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Elf-header

Elf-header-p

Recognizer for elf-header structures.

Signature
(elf-header-p x) → *

Definitions and Theorems

Function: elf-header-p

(defun elf-header-p (x)
 (declare (xargs :guard t))
 (let ((__function__ 'elf-header-p))
  (declare (ignorable __function__))
  (and
   (mbe :logic
        (and (alistp x)
             (equal (strip-cars x)
                    '(magic class dataenc identver osabi
                            abiver padding type machine version
                            entry phoff shoff flags ehsize phentsize
                            phnum shentsize shnum shstrndx)))
        :exec (fty::alist-with-carsp
                   x
                   '(magic class dataenc identver osabi
                           abiver padding type machine version
                           entry phoff shoff flags ehsize phentsize
                           phnum shentsize shnum shstrndx)))
   (b* ((magic (cdr (std::da-nth 0 x)))
        (class (cdr (std::da-nth 1 x)))
        (dataenc (cdr (std::da-nth 2 x)))
        (identver (cdr (std::da-nth 3 x)))
        (osabi (cdr (std::da-nth 4 x)))
        (abiver (cdr (std::da-nth 5 x)))
        (padding (cdr (std::da-nth 6 x)))
        (type (cdr (std::da-nth 7 x)))
        (machine (cdr (std::da-nth 8 x)))
        (version (cdr (std::da-nth 9 x)))
        (entry (cdr (std::da-nth 10 x)))
        (phoff (cdr (std::da-nth 11 x)))
        (shoff (cdr (std::da-nth 12 x)))
        (flags (cdr (std::da-nth 13 x)))
        (ehsize (cdr (std::da-nth 14 x)))
        (phentsize (cdr (std::da-nth 15 x)))
        (phnum (cdr (std::da-nth 16 x)))
        (shentsize (cdr (std::da-nth 17 x)))
        (shnum (cdr (std::da-nth 18 x)))
        (shstrndx (cdr (std::da-nth 19 x))))
     (and (byte-listp magic)
          (natp class)
          (natp dataenc)
          (natp identver)
          (natp osabi)
          (natp abiver)
          (byte-listp padding)
          (natp type)
          (natp machine)
          (natp version)
          (natp entry)
          (natp phoff)
          (natp shoff)
          (natp flags)
          (natp ehsize)
          (natp phentsize)
          (natp phnum)
          (natp shentsize)
          (natp shnum)
          (natp shstrndx))))))

Theorem: consp-when-elf-header-p

(defthm consp-when-elf-header-p
  (implies (elf-header-p x) (consp x))
  :rule-classes :compound-recognizer)