Support _r_debug for static binaries.

We initialize _r_debug for static binaries to allows debug
agents to treat static binaries a little more like dyanmic
ones. This simplifies the work a debug agent has to do to
access TLS in a static binary via libthread_db.

Tested on x86_64.

See:
https://sourceware.org/ml/libc-alpha/2014-04/msg00183.html

	[BZ #16831]
	* csu/libc-start.c (LIBC_START_MAIN) [!SHARED]: Call
	_dl_debug_initialize.

diff --git a/ChangeLog b/ChangeLog
index 77fc36e..d16da4e 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2014-04-14  Carlos O'Donell  <carlos@redhat.com>
 
+       [BZ #16831]
+       * csu/libc-start.c (LIBC_START_MAIN) [!SHARED]: Call
+       _dl_debug_initialize.
+
+2014-04-14  Carlos O'Donell  <carlos@redhat.com>
+
        * configure.ac: Remove SELinux header check.
        * configure: Regenerate.
        * nscd/selinux.c (perms): Array of const char* to permission names.

diff --git a/NEWS b/NEWS
index bbcc223..a63b425 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -14,7 +14,7 @@ Version 2.20
   16610, 16611, 16613, 16623, 16632, 16634, 16639, 16642, 16648, 16649,
   16670, 16674, 16677, 16680, 16683, 16689, 16695, 16701, 16706, 16707,
   16712, 16713, 16714, 16731, 16739, 16743, 16758, 16759, 16760, 16770,
-  16786, 16789, 16799, 16800, 16815, 16838.
+  16786, 16789, 16799, 16800, 16815, 16831, 16838.
 
 * Running the testsuite no longer terminates as soon as a test fails.
   Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,

diff --git a/csu/libc-start.c b/csu/libc-start.c
index 3b7092b..d571a1a 100644 (file)
--- a/csu/libc-start.c
+++ b/csu/libc-start.c
@@ -264,6 +264,9 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
     GLRO(dl_debug_printf) ("\ntransferring control: %s\n\n", argv[0]);
 #endif
 
+#ifndef SHARED
+  _dl_debug_initialize (0, LM_ID_BASE);
+#endif
 #ifdef HAVE_CLEANUP_JMP_BUF
   /* Memory for the cancellation buffer.  */
   struct pthread_unwind_buf unwind_buf;