Re: [Qemu-devel] x86_64 linux kernel doesn't boot with -icount enabled

[Max Filippov]

> b/o the following infinite recursion:
>
> (gdb) bt
> #0  0x081b9564 in clz32 (val=0) at
> /home/jcmvbkbc/ws/xtensa/qemu-xtensa/host-utils.h:53
> #1  0x081b97c2 in fls_bit (value=65536) at
> /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:121
> #2  0x081ba16d in get_highest_priority_int (tab=0x89cec54) at
> /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:346
> #3  0x081ba275 in apic_irq_pending (s=0x89cdea8) at
> /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:383
> #4  0x081ba301 in apic_update_irq (s=0x89cdea8) at
> /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:401
> #5  0x081ba492 in apic_set_irq (s=0x89cdea8, vector_num=48,
> trigger_mode=0) at /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:434

[...]

It ends like this:

#131008 0x081ba353 in apic_update_irq (s=0x89cdea8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:405
#131009 0x081ba492 in apic_set_irq (s=0x89cdea8, vector_num=48,
trigger_mode=0) at /home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:434
#131010 0x081b9a77 in apic_local_deliver (s=0x89cdea8, vector=3) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:182
#131011 0x081b9acf in apic_deliver_pic_intr (d=0x89cdea8, level=1) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:191
#131012 0x081ba353 in apic_update_irq (s=0x89cdea8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:405
#131013 0x081bad5d in apic_get_interrupt (d=0x89cdea8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/apic.c:620
#131014 0x08271a77 in cpu_get_pic_interrupt (env=0x89c1ce8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/hw/pc.c:156
#131015 0x081e4cc6 in cpu_x86_exec (env=0x89c1ce8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/cpu-exec.c:320
#131016 0x081ea7d5 in tcg_cpu_exec (env=0x89c1ce8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/cpus.c:1007
#131017 0x081ea8e3 in tcg_exec_all () at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/cpus.c:1039
#131018 0x081e9f55 in qemu_tcg_cpu_thread_fn (arg=0x89c1ce8) at
/home/jcmvbkbc/ws/xtensa/qemu-xtensa/cpus.c:774
#131019 0xf7b37955 in start_thread (arg=0xf40a2b70) at pthread_create.c:300
#131020 0xf7ab7e7e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
(gdb)

-- 
Thanks.
-- Max