On Thu, 22 Jan 2009 00:52:13 +0000 Andrew Brampton <brampton+freebsd-hack...@gmail.com> wrote:
> 2009/1/21 Alexander Kabaev <kab...@gmail.com>: > > From GCC's info pages: > > > > Most of the compiler support routines used by GCC are present in > > `libgcc', but there are a few exceptions. GCC requires the > > freestanding environment provide `memcpy', `memmove', `memset' and > > `memcmp'. > > </end quote> > > > > We do not provide all necessary functions in kernel and mostly > > depend on luck for the kernel to link. Your luck apparently ran > > out :( > > > > Thanks for the info, good thing I'm not a gambling man. Anyway I also > read that part of the GCC manual, so my next question is: If code can > be generated with those four functions, why are they not exported by > the kernel? Surely another kernel module will at some point also be > hit by this? > > thanks > Andrew Very good question and the answer is simple: we do not export these functions because nobody needed them yet :) Historically we have grown these functions on an 'as needed' basis. I am sure the patch to add missing functions would get committed if it were made available. <hint> -- Alexander Kabaev
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