Hello, I am trying to create an .elf file from ARM assembly code needed for ARMulator. But whenever I try to compile the code with arm-elf-gcc, I get a 'bad instruction' error for every sing line, but compiling the code under keil makes no problem. The code:
AREA test, CODE, READWRITE SWI_Exit EQU &11 ENTRY ADR r0, A MOV r1, #15 STR r1, [r0] SWI SWI_Exit A = 0 END
Neither arm-elf-gcc -o arm.elf arm.s nor arm-elf-gcc -mthumb -Bstatic arm.s -o arm.elf as suggested on the ARMulator's site are working. I am already so desperate, as I can't find any proper tutorial or any more information on that. So I would very much appreciate ur guys help, as I also need that for my uni coursework. Cheers, Jimmy
arm-elf-gcc (to be more specific the GNU Assembler) has another syntax than Keil Assembler. You would need to rewrite this KEIL assembler source code. Starting points are of course the Keil User Manual and the GNU Assembler Manual (gas). Keil: http://www.keil.com/support/man/docs/armasm/armasm_CEGFDGED.htm http://www.keil.com/support/man/docs/armasm/armasm_Chdehaic.htm gas: http://sourceware.org/binutils/docs/as/ The line > AREA test, CODE, READWRITE will translate in something like .section test, "awx" or .section .test, "awx" If you look in such kind of code, you will find examples in the net e.g. http://www.zap.org.au/elec2041-cdrom/unsw/elec2041/experiment5.pdf that you can use as starter. Hint: In order to have a section test, you need the proper linker control script with the memory layout as well! IMHO it's much easier to look for an assembler tutorial with usage of the GNU toolchain than struggling with two unkowns - Keil/GNU translation and ARM learning.