From 3b449f289fd23ca8d18aa3eb19b0d5fd643e5bad Mon Sep 17 00:00:00 2001
From: lizzie <lizzie@eden-emu.dev>
Date: Sat, 6 Dec 2025 22:44:37 +0000
Subject: [PATCH] stupid swap system + exit_fn

---
 src/common/host_memory.cpp    |  1 +
 src/common/virtual_buffer.cpp | 28 +++++++++++++++++++++++++++-
 src/common/virtual_buffer.h   |  1 +
 src/yuzu_cmd/yuzu.cpp         | 11 +++++++++--
 4 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp
index 9fa3b611c9..13f6b33885 100644
--- a/src/common/host_memory.cpp
+++ b/src/common/host_memory.cpp
@@ -701,6 +701,7 @@ private:
 
 HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_) : backing_size(backing_size_), virtual_size(virtual_size_) {
 #ifdef __OPENORBIS__
+    Common::InitSwap();
     LOG_WARNING(HW_Memory, "Platform doesn't support fastmem");
     fallback_buffer.emplace(backing_size);
     backing_base = fallback_buffer->data();
diff --git a/src/common/virtual_buffer.cpp b/src/common/virtual_buffer.cpp
index 5a05f12d47..34f9c57463 100644
--- a/src/common/virtual_buffer.cpp
+++ b/src/common/virtual_buffer.cpp
@@ -10,6 +10,10 @@
 #include <sys/mman.h>
 #endif
 
+#ifdef __OPENORBIS__
+#include <csignal>
+#endif
+
 #include "common/assert.h"
 #include "common/virtual_buffer.h"
 #include "common/logging/log.h"
@@ -33,7 +37,7 @@ void* AllocateMemoryPages(std::size_t size) noexcept {
     void* addr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
     ASSERT(addr != nullptr);
 #elif defined(__OPENORBIS__)
-    void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+    void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_VOID | MAP_PRIVATE, -1, 0);
     ASSERT(addr != MAP_FAILED);
 #else
     void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
@@ -53,4 +57,26 @@ void FreeMemoryPages(void* addr, [[maybe_unused]] std::size_t size) noexcept {
 #endif
 }
 
+#ifdef __OPENORBIS__
+static struct sigaction old_sa_segv;
+static void SwapHandler(int sig, siginfo_t* si, void* raw_context) {
+    void* a_addr = reinterpret_cast<void*>(uintptr_t(si->si_addr) & ~0xfff);
+    mmap(a_addr, 4096, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+    //mprotect(a_addr, 4096, PROT_READ | PROT_WRITE);
+}
+
+bool InitSwap() noexcept {
+    struct sigaction sa;
+    sa.sa_handler = NULL;
+    sa.sa_sigaction = &SwapHandler;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = SA_SIGINFO | SA_RESTART;
+    return sigaction(SIGSEGV, &sa, &old_sa_segv) == 0;
+}
+#else
+bool InitSwap() noexcept {
+    return true;
+}
+#endif
+
 } // namespace Common
diff --git a/src/common/virtual_buffer.h b/src/common/virtual_buffer.h
index bb012196fe..407f6eb3d3 100644
--- a/src/common/virtual_buffer.h
+++ b/src/common/virtual_buffer.h
@@ -12,6 +12,7 @@ namespace Common {
 
 void* AllocateMemoryPages(std::size_t size) noexcept;
 void FreeMemoryPages(void* base, std::size_t size) noexcept;
+bool InitSwap() noexcept;
 
 template <typename T>
 class VirtualBuffer final {
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index 4d1c43031d..8d3ead201f 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -52,6 +52,7 @@
 #endif
 
 #ifdef __OPENORBIS__
+#include <orbis/SystemService.h>
 #   define STUB_WEAK(name) extern "C" void name() { printf("called " #name); asm volatile("ud2"); }
 STUB_WEAK(__cxa_thread_atexit)
 STUB_WEAK(__assert)
@@ -433,10 +434,15 @@ int main(int argc, char** argv) {
             [](VideoCore::LoadCallbackStage, size_t value, size_t total) {});
     }
 
-    system.RegisterExitCallback([&] {
+    auto const exit_fn = [&] {
+#ifdef __OPENORBIS__
+        sceSystemServiceLoadExec("EXIT", nullptr);
+#else
         // Just exit right away.
         exit(0);
-    });
+#endif
+    };
+    system.RegisterExitCallback(exit_fn);
 
 #ifdef __linux__
     Common::Linux::StartGamemode();
@@ -458,6 +464,7 @@ int main(int argc, char** argv) {
 #endif
 
     detached_tasks.WaitForAllTasks();
+    exit_fn();
     return 0;
 }