[Bug libdw/22452] Failed to obtain CFI data for a OP_call_frame_CFA when looking for func entrypoc in an s390 kernel module

[krebbel at linux dot vnet.ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22452

--- Comment #11 from Andreas Krebbel <krebbel at linux dot vnet.ibm.com> ---
x86 enables generation of .debug_frame by using:

KBUILD_CFLAGS += -fno-asynchronous-unwind-tables

in the kernel Makefile.  This makes GCC to add ".cfi_sections .debug_frame" to
the assembler output which in turn triggers gas to generate the section.

I don't see a reason why we couldn't do the same for s390. The .eh_frame
section aren't used in the kernel.

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