1 files changed, 52 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/dl-execstack.c b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/dl-execstack.c
new file mode 100644
index 0000000000..2b6c3baadb
--- /dev/null
+++ b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/dl-execstack.c
@@ -0,0 +1,52 @@
+/* Stack executability handling for GNU dynamic linker.  OpenSolaris version.
+   Copyright (C) 2003, 2004, 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <ldsodefs.h>
+#include <errno.h>
+#include <sys/ucontext.h>
+#include <sys/syscall.h>
+
+/* There is no portable way to know the bounds of the initial thread's stack
+   so as to mprotect it.  */
+
+int
+internal_function
+_dl_make_stack_executable (void **stack_endp)
+{
+  /* We can get the stack base and size from getcontext.  */
+  sysret_t ret;
+  ucontext_t ctx;
+  int errval = __systemcall (&ret, SYS_context, GETCONTEXT, &ctx);
+  if (errval != 0)
+    return errval;
+
+  /* The given stack pointer better be in range.  */
+  if (*stack_endp < ctx.uc_stack.ss_sp ||
+        *stack_endp > (ctx.uc_stack.ss_sp + ctx.uc_stack.ss_size))
+    return ENOTSUP;
+
+  errval = __systemcall (&ret, SYS_mprotect, ctx.uc_stack.ss_sp,
+      ctx.uc_stack.ss_size, PROT_READ | PROT_WRITE | PROT_EXEC);
+  if (errval != 0)
+    return errval;
+
+  *stack_endp = NULL;
+  return 0;
+}
+rtld_hidden_def (_dl_make_stack_executable)