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08f43f9bbf
Add support for STT_GNU_IFUNC symbols and the new R_390_IRELATIVE relocation. Provide optimized version of memcpy, memset, and memcmp for z10 and z196.
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* Machine-dependent ELF indirect relocation inline functions.
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Version for S/390 32 and 64 bit.
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Copyright (C) 2012 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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<http://www.gnu.org/licenses/>. */
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#ifndef _DL_IREL_H
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#define _DL_IREL_H
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#include <stdio.h>
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#include <unistd.h>
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#include <ldsodefs.h>
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#define ELF_MACHINE_IRELA 1
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static inline ElfW(Addr)
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__attribute ((always_inline))
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elf_ifunc_invoke (ElfW(Addr) addr)
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{
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return ((ElfW(Addr) (*) (unsigned long int)) (addr)) (GLRO(dl_hwcap));
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}
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static inline void
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__attribute ((always_inline))
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elf_irela (const ElfW(Rela) *reloc)
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{
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ElfW(Addr) *const reloc_addr = (void *) reloc->r_offset;
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const unsigned long int r_type = ELFW(R_TYPE) (reloc->r_info);
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if (__builtin_expect (r_type == R_390_IRELATIVE, 1))
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{
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ElfW(Addr) value = elf_ifunc_invoke(reloc->r_addend);
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*reloc_addr = value;
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}
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else
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__libc_fatal ("unexpected reloc type in static binary");
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}
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#endif /* dl-irel.h */
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