Memory allocation failure

Guest wrote:

> I have a c code which contains memory allocation functions calloc.I have
> ported the code to ARM7 using Winarm.I have provided the system call
> wrappers while porting.

Please show your sbrk-implementation. It is difficult to comment without
seeing the implemenation.

> But while running the code in arm board memory
> allocation fails.i Have 64 mb ram on board.Does the code need any
> initialization??

Which target? There might be an some kind of memory-bus initialisation
needed or some kind of remapping. Please show the startup-code.

- Is the the heap-start-address set correctly in the linker-script?
(something like "provide (end = _HEAP_START_)" or "provide (end = .)")
if the label "end" is used for the sbrk-init
- Is the (correct) heap-start-address value visible to sbrk?

Create a minimal example for the toolchain for which the original code
has been developed. Verify it works. Port the minimal example to the
GNU-toolchain, verify you see the same problem as with your "real"
application, pack everything (source incl. startup-code, linker-script,
makefile) together and place it on an "internet-server" and post the URL
here. If the other toolchain does not use linker-scripts and makefiles
try to find the "linker-setup-files" and "project-defintion-files" and
include them in the archive.

> Regards
> mk
Personaly I still prefer real names instead of pseudonyms and initials.


Martin Thomas