relocation of DW_AT_low_pc against non-exec and/or non-alloc section

[Petr Machata <pmachata at redhat dot com>]

Hi,

I'm getting a couple cases where a relocation of DW_AT_low_pc and 
DW_AT_high_pc attribute is formed against a section that's either 
non-EXEC, or even non-ALLOC.

The case of non-EXEC is in .rodata of vmlinux.  A single die that comes 
from arch/x86/kernel/trampoline_32.S has this property.  So I shift my 
understanding of low_pc and high_pc from "we can expect PC to have this 
address" to "it's a place in address space".

Another case is basically any GRUB module.  These have relocations of 
low_pc and high_pc formed against .moddeps, which is non-ALLOC section 
(which, if I understand things correctly, means it doesn't end up in 
address space at all).

So, is my ALLOC & EXEC expectation valid?  If it's too strict, is any 
ALLOC section kosher, and GRUB modules are erroneous, or is any section 
at all kosher?

PM

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