GNU C Library master sources branch master updated. glibc-2.25-305-g17284d6

[siddhesh at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=17284d650ebe5c736c9730ee16401008f26128c3

commit 17284d650ebe5c736c9730ee16401008f26128c3
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Thu May 11 20:13:49 2017 +0530

    tunables: Make tunable_list relro
    
    As of now we don't need tunables to be writable after they have been
    set initially, so there is no point in having them writable.  Put
    tunable_list in .data.rel.ro so that it is set as read-only after
    relocation.  This also allows us to move some of the dl_* variables
    that are tunables controlled into the tunables infrastructure instead
    of having two copies.
    
    In future if we ever need specific tunables to be writable at runtime,
    we can split the tunable_list into two.
    
    Regression tested on x86_64 to verify that tests continue to pass.
    
    	* scripts/gen-tunables.awk: Add attribute_relro to
    	tunable_list.

diff --git a/ChangeLog b/ChangeLog
index d886161..f92e871 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-11  Siddhesh Poyarekar  <siddhesh@sourceware.org>
+
+	* scripts/gen-tunables.awk: Add attribute_relro to
+	tunable_list.
+
 2017-05-11  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #21457]
diff --git a/scripts/gen-tunables.awk b/scripts/gen-tunables.awk
index 601240a..defb3e7 100644
--- a/scripts/gen-tunables.awk
+++ b/scripts/gen-tunables.awk
@@ -141,7 +141,7 @@ END {
 
   # Finally, the tunable list.
   print "\n#ifdef TUNABLES_INTERNAL"
-  print "static tunable_t tunable_list[] = {"
+  print "static tunable_t tunable_list[] attribute_relro = {"
   for (t in types) {
     for (n in types[t]) {
       for (m in types[t][n]) {

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                |    5 +++++
 scripts/gen-tunables.awk |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)


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