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156 lines
4.1 KiB
156 lines
4.1 KiB
// 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 <ranges>
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#include <csignal>
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#include <boost/container/static_vector.hpp>
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#include <orbis/SystemService.h>
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typedef void (*SceKernelExceptionHandler)(int32_t, void*);
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extern "C" int32_t sceKernelInstallExceptionHandler(int32_t signum, SceKernelExceptionHandler handler);
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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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// sigaction(2) has a motherfucking bug on musl where the thing isnt even properly prefixed
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# undef sa_sigaction
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# define sa_sigaction __sa_handler.__sa_sigaction
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#endif
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namespace Common {
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#ifdef __OPENORBIS__
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namespace Orbis {
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struct Ucontext {
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struct Sigset {
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u64 bits[2];
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} uc_sigmask;
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int field1_0x10[12];
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struct Mcontext {
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u64 mc_onstack;
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u64 mc_rdi;
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u64 mc_rsi;
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u64 mc_rdx;
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u64 mc_rcx;
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u64 mc_r8;
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u64 mc_r9;
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u64 mc_rax;
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u64 mc_rbx;
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u64 mc_rbp;
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u64 mc_r10;
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u64 mc_r11;
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u64 mc_r12;
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u64 mc_r13;
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u64 mc_r14;
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u64 mc_r15;
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int mc_trapno;
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u16 mc_fs;
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u16 mc_gs;
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u64 mc_addr;
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int mc_flags;
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u16 mc_es;
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u16 mc_ds;
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u64 mc_err;
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u64 mc_rip;
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u64 mc_cs;
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u64 mc_rflags;
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u64 mc_rsp;
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u64 mc_ss;
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u64 mc_len;
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u64 mc_fpformat;
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u64 mc_ownedfp;
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u64 mc_lbrfrom;
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u64 mc_lbrto;
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u64 mc_aux1;
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u64 mc_aux2;
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u64 mc_fpstate[104];
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u64 mc_fsbase;
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u64 mc_gsbase;
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u64 mc_spare[6];
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} uc_mcontext;
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struct Ucontext* uc_link;
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struct ExStack {
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void* ss_sp;
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std::size_t ss_size;
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int ss_flags;
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int _align;
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} uc_stack;
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int uc_flags;
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int __spare[4];
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int field7_0x4f4[3];
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};
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}
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static boost::container::static_vector<std::pair<void*, size_t>, 16> swap_regions;
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static void SwapHandler(int sig, void* raw_context) {
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auto& mctx = ((Orbis::Ucontext*)raw_context)->uc_mcontext;
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if (std::ranges::find_if(swap_regions, [addr = mctx.mc_addr](auto const& e) {
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return uintptr_t(addr) >= uintptr_t(e.first) && uintptr_t(addr) < uintptr_t(e.first) + e.second;
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}) != swap_regions.end()) {
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size_t const page_size = 4096;
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size_t const page_mask = ~0xfff;
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// should replace the existing mapping... ugh
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void* aligned_addr = reinterpret_cast<void*>(uintptr_t(mctx.mc_addr) & page_mask);
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void* res = mmap(aligned_addr, page_size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
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ASSERT(res != MAP_FAILED);
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} else {
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LOG_ERROR(HW_Memory, "fault in addr {:#x}", mctx.mc_addr);
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sceSystemServiceLoadExec("EXIT", nullptr);
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}
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}
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void InitSwap() noexcept {
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sceKernelInstallExceptionHandler(SIGSEGV, &SwapHandler);
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}
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#else
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void InitSwap() noexcept {}
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#endif
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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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swap_regions.emplace_back(addr, size);
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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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} // namespace Common
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