Daniel,
This should be fixed in r3164. Could you verify?
DWARF4 line section added a new field in the header and I missed that.
More work will probably be needed later but now the parsing part should be
ok.
/Kai
On Wed, Feb 18, 2015 at 7:31 AM, Daniel Wilkerson <
daniel.wilker...@gmail.com> wrote:
> I tried using elftoolchain to parse the dwarf source line annotation
> output of vanilla gcc 4.9.2 and it works just fine. In contrast, as
> stated below, parsing the output of the riscv-gcc 4.9.2 produces the
> error below: "Line info section too short". Clearly this is a problem
> introduced by the riscv people.
>
> However, objdump parses the dwarf source line output of both compilers
> without complaint. So if I report the bug to the riscv people at
> Berkeley that their compiler produces output that objdump likes but
> that elftoolchain will not parse, they can easily say that this is a
> bug in elftoolchain.
>
> I am basically blocked on this issue, so I am now in bug hell. Any
> assistance would be greatly appreciated. Can elftoolchain be made a
> bit more tolerant? I will also write the riscv people.
>
> On Mon, Feb 16, 2015 at 1:07 PM, Daniel Wilkerson
> <daniel.wilker...@gmail.com> wrote:
> > The RISC-V people at Berkeley have modified gcc 4.9.2 to target the
> > RISC-V ISA. I have been able to use elftoolchain to parse the output
> > of previous versions of gcc which they have hacked, but not this one.
> > When I try to get the dwarf source lines from ELF they produce, as
> > follows:
> >
> > int const dwarf_src_res =
> > dwarf_srclines(root_die, &lines, &num_lines, &dwarf_error);
> > . . .
> > fprintf(stderr, "Dwarf_Source_Lines:"
> > "DW_DLE_NO_ENTRY:%d, DW_DLV_OK:%d, "
> > "dwarf_src_res: %d\n",
> > DW_DLE_NO_ENTRY, DW_DLV_OK, dwarf_src_res);
> > . . .
> > dwarf_errmsg(dwarf_error)
> >
> > I get a dwarf_src_res of 1:
> > Dwarf_Source_Lines:DW_DLE_NO_ENTRY:4, DW_DLV_OK:0, dwarf_src_res: 1
> >
> > And this error message:
> > Line info section too short [_dwarf_lineno_init(335)]
> >
> > However objdump reads and will output the source lines of the same ELF
> file.
> >
> > Is anyone else getting this result parsing the DWARF source lines
> > coming from, say, unmodified gcc 4.9.2 ?
> >
> > Daniel
>
>
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