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PPUAnalyser.cpp
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PPUAnalyser.cpp
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#include "stdafx.h"
#include "PPUAnalyser.h"
#include "PPUOpcodes.h"
#include "PPUModule.h"
#include <unordered_set>
#include "util/yaml.hpp"
#include "Utilities/asm.h"
LOG_CHANNEL(ppu_validator);
constexpr ppu_decoder<ppu_itype> s_ppu_itype;
template<>
void fmt_class_string<ppu_attr>::format(std::string& out, u64 arg)
{
format_enum(out, arg, [](ppu_attr value)
{
switch (value)
{
case ppu_attr::known_addr: return "known_addr";
case ppu_attr::known_size: return "known_size";
case ppu_attr::no_return: return "no_return";
case ppu_attr::no_size: return "no_size";
case ppu_attr::__bitset_enum_max: break;
}
return unknown;
});
}
template<>
void fmt_class_string<bs_t<ppu_attr>>::format(std::string& out, u64 arg)
{
format_bitset(out, arg, "[", ",", "]", &fmt_class_string<ppu_attr>::format);
}
void ppu_module::validate(u32 reloc)
{
// Load custom PRX configuration if available
if (fs::file yml{path + ".yml"})
{
const auto [cfg, error] = yaml_load(yml.to_string());
if (!error.empty())
{
ppu_validator.error("Failed to load %s.yml: %s", path, error);
return;
}
u32 index = 0;
// Validate detected functions using information provided
for (const auto func : cfg["functions"])
{
const u32 addr = func["addr"].as<u32>(-1);
const u32 size = func["size"].as<u32>(0);
if (addr != umax && index < funcs.size())
{
u32 found = funcs[index].addr - reloc;
while (addr > found && index + 1 < funcs.size())
{
ppu_validator.warning("%s.yml : unexpected function at 0x%x (0x%x, 0x%x)", path, found, addr, size);
index++;
found = funcs[index].addr - reloc;
}
if (addr < found)
{
ppu_validator.error("%s.yml : function not found (0x%x, 0x%x)", path, addr, size);
continue;
}
if (size && size != funcs[index].size)
{
if (size + 4 != funcs[index].size || vm::read32(addr + size) != ppu_instructions::NOP())
{
ppu_validator.error("%s.yml : function size mismatch at 0x%x(size=0x%x) (0x%x, 0x%x)", path, found, funcs[index].size, addr, size);
}
}
index++;
}
else
{
ppu_validator.error("%s.yml : function not found at the end (0x%x, 0x%x)", path, addr, size);
break;
}
}
if (!index)
{
return; // ???
}
while (index < funcs.size())
{
if (funcs[index].size)
{
ppu_validator.error("%s.yml : function not covered at 0x%x (size=0x%x)", path, funcs[index].addr, funcs[index].size);
}
index++;
}
ppu_validator.success("%s.yml : validation completed", path);
}
}
static u32 ppu_test(const vm::cptr<u32> ptr, vm::cptr<void> fend, ppu_pattern_array pat)
