From d78efd9f369a8fc46229fc9224e10e3781eecc43 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Wed, 1 Mar 2006 06:18:49 +0000
Subject: * elf/tst-tls-dlinfo.c: New file.

	* elf/Makefile (tests): Add it.
	($(objpfx)tst-tls-dlinfo): Depend on $(libdl).
	($(objpfx)tst-tls-dlinfo.out): Depend on $(objpfx)tst-tlsmod2.so.

	* dlfcn/dlfcn.h (RTLD_DI_PROFILENAME, RTLD_DI_PROFILEOUT): New enum
	values, reserve unsupported requested names used on Solaris.
	(RTLD_DI_TLS_MODID, RTLD_DI_TLS_DATA): New enum values.
	(RTLD_DI_MAX): Likewise.
	* dlfcn/dlinfo.c (dlinfo_doit): Handle RTLD_DI_TLS_MODID and
	RTLD_DI_TLS_DATA.

	* elf/dl-tls.c (_dl_tls_get_addr_soft): New function.
	* sysdeps/generic/ldsodefs.h: Declare it.
	* elf/Versions (ld: GLIBC_PRIVATE): Add it.
	* elf/link.h (struct dl_phdr_info): New members dlpi_tls_modid,
	dlpi_tls_data.
	* elf/dl-iteratephdr.c (__dl_iterate_phdr): Fill them in.

	* include/link.h: Don't copy contents from elf/link.h.
	Instead, #include it while #define'ing around link_map.
	* elf/dl-debug.c (_dl_debug_initialize): Add a cast.
	Add bogus extern decl to verify link_map members.
	* elf/loadtest.c (MAPS): New macro, cast _r_debug._r_map.
	(OUT, main): Use it in place of _r_debug._r_map.
	* elf/unload.c: Likewise.
	* elf/unload2.c: Likewise.
	* elf/neededtest.c (check_loaded_objects): Likewise.
	* elf/neededtest2.c (check_loaded_objects): Likewise.
	* elf/neededtest3.c (check_loaded_objects): Likewise.
	* elf/neededtest4.c (check_loaded_objects): Likewise.
	* elf/circleload1.c (check_loaded_objects): Likewise.
---
 dlfcn/dlfcn.h  | 21 +++++++++++++++++++--
 dlfcn/dlinfo.c | 24 +++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 3 deletions(-)

(limited to 'dlfcn')

diff --git a/dlfcn/dlfcn.h b/dlfcn/dlfcn.h
index 42c25b8b63..7e373eddf9 100644
--- a/dlfcn/dlfcn.h
+++ b/dlfcn/dlfcn.h
@@ -1,5 +1,6 @@
 /* User functions for run-time dynamic loading.
-   Copyright (C) 1995-1999,2000,2001,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1995-1999,2000,2001,2003,2004,2006
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -135,6 +136,8 @@ enum
        store the `struct link_map *' for HANDLE there.  */
     RTLD_DI_LINKMAP = 2,
 
+    RTLD_DI_CONFIGADDR = 3,	/* Unsupported, defined by Solaris.  */
+
     /* 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'
@@ -147,7 +150,21 @@ enum
        expand $ORIGIN in this shared object's dependency file names.  */
     RTLD_DI_ORIGIN = 6,
 
-    RTLD_DI_CONFIGADDR = 3	/* Unsupported, defined by Solaris.  */
+    RTLD_DI_PROFILENAME = 7,	/* Unsupported, defined by Solaris.  */
+    RTLD_DI_PROFILEOUT = 8,	/* Unsupported, defined by Solaris.  */
+
+    /* Treat ARG as `size_t *', and store there the TLS module ID
+       of this object's PT_TLS segment, as used in TLS relocations;
+       store zero if this object does not define a PT_TLS segment.  */
+    RTLD_DI_TLS_MODID = 9,
+
+    /* Treat ARG as `void **', and store there a pointer to the calling
+       thread's TLS block corresponding to this object's PT_TLS segment.
+       Store a null pointer if this object does not define a PT_TLS
+       segment, or if the calling thread has not allocated a block for it.  */
+    RTLD_DI_TLS_DATA = 10,
+
+    RTLD_DI_MAX = 10,
   };
 
 
diff --git a/dlfcn/dlinfo.c b/dlfcn/dlinfo.c
index 44af55a303..b1e2b009a5 100644
--- a/dlfcn/dlinfo.c
+++ b/dlfcn/dlinfo.c
@@ -1,5 +1,5 @@
 /* dlinfo -- Get information from the dynamic linker.
-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -32,6 +32,10 @@ dlinfo (void *handle, int request, void *arg)
 
 #else
 
+# ifdef USE_TLS
+#  include <dl-tls.h>
+# endif
+
 struct dlinfo_args
 {
   ElfW(Addr) caller;
@@ -90,6 +94,24 @@ RTLD_SELF used in code not dynamically loaded"));
     case RTLD_DI_ORIGIN:
       strcpy (args->arg, l->l_origin);
       break;
+
+    case RTLD_DI_TLS_MODID:
+      *(size_t *) args->arg = 0;
+#ifdef USE_TLS
+      *(size_t *) args->arg = l->l_tls_modid;
+#endif
+      break;
+
+    case RTLD_DI_TLS_DATA:
+      {
+	void *data = NULL;
+#ifdef USE_TLS
+	if (l->l_tls_modid != 0)
+	  data = _dl_tls_get_addr_soft (l);
+#endif
+	*(void **) args->arg = data;
+	break;
+      }
     }
 }
 
-- 
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