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There are broadly two classes of targets to consider when loading symbols for GRUB, targets that determine where to load GRUB at runtime (dynamically positioned) and those that do not (statically positioned). For statically positioned targets, symbol loading is determined at link time, so nothing more needs to be known to load the symbols. For dynamically positioned targets, such as EFI targets, at runtime symbols should be offset by an amount that depends on where the runtime chose to load GRUB. It is important to not load symbols statically for dynamic targets because then when subsequently loading the symbols correctly one must take care to remove the existing static symbols, otherwise there will be two sets of symbols and GDB seems to prefer the ones loaded first (i.e. the static ones). Use autoconf variables to generate a gdb_grub for a particular target, which conditionally run startup code depending on if the target uses static or dynamic loading. Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'