On Mon, Mar 02, 2026 at 05:45:31PM +0100, Ard Biesheuvel wrote: > hv_crash_c_entry() is a C function that is entered without a stack, > and this is only allowed for functions that have the __naked attribute, > which informs the compiler that it must not emit the usual prologue and > epilogue or emit any other kind of instrumentation that relies on a > stack frame. > > So split up the function, and set the __naked attribute on the initial > part that sets up the stack, GDT, IDT and other pieces that are needed > for ordinary C execution. Given that function calls are not permitted > either, use the existing long return coded in an asm() block to call the > second part of the function, which is an ordinary function that is > permitted to call other functions as usual. > > Reviewed-by: Andrew Cooper <[email protected]> # asm parts, not hv > parts > Reviewed-by: Mukesh Rathor <[email protected]> > Acked-by: Uros Bizjak <[email protected]> > Cc: Wei Liu <[email protected]> > Cc: [email protected] > Fixes: 94212d34618c ("x86/hyperv: Implement hypervisor RAM collection into > vmcore") > Signed-off-by: Ard Biesheuvel <[email protected]>
Applied to hyperv-fixes. Thanks Ard!
