[ECOS] Problem with THUMB mode with AT91

[Claudio Leonel <cls at xpnet dot com dot br>]

Hi all,

I tried to generate a version of eCos for the AT91 EB55 platform
with THUMB MODE. I set the options in eCos configuration:
- Enable Thumb instruction set
- Enable Thumb interworking compiler option
I also included the '-mthumb' option in the Global Compiler Flags,
because setting the previous options was not enough (bug?).

I got an error in the assembly of the vectors.S file (see below),
but the problem seems to be in the 'hal_platform_setup.h' file in the
macros:"_led_init" and "_led"
It seems that it has instructions that are not THUMB compatible.
I am not familiar with ARM Assembly Language, does anyone know
how to fix this ?


===================================================================================
arm-elf-gcc -Wp,-MD,vectors.tmp 
-I/home/LinServ/paks/srcpu1//ecos_ram/ecos_ram_install/include 
-I/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current 
-I/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src 
-I/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/tests 
-I. -mcpu=arm7tdmi -mthumb -mno-short-load-words -Wall -Wpointer-arith 
-Wstrict-prototypes -Winline -Wundef -Woverloaded-virtual -g -O2 
-ffunction-sections -fdata-sections -fno-rtti -fno-exceptions 
-fvtable-gc -finit-priority -c -o 
/home/LinServ/paks/srcpu1//ecos_ram/ecos_ram_install/lib/vectors.o 
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S: 
Assembler messages:
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:427: 
Error: invalid immediate -- `mov r1,#0x0000FF00'
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:427: 
Error: invalid immediate -- `mov r1,#(3<<8)'
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:457: 
Error: invalid immediate -- `mov r1,#0x0000FF00'
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:457: 
Error: invalid immediate -- `mov r1,#(2<<8)'
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:462: 
Error: invalid immediate -- `mov r1,#0x0000FF00'
/home/LinServ/paks/ecos/cvs/ecos/packages/hal/arm/arch/current/src/vectors.S:462: 
Error: invalid immediate -- `mov r1,#(1<<8)'
===================================================================================

Regards,
Claudio L. Salvadori
Elaxys Tecnologia



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