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To: Cyril Bur <cyrilbur@gmail.com>, mikey@neuling.org, anton@samba.org,
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From: Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [3/8] selftests/powerpc: Test FPU and VMX regs in signal ucontext
Message-Id: <20151119113646.695F8141498@ozlabs.org>
Date: Thu, 19 Nov 2015 22:36:46 +1100 (AEDT)
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On Wed, 2015-18-11 at 03:26:50 UTC, Cyril Bur wrote:
> Load up the non volatile FPU and VMX regs and ensure that they are the
> expected value in a signal handler

This is giving me:

  $ /usr/bin/powerpc-linux-gnu-gcc -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"v4.0-rc1-55000-g906d582"' -I/home/buildbot/buildbot/slave/selftests-ppc64-gcc-ubuntu-be/build/tools/testing/selftests/powerpc  -O2 -g -pthread    fpu_signal.c ../harness.c fpu_asm.S   -o fpu_signal
  fpu_signal.c: In function ‘signal_fpu_sig’:
  fpu_signal.c:33:19: error: initialization from incompatible pointer type [-Werror]
    mcontext_t *mc = &uc->uc_mcontext;
                     ^
  fpu_signal.c:37:9: error: ‘mcontext_t’ has no member named ‘fp_regs’
     if (mc->fp_regs[i] != darray[i - 14]) {
           ^


As well as:

  $ /usr/bin/powerpc-linux-gnu-gcc -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"v4.0-rc1-55000-g906d582"' -I/home/buildbot/buildbot/slave/selftests-ppc64-gcc-ubuntu-be/build/tools/testing/selftests/powerpc  -O2 -g -pthread    vmx_syscall.c ../harness.c vmx_asm.S   -o vmx_syscall
  vmx_asm.S: Assembler messages:
  vmx_asm.S:61: Error: unsupported relocation against v20
  vmx_asm.S:63: Error: unsupported relocation against v21

Times infinity.

And same for vmx_preempt.

And:

  $ /usr/bin/powerpc-linux-gnu-gcc -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"v4.0-rc1-55000-g906d582"' -I/home/buildbot/buildbot/slave/selftests-ppc64-gcc-ubuntu-be/build/tools/testing/selftests/powerpc  -O2 -g -pthread    vmx_signal.c ../harness.c vmx_asm.S   -o vmx_signal
  make[1]: *** [vmx_preempt] Error 1
  vmx_signal.c: In function ‘signal_vmx_sig’:
  vmx_signal.c:37:19: error: initialization from incompatible pointer type [-Werror]
    mcontext_t *mc = &uc->uc_mcontext;
                     ^
  vmx_signal.c:41:16: error: ‘mcontext_t’ has no member named ‘v_regs’
     if (memcmp(mc->v_regs->vrregs[i], &varray[i - 20], 16)) {
                ^


cheers