Follow-up Comment #1, bug #38800 (project grub):
Some other random things discovered by the way:
0. grub-core/gdb_grub needs a correction for 64-bit pointers and data
structures change:
--- grub-core/gdb_grub.in
+++ grub-core/gdb_grub.in
@@ -22,7 +22,7 @@
printf "%s", $mod->name
set $segment = $mod->segment
while ($segment)
- printf " %i 0x%x", $segment->section, $segment->addr
+ printf " %i 0x%lx", $segment->section, $segment->addr
set $segment = $segment->next
end
printf "n"
@@ -61,7 +61,7 @@
define load_all_modules
set $this = grub_dl_head
while ($this != 0)
- dump_module_sections $this->mod
+ dump_module_sections $this
set $this = $this->next
end
match_and_load_symbols
1. FOR_LIST_ELEMENTS_SAFE is not as safe as it says: it will dereference the
final NULL pointer after assigning it to var. Which is mostly harmless without
memory protection, but crashes grub-emu running the help command.
2. Speaking of which, running "help help" crashes because the help command was
registered with a 0 pointer for the parser argument. The NULL check in
grub_arg_show_help() happens too late. This does not seem to do much on real
hardware, though it may access some bogus data.
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