• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
    • Kestrel-books
    • X86isa
      • Program-execution
      • Tlb
      • Booting-linux
      • Introduction
      • X86isa-build-instructions
      • Publications
      • Contributors
      • Machine
        • X86isa-state
        • Syscalls
        • 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
          • Components-of-the-environment-field
          • Reading-memory-as-strings-or-bytes
            • Read-bytes-from-memory
            • Read-memory-zero-terminated
            • Read-string-zero-terminated
            • Read-string-from-memory
          • Converting-between-strings-and-bytes
          • Writing-strings-or-bytes-to-memory
        • Paging
      • Implemented-opcodes
      • Proof-utilities
      • To-do
      • Peripherals
      • Model-validation
      • Modelcalls
      • Concrete-simulation-examples
      • Utils
      • Debugging-code-proofs
    • Axe
    • Execloader
  • Math
  • Testing-utilities

• Reading-memory-as-strings-or-bytes

Read-string-zero-terminated

Read memory as a string till a zero is encountered

Signature

(read-string-zero-terminated ptr x86) → (mv * * x86)

Definitions and Theorems

Function: read-string-zero-terminated

(defun read-string-zero-terminated (ptr x86)
  (declare (xargs :stobjs (x86)))
  (declare (type (signed-byte 49) ptr))
  (declare (xargs :guard (and (integerp ptr)
                              (<= (- *2^47*) ptr)
                              (<= ptr *2^47*))))
  (let ((__function__ 'read-string-zero-terminated))
    (declare (ignorable __function__))
    (b* (((mv flg bytes x86)
          (read-memory-zero-terminated ptr x86 nil))
         ((when flg) (mv flg "nil" x86))
         (charlist (bytes-to-charlist bytes)))
      (mv nil (coerce charlist 'string)
          x86))))

Theorem: stringp-mv-nth-1-read-string-zero-terminated

(defthm stringp-mv-nth-1-read-string-zero-terminated
  (implies (force (x86p x86))
           (stringp (mv-nth 1
                            (read-string-zero-terminated ptr x86))))
  :rule-classes :type-prescription)

Theorem: x86p-mv-nth-2-read-string-zero-terminated

(defthm x86p-mv-nth-2-read-string-zero-terminated
  (implies (x86p x86)
           (x86p (mv-nth 2
                         (read-string-zero-terminated ptr x86)))))