svn commit: r296391 - head/contrib/elftoolchain/elfcopy
Ed Maste
emaste at FreeBSD.org
Fri Mar 4 18:28:21 UTC 2016
Author: emaste
Date: Fri Mar 4 18:28:19 2016
New Revision: 296391
URL: https://svnweb.freebsd.org/changeset/base/296391
Log:
elfcopy: fail if debug link target is empty
An empty debug link target previously returned a confusing and incorrect
error like "objcopy: fread failed: No error: 0". Now, return an explicit
error.
GNU objcopy allows an empty file as the debug link target. However,
that case is nonsensical so diverging from GNU behaviour is fine.
Reviewed by: bdrewery
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D5541
Modified:
head/contrib/elftoolchain/elfcopy/sections.c
Modified: head/contrib/elftoolchain/elfcopy/sections.c
==============================================================================
--- head/contrib/elftoolchain/elfcopy/sections.c Fri Mar 4 18:17:53 2016 (r296390)
+++ head/contrib/elftoolchain/elfcopy/sections.c Fri Mar 4 18:28:19 2016 (r296391)
@@ -1522,6 +1522,9 @@ add_gnu_debuglink(struct elfcopy *ecp)
err(EXIT_FAILURE, "strdup failed");
if (stat(ecp->debuglink, &sb) == -1)
err(EXIT_FAILURE, "stat failed");
+ if (sb.st_size == 0)
+ errx(EXIT_FAILURE, "empty debug link target %s",
+ ecp->debuglink);
if ((buf = malloc(sb.st_size)) == NULL)
err(EXIT_FAILURE, "malloc failed");
if ((fp = fopen(ecp->debuglink, "r")) == NULL)
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