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a.out: restore CMAGIC

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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: 53c2bd6790 ("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>
This commit is contained in:
наб 2022-09-26 17:15:54 +02:00 committed by Greg Kroah-Hartman
parent aade55c860
commit cdc7daa9e3
1 changed files with 3 additions and 0 deletions
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3
include/uapi/linux/a.out.h
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@ -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 \