GAS generates "illegal" opcodes instead of showing a warning or error if
wrong assembly code is entered in unified mode.
Worse: E.g. XScale excecutes the illegal opcodes.
Example: arm-none-eabi-as -mcpu=xscale
.syntax unified
.code 16
mov r1,r0
movs r1,r0
Result:
0000000 <.text>:
0: 4601 mov r1, r0
2: 1c01 adds r1, r0, #0
0: - Illegal opcode for XScale, move w/o setting flags.
Note:
According ARM ARM the opcode is valid, but the old syntax does not allow to
choose two lower registers.
IMHO, a warning should be issued if a none-T2 cpu is selected.
--
Summary: generates "illegal" opcodes in unified mode instead of
error
Product: binutils
Version: 2.19
Status: NEW
Severity: enhancement
Priority: P2
Component: gas
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: bastian dot schick at sciopta dot com
CC: bug-binutils at gnu dot org
GCC build triplet: i686-pc-cygwin
GCC host triplet: i686-pc-cygwin
GCC target triplet: arm-none-eabi
http://sourceware.org/bugzilla/show_bug.cgi?id=9856
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