1 #pragma GCC system_header 2 #define NULL (void *) 0 3 #define ONEP (void *) 1 4 #define RETURN return NULL 5 6 extern void sysbar (unsigned char *); 7 8 unsigned char * sysfn1(void * p)9sysfn1 (void *p) 10 { 11 unsigned char *uc = ONEP; 12 uc = ONEP; 13 sysbar (ONEP); 14 return ONEP; 15 } 16 17 extern void sysbar2 (int); 18 19 int sysfn2(void)20sysfn2 (void) 21 { 22 int a = NULL; 23 a = NULL; 24 sysbar2 (NULL); 25 return NULL; 26 } 27 28 int sysfn3(void)29sysfn3 (void) 30 { 31 RETURN; 32 } 33