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https://github.com/RPCS3/rpcs3.git
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Make it work with LLVM
Allow multiple entries for a single code.
This commit is contained in:
Eladash
Ivan
parent
f572e29a13
commit
7df093c94b
@ -703,8 +703,6 @@ static usz apply_modification(std::basic_string<u32>& applied, const patch_engin
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}
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case patch_type::code_alloc:
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{
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relocate_instructions_at = 0;
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const u32 out_branch = vm::try_get_addr(dst + (offset & -4)).first;
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// Allow only if points to a PPU executable instruction
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@ -715,6 +713,13 @@ static usz apply_modification(std::basic_string<u32>& applied, const patch_engin
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const u32 alloc_size = utils::align(static_cast<u32>(p.value.long_value + 1) * 4, 0x10000);
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// Check if should maybe reuse previous code cave allocation (0 size)
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if (alloc_size - 4 != 0)
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{
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// Nope
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relocate_instructions_at = 0;
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}
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// Always executable
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u64 flags = vm::alloc_executable | vm::alloc_unwritable;
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@ -738,7 +743,7 @@ static usz apply_modification(std::basic_string<u32>& applied, const patch_engin
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// Range allowed for absolute branches to operate at
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// It takes into account that we need to put a branch for return at the end of memory space
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const u32 addr = p.alloc_addr = alloc_map->alloc(alloc_size, nullptr, 0x10000, flags);
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const u32 addr = p.alloc_addr = (relocate_instructions_at ? relocate_instructions_at : alloc_map->alloc(alloc_size, nullptr, 0x10000, flags));
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if (!addr)
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{
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@ -751,8 +756,12 @@ static usz apply_modification(std::basic_string<u32>& applied, const patch_engin
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// NOP filled
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std::fill_n(vm::get_super_ptr<u32>(addr), p.value.long_value, 0x60000000);
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// Register code
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ppu_register_range(addr, alloc_size);
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// Check if already registered by previous code allocation
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if (relocate_instructions_at != addr)
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{
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// Register code
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ppu_register_range(addr, alloc_size);
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}
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resval = out_branch & -4;
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@ -772,8 +781,6 @@ static usz apply_modification(std::basic_string<u32>& applied, const patch_engin
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continue;
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}
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// Write address of the allocated memory to the code entry
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*vm::get_super_ptr<u32>(resval) = addr;
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relocate_instructions_at = addr;
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break;
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}
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@ -617,34 +617,20 @@ struct ppu_far_jumps_t
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bool with_toc;
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std::string module_name;
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ppu_intrp_func_t func;
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};
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ppu_far_jumps_t(int) noexcept {}
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std::unordered_map<u32, all_info_t> vals;
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::jit_runtime rt;
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mutable shared_mutex mutex;
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// Get target address, 'ppu' is used in ppu_far_jump in order to modify registers
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u32 get_target(const u32 pc, ppu_thread* ppu = nullptr)
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{
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reader_lock lock(mutex);
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if (auto it = vals.find(pc); it != vals.end())
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u32 get_target(u32 pc, ppu_thread* ppu = nullptr) const
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{
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all_info_t& all_info = it->second;
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u32 target = all_info.target;
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u32 direct_target = this->target;
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bool link = all_info.link;
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bool from_opd = all_info.with_toc;
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bool to_link = this->link;
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bool from_opd = this->with_toc;
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if (!all_info.module_name.empty())
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if (!this->module_name.empty())
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{
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target = ppu_get_exported_func_addr(target, all_info.module_name);
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direct_target = ppu_get_exported_func_addr(direct_target, this->module_name);
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}
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if (from_opd && !vm::check_addr<sizeof(ppu_func_opd_t)>(target))
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if (from_opd && !vm::check_addr<sizeof(ppu_func_opd_t)>(direct_target))
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{
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// Avoid reading unmapped memory under mutex
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from_opd = false;
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@ -652,11 +638,11 @@ struct ppu_far_jumps_t
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if (from_opd)
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{
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auto& opd = vm::_ref<ppu_func_opd_t>(target);
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target = opd.addr;
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auto& opd = vm::_ref<ppu_func_opd_t>(direct_target);
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direct_target = opd.addr;
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// We modify LR to custom values here
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link = false;
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to_link = false;
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if (ppu)
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{
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@ -670,20 +656,71 @@ struct ppu_far_jumps_t
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saved_info.saved_lr = std::exchange(ppu->lr, g_fxo->get<ppu_function_manager>().func_addr(FIND_FUNC(ppu_return_from_far_jump), true));
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saved_info.saved_r2 = std::exchange(ppu->gpr[2], opd.rtoc);
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}
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}
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if (link && ppu)
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if (to_link && ppu)
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{
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ppu->lr = pc + 4;
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}
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return target;
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return direct_target;
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}
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};
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ppu_far_jumps_t(int) noexcept {}
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std::map<u32, all_info_t> vals;
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::jit_runtime rt;
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mutable shared_mutex mutex;
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// Get target address, 'ppu' is used in ppu_far_jump in order to modify registers
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u32 get_target(u32 pc, ppu_thread* ppu = nullptr)
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{
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reader_lock lock(mutex);
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if (auto it = vals.find(pc); it != vals.end())
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{
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all_info_t& all_info = it->second;
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return all_info.get_target(pc, ppu);
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}
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return {};
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}
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// Get function patches in range (entry -> target)
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std::vector<std::pair<u32, u32>> get_targets(u32 pc, u32 size)
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{
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std::vector<std::pair<u32, u32>> targets;
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reader_lock lock(mutex);
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auto it = vals.lower_bound(pc);
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if (it == vals.end())
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{
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return targets;
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}
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if (it->first >= pc + size)
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{
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return targets;
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}
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for (auto end = vals.lower_bound(pc + size); it != end; it++)
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{
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all_info_t& all_info = it->second;
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if (u32 target = all_info.get_target(it->first))
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{
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targets.emplace_back(it->first, target);
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}
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}
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return targets;
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}
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// Generate a mini-function which updates PC (for LLVM) and jumps to ppu_far_jump to handle redirections
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template <bool Locked = true>
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ppu_intrp_func_t gen_jump(u32 pc)
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{
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@ -1019,7 +1056,7 @@ void ppu_thread::dump_regs(std::string& ret) const
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if (const_value != reg)
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{
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// Expectation of pretictable code path has not been met (such as a branch directly to the instruction)
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// Expectation of predictable code path has not been met (such as a branch directly to the instruction)
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is_const = false;
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}
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@ -3478,14 +3515,25 @@ bool ppu_initialize(const ppu_module& info, bool check_only)
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}
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}
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if (jit)
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if (g_fxo->is_init<ppu_far_jumps_t>())
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{
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const auto far_jump = ppu_get_far_jump(func.addr) ? g_fxo->get<ppu_far_jumps_t>().gen_jump(func.addr) : nullptr;
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auto targets = g_fxo->get<ppu_far_jumps_t>().get_targets(func.addr, func.size);
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if (far_jump)
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for (auto [source, target] : targets)
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{
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auto far_jump = ensure(g_fxo->get<ppu_far_jumps_t>().gen_jump(source));
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if (source == func.addr && jit)
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{
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jit->update_global_mapping(fmt::format("__0x%x", func.addr - reloc), reinterpret_cast<u64>(far_jump));
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}
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ppu_register_function_at(source, 4, far_jump);
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}
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if (!targets.empty())
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{
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// Replace the function with ppu_far_jump
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jit->update_global_mapping(fmt::format("__0x%x", func.addr - reloc), reinterpret_cast<u64>(far_jump));
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fpos++;
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continue;
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}
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