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31a9bc8c55
libgcc ifunc resolvers that access hwcap via a field in the tcb can't be called until the thread pointer is set up. Other ifunc resolvers might need access to at_platform. This patch sets up a fake thread pointer early to a copy of tcbhead_t. hwcapinfo.c already had local variables for hwcap and at_platform, replace them with an entire tcbhead_t. It's not that large and this way we easily ensure hwcap and at_platform are at the same relative offsets as they are in the real thread block. The patch also conditionally disables part of tst-tlsifunc-static, "bar address read from IFUNC resolver is incorrect". We can't get a proper address for a thread variable before glibc initialises tls. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
21 lines
925 B
C
21 lines
925 B
C
/* Test if an executable can read from the TLS from an STT_GNU_IFUNC resolver.
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TST_TLSIFUNC_STATIC 1
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#include "tst-tlsifunc.c"
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