[newlib-cygwin/main] Cygwin: Define and use __WCOREFLAG

[Jon Turney <jturney@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=a83b93e662b0e65fd181ed50de7e960b311f4a94

commit a83b93e662b0e65fd181ed50de7e960b311f4a94
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Wed Jan 10 20:35:49 2024 +0000

    Cygwin: Define and use __WCOREFLAG
    
    Also fix a typo in description of exit status

Diff:
---
 winsup/cygwin/exceptions.cc         | 2 +-
 winsup/cygwin/include/cygwin/wait.h | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index 36f6a476a..362ad69a5 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -1334,7 +1334,7 @@ signal_exit (int sig, siginfo_t *si, void *)
 	if (cygheap->rlim_core == 0Ul)
 	  break;
 
-	sig |= 0x80; /* Set flag in exit status to show that we've "dumped core" */
+	sig |= __WCOREFLAG; /* Set flag in exit status to show that we've "dumped core" */
 
 	/* If core dump size is >1MB, try to invoke dumper to write a
 	   .core file */
diff --git a/winsup/cygwin/include/cygwin/wait.h b/winsup/cygwin/include/cygwin/wait.h
index 7e40c8d6c..0d42e8920 100644
--- a/winsup/cygwin/include/cygwin/wait.h
+++ b/winsup/cygwin/include/cygwin/wait.h
@@ -16,12 +16,13 @@ details. */
 #define WUNTRACED 2
 #define WCONTINUED 8
 #define __W_CONTINUED	0xffff
+#define __WCOREFLAG 0x80
 
 /* A status is 16 bits, and looks like:
       <1 byte info> <1 byte code>
 
       <code> == 0, child has exited, info is the exit value
-      <code> == 1..7e, child has exited, info is the signal number.
+      <code> == 1..7e, child has exited, code is the signal number.
       <code> == 7f, child has stopped, info was the signal number.
       <code> == 80, there was a core dump.
 */
@@ -34,6 +35,6 @@ details. */
 #define WEXITSTATUS(_w)		(((_w) >> 8) & 0xff)
 #define WTERMSIG(_w)		((_w) & 0x7f)
 #define WSTOPSIG		WEXITSTATUS
-#define WCOREDUMP(_w)		(WIFSIGNALED(_w) && ((_w) & 0x80))
+#define WCOREDUMP(_w)		(WIFSIGNALED(_w) && ((_w) & __WCOREFLAG))
 
 #endif /* _CYGWIN_WAIT_H */