svc: Implement SetHeapSize.

src/core/hle/function_wrappers.h

@@ -42,9 +42,17 @@ void Wrap() {
     FuncReturn(func(PARAM(0), PARAM(1)).raw);
 }
 
-template <ResultCode func(u64, u64, u64)>
+template <ResultCode func(u64, u64, s64)>
 void Wrap() {
-    FuncReturn(func(PARAM(0), PARAM(1), PARAM(2)).raw);
+    FuncReturn(func(PARAM(1), PARAM(2), (s64)PARAM(3)).raw);
+}
+
+template <ResultCode func(u64*, u64)>
+void Wrap() {
+    u64 param_1 = 0;
+    u32 retval = func(&param_1, PARAM(1)).raw;
+    Core::CPU().SetReg(1, param_1);
+    FuncReturn(retval);
 }
 
 template <ResultCode func(u64*, u64, u64, u64)>

src/core/hle/svc.cpp

@@ -24,6 +24,14 @@ using Kernel::SharedPtr;
 
 namespace SVC {
 
+/// Set the process heap to a given Size. It can both extend and shrink the heap.
+static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
+    LOG_TRACE(Kernel_SVC, "called, heap_size=%ull", heap_size);
+    auto& process = *Kernel::g_current_process;
+    CASCADE_RESULT(*heap_addr, process.HeapAllocate(Memory::HEAP_VADDR, heap_size, Kernel::VMAPermission::ReadWrite));
+    return RESULT_SUCCESS;
+}
+
 /// Connect to an OS service given the port name, returns the handle to the port to out
 static ResultCode ConnectToPort(Kernel::Handle* out_handle, VAddr port_name_address) {
     if (!Memory::IsValidVirtualAddress(port_name_address))
@@ -205,7 +213,7 @@ struct FunctionDef {
 
 static const FunctionDef SVC_Table[] = {
     {0x00, nullptr, "Unknown"},
-    {0x01, nullptr, "svcSetHeapSize"},
+    {0x01, HLE::Wrap<SetHeapSize>, "svcSetHeapSize"},
     {0x02, nullptr, "svcSetMemoryPermission"},
     {0x03, nullptr, "svcSetMemoryAttribute"},
     {0x04, nullptr, "svcMapMemory"},