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From: "jason at zx2c4 dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug build/28595] glibc-2.34 build fails with linker error (TLS
 transition from R_386_TLS_GOTIE to R_386_TLS_LE_32 against
 `__libc_tsd_CTYPE_B' at 0xf4 in section `.text' failed)
Date: Mon, 15 Nov 2021 13:59:47 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28595

--- Comment #7 from Jason A. Donenfeld <jason at zx2c4 dot com> ---
Wow, gcc is wild. It looks like it's converting that ctypes indexing into a
kmovd, into the mask register (even in 32-bit mode, woah):

movsx   eax, dl
kmovd   k0, ds:(__libc_tsd_CTYPE_B_tpoff - _GLOBAL_OFFSET_TABLE_)[ebx]
kmovd   edx, k0
kmovd   k0, dword ptr gs:[edx]
kmovd   edx, k0
test    byte ptr [edx+eax*2+1], 20h
jz      short loc_80000B0

Presumably when this happens, gcc isn't emitting the right type of relocati=
on.
It assumes it's a local-exec instead of an init-exec, or something like tha=
t?
Notably, that symbol is declared with `__attribute__ ((tls_model
("initial-exec")))`.

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