Jim,
If I define USER_LABEL_PREFIX "" and declare a global variable
using names r0/r1...r15 ( my register names ) , my assembler is
generating an error message saying " r0 is already defined , cannot use
register in expression " ........
How can i make sure my tool chain knows the difference between
global variable r0 and register r0.
Regards,
Sumanth G
Jim Wilson wrote:
On 07/30/2009 07:38 AM, sumanth wrote:
How can I make sure the debugging information printed by my compiler for
extern variables is correct.
I am able to print them in gdb in with an _ (underscore). I am using
Gcc-4.3.4 and gdb 5.3
ELF targets usually don't prepend an underscore to symbol names. But
if you are prepending an underscore for some reason, then you need to
make sure that your ASM_OUTPUT_* macros handle this correctly. You
set USER_LABEL_PREFIX to an underscore, and then you add the
USER_LABEL_PREFIX unless the symbol name starts with '*'. See the
ASM_GENERATE_INTERNAL_LABEL docs. This stuff can be tricky. You will
probably have to step through your cc1 port in gdb to see exactly what
is going on. It will be useful to look at an existing port that
handles this correctly; step through it in gdb to see how it works.
Jim
