Extra registers in SPARCv9 sendsig never used
While working on AVX userland support i noticed that
sendsig for SPARCv9 never sets xregs_size. Because
xregs_size is always 0 the extra registers are never added
to the stackframe.
xregs_size = xregs_getsize(p); should be inserted.
I have no hardware to confirm or test this.