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Re: [PATCH] S390: Refactor ifunc resolvers due to false debuginfo.

On 06/13/2016 04:39 PM, Joseph Myers wrote:
On Mon, 13 Jun 2016, Stefan Liebler wrote:

On 06/10/2016 06:59 PM, Joseph Myers wrote:
Are the debug info issues you describe unique to S/390 because of some
peculiarity of how S/390, and only S/390, defines IFUNC resolvers in
glibc, or do they apply to any other architectures as well and so need
fixes there?

The libc_ifunc macro in include/libc-symbols.h also uses the asm-name
and the debug-information contains the DW_AT_linkage_name field.

Then I think the goal should be to arrange things so that as much
infrastructure as possible is shared between architectures defining IFUNC
resolvers in C code, so that they all avoid this pitfall, rather than just
fixing one architecture.

Sorry for the delay. I had to wait for some test machines to be prepared. I have posted a patchset where the common libc_ifunc macro is adjusted and used by all architectures including s390.
Thus this patch is superseded by the patch series:
"[PATCH 1/8] Use gcc attribute ifunc in libc_ifunc macro instead of inline assembly due to false debuginfo."

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