{
vm::cptr<u32> cur = ptr;
for (auto& p : pat)
{
if (cur >= fend)
{
return 0;
}
if (*cur == ppu_instructions::NOP())
{
cur++;
if (cur >= fend)
{
return 0;
}
}
if ((*cur & p.mask) != p.opcode)
{
return 0;
}
cur++;
}
return cur.addr() - ptr.addr();
}
static u32 ppu_test(vm::cptr<u32> ptr, vm::cptr<void> fend, ppu_pattern_matrix pats)
{
for (auto pat : pats)
{
if (const u32 len = ppu_test(ptr, fend, pat))
{
return len;
}
}
return 0;
}
namespace ppu_patterns
{
using namespace ppu_instructions;
const ppu_pattern abort1[]
{
{ STDU(r1, r1, -0xc0) },
{ MFLR(r0) },
{ STD(r26, r1, 0x90) },
{ STD(r27, r1, 0x98) },
{ STD(r28, r1, 0xa0) },
{ STD(r29, r1, 0xa8) },
{ STD(r30, r1, 0xb0) },
{ STD(r31, r1, 0xb8) },
{ STD(r0, r1, 0xd0) },
{ LI(r3, 4) },
{ LI(r4, 0) },
{ LI(r11, 0x3dc) },
{ SC(0) },
{ MR(r29, r1) },
{ CLRLDI(r29, r29, 32) },
{ LWZ(r4, r2, 0), 0xffff },
{ ADDI(r31, r1, 0x70) },
{ LI(r3, 1) },
{ LI(r5, 0x19) },
{ MR(r6, r31) },
{ LWZ(r28, r29, 4) },
{ LI(r11, 0x193) },
{ SC(0) },
{ ADDI(r26, r1, 0x78) },
{ LD(r3, r28, 0x10) },
{ MR(r4, r26) },
{ B(0, false, true), 0x3fffffc }, // .hex2str
{ LI(r5, 0x10) },
{ CLRLDI(r4, r3, 32) },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LWZ(r27, r2, 0), 0xffff },
{ LI(r3, 1) },
{ LI(r5, 1) },
{ MR(r4, r27) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LD(r28, r28, 0) },
{ CMPDI(cr7, r28, 0) },
{ BEQ(cr7, +0x6c) },
{ LWZ(r30, r2, 0), 0xffff },
{ LI(r3, 1) },
{ MR(r4, r30) },
{ LI(r5, 0x19) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ CLRLDI(r29, r28, 32) },
{ CLRLDI(r4, r26, 32) },
{ LD(r3, r29, 0x10) },
{ 0, 0xffffffff }, // .hex2str
{ LI(r5, 0x10) },
{ CLRLDI(r4, r3, 32) },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LI(r3, 1) },
{ MR(r4, r27) },
{ LI(r5, 1) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LD(r28, r29, 0) },
{ CMPDI(cr7, r28, 0) },
{ BNE(cr7, -0x60) },
{ LWZ(r4, r2, 0), 0xffff },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r5, 0x27) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LI(r3, 1) },
{ B(0, false, true), 0x3fffffc }, // .sys_process_exit
{ LD(r2, r1, 0x28) },
{ LI(r3, 1) },
{ B(0, false, true), 0x3fffffc }, // .exit
};
const ppu_pattern abort2[]
{
{ STDU(r1, r1, -0xc0) },
{ MFLR(r0) },
{ STD(r27, r1, 0x98) },
{ STD(r28, r1, 0xa0) },
{ STD(r29, r1, 0xa8) },
{ STD(r30, r1, 0xb0) },
{ STD(r31, r1, 0xb8) },
{ STD(r0, r1, 0xd0) },
{ MR(r9, r1) },
{ CLRLDI(r9, r9, 32) },
{ LWZ(r4, r2, 0), 0xffff },
{ ADDI(r31, r1, 0x70) },
{ LI(r3, 1) },
{ LI(r5, 0x19) },
{ MR(r6, r31) },
{ LWZ(r29, r9, 4) },
{ LI(r11, 0x193) },
{ SC(0) },
{ ADDI(r27, r1, 0x78) },
