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os: implement SharedMemory, update AslrSpaceManager

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This commit is contained in:
Michael Scire 2021-10-01 00:36:18 -07:00
parent 101e3087fe
commit 82f3416799
20 changed files with 737 additions and 196 deletions
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157
libraries/libstratosphere/source/os/os_shared_memory.cpp Normal file
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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "impl/os_thread_manager.hpp"
#include "impl/os_shared_memory_impl.hpp"
namespace ams::os {
namespace {
void SetupSharedMemoryType(SharedMemoryType *shared_memory, size_t size, Handle handle, bool managed) {
/* Set members. */
shared_memory->handle = handle;
shared_memory->size = size;
shared_memory->address = nullptr;
shared_memory->allocated = false;
/* Set managed. */
shared_memory->handle_managed = managed;
/* Create the critical section. */
util::ConstructAt(shared_memory->cs_shared_memory);
}
}
Result CreateSharedMemory(SharedMemoryType *shared_memory, size_t size, MemoryPermission my_perm, MemoryPermission other_perm) {
/* Check pre-conditions. */
AMS_ASSERT(size > 0);
AMS_ASSERT(util::IsAligned(size, MemoryPageSize));
/* Create the memory. */
Handle handle;
R_TRY(impl::SharedMemoryImpl::Create(std::addressof(handle), size, my_perm, other_perm));
/* Setup the object. */
SetupSharedMemoryType(shared_memory, size, handle, true);
return ResultSuccess();
}
void AttachSharedMemory(SharedMemoryType *shared_memory, size_t size, Handle handle, bool managed) {
/* Check pre-conditions. */
AMS_ASSERT(size > 0);
AMS_ASSERT(util::IsAligned(size, MemoryPageSize));
AMS_ASSERT(handle != svc::InvalidHandle);
/* Setup the object. */
SetupSharedMemoryType(shared_memory, size, handle, managed);
}
void DestroySharedMemory(SharedMemoryType *shared_memory) {
/* Unmap the shared memory, if required. */
if (shared_memory->state == SharedMemoryType::State_Mapped) {
UnmapSharedMemory(shared_memory);
}
/* Check the state. */
AMS_ASSERT(shared_memory->state == SharedMemoryType::State_Initialized);
/* Set state to not initialized. */
shared_memory->state = SharedMemoryType::State_NotInitialized;
/* Close the handle, if it's managed. */
if (shared_memory->handle_managed) {
impl::SharedMemoryImpl::Close(shared_memory->handle);
}
shared_memory->handle_managed = false;
/* Clear members. */
shared_memory->address = nullptr;
shared_memory->size = 0;
shared_memory->handle = svc::InvalidHandle;
/* Destroy the critical section. */
util::DestroyAt(shared_memory->cs_shared_memory);
}
void *MapSharedMemory(SharedMemoryType *shared_memory, MemoryPermission perm) {
/* Lock the current thread, and then the shared memory. */
std::scoped_lock thread_lk(util::GetReference(impl::GetCurrentThread()->cs_thread));
std::scoped_lock lk(util::GetReference(shared_memory->cs_shared_memory));
/* Ensure we're in a mappable state. */
AMS_ASSERT(shared_memory->state == SharedMemoryType::State_Initialized);
/* Try to map. */
void *mapped_address;
if (R_FAILED(impl::SharedMemoryImpl::Map(std::addressof(mapped_address), shared_memory->handle, shared_memory->size, perm))) {
return nullptr;
}
/* Set fields now that we've mapped successfully. */
shared_memory->allocated = true;
shared_memory->address = mapped_address;
shared_memory->state = SharedMemoryType::State_Mapped;
return mapped_address;
}
void UnmapSharedMemory(SharedMemoryType *shared_memory) {
/* Lock the memory. */
std::scoped_lock lk(util::GetReference(shared_memory->cs_shared_memory));
/* If the memory isn't mapped, we can't unmap it. */
if (shared_memory->state != SharedMemoryType::State_Mapped) {
return;
}
/* Unmap the memory. */
impl::SharedMemoryImpl::Unmap(shared_memory->handle, shared_memory->address, shared_memory->size);
/* Unmapped memory is necessarily not allocated. */
if (shared_memory->allocated) {
shared_memory->allocated = false;
}
/* Clear the address. */
shared_memory->address = nullptr;
shared_memory->state = SharedMemoryType::State_Initialized;
}
void *GetSharedMemoryAddress(const SharedMemoryType *shared_memory) {
/* Check pre-conditions. */
AMS_ASSERT(shared_memory->state == SharedMemoryType::State_Initialized || shared_memory->state == SharedMemoryType::State_Mapped);
return shared_memory->address;
}
size_t GetSharedMemorySize(const SharedMemoryType *shared_memory) {
/* Check pre-conditions. */
AMS_ASSERT(shared_memory->state == SharedMemoryType::State_Initialized || shared_memory->state == SharedMemoryType::State_Mapped);
return shared_memory->size;
}
Handle GetSharedMemoryHandle(const SharedMemoryType *shared_memory) {
/* Check pre-conditions. */
AMS_ASSERT(shared_memory->state == SharedMemoryType::State_Initialized || shared_memory->state == SharedMemoryType::State_Mapped);
return shared_memory->handle;
}
}