[Bug libc/22053] New: Remove zero terminator for .eh_frame section in elf/sofini.c

["hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22053

            Bug ID: 22053
           Summary: Remove zero terminator for .eh_frame section in
                    elf/sofini.c
           Product: glibc
           Version: 2.27
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

elf/sofini.c has

/* Terminate the frame unwind info section with a 4byte 0 as a sentinel;
   this would be the 'length' field in a real FDE.  */

typedef unsigned int ui32 __attribute__ ((mode (SI)));
static const ui32 __FRAME_END__[1]
  __attribute__ ((used, section (".eh_frame")))
  = { 0 };

It was added before -eh-frame-hdr is added to ld.  Since -eh-frame-hdr is
always used to build libc.so, zero terminator in elf/sofini.c can be
removed.

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