cmake: make possible to build sel_ldr with 16K PageSize

Author: illwieckz

CMakeLists.txt

@@ -137,6 +137,7 @@ if (BUILD_NACL_HELPER_BOOTSTRAP)
 				"-DCMAKE_C_FLAGS=--target=${CLANG_TARGET}"
 				"-DCMAKE_CXX_FLAGS=--target=${CLANG_TARGET}"
 				"-DUSE_AMD64_ZERO_BASED_SANDBOX=${USE_AMD64_ZERO_BASED_SANDBOX}"
+				"-DUSE_ARMHF_16K_PAGESIZE=${USE_ARMHF_16K_PAGESIZE}"
 				-DBUILD_NACL_LOADER=OFF
 				-DBUILD_NACL_HELPER_BOOTSTRAP=ON
 			INSTALL_COMMAND "${CMAKE_COMMAND}" -E copy nacl_helper_bootstrap

cmake/NaClFlags.cmake

@@ -4,6 +4,10 @@ if (NOT MSVC)
 	option(USE_STATIC_LIBS "Tries to use static libs where possible." OFF)
 endif()
 
+if (ARCH_armhf)
+	option(USE_ARMHF_16K_PAGESIZE "Build armhf binaries with 16K PageSize." OFF)
+endif()
+
 macro(set_ASM_flag FLAG)
 	set(lang ASM)
 	if (${ARGC} GREATER 1)
@@ -93,6 +97,10 @@ if (USE_STATIC_LIBS)
 	set_linker_flag("-static")
 endif()
 
+if (USE_ARMHF_16K_PAGESIZE)
+	set_linker_flag("-Wl,-z,max-page-size=16384")
+endif()
+
 #TODO: Import from SetUpClang() from (root)/SConstruct.
 #TODO: This is mostly ASAN configurations.