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Emulate memory behavior of libSceGnmDriver initialization (#2807)

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* Emulate memory behavior of libSceGnmDriver _DT_INIT

Due to the unique way some games check for sceKernelAllocateDirectMemory failures, emulating this properly is necessary.

* Clang

* Fix address input for direct memory call

* Fix bug with DirectQueryAvailable

Missed this in my prior PR.

* DirectQueryAvailable fix

Fixes error cases to be more hardware accurate.
This commit is contained in:
Stephen Miller
2025-04-18 15:41:33 -05:00
committed by GitHub
parent 23c616c647
commit 0feb2e7211
4 changed files with 16 additions and 10 deletions
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16
src/core/linker.cpp
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@@ -108,10 +108,22 @@ void Linker::Execute(const std::vector<std::string> args) {
static constexpr s64 InternalMemorySize = 0x1000000;
void* addr_out{reinterpret_cast<void*>(KernelAllocBase)};
const s32 ret = Libraries::Kernel::sceKernelMapNamedFlexibleMemory(
&addr_out, InternalMemorySize, 3, 0, "SceKernelInternalMemory");
s32 ret = Libraries::Kernel::sceKernelMapNamedFlexibleMemory(&addr_out, InternalMemorySize, 3,
0, "SceKernelInternalMemory");
ASSERT_MSG(ret == 0, "Unable to perform sceKernelInternalMemory mapping");
// Simulate libSceGnmDriver initialization, which maps a chunk of direct memory.
// Some games fail without accurately emulating this behavior.
s64 phys_addr{};
ret = Libraries::Kernel::sceKernelAllocateDirectMemory(
0, Libraries::Kernel::sceKernelGetDirectMemorySize(), 0x10000, 0x10000, 3, &phys_addr);
if (ret == 0) {
void* addr{reinterpret_cast<void*>(0xfe0000000)};
ret = Libraries::Kernel::sceKernelMapNamedDirectMemory(&addr, 0x10000, 0x13, 0, phys_addr,
0x10000, "SceGnmDriver");
}
ASSERT_MSG(ret == 0, "Unable to emulate libSceGnmDriver initialization");
main_thread.Run([this, module, args](std::stop_token) {
Common::SetCurrentThreadName("GAME_MainThread");
LoadSharedLibraries();