[Qemu-devel] [Bug 1516408] Re: sh4: Unsupported syscall: 186

[John Paul Adrian Glaubitz]

I have enabled this syscall in the source code now and performing a test
build and run and will report back.

Furthermore, looking at the kernel sources, both the 32-bit and 64-bit
Linux SH-specific code defines "sigaltstack" as syscall 186:

> https://github.com/torvalds/linux/blob/master/arch/sh/kernel/syscalls_32.S#L205
> https://github.com/torvalds/linux/blob/master/arch/sh/kernel/syscalls_64.S#L209

The whole syscall also doesn't appear to be architecture-specific after
reading the manpage for sigaltstack. Is it?

Will report back after further testing.

Thanks,
Adrian

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1516408

Title:
  sh4: Unsupported syscall: 186

Status in QEMU:
  New

Bug description:
  Hello!

  I'm currently testing qemu as a possibility to set up a buildd for the
  Debian sh4 port.

  I set up qemu and an sh4 chroot as described in the Debian Wiki [1].
  This seems to be working mostly fine (besides the fact that qemu
  segfaults on an amd64 host while it runs fine on an i386 host, I'll
  file a separate bug report). However, when installing python3.4 in the
  sh4 chroot, qemu repeatedly printed an error message about an
  unimplemented syscall: 186:

  qemu: Unsupported syscall: 186

  From the source code in linux-user/sh4/syscall_nr.h it's apparent that
  186 is defined as

  #define TARGET_NR_sigaltstack   186

  Looking at the implementation part, it becomes obvious that this
  syscall is not enabled for sh4:

  #if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_MIPS) || \
      defined(TARGET_SPARC) || defined(TARGET_PPC) || defined(TARGET_ALPHA) || \
      defined(TARGET_M68K) || defined(TARGET_S390X) || defined(TARGET_OPENRISC)
          ret = do_sigaltstack(arg1, arg2, get_sp_from_cpustate((CPUArchState 
*)cpu_env));
          break;
  #else
          goto unimplemented;
  #endif

  Is there any particular reason why TARGET_NR_sigaltstack is not
  enabled on sh4? If not, could you enable it?

  Thanks,
  Adrian

  > [1] https://wiki.debian.org/QemuUserEmulation

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1516408/+subscriptions