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authorRoland McGrath <roland@gnu.org>2003-03-15 23:16:22 +0000
committerRoland McGrath <roland@gnu.org>2003-03-15 23:16:22 +0000
commit45e4762c2c7d04cd51213735c2b440c94cdcf28a (patch)
tree5b2c7f008ae7f0a787bf6798bbb7a8663bc7b0ed /dlfcn/dlfcn.h
parent124dcac84b992d26cfe992f9017f49e92c37add2 (diff)
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* dlfcn/tst-dlinfo.c: New file.
* dlfcn/Makefile (tests): Add tst-dlinfo. ($(objpfx)tst-dlinfo): New target. * dlfcn/dlinfo.c: New file. * dlfcn/Makefile (libdl-routines): Add it. * dlfcn/Versions (libdl: GLIBC_2.3.3): Add dlinfo. * dlfcn/dlfcn.h [__USE_GNU]: Declare dlinfo. [__USE_GNU] (RTLD_DI_*): New enum constants. [__USE_GNU] (Dl_serpath, Dl_serinfo): New types. * elf/dl-load.c (cache_rpath): New inline function. (_dl_map_object): Use it. (_dl_rtld_di_serinfo): New function. * sysdeps/generic/ldsodefs.h: Declare it. * elf/Versions (ld: GLIBC_PRIVATE): Add it.
Diffstat (limited to 'dlfcn/dlfcn.h')
-rw-r--r--dlfcn/dlfcn.h54
1 files changed, 53 insertions, 1 deletions
diff --git a/dlfcn/dlfcn.h b/dlfcn/dlfcn.h
index 6c8e4ab..9d8ee0d 100644
--- a/dlfcn/dlfcn.h
+++ b/dlfcn/dlfcn.h
@@ -21,6 +21,8 @@
#define _DLFCN_H 1
#include <features.h>
+#define __need_size_t
+#include <stddef.h>
/* Collect various system dependent definitions and declarations. */
#include <bits/dlfcn.h>
@@ -100,7 +102,57 @@ enum
RTLD_DL_LINKMAP = 2
};
-#endif
+
+/* Get information about the shared object HANDLE refers to.
+ REQUEST is from among the values below, and determines the use of ARG.
+
+ On success, returns zero. On failure, returns -1 and records an error
+ message to be fetched with `dlerror'. */
+extern int dlinfo (void *__restrict __handle,
+ int __request, void *__restrict __arg);
+
+/* These are the possible values for the REQUEST argument to `dlinfo'. */
+enum
+ {
+ /* Treat ARG as `struct link_map **';
+ store the `struct link_map *' for HANDLE there. */
+ RTLD_DI_LINKMAP = 2,
+
+ /* Treat ARG as `Dl_serinfo *' (see below), and fill in to describe the
+ directories that will be searched for dependencies of this object.
+ RTLD_DI_SERINFOSIZE fills in just the `dls_cnt' and `dls_size'
+ entries to indicate the size of the buffer that must be passed to
+ RTLD_DI_SERINFO to fill in the full information. */
+ RTLD_DI_SERINFO = 4,
+ RTLD_DI_SERINFOSIZE = 5,
+
+ /* Treat ARG as `char *', and store there the directory name used to
+ expand $ORIGIN in this shared object's dependency file names. */
+ RTLD_DI_ORIGIN = 6,
+
+ RTLD_DI_LMID = 1, /* Unsupported, defined by Solaris. */
+ RTLD_DI_CONFIGADDR = 3 /* Unsupported, defined by Solaris. */
+ };
+
+
+/* This is the type of elements in `Dl_serinfo', below.
+ The `dls_name' member points to space in the buffer passed to `dlinfo'. */
+typedef struct
+{
+ char *dls_name; /* Name of library search path directory. */
+ unsigned int dls_flags; /* Indicates where this directory came from. */
+} Dl_serpath;
+
+/* This is the structure that must be passed (by reference) to `dlinfo' for
+ the RTLD_DI_SERINFO and RTLD_DI_SERINFOSIZE requests. */
+typedef struct
+{
+ size_t dls_size; /* Size in bytes of the whole buffer. */
+ unsigned int dls_cnt; /* Number of elements in `dls_serpath'. */
+ Dl_serpath dls_serpath[1]; /* Actually longer, dls_cnt elements. */
+} Dl_serinfo;
+#endif /* __USE_GNU */
+
__END_DECLS