SecBSD's official ports repository

lang/gcc/11/patches/patch-gcc_config_exec-stack_h

@@ -0,0 +1,43 @@
+--- 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");				\
++}