| /* Assembler macros for x86-64. |
| Copyright (C) 2001, 2002, 2003 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 _AKAROS_X86_64_SYSDEP_H |
| #define _AKAROS_X86_64_SYSDEP_H 1 |
| |
| /* Various bits copied from Linux and its #included sysdep.h */ |
| |
| #include <sysdeps/generic/sysdep.h> |
| #include <sysdeps/x86_64/sysdep.h> |
| #include <tls.h> |
| |
| #ifdef IS_IN_rtld |
| # include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ |
| #endif |
| |
| /* Pointer mangling support. */ |
| #if defined NOT_IN_libc && defined IS_IN_rtld |
| /* We cannot use the thread descriptor because in ld.so we use setjmp |
| earlier than the descriptor is initialized. */ |
| # ifdef __ASSEMBLER__ |
| # define PTR_MANGLE(reg) xor __pointer_chk_guard_local(%rip), reg; \ |
| rol $2*LP_SIZE+1, reg |
| # define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \ |
| xor __pointer_chk_guard_local(%rip), reg |
| # else |
| # define PTR_MANGLE(reg) asm ("xor __pointer_chk_guard_local(%%rip), %0\n" \ |
| "rol $2*" LP_SIZE "+1, %0" \ |
| : "=r" (reg) : "0" (reg)) |
| # define PTR_DEMANGLE(reg) asm ("ror $2*" LP_SIZE "+1, %0\n" \ |
| "xor __pointer_chk_guard_local(%%rip), %0" \ |
| : "=r" (reg) : "0" (reg)) |
| # endif |
| #else |
| # ifdef __ASSEMBLER__ |
| # define PTR_MANGLE(reg) xor %fs:POINTER_GUARD, reg; \ |
| rol $2*LP_SIZE+1, reg |
| # define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \ |
| xor %fs:POINTER_GUARD, reg |
| # else |
| # define PTR_MANGLE(var) asm ("xor %%fs:%c2, %0\n" \ |
| "rol $2*" LP_SIZE "+1, %0" \ |
| : "=r" (var) \ |
| : "0" (var), \ |
| "i" (offsetof (tcbhead_t, \ |
| pointer_guard))) |
| # define PTR_DEMANGLE(var) asm ("ror $2*" LP_SIZE "+1, %0\n" \ |
| "xor %%fs:%c2, %0" \ |
| : "=r" (var) \ |
| : "0" (var), \ |
| "i" (offsetof (tcbhead_t, \ |
| pointer_guard))) |
| # endif |
| #endif |
| |
| #endif /* akaros/x86_64/sysdep.h */ |
