/* LLVM LOCAL begin (ENTIRE FILE!) */ /* Enable stack execute around trampoline address. Copyright (C) 2002 Free Software Foundation, Inc. This file is part of GNU CC. GNU CC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU CC 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 General Public License for more details. You should have received a copy of the GNU General Public License along with GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #undef FINALIZE_TRAMPOLINE #define FINALIZE_TRAMPOLINE(TRAMP) \ emit_library_call(gen_rtx_SYMBOL_REF (Pmode, "__enable_execute_stack"), \ 0, VOIDmode, 1, memory_address (SImode, (TRAMP)), Pmode) #undef TRANSFER_FROM_TRAMPOLINE #define TRANSFER_FROM_TRAMPOLINE \ extern void __enable_execute_stack (void *); \ void \ __enable_execute_stack (addr) \ void *addr; \ { \ long size = getpagesize (); \ long mask = ~(size-1); \ char *page = (char *) (((long) addr) & mask); \ char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ \ if (mprotect (page, end - page, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) \ perror ("mprotect of trampoline code"); \ } /* LLVM LOCAL end (ENTIRE FILE!) */