From: наб <nabijaczleweli@nabijaczleweli.xyz>
Date: Mon, 26 Sep 2022 15:15:54 +0000 (+0200)
Subject: a.out: restore CMAGIC
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cdc7daa9e3e102fc650321c8c0d2d8cf0ced3910;p=linux.git

a.out: restore CMAGIC

Part of UAPI and the on-disk format:
this means that it's not a magic number per magic-number.rst,
and it's best to leave it untouched to avoid breaking userspace
and suffer the same fate as a.out in general

Fixes: 53c2bd679017 ("a.out: remove define-only CMAGIC, previously magic number")
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/20220926151554.7gxd6unp5727vw3c@tarta.nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/uapi/linux/a.out.h b/include/uapi/linux/a.out.h
index bb15da96df2a1..5fafde3798e57 100644
--- a/include/uapi/linux/a.out.h
+++ b/include/uapi/linux/a.out.h
@@ -70,6 +70,9 @@ enum machine_type {
    The first page is unmapped to help trap NULL pointer references */
 #define QMAGIC 0314
 
+/* Code indicating core file.  */
+#define CMAGIC 0421
+
 #if !defined (N_BADMAG)
 #define N_BADMAG(x)	  (N_MAGIC(x) != OMAGIC		\
 			&& N_MAGIC(x) != NMAGIC		\