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cpu_patches: Patch just-in-time using signal handlers. (#852)

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* cpu_patches: Patch just-in-time using illegal instruction handler.

* core: Add common signal dispatch system and use for on-demand TCB patches.

* page_manager: Re-add userfaultfd implementation.
This commit is contained in:
squidbus
2024-09-15 13:48:34 -07:00
committed by GitHub
parent b09b28c7f3
commit 75a4df53a5
7 changed files with 404 additions and 143 deletions
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7
src/core/module.cpp
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@@ -1,7 +1,6 @@
// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <xbyak/xbyak.h>
#include "common/alignment.h"
#include "common/arch.h"
#include "common/assert.h"
@@ -92,9 +91,11 @@ void Module::LoadModuleToMemory(u32& max_tls_index) {
LoadOffset += CODE_BASE_INCR * (1 + aligned_base_size / CODE_BASE_INCR);
LOG_INFO(Core_Linker, "Loading module {} to {}", name, fmt::ptr(*out_addr));
#ifdef ARCH_X86_64
// Initialize trampoline generator.
void* trampoline_addr = std::bit_cast<void*>(base_virtual_addr + aligned_base_size);
Xbyak::CodeGenerator c(TrampolineSize, trampoline_addr);
RegisterPatchModule(*out_addr, aligned_base_size, trampoline_addr, TrampolineSize);
#endif
LOG_INFO(Core_Linker, "======== Load Module to Memory ========");
LOG_INFO(Core_Linker, "base_virtual_addr ......: {:#018x}", base_virtual_addr);
@@ -135,7 +136,7 @@ void Module::LoadModuleToMemory(u32& max_tls_index) {
add_segment(elf_pheader[i]);
#ifdef ARCH_X86_64
if (elf_pheader[i].p_flags & PF_EXEC) {
PatchInstructions(segment_addr, segment_file_size, c);
PrePatchInstructions(segment_addr, segment_file_size);
}
#endif
break;