Willy Tarreau 9899cea591 tools/nolibc: fix incorrect truncation of exit code ... commit de0244ae40 upstream. Ammar Faizi reported that our exit code handling is wrong. We truncate it to the lowest 8 bits but the syscall itself is expected to take a regular 32-bit signed integer, not an unsigned char. It's the kernel that later truncates it to the lowest 8 bits. The difference is visible in strace, where the program below used to show exit(255) instead of exit(-1): int main(void) { return -1; } This patch applies the fix to all archs. x86_64, i386, arm64, armv7 and mips were all tested and confirmed to work fine now. Risc-v was not tested but the change is trivial and exactly the same as for other archs. Reported-by: Ammar Faizi <ammar.faizi@students.amikom.ac.id> Cc: stable@vger.kernel.org Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-01-27 11:02:51 +01:00
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nolibc.h	tools/nolibc: fix incorrect truncation of exit code	2022-01-27 11:02:51 +01:00