etext              16 kernel/vm.c    extern char etext[];  // kernel.ld sets this to end of kernel code.
etext              39 kernel/vm.c      kvmmap(kpgtbl, KERNBASE, KERNBASE, (uint64)etext-KERNBASE, PTE_R | PTE_X);
etext              42 kernel/vm.c      kvmmap(kpgtbl, (uint64)etext, (uint64)etext, PHYSTOP-(uint64)etext, PTE_R | PTE_W);