[Bug gprofng/28984] New: Bad __collector_getpc implementation

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28984

            Bug ID: 28984
           Summary: Bad __collector_getpc implementation
           Product: binutils
           Version: 2.39 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gprofng
          Assignee: vladimir.mezentsev at oracle dot com
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: x86-64

libcollector/libcol_util.h has

static __attribute__ ((always_inline)) inline void *
__collector_getpc ()
{
  void *r; 
  __asm__ __volatile__(
#if WSIZE(32)
          "     call  1f \n"
                       "1: popl  %0 \n"
#else
          "     call  1f \n"
                       "1: popq  %0 \n"
#endif
          : "=r" (r)); // output
  return r;
}

But x86-64 supports "lea (%rip), %reg".

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