The 64-bit gdb on Solaris can't parse 32-bit core dump file

[Nan Xiao]

Hi, all:

I have reported a issue about gdb: https://sourceware.org/bugzilla/show_bug.cgi?id=17045. To be simple, it is the 64-bit gdb on Solaris can't parse 32-bit core dump file. I also find this issue has been reported in 2012:https://sourceware.org/bugzilla/show_bug.cgi?id=14944.

    I have tried to analyse the issue, and find the cause:

asection *

bfd_get_section_by_name (bfd *abfd, const char *name)

{

 struct section_hash_entry *sh;

 sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);

 if (sh != NULL)

return &sh->section;

 return NULL;

}

static void

core_open (char *filename, int from_tty)

{

......

bfd_map_over_sections (core_bfd, add_to_thread_list,

bfd_get_section_by_name (core_bfd, ".reg"));

......

}

The core_open try to get ".reg" section, and the ".reg" section doesn't exist, but section_hash_lookup doesn't create it.

Then when execute get_core_register_section (core_open->post_create_inferior->.....->get_core_register_section) function:

static void

get_core_register_section (struct regcache *regcache,

  const char *name,

  int which,

  const char *human_name,

  int required)

{

......

section = bfd_get_section_by_name (core_bfd, section_name);

 if (! section)

{

 if (required)

warning (_("Couldn't find %s registers in core file."),

human_name);

 return;

}

......

}

Because the ".reg" section doesn't exist, so the warning will report.

Could anyone help or comment on this issue? Thanks very much!

Best Regards

Nan Xiao