NAME | DESCRIPTION | SEE ALSO | COLOPHON

WARNING::SYMBOLS(7stap)                              WARNING::SYMBOLS(7stap)

NAME         top

       warning::symbols - systemtap missing-symbols warnings

DESCRIPTION         top

       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_debugda‐
              ta.  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         top

       stap(1),
       stappaths(7),
       strip(1),
       warning::debuginfo(7stap),
       error::dwarf(7stap),
       error::reporting(7stap),
       http://fedoraproject.org/wiki/Features/MiniDebugInfo 

COLOPHON         top

       This page is part of the systemtap (a tracing and live-system
       analysis tool) project.  Information about the project can be found
       at ⟨https://sourceware.org/systemtap/⟩.  If you have a bug report for
       this manual page, send it to systemtap@sourceware.org.  This page was
       obtained from the project's upstream Git repository 
       ⟨git://sourceware.org/git/systemtap.git⟩ on 2017-04-25.  If you dis‐
       cover any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org

                                                     WARNING::SYMBOLS(7stap)

Pages that refer to this page: warning::debuginfo(7stap)