diff options
Diffstat (limited to 'src/events.c')
| -rw-r--r-- | src/events.c | 112 |
1 files changed, 94 insertions, 18 deletions
diff --git a/src/events.c b/src/events.c index 7438309..4f2115a 100644 --- a/src/events.c +++ b/src/events.c @@ -51,14 +51,42 @@ void load_symbols(const void* base_addr, struct module* module) { print("Module Base Address %xu\n", base_addr); print("Module Size %xu\n", module->nt_header.OptionalHeader.SizeOfImage); +#ifndef HASHMAP + // Exception directory + IMAGE_DATA_DIRECTORY exception_entry = module->nt_header.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION]; + + if (exception_entry.Size == 0U) { + print("Exception directory is empty in module %s\n", module->name); + } + + RUNTIME_FUNCTION* exception_table = VirtualAlloc(NULL, exception_entry.Size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); + if (!read_memory((const void*)((u64)base_addr + (u64)exception_entry.VirtualAddress), (void*)exception_table, exception_entry.Size)) { + print("Cannot read exception table for module %s at address %x\n", (char*)module->name, base_addr); + return; + } + + u32 pdata_entries = exception_entry.Size / sizeof(exception_table[0U]); + module->functions_name = VirtualAlloc(NULL, pdata_entries * sizeof(module->functions_name[0U]), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + module->functions_start = VirtualAlloc(NULL, pdata_entries * sizeof(module->functions_start[0U]), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + module->functions_end = VirtualAlloc(NULL, pdata_entries * sizeof(module->functions_end[0U]), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + module->functions_unwind = VirtualAlloc(NULL, pdata_entries * sizeof(module->functions_unwind[0U]), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + module->functions_count = pdata_entries; + for (u32 index = 0U; index < pdata_entries; index++) { + RUNTIME_FUNCTION cur_entry = exception_table[index]; + module->functions_start[index] = cur_entry.BeginAddress; + module->functions_end[index] = cur_entry.EndAddress; + module->functions_unwind[index] = cur_entry.UnwindData; + module->functions_name[index] = (u8*)dummy_name; + } +#endif + // Export table IMAGE_DATA_DIRECTORY export_table = module->nt_header.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT]; IMAGE_EXPORT_DIRECTORY export_dir = { 0U }; const void* export_dir_start = (const void*)((u64)base_addr + (u64)export_table.VirtualAddress); const void* export_dir_end = (const void*)((u64)export_dir_start + export_table.Size); - if (export_table.Size != 0U) { - if (!read_memory((const void*)((u64)base_addr + (u64)export_table.VirtualAddress), (void*)&export_dir, sizeof(export_dir))) { + if (!read_memory(export_dir_start, (void*)&export_dir, sizeof(export_dir))) { print("Cannot read export dir for module %s at address %x\n", (char*)module->name, base_addr); return; } @@ -71,8 +99,8 @@ void load_symbols(const void* base_addr, struct module* module) { } size_t names_size = export_dir.NumberOfNames * sizeof(u32); - u32* names = VirtualAlloc(NULL, names_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); - if (!read_memory((const void*)((u64)base_addr + (u64)export_dir.AddressOfNames), (void*)names, names_size)) { + u32* names_address = VirtualAlloc(NULL, names_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + if (!read_memory((const void*)((u64)base_addr + (u64)export_dir.AddressOfNames), (void*)names_address, names_size)) { print("Cannot read names from export directory for module %s at address %x\n", (char*)module->name, base_addr); return; } @@ -84,6 +112,52 @@ void load_symbols(const void* base_addr, struct module* module) { return; } +#ifndef HASHMAP + // u32 global_functions_index = 0U; + for (u32 i = 0U; i < export_dir.NumberOfFunctions; i++) { + u64 address = (u64)base_addr + addresses[i]; + u32 name_index = 0U; + u8* name = string_stack_current; + size_t length = 0U; + for (; name_index < export_dir.NumberOfNames; name_index++) { + if (ordinals[name_index] == i) { + // TODO: