On Thu, 2018-03-01 at 14:55 +0100, Mark Wielaard wrote: > This adds minimal support for locviews as output by GCC8. > It changes readelf to keep track of loclistptrs from DW_AT_GNU_locviews > and prints the locview pairs for those. Since there is no terminator > we have to keep track of where the next loclist entry starts. > The --debug-dump=loc output looks as follows: > > CU [ 714] base: +0x0000000000003020 <elf_hash> > [ b4] view pair 1, 2 > [ b6] range 4, 7f > +0x0000000000003024 <elf_hash+0x4>.. > +0x000000000000309e <elf_hash+0x7e> > [ 0] reg5 > [ d9] view pair 3, 1 > view pair 1, 2 > [ dd] range 4, 4c > +0x0000000000003024 <elf_hash+0x4>.. > +0x000000000000306b <elf_hash+0x4b> > [ 0] reg5 > range 4c, 7f > +0x000000000000306c <elf_hash+0x4c>.. > +0x000000000000309e <elf_hash+0x7e> > [ 0] reg2 > > Note that in the above output the view pairs correspond to the ranges > immediately following in the loc list. This is how GCC8 currently > outputs the locview pairs and ranges, but this is not guaranteed and > you'll need to look at the location and GNU_locviews attributes of the > DIE to know which really match up together. We might want to adjust the > output to make this more clear. > > This does not yet add an locview accessor to libdw. It just recognizes > the DW_AT_GNU_locviews attribute as a loclistptr when encoded as a > sec_offset form.
Pushed to master.
