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- $OpenBSD: patch-gcc_config_exec-stack_h,v 1.1.1.1 2014/06/26 16:30:17 pascal Exp $
- --- gcc/config/exec-stack.h.orig Wed Oct 18 13:49:09 2006
- +++ gcc/config/exec-stack.h Wed Oct 18 13:49:04 2006
- @@ -0,0 +1,40 @@
- +/* 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"); \
- +}
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