Re: arm/thumb broken on head

[Richard Earnshaw <rearnsha at arm dot com>]

On 10/11/14 15:26, Joel Sherrill wrote:
> Hi
> 
> With gcc, newlib, and binutils head, arm-rtems and arm-eabi both
> die building libgcc2.c for the Thumb. I don't know if this is a recent
> gcc change or binutils having added some new error checking. Anyone
> got any ideas?
> 
> /users/joel/test-gcc/b-arm-eabi-gcc/./gcc/xgcc
> -B/users/joel/test-gcc/b-arm-eabi-gcc/./gcc/ -nostdinc
> -B/users/joel/test-gcc/b-arm-eabi-gcc/arm-eabi/newlib/ -isystem
> /users/joel/test-gcc/b-arm-eabi-gcc/arm-eabi/newlib/targ-include
> -isystem /users/joel/test-gcc/gcc/newlib/libc/include
> -B/users/joel/test-gcc/b-arm-eabi-gcc/arm-eabi/libgloss/arm
> -L/users/joel/test-gcc/b-arm-eabi-gcc/arm-eabi/libgloss/libnosys
> -L/users/joel/test-gcc/gcc/libgloss/arm
> -B/users/joel/test-gcc/install-head/arm-eabi/bin/
> -B/users/joel/test-gcc/install-head/arm-eabi/lib/ -isystem
> /users/joel/test-gcc/install-head/arm-eabi/include -isystem
> /users/joel/test-gcc/install-head/arm-eabi/sys-include    -g -O2 -mthumb
> -O2  -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -W -Wall
> -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
> -Wmissing-prototypes -Wold-style-definition  -isystem ./include  
> -fno-inline -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector
> -Dinhibit_libc  -fno-inline -I. -I. -I../../.././gcc
> -I../../../../gcc/libgcc -I../../../../gcc/libgcc/.
> -I../../../../gcc/libgcc/../gcc -I../../../../gcc/libgcc/../include 
> -DHAVE_CC_TLS  -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep
> -DL_muldi3 -c ../../../../gcc/libgcc/libgcc2.c -fvisibility=hidden
> -DHIDE_EXPORTS
> /tmp/cc9EfnXy.s: Assembler messages:
> /tmp/cc9EfnXy.s:69: Error: MOV Rd, Rs with two low registers is not
> permitted on this architecture -- `mov r6,r7'
> 

This is most likely fallout from the migration of thumb1 assembly to
unified syntax.  Terry, if this hasn't already been sorted can you take
a look?

R.