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linker: Don't rely on out-of-range bv-ref exceptions.

* module/system/vm/linker.scm (find-shstrndx): Check whether NAME is
lower than the length of BV; remove 'false-if-exception' around
'string-table-ref' call.
This commit is contained in:
Ludovic Courtès 2018-06-28 17:14:08 +02:00
parent 8209f0f5c0
commit b87068eee7

View file

@ -1,6 +1,6 @@
;;; Guile ELF linker
;; Copyright (C) 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
;; Copyright (C) 2011, 2012, 2013, 2014, 2018 Free Software Foundation, Inc.
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@ -478,8 +478,8 @@ section index."
(bv (linker-object-bv object))
(name (elf-section-name section)))
(and (= (elf-section-type section) SHT_STRTAB)
(equal? (false-if-exception (string-table-ref bv name))
".shstrtab")
(< name (bytevector-length bv))
(string=? (string-table-ref bv name) ".shstrtab")
(elf-section-index section))))
objects))