Hello Masahisa, Ilias, Ruchika,
please, have a look at the cppcheck results for efi_tcg2.c.
[unusedFunction] may be due to checking a single file.
[arithOperationsOnVoidPointer] you might ignore. But the rest should be addressed.
Best regards
Heinrich
$ cppcheck lib/efi_loader/efi_tcg2.c --enable=all --std=c11 Checking lib/efi_loader/efi_tcg2.c ...
Checking lib/efi_loader/efi_tcg2.c: __ASSEMBLY__... lib/efi_loader/efi_tcg2.c:1537:6: style: Local variable 'buffer' shadows outer variable [shadowVariable] u8 buffer[TPM2_SHA512_DIGEST_SIZE] = { 0 }; ^ lib/efi_loader/efi_tcg2.c:1497:8: note: Shadowed declaration void *buffer; ^ lib/efi_loader/efi_tcg2.c:1537:6: note: Shadow variable u8 buffer[TPM2_SHA512_DIGEST_SIZE] = { 0 }; ^ include/efi_api.h:991:23: portability: '(void*)blk' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] return ((void *)blk) + sizeof(*blk) + ^ include/efi_api.h:991:38: portability: '((void*)blk)+sizeof(*blk)' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] return ((void *)blk) + sizeof(*blk) + ^ lib/efi_loader/efi_tcg2.c:858:55: portability: 'event_log.buffer' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] *event_log_last_entry = (uintptr_t)(event_log.buffer + event_log.pos - ^ lib/efi_loader/efi_tcg2.c:858:71: portability: 'event_log.buffer+event_log.pos' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] *event_log_last_entry = (uintptr_t)(event_log.buffer + event_log.pos - ^ lib/efi_loader/efi_tcg2.c:1016:34: portability: 'efi' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] nt = (IMAGE_NT_HEADERS32 *)(efi + dos->e_lfanew); ^ lib/efi_loader/efi_tcg2.c:1644:16: portability: 'buffer' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined. [arithOperationsOnVoidPointer] memset(buffer + spec_event_size, 0, 1); ^ Heinrich: For writing a single byte you should use an assignment after converting to u8* instead of calling a library function.
lib/efi_loader/efi_tcg2.c:1359:11: style: Variable 'hash_sz' is assigned a value that is never used. [unreadVariable] hash_sz = ^ lib/efi_loader/efi_tcg2.c:1439:13: style: Variable 'event_type' is assigned a value that is never used. [unreadVariable] event_type = get_unaligned_le32(&event->event_type); ^ lib/efi_loader/efi_tcg2.c:2223:0: style: The function 'efi_tcg2_measure_efi_app_exit' is never used. [unusedFunction]
^ lib/efi_loader/efi_tcg2.c:2170:0: style: The function 'efi_tcg2_measure_efi_app_invocation' is never used. [unusedFunction]
^ lib/efi_loader/efi_tcg2.c:2277:0: style: The function 'efi_tcg2_notify_exit_boot_services_failed' is never used. [unusedFunction]
^ lib/efi_loader/efi_tcg2.c:2358:0: style: The function 'efi_tcg2_register' is never used. [unusedFunction]
^ lib/efi_loader/efi_tcg2.c:951:0: style: The function 'tcg2_measure_pe_image' is never used. [unusedFunction]