source: mainline/boot/grub.efi/x86_64-efi/gdb_grub@ 66262a1b

###
### Load debuging information about GNU GRUB 2 modules into GDB
### automatically. Needs readelf, Perl and gmodule.pl script
###
### Has to be launched from the writable and trusted
### directory containing *.image and *.module
###
### $Id: .gdbinit,v 1.1 2006/05/14 11:38:08 lkundrak Exp $
### Lubomir Kundrak <lkudrak@skosi.org>
###

# Add section numbers and addresses to .segments.tmp
define dump_module_sections
        set $mod = $arg0

        # FIXME: save logging status
        set logging file .segments.tmp
        set logging redirect on
        set logging overwrite off
        set logging on

        printf "%s", $mod->name
        set $segment = $mod->segment
        while ($segment)
                printf " %i 0x%lx", $segment->section, $segment->addr
                set $segment = $segment->next
        end
        printf "\n"

        set logging off
        # FIXME: restore logging status
end
document dump_module_sections
        Gather information about module whose mod structure was
        given for use with match_and_load_symbols
end

# Generate and execute GDB commands and delete temporary files
# afterwards
define match_and_load_symbols
        shell perl gmodule.pl <.segments.tmp >.loadsym.gdb
        source .loadsym.gdb
        shell rm -f .segments.tmp .loadsym.gdb
end
document match_and_load_symbols
        Launch script, that matches section names with information
        generated by dump_module_sections and load debugging info
        apropriately
end

###

define load_module
        dump_module_sections $arg0
        match_and_load_symbols
end
document load_module
        Load debugging information for module given as argument.
end

define load_all_modules
        set $this = grub_dl_head
        while ($this != 0)
                dump_module_sections $this
                set $this = $this->next
        end
        match_and_load_symbols
end
document load_all_modules
        Load debugging information for all loaded modules.
end

###

set confirm off
file kernel.exec
target remote :1234

# inform when module is loaded
break grub_dl_add
commands
        silent
        load_module mod
        cont
end