52b05d6607
When ifuncs are used in statically linked binaries, the C runtime must perform the needed dynamic relocations, to make calls to ifuncs work correctly. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D21070
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/*-
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* Copyright (c) 2019 Leandro Lupori
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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static void
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crt1_handle_rela(const Elf_Rela *r)
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{
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typedef Elf_Addr (*ifunc_resolver_t)(
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uint32_t, uint32_t, uint64_t, uint64_t,
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uint64_t, uint64_t, uint64_t, uint64_t);
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Elf_Addr *ptr, *where, target;
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switch (ELF_R_TYPE(r->r_info)) {
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case R_PPC_IRELATIVE:
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ptr = (Elf_Addr *)r->r_addend;
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where = (Elf_Addr *)r->r_offset;
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target = ((ifunc_resolver_t)ptr)(cpu_features, cpu_features2,
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0, 0, 0, 0, 0, 0);
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*where = target;
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break;
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}
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}
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