Re: [Qemu-devel] QEMU+Aarch64: in_asm log skips instructions of loop-programs

[Sergey Smolov <smolov@ispras.ru>]

02.09.2015 16:55, Sergey Smolov пишет:
> Hello, List!
>
> I've found that while running Aarch64 assembler programs on QEMU with 
> "-d in_asm" option enabled I receive not complete logs. For example, 
> on the following assembler program which contains a loop :
>
> [assembler]
> .globl _start
> bl _start
> _start:
> label1:
>   movz  x0, 10
>   subs x0, x0, 1
>   b.eq label2
>   b label1
> label2:
> hlt #57005
> [/assembler]
>
> I receive the following log which does not include "loop unrolling":
> [log]
> ----------------
> IN:
> 0x0000000000000000:  94000001      bl #+0x4 (addr 0x4)
>
> ----------------
> IN:
> 0x0000000000000004:  d2800140      mov x0, #0xa
>
> ----------------
> IN:
> 0x0000000000000008:  f1000400      subs x0, x0, #0x1 (1)
>
> ----------------
> IN:
> 0x000000000000000c:  54000040      b.eq #+0x8 (addr 0x14)
>
> ----------------
> IN:
> 0x0000000000000010:  17fffffd      b #-0xc (addr 0x4)
>
>
> [/log]
>
> It seems that QEMU skips some internal instructions when generates 
> "in_asm" log. How to eliminate this?
>
> Thanks in advance!
>
> Sincerely yours,
> Sergey Smolov

Sorry, the correct assembler code is:

.globl _start
bl _start
_start:
movz  x0, 10
label1:
   subs x0, x0, 1
   b.eq label2
   b label1
label2:
hlt #57005