syscalls: add _SYSCALL_VERIFY_MSG()

Expecting stringified expressions to be completely comprehensible to end
users is wishful thinking; we really need to express what a failed
system call verification step means in human terms in most cases.

Memory buffer and kernel object checks now are implemented in terms of
_SYSCALL_VERIFY_MSG.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
1 file changed