Appending to BFD

["Paulo J. Matos" <paulo at matos-sorge dot com>]

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