Add arm-nacl port.

1 files changed, 89 insertions, 0 deletions

diff --git a/sysdeps/nacl/dl-sysdep.c b/sysdeps/nacl/dl-sysdep.c
new file mode 100644
index 0000000000..3e902c2cae
--- /dev/null
+++ b/sysdeps/nacl/dl-sysdep.c
@@ -0,0 +1,89 @@
+/* Operating system support for run-time dynamic linker.  NaCl version.
+   Copyright (C) 2015 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef SHARED
+
+# include <assert.h>
+# include <ldsodefs.h>
+# include <stdint.h>
+# include <nacl-interfaces.h>
+
+/* NaCl's elf32.h is incompatible with the real <elf.h>.  */
+# define NATIVE_CLIENT_SRC_INCLUDE_ELF32_H_
+# include <native_client/src/untrusted/nacl/nacl_startup.h>
+
+/* The RTLD_START code sets up the pointer that gets to these
+   macros as COOKIE to point to two words:
+   [0] the argument to the entry point from the system (see nacl_startup.h)
+   [1] the stack base
+*/
+
+# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp)	\
+  do {								\
+    uint32_t *_info = ((void **) (cookie))[0];			\
+    (argc) = nacl_startup_argc (_info);				\
+    (argv) = nacl_startup_argv (_info);				\
+    (envp) = nacl_startup_envp (_info);				\
+    (auxp) = nacl_startup_auxv (_info);				\
+  } while (0)
+
+# define DL_STACK_END(cookie)	(((void **) (cookie))[1])
+
+/* This is called from the entry point (_start), defined by the RTLD_START
+   macro in the machine-specific dl-machine.h file.  At this point, dynamic
+   linking has been completed and the first argument is the application's
+   entry point.  */
+attribute_hidden internal_function __attribute__ ((noreturn))
+void
+_dl_start_user (void (*user_entry) (uint32_t info[]), uint32_t info[])
+{
+  if (_dl_skip_args > 0)
+    {
+      /* There are some arguments that the user program should not see.
+	 Just slide up the INFO pointer so its NACL_STARTUP_ARGV points
+	 to what should now be argv[0], and copy back the earlier fields.  */
+      assert (nacl_startup_argc (info) >= _dl_skip_args);
+      assert (NACL_STARTUP_ARGV == 3);
+      uint32_t envc = info[NACL_STARTUP_ENVC];
+      uint32_t argc = info[NACL_STARTUP_ARGC];
+      info += _dl_skip_args;
+      info[NACL_STARTUP_ENVC] = envc;
+      info[NACL_STARTUP_ARGC] = argc - _dl_skip_args;
+    }
+
+  /* Pass our finalizer function to the user.  */
+  info[NACL_STARTUP_FINI] = (uintptr_t) &_dl_fini;
+
+  /* Run initializers.  */
+  _dl_init (GL(dl_ns)[0]._ns_loaded,
+	    nacl_startup_argc (info),
+	    nacl_startup_argv (info),
+	    nacl_startup_envp (info));
+
+  /* Call the user's entry point.  This should never return.  */
+  (*user_entry) (info);
+
+  /* Fail clearly just in case it did return.  */
+  __builtin_trap ();
+}
+
+# define DL_SYSDEP_INIT	__nacl_initialize_interfaces ()
+
+#endif  /* SHARED */
+
+#include <elf/dl-sysdep.c>