add a little tool

Makefile

@@ -1,7 +1,7 @@
 DATA = $(word 1,$(wildcard ./data ../data))
 include $(DATA)/Makefile.common
 
-BINS := check_sanity make_kernel_patchfile apply_patchfile sandboxc.c
+BINS := check_sanity make_kernel_patchfile apply_patchfile dump_range sandboxc.c
 all: .settings .data $(BINS)
 .data:
 	make -C $(DATA)
@@ -18,6 +18,8 @@ apply_patchfile: apply_patchfile.o $(DATA)/libdata.a
 	$(GCC) -o $@ $^ $(DATA)/libdata.a
 make_kernel_patchfile: make_kernel_patchfile.o sandboxc.o $(DATA)/libdata.a
 	$(GCC) -o $@ $^ $(DATA)/libdata.a
+dump_range: dump_range.o $(DATA)/libdata.a
+	$(GCC) -o $@ $^ $(DATA)/libdata.a
 
 clean:
 	rm -f $(BINS) *.o

apply_patchfile.c

@@ -52,7 +52,7 @@ int main(int argc, char **argv) {
                 goto retry;
             }
         } else {
-            printf("%s\n", name);
+            printf("%s (0x%x)\n", name, addr);
         }
 
         memcpy((char *) kernel.start + range_to_off_range((range_t) {&binary, addr, size}).start, stuff, size);

dump_range.c

@@ -0,0 +1,15 @@
+#include <data/common.h>
+#include <data/binary.h>
+
+int main(int argc, char **argv) {
+    if(argc != 4) {
+        fprintf(stderr, "Usage: dump_range binary start len\n");
+        return 1;
+    }
+    struct binary binary;
+    b_init(&binary);
+    b_load_macho(&binary, argv[1], false);
+    prange_t pr = rangeconv((range_t) {&binary, parse_hex_uint32(argv[2]), parse_hex_uint32(argv[3])});
+    write(1, pr.start, pr.size);
+    return 0;
+}