nios2 "Error: r31 cannot be used with jmp; use ret instead"

[Joel Sherrill]

Thanks. If this fixes your problem, that's a good sign. :)

Can you file a ticket since changes to 4.11 require one?

Also please submit the patch as generated by git format-patch.
That really helps.

--joel

On Fri, Jan 27, 2017 at 5:11 PM, Hill, Jeff <johill at lanl.gov> wrote:

>
> Hello all,
>
> We are encountering some assembler errors, see below, when building RTEMS
> 4.11 for architecture nios2 with the default source builder generated tools.
>
> nios2-rtems4.11-gcc --pipe -DHAVE_CONFIG_H   -I.. -I../../cpukit/../../../
> altera-sys-config-s43x-BPPM/lib/include -I/home/hill/nios2-rtems/
> rtems/rtems-git/c/src/../../cpukit/libmisc/shell   -O3 -g -Wall
> -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes
> -Wnested-externs -MT shell/libshell_a-hexdump-parse.o -MD -MP -MF
> shell/.deps/libshell_a-hexdump-parse.Tpo -c -o shell/libshell_a-hexdump-parse.o
> `test -f 'shell/hexdump-parse.c' || echo '/home/hill/nios2-rtems/rtems/
> rtems-git/c/src/../../cpukit/libmisc/'`shell/hexdump-parse.c
> {standard input}: Assembler messages:
> {standard input}:881: Error: r31 cannot be used with jmp; use ret instead
> make[5]: *** [shell/libshell_a-hexdump-parse.o] Error 1
>
> Some additions, see below, to the RTEMS 4.11 source builder configuration
> file,  rtems-nios2.bset, appear to temporarily resolve this issue
> backporting a patch from the gcc mainline. I don't claim to have completed
> exhaustive testing at this point nor fully understand gcc internals, FWIW.
>
> #
> # Add fix for improper use of register 31 with jump instruction issue,
> # resulting in some assembler errors as follows
> #
> # "Error: r31 cannot be used with jmp; use ret instead"
> #
> %patch add gcc -p0 pw://patchwork.ozlabs.org/patch/471401/raw/nios2-add-
> IJMP_REGS-reg-class-for-indirect-jumps.patch
> %hash md5 nios2-add-IJMP_REGS-reg-class-for-indirect-jumps.patch
> 90d1052167fe25f561a8f9ab06a74499
>
> Jeff Hill
>
> #
> # Tools Set for RTEMS NIOS 4.11 Stable
> #
>
> %define release 1
>
> %define rtems_arch nios2
>
> #
> # The RTEMS 4.11 base defines.
> #
> %include rtems-4.11-base.bset
>
> #
> # Add fix for improper use of register 31 with jump instruction issue,
> # resulting in some assembler errors as follows
> #
> # "Error: r31 cannot be used with jmp; use ret instead"
> #
> %patch add gcc -p0 pw://patchwork.ozlabs.org/patch/471401/raw/nios2-add-
> IJMP_REGS-reg-class-for-indirect-jumps.patch
> %hash md5 nios2-add-IJMP_REGS-reg-class-for-indirect-jumps.patch
> 90d1052167fe25f561a8f9ab06a74499
>
> #
> # Tools configuration.
> #
> 4.11/rtems-autotools
> devel/expat-2.1.0-1
> tools/rtems-binutils-2.26-1
> tools/rtems-gcc-4.9.3-newlib-2.2.0-20150423-1
> tools/rtems-gdb-7.9-1
> tools/rtems-tools-4.11-1
> tools/rtems-kernel-4.11
> _______________________________________________
> users mailing list
> users at rtems.org
> http://lists.rtems.org/mailman/listinfo/users
>
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