On Tue, Nov 8, 2011 at 5:33 AM, Mike Frysinger <vap...@gentoo.org> wrote:
> On Tuesday 08 November 2011 04:27:44 Gabe Black wrote: > > When gcc compiles some 64 bit operations on a 32 bit machine, it > generates > > calls to small functions instead of instructions which do the job > directly. > > Those functions are defined in libgcc and transparently provide whatever > > functionality was necessary. Unfortunately, u-boot can be built with a > > non-standard ABI when libgcc isn't. When the two are linked together, > very > > confusing bugs can crop up, for instance seemingly normal integer > division > > or modulus getting the wrong answer or even raising a spurious divide by > > zero exception. > > might be good to explicitly mention that this is due to u-boot using > -mregparm > > > --- a/arch/x86/config.mk > > +++ b/arch/x86/config.mk > > > > +LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds > > looks like some old code sneaked in. bad rebase ? > Yep, that's right. The original change doesn't have that line so it must have slipped in during a rebase. Gabe
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