Re: [Qemu-devel] [BUG] mips: tcg fatal error

[Aurelien Jarno <aurelien@aurel32.net>]

Stefan Weil a écrit :
> Hello,
> 
> MIPS Malta guest always raises a tcg fatal error
> during aptitude safe-upgrade. Maybe this is a regression,
> because it used to work some weeks ago.

If I correctly analysed the problem, it should be fixed in
revision 7132.

> If this is necessary, I can try to find the bad
> commit.
> 
> guest: MIPS Malta (big endian) Debian lenny
> host: x86-64 Debian lenny
> 
> See more details below.
> 
> Regards
> Stefan
> 
> 
> $ mips-softmmu/qemu-system-mips \
>     --kernel 2.6.26.3/be/vmlinux \
>     --append 'debug nohz=off root=/dev/nfs rw ip=::::malta::dhcp' \
>     -M malta --cpu 4KEc --net nic,model=pcnet --net user -m 256
> 
> /home/stefan/src/qemu/trunk/tcg/tcg.c:1767: tcg fatal error
> 
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0x7f411d0896e0 (LWP 19501)]
> 0x00007f411b8b6ed5 in raise () from /lib/libc.so.6
> (gdb) i s
> #0  0x00007f411b8b6ed5 in raise () from /lib/libc.so.6
> #1  0x00007f411b8b83f3 in abort () from /lib/libc.so.6
> #2  0x0000000000528212 in tcg_reg_alloc_call (s=0xc9ae60, def=0x810200,
> opc=8, args=0xca3bf8, dead_iargs=3) at
> /home/stefan/src/qemu/trunk/tcg/x86_64/tcg-target.c:1176
> #3  0x000000000053134e in tcg_gen_code (s=0xc9ae60,
> gen_code_buf=0x42f1af00 "A\213ntH\213?\203? A?\001") at
> /home/stefan/src/qemu/trunk/tcg/tcg.c:1973
> #4  0x00000000004ceab8 in cpu_mips_gen_code (env=0x2b8ed50,
> tb=0x7f41175046e0, gen_code_size_ptr=0x7fff250b5d74) at
> /home/stefan/src/qemu/trunk/translate-all.c:122
> #5  0x00000000004cd5ad in tb_gen_code (env=0x2b8ed50, pc=2142442064,
> cs_base=0, flags=<value optimized out>, cflags=0) at
> /home/stefan/src/qemu/trunk/exec.c:890
> #6  0x00000000004cf0cc in cpu_mips_exec (env1=<value optimized out>) at
> /home/stefan/src/qemu/trunk/cpu-exec.c:160
> #7  0x000000000040a82c in main (argc=15, argv=0x7fff250b63e8,
> envp=<value optimized out>) at /home/stefan/src/qemu/trunk/vl.c:3839
> (gdb) p *ts
> $1 = {base_type = 0, type = 0, val_type = 0, reg = 5, val = 19, mem_reg
> = 14, mem_offset = 68056, fixed_reg = 0, mem_coherent = 0, mem_allocated
> = 0, temp_local = 0,
>   temp_allocated = 0, next_free_temp = 54, name = 0x0}
> 
> 
> $ tail -30 /tmp/qemu.log
> do_interrupt enter: PC 2aaf7f30 EPC 2aaf7f1c coprocessor unusable exception
> do_interrupt: PC 80000180 EPC 2aaf7f30 cause 11
>     S 0000a413 C 1080002c A 00499738 D 00000000
> helper_raise_exception_err: 19 1
> do_interrupt enter: PC 2aaf7fec EPC 2aaf7fdc coprocessor unusable exception
> do_interrupt: PC 80000180 EPC 2aaf7fec cause 11
>     S 0000a413 C 1080002c A 00499738 D 00000000
> helper_raise_exception_err: 19 1
> do_interrupt enter: PC 2aaf7f30 EPC 2aaf8008 coprocessor unusable exception
> do_interrupt: PC 80000180 EPC 2aaf7f30 cause 11
>     S 0000a413 C 1080002c A 00499738 D 00000000
> IN:
> 0x7f894610:  addiu      s1,sp,32
> 0x7f894614:  lw zero,1(zero)
> 0x7f894618:  tne        zero,zero,0x2f4
> 0x7f89461c:  slti       t7,s5,-32736
> 0x7f894620:  slti       s0,t8,22824
> 0x7f894624:  tge        t5,t2,0x27f
> 0x7f894628:  0x408715b2
> 0x7f89462c:  sltiu      t6,t0,22020
> 0x7f894630:  0x6b
> 0x7f894634:  slti       a1,t9,-20860
> 0x7f894638:  slti       sp,s5,29120
> 0x7f89463c:  0x48
> 0x7f894640:  sltiu      s0,s5,7400
> 0x7f894644:  0x6b4d47
> 0x7f894648:  bnel       v0,s0,0x7f8a5bb4
> 0x7f89464c:  0x59b01ce8
> 0x7f894650:  ori        s3,t9,0x396b
> 
> 
> 
> 


-- 
Aurelien Jarno	                        GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net