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PPU Analyzer: Clean addr_heap fron non-valid code

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Should speed up analysis in some cases.
This commit is contained in:
Elad 2025-01-31 14:38:19 +02:00
parent 86b7078464
commit 181c92a868
1 changed files with 52 additions and 3 deletions
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55
rpcs3/Emu/Cell/PPUAnalyser.cpp
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@ -566,6 +566,7 @@ bool ppu_module<lv2_obj>::analyse(u32 lib_toc, u32 entry, const u32 sec_end, con
std::vector<std::reference_wrapper<ppu_function_ext>> func_queue;
// Known references (within segs, addr and value alignment = 4)
// For seg0, must be valid code
std::set<u32> addr_heap;
if (entry)
@ -621,6 +622,49 @@ bool ppu_module<lv2_obj>::analyse(u32 lib_toc, u32 entry, const u32 sec_end, con
return true;
};
auto is_valid_code = [](std::span<const be_t<u32>> range, bool is_fixed_addr, u32 /*cia*/)
{
for (usz index = 0; index < std::min<usz>(range.size(), 10); index++)
{
const ppu_opcode_t op{+range[index]};
switch (g_ppu_itype.decode(op.opcode))
{
case ppu_itype::UNK:
{
return false;
}
case ppu_itype::BC:
case ppu_itype::B:
{
if (!is_fixed_addr && op.aa)
{
return false;
}
return true;
}
case ppu_itype::BCCTR:
case ppu_itype::BCLR:
{
if (op.opcode & 0xe000)
{
// Garbage filter
return false;
}
return true;
}
default:
{
continue;
}
}
}
return true;
};
// Register new function
auto add_func = [&](u32 addr, u32 toc, u32 caller) -> ppu_function_ext&
{
@ -713,6 +757,7 @@ bool ppu_module<lv2_obj>::analyse(u32 lib_toc, u32 entry, const u32 sec_end, con
};
// Find references indiscriminately
// For seg0, must be valid code
for (const auto& seg : segs)
{
if (seg.size < 4) continue;
@ -732,10 +777,15 @@ bool ppu_module<lv2_obj>::analyse(u32 lib_toc, u32 entry, const u32 sec_end, con
for (const auto& _seg : segs)
{
if (!_seg.addr) continue;
if (!_seg.size) continue;
if (value >= start && value < end)
{
if (is_valid_code({ ptr, ptr + (end - value) }, entry != 0, _ptr.addr()))
{
continue;
}
addr_heap.emplace(value);
break;
}
@ -1001,8 +1051,7 @@ bool ppu_module<lv2_obj>::analyse(u32 lib_toc, u32 entry, const u32 sec_end, con
if (target >= start && target < end && target != iaddr && target != iaddr + 4)
{
// TODO: Check full executability
if (s_ppu_itype.decode(get_ref<u32>(target)) != ppu_itype::UNK)
if (is_valid_code({ get_ptr<u32>(target), get_ptr<u32>(end - 4) }, entry != 0, target))
{
ppu_log.trace("Enqueued PPU function 0x%x using a caller at 0x%x", target, iaddr);
add_func(target, 0, 0);