Appending to BFD

[Paulo J. Matos]

Is this even possible?

On 14/11/11 11:42, Paulo J. Matos wrote:
> Hello,
>
> I am trying to open an elf file and appending a string to the
> .debug_comment section. I am doing:
>
> void record_version_in_section(bfd *abfd, asection *sec, void *data)
> {
>
> if(strcmp(sec->name, ".debug_comment"))
> return;
>
> // Get version into a buffer
>
>
> char buf[128];
> const char *argv0 = strrchr(program_name, '/');
> if(!argv0)
> argv0 = strrchr(program_name, '\\');
> if(!argv0)
> argv0 = program_name;
> else
> argv0++;
> snprintf(buf, 128, "%s %s\n", argv0, BFD_VERSION_STRING);
>
> unsigned int size = bfd_get_section_size(sec);
> bfd_boolean size_ok = bfd_set_section_size(abfd, sec, size + strlen(buf)
> + 1);
> if(!size_ok)
> return;
>
> bfd_boolean contents_ok = bfd_set_section_contents(abfd, sec, buf, size,
> strlen(buf) + 1);
> if(!contents_ok)
> {
> // OOPS failed to set contents
>
>
> }
>
> }
>
> void record_version(const std::string &file)
> {
> // Open BFD and get section size
>
> bfd *abfd = bfd_fopen(file.c_str(), NULL, "a+", -1);
> if(abfd == NULL)
> {
> std::cerr << "warning: can't open elf `" << file<< "' to write klink
> information\n";
> return;
> }
>
> char **matching;
> bfd_check_format_matches(abfd, bfd_object, &matching);
> bfd_map_over_sections(abfd, record_version_in_section, NULL);
> bfd_close(abfd);
> }
>
>
> This however fails when trying to set the new section size.
>
> Any suggestions on how to do this?
>
> Cheers,
>


-- 
PMatos