hppa: fix loading of global pointer in _start [BZ #20277]

The patched change fixes a regression for executables compiled with the
-p option and linked with gcrt1.o.  The executables crash on startup.

This regression was introduced in 2.22 and was noticed in the gcc testsuite.

(cherry picked from commit 9765ffa71030efd8bb4f2ea4ed6e020fcb4bb714)

diff --git a/ChangeLog b/ChangeLog
index d92460831ae380813b9e777cf0e59197a7dc3c94..c2c8d7e5216ed2643da505cae9915a13d884d574 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2016-06-30  John David Anglin  <danglin@gcc.gnu.org>
+
+       [BZ #20277]
+       * sysdeps/hppa/start.S (_start): Correct loading of global pointer
+       when SHARED is defined.
+
 2016-06-30  Aurelien Jarno  <aurelien@aurel32.net>
 
        * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Regenerated.

diff --git a/NEWS b/NEWS
index 532cfe2f626d24302dfdfc5e2a77f66f36d582e6..07f3fe8569de35a67cce2835eb2be39fae43e053 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -34,6 +34,7 @@ The following bugs are resolved with this release:
   [19822] libm.so install clobbers old version
   [19879] network: nss_dns: Stack overflow in getnetbyname implementation
     (CVE-2016-3075)
+  [20177] $dp is not initialized correctly in sysdeps/hppa/start.S
 
 \f
 Version 2.23

diff --git a/sysdeps/hppa/start.S b/sysdeps/hppa/start.S
index 90d4331f5ab9696785d7361d8ff63e69e80d1ee3..b7ab830e9245d60dd4a80f949650c9a49d6bca52 100644 (file)
--- a/sysdeps/hppa/start.S
+++ b/sysdeps/hppa/start.S
@@ -131,8 +131,10 @@ _start:
        stw     %sp, -60(%sp)
 
 #ifdef SHARED
+       /* load global */
        addil   LT'.Lp__global, %r19
        ldw     RT'.Lp__global(%r1), %dp
+       ldw     0(%dp), %dp
 #else
        /* load global */
        ldil    L%$global$, %dp