		Search-engine friendly clone of the ACL2 documentation.

X86-syscall-args-and-return-value-marshalling

X86-syscall-dup

Signature
(x86-syscall-dup x86) → x86
Returns: x86 — Type (x86p x86), given the guard.

Definitions and Theorems

Function: x86-syscall-dup

(defun x86-syscall-dup (x86)
  (declare (xargs :stobjs (x86)))
  (declare (xargs :guard t))
  (let ((__function__ 'x86-syscall-dup))
    (declare (ignorable __function__))
    (b* ((ctx 'x86-syscall-dup)
         (oldfd (rgfi *rdi* x86))
         ((mv ret x86) (syscall-dup oldfd x86))
         ((when (or (ms x86) (not (i64p ret))))
          (!ms (list ctx
                     :oracle-val-for-syscall-dup ret)
               x86))
         (x86 (!rgfi *rax* ret x86)))
      x86)))

Theorem: x86p-of-x86-syscall-dup

(defthm x86p-of-x86-syscall-dup
  (implies (and (x86p x86))
           (b* ((x86 (x86-syscall-dup x86)))
             (x86p x86)))
  :rule-classes :rewrite)