Re: [PATCH v12 07/21] x86/xen: Add stack frame dependency to hypercall inline asm calls

[David Vrabel]

On 09/09/15 14:21, Josh Poimboeuf wrote:
> If a hypercall is inlined at the beginning of a function, gcc can insert
> the call instruction before setting up a stack frame, which breaks frame
> pointer convention if CONFIG_FRAME_POINTER is enabled and can result in
> a bad stack trace.
> 
> Force a stack frame to be created if CONFIG_FRAME_POINTER is enabled by
> listing the stack pointer as an output operand for the hypercall inline
> asm statements.

Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx>

David
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/