GNU C Library master sources branch master updated. glibc-2.19-224-g7bc5a74

[azanella at sourceware dot org]

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=7bc5a74162d044cc227b38ebf24e2d1d4594ecb8

commit 7bc5a74162d044cc227b38ebf24e2d1d4594ecb8
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date:   Wed Mar 19 15:30:18 2014 -0500

    Fix localplt check for GNU_IFUNC
    
    GNU_IFUNC are shown by readelf in 'Relocation section' value as
    "symbol()" instead of expected hexadecimal value. This causes the
    check-localplt script to ignore potential PLT stub begin generated
    by wrong IFUNC usage.  This patch changes the localplt script to
    emit such PLT cases.

diff --git a/ChangeLog b/ChangeLog
index e828cc2..a4aab10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2014-03-25 Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
 
+	* scripts/localplt.awk: Check for PLT generated by internal IFUNC
+	calls.
+
+2014-03-25 Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
 	* nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Revert
 	previous change.
 
diff --git a/scripts/localplt.awk b/scripts/localplt.awk
index 2265b02..f55c41a 100644
--- a/scripts/localplt.awk
+++ b/scripts/localplt.awk
@@ -32,9 +32,15 @@ $1 == "Offset" && $2 == "Info" { in_relocs = 1; next }
 NF == 0 { in_relocs = 0 }
 
 in_relocs && relocs_offset == jmprel_offset && NF >= 5 {
-  symval = strtonum("0x" $4);
-  if (symval != 0)
+  # Relocations against GNU_IFUNC symbols are not shown as an hexadecimal
+  # value, but rather as the resolver symbol followed by ().
+  if ($4 ~ /\(\)/) {
     print whatfile, $5
+  } else {
+    symval = strtonum("0x" $4);
+    if (symval != 0)
+      print whatfile, $5
+  }
 }
 
 in_relocs { next }

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

Summary of changes:
 ChangeLog            |    5 +++++
 scripts/localplt.awk |   10 ++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)


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