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Weird issues. Linker + arm/thumb interworking / stub is not implemented.
- From: Sylvain Becker <sylvain dot becker at gmail dot com>
- To: binutils at sources dot redhat dot com
- Date: Sun, 19 Jun 2005 20:32:24 +0200
- Subject: Weird issues. Linker + arm/thumb interworking / stub is not implemented.
- Reply-to: Sylvain Becker <sylvain dot becker at gmail dot com>
Hi,
This may not be the correct mailing list for this question.
My cross-compilation chain for ARM/THUMB for xscale doesn't behave
correctly during linking step. (use gcc-3.4.3 / glibc-2.3.3 /
binutils-2.15 / linux-2.6.10 ).
This file is built for ARM with -mthumb-interwork:
int main(){
thumb_call();
return 0;
}
This one, in Thumb with -mthumb-interwork:
void thumb_call(){
int x=0;
x++;
}
Each object dump seems correct.
It links without warning/errors.
But the executable contains something wrong:
main() call a "stub" function: "thumb_call_FROM_ARM" which should
take care of the interworking, specially switching from ARM to Thumb
and jumping to "thumb_call".
This stub is actually empty, and since, it's at the end of the object,
the programm exits "correctly".
Problem doesn't appear, if I ask GCC to ask a static linking (-static
-static-libc),
because _thumb_call_FROM_ARM is be implemented correctly.
My question aims at somebody who would have encounter that kind of problem.
Maybe just a problem while rebuilding toolchain. (options were:
softfloat/interworking/xscale/).
Thanks for any help,
Sylvain Becker