• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
    • Kestrel-books
    • X86isa
      • Program-execution
      • Sdm-instruction-set-summary
      • Tlb
      • Booting-linux
      • Introduction
      • Asmtest
      • X86isa-build-instructions
      • Publications
      • Contributors
      • Machine
        • X86isa-state
        • Syscalls
          • Syscalls-logic
            • Syscall-write-logic
            • Syscall-lseek-logic
            • Syscall-read-logic
            • Syscall-open-logic
            • Syscall-dup2-logic
            • Syscall-close-logic
            • Syscall-dup-logic
            • Syscall-write
            • Syscall-read
            • Syscall-open
            • Syscall-lseek
            • Syscall-close
            • Syscall-dup
            • Syscall-unlink
            • Syscall-truncate
            • Syscall-stat
            • Syscall-lstat
            • Syscall-link
            • Syscall-ftruncate
            • Syscall-fstat
            • Syscall-fcntl
            • Syscall-fadvise64
            • Syscall-dup2
            • Syscall-unlink-logic
            • Syscall-truncate-logic
            • Syscall-stat-logic
            • Syscall-lstat-logic
            • Syscall-link-logic
            • Syscall-ftruncate-logic
            • Syscall-fstat-logic
            • Syscall-fcntl-logic
            • Syscall-fadvise64-logic
            • Syscall-dup3-logic
            • Syscall-dup3
          • X86-syscall-args-and-return-value-marshalling
          • Syscall-numbers
          • Syscalls-exec
        • Cpuid
        • Linear-memory
        • Rflag-specifications
        • Characterizing-undefined-behavior
        • Top-level-memory
        • App-view
        • X86-decoder
        • Physical-memory
        • Decoding-and-spec-utils
        • Instructions
        • Register-readers-and-writers
        • X86-modes
        • Segmentation
        • Other-non-deterministic-computations
        • Environment
        • Paging
      • Implemented-opcodes
      • To-do
      • Proof-utilities
      • Peripherals
      • Model-validation
      • Modelcalls
      • Concrete-simulation-examples
      • Utils
      • Debugging-code-proofs
    • Axe
    • Execloader
  • Math
  • Testing-utilities

• Syscalls-logic

Syscall-dup-logic

Signature

(syscall-dup-logic oldfd x86) → (mv * x86)

From the dup(2) man page (Linux):

int dup(int oldfd);

dup() uses the lowest-numbered unused descriptor for the new descriptor.

Definitions and Theorems

Function: syscall-dup-logic

(defun syscall-dup-logic (oldfd x86)
 (declare (xargs :stobjs (x86)))
 (declare (ignorable oldfd x86))
 (declare (xargs :guard (integerp oldfd)))
 (let ((__function__ 'syscall-dup-logic))
  (declare (ignorable __function__))
  (b*
   ((obj-fd-field (read-x86-file-des oldfd x86))
    ((when (not (file-descriptor-fieldp obj-fd-field)))
     (b*
      ((-
        (cw
         "~%Error: File Descriptor Field ill-formed. Maybe these books were ~
not built with X86ISA_EXEC set to t? See :doc x86isa-build-instructions.~%~%"))
       (x86
        (!ms
         (list
          (rip x86)
          "File Descriptor Field ill-formed. Maybe these books were ~
not built with X86ISA_EXEC set to t? See :doc x86isa-build-instructions."
          (ms x86))
         x86)))
      (mv -1 x86)))
    ((mv newfd x86) (pop-x86-oracle x86))
    ((when (not (integerp newfd)))
     (b*
       ((- (cw "~%Error: New file descriptor not an integer.~%~%"))
        (x86 (!ms (list (rip x86)
                        "New file descriptor not an integer"
                        newfd (ms x86))
                  x86)))
       (mv -1 x86))))
   (mv newfd x86))))