Header             21 umalloc.c      static Header base;
Header             22 umalloc.c      static Header *freep;
Header             27 umalloc.c        Header *bp, *p;
Header             29 umalloc.c        bp = (Header*)ap - 1;
Header             46 umalloc.c      static Header*
Header             50 umalloc.c        Header *hp;
Header             54 umalloc.c        p = sbrk(nu * sizeof(Header));
Header             57 umalloc.c        hp = (Header*)p;
Header             66 umalloc.c        Header *p, *prevp;
Header             69 umalloc.c        nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;