PNaCl: Allow translator to produce an unsandboxed, native executable

pnacl/build.sh

 #!/bin/bash
 # 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.
 #
 #@                 PNaCl toolchain build script
 #@-------------------------------------------------------------------
 #@ This script builds the ARM and PNaCl untrusted toolchains.
 #@ It MUST be run from the native_client/ directory.
 ######################################################################
@@ skipping 2412 matching lines @@
   StepBanner "LIBS-SUPPORT"
   libs-support-newlib-crt1 portable
   libs-support-newlib-crt1 x86-64
   libs-support-bitcode portable
   libs-support-bitcode x86-64
 
   local arch
   for arch in arm x86-32 x86-64 mips32; do
     libs-support-native ${arch}
   done
+
+  libs-support-unsandboxed
 }
 
 libs-support-newlib-crt1() {
   local arch=$1
   setup-biased-bitcode-env ${arch}
   mkdir -p "${INSTALL_LIB}"
   spushd "${PNACL_SUPPORT}/bitcode"
 
   StepBanner "LIBS-SUPPORT-NEWLIB" \
              "Install crt1.x & crt1_for_eh.x (linker scripts)"
@@ skipping 77 matching lines @@
 
   # For ARM, also compile aeabi_read_tp.S
   if  [ ${arch} == arm ] ; then
     ${cc_cmd} -c aeabi_read_tp.S -o "${tmpdir}"/aeabi_read_tp.o
   fi
   spopd
 
   ${PNACL_AR} rc "${destdir}"/libcrt_platform.a "${tmpdir}"/*.o
 }
 
+libs-support-unsandboxed() {
+  if ${BUILD_PLATFORM_LINUX}; then
+    local arch=linux-x86-32
+    StepBanner "LIBS-SUPPORT (${arch})" "Install unsandboxed_irt.o"
+    local destdir="${INSTALL_LIB_NATIVE}"${arch}
+    mkdir -p ${destdir}
+    gcc -m32 -O2 -Wall -Werror -I${NACL_ROOT}/.. -DNACL_LINUX=1 -c \
+        ${PNACL_SUPPORT}/unsandboxed_irt.c -o ${destdir}/unsandboxed_irt.o
+  fi
+}
+
 
 # Build the dummy "libpnacl_irt_shim.a", which is useful for building
 # commandline programs.  It cannot be used to build PPAPI programs
 # because it does not actually shim the PPAPI interfaces.
 # The library is named the same as the real PPAPI shim to ensure that
 # the commandlines are the same.
 # This must be built after newlib(), since it uses headers like <stdint.h>.
 dummy-irt-shim() {
   local arch=$1
   local destdir="${INSTALL_LIB_NATIVE}"${arch}
@@ skipping 845 matching lines @@
 
 if [ "$(type -t $1)" != "function" ]; then
   #Usage
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 fi
 
 "$@"