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44 lines
1.9 KiB
C
44 lines
1.9 KiB
C
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/* MIPS-specific handling of undefined symbols.
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Copyright (C) 2008-2020 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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#ifndef _ELF_MACHINE_SYM_NO_MATCH_H
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#define _ELF_MACHINE_SYM_NO_MATCH_H
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#include <link.h>
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#include <stdbool.h>
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/* The semantics of zero/non-zero values of undefined symbols differs
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depending on whether the non-PIC ABI is in use. Under the non-PIC
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ABI, a non-zero value indicates that there is an address reference
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to the symbol and thus it must always be resolved (except when
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resolving a jump slot relocation) to the PLT entry whose address is
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provided as the symbol's value; a zero value indicates that this
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canonical-address behaviour is not required. Yet under the classic
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MIPS psABI, a zero value indicates that there is an address
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reference to the function and the dynamic linker must resolve the
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symbol immediately upon loading. To avoid conflict, symbols for
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which the dynamic linker must assume the non-PIC ABI semantics are
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marked with the STO_MIPS_PLT flag. */
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static inline bool
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elf_machine_sym_no_match (const ElfW(Sym) *sym)
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{
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return sym->st_shndx == SHN_UNDEF && !(sym->st_other & STO_MIPS_PLT);
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}
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#endif /* _ELF_MACHINE_SYM_NO_MATCH_H */
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