linux-kernel - [PATCH 0/2] tools/nolibc: fork: fix on s390 and add test

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Message-Id: <20230415-nolibc-fork-v1-0-9747c73651c5@weissschuh.net>
Date:   Sat, 15 Apr 2023 23:28:46 +0200
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 0/2] tools/nolibc: fork: fix on s390 and add test

The generic fork() implementation in nolibc falls back to the clone()
syscall. On s390 the first two arguments to clone() are swapped compared
to other architectures, breaking the implementation in nolibc.

Add a custom implementation of fork() to s390 that works.

While at it also add a testcase for fork().

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
Thomas Weißschuh (2):
      tools/nolibc: s390: provide custom implementation for sys_fork
      tools/nolibc: add testcase for fork()/waitpid()

 tools/include/nolibc/arch-s390.h             |  8 ++++++++
 tools/include/nolibc/sys.h                   |  2 ++
 tools/testing/selftests/nolibc/nolibc-test.c | 20 ++++++++++++++++++++
 3 files changed, 30 insertions(+)
---
base-commit: c1c4f33b6be9b3412d9e0ba01b367f4ffe47c379
change-id: 20230415-nolibc-fork-b7087a345166

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>