{ LD(r3, r29, 0x10) },
{ MR(r4, r27) },
{ B(0, false, true), 0x3fffffc }, // .hex2str
{ LI(r5, 0x10) },
{ CLRLDI(r4, r3, 32) },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LWZ(r28, r2, 0), 0xffff },
{ LI(r3, 1) },
{ LI(r5, 1) },
{ MR(r4, r28) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LD(r29, r29, 0) },
{ CMPDI(cr7, r29, 0) },
{ BEQ(cr7, +0x6c) },
{ LWZ(r30, r2, 0), 0xffff },
{ LI(r3, 1) },
{ MR(r4, r30) },
{ LI(r5, 0x19) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ CLRLDI(r29, r29, 32) },
{ CLRLDI(r4, r27, 32) },
{ LD(r3, r29, 0x10) },
{ 0, 0xffffffff }, // .hex2str
{ LI(r5, 0x10) },
{ CLRLDI(r4, r3, 32) },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LI(r3, 1) },
{ MR(r4, r28) },
{ LI(r5, 1) },
{ MR(r6, r31) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LD(r29, r29, 0) },
{ CMPDI(cr7, r29, 0) },
{ BNE(cr7, -0x60) },
{ LWZ(r4, r2, 0), 0xffff },
{ MR(r6, r31) },
{ LI(r3, 1) },
{ LI(r5, 0x27) },
{ LI(r11, 0x193) },
{ SC(0) },
{ LI(r3, 1) },
{ B(0, false, true), 0x3fffffc }, // .sys_process_exit
{ LD(r2, r1, 0x28) },
{ LI(r3, 1) },
{ B(0, false, true), 0x3fffffc }, // .exit
};
const ppu_pattern_array abort[]
{
abort1,
abort2,
};
const ppu_pattern get_context[]
{
ADDI(r3, r3, 0xf),
CLRRDI(r3, r3, 4),
STD(r1, r3, 0),
STD(r2, r3, 8),
STD(r14, r3, 0x18),
STD(r15, r3, 0x20),
STD(r16, r3, 0x28),
STD(r17, r3, 0x30),
STD(r18, r3, 0x38),
STD(r19, r3, 0x40),
STD(r20, r3, 0x48),
STD(r21, r3, 0x50),
STD(r22, r3, 0x58),
STD(r23, r3, 0x60),
STD(r24, r3, 0x68),
STD(r25, r3, 0x70),
STD(r26, r3, 0x78),
STD(r27, r3, 0x80),
STD(r28, r3, 0x88),
STD(r29, r3, 0x90),
STD(r30, r3, 0x98),
STD(r31, r3, 0xa0),
MFLR(r0),
STD(r0, r3, 0xa8),
0x7c000026, // mfcr r0
STD(r0, r3, 0xb0),
STFD(f14, r3, 0xb8),
STFD(f15, r3, 0xc0),
STFD(F16, r3, 0xc8),
STFD(f17, r3, 0xd0),
STFD(f18, r3, 0xd8),
STFD(f19, r3, 0xe0),
STFD(f20, r3, 0xe8),
STFD(f21, r3, 0xf0),
STFD(f22, r3, 0xf8),
STFD(f23, r3, 0x100),
STFD(f24, r3, 0x108),
STFD(f25, r3, 0x110),
STFD(f26, r3, 0x118),
STFD(f27, r3, 0x120),
STFD(f28, r3, 0x128),
STFD(f29, r3, 0x130),
STFD(f30, r3, 0x138),
STFD(f31, r3, 0x140),
0x7c0042A6, // mfspr r0, vrsave
STD(r0, r3, 0x148),
ADDI(r4, r3, 0x150),
ADDI(r5, r3, 0x160),
ADDI(r6, r3, 0x170),
ADDI(r7, r3, 0x180),
STVX(v20, r0, r4),
STVX(v21, r0, r5),
STVX(v22, r0, r6),
STVX(v23, r0, r7),
ADDI(r4, r4, 0x40),
ADDI(r5, r5, 0x40),
ADDI(r6, r6, 0x40),
ADDI(r7, r7, 0x40),
STVX(v24, r0, r4),
STVX(v25, r0, r5),
STVX(v26, r0, r6),
STVX(v27, r0, r7),
ADDI(r4, r4, 0x40),
ADDI(r5, r5, 0x40),
ADDI(r6, r6, 0x40),
ADDI(r7, r7, 0x40),
STVX(v28, r0, r4),
STVX(v29, r0, r5),
STVX(v30, r0, r6),
