[Bug 1914021] [NEW] qemu: uncaught target signal 4 (Illegal instruction) but gdb remote-debug exited normally

[Dong JianQiang]

Public bug reported:

I'm getting Illegal instruction (core dumped) when running the attached
a.out_err binary in qemu, but when using Gdb to remote-debug the
program, it exited normally. will appreciate if you can help look into
this qemu issue.

readelf -h a.out_err
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           ARM
  Version:                           0x1
  Entry point address:               0x8220
  Start of program headers:          52 (bytes into file)
  Start of section headers:          54228 (bytes into file)
  Flags:                             0x5000200, Version5 EABI, soft-float ABI
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         3
  Size of section headers:           40 (bytes)
  Number of section headers:         16
  Section header string table index: 15

qemu-arm version 4.0.0

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "a.out_err"
   https://bugs.launchpad.net/bugs/1914021/+attachment/5458737/+files/a.out_err

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1914021

Title:
  qemu: uncaught target signal 4 (Illegal instruction) but gdb remote-
  debug exited normally

Status in QEMU:
  New

Bug description:
  I'm getting Illegal instruction (core dumped) when running the
  attached a.out_err binary in qemu, but when using Gdb to remote-debug
  the program, it exited normally. will appreciate if you can help look
  into this qemu issue.

  readelf -h a.out_err
  ELF Header:
    Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
    Class:                             ELF32
    Data:                              2's complement, little endian
    Version:                           1 (current)
    OS/ABI:                            UNIX - System V
    ABI Version:                       0
    Type:                              EXEC (Executable file)
    Machine:                           ARM
    Version:                           0x1
    Entry point address:               0x8220
    Start of program headers:          52 (bytes into file)
    Start of section headers:          54228 (bytes into file)
    Flags:                             0x5000200, Version5 EABI, soft-float ABI
    Size of this header:               52 (bytes)
    Size of program headers:           32 (bytes)
    Number of program headers:         3
    Size of section headers:           40 (bytes)
    Number of section headers:         16
    Section header string table index: 15

  qemu-arm version 4.0.0

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1914021/+subscriptions