add command-line arguments to mkbootimg to move kernel, ramdisk, etc.

Bug: 6918260
Change-Id: I5d4af6314fded027952941110a520dc9aa234a14

mkbootimg/mkbootimg.c

@@ -109,18 +109,17 @@ int main(int argc, char **argv)
     int fd;
     SHA_CTX ctx;
     uint8_t* sha;
+    unsigned base           = 0x10000000;
+    unsigned kernel_offset  = 0x00008000;
+    unsigned ramdisk_offset = 0x01000000;
+    unsigned second_offset  = 0x00f00000;
+    unsigned tags_offset    = 0x00000100;
 
     argc--;
     argv++;
 
     memset(&hdr, 0, sizeof(hdr));
 
-        /* default load addresses */
-    hdr.kernel_addr =  0x10008000;
-    hdr.ramdisk_addr = 0x11000000;
-    hdr.second_addr =  0x10F00000;
-    hdr.tags_addr =    0x10000100;
-
     while(argc > 0){
         char *arg = argv[0];
         char *val = argv[1];
@@ -140,11 +139,15 @@ int main(int argc, char **argv)
         } else if(!strcmp(arg, "--cmdline")) {
             cmdline = val;
         } else if(!strcmp(arg, "--base")) {
-            unsigned base = strtoul(val, 0, 16);
-            hdr.kernel_addr =  base + 0x00008000;
-            hdr.ramdisk_addr = base + 0x01000000;
-            hdr.second_addr =  base + 0x00F00000;
-            hdr.tags_addr =    base + 0x00000100;
+            base = strtoul(val, 0, 16);
+        } else if(!strcmp(arg, "--kernel_offset")) {
+            kernel_offset = strtoul(val, 0, 16);
+        } else if(!strcmp(arg, "--ramdisk_offset")) {
+            ramdisk_offset = strtoul(val, 0, 16);
+        } else if(!strcmp(arg, "--second_offset")) {
+            second_offset = strtoul(val, 0, 16);
+        } else if(!strcmp(arg, "--tags_offset")) {
+            tags_offset = strtoul(val, 0, 16);
         } else if(!strcmp(arg, "--board")) {
             board = val;
         } else if(!strcmp(arg,"--pagesize")) {
@@ -159,6 +162,10 @@ int main(int argc, char **argv)
     }
     hdr.page_size = pagesize;
 
+    hdr.kernel_addr =  base + kernel_offset;
+    hdr.ramdisk_addr = base + ramdisk_offset;
+    hdr.second_addr =  base + second_offset;
+    hdr.tags_addr =    base + tags_offset;
 
     if(bootimg == 0) {
         fprintf(stderr,"error: no output filename specified\n");