104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/cpu/thread_state.h"
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#include "xenia/base/assert.h"
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#include "xenia/base/threading.h"
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#include "xenia/cpu/runtime.h"
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namespace xe {
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namespace cpu {
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using namespace xe::cpu;
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using PPCContext = xe::cpu::frontend::PPCContext;
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thread_local ThreadState* thread_state_ = nullptr;
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ThreadState::ThreadState(Runtime* runtime, uint32_t thread_id,
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uint32_t stack_address, uint32_t stack_size,
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uint32_t thread_state_address)
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: runtime_(runtime),
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memory_(runtime->memory()),
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thread_id_(thread_id),
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name_(""),
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backend_data_(0),
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stack_size_(stack_size),
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thread_state_address_(thread_state_address) {
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if (thread_id_ == UINT_MAX) {
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// System thread. Assign the system thread ID with a high bit
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// set so people know what's up.
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uint32_t system_thread_handle = xe::threading::current_thread_id();
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thread_id_ = 0x80000000 | system_thread_handle;
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}
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backend_data_ = runtime->backend()->AllocThreadData();
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if (!stack_address) {
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stack_address_ = memory()->SystemHeapAlloc(stack_size);
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stack_allocated_ = true;
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} else {
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stack_address_ = stack_address;
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stack_allocated_ = false;
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}
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assert_not_zero(stack_address_);
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// Allocate with 64b alignment.
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context_ =
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reinterpret_cast<PPCContext*>(_aligned_malloc(sizeof(PPCContext), 64));
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assert_true(((uint64_t)context_ & 0x3F) == 0);
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std::memset(context_, 0, sizeof(PPCContext));
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// Stash pointers to common structures that callbacks may need.
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context_->reserve_address = memory_->reserve_address();
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context_->reserve_value = memory_->reserve_value();
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context_->virtual_membase = memory_->virtual_membase();
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context_->physical_membase = memory_->physical_membase();
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context_->runtime = runtime;
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context_->thread_state = this;
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context_->thread_id = thread_id_;
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// Set initial registers.
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context_->r[1] = stack_address_ + stack_size;
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context_->r[13] = thread_state_address_;
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// Pad out stack a bit, as some games seem to overwrite the caller by about
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// 16 to 32b.
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context_->r[1] -= 64;
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runtime_->debugger()->OnThreadCreated(this);
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}
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ThreadState::~ThreadState() {
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runtime_->debugger()->OnThreadDestroyed(this);
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if (backend_data_) {
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runtime_->backend()->FreeThreadData(backend_data_);
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}
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if (thread_state_ == this) {
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thread_state_ = nullptr;
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}
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_aligned_free(context_);
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if (stack_allocated_) {
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memory()->SystemHeapFree(stack_address_);
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}
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}
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void ThreadState::Bind(ThreadState* thread_state) {
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thread_state_ = thread_state;
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}
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ThreadState* ThreadState::Get() { return thread_state_; }
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uint32_t ThreadState::GetThreadID() { return thread_state_->thread_id_; }
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} // namespace cpu
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} // namespace xe
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