diff options
Diffstat (limited to 'crypto/dso/dso.h')
| -rw-r--r-- | crypto/dso/dso.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/crypto/dso/dso.h b/crypto/dso/dso.h index 10efa4ac8d..c1d0dfeebb 100644 --- a/crypto/dso/dso.h +++ b/crypto/dso/dso.h @@ -173,9 +173,8 @@ typedef struct dso_meth_st /* Return pathname of the module containing location */ int (*pathbyaddr)(void *addr,char *path,int sz); - /* Perform global symbol lookup, i.e. among *all* modules, - * see commentray in dso_lib.c for further details. */ - DSO_FUNC_TYPE (*globallookup)(const char *symname); + /* Perform global symbol lookup, i.e. among *all* modules */ + void *(*globallookup)(const char *symname); } DSO_METHOD; /**********************************************************************/ @@ -313,6 +312,16 @@ DSO_METHOD *DSO_METHOD_vms(void); */ int DSO_pathbyaddr(void *addr,char *path,int sz); +/* This function should be used with caution! It looks up symbols in + * *all* loaded modules and if module gets unloaded by somebody else + * attempt to dereference the pointer is doomed to have fatal + * consequences. Primary usage for this function is to probe *core* + * system functionality, e.g. check if getnameinfo(3) is available + * at run-time without bothering about OS-specific details such as + * libc.so.versioning or where does it actually reside: in libc + * itself or libsocket. */ +void *DSO_global_lookup(const char *name); + /* BEGIN ERROR CODES */ /* The following lines are auto generated by the script mkerr.pl. Any changes * made after this point may be overwritten when the script is next run. |