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78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
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/* System-specific settings for dynamic linker code. IA-64 version.
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Copyright (C) 2003, 2004, 2006, 2008 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _DL_SYSDEP_H
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#define _DL_SYSDEP_H 1
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/* This macro must be defined to either 0 or 1.
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If 1, then an errno global variable hidden in ld.so will work right with
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all the errno-using libc code compiled for ld.so, and there is never a
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need to share the errno location with libc. This is appropriate only if
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all the libc functions that ld.so uses are called without PLT and always
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get the versions linked into ld.so rather than the libc ones. */
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#ifdef IS_IN_rtld
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# define RTLD_PRIVATE_ERRNO 1
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#else
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# define RTLD_PRIVATE_ERRNO 0
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#endif
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/* Traditionally system calls have been made using break 0x100000. A
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second method was introduced which, if possible, will use the EPC
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instruction. To signal the presence and where to find the code the
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kernel passes an AT_SYSINFO_EHDR pointer in the auxiliary vector to
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the application. */
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#define NEED_DL_SYSINFO 1
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#define USE_DL_SYSINFO 1
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#if defined NEED_DL_SYSINFO && !defined __ASSEMBLER__
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/* Don't declare this as a function---we want it's entry-point, not
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it's function descriptor... */
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extern int _dl_sysinfo_break attribute_hidden;
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# define DL_SYSINFO_DEFAULT ((uintptr_t) &_dl_sysinfo_break)
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# define DL_SYSINFO_IMPLEMENTATION \
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asm (".text\n\t" \
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".hidden _dl_sysinfo_break\n\t" \
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".proc _dl_sysinfo_break\n\t" \
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"_dl_sysinfo_break:\n\t" \
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".prologue\n\t" \
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".altrp b6\n\t" \
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".body\n\t" \
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"break 0x100000;\n\t" \
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"br.ret.sptk.many b6;\n\t" \
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".endp _dl_sysinfo_break\n\t" \
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".previous");
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#endif
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/* _dl_argv cannot be attribute_relro, because _dl_start_user
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might write into it after _dl_start returns. */
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#define DL_ARGV_NOT_RELRO 1
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/* The _dl_discover_osversion function is so far only needed in sysconf
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to check for kernels later than 2.6.23. */
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#if !defined __ASSEMBLER__ && __LINUX_KERNEL_VERSION < 0x020617
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/* Get version of the OS. */
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extern int _dl_discover_osversion (void) attribute_hidden;
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# define HAVE_DL_DISCOVER_OSVERSION 1
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#endif
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#endif /* dl-sysdep.h */
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