sys_sbrk           94 kernel/syscall.c extern uint64 sys_sbrk(void);
sys_sbrk          119 kernel/syscall.c [SYS_sbrk]    sys_sbrk,
sys_sbrk          153 user/ulib.c      return sys_sbrk(n, SBRK_EAGER);
sys_sbrk          158 user/ulib.c      return sys_sbrk(n, SBRK_LAZY);
sys_sbrk           24 user/user.h    char* sys_sbrk(int,int);