[arm-gnu] Hard fault caused by blx instruction using printf on Cortex-M3 with CodeSourcery 2008q3-66

[Peter Laurich <Peter.Laurich@xxxxxxxxxxx>]

Hi,

I am using the CodeSourcery G++ Lite toolchain
arm-2008q3-66-arm-none-eabi to
generate code to run on the ST Micro STM3210E-EVAL board. My tool chain
is 
running on Linux but a colleague is having the same problem running on
Windows.

The problem is that the execution of the following C code results in a
hard fault:
  int i = 10;
  printf("i = %10d\r\n", i);

In working through the problem, it appears that the cause of the hard
fault
is the illegal instruction (on the Cortex-M3):

0x00002f82 <_vfprintf_r+3090>: blx   0x7834 <__aeabi_uldivmod>

The call to the gcclib aeabi_uldivmod from the libc vfprintf includes
uses blx
with an even address and this causes the hard fault.

My simplified gcc compile invocation is:
  Building file: ../Examples/USART/Printf/main.c
  Invoking: GCC C Compiler
  arm-none-eabi-gcc -O0 -g -ggdb -Wall -Werror -c -fmessage-length=0
-mthumb
 -march=armv7-m -mfix-cortex-m3-ldrd


My simplified linker invokation is:
  Building target: STM32_StdPeriph.axf
  Invoking: GCC C Linker
  arm-none-eabi-ld -nostartfiles -nodefaultlibs -nostdlib -static 

-L/home/peterL/platforms/ARM/arm-none-eabi/tools/arm-none-eabi/lib/thumb

-L/home/peterL/platforms/ARM/arm-none-eabi/tools/lib/gcc/arm-none-eabi/4.3.2/thumb
  -Tstm32_512_64_internal.ld --gc-sections -Map=STM32_StdPeriph.map
  -o"STM32_StdPeriph.axf"
  -lc -lgcc

I have also tried the compiler with -mcpu=cortex-m3 and -march=armv7
rather than
-march=armv7-m with the same results.

I have also tried forcing the linker to use the thumb2 libraries but
that too 
fails only with the mode of failure is different (bus fault in malloc
rather 
than a hard fault); I'm only addressing the hard fault in this posting.

I have searched extensively (hours and hours) in an attempt to find a
solution
but there is nothing out there that resolves my problem. Can anyone shed
some
light on this problem?

Thank you

Peter