Messages in this thread | | | Date | Thu, 04 Mar 2004 08:21:14 -0500 | From | Brian Gerst <> | Subject | Re: __buggy_fxsr_alignment() not found. |
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Igor Yu. Zhbanov wrote: > On Mon, 1 Mar 2004, Randy.Dunlap wrote: > > >>On Sun, 29 Feb 2004 20:02:12 +0300 (MSK) Igor Yu. Zhbanov wrote: >> >>| Hello! >>| My system is: >>| AMD K6-II 450 >>| Linux-2.4.24 >>| glibc-2.2.5 >>| >>| I cannot compile 2.4.24 kernel because linker says: >>| init/main.o: In function `check_fpu': >>| init/main.o(.text.init+0x53): undefined reference to `__buggy_fxsr_alignment' >>| >>| It's prototype is in inculude/asm-i386/bugs.h: >>| ----- >>| /* Enable FXSR and company _before_ testing for FP problems. */ >>| /* >>| * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned. >>| */ >>| if (offsetof(struct task_struct, thread.i387.fxsave) & 15) { >>| extern void __buggy_fxsr_alignment(void); >>| __buggy_fxsr_alignment(); >>| ----- >>| But there is no realisation of this function in source files. >>| When I comment the lines above, everything works. >>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>This function is not supposed to be defined anywhere. >>It is there to indicate a build error and to keep the kernel >>build from completing successfully. >> >>For some reason, with your config (and CPU arch.) and compiler, >>the 'fxsave' field is not on a 16-byte alignment. Have you applied >>any patches to 2.4.24? What version of gcc are you using (gcc -v)? >> > > > My compiler is pgcc-2.95.3 (gcc optimized for Pentium). > And I use security patch from OpenWall. > Here is my config file:
Get a newer compiler. It's either not getting the alignment of thread.i387.fxsave right or not optimizing the test away properly.
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