STVX(v31, r0, r7),
LI(r3, 0),
BLR(),
};
const ppu_pattern set_context[]
{
ADDI(r3, r3, 0xf),
CLRRDI(r3, r3, 4),
LD(r1, r3, 0),
LD(r2, r3, 8),
LD(r14, r3, 0x18),
LD(r15, r3, 0x20),
LD(r16, r3, 0x28),
LD(r17, r3, 0x30),
LD(r18, r3, 0x38),
LD(r19, r3, 0x40),
LD(r20, r3, 0x48),
LD(r21, r3, 0x50),
LD(r22, r3, 0x58),
LD(r23, r3, 0x60),
LD(r24, r3, 0x68),
LD(r25, r3, 0x70),
LD(r26, r3, 0x78),
LD(r27, r3, 0x80),
LD(r28, r3, 0x88),
LD(r29, r3, 0x90),
LD(r30, r3, 0x98),
LD(r31, r3, 0xa0),
LD(r0, r3, 0xa8),
MTLR(r0),
LD(r0, r3, 0xb0),
0x7c101120, // mtocrf 1, r0
0x7c102120, // mtocrf 2, r0
0x7c104120, // mtocrf 4, r0
0x7c108120, // mtocrf 8, r0
0x7c110120, // mtocrf 0x10, r0
0x7c120120, // mtocrf 0x20, r0
0x7c140120, // mtocrf 0x40, r0
0x7c180120, // mtocrf 0x80, r0
LFD(f14, r3, 0xb8),
LFD(f15, r3, 0xc0),
LFD(F16, r3, 0xc8),
LFD(f17, r3, 0xd0),
LFD(f18, r3, 0xd8),
LFD(f19, r3, 0xe0),
LFD(f20, r3, 0xe8),
LFD(f21, r3, 0xf0),
LFD(f22, r3, 0xf8),
LFD(f23, r3, 0x100),
LFD(f24, r3, 0x108),
LFD(f25, r3, 0x110),
LFD(f26, r3, 0x118),
LFD(f27, r3, 0x120),
LFD(f28, r3, 0x128),
LFD(f29, r3, 0x130),
LFD(f30, r3, 0x138),
LFD(f31, r3, 0x140),
LD(r0, r3, 0x148),
0x7c0043A6, //mtspr vrsave, r0
ADDI(r5, r3, 0x150),
ADDI(r6, r3, 0x160),
ADDI(r7, r3, 0x170),
ADDI(r8, r3, 0x180),
LVX(v20, r0, r5),
LVX(v21, r0, r6),
LVX(v22, r0, r7),
LVX(v23, r0, r8),
ADDI(r5, r5, 0x40),
ADDI(r6, r6, 0x40),
ADDI(r7, r7, 0x40),
ADDI(r8, r8, 0x40),
LVX(v24, r0, r5),
LVX(v25, r0, r6),
LVX(v26, r0, r7),
LVX(v27, r0, r8),
ADDI(r5, r5, 0x40),
ADDI(r6, r6, 0x40),
ADDI(r7, r7, 0x40),
ADDI(r8, r8, 0x40),
LVX(v28, r0, r5),
LVX(v29, r0, r6),
LVX(v30, r0, r7),
LVX(v31, r0, r8),
LI(r3, 0),
0x7c041810, // subfc r0, r4, r3
0x7c640194, // addze r3, r4
BLR(),
};
const ppu_pattern x26c[]
{
LI(r9, 0),
STD(r9, r6, 0),
MR(r1, r6),
STDU(r1, r1, -0x70),
STD(r9, r1, 0),
CLRLDI(r7, r3, 32),
LWZ(r0, r7, 0),
MTCTR(r0),
LWZ(r2, r7, 4),
MR(r3, r4),
MR(r4, r5),
BCTRL(),
};
const ppu_pattern x2a0[]
{
MR(r8, r1),
0x7d212850, // subf r9, r1, r5
0x7c21496a, // stdux r1, r1, r9
MFLR(r0),
STD(r0, r8, 0x10),
STD(r2, r1, 0x28),
CLRLDI(r7, r3, 32),
LWZ(r0, r7, 0),
MTCTR(r0),
LWZ(r2, r7, 4),
MR(r3, r4),
BCTRL(),
LD(r2, r1, 0x28),
LD(r9, r1, 0x0),
LD(r0, r9, 0x10),
MTLR(r0),
MR(r1, r9),
BLR(),
};
}
void ppu_module::analyse(u32 lib_toc, u32 entry)
{
// Assume first segment is executable
const u32 start = segs[0].addr;
const u32 end = segs[0].addr + segs[0].size;
// Known TOCs (usually only 1)
std::unordered_set<u32> TOCs;
// Known functions
std::map<u32, ppu_function> fmap;
std::set<u32> known_functions;
// Function analysis workload
