On 8/29/24 04:38, Richard Henderson wrote:
On 8/29/24 03:12, Helge Deller wrote:
Hi Richard,
I tested qemu-user from v9.1-rc4 for hppa and noticed that it crashes
immediately when starting a hppa chroot.
I was able to bisect the segfault back to
commit 081a0ed188d8d9d9038f00337d331d185a7ae331
Author: Richard Henderson <richard.hender...@linaro.org>
Date: Wed Mar 27 13:04:00 2024 -1000
target/hppa: Do not mask in copy_iaoq_entry
This commit does not apply to git head any longer, but when I instead
apply this (modified) patch the segfault vanishes:
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -664,6 +664,11 @@ static void copy_iaoq_entry(DisasContext *ctx, TCGv_i64
dest,
const DisasIAQE *src)
{
tcg_gen_addi_i64(dest, src->base ? : cpu_iaoq_f, src->disp);
+
+#if CONFIG_USER_ONLY
+ uint64_t mask = gva_offset_mask(ctx->tb_flags);
+ tcg_gen_andi_i64(dest, dest, mask);
+#endif
}
Any idea or suggestion to fix it?
More specifics are required.
root@stoup:/opt/chroot/hppa/sid# ./qemu-hppa -L . ./bin/echo foo
foo
You need to build a static binary of qemu-hppa and register it with binfmt.
On x86 debian machine I do (as root user):
modprobe binfmt_misc
echo -1 > /proc/sys/fs/binfmt_misc/qemu-hppa # temporarily unregister hppa
binfmt
mv -f /usr/bin/qemu-hppa-static /usr/bin/qemu-hppa-static.old # save away old
to be able to copy new
cp build/qemu-hppa /usr/bin/qemu-hppa-static # COPY NEW STATIC BINARY IN
PLACE (you need to copy yours!)
# register at binfmt:
echo ':qemu-hppa:M::'\
'\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f:'\
'\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:'\
'/usr/bin/qemu-hppa-static:POCF' > /proc/sys/fs/binfmt_misc/register
Then you should be able to chroot into your sid chroot and you should get a
shell prompt:
chroot /opt/chroot/hppa/sid
With git head this segfaults for me.
Helge
