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• Elf-reader

Read-elf-header

Read the ELF header from the first 64 bytes

Signature

(read-elf-header file-header) → header

Arguments

file-header — Guard (byte-listp file-header).

Returns

header — Type (elf-header-p header).

Definitions and Theorems

Function: read-elf-header

(defun read-elf-header (file-header)
  (declare (xargs :guard (byte-listp file-header)))
  (let ((__function__ 'read-elf-header))
    (declare (ignorable __function__))
    (b* (((mv e_magic file-header)
          (split-bytes 4 file-header))
         ((mv e_class file-header)
          (merge-first-split-bytes 1 file-header))
         (w (if (equal e_class 1) 4 8))
         ((mv e_dataenc file-header)
          (merge-first-split-bytes 1 file-header))
         ((mv e_identver file-header)
          (merge-first-split-bytes 1 file-header))
         ((mv e_osabi file-header)
          (merge-first-split-bytes 1 file-header))
         ((mv e_abiver file-header)
          (merge-first-split-bytes 1 file-header))
         ((mv e_padding file-header)
          (split-bytes 7 file-header))
         ((mv e_type file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_machine file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_version file-header)
          (merge-first-split-bytes 4 file-header))
         ((mv e_entry file-header)
          (merge-first-split-bytes w file-header))
         ((mv e_phoff file-header)
          (merge-first-split-bytes w file-header))
         ((mv e_shoff file-header)
          (merge-first-split-bytes w file-header))
         ((mv e_flags file-header)
          (merge-first-split-bytes 4 file-header))
         ((mv e_ehsize file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_phentsize file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_phnum file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_shentsize file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_shnum file-header)
          (merge-first-split-bytes 2 file-header))
         ((mv e_shstrndx &)
          (merge-first-split-bytes 2 file-header)))
      (make-elf-header :magic e_magic
                       :class e_class
                       :dataenc e_dataenc
                       :identver e_identver
                       :osabi e_osabi
                       :abiver e_abiver
                       :padding e_padding
                       :type e_type
                       :machine e_machine
                       :version e_version
                       :entry e_entry
                       :phoff e_phoff
                       :shoff e_shoff
                       :flags e_flags
                       :ehsize e_ehsize
                       :phentsize e_phentsize
                       :phnum e_phnum
                       :shentsize e_shentsize
                       :shnum e_shnum
                       :shstrndx e_shstrndx))))

Theorem: elf-header-p-of-read-elf-header

(defthm elf-header-p-of-read-elf-header
  (b* ((header (read-elf-header file-header)))
    (elf-header-p header))
  :rule-classes :rewrite)