mdb_lookup_by_name() and mdb_lookup_by_obj()

int mdb_lookup_by_name(const char *name, GElf_Sym *sym);
int mdb_lookup_by_obj(const char *object, const char *name, GElf_Sym *sym);

Look up the specified symbol name and copy the ELF symbol information into the GElf_Sym pointed to by sym. If the symbol is found, the function returns 0; otherwise, -1 is returned. The name parameter specifies the symbol name. The object parameter tells the debugger where to look for the symbol. For the mdb_lookup_by_name() function, the object file defaults to MDB_OBJ_EXEC. For mdb_lookup_by_obj(), the object name should be one of the following:

MDB_OBJ_EXEC

Look in the executable's symbol table (.symtab section). For kernel crash dumps, this corresponds to the symbol table from the unix.X file or from /dev/ksyms.

MDB_OBJ_RTLD

Look in the runtime link-editor's symbol table. For kernel crash dumps, this corresponds to the symbol table for the krtld module.

MDB_OBJ_EVERY

Look in all known symbol tables. For kernel crash dumps, this includes the .symtab and .dynsym sections from the unix.X file or /dev/ksyms, as well as per-module symbol tables if these have been processed.

object

If the name of a particular load object is explicitly specified, the search is restricted to the symbol table of this object. The object can be named according to the naming convention for load objects described in "Symbol Name Resolution".