winsup/cygwin/
        * include/cygwin/signal.h (SIGIOT): Define SIGIOT in terms of SIGABRT.
        * strsig.cc (struct sigdesc): Ditto.

        winsup/doc/
        * utils.xml (kill): Document SIGIOT.

Signed-off-by: Yaakov Selkowitz <yselk...@redhat.com>
---
 winsup/cygwin/include/cygwin/signal.h | 1 +
 winsup/cygwin/strsig.cc               | 3 ++-
 winsup/doc/utils.xml                  | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/include/cygwin/signal.h 
b/winsup/cygwin/include/cygwin/signal.h
index 04ddb69..e876dec 100644
--- a/winsup/cygwin/include/cygwin/signal.h
+++ b/winsup/cygwin/include/cygwin/signal.h
@@ -358,6 +358,7 @@ struct sigaction
 #define        SIGILL  4       /* illegal instruction (not reset when caught) 
*/
 #define        SIGTRAP 5       /* trace trap (not reset when caught) */
 #define        SIGABRT 6       /* used by abort */
+#define        SIGIOT  SIGABRT /* synonym for SIGABRT on most systems */
 #define        SIGEMT  7       /* EMT instruction */
 #define        SIGFPE  8       /* floating point exception */
 #define        SIGKILL 9       /* kill (cannot be caught or ignored) */
diff --git a/winsup/cygwin/strsig.cc b/winsup/cygwin/strsig.cc
index 987e135..bb53e1b 100644
--- a/winsup/cygwin/strsig.cc
+++ b/winsup/cygwin/strsig.cc
@@ -26,7 +26,8 @@ struct sigdesc
   _s(SIGQUIT, "Quit"),                         /*  3 */ \
   _s(SIGILL, "Illegal instruction"),           /*  4 */ \
   _s(SIGTRAP, "Trace/breakpoint trap"),                /*  5 */ \
-  _s(SIGABRT, "Aborted"),                      /*  6 */ \
+  _s2(SIGABRT, "Aborted",                      /*  6 */ \
+      SIGIOT, "Aborted"),                               \
   _s(SIGEMT, "EMT instruction"),               /*  7 */ \
   _s(SIGFPE, "Floating point exception"),      /*  8 */ \
   _s(SIGKILL, "Killed"),                       /*  9 */ \
diff --git a/winsup/doc/utils.xml b/winsup/doc/utils.xml
index a00384e..501d248 100644
--- a/winsup/doc/utils.xml
+++ b/winsup/doc/utils.xml
@@ -741,6 +741,7 @@ SIGQUIT      3    quit
 SIGILL       4    illegal instruction (not reset when caught)
 SIGTRAP      5    trace trap (not reset when caught)
 SIGABRT      6    used by abort
+SIGIOT       6    another name for SIGABRT
 SIGEMT       7    EMT instruction
 SIGFPE       8    floating point exception
 SIGKILL      9    kill (cannot be caught or ignored)
-- 
2.7.0

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