From b24835be2728952877cbcfdb2c2e6702d4e0cb53 Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Tue, 29 Jul 2014 22:44:56 -0700
Subject: [PATCH] Removing some xenia requirements from alloy sandbox.

---
 tools/alloy-sandbox/alloy-sandbox.cc | 127 +++++++++++++++++++--------
 1 file changed, 92 insertions(+), 35 deletions(-)

diff --git a/tools/alloy-sandbox/alloy-sandbox.cc b/tools/alloy-sandbox/alloy-sandbox.cc
index db1886d26..162721ddb 100644
--- a/tools/alloy-sandbox/alloy-sandbox.cc
+++ b/tools/alloy-sandbox/alloy-sandbox.cc
@@ -10,62 +10,119 @@
 #include <alloy/alloy.h>
 #include <alloy/backend/ivm/ivm_backend.h>
 #include <alloy/backend/x64/x64_backend.h>
+#include <alloy/frontend/ppc/ppc_context.h>
+#include <alloy/frontend/ppc/ppc_frontend.h>
 #include <alloy/runtime/raw_module.h>
 #include <poly/poly.h>
-#include <xenia/export_resolver.h>
 #include <xenia/cpu/xenon_memory.h>
-#include <xenia/cpu/xenon_runtime.h>
-#include <xenia/cpu/xenon_thread_state.h>
 
 #include <gflags/gflags.h>
 
-using namespace alloy;
-using namespace alloy::backend;
-using namespace alloy::runtime;
-using namespace xe;
-using namespace xe::cpu;
+namespace alloy {
+namespace sandbox {
 
-int alloy_sandbox(int argc, xechar_t** argv) {
-  Profiler::Initialize();
+using alloy::frontend::ppc::PPCContext;
+using alloy::runtime::Runtime;
+
+class ThreadState : public alloy::runtime::ThreadState {
+ public:
+  ThreadState(Runtime* runtime, uint32_t thread_id, size_t stack_size,
+              uint64_t thread_state_address)
+      : alloy::runtime::ThreadState(runtime, thread_id),
+        stack_size_(stack_size),
+        thread_state_address_(thread_state_address) {
+    stack_address_ = memory_->HeapAlloc(0, stack_size, MEMORY_FLAG_ZERO);
+
+    // Allocate with 64b alignment.
+    context_ = (PPCContext*)xe_malloc_aligned(sizeof(PPCContext));
+    assert_true((reinterpret_cast<uint64_t>(context_) & 0xF) == 0);
+    memset(&context_, 0, sizeof(PPCContext));
+
+    // Stash pointers to common structures that callbacks may need.
+    context_->reserve_address = memory_->reserve_address();
+    context_->membase = memory_->membase();
+    context_->runtime = runtime;
+    context_->thread_state = this;
+
+    // Set initial registers.
+    context_->r[1] = stack_address_ + stack_size;
+    context_->r[13] = thread_state_address_;
+
+    // Pad out stack a bit, as some games seem to overwrite the caller by about
+    // 16 to 32b.
+    context_->r[1] -= 64;
+
+    raw_context_ = context_;
+
+    runtime_->debugger()->OnThreadCreated(this);
+  }
+  ~ThreadState() override {
+    runtime_->debugger()->OnThreadDestroyed(this);
+    xe_free_aligned(context_);
+    memory_->HeapFree(stack_address_, stack_size_);
+  }
+
+  PPCContext* context() const { return context_; }
+
+ private:
+  uint64_t stack_address_;
+  size_t stack_size_;
+  uint64_t thread_state_address_;
+
+  // NOTE: must be 64b aligned for SSE ops.
+  PPCContext* context_;
+};
+
+// TODO(benvanik): simple memory? move more into core?
+
+int main(int argc, xechar_t** argv) {
+  xe::Profiler::Initialize();
   xe::Profiler::ThreadEnter("main");
 
-  XenonMemory* memory = new XenonMemory();
+  auto memory = std::make_unique<xe::cpu::XenonMemory>();
+  auto runtime = std::make_unique<Runtime>(memory.get());
 
-  ExportResolver* export_resolver = new ExportResolver();
-  XenonRuntime* runtime = new XenonRuntime(memory, export_resolver);
+  auto frontend =
+      std::make_unique<alloy::frontend::ppc::PPCFrontend>(runtime.get());
+  std::unique_ptr<alloy::backend::Backend> backend;
+  //  auto backend =
+  //      std::make_unique<alloy::backend::ivm::IVMBackend>(runtime.get());
+  //  auto backend =
+  //      std::make_unique<alloy::backend::x64::X64Backend>(runtime.get());
+  runtime->Initialize(std::move(frontend), std::move(backend));
 
-  std::unique_ptr<Backend> backend;
-  // backend.reset(new alloy::backend::ivm::IVMBackend(runtime));
-  // backend.reset(new alloy::backend::x64::X64Backend(runtime));
-  runtime->Initialize(std::move(backend));
-
-  auto module = std::make_unique<RawModule>(runtime);
+  auto module = std::make_unique<alloy::runtime::RawModule>(runtime.get());
   module->LoadFile(0x82000000, "test\\codegen\\instr_add.bin");
   runtime->AddModule(std::move(module));
 
-  XenonThreadState* thread_state =
-      new XenonThreadState(runtime, 100, 64 * 1024, 0);
+  {
+    auto thread_state =
+        std::make_unique<ThreadState>(runtime.get(), 100, 64 * 1024, 0);
 
-  Function* fn;
-  runtime->ResolveFunction(0x82000000, &fn);
-  auto ctx = thread_state->context();
-  ctx->lr = 0xBEBEBEBE;
-  ctx->r[5] = 10;
-  ctx->r[25] = 25;
-  fn->Call(thread_state, ctx->lr);
-  auto result = ctx->r[11];
-  printf("%llu", result);
+    alloy::runtime::Function* fn;
+    runtime->ResolveFunction(0x82000000, &fn);
+    auto ctx = thread_state->context();
+    ctx->lr = 0xBEBEBEBE;
+    ctx->r[5] = 10;
+    ctx->r[25] = 25;
+    fn->Call(thread_state.get(), ctx->lr);
+    auto result = ctx->r[11];
+    printf("%llu", result);
+  }
 
-  delete thread_state;
-
-  delete runtime;
-  delete memory;
+  runtime.reset();
+  memory.reset();
 
   xe::Profiler::Dump();
   xe::Profiler::ThreadExit();
 
   return 0;
 }
+
+}  // namespace sandbox
+}  // namespace alloy
+
+// TODO(benvanik): move main thunk into poly
 // ehhh
 #include <xenia/platform.cc>
-XE_MAIN_THUNK(alloy_sandbox, "alloy-sandbox");
+XE_MAIN_THUNK(alloy::sandbox::main, "alloy-sandbox");