Thank you David and Ian,
Based on your responses I finally figured out what I had to do. It works
now!
Best regards,
Ioannis
David Fernandez wrote:
On Wed, 2006-06-28 at 10:45 -0400, Ioannis E. Venetis wrote:
Hello Ian,
Thanks for answering this. I need to access the address of the label
within the assembly code that I write. This means that I will have to
check again the documentation of this architecture. I hope that I will
find something.
Best regards,
Ioannis
If you have a label in assembly code, and you want to use it in
assembly code, then you need to write whatever is appropriate for your
assembly language (e.g., "mov #MyLabel,r0"). That is not really a
compiler issue.
If you have a label in assembly code, and you want to use it in C code
(e.g., by doing "goto MyLabel;"), then, sorry, you can't do that.
Ian
To obtain the label address could be somthing like "mov #MyLabel, %<n>"
or "mov $MyLabel, %<n>" with <n> the output parameter number where you
get the result like : "=g" (MyLabelAddressVar).
To call a label from C code can be done using
goto *MyLabelAddressVar
I think that is a C Extension feature of gcc... You cold also pass the
value to another assembler block to do the trick, but that would be
architectural dependent some way...
"jmp *%0"
:
: "r" (MyLabelAddressVar)
David.
