[U-Boot] li r0,__got2_entries@sectoff@l

hi all: i am a u-boot beginner, i found a line code "li r0,__got2_entries@sectoff@l" in almost all mpc start.s.i have tried to delete sectoff and i got same result of uboot with "li r0,__got2_entries@l". could you tell me what difference between "li r0,__got2_entries@sectoff@l" and "li r0,__got2_entries@l" and why the author use "li r0,__got2_entries@sectoff@l" but not "li r0,__got2_entries@l".thanks very much.