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SPU analyzer: Detect 'argument passing' block before the function

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Eladash 2024-03-07 17:52:46 +02:00 • committed by Elad.Ash
parent ea0545779a
commit 45863bc7c5
1 changed files with 48 additions and 0 deletions
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48
rpcs3/Emu/Cell/SPUCommonRecompiler.cpp
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@ -2304,6 +2304,49 @@ std::vector<u32> spu_thread::discover_functions(u32 base_addr, std::span<const u
} }
addrs.push_back(func); addrs.push_back(func);
// Detect an "arguments passing" block, possible queue another function
for (u32 next = func, it = 10; it && next >= base_addr && next < std::min<u32>(base_addr + ::size32(ls), 0x3FFF0); it--, next += 4)
{
const spu_opcode_t test_op{read_from_ptr<be_t<u32>>(ls, next - base_addr)};
const auto type = g_spu_itype.decode(test_op.opcode);
if (type & spu_itype::branch && type != spu_itype::BR)
{
break;
}
if (type == spu_itype::UNK || !test_op.opcode)
{
break;
}
if (type != spu_itype::BR)
{
continue;
}
const u32 target = op_branch_targets(next, op)[0];
if (target == umax || addr + 4 == target || target == addr || std::count(addrs.begin(), addrs.end(), target))
{
break;
}
// Detect backwards branch to the block in examination
if (target >= func && target <= next)
{
break;
}
if (!is_exec_code(target, ls, base_addr, true))
{
break;
}
addrs.push_back(target);
break;
}
} }
for (u32 addr : branches) for (u32 addr : branches)
@ -2329,6 +2372,11 @@ std::vector<u32> spu_thread::discover_functions(u32 base_addr, std::span<const u
break; break;
} }
if (type == spu_itype::UNK || !test_op.opcode)
{
break;
}
bool is_func = false; bool is_func = false;
if (type == spu_itype::AI && test_op.rt == 1u && test_op.ra == 1u) if (type == spu_itype::AI && test_op.rt == 1u && test_op.ra == 1u)