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c776b3d7 | 1 | /* System-specific settings for dynamic linker code. IA-64 version. |
a334319f | 2 | Copyright (C) 2003, 2004 Free Software Foundation, Inc. |
c776b3d7 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #ifndef _DL_SYSDEP_H | |
21 | #define _DL_SYSDEP_H 1 | |
22 | ||
23 | /* This macro must be defined to either 0 or 1. | |
24 | ||
25 | If 1, then an errno global variable hidden in ld.so will work right with | |
26 | all the errno-using libc code compiled for ld.so, and there is never a | |
27 | need to share the errno location with libc. This is appropriate only if | |
28 | all the libc functions that ld.so uses are called without PLT and always | |
29 | get the versions linked into ld.so rather than the libc ones. */ | |
30 | ||
31 | #ifdef IS_IN_rtld | |
32 | # define RTLD_PRIVATE_ERRNO 1 | |
33 | #else | |
34 | # define RTLD_PRIVATE_ERRNO 0 | |
35 | #endif | |
36 | ||
37 | /* Traditionally system calls have been made using break 0x100000. A | |
38 | second method was introduced which, if possible, will use the EPC | |
39 | instruction. To signal the presence and where to find the code the | |
40 | kernel passes an AT_SYSINFO_EHDR pointer in the auxiliary vector to | |
41 | the application. */ | |
42 | #define NEED_DL_SYSINFO 1 | |
43 | #define USE_DL_SYSINFO 1 | |
44 | ||
45 | #if defined NEED_DL_SYSINFO && !defined __ASSEMBLER__ | |
46 | /* Don't declare this as a function---we want it's entry-point, not | |
47 | it's function descriptor... */ | |
48 | extern int _dl_sysinfo_break attribute_hidden; | |
49 | # define DL_SYSINFO_DEFAULT ((uintptr_t) &_dl_sysinfo_break) | |
50 | # define DL_SYSINFO_IMPLEMENTATION \ | |
51 | asm (".text\n\t" \ | |
52 | ".hidden _dl_sysinfo_break\n\t" \ | |
53 | ".proc _dl_sysinfo_break\n\t" \ | |
54 | "_dl_sysinfo_break:\n\t" \ | |
55 | ".prologue\n\t" \ | |
56 | ".altrp b6\n\t" \ | |
57 | ".body\n\t" \ | |
58 | "break 0x100000;\n\t" \ | |
59 | "br.ret.sptk.many b6;\n\t" \ | |
a334319f | 60 | ".endp _dl_sysinfo_break" \ |
c776b3d7 UD |
61 | ".previous"); |
62 | #endif | |
63 | ||
6e21902a UD |
64 | /* _dl_argv cannot be attribute_relro, because _dl_start_user |
65 | might write into it after _dl_start returns. */ | |
66 | #define DL_ARGV_NOT_RELRO 1 | |
67 | ||
c776b3d7 | 68 | #endif /* dl-sysdep.h */ |