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| 1 | /* System-specific settings for dynamic linker code. IA-64 version. |
|---|---|
| 2 | Copyright (C) 2003-2022 Free Software Foundation, Inc. |
| 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, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _LINUX_IA64_DL_SYSDEP_H |
| 20 | #define _LINUX_IA64_DL_SYSDEP_H 1 |
| 21 | |
| 22 | #include_next <dl-sysdep.h> |
| 23 | |
| 24 | /* Traditionally system calls have been made using break 0x100000. A |
| 25 | second method was introduced which, if possible, will use the EPC |
| 26 | instruction. To signal the presence and where to find the code the |
| 27 | kernel passes an AT_SYSINFO_EHDR pointer in the auxiliary vector to |
| 28 | the application. */ |
| 29 | #define NEED_DL_SYSINFO 1 |
| 30 | #define USE_DL_SYSINFO 1 |
| 31 | |
| 32 | #ifndef __ASSEMBLER__ |
| 33 | /* Don't declare this as a function---we want it's entry-point, not |
| 34 | it's function descriptor... */ |
| 35 | extern int _dl_sysinfo_break attribute_hidden; |
| 36 | # define DL_SYSINFO_DEFAULT ((uintptr_t) &_dl_sysinfo_break) |
| 37 | # define DL_SYSINFO_IMPLEMENTATION \ |
| 38 | asm (".text\n\t" \ |
| 39 | ".hidden _dl_sysinfo_break\n\t" \ |
| 40 | ".proc _dl_sysinfo_break\n\t" \ |
| 41 | "_dl_sysinfo_break:\n\t" \ |
| 42 | ".prologue\n\t" \ |
| 43 | ".altrp b6\n\t" \ |
| 44 | ".body\n\t" \ |
| 45 | "break 0x100000;\n\t" \ |
| 46 | "br.ret.sptk.many b6;\n\t" \ |
| 47 | ".endp _dl_sysinfo_break\n\t" \ |
| 48 | ".previous"); |
| 49 | #endif |
| 50 | |
| 51 | /* _dl_argv cannot be attribute_relro, because _dl_start_user |
| 52 | might write into it after _dl_start returns. */ |
| 53 | #define DL_ARGV_NOT_RELRO 1 |
| 54 | |
| 55 | #endif /* dl-sysdep.h */ |
| 56 |
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