std::vector<std::reference_wrapper<ppu_function>> func_queue;
// Known references (within segs, addr and value alignment = 4)
std::set<u32> addr_heap{entry};
// Register new function
auto add_func = [&](u32 addr, u32 toc, u32 caller) -> ppu_function&
{
ppu_function& func = fmap[addr];
if (caller)
{
// Register caller
func.callers.emplace(caller);
}
if (func.addr)
{
if (toc && func.toc && func.toc != umax && func.toc != toc)
{
func.toc = -1;
}
else if (toc && func.toc == 0)
{
// Must then update TOC recursively
func.toc = toc;
func_queue.emplace_back(func);
}
return func;
}
func_queue.emplace_back(func);
func.addr = addr;
func.toc = toc;
func.name = fmt::format("__0x%x", func.addr);
ppu_log.trace("Function 0x%x added (toc=0x%x)", addr, toc);
return func;
};
// Register new TOC and find basic set of functions
auto add_toc = [&](u32 toc)
{
if (!toc || toc == umax || !TOCs.emplace(toc).second)
{
return;
}
// Grope for OPD section (TODO: optimization, better constraints)
for (const auto& seg : segs)
{
for (vm::cptr<u32> ptr = vm::cast(seg.addr); ptr.addr() < seg.addr + seg.size; ptr++)
{
if (ptr[0] >= start && ptr[0] < end && ptr[0] % 4 == 0 && ptr[1] == toc)
{
// New function
ppu_log.trace("OPD*: [0x%x] 0x%x (TOC=0x%x)", ptr, ptr[0], ptr[1]);
add_func(*ptr, addr_heap.count(ptr.addr()) ? toc : 0, 0);
ptr++;
}
}
}
};
// Get next reliable function address
auto get_limit = [&](u32 addr) -> u32
{
auto it = known_functions.lower_bound(addr);
return it == known_functions.end() ? end : *it;
};
// Find references indiscriminately
for (const auto& seg : segs)
{
for (vm::cptr<u32> ptr = vm::cast(seg.addr); ptr.addr() < seg.addr + seg.size; ptr++)
{
const u32 value = *ptr;
if (value % 4)
{
continue;
}
for (const auto& _seg : segs)
{
if (value >= _seg.addr && value < _seg.addr + _seg.size)
{
addr_heap.emplace(value);
break;
}
}
}
}
// Find OPD section
for (const auto& sec : secs)
{
vm::cptr<void> sec_end = vm::cast(sec.addr + sec.size);
// Probe
for (vm::cptr<u32> ptr = vm::cast(sec.addr); ptr < sec_end; ptr += 2)
{
if (ptr + 6 <= sec_end && !ptr[0] && !ptr[2] && ptr[1] == ptr[4] && ptr[3] == ptr[5])
{
// Special OPD format case (some homebrews)
ptr += 4;
}
if (ptr + 2 > sec_end)
{
sec_end.set(0);
break;
}
const u32 addr = ptr[0];
const u32 _toc = ptr[1];
// Rough Table of Contents borders
const u32 _toc_begin = _toc - 0x8000;
const u32 _toc_end = _toc + 0x8000;
// TODO: improve TOC constraints
if (_toc % 4 || !vm::check_addr(_toc) || _toc >= 0x40000000 || (_toc >= start && _toc < end))
{
sec_end.set(0);
break;
}
if (addr % 4 || addr < start || addr >= end || addr == _toc)
{
sec_end.set(0);
break;
