45 lines
1.8 KiB
Plaintext
45 lines
1.8 KiB
Plaintext
$OpenBSD: patch-gcc_config_exec-stack_h,v 1.1 2006/10/20 13:43:18 espie Exp $
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--- gcc/config/exec-stack.h.orig Wed Oct 18 13:49:09 2006
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+++ gcc/config/exec-stack.h Wed Oct 18 13:49:04 2006
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@@ -0,0 +1,40 @@
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+/* Enable stack execute around trampoline address.
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+ Copyright (C) 2002 Free Software Foundation, Inc.
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+
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+This file is part of GNU CC.
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+
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+GNU CC is free software; you can redistribute it and/or modify
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+it under the terms of the GNU General Public License as published by
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+the Free Software Foundation; either version 2, or (at your option)
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+any later version.
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+
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+GNU CC is distributed in the hope that it will be useful,
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+but WITHOUT ANY WARRANTY; without even the implied warranty of
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+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+GNU General Public License for more details.
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+
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+You should have received a copy of the GNU General Public License
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+along with GNU CC; see the file COPYING. If not, write to
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+the Free Software Foundation, 59 Temple Place - Suite 330,
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+Boston, MA 02111-1307, USA. */
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+
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+#undef FINALIZE_TRAMPOLINE
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+#define FINALIZE_TRAMPOLINE(TRAMP) \
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+ emit_library_call(gen_rtx_SYMBOL_REF (Pmode, "__enable_execute_stack"), \
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+ 0, VOIDmode, 1, memory_address (SImode, (TRAMP)), Pmode)
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+
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+#undef TRANSFER_FROM_TRAMPOLINE
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+#define TRANSFER_FROM_TRAMPOLINE \
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+extern void __enable_execute_stack (void *); \
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+void \
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+__enable_execute_stack (addr) \
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+ void *addr; \
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+{ \
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+ long size = getpagesize (); \
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+ long mask = ~(size-1); \
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+ char *page = (char *) (((long) addr) & mask); \
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+ char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
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+ \
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+ if (mprotect (page, end - page, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) \
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+ perror ("mprotect of trampoline code"); \
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+}
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