Sorry for the delay. I added the sysroot, the binary and the files causing the segfault. Please let me know if there is something missing.
I used the following commands to let it run: export LD_LIBRARY_PATH=/opt/qemu-test/test1/lib /opt/qemu-test/test1/bin/qemu-arm "/opt/qemu-test/test1/files/mksnapshot.arm" --log-snapshot-positions --logfile "/tmp/snapshot.log" --random-seed 314159265 "/tmp/snapshot.cc" Thanks again! Fabian ** Attachment added: "Tarball containing sysroot, qemu binary and files" https://bugs.launchpad.net/qemu/+bug/1856837/+attachment/5317851/+files/qemu-segfault-v8.tar.xz -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1856837 Title: qemu 4.2.0 arm segmentation fault with gcc 9.2 Status in QEMU: New Bug description: As discussed with f4bug yesterday on IRC here comes the bug description. I'm building/configured qemu-4.2.0 on an x86_64 (gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516) with target-list "arm-softmmu,arm- linux-user" and debug enabled. I use the arm-linux-user variant, "qemu-arm". Then i'm trying to cross-compile (arm gcc) an old version of googles v8 (as i need this version of the lib for binary compatibility) which uses qemu during build. It worked with gcc 5.4.0 but not with 9.2.0. I also tried with 6.5.0, 7.4.0 and 8.3.0 but those are also causing the same segmentation fault. The executed command wich breaks qemu is: qemu-arm /tmp/build/out/arm.release/mksnapshot.arm --log-snapshot- positions --logfile /tmp/build/out/arm.release/obj.host/v8_snapshot/geni/snapshot.log --random-seed 314159265 /tmp/build/out/arm.release/obj.host/v8_snap The printed error message is: ARMv7=1 VFP3=1 VFP32DREGS=1 NEON=0 SUDIV=0 UNALIGNED_ACCESSES=1 MOVW_MOVT_IMMEDIATE_LOADS=0 USE_EABI_HARDFLOAT=1 qemu: uncaught target signal 11 (Segmentation fault) - core dumped Calling qemu with gdb gives the following information: Thread 1 "qemu-arm" received signal SIGSEGV, Segmentation fault. 0x0000555555d63d11 in static_code_gen_buffer () and (gdb) bt #0 0x0000555555d63d11 in static_code_gen_buffer () #1 0x0000555555628d58 in cpu_tb_exec (itb=<optimized out>, cpu=0x555557c33930) at /tmp/build/qemu/accel/tcg/cpu-exec.c:172 #2 cpu_loop_exec_tb (tb_exit=<synthetic pointer>, last_tb=<synthetic pointer>, tb=<optimized out>, cpu=0x555557c33930) at /tmp/build/qemu/accel/tcg/cpu-exec.c:618 #3 cpu_exec (cpu=cpu@entry=0x555557c2b660) at /tmp/build/qemu/accel/tcg/cpu-exec.c:731 #4 0x0000555555661578 in cpu_loop (env=0x555557c33930) at /tmp/build/qemu/linux-user/arm/cpu_loop.c:219 #5 0x00005555555d6d76 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /tmp/build/qemu/linux-user/main.c:865 Calling qemu-arm with debug switch "-d in_asm,int,op_opt" shows the log in the attached file. Thanks for any hints! Fabian To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1856837/+subscriptions
