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Date: Sat, 11 Feb 2023 12:51:47 +0000
From: Bastian Bittorf <bb@....de>
To: musl@...ts.openwall.com
Cc: mailinglist <openwrt-devel@...ts.openwrt.org>
Subject: busybox problem on powerpc PPC/32bit (hardware TP-Link-WDR-4900-v1)
With OpenWRT i recognized a strange behavior of ash-shell scripts.
It happens only on target PowerPC, e.g. m68k, arm, mips, x86 are
unaffected.
The visible strange behavior in 'ash' is:
$ test A -gt 5 && echo OK
ash: A: out of range
OK
Ofcourse this wrong returncode leads to all sorts of things...
I tested several busybox releases (1.33.2, 1.35.0, 1.36.0) and
crosscompiled with musl-git-b76f37f (from musl.cc) and
crosscompiled with glibc: powerpc-linux-gnu-gcc (Debian-12.2.0)
(it's the same for all versions)
The resulting linux + busybox images ready for QEMU are here:
http://intercity-vpn.de/mpc85xx/
If needed i can provide build instructions.
Maybe somebody with more powerpc assembly knowledge can help here.
The underlying code is here:
https://git.busybox.net/busybox/tree/coreutils/test.c#n488
But i can not spot the error:
static number_t getn(const char *s)
{
char *p;
errno = 0;
r = strtol(s, &p, 10);
if (errno != 0)
syntax(s, "out of range");
return r;
}
Best Greetings,
Bastian Bittorf
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