This is the mail archive of the crossgcc@sources.redhat.com mailing list for the crossgcc project.
See the CrossGCC FAQ for lots more information.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
>I've found a bug in the gcc build on >http://www.davehylands.com/avi/index.htm that I've been trying. This isn't >just an inconvenience thing, but a matter of incorrectly generated code when >the -fomit-frame-pointer flag is on. I normally have that flag on, since >gdb does not need the frame pointer for debugging, and without it the >compiler saves a few instructions and cycles, and has another free register >to use. But with it enabled, the compiler produces incorrect code (example >below) - it reads function parameters from the wrong place, and it uses >incorrect addresses for local variables. I notice (from >http://www.davehylands.com/avi/compile_instructions_for_gcc.htm ) that this >build has a patch called gcc-3.3.1-coldfire-frame.patch.txt (available from >Avi's site) - I don't know if this is a standard or commonly used patch, but >it seems to provide the "interrupt" attribute (which is essential for my >program - I am running bare-bones without an OS on one of our own cards, and >I much prefer the "interrupt" attribute to writing assembly wrappers). I >don't know if the patch is related to the problem or not. Check out the patches at: http://www.develer.com/uclinux/uclinux-elf-tools.html One of which is gcc-3.3.1-coldfire-reload.patch which contains a small patch to gcc/reload1.c which isn't acceptable to the GCC maintainers since it makes an assumption about how instructions like: move.l 4(%sp),-(%sp) update %sp, before or after the access to 4(%sp). This patch has been found to fix problems using -fomit-frame-pointer on ColdFire. You'd best pick up the *complete* gcc-3.3.1 patch set... Good Luck! -- Peter Barada Peter.Barada@motorola.com Wizard 781-852-2768 (direct) WaveMark Solutions(A Motorola Company) 781-270-0193 (fax) ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |