FM / dyninst

/usr/share/systemtap/runtime/dyninst

Name	Size	Mode	Actions
addr-map.c	565	0644	edit dl rm
alloc.c	1188	0644	edit dl rm
arith.c	2291	0644	edit dl rm
common_session_state.h	6921	0644	edit dl rm
copy.c	4095	0644	edit dl rm
debug.h	413	0644	edit dl rm
ilog2.h	2943	0644	edit dl rm
io.c	4541	0644	edit dl rm
linux_defs.h	5602	0644	edit dl rm
linux_hash.h	1877	0644	edit dl rm
linux_types.h	654	0644	edit dl rm
loc2c-runtime.h	2494	0644	edit dl rm
map_list.h	1059	0644	edit dl rm
map_runtime.h	5160	0644	edit dl rm
namespaces.h	0	0644	edit dl rm
offptr.h	4788	0644	edit dl rm
offset_list.h	4428	0644	edit dl rm
perf.c	0	0644	edit dl rm
print.c	2700	0644	edit dl rm
probe_lock.h	1849	0644	edit dl rm
regs.c	2557	0644	edit dl rm
runtime.h	10292	0644	edit dl rm
runtime_context.h	6556	0644	edit dl rm
runtime_defines.h	280	0644	edit dl rm
session_attributes.c	1717	0644	edit dl rm
session_attributes.h	772	0644	edit dl rm
shm.c	6171	0644	edit dl rm
stapdyn.h	4617	0644	edit dl rm
stat_runtime.h	1832	0644	edit dl rm
sym.c	1621	0644	edit dl rm
task_finder.c	0	0644	edit dl rm
timer.c	2770	0644	edit dl rm
transport.c	31128	0644	edit dl rm
transport.h	3968	0644	edit dl rm
unwind.c	0	0644	edit dl rm
uprobes-regs.c	3163	0644	edit dl rm
uprobes.c	1798	0644	edit dl rm
uprobes.h	953	0644	edit dl rm

Edit: /usr/share/systemtap/runtime/dyninst/sym.c (1621B)

struct task_struct;
#include "../sym.h"
#include <assert.h>
#include <elfutils/libdwfl.h>

typedef struct
{
  char *fn;
  unsigned long offset;
} module_args;

static int
module_callback (Dwfl_Module *mod, void **userdata __attribute__((unused)),
                 const char *name, Dwarf_Addr start, void *arg)
{
  module_args *modargs = (module_args*)arg;
  if (strcmp (modargs->fn, name) == 0)
    {
      modargs->offset += start;
      return DWARF_CB_ABORT;
    }

return DWARF_CB_OK;
}

static unsigned long _stp_umodule_relocate(const char *path,
                                           unsigned long offset,
                                           struct task_struct *task)
{
  static char *debuginfo_path;
  static const Dwfl_Callbacks proc_callbacks =
    {
      .find_debuginfo = dwfl_standard_find_debuginfo,
      .debuginfo_path = &debuginfo_path,

.find_elf = dwfl_linux_proc_find_elf,
    };
  Dwfl *dwfl = dwfl_begin (&proc_callbacks);
  if (dwfl == NULL)
    _stp_error ("dwfl_begin: %s", dwfl_errmsg (-1));

int result = dwfl_linux_proc_report (dwfl, getpid());
  if (result < 0)
    _stp_error ("dwfl_linux_proc_report: %s", dwfl_errmsg (-1));
  else if (result > 0)
    _stp_error ("dwfl_linux_proc_report");

if (dwfl_report_end (dwfl, NULL, NULL) != 0)
    _stp_error ("dwfl_report_end: %s", dwfl_errmsg (-1));

module_args modargs =
     {
       .fn = (char*)path,
       .offset = offset
     };

if (dwfl_getmodules (dwfl, module_callback, &modargs, 0) == -1)
     _stp_error ("dwfl_getmodules: %s", dwfl_errmsg (-1));
   dwfl_end (dwfl);
   return modargs.offset;
}

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