Re: [PULL 11/24] tcg/optimize: Use tcg_constant_internal with constant folding

[Laurent Vivier]

On 16/01/2021 18:24, Richard Henderson wrote:
> On 1/15/21 1:03 PM, Alistair Francis wrote:
>> I run QEMU with these arguments:
>>
>> ./build/riscv32-softmmu/qemu-system-riscv32 \
>>     -machine virt -serial mon:stdio -serial null -nographic \
>>     -append "root=/dev/vda rw highres=off  console=ttyS0 ip=dhcp 
>> earlycon=sbi" \
>>     -device virtio-net-device,netdev=net0,mac=52:54:00:12:34:02
>> -netdev user,id=net0 \
>>     -object rng-random,filename=/dev/urandom,id=rng0 -device
>> virtio-rng-device,rng=rng0 \
>>     -smp 4 -d guest_errors -m 256M \
>>     -kernel ./Image \
>>     -drive 
>> id=disk0,file=./core-image-minimal-qemuriscv32.ext4,if=none,format=raw
>> \
>>     -device virtio-blk-device,drive=disk0 \
>>     -bios default
>>
>> I am uploading the images to:
>> https://nextcloud.alistair23.me/index.php/s/MQFyGGNLPZjLZPH
> 
> I don't replicate the assertion failure, I get to
> 
> /sbin/init: error while loading shared libraries: libkmod.so.2: cannot open
> shared object file: Error 74
> [    0.819845] Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x00007f00
> [    0.820430] CPU: 1 PID: 1 Comm: init Not tainted 5.11.0-rc3 #1

This commit breaks the build of my hello world test program with 
mips64el/stretch guest
(and I guess some others too).

cat > $CHROOT/tmp/hello.c <<EOF
#include <stdio.h>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
EOF

unshare --time --ipc --uts --pid --fork --kill-child --mount --mount-proc 
--root \
        $CHROOT gcc /tmp/hello.c -o /tmp/hello
/tmp/hello.c:1:0: internal compiler error: Segmentation fault
 #include <stdio.h>

executable file is not ELF
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.

# gcc --version
gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Any idea?

Thanks,
Laurent