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kern: add SvcFlushProcessDataCache, SvcStoreProcessDataCache

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Michael Scire 2020-07-22 19:17:39 -07:00 committed by SciresM
parent ab96255a5d
commit 3917ecad46
1 changed files with 108 additions and 4 deletions
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112
libraries/libmesosphere/source/svc/kern_svc_cache.cpp
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@ -21,7 +21,111 @@ namespace ams::kern::svc {
namespace { namespace {
class CacheOperation {
public:
virtual void Operate(void *address, size_t size) const = 0;
};
Result DoProcessCacheOperation(const CacheOperation &operation, KProcessPageTable &page_table, uintptr_t address, size_t size) {
/* Determine aligned extents. */
const uintptr_t aligned_start = util::AlignDown(address, PageSize);
const uintptr_t aligned_end = util::AlignUp(address + size, PageSize);
const size_t num_pages = (aligned_end - aligned_start) / PageSize;
/* Create a page group for the process's memory. */
KPageGroup pg(page_table.GetBlockInfoManager());
/* Make and open the page group. */
R_TRY(page_table.MakeAndOpenPageGroup(std::addressof(pg),
aligned_start, num_pages,
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
KMemoryPermission_UserRead, KMemoryPermission_UserRead,
KMemoryAttribute_Uncached, KMemoryAttribute_None));
/* Ensure we don't leak references to the pages we're operating on. */
ON_SCOPE_EXIT { pg.Close(); };
/* Operate on all the blocks. */
uintptr_t cur_address = aligned_start;
size_t remaining = size;
for (const auto &block : pg) {
/* Get the block extents. */
KVirtualAddress operate_address = block.GetAddress();
size_t operate_size = block.GetSize();
/* Adjust to remain within range. */
if (cur_address < address) {
operate_address += (address - cur_address);
}
if (operate_size > remaining) {
operate_size = remaining;
}
/* Operate. */
operation.Operate(GetVoidPointer(operate_address), operate_size);
/* Advance. */
cur_address += block.GetSize();
remaining -= operate_size;
}
MESOSPHERE_ASSERT(remaining == 0);
return ResultSuccess();
}
Result StoreProcessDataCache(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
/* Validate address/size. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
/* Get the process from its handle. */
KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
/* Verify the region is within range. */
auto &page_table = process->GetPageTable();
R_UNLESS(page_table.Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Perform the operation. */
if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
return cpu::StoreDataCache(reinterpret_cast<void *>(address), size);
} else {
class StoreCacheOperation : public CacheOperation {
public:
virtual void Operate(void *address, size_t size) const override { cpu::StoreDataCache(address, size); }
} operation;
return DoProcessCacheOperation(operation, page_table, address, size);
}
}
Result FlushProcessDataCache(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
/* Validate address/size. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
/* Get the process from its handle. */
KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
/* Verify the region is within range. */
auto &page_table = process->GetPageTable();
R_UNLESS(page_table.Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Perform the operation. */
if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
return cpu::FlushDataCache(reinterpret_cast<void *>(address), size);
} else {
class FlushCacheOperation : public CacheOperation {
public:
virtual void Operate(void *address, size_t size) const override { cpu::FlushDataCache(address, size); }
} operation;
return DoProcessCacheOperation(operation, page_table, address, size);
}
}
} }
@ -40,11 +144,11 @@ namespace ams::kern::svc {
} }
Result StoreProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) { Result StoreProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcStoreProcessDataCache64 was called."); return StoreProcessDataCache(process_handle, address, size);
} }
Result FlushProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) { Result FlushProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcFlushProcessDataCache64 was called."); return FlushProcessDataCache(process_handle, address, size);
} }
/* ============================= 64From32 ABI ============================= */ /* ============================= 64From32 ABI ============================= */
@ -62,11 +166,11 @@ namespace ams::kern::svc {
} }
Result StoreProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) { Result StoreProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcStoreProcessDataCache64From32 was called."); return StoreProcessDataCache(process_handle, address, size);
} }
Result FlushProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) { Result FlushProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcFlushProcessDataCache64From32 was called."); return FlushProcessDataCache(process_handle, address, size);
} }
} }