| /* 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!) */ |
