1ec5783cbSrsc 2ec5783cbSrsc 3ec5783cbSrsc 4*8be7e703SrscThe source listing is preceded by a cross-reference that lists every defined 5ec5783cbSrscconstant, struct, global variable, and function in xv6. Each entry gives, 6ec5783cbSrscon the same line as the name, the line number (or, in a few cases, numbers) 7ec5783cbSrscwhere the name is defined. Successive lines in an entry list the line 8ec5783cbSrscnumbers where the name is used. For example, this entry: 9ec5783cbSrsc 10ec5783cbSrsc namei 4760 11ec5783cbSrsc 0333 4760 4859 4908 12ec5783cbSrsc 4958 5007 5016 5414 13ec5783cbSrsc 5427 5512 5560 5640 14ec5783cbSrsc 15ec5783cbSrscindicates that namei is defined on line 4760 and is mentioned on twelve lines 16ec5783cbSrscon sheets 03, 47, 48, 49, 50, 54, 55, and 56. 17