refactor: Soundbank runtime hooking improvement

> change default behaviour to pattern based patch for hooks::soundbank, see #13 > fix broken check for hooks::soundbank unsupported game version
2026-02-17 19:30:01 +09:00
parent 97cca85bc8
commit 82439962d6
3 changed files with 108 additions and 35 deletions
@@ -249,3 +249,52 @@ bool get_pe_identifier(const std::filesystem::path& dll_path, uint32_t* time_dat

    return true;
 }
+
+intptr_t find_asm_leacstr_from(HMODULE module, reg_t reg, const char *cstr)
+{
+    // get module information
+    MODULEINFO module_info{};
+    if (!GetModuleInformation(GetCurrentProcess(), module, &module_info, sizeof(module_info)))
+    {
+        return 0;
+    }
+    const unsigned char *modbegp = reinterpret_cast<unsigned char *>(module);
+    const unsigned char *modendp = reinterpret_cast<unsigned char *>(module) + static_cast<size_t>(module_info.SizeOfImage);
+
+    // search cstr
+    const unsigned char *cstr_addr = std::search(
+            modbegp,
+            modendp,
+            reinterpret_cast<const unsigned char *>(cstr),
+            reinterpret_cast<const unsigned char *>(cstr) + strlen(cstr)
+    );
+    if (cstr_addr == modendp)
+    {
+        return 0;
+    }
+
+#if defined(__i386__)
+    // find LEA REG, [abs32]
+    unsigned char asmop[6] = { 0x8D, reg.v, 0x00, 0x00, 0x00, 0x00};
+    int32_t dist32 = reinterpret_cast<int32_t>(cstr_addr);
+    memcpy(asmop + (sizeof(asmop) - 4), &dist32, 4);
+    return reinterpret_cast<intptr_t>(std::search(
+            modbegp,
+            modendp,
+            asmop,
+            asmop + sizeof(asmop)
+    ));
+#elif defined(__x86_64__)
+    // find LEA REG, [RIP + rel32]
+    unsigned char rex = reg.t == GPR_EXT ? 0x4C : 0x48;
+    unsigned char asmop[7] = {rex, 0x8D, reg.v, 0x00, 0x00, 0x00, 0x00};
+    for (const unsigned char *addr = modbegp; addr < modendp - sizeof(asmop); addr++)
+    {
+        auto dist32 = static_cast<int32_t>(reinterpret_cast<intptr_t>(cstr_addr) - reinterpret_cast<intptr_t>(addr + sizeof(asmop)));
+        memcpy(asmop + (sizeof(asmop) - 4), &dist32, 4);
+        if (memcmp(addr, asmop, sizeof(asmop)) == 0) return reinterpret_cast<intptr_t>(addr);
+    }
+#endif
+
+    return 0;
+}
@@ -89,4 +89,54 @@ intptr_t replace_pattern_from(
        intptr_t usage,
        intptr_t start_from);

-bool get_pe_identifier(const std::filesystem::path& dll_path, uint32_t* time_date_stamp, uint32_t* address_of_entry_point);
+bool get_pe_identifier(const std::filesystem::path& dll_path, uint32_t* time_date_stamp, uint32_t* address_of_entry_point);
+
+union reg_t{
+    struct{
+        unsigned char t;
+        unsigned char v;
+    };
+    unsigned short s;
+    constexpr reg_t(unsigned char t, unsigned char v) : s(v << 8 | t) {}
+    constexpr reg_t(unsigned short s) : s(s) {}
+};
+
+enum REGTYPE : unsigned char
+{
+    GPR_32,
+    GPR_64,
+    GPR_EXT
+};
+
+enum REG : unsigned short
+{
+    EAX = reg_t(GPR_32, 0x05).s,
+    ECX = reg_t(GPR_32, 0x0D).s,
+    EDX = reg_t(GPR_32, 0x15).s,
+    EBX = reg_t(GPR_32, 0x1D).s,
+    ESP = reg_t(GPR_32, 0x25).s,
+    EBP = reg_t(GPR_32, 0x2D).s,
+    ESI = reg_t(GPR_32, 0x35).s,
+    EDI = reg_t(GPR_32, 0x3D).s,
+    RAX = reg_t(GPR_64, 0x05).s,
+    RCX = reg_t(GPR_64, 0x0D).s,
+    RDX = reg_t(GPR_64, 0x15).s,
+    RBX = reg_t(GPR_64, 0x1D).s,
+    RSP = reg_t(GPR_64, 0x25).s,
+    RBP = reg_t(GPR_64, 0x2D).s,
+    RSI = reg_t(GPR_64, 0x35).s,
+    RDI = reg_t(GPR_64, 0x3D).s,
+    R8  = reg_t(GPR_EXT, 0x05).s,
+    R9  = reg_t(GPR_EXT, 0x0D).s,
+    R10 = reg_t(GPR_EXT, 0x15).s,
+    R11 = reg_t(GPR_EXT, 0x1D).s,
+    R12 = reg_t(GPR_EXT, 0x25).s,
+    R13 = reg_t(GPR_EXT, 0x2D).s,
+    R14 = reg_t(GPR_EXT, 0x35).s,
+    R15 = reg_t(GPR_EXT, 0x3D).s
+};
+
+intptr_t find_asm_leacstr_from(
+        HMODULE module,
+        reg_t reg,
+        const char *cstr);