NAME

       warning::symbols - systemtap missing-symbols warnings

DESCRIPTION

       For  some probing operations, where DWARF debugging data is not available, 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 create 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  symbols  useful  for
              function  tracing  and  backtraces.   This 'Minisymbols' is a xz compressed section
              labeled .gnu_debugdata.  Support 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)