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Re: hail marry (booting PowerMac 8600)

From: Ian Lance Taylor <iant at google dot com>
To: kevin diggs <diggskevin38 at gmail dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Fri, 21 Jan 2011 18:35:37 -0800
Subject: Re: hail marry (booting PowerMac 8600)
References: <AANLkTikWDgoZzGhEHykTZu3W8YuZu_=t00B++JvcARku@mail.gmail.com>

kevin diggs <diggskevin38@gmail.com> writes:

> I have a Linux kernel 2.6.28 compiled with 3.4.6 that will boot. Same
> source compiled with 4.3.5 will not boot. The 4.3.5 file has a section
> '.text.unlikely' that 3.4.6 does not have. Anyone know what this might
> be?

The .text.unlikely section is used for code which is considered to be
unlikely to ever executed.  The compiler should only generate it if you
use the -freorder-blocks-and-partition option.  Of course it's possible
that the kernel itself uses it, though I suppose that is not the case if
you don't see it when compiling with 3.4.6.

Ian

References:
- hail marry (booting PowerMac 8600)
  - From: kevin diggs

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