Fwd: printf does not work

Christian Haake chaake@mailbox.tu-berlin.de
Wed Oct 24 16:10:00 GMT 2012

while evaluating our implemented syscall stubs i figured out that printf does not work as expected for our small embedded arm project. (with arm-elf toolchain)
I've implemented sbrk and it seems to work. Even if I use iprintf or siprintf, which should not use malloc from what I figured out I do not end up in write syscall from where I want to put the formatted string to serial out. Shouldn't a printf always end up in the write syscall? What can go wrong within the newlib to not end up in "write"?
I would appreciate any help.

PS: this is how I configure the newlib: ./configure --target=$targ --prefix=$libc --disable-newlib-supplied-syscalls (where $targ is arm-elf)

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