[Bug libc/31302] glibc issue about reloc-type R_X86_64_TPOFF64 when llvm build golang project with cgo

[luofengwc at qq dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31302

--- Comment #7 from luofeng14 <luofengwc at qq dot com> ---
(In reply to luofeng14 from comment #6)
> (In reply to luofeng14 from comment #5)
> > (In reply to Florian Weimer from comment #3)
> > > Which linker are you using?
> > > 
> > > It is possible that for static PIE, we assume that the link editor is able
> > > to fully relax TLS relocations, that is, compute fixed constants and put
> > > them into the data segment or directly into the code (after instruction
> > > relaxation).
> > 
> > and it show some dlerror.o function .rela.dyn section sym relocate type
> > cause the problem. not the constant
> > 
> > Relocation section '.rela.dyn' at offset 0x85e0 contains 13252 entries:
> > 00000023df28  010b00000012 R_X86_64_TPOFF64  0000000000000078
> > __libc_dlerror_result + 0
> > 00000023df70  011100000012 R_X86_64_TPOFF64  0000000000000058
> > __libc_tsd_CTYPE_[...] + 0
> > 00000023dfc0  025700000012 R_X86_64_TPOFF64  0000000000000068
> > __libc_tsd_CTYPE_B + 0
> > 00000023dfc8  002400000012 R_X86_64_TPOFF64  0000000000000018
> > __libc_tsd_LOCALE + 0
> > 00000023dfe0  023b00000012 R_X86_64_TPOFF64  0000000000000060
> > __libc_tsd_CTYPE_[...] + 0
> 
> 
> sorry,  ____libc_dlerror_result is var not function;
> 
> thread struct dl_action_result *__libc_dlerror_result

 (In reply to luofeng14 from comment #6)
> (In reply to luofeng14 from comment #5)
> > (In reply to Florian Weimer from comment #3)
> > > Which linker are you using?
> > > 
> > > It is possible that for static PIE, we assume that the link editor is able
> > > to fully relax TLS relocations, that is, compute fixed constants and put
> > > them into the data segment or directly into the code (after instruction
> > > relaxation).
> > 
> > and it show some dlerror.o function .rela.dyn section sym relocate type
> > cause the problem. not the constant
> > 
> > Relocation section '.rela.dyn' at offset 0x85e0 contains 13252 entries:
> > 00000023df28  010b00000012 R_X86_64_TPOFF64  0000000000000078
> > __libc_dlerror_result + 0
> > 00000023df70  011100000012 R_X86_64_TPOFF64  0000000000000058
> > __libc_tsd_CTYPE_[...] + 0
> > 00000023dfc0  025700000012 R_X86_64_TPOFF64  0000000000000068
> > __libc_tsd_CTYPE_B + 0
> > 00000023dfc8  002400000012 R_X86_64_TPOFF64  0000000000000018
> > __libc_tsd_LOCALE + 0
> > 00000023dfe0  023b00000012 R_X86_64_TPOFF64  0000000000000060
> > __libc_tsd_CTYPE_[...] + 0
> 
> 
> sorry,  ____libc_dlerror_result is var not function;
> 
> thread struct dl_action_result *__libc_dlerror_result

and __libc_dlerror_result is not constant

glibc/glibc-2.34/dlfcn/dlerror.c
  49,7:       __libc_dlerror_result = NULL;
  62,7:       __libc_dlerror_result = NULL;
  120,4:          __libc_dlerror_result = NULL;
  153,4:          __libc_dlerror_result = NULL;
  175,8:              __libc_dlerror_result = dl_action_result_malloc_failed;
  178,4:          __libc_dlerror_result = result;

glibc/glibc-2.34/dlfcn/libc_dlerror_result.c
  37,7:       __libc_dlerror_result = NULL;

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