}
}
if (sec_end) ppu_log.notice("Reading OPD section at 0x%x...", sec.addr);
// Mine
for (vm::cptr<u32> ptr = vm::cast(sec.addr); ptr < sec_end; ptr += 2)
{
// Special case: see "Probe"
if (!ptr[0]) ptr += 4;
// Add function and TOC
const u32 addr = ptr[0];
const u32 toc = ptr[1];
ppu_log.trace("OPD: [0x%x] 0x%x (TOC=0x%x)", ptr, addr, toc);
TOCs.emplace(toc);
auto& func = add_func(addr, addr_heap.count(ptr.addr()) ? toc : 0, 0);
func.attr += ppu_attr::known_addr;
known_functions.emplace(addr);
}
}
// Register TOC from entry point
if (entry && !lib_toc)
{
lib_toc = vm::read32(entry) ? vm::read32(entry + 4) : vm::read32(entry + 20);
}
// Secondary attempt
if (TOCs.empty() && lib_toc)
{
add_toc(lib_toc);
}
// Clean TOCs
for (auto&& pair : fmap)
{
if (pair.second.toc == umax)
{
pair.second.toc = 0;
}
}
// Find .eh_frame section
for (const auto& sec : secs)
{
vm::cptr<void> sec_end = vm::cast(sec.addr + sec.size);
// Probe
for (vm::cptr<u32> ptr = vm::cast(sec.addr); ptr < sec_end;)
{
if (!ptr.aligned() || ptr.addr() < sec.addr || ptr >= sec_end)
{
sec_end.set(0);
break;
}
const u32 size = ptr[0] + 4;
if (size == 4 && ptr + 1 == sec_end)
{
// Null terminator
break;
}
if (size % 4 || size < 0x10 || ptr + size / 4 > sec_end)
{
sec_end.set(0);
break;
}
if (ptr[1])
{
const u32 cie_off = ptr.addr() - ptr[1] + 4;
if (cie_off % 4 || cie_off < sec.addr || cie_off >= sec_end.addr())
{
sec_end.set(0);
break;
}
}
ptr = vm::cast(ptr.addr() + size);
}
if (sec_end && sec.size > 4) ppu_log.notice("Reading .eh_frame section at 0x%x...", sec.addr);
// Mine
for (vm::cptr<u32> ptr = vm::cast(sec.addr); ptr < sec_end; ptr = vm::cast(ptr.addr() + ptr[0] + 4))
{
if (ptr[0] == 0u)
{
// Null terminator
break;
}
if (ptr[1] == 0u)
{
// CIE
ppu_log.trace(".eh_frame: [0x%x] CIE 0x%x", ptr, ptr[0]);
}
else
{
// Get associated CIE (currently unused)
const vm::cptr<u32> cie = vm::cast(ptr.addr() - ptr[1] + 4);
u32 addr = 0;
u32 size = 0;
// TODO: 64 bit or 32 bit values (approximation)
if (ptr[2] == 0u && ptr[3] == 0u)
{
size = ptr[5];
}
else if ((ptr[2] + 1 == 0u || ptr[2] == 0u) && ptr[4] == 0u && ptr[5])
{
addr = ptr[3];
size = ptr[5];
}
else if (ptr[2] + 1 && ptr[3])
{
addr = ptr[2];
size = ptr[3];
}
else
{
ppu_log.error(".eh_frame: [0x%x] 0x%x, 0x%x, 0x%x, 0x%x, 0x%x", ptr, ptr[0], ptr[1], ptr[2], ptr[3], ptr[4]);
continue;
}
// TODO: absolute/relative offset (approximation)
if (addr > 0xc0000000)
{
addr += ptr.addr() + 8;
}
ppu_log.trace(".eh_frame: [0x%x] FDE 0x%x (cie=*0x%x, addr=0x%x, size=0x%x)", ptr, ptr[0], cie, addr, size);
// TODO: invalid offsets, zero offsets (removed functions?)
