GNU bug report logs - #40737
Segfault in arm gcc7, thumb2 builroot, with arm patch

Previous Next

Package: guile;

Reported by: dsmich <at> roadrunner.com

Date: Mon, 20 Apr 2020 19:35:02 UTC

Severity: important

Done: Dale Smith <dalepsmith <at> gmail.com>

Bug is archived. No further changes may be made.

Full log

View this message in rfc822 format

From: Andrew Gierth <andrew <at> tao11.riddles.org.uk>
To: 40737 <at> debbugs.gnu.org
Subject: bug#40737: Segfault in arm gcc7, thumb2 builroot, with arm patch
Date: Fri, 19 Jun 2020 17:07:34 +0100

[Message part 1 (text/plain, inline)]
Patch attached.

-- 
Andrew.


[guile-arm.patch (text/x-patch, inline)]
diff --git a/libguile/lightening/lightening/arm-cpu.c b/libguile/lightening/lightening/arm-cpu.c
index 4445266af..2b4eecc29 100644
--- a/libguile/lightening/lightening/arm-cpu.c
+++ b/libguile/lightening/lightening/arm-cpu.c
@@ -230,7 +230,7 @@ encode_thumb_immediate(unsigned int v)
     return ((v & 0xff) | (1 << 12));
   /* abcdefgh 00000000 abcdefgh 00000000 */
   if (((v & 0xffff0000) >> 16) == (v & 0xffff) && (v & 0xff) == 0)
-    return ((v & 0x000000ff) | (2 << 12));
+    return (((v & 0x0000ff00) >> 8) | (2 << 12));
   /* abcdefgh abcdefgh abcdefgh abcdefgh */
   if ( (v &    0xff)        == ((v &     0xff00) >>  8) &&
        ((v &   0xff00) >> 8) == ((v &   0xff0000) >> 16) &&
This bug report was last modified 4 years and 332 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.