On Fri, Jan 22, 2016 at 03:44:38PM -0600, Chris J Arges wrote:
> Stacktool generates the following warning:
> stacktool: arch/x86/kvm/vmx.o: vmx_handle_external_intr()+0x67: call without frame pointer save/setup
>
> By adding the stackpointer as an output operand, this patch ensures that a
> stack frame is created when CONFIG_FRAME_POINTER is enabled for the inline
> assmebly statement.
>
> Signed-off-by: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
Reviewed-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> ---
> arch/x86/kvm/vmx.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index e2951b6..e153522 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -8356,6 +8356,7 @@ static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
> static void vmx_handle_external_intr(struct kvm_vcpu *vcpu)
> {
> u32 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
> + register void *__sp asm(_ASM_SP);
>
> /*
> * If external interrupt exists, IF bit is set in rflags/eflags on the
> @@ -8388,8 +8389,9 @@ static void vmx_handle_external_intr(struct kvm_vcpu *vcpu)
> "call *%[entry]\n\t"
> :
> #ifdef CONFIG_X86_64
> - [sp]"=&r"(tmp)
> + [sp]"=&r"(tmp),
> #endif
> + "+r"(__sp)
> :
> [entry]"r"(entry),
> [ss]"i"(__KERNEL_DS),
> --
> 2.5.0
>
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