Messages in this thread | | | Date | Wed, 25 Feb 2009 06:47:07 +0100 | From | Sam Ravnborg <> | Subject | Re: [PATCH/RFC] powerpc: avoid generating .eh_frame sections with gcc-4.4 |
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On Tue, Feb 24, 2009 at 01:51:12AM -0500, Kyle McMartin wrote: > From: Kyle McMartin <kyle@redhat.com> > > On ppc64 (at least) gcc-4.4 is defaulting to generating .eh_frame > sections, which are, for the kernel, fairly pointless. Additionally, on > ppc64 this generates a relocation format which the kernel module loader > does not currently support (R_PPC64_REL32.) > > Alexandre Oliva verifies that -fno-dwarf2-cfi-asm prevents this > .eh_frame section from being generated. > > These seem to be used for unwinding, but it doesn't look like we > currently use them anywhere. (In fact, we explicitly dump them in the > x86_64 linker script.) > > If these .eh_frame sections are eventually used, adding a per-arch > CONFIG_WANT_UNWIND check would be trivial. > > (This was reported against Fedora, which appears to be the only distro > doing any building against gcc-4.4 at present: RH bz#486545.) > > Signed-off-by: Kyle McMartin <kyle@redhat.com> > Cc: roland@redhat.com > Cc: aoliva@redhat.com
Kyle - can you resend wit an updated changelog reflecting the comments from Roland and Alexandre.
I got it wrong when reading the above - so chances are others does too.
Thanks, Sam
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