[MIPS] Implementation of sel_ldr for MIPS architecture.

tools/trusted_cross_toolchains/setup_mips32_trusted_toolchain.py

+#!/usr/bin/python
+# Copyright (c) 2012 The Native Client Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# MIPS32 TOOLCHAIN SETTINGS FOR TRUSTED CODE
+#
+# This can either be imported as a python script
+# or used in a shell script, by doing:
+#   eval "$(tools/llvm/setup_mips32_trusted_toolchain.py)"
+#
+#
+# If imported as a python script, it provides two variables:
+#  mips32_env = dictionary of MIPS32 environment
+#  shell_exports = keys which are normally exported to the shell environment
+
+import os
+import sys
+
+if os.path.basename(os.getcwd()) != 'native_client':
+  print "Error: Run this script from native_client/"
+  sys.exit(1)
+
+# Alias for convenience
+J = os.path.join
+
+NACL_ROOT = os.getcwd()
+BASE_DIR = J(NACL_ROOT, 'toolchain', 'linux_mips-trusted')
+MIPS32_CROSS_TARGET = 'mips-linux-gnu'
+CODE_SOURCERY_PREFIX = J(BASE_DIR, 'mips-release', 'bin', MIPS32_CROSS_TARGET)
+CODE_SOURCERY_JAIL = J(BASE_DIR, 'mips-release', MIPS32_CROSS_TARGET, 'libc', 'el')
+LD_SCRIPT_TRUSTED = J(BASE_DIR, 'ld_script_mips_trusted')
+
+BASE_CC = ("%s-%%s -Werror -O2 %%s "
+           "-fdiagnostics-show-option "
+           "-I%s/usr/include -march=mips32r2 -EL "
+           "-Wl,-EL -Wl,-T -Wl,%s") % (CODE_SOURCERY_PREFIX,
+                              CODE_SOURCERY_JAIL,
+                              LD_SCRIPT_TRUSTED)
+
+# Shell exports
+MIPS32_CC  = BASE_CC % ('gcc', '-std=gnu99')
+MIPS32_CXX = BASE_CC % ('g++', '')
+MIPS32_LD = '%s-ld' % CODE_SOURCERY_PREFIX
+MIPS32_LINKFLAGS = ''
+MIPS32_LIB_DIR = J(CODE_SOURCERY_JAIL, 'usr', 'lib')
+MIPS32_EMU = J(BASE_DIR, 'run_under_qemu_mips32')
+
+# Don't actually emit BASE_CC
+del BASE_CC
+
+shell_exports = [
+  'NACL_ROOT',
+  'MIPS32_CC',
+  'MIPS32_CXX',
+  'MIPS32_LD',
+  'MIPS32_LINKFLAGS',
+  'MIPS32_LIB_DIR',
+  'MIPS32_EMU'
+]
+
+# Store the values into a dict
+mips32_env = {}
+for k,v in dict(globals()).iteritems():
+  if k.startswith('_') or not isinstance(v, str):
+    continue
+  mips32_env[k] = v
+
+if __name__ == '__main__':
+  # Print the values out, for use in a shell script
+  for k,v in mips32_env.iteritems():
+    if k in shell_exports:
+      prefix = 'export '
+    else:
+      prefix = ''
+    print '%s%s="%s";' % (prefix,k,v)