| /* System-specific settings for dynamic linker code. IA-32 version. |
| Copyright (C) 2002, 2003, 2008 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _DL_SYSDEP_H |
| #define _DL_SYSDEP_H 1 |
| |
| /* This macro must be defined to either 0 or 1. |
| |
| If 1, then an errno global variable hidden in ld.so will work right with |
| all the errno-using libc code compiled for ld.so, and there is never a |
| need to share the errno location with libc. This is appropriate only if |
| all the libc functions that ld.so uses are called without PLT and always |
| get the versions linked into ld.so rather than the libc ones. */ |
| |
| #ifdef IS_IN_rtld |
| # define RTLD_PRIVATE_ERRNO 1 |
| #else |
| # define RTLD_PRIVATE_ERRNO 0 |
| #endif |
| |
| /* Traditionally system calls have been made using int $0x80. A |
| second method was introduced which, if possible, will use the |
| sysenter/syscall instructions. To signal the presence and where to |
| find the code the kernel passes an AT_SYSINFO value in the |
| auxiliary vector to the application. */ |
| #define NEED_DL_SYSINFO 1 |
| #define USE_DL_SYSINFO 1 |
| |
| #if defined NEED_DL_SYSINFO && !defined __ASSEMBLER__ |
| extern void _dl_sysinfo_int80 (void) attribute_hidden; |
| # define DL_SYSINFO_DEFAULT (uintptr_t) _dl_sysinfo_int80 |
| # define DL_SYSINFO_IMPLEMENTATION \ |
| asm (".text\n\t" \ |
| ".type _dl_sysinfo_int80,@function\n\t" \ |
| ".hidden _dl_sysinfo_int80\n" \ |
| CFI_STARTPROC "\n" \ |
| "_dl_sysinfo_int80:\n\t" \ |
| "int $0x80;\n\t" \ |
| "ret;\n\t" \ |
| CFI_ENDPROC "\n" \ |
| ".size _dl_sysinfo_int80,.-_dl_sysinfo_int80\n\t" \ |
| ".previous"); |
| #endif |
| |
| |
| /* The _dl_discover_osversion function is so far only needed in sysconf |
| to check for kernels later than 2.6.23. */ |
| #if !defined __ASSEMBLER__ && __LINUX_KERNEL_VERSION < 0x020617 |
| /* Get version of the OS. */ |
| extern int _dl_discover_osversion (void) attribute_hidden; |
| # define HAVE_DL_DISCOVER_OSVERSION 1 |
| #endif |
| |
| #endif /* dl-sysdep.h */ |