Hello Joel,
this is not a GCC bug. There is no BSP that uses the -mthumb
-march=armv6-m yet, so this option is untested. You do you build the
RTEMS multilibs?
On 08/01/15 17:57, Joel Sherrill wrote:
Hi
I think this is actually an RTEMS conditional issue but filed it as
a GCC PR anyway for review.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64542
This was generated building arm-rtems multilib. The PR has a preprocessed
file and can easily reproduce the error.
Feedback appreciated. I suspect we have selected the wrong code based on
the compilation flags or have an invalid multilib combination.
arm-rtems4.11-gcc --pipe -mthumb -march=armv6-m --pipe -DHAVE_CONFIG_H
-I../../.. -I../../../../../../lib/include -g -O2 -Wall
-Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT
libscorecpu_a-cpu.o -MD -MP -MF .deps/libscorecpu_a-cpu.Tpo -c -o
libscorecpu_a-cpu.o `test -f 'cpu.c' || echo
'/users/joel/test-gcc/rtems/cpukit/score/cpu/arm/'`cpu.c
{standard input}: Assembler messages:
{standard input}:187: Error: selected processor does not support ARM opcodes
{standard input}:188: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `mrsr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>,cpsr'
{standard input}:189: Error: attempt to use an ARM instruction on a Thumb-only processor --
`bicr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>,#(1<<7)'
{standard input}:190: Error: attempt to use an ARM instruction on a Thumb-only processor -- `orrr3
<http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>,r0
<http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=0>'
{standard input}:191: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `msr cpsr,r3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>'
{standard input}:192: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `addr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>,pc,#1'
{standard input}:193: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `bxr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>'
{standard input}:218: Error: selected processor does not support ARM opcodes
{standard input}:219: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `mrsr0 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=0>,cpsr'
{standard input}:220: Error: attempt to use an ARM instruction on a Thumb-only processor --
`andr0 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=0>,#(1<<7)'
{standard input}:221: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `addr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>,pc,#1'
{standard input}:222: Error: attempt to use an ARM instruction on a Thumb-only processor
-- `bxr3 <http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=3>'
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherr...@oarcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985
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