Date: Fri, 13 Mar 2015 20:38:23 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r279937 - in head/sys/powerpc: include powerpc Message-ID: <20150313183823.GB2379@kib.kiev.ua> In-Reply-To: <550328C2.6060602@freebsd.org> References: <20150312212234.GS2379@kib.kiev.ua> <55020547.7050102@freebsd.org> <20150312213530.GT2379@kib.kiev.ua> <5502094D.5090001@freebsd.org> <20150313084702.GV2379@kib.kiev.ua> <550318FD.1070906@freebsd.org> <20150313172345.GY2379@kib.kiev.ua> <5503224A.3010100@freebsd.org> <20150313175931.GA2379@kib.kiev.ua> <550328C2.6060602@freebsd.org>
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On Fri, Mar 13, 2015 at 11:13:22AM -0700, Nathan Whitehorn wrote: > The compiler assumes that f14-f31 and v20-v31 are preserved by setjmp() > (and, e.g. glibc's setjmp() does in fact preserve them). It also tries > not to use those registers too much, so the practical impact is limited, > but it should actually be fixed. I think that the setjmp/longjmp case would benefit greatly from the versioning of the symbols. Versioning cannot solve all ABI issues, e.g. if you compiler used old machine/setjmp.h and then link resulting .o with newer libc, but for complete builds it will help and keep old binaries working not worse than now.
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