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Undefined Thumb instruction disassembly
- From: Paul Brook <paul at codesourcery dot com>
- To: binutils at sourceware dot org
- Date: Tue, 27 Mar 2007 22:09:41 +0100
- Subject: Undefined Thumb instruction disassembly
Thumb instructions starting 0xde are architecturally undefined.
The patch below adds an opcode entry to disassemble them as such. Currently
they are disassembled as the (non-existant) bal.n instruction.
Applied to head.
Paul
2006-03-27 Paul Brook <paul@codesourcery.com>
opcodes/
* arm-dis.c (thumb_opcodes): Add entry for undefined insns (0xbe??).
Index: opcodes/arm-dis.c
===================================================================
RCS file: /var/cvsroot/src-cvs/src/opcodes/arm-dis.c,v
retrieving revision 1.79
diff -u -p -r1.79 arm-dis.c
--- opcodes/arm-dis.c 24 Mar 2007 02:51:28 -0000 1.79
+++ opcodes/arm-dis.c 27 Mar 2007 20:16:37 -0000
@@ -1145,6 +1145,7 @@ static const struct opcode16 thumb_opcod
/* format 17 */
{ARM_EXT_V4T, 0xDF00, 0xFF00, "svc%c\t%0-7d"},
/* format 16 */
+ {ARM_EXT_V4T, 0xDE00, 0xFE00, "undefined"},
{ARM_EXT_V4T, 0xD000, 0xF000, "b%8-11c.n\t%0-7B%X"},
/* format 18 */
{ARM_EXT_V4T, 0xE000, 0xF800, "b%c.n\t%0-10B%x"},