Messages in this thread | | | Subject | Re: 64 bit arithmetic in the kernel | Date | Wed, 14 Jul 1999 15:35:22 -0400 | From | Michael Richardson <> |
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>>>>> "Nat" == Nat Lanza <magus@cs.cmu.edu> writes: Nat> Michael Richardson <mcr@solidum.com> writes:
>> Is there any easy way to get things like the stuff that it >> is in libgcc1.a into the Linux kernel? I have need for 64/32 integer divide >> (gcc calls __udivdi3). >> This is with 2.2.10, on a Lintel box, and I'm using a module. >> >> I noticed that printk() doesn't have support for 64 bit quantities either.
Nat> We got around this by simply linking libgcc into the kernel; it seems Nat> to work okay for 64-bit arithmetic.
This worked wonderfully, and I thank the several people who suggested that I could just use "ld -r" to do this. Why isn't libgcc1.a linked into the kernel somewhere when compiling with GCC already? Or are the symbols not exported perhaps?
Nat> Also, patching printk so that it supports 64-bit quantities is pretty Nat> simple; I have a patch against 2.2.3 for that that I'll clean up and Nat> redo for 2.2.10 and then post.
Thanks, I appreciate this. I was about to do it, but my answer is all I need to print.
:!mcr!: | Solidum Systems Corporation, http://www.solidum.com Michael Richardson |For a better connected world,where data flows faster<tm> Personal: <A HREF="http://www.sandelman.ottawa.on.ca/People/Michael_Richardson/Bio.html">mcr@sandelman.ottawa.on.ca</A>. PGP key available. Corporate: <A HREF="mailto:mcr@solidum.com">mcr@solidum.com</A>.
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