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kern: implement SvcSendSyncRequest(WithUserBuffer)

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This commit is contained in:
Michael Scire 2020-07-09 21:30:29 -07:00
parent 4f12449acf
commit 1b2203d102
8 changed files with 228 additions and 10 deletions
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70
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -439,6 +439,67 @@ namespace ams::kern {
return ResultSuccess();
}
Result KPageTableBase::LockMemoryAndOpen(KPageGroup *out_pg, KPhysicalAddress *out_paddr, KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr, KMemoryPermission new_perm, u32 lock_attr) {
/* Validate basic preconditions. */
MESOSPHERE_ASSERT((attr_mask & lock_attr) == lock_attr);
MESOSPHERE_ASSERT((attr & lock_attr) == lock_attr);
/* Validate the lock request. */
const size_t num_pages = size / PageSize;
R_UNLESS(this->Contains(addr, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check that the output page group is empty, if it exists. */
if (out_pg) {
MESOSPHERE_ASSERT(out_pg->GetNumPages() == 0);
}
/* Check the state. */
KMemoryState old_state;
KMemoryPermission old_perm;
KMemoryAttribute old_attr;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr), addr, size, state_mask | KMemoryState_FlagReferenceCounted, state | KMemoryState_FlagReferenceCounted, perm_mask, perm, attr_mask, attr));
/* Get the physical address, if we're supposed to. */
if (out_paddr != nullptr) {
MESOSPHERE_ABORT_UNLESS(this->GetPhysicalAddress(out_paddr, addr));
}
/* Make the page group, if we're supposed to. */
if (out_pg != nullptr) {
R_TRY(this->MakePageGroup(*out_pg, addr, num_pages));
}
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* Decide on new perm and attr. */
new_perm = (new_perm != KMemoryPermission_None) ? new_perm : old_perm;
KMemoryAttribute new_attr = static_cast<KMemoryAttribute>(old_attr | lock_attr);
/* Update permission, if we need to. */
if (new_perm != old_perm) {
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
const KPageProperties properties = { new_perm, false, (old_attr & KMemoryAttribute_Uncached) != 0, true };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
}
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(allocator), addr, num_pages, old_state, new_perm, new_attr);
/* If we have an output group, open. */
if (out_pg) {
out_pg->Open();
}
return ResultSuccess();
}
Result KPageTableBase::UnlockMemory(KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr, KMemoryPermission new_perm, u32 lock_attr, const KPageGroup *pg) {
/* Validate basic preconditions. */
MESOSPHERE_ASSERT((attr_mask & lock_attr) == lock_attr);
@ -1213,6 +1274,15 @@ namespace ams::kern {
return ResultSuccess();
}
Result KPageTableBase::LockForIpcUserBuffer(KPhysicalAddress *out, KProcessAddress address, size_t size) {
return this->LockMemoryAndOpen(nullptr, out, address, size,
KMemoryState_FlagCanIpcUserBuffer, KMemoryState_FlagCanIpcUserBuffer,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,
KMemoryAttribute_All, KMemoryAttribute_None,
static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite),
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked);
}
Result KPageTableBase::UnlockForIpcUserBuffer(KProcessAddress address, size_t size) {
return this->UnlockMemory(address, size,
KMemoryState_FlagCanIpcUserBuffer, KMemoryState_FlagCanIpcUserBuffer,