[Qemu-devel] [Bug 1344320] Re: qemu-aarch64 cannot execute glibc

[Peter Maydell]

Q: is this in a released glibc? The generic timers are strictly speaking
optional, so this seems kind of bogus. Also looking at the glibc sources
it never reads the counter frequency so what it is hoping to do with the
timer values I have no idea.

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https://bugs.launchpad.net/bugs/1344320

Title:
  qemu-aarch64 cannot execute glibc

Status in QEMU:
  New

Bug description:
  $ aarch64-linux-user/qemu-aarch64 -version
  qemu-aarch64 version 2.0.92, Copyright (c) 2003-2008 Fabrice Bellard
  $ aarch64-linux-user/qemu-aarch64 -d in_asm 
/daten/build/build-root/home/abuild/rpmbuild/BUILD/glibc-2.19.90/cc-base/elf/ld-linux-aarch64.so.1
 
  host mmap_min_addr=0x10000
  guest_base  0x0
  start            end              size             prot
  0000004000000000-000000400001e000 000000000001e000 r-x
  000000400001e000-000000400002e000 0000000000010000 ---
  000000400002e000-0000004000031000 0000000000003000 rw-
  0000004000031000-0000004000032000 0000000000001000 ---
  0000004000032000-0000004000832000 0000000000800000 rw-
  start_brk   0x0000000000000000
  end_code    0x000000400001dbe0
  start_code  0x0000004000000000
  start_data  0x000000400002eba8
  end_data    0x0000004000030008
  start_stack 0x0000004000830a10
  brk         0x0000004000030170
  entry       0x00000040000012c0
  ----------------
  IN: 
  0x00000040000012c0:  910003e0      mov x0, sp
  0x00000040000012c4:  94000d4f      bl #+0x353c (addr 0x7fffb5bdad68)

  ----------------
  IN: _dl_start
  0x0000004000004800:  d11243ff      sub sp, sp, #0x490 (1168)
  0x0000004000004804:  a9ba7bfd      stp x29, x30, [sp, #-96]!
  0x0000004000004808:  910003fd      mov x29, sp
  0x000000400000480c:  a9046bf9      stp x25, x26, [sp, #64]
  0x0000004000004810:  a90153f3      stp x19, x20, [sp, #16]
  0x0000004000004814:  a9025bf5      stp x21, x22, [sp, #32]
  0x0000004000004818:  a90363f7      stp x23, x24, [sp, #48]
  0x000000400000481c:  a90573fb      stp x27, x28, [sp, #80]
  0x0000004000004820:  aa0003fa      mov x26, x0
  0x0000004000004824:  d5033fdf      isb
  0x0000004000004828:  d53be040      mrs x0, (unknown)

  qemu: uncaught target signal 4 (Illegal instruction) - core dumped
  Illegal instruction
  $ objdump -d 
/daten/build/build-root/home/abuild/rpmbuild/BUILD/glibc-2.19.90/cc-base/elf/ld-linux-aarch64.so.1
 | grep ' 4828:'
      4828:       d53be040        mrs     x0, cntvct_el0

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