Rossym.gdb
rossym.gdb
define log_to_file
set logging file $arg0
set logging redirect on
set logging overwrite on
set logging on
end
define end_log
set logging off
end
define load-module-nostrip
set $modname = $arg0
set $modaddr = $arg1
printf "Loading module symbols at 0x%x\n", $modaddr
log_to_file sym.tmp
printf "%s\n0x%x", ((char *)$name), $modaddr
end_log
shell sed -e 's/\..*$//g' < sym.tmp > modname_stripped.txt
shell find output-i386 -name `head -n 1 modname_stripped.txt`.nostrip.\* > found_mod.txt
log_to_file loadsym.sh
printf "echo add-symbol-file `cat found_mod.txt` `tail -n 1 sym.tmp`"
end_log
shell sh loadsym.sh > load_module.gdb
source load_module.gdb
end
define copy-module-name
set $ndx = 0
while (((KDB_MODULE_INFO*)$modinf)->Name[$ndx])
set ((char *)$name)[$ndx] = ((KDB_MODULE_INFO*)$modinf)->Name[$ndx]
set $ndx = $ndx + 1
end
set ((char *)$name)[$ndx] = 0
end
define load-all-modules
set $stack_space = $esp - 1024
set $modinf = $stack_space
set $name = $stack_space + sizeof(KDB_MODULE_INFO)
set $index = 1
set $result = KdbpSymFindModuleByIndex($index,$modinf)
while ($result != 0)
copy-module-name
printf "Loading symbols for %s\n", ((char *)$name)
load-module-nostrip $name (((PKDB_MODULE_INFO)$modinf)->Base+0x1000)
set $index = $index + 1
set $result = KdbpSymFindModuleByIndex($index,$modinf)
end
end
.gdbinit
add-symbol-file output-i386/ntoskrnl/ntoskrnl.nostrip.exe
source lib/rossym/rossym.gdb
target remote :1234
break RosSymInit
c
fin
fin
fin
Run qemu like 'qemu -hda reactos.img -S -s'
So then you can break at some point later, and when you want to load kernel symbols, do 'load-all-modules'