NAME
warning::symbols - systemtap missing-symbols warnings DESCRIPTION For some probing operations, where DWARF debugging data is not avail‐ able, systemtap needs ELF symbols for the relevant binaries. This allows at least probe addresses to be calculated, some variables resolved, and with @cast() and headers, maybe even some types. kernel symbol table
Systemtap may need a linux-build style System.map file to find addresses of kernel functions/data. It may be possible to cre‐ ate it by hand:
% su
# cp /proc/kallsyms /boot/System.map-`uname -r` or
# nm /lib/modules/`uname -r`/build/vmlinux > /boot/System.map-`uname -r` minisymbols On some systems, binaries may be compiled with a subset of sym‐ bols useful for function tracing and backtraces. This 'Minisym‐ bols' is a xz compressed section labeled .gnudebugdata. Sup‐ port for minisymbols relies on elfutils version 0.156 or later. compressed symbols On some systems, symbols may be available, but compressed into .zdebug* sections. Support for compressed symbols relies on elfutils version 0.153 or later. SEE ALSO stap(1), stappaths(7), strip(1), warning::debuginfo(7stap), error::dwarf(7stap), error::reporting(7stap), http://fedoraproject.org/wiki/Features/MiniDebugInfo WARNING::SYMBOLS(7stap)