Support building on macOS/arm64

On Arm-based Macs, -no_pie is ignored and gives a linker warning.
Moreover, the build falls over with:

  ld: Absolute addressing not allowed in arm64 code but used in '_image_type_ptr_aisimage' referencing '_image_type_aisimage'

for dumpimage and mkimage, since we put data structs in text sections
not data sections and so cannot have dynamic relocations. Instead, move
the sections to __DATA and drop disabling PIE.

Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

Makefile

@@ -324,11 +324,6 @@ HOSTCC       = $(call os_x_before, 10, 5, "cc", "gcc")
 KBUILD_HOSTCFLAGS  += $(call os_x_before, 10, 4, "-traditional-cpp")
 KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
 
-# since Lion (10.7) ASLR is on by default, but we use linker generated lists
-# in some host tools which is a problem then ... so disable ASLR for these
-# tools
-KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie")
-
 # macOS Mojave (10.14.X) 
 # Undefined symbols for architecture x86_64: "_PyArg_ParseTuple"
 KBUILD_HOSTLDFLAGS += $(call os_x_after, 10, 14, "-lpython -dynamclib", "")

tools/imagetool.h

@@ -273,14 +273,14 @@ int rockchip_copy_image(int fd, struct image_tool_params *mparams);
 
 #define INIT_SECTION(name)  do {					\
 		unsigned long name ## _len;				\
-		char *__cat(pstart_, name) = getsectdata("__TEXT",	\
+		char *__cat(pstart_, name) = getsectdata("__DATA",	\
 			#name, &__cat(name, _len));			\
 		char *__cat(pstop_, name) = __cat(pstart_, name) +	\
 			__cat(name, _len);				\
 		__cat(__start_, name) = (void *)__cat(pstart_, name);	\
 		__cat(__stop_, name) = (void *)__cat(pstop_, name);	\
 	} while (0)
-#define SECTION(name)   __attribute__((section("__TEXT, " #name)))
+#define SECTION(name)   __attribute__((section("__DATA, " #name)))
 
 struct image_type_params **__start_image_type, **__stop_image_type;
 #else