qemu-system-arm: ../accel/tcg/cpu-exec.c:917: cpu_loop_exec_tb: Assertion `icount_enabled()' failed.
Host environment
- Operating system: Debian/Sid
- OS/kernel version: Linux noys4 6.1.0-6-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.15-1 (2023-03-05) x86_64 GNU/Linux
- Architecture: x86_64
- QEMU flavor: qemu-system-arm
- QEMU version: QEMU emulator version 7.2.90 (v8.0.0-rc0-31-g61b0608b68-dirty)
- QEMU command line:
qemu-system-arm \ -kernel /path/to/bootstrap.elf \ -serial stdio \ -display none \ -m 1536 \ -cpu cortex-a15 \ -smp 1,cores=1,maxcpus=1 \ -machine virt,virtualization=true \ -machine highmem=off
Emulated/Virtualized environment
- Operating system: Custom (L4Re)
- OS/kernel version: Git
- Architecture: ARM
Description of problem
When starting the guest, the mentioned assertion is triggered very soon:
qemu-system-arm: ../accel/tcg/cpu-exec.c:917: cpu_loop_exec_tb: Assertion `icount_enabled()' failed.
I'm able to successfully boot the same image with QEMU 7.2.0.
The last output from the qemu logging with -d guest_errors,in_asm,int,pcall,cpu
is
----------------
IN:
0x40209100: e92d4ff0 push {r4, r5, r6, r7, r8, sb, sl, fp, lr}
0x40209104: e28db020 add fp, sp, #0x20
0x40209108: e24b3f49 sub r3, fp, #0x124
0x4020910c: e24ddf43 sub sp, sp, #0x10c
0x40209110: e1a0e00f mov lr, pc
0x40209114: e3e0f0ff mvn pc, #0xff
R00=4021000c R01=4020a5f8 R02=0000000f R03=40209100
R04=40210018 R05=40210018 R06=4020c000 R07=40002000
R08=00000000 R09=00000000 R10=00000000 R11=4020d7fc
R12=00000000 R13=4020d7f0 R14=4020074c R15=40209100
PSR=2000011f --C- A sys32
----------------
IN:
0xffffff00: ee1d0f50 mrc p15, #0, r0, c13, c0, #2
R00=4021000c R01=4020a5f8 R02=0000000f R03=4020d6c8
R04=40210018 R05=40210018 R06=4020c000 R07=40002000
R08=00000000 R09=00000000 R10=00000000 R11=4020d7ec
R12=00000000 R13=4020d6c0 R14=40209118 R15=ffffff00
PSR=2000011f --C- A sys32
Please note that the L4Re OS uses mvn pc, #0xff
to switch from EL1 to EL2 (system call).
Steps to reproduce
- Boot the attached image with the provided command line to trigger the assertion
Additional information
I will attach the bootstrap image to this ticket.