15 @@ static ResultCode SetMemoryAttribute(VAddr addr, u64 size, u32 state0, u32 state
static ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
src_addr, size);
if (!Is4KBAligned(dst_addr) || !Is4KBAligned(src_addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
return Core::CurrentProcess()->MirrorMemory(dst_addr, src_addr, size);
}
@ -63,6 +83,15 @@ static ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
static ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
src_addr, size);
if (!Is4KBAligned(dst_addr) || !Is4KBAligned(src_addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
return Core::CurrentProcess()->UnmapMemory(dst_addr, src_addr, size);
}
@ -415,35 +444,43 @@ static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 s
"called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
shared_memory_handle, addr, size, permissions);
if (!Is4KBAligned(addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
const auto permissions_type = static_cast<MemoryPermission>(permissions);
if (permissions_type != MemoryPermission::Read &&
permissions_type != MemoryPermission::ReadWrite) {
LOG_ERROR(Kernel_SVC, "Invalid permissions=0x{:08X}", permissions);
return ERR_INVALID_MEMORY_PERMISSIONS;
}
auto& kernel = Core::System::GetInstance().Kernel();
auto shared_memory = kernel.HandleTable().Get<SharedMemory>(shared_memory_handle);
if (!shared_memory) {
return ERR_INVALID_HANDLE;
}
MemoryPermission permissions_type = static_cast<MemoryPermission>(permissions);
switch (permissions_type) {
case MemoryPermission::Read:
case MemoryPermission::Write:
case MemoryPermission::ReadWrite:
case MemoryPermission::Execute:
case MemoryPermission::ReadExecute:
case MemoryPermission::WriteExecute:
case MemoryPermission::ReadWriteExecute:
case MemoryPermission::DontCare:
return shared_memory->Map(Core::CurrentProcess().get(), addr, permissions_type,
MemoryPermission::DontCare);
default:
LOG_ERROR(Kernel_SVC, "unknown permissions=0x{:08X}", permissions);
}
return RESULT_SUCCESS;
return shared_memory->Map(Core::CurrentProcess().get(), addr, permissions_type,
MemoryPermission::DontCare);
}
static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 size) {
LOG_WARNING(Kernel_SVC, "called, shared_memory_handle=0x{:08X}, addr=0x{:X}, size=0x{:X}",
shared_memory_handle, addr, size);
if (!Is4KBAligned(addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
auto& kernel = Core::System::GetInstance().Kernel();
auto shared_memory = kernel.HandleTable().Get<SharedMemory>(shared_memory_handle);
@ -899,12 +936,28 @@ static ResultCode CreateSharedMemory(Handle* handle, u64 size, u32 local_permiss
LOG_TRACE(Kernel_SVC, "called, size=0x{:X}, localPerms=0x{:08X}, remotePerms=0x{:08X}", size,
local_permissions, remote_permissions);
// Size must be a multiple of 4KB and be less than or equal to
// approx. 8 GB (actually (1GB - 512B) * 8)
if (size == 0 || (size & 0xFFFFFFFE00000FFF) != 0) {
return ERR_INVALID_SIZE;
}
const auto local_perms = static_cast<MemoryPermission>(local_permissions);
if (local_perms != MemoryPermission::Read && local_perms != MemoryPermission::ReadWrite) {
return ERR_INVALID_MEMORY_PERMISSIONS;
}
const auto remote_perms = static_cast<MemoryPermission>(remote_permissions);
if (remote_perms != MemoryPermission::Read && remote_perms != MemoryPermission::ReadWrite &&
remote_perms != MemoryPermission::DontCare) {
return ERR_INVALID_MEMORY_PERMISSIONS;
}
auto& kernel = Core::System::GetInstance().Kernel();
auto& handle_table = kernel.HandleTable();
auto shared_mem_handle =
SharedMemory::Create(kernel, handle_table.Get<Process>(KernelHandle::CurrentProcess), size,
static_cast<MemoryPermission>(local_permissions),
static_cast<MemoryPermission>(remote_permissions));
local_perms, remote_perms);
CASCADE_RESULT(*handle, handle_table.Create(shared_mem_handle));
return RESULT_SUCCESS;