sparc: fix sigaction for 32bit builds [BZ #18694]

Commit a059d359d86130b5fa74e04a978c8523a0293f77 changed the sigaction
struct to pass conform tests, but it ended up also changing the ABI for
32 bit builds.  For 64 bit builds, changing the long to two ints works,
but for 32 bit builds, it inserts 4 extra bytes.  This leads to many
packages randomly failing like bash that spews things like:
	configure: line 471: wait_for: No record of process 0

Bracket the new member by a wordsize check to fix the ABI for 32bit.

(cherry picked from commit 7fde904c73c57faea48c9679bbdc0932d81b3a2f)

diff --git a/ChangeLog b/ChangeLog
index ccce486c9d6499bcc5403a8938fe36d855e1ec8d..d9cbce76d5b61181b768ac46b76171348929b46e 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2015-07-21  Mike Frysinger  <vapier@gentoo.org>
+
+       [BZ #18694]
+       * sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Include
+       bits/wordsize.h.
+       (sigaction): Declare __glibc_reserved0 only when __WORDSIZE is 64.
+
 2015-02-16  Paul Pluzhnikov  <ppluzhnikov@google.com>
 
        [BZ #16618]

diff --git a/NEWS b/NEWS
index 976f2ea0236ffa3e26c0b6ca1b5fb4810caf3818..b469ad2b501c0992a98d98cbcb23749a9e953dd1 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -10,7 +10,7 @@ Version 2.20.1
 * The following bugs are resolved with this release:
 
   16009, 16617, 16618, 17266, 17370, 17371, 17460, 17485, 17555, 17625,
-  17630, 17801.
+  17630, 17801, 18694.
 
 * CVE-2015-1472 Under certain conditions wscanf can allocate too little
   memory for the to-be-scanned arguments and overflow the allocated
@@ -29,6 +29,10 @@ Version 2.20.1
 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
   infinite loopif the DNS response contained a PTR record of an unexpected
   format.
+
+* The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 release.
+  It has been fixed to match 2.19 and older, but binaries built against 2.20
+  might need to be recompiled.  See BZ#18694.
 \f
 Version 2.20
 

diff --git a/sysdeps/unix/sysv/linux/sparc/bits/sigaction.h b/sysdeps/unix/sysv/linux/sparc/bits/sigaction.h
index 7a0ca7eea225aafe9bbd2ea4708c6ce32d9bebd4..b1b121d9b740e1ad7daaab80b0bf40ff007e299a 100644 (file)
--- a/sysdeps/unix/sysv/linux/sparc/bits/sigaction.h
+++ b/sysdeps/unix/sysv/linux/sparc/bits/sigaction.h
@@ -20,6 +20,8 @@
 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
 #endif
 
+#include <bits/wordsize.h>
+
 /* Structure describing the action to be taken when a signal arrives.  */
 struct sigaction
   {
@@ -43,7 +45,9 @@ struct sigaction
     __sigset_t sa_mask;
 
     /* Special flags.  */
+#if __WORDSIZE == 64
     int __glibc_reserved0;
+#endif
     int sa_flags;
 
     /* Not used by Linux/Sparc yet.  */