if (addr % 4 || size % 4 || size > (end - start) || addr < start || addr + size > end)
{
if (addr) ppu_log.error(".eh_frame: Invalid function 0x%x", addr);
continue;
}
//auto& func = add_func(addr, 0, 0);
//func.attr += ppu_attr::known_addr;
//func.attr += ppu_attr::known_size;
//func.size = size;
//known_functions.emplace(func);
}
}
}
// Main loop (func_queue may grow)
for (std::size_t i = 0; i < func_queue.size(); i++)
{
ppu_function& func = func_queue[i];
// Fixup TOCs
if (func.toc && func.toc != umax)
{
for (u32 addr : func.callers)
{
ppu_function& caller = fmap[addr];
if (!caller.toc)
{
add_func(addr, func.toc - caller.trampoline, 0);
}
}
for (u32 addr : func.calls)
{
ppu_function& callee = fmap[addr];
if (!callee.toc)
{
add_func(addr, func.toc + func.trampoline, 0);
}
}
}
if (func.blocks.empty())
{
// Special function analysis
const vm::cptr<u32> ptr = vm::cast(func.addr);
const vm::cptr<void> fend = vm::cast(end);
using namespace ppu_instructions;
if (ptr + 1 <= fend && (ptr[0] & 0xfc000001) == B({}, {}))
{
// Simple trampoline
const u32 target = (ptr[0] & 0x2 ? 0 : ptr.addr()) + ppu_opcode_t{ptr[0]}.bt24;
if (target == func.addr)
{
// Special case
func.size = 0x4;
func.blocks.emplace(func.addr, func.size);
func.attr += ppu_attr::no_return;
continue;
}
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 = 0x4;
func.blocks.emplace(func.addr, func.size);
func.attr += new_func.attr & ppu_attr::no_return;
func.calls.emplace(target);
func.trampoline = 0;
continue;
}
}
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 trampoline
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.calls.emplace(target);
func.trampoline = 0;
continue;
}
}
if (ptr + 0x7 <= fend &&
ptr[0] == STD(r2, r1, 0x28) &&
(ptr[1] & 0xffff0000) == ADDIS(r12, r2, {}) &&
(ptr[2] & 0xffff0000) == LWZ(r11, r12, {}) &&
(ptr[3] & 0xffff0000) == ADDIS(r2, r2, {}) &&
(ptr[4] & 0xffff0000) == ADDI(r2, r2, {}) &&
ptr[5] == MTCTR(r11) &&
ptr[6] == BCTR())
{
func.toc = -1;
func.size = 0x1C;
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 + 7;
while (p2 + 0x7 <= fend &&
p2[0] == STD(r2, r1, 0x28) &&
(p2[1] & 0xffff0000) == ADDIS(r12, r2, {}) &&
(p2[2] & 0xffff0000) == LWZ(r11, r12, {}) &&
(p2[3] & 0xffff0000) == ADDIS(r2, r2, {}) &&
(p2[4] & 0xffff0000) == ADDI(r2, r2, {}) &&
p2[5] == MTCTR(r11) &&
p2[6] == BCTR())
{
auto& next = add_func(p2.addr(), -1, func.addr);
next.size = 0x1C;
next.blocks.emplace(next.addr, next.size);
next.attr += ppu_attr::known_addr;
next.attr += ppu_attr::known_size;
p2 += 7;
}
continue;
}
if (ptr + 0x7 <= fend &&
ptr[0] == STD(r2, r1, 0x28) &&
(ptr[1] & 0xffff0000) == ADDIS(r2, r2, {}) &&
(ptr[2] & 0xffff0000) == ADDI(r2, r2, {}) &&
(ptr[3] & 0xffff0000) == LIS(r11, {}) &&
(ptr[4] & 0xffff0000) == ADDI(r11, r11, {}) &&
ptr[5] == MTCTR(r11) &&
ptr[6] == BCTR())
{
// Trampoline with TOC
const u32 target = (ptr[3] << 16) + s16(ptr[4]);
const u32 toc_add = (ptr[1] << 16) + s16(ptr[2]);
if (target >= start && target < end)
{
auto& new_func = add_func(target, 0, func.addr);
if (func.toc && func.toc != umax && new_func.toc == 0)
{
const u32 toc = func.toc + toc_add;
add_toc(toc);
add_func(new_func.addr, toc, 0);
}
else if (new_func.toc && new_func.toc != umax && func.toc == 0)
{
const u32 toc = new_func.toc - toc_add;
add_toc(toc);
add_func(func.addr, toc, 0);
}
else if (new_func.toc - func.toc != toc_add)
{
//func.toc = -1;
//new_func.toc = -1;