From 13a8fde3ad2a4a37cf1bb8dcb367b4c8fc8b4d9b Mon Sep 17 00:00:00 2001 From: Michael Scire Date: Sun, 7 Jul 2019 09:42:54 -0700 Subject: Implement MapPhysicalMemory/UnmapPhysicalMemory This implements svcMapPhysicalMemory/svcUnmapPhysicalMemory for Yuzu, which can be used to map memory at a desired address by games since 3.0.0. It also properly parses SystemResourceSize from NPDM, and makes information available via svcGetInfo. This is needed for games like Super Smash Bros. and Diablo 3 -- this PR's implementation does not run into the "ASCII reads" issue mentioned in the comments of #2626, which was caused by the following bugs in Yuzu's memory management that this PR also addresses: * Yuzu's memory coalescing does not properly merge blocks. This results in a polluted address space/svcQueryMemory results that would be impossible to replicate on hardware, which can lead to game code making the wrong assumptions about memory layout. * This implements better merging for AllocatedMemoryBlocks. * Yuzu's implementation of svcMirrorMemory unprotected the entire virtual memory range containing the range being mirrored. This could lead to games attempting to map data at that unprotected range/attempting to access that range after yuzu improperly unmapped it. * This PR fixes it by simply calling ReprotectRange instead of Reprotect. --- src/core/hle/kernel/process.h | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'src/core/hle/kernel/process.h') diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h index 83ea02bee..b0e795577 100644 --- a/src/core/hle/kernel/process.h +++ b/src/core/hle/kernel/process.h @@ -168,8 +168,9 @@ public: return capabilities.GetPriorityMask(); } - u32 IsVirtualMemoryEnabled() const { - return is_virtual_address_memory_enabled; + /// Gets the amount of secure memory to allocate for memory management. + u32 GetSystemResourceSize() const { + return system_resource_size; } /// Whether this process is an AArch64 or AArch32 process. @@ -298,12 +299,16 @@ private: /// Title ID corresponding to the process u64 program_id = 0; + /// Specifies additional memory to be reserved for the process's memory management by the + /// system. When this is non-zero, secure memory is allocated and used for page table allocation + /// instead of using the normal global page tables/memory block management. + u32 system_resource_size = 0; + /// Resource limit descriptor for this process SharedPtr resource_limit; /// The ideal CPU core for this process, threads are scheduled on this core by default. u8 ideal_core = 0; - u32 is_virtual_address_memory_enabled = 0; /// The Thread Local Storage area is allocated as processes create threads, /// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part -- cgit v1.2.3