I have a custom build module with some float operations in it. I build a
2.4.17 kernel for a mips32 core (BCM6348 chip). It boots up fine, busybox
works nicely, also some other apps like dropbear and thttpd do what they are
expected to do.
I build everything with soft-floats using a uclibc toolchain (kernel +
filesystem). This is the configuration of my toolchain.
Reading specs from
--build=i386-pc-linux-gnu --host=i386-pc-linux-gnu --target=mips-linux-uclibc
--enable-languages=c,c++ --enable-shared --disable-__cxa_atexit
--enable-target-optspace --with-gnu-ld --disable-nls --enable-multilib
Thread model: posix
gcc driver version 3.3.4 executing gcc version 3.3.3
The module builds fine also, but when insmodding I get the following error.
insmod: unresolved symbol __fixdfsi
insmod: unresolved symbol __floatsidf
insmod: unresolved symbol __muldf3
insmod: unresolved symbol __adddf3
As these are all float operations I am wondering about the following things:
1.why they are in there? I have a soft-float toolchain....
2.Is there float support in the kernel? While googling for it I found a few
things talking about FP point in the kernel. Does it have something to do with
the Algorithmics/MIPS FPU emulator. (Although it does not work emulator or
not. Which I expected because it should only be used by apps which emit FPU
calls, and this should not happen because I use a softfloat toolchain). So I
expect it does not really have something to do with this.
3.I took care of using the same compiler options as the kernel compilation
uses. I guess this is the correct way, and the problems are thus not related
Any pointers to a solution would be helpful. I am trying woth a hard-float
toolchain now (it only takes a while to compile everything). I could also not
dig up anything similar in the archives.
| Philippe De Swert -GNU/linux - uClinux freak-
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