83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
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// SPDX-License-Identifier: GPL-3.0-or-later
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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <sys/mman.h>
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#endif
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#ifdef __OPENORBIS__
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#include <csignal>
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#endif
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#include "common/assert.h"
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#include "common/virtual_buffer.h"
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#include "common/logging/log.h"
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// PlayStation 4
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// Flag needs to be undef-ed on non PS4 since it has different semantics
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// on some platforms.
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#ifdef __OPENORBIS__
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# ifndef MAP_SYSTEM
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# define MAP_SYSTEM 0x2000
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# endif
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# ifndef MAP_VOID
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# define MAP_VOID 0x100
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# endif
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#endif
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namespace Common {
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void* AllocateMemoryPages(std::size_t size) noexcept {
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#ifdef _WIN32
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void* addr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
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ASSERT(addr != nullptr);
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#elif defined(__OPENORBIS__)
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void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_VOID | MAP_PRIVATE, -1, 0);
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ASSERT(addr != MAP_FAILED);
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#else
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void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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ASSERT(addr != MAP_FAILED);
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#endif
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return addr;
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}
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void FreeMemoryPages(void* addr, [[maybe_unused]] std::size_t size) noexcept {
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if (!addr)
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return;
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#ifdef _WIN32
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VirtualFree(addr, 0, MEM_RELEASE)
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#else
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int rc = munmap(addr, size);
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ASSERT(rc == 0);
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#endif
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}
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#ifdef __OPENORBIS__
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static struct sigaction old_sa_segv;
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static void SwapHandler(int sig, siginfo_t* si, void* raw_context) {
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void* a_addr = reinterpret_cast<void*>(uintptr_t(si->si_addr) & ~0xfff);
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mmap(a_addr, 4096, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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//mprotect(a_addr, 4096, PROT_READ | PROT_WRITE);
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}
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bool InitSwap() noexcept {
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struct sigaction sa;
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sa.sa_handler = NULL;
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sa.sa_sigaction = &SwapHandler;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO | SA_RESTART;
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return sigaction(SIGSEGV, &sa, &old_sa_segv) == 0;
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}
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#else
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bool InitSwap() noexcept {
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return true;
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}
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#endif
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} // namespace Common
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