1*ec5783cbSrsc 2*ec5783cbSrsc 3*ec5783cbSrsc 4*ec5783cbSrscThe source listing is preceded by a cross-reference listing every defined 5*ec5783cbSrscconstant, struct, global variable, and function in xv6. Each entry gives, 6*ec5783cbSrscon the same line as the name, the line number (or, in a few cases, numbers) 7*ec5783cbSrscwhere the name is defined. Successive lines in an entry list the line 8*ec5783cbSrscnumbers where the name is used. For example, this entry: 9*ec5783cbSrsc 10*ec5783cbSrsc namei 4760 11*ec5783cbSrsc 0333 4760 4859 4908 12*ec5783cbSrsc 4958 5007 5016 5414 13*ec5783cbSrsc 5427 5512 5560 5640 14*ec5783cbSrsc 15*ec5783cbSrscindicates that namei is defined on line 4760 and is mentioned on twelve lines 16*ec5783cbSrscon sheets 03, 47, 48, 49, 50, 54, 55, and 56. 17