a4e74e9ba6
The registers in ilumos and FreeBSD have a different number. In the illumos, last 32-bits register defined is SS an in FreeBSD is GS. This off-by-one caused the uregs array to returns the wrong 64-bits register on amd64. Reviewed by: markj MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D20363