[Qemu-devel] [Bug 1076445] [NEW] qemu-i386 fails on system(3) with a cross-toolchain from Buildroot

[fperrad]

Public bug reported:

qemu-i386 fails with small C program containing a system().
The C program is cross-compiled with a toolchain created by buildroot 
(http://buildroot.net/), gcc version 4.6.3, uClibc version 0.9.33.2 .
qemu version 1.2.0 (built with 
http://git.buildroot.net/buildroot/tree/package/qemu/qemu.mk)
host machine : Ubuntu 12.04 LTS on x86_64.

    $ cat sys.c
    #include <stdio.h>
    #include <stdlib.h>

    int main()
   {
        int ret = system("echo hello");
        printf("%d\n", ret);
    }

    $ ../../host/usr/bin/i686-buildroot-linux-uclibc-gcc -o sys sys.c
    $ file sys
    sys: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically 
linked (uses shared libs), not stripped
    $ ../../host/usr/bin/qemu-i386 ./sys
    -1

same problem with x86_64 :
    $ ../../host/usr/bin/x86_64-buildroot-linux-uclibc-gcc -o sys sys.c
    $ file sys
    sys: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically 
linked (uses shared libs), not stripped
    $ ../../host/usr/bin/qemu-x86_64 sys
    -1

works fine with arm :
    $ ../../host/usr/bin/arm-buildroot-linux-uclibcgnueabi-gcc -o sys sys.c
    $ file sys
    sys: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked 
(uses shared libs), not stripped
    $ ../../host/usr/bin/qemu-arm ./sys
    hello
    0

works fine with mips :
    $ ../../host/usr/bin/mips-buildroot-linux-uclibc-gcc -o sys sys.c
    $ file sys
    sys: ELF 32-bit MSB executable, MIPS, MIPS32 rel2 version 1 (SYSV), 
dynamically linked (uses shared libs), with unknown capability 0x41000000 = 
0xf676e75, with unknown capability 0x10000 = 0x70403, not stripped
    $ ../../host/usr/bin/qemu-mips sys
    hello
    0

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1076445

Title:
  qemu-i386 fails on system(3) with a cross-toolchain from Buildroot

Status in QEMU:
  New

Bug description:
  qemu-i386 fails with small C program containing a system().
  The C program is cross-compiled with a toolchain created by buildroot 
(http://buildroot.net/), gcc version 4.6.3, uClibc version 0.9.33.2 .
  qemu version 1.2.0 (built with 
http://git.buildroot.net/buildroot/tree/package/qemu/qemu.mk)
  host machine : Ubuntu 12.04 LTS on x86_64.

      $ cat sys.c
      #include <stdio.h>
      #include <stdlib.h>

      int main()
     {
        int ret = system("echo hello");
        printf("%d\n", ret);
      }

      $ ../../host/usr/bin/i686-buildroot-linux-uclibc-gcc -o sys sys.c
      $ file sys
      sys: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), 
dynamically linked (uses shared libs), not stripped
      $ ../../host/usr/bin/qemu-i386 ./sys
      -1

  same problem with x86_64 :
      $ ../../host/usr/bin/x86_64-buildroot-linux-uclibc-gcc -o sys sys.c
      $ file sys
      sys: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically 
linked (uses shared libs), not stripped
      $ ../../host/usr/bin/qemu-x86_64 sys
      -1

  works fine with arm :
      $ ../../host/usr/bin/arm-buildroot-linux-uclibcgnueabi-gcc -o sys sys.c
      $ file sys
      sys: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked 
(uses shared libs), not stripped
      $ ../../host/usr/bin/qemu-arm ./sys
      hello
      0

  works fine with mips :
      $ ../../host/usr/bin/mips-buildroot-linux-uclibc-gcc -o sys sys.c
      $ file sys
      sys: ELF 32-bit MSB executable, MIPS, MIPS32 rel2 version 1 (SYSV), 
dynamically linked (uses shared libs), with unknown capability 0x41000000 = 
0xf676e75, with unknown capability 0x10000 = 0x70403, not stripped
      $ ../../host/usr/bin/qemu-mips sys
      hello
      0

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