[Qemu-devel] [Bug 1636126] [NEW] qemu-system-arm segfaults on "smulbb r7, r5, r5"

[Roman]

Public bug reported:

I'll attach a binary that runs fine with qemu-system-arm V2.2.0 but V2.7.0 
segfaults.
By stepping through with gdb I found that the segfaults happens when executing 
the line "smulbb r7, r5, r5" (where r7=0x1, r5=0x12).
I'll also attach a debugger screenshot.

call and output:

/opt/qemu-system-arm -M integratorcp -cpu cortex-m3 -semihosting
-nographic -monitor null -serial null -no-reboot -kernel
0MFW_SafetyFunctions_ParameteruP1_CUNIT.elf

------------ CUnit_MFW_SafetyFunctions_Parameter ------------


     CUnit - A Unit testing framework for C - Version 2.1-0
     http://cunit.sourceforge.net/


Suite: Suite_MFW_SafetyFunctions_Parameter
  Test: MFW_SafetyFunctions_Parameter_PositionLimiter ... Segmentation fault 
(core dumped)

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: qemu segfault

** Attachment added: "elf-file for reproduction"
   
https://bugs.launchpad.net/bugs/1636126/+attachment/4766311/+files/0MFW_SafetyFunctions_ParameteruP1_CUNIT.elf

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https://bugs.launchpad.net/bugs/1636126

Title:
  qemu-system-arm segfaults on "smulbb r7, r5, r5"

Status in QEMU:
  New

Bug description:
  I'll attach a binary that runs fine with qemu-system-arm V2.2.0 but V2.7.0 
segfaults.
  By stepping through with gdb I found that the segfaults happens when 
executing the line "smulbb r7, r5, r5" (where r7=0x1, r5=0x12).
  I'll also attach a debugger screenshot.

  call and output:

  /opt/qemu-system-arm -M integratorcp -cpu cortex-m3 -semihosting
  -nographic -monitor null -serial null -no-reboot -kernel
  0MFW_SafetyFunctions_ParameteruP1_CUNIT.elf

  ------------ CUnit_MFW_SafetyFunctions_Parameter ------------

  
       CUnit - A Unit testing framework for C - Version 2.1-0
       http://cunit.sourceforge.net/

  
  Suite: Suite_MFW_SafetyFunctions_Parameter
    Test: MFW_SafetyFunctions_Parameter_PositionLimiter ... Segmentation fault 
(core dumped)

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