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PPU analyser improved

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This commit is contained in:
Nekotekina 2017-02-12 21:12:08 +03:00
parent 177084b1f4
commit f4b95c0226
5 changed files with 153 additions and 18 deletions
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147
rpcs3/Emu/Cell/PPUAnalyser.cpp
View File

@ -60,7 +60,7 @@ void ppu_validate(const std::string& fname, const std::vector<ppu_function>& fun
while (addr > found && index + 1 < funcs.size())
{
LOG_ERROR(LOADER, "%s.yml : validation failed at 0x%x (0x%x, 0x%x)", fname, found, addr, size);
LOG_WARNING(LOADER, "%s.yml : unexpected function at 0x%x (0x%x, 0x%x)", fname, found, addr, size);
index++;
found = funcs[index].addr - reloc;
}
@ -71,14 +71,12 @@ void ppu_validate(const std::string& fname, const std::vector<ppu_function>& fun
continue;
}
if (size && size < funcs[index].size)
if (size && size != funcs[index].size)
{
LOG_ERROR(LOADER, "%s.yml : function size mismatch at 0x%x(size=0x%x) (0x%x, 0x%x)", fname, found, funcs[index].size, addr, size);
}
if (size > funcs[index].size)
{
LOG_ERROR(LOADER, "%s.yml : function size mismatch at 0x%x(size=0x%x) (0x%x, 0x%x)", fname, found, funcs[index].size, addr, size);
if (size + 4 != funcs[index].size || vm::read32(addr + size) != ppu_instructions::NOP())
{
LOG_ERROR(LOADER, "%s.yml : function size mismatch at 0x%x(size=0x%x) (0x%x, 0x%x)", fname, found, funcs[index].size, addr, size);
}
}
index++;
@ -631,6 +629,34 @@ std::vector<ppu_function> ppu_analyse(const std::vector<std::pair<u32, u32>>& se
}
}
if (ptr + 0x4 <= fend &&
(ptr[0] & 0xffff0000) == LIS(r11, 0) &&
(ptr[1] & 0xffff0000) == ADDI(r11, r11, 0) &&
ptr[2] == MTCTR(r11) &&
ptr[3] == BCTR())
{
// Simple gate
const u32 target = (ptr[0] << 16) + ppu_opcode_t{ptr[1]}.simm16;
if (target >= start && target < end)
{
auto& new_func = add_func(target, func.toc, func.addr);
if (new_func.blocks.empty())
{
func_queue.emplace_back(func);
continue;
}
func.size = 0x10;
func.blocks.emplace(func.addr, func.size);
func.attr += new_func.attr & ppu_attr::no_return;
func.called_from.emplace(target);
func.gate_target = target;
continue;
}
}
if (ptr + 4 <= fend &&
ptr[0] == STD(r2, r1, 0x28) &&
(ptr[1] & 0xffff0000) == ADDIS(r2, r2, {}) &&
@ -663,6 +689,7 @@ std::vector<ppu_function> ppu_analyse(const std::vector<std::pair<u32, u32>>& se
}
if (ptr + 8 <= fend &&
(ptr[0] == STD(r2, r1, 0x28) && (ptr[1] & 0xfc000000) == HACK(0) && ptr[2] == BLR() ||
(ptr[0] & 0xffff0000) == LI(r12, 0) &&
(ptr[1] & 0xffff0000) == ORIS(r12, r12, 0) &&
(ptr[2] & 0xffff0000) == LWZ(r12, r12, 0) &&
@ -670,13 +697,48 @@ std::vector<ppu_function> ppu_analyse(const std::vector<std::pair<u32, u32>>& se
ptr[4] == LWZ(r0, r12, 0) &&
ptr[5] == LWZ(r2, r12, 4) &&
ptr[6] == MTCTR(r0) &&
ptr[7] == BCTR())
ptr[7] == BCTR()))
{
// The most used simple import stub
func.size = 0x20;
func.blocks.emplace(func.addr, func.size);
func.attr += ppu_attr::known_addr;
func.attr += ppu_attr::known_size;
// Look for another imports to fill gaps (hack)
auto p2 = ptr + 8;
while (p2 + 8 <= fend &&
(p2[0] == STD(r2, r1, 0x28) && (p2[1] & 0xfc000000) == HACK(0) && p2[2] == BLR() ||
(p2[0] & 0xffff0000) == LI(r12, 0) &&
(p2[1] & 0xffff0000) == ORIS(r12, r12, 0) &&
(p2[2] & 0xffff0000) == LWZ(r12, r12, 0) &&
p2[3] == STD(r2, r1, 0x28) &&
p2[4] == LWZ(r0, r12, 0) &&
p2[5] == LWZ(r2, r12, 4) &&
p2[6] == MTCTR(r0) &&
p2[7] == BCTR()))
{
auto& next = add_func(p2.addr(), 0, func.addr);
next.size = 0x20;
next.blocks.emplace(next.addr, next.size);
next.attr += ppu_attr::known_addr;
next.attr += ppu_attr::known_size;
p2 += 8;
}
continue;
}
if (ptr + 3 <= fend &&
ptr[0] == 0x7c0004ac &&
ptr[1] == 0x00000000 &&
ptr[2] == BLR())
{
// Weird function (illegal instruction)
func.size = 0xc;
func.blocks.emplace(func.addr, func.size);
//func.attr += ppu_attr::no_return;
continue;
}
@ -884,6 +946,11 @@ std::vector<ppu_function> ppu_analyse(const std::vector<std::pair<u32, u32>>& se
block.second = _ptr.addr() - block.first;
break;
}
else if (op.opcode == ppu_instructions::TRAP())
{
block.second = _ptr.addr() - block.first;
break;
}
}
}
@ -997,6 +1064,68 @@ std::vector<ppu_function> ppu_analyse(const std::vector<std::pair<u32, u32>>& se
}
}
}
// Suspicious block start
u32 start = func.addr + func.size;
if (next == end)
{
continue;
}
// Analyse gaps between functions
for (vm::cptr<u32> _ptr = vm::cast(start); _ptr.addr() < next;)
{
const u32 addr = _ptr.addr();
const ppu_opcode_t op{*_ptr++};
const ppu_itype::type type = s_ppu_itype.decode(op.opcode);
if (type == ppu_itype::UNK)
{
break;
}
else if (addr == start && op.opcode == ppu_instructions::NOP())
{
if (start == func.addr + func.size)
{
// Extend function with tail NOPs (hack)
func.size += 4;
}
start += 4;
continue;
}
else if (type == ppu_itype::SC && op.opcode != ppu_instructions::SC(0))
{
break;
}
else if (addr == start && op.opcode == ppu_instructions::BLR())
{
start += 4;
continue;
}
else if (type == ppu_itype::B || type == ppu_itype::BC)
{
const u32 target = (op.aa ? 0 : addr) + (type == ppu_itype::B ? +op.bt24 : +op.bt14);
if (target == addr)
{
break;
}
_ptr.set(next);
}
else if (type == ppu_itype::BCLR || type == ppu_itype::BCCTR)
{
_ptr.set(next);
}
if (_ptr.addr() >= next)
{
LOG_WARNING(PPU, "Function gap: [0x%x] 0x%x bytes at 0x%x", func.addr, next - start, start);
break;
}
}
}
// Convert map to vector (destructive)

