--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/components/libsigsegv/patches/stackvma-procfs.c.patch Thu Apr 24 19:38:57 2014 -0700
@@ -0,0 +1,123 @@
+#
+# This patch converts libsigsegv from using the obsolete (since Solaris 2.6,
+# 1997) ioctl-based version of the /proc interface to using the structured
+# /proc interface as described in the proc(4) manual page.
+# See libsigsegv bug: https://savannah.gnu.org/bugs/?42187
+#
+diff -r -u libsigsegv-2.6/configure.orig libsigsegv-2.6/configure
+--- libsigsegv-2.6/configure.orig 2008-08-24 15:58:15.000000000 -0700
++++ libsigsegv-2.6/configure 2014-04-10 11:02:03.212637829 -0700
+@@ -15596,8 +15596,8 @@
+ _ACEOF
+
+
+-{ $as_echo "$as_me:$LINENO: checking for PIOCMAP in sys/procfs.h" >&5
+-$as_echo_n "checking for PIOCMAP in sys/procfs.h... " >&6; }
++{ $as_echo "$as_me:$LINENO: checking for prmap_t in procfs.h" >&5
++$as_echo_n "checking for prmap_t in procfs.h... " >&6; }
+ if test "${sv_cv_procfsvma+set}" = set; then
+ $as_echo_n "(cached) " >&6
+ else
+@@ -15608,12 +15608,11 @@
+ cat confdefs.h >>conftest.$ac_ext
+ cat >>conftest.$ac_ext <<_ACEOF
+ /* end confdefs.h. */
+-#include <sys/procfs.h>
++#include <procfs.h>
+ int
+ main ()
+ {
+-int x = PIOCNMAP + PIOCMAP; prmap_t y;
+- ;
++ prmap_t y;
+ return 0;
+ }
+ _ACEOF
+diff -r -u libsigsegv-2.6/configure.ac.orig libsigsegv-2.6/configure.ac
+--- libsigsegv-2.6/configure.ac.orig 2014-04-10 10:55:23.907673765 -0700
++++ libsigsegv-2.6/configure.ac 2014-04-10 11:02:35.810560742 -0700
+@@ -619,9 +619,9 @@
+ STACK_DIRECTION = 0 => spaghetti stack.])
+
+ dnl Determination of the stack's virtual memory area.
+-AC_CACHE_CHECK([for PIOCMAP in sys/procfs.h], sv_cv_procfsvma, [
+- AC_TRY_LINK([#include <sys/procfs.h>],
+- [int x = PIOCNMAP + PIOCMAP; prmap_t y;],
++AC_CACHE_CHECK([for prmap_t in procfs.h], sv_cv_procfsvma, [
++ AC_TRY_LINK([#include <procfs.h>],
++ [ prmap_t y;],
+ sv_cv_procfsvma=yes, sv_cv_procfsvma=no)
+ ])
+ AC_CHECK_FUNCS([mincore])
+diff -r -u libsigsegv-2.6/src/stackvma-procfs.c.orig libsigsegv-2.6/src/stackvma-procfs.c
+--- libsigsegv-2.6/src/stackvma-procfs.c.orig 2014-04-10 11:05:58.957104341 -0700
++++ libsigsegv-2.6/src/stackvma-procfs.c 2014-04-10 10:49:41.584900672 -0700
+@@ -19,8 +19,9 @@
+ #include <unistd.h> /* open, close */
+ #include <fcntl.h> /* open */
+ #include <sys/types.h>
++#include <sys/stat.h>
+ #include <sys/mman.h> /* mmap, munmap */
+-#include <sys/procfs.h> /* PIOC*, prmap_t */
++#include <procfs.h> /* prmap_t */
+
+ #include "stackvma-simple.c"
+
+@@ -43,10 +44,7 @@
+ int
+ sigsegv_get_vma (unsigned long address, struct vma_struct *vma)
+ {
+- char fnamebuf[6+10+1];
+- char *fname;
+ int fd;
+- int nmaps;
+ size_t memneed;
+ #if HAVE_MMAP_ANON
+ # define zero_fd -1
+@@ -58,6 +56,7 @@
+ int zero_fd;
+ # define map_flags 0
+ #endif
++ struct stat statb;
+ void *auxmap;
+ unsigned long auxmap_start;
+ unsigned long auxmap_end;
+@@ -71,26 +70,14 @@
+ if (pagesize == 0)
+ init_pagesize ();
+
+- /* Construct fname = sprintf (fnamebuf+i, "/proc/%u", getpid ()). */
+- fname = fnamebuf + sizeof (fnamebuf) - 1;
+- *fname = '\0';
+- {
+- unsigned int value = getpid ();
+- do
+- *--fname = (value % 10) + '0';
+- while ((value = value / 10) > 0);
+- }
+- fname -= 6;
+- memcpy (fname, "/proc/", 6);
+-
+- fd = open (fname, O_RDONLY);
++ fd = open ("/proc/self/map", O_RDONLY);
+ if (fd < 0)
+ goto failed;
+
+- if (ioctl (fd, PIOCNMAP, &nmaps) < 0)
++ if (fstat(fd, &statb) == -1)
+ goto fail2;
+
+- memneed = (nmaps + 10) * sizeof (prmap_t);
++ memneed = statb.st_size + 10 * sizeof (prmap_t);
+ /* Allocate memneed bytes of memory.
+ We cannot use alloca here, because we are low on stack space.
+ We also cannot use malloc here, because a malloc() call may have been
+@@ -112,7 +99,7 @@
+ auxmap_end = auxmap_start + memneed;
+ maps = (prmap_t *) auxmap;
+
+- if (ioctl (fd, PIOCMAP, maps) < 0)
++ if (read(fd, (void *)maps, memneed) <= 0)
+ goto fail1;
+
+ #if STACK_DIRECTION < 0