hosted: sanitize handling of HOME_DIR

 * HOME_DIR is now either "/" or special "<HOME>"
   * target-specific "home dir path" is defined solely by PIVOT_ROOT
 * PIVOT_ROOT path is now defined in toplevel config files
 * Make Samsung YP-R0/R1 and SONY_NWZ use PIVOT_ROOT too
 * Do not prepend PIVOT_ROOT path if the path already has it!
 * Do not play these games for __PCTOOL__ builds

Change-Id: I3d51ad902a5f9cafe45ba15ba654f30f1ec6113a

1 files changed, 7 insertions, 1 deletions

diff --git a/firmware/target/hosted/rolo.c b/firmware/target/hosted/rolo.c
index 432d69c86e..2aa3071c9a 100644
--- a/firmware/target/hosted/rolo.c
+++ b/firmware/target/hosted/rolo.c
@@ -91,8 +91,14 @@ int rolo_load(const char* filename)
     lcd_remote_update();
 #endif
 
+#ifdef PIVOT_ROOT
+#define EXECDIR PIVOT_ROOT
+#else
+#define EXECDIR ROOT_DIR
+#endif
+
     char buf[256];
-    snprintf(buf, sizeof(buf), "%s/%s", HOME_DIR, filename);
+    snprintf(buf, sizeof(buf), "%s/%s", EXECDIR, filename);
     execl(buf, BOOTFILE, NULL);
 
     rolo_error("Failed to launch!", strerror(errno));