[PATCH] backends,bpf: add proper relocation support

Due to libdw does not have proper BPF relocation support, the pahole cannot display filenames correctly for objects with default llvm options. So we have to invent a special option "llc -march=bpf -mattr=dwarfris" to prevent llvm from generating cross-section dwarf relocation records (https://revie

Re: [PATCH] readelf: While printing .debug_loc make sure that next_off doesn't overflow.

On Wed, Jun 13, 2018 at 03:24:45PM +0200, Mark Wielaard wrote: > Found by the afl fuzzer. The next offset (after a locview) comes from a > DIE loclist attribute. This could be a bogus value so large it overflows > the buffer and makes us print past the end of buffer. Pushed to master.

Re: [PATCH] readelf: Handle signedness of DW_FORM_implicit_const and DW_AT_const_value.

On Wed, Jun 13, 2018 at 02:51:43PM +0200, Mark Wielaard wrote: > We only handles DW_FORM_sdata as a signed form, but DW_FORM_implicit_const > is also signed by default. For DW_AT_const_value we can do a little better. > GCC encodes some const_values with signed forms, even though the type > is unsi

[PATCH] libdw, readelf: Don't handle DW_FORM_data16 as expression block/location.

Also found by afl-fuzz on the varlocs testcase. DW_FORM_data16 is constant from according to the DWARF5 spec. But since it is 128bits it isn't really representable as Dwarf_Word. So we treat it as block form. But we cannot treat it as an expression block. Make sure readelf prints it as a regular bl