9
rpcs3/Emu/Cell/PPUDisAsm.cpp
View File

@ -899,13 +899,12 @@ void PPUDisAsm::HACK(ppu_opcode_t op)
void PPUDisAsm::SC(ppu_opcode_t op)
{
switch (op.lev)
if (op.opcode != ppu_instructions::SC(0))
{
case 0x0: Write("sc"); break;
case 0x1: Write("HyperCall LV1"); break;
case 0x3: Write("fast_stop()"); break; // hack
default: Write(fmt::format("Unknown sc: 0x%x", op.lev));
return UNK(op);
}
Write("sc");
}
void PPUDisAsm::B(ppu_opcode_t op)

6
rpcs3/Emu/Cell/PPUInterpreter.cpp
View File

@ -1944,12 +1944,12 @@ bool ppu_interpreter::HACK(ppu_thread& ppu, ppu_opcode_t op)
bool ppu_interpreter::SC(ppu_thread& ppu, ppu_opcode_t op)
{
switch (u32 lv = op.lev)
if (op.opcode != ppu_instructions::SC(0))
{
case 0x0: ppu_execute_syscall(ppu, ppu.gpr[11]); break;
default: fmt::throw_exception("SC lv%u", lv);
return UNK(ppu, op);
}
ppu_execute_syscall(ppu, ppu.gpr[11]);
return true;
}

2
rpcs3/Emu/Cell/PPUOpcodes.h
View File

@ -643,6 +643,8 @@ namespace ppu_instructions
inline u32 EXTRDI(u32 x, u32 y, u32 n, u32 b) { return RLDICL(x, y, b + n, 64 - b, false); }
inline u32 SRDI(u32 x, u32 y, u32 n) { return RLDICL(x, y, 64 - n, n, false); }
inline u32 CLRLDI(u32 x, u32 y, u32 n) { return RLDICL(x, y, 0, n, false); }
inline u32 TRAP() { return 0x7FE00008; } // tw 31,r0,r0
}
using namespace implicts;

7
rpcs3/Emu/Cell/PPUTranslator.cpp
View File

@ -1758,7 +1758,12 @@ void PPUTranslator::HACK(ppu_opcode_t op)
void PPUTranslator::SC(ppu_opcode_t op)
{
Call(GetType<void>(), fmt::format(op.lev == 0 ? "__syscall" : "__lv%ucall", +op.lev), m_thread, m_ir->CreateLoad(m_gpr[11]));
if (op.opcode != ppu_instructions::SC(0) && op.opcode != ppu_instructions::SC(1))
{
return UNK(op);
}
Call(GetType<void>(), op.lev ? "__lv1call" : "__syscall", m_thread, m_ir->CreateLoad(m_gpr[11]));
UndefineVolatileRegisters();
}