On Tue, 2018-05-08 at 00:06 +0200, Mark Wielaard wrote: > In DWARF5 the actual line number table format doesn't change, except for > not allowing DW_LNE_define_file (but we still just accept it). The > changes are the header having new fields for address and segment > selector sizes, and new formats for the directory and file names tables. > > The directory and file name tables are much more flexible in DWARF5, but > we only interpret the actual names and file/dir index relationships, > skipping/ignoring any other information. There also is no new interface > yet to get at the new directory and file properties. > > There is some small confusion about the file name table indexing. Older > DWARF versions explicitly called the first file name table 1. DWARF5 > implies the first index is 0 (but for file attributes, zero means not > associated with a file). We get away with that by having an actual zero > index for older DWARF versions (the null_fill). It looks like gcc gets > around it by explicitly duplicating the first (0) and second (1) file > name entry in the table. This can also be seen in the new testcase. > > The patch looks big because of moving a few initializations around > and because the code that is different for older/newer DWARF got moved > under if statements. But the original old DWARF code path didn't really > change.
Pushed to master.
