Function reg_get_value_ex 

pub unsafe extern "C" fn reg_get_value_ex(
    reg: reg_id_t,
    mc: *mut dr_mcontext_t,
    val: *mut byte,
) -> bool_

Returns the value of the register \p reg as stored in \p mc, or for an mmx register as stored in the physical register. Up to sizeof(dr_zmm_t) bytes will be written to \p val.

This routine also supports reading AVX-512 mask registers. In this case, sizeof(dr_opmask_t) bytes will be written to \p val.

This routine does not support floating-point registers.

\note \p mc->flags must include the appropriate flag for the requested register.