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Re: [PATCH v6 01/16] sysdeps/init_array: Add PREINIT_FUNCTION to crti.S


On Fri, 26 Jan 2018 04:21:41 PST (-0800), joseph@codesourcery.com wrote:
On Thu, 25 Jan 2018, Palmer Dabbelt wrote:

This uses '.section .init_array,"aw"', while pt-crti.S contains
'.section .init_array,"a",%init_array'.  I think we should include the
'%init_array' section type as well.  Additionally, I'm not sure about

I think you should follow pt-crti.S exactly - using "a" not "aw" and using
%init_array.  You also need to remove the #include of <sys/asm.h>, which
is an architecture-specific header not available on most architectures.
OK with those changes.

the % vs @ distinction -- the gas documentation suggests that only ARM
uses '%', so maybe this generic directory should use '@' instead?  FWIW,
the RISC-V assembler appears to accept '%init_array' and '@init_array'.

% is valid everywhere.  @ is valid everywhere except platforms, such as
ARM, that use @ as a comment character that can start comments in the
middle of a line.  So in such an architecture-independent file, % is
appropriate.

Thanks. I've added a sort of TODO patch locally to my binutils tree to try to remind me to clarify the documentation.


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