Add string management code + assert(string_stack_current - 16U * 4096U < string_stack_base); + void* name_address = (void*)((u64)module->base_addr + names_address[name_index]); + read_memory(name_address, name, 256U); + StringCchLengthA((PCNZCH)name, STRSAFE_MAX_CCH, &length); + break; + } + } + + if (name_index == export_dir.NumberOfNames) { + print("%u : Function has no name, function address %xu\n", i, addresses[i]); + continue; + } + + if (export_dir_start < (void*)address && (void*)address < export_dir_end) { + print("%u : Fowarded function : %s\n", i, name); + continue; + } + + u32 global_functions_index = 0U; + for(; global_functions_index < module->functions_count; global_functions_index++) { + if (module->functions_start[global_functions_index] == addresses[i]) { + string_stack_current[length] = '\0'; + module->functions_name[global_functions_index] = name; + string_stack_current += length + 1U; + print("%u : Function name : %s, function address %xu\n", i, name, addresses[i]); + break; + } + } + + if (global_functions_index == module->functions_count) { + print("Function not found : %s!\n", string_stack_current); + } + } +#endif + +#ifdef HASHMAP print("Found %u functions\n", export_dir.NumberOfFunctions); for (u32 i = 0U; i < export_dir.NumberOfFunctions; i++) { char func_name[256U] = { 0 }; @@ -95,7 +169,7 @@ void load_symbols(const void* base_addr, struct module* module) { } } - u64 name_address = (u64)base_addr + names[name_index]; + u64 name_address = (u64)base_addr + names_address[name_index]; read_memory((void*)name_address, func_name, sizeof(func_name)); if (export_dir_start < (void*)func_address && (void*)func_address < export_dir_end) { @@ -108,10 +182,11 @@ void load_symbols(const void* base_addr, struct module* module) { insert_elem(&module->symbols, addresses[i], 0U, (u64)dummy_name); } } +#endif - VirtualFree(names, names_size, MEM_RELEASE); - VirtualFree(addresses, addresses_size, MEM_RELEASE); + VirtualFree(names_address, names_size, MEM_RELEASE); VirtualFree(ordinals, ordinals_size, MEM_RELEASE); + VirtualFree(addresses, addresses_size, MEM_RELEASE); } // Private symbols @@ -123,20 +198,18 @@ void load_symbols(const void* base_addr, struct module* module) { return; } - struct codeview_header { - u32 signature; - u32 guid[4U]; - u32 age; - char path; - }; - for (u32 i = 0U; i < debug_table.Size / sizeof(debug_entries[0U]); i++) { if (debug_entries[i].Type != IMAGE_DEBUG_TYPE_CODEVIEW) { print("Image debug type different from CodeView\n"); continue; } - struct codeview_header header = { 0U }; + struct codeview_header { + u32 signature; + u32 guid[4U]; + u32 age; + char path; + } header = { 0U }; if (!read_memory((const void*)((u64)base_addr + (u64)debug_entries[i].AddressOfRawData), (void*)&header, debug_entries[i].SizeOfData)) { print("Cannot read code view header for module %s at address %x\n", (char*)module->name, base_addr); } @@ -146,7 +219,8 @@ void load_symbols(const void* base_addr, struct module* module) { } - // Expection directory +#ifdef HASHMAP + // Exception directory IMAGE_DATA_DIRECTORY exception_entry = module->nt_header.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION]; if (exception_entry.Size == 0U) { @@ -159,8 +233,9 @@ void load_symbols(const void* base_addr, struct module* module) { return; } - // struct UNWIND_INFO* u_info = VirtualAlloc(NULL, 4096U, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); - for (u32 index = 0U; index < exception_entry.Size / sizeof(exception_table[0U]); index++) { + // Find unwind info offset + u32 pdata_entries = exception_entry.Size / sizeof(exception_table[0U]); + for (u32 index = 0U; index < pdata_entries; index++) { RUNTIME_FUNCTION cur_entry = exception_table[index]; struct element* elem = find_elem(&module->symbols, cur_entry.BeginAddress); @@ -255,6 +330,7 @@ void load_symbols(const void* base_addr, struct module* module) { // } // } } +#endif // VirtualFree(u_info, 4096U, MEM_RELEASE); VirtualFree(exception_table, exception_entry.Size, MEM_RELEASE); |