bootstage: Copy bootstage strings post-relocation

Any pointers to name strings that were passed to bootstage_mark_name()
pre-relocation should be copied post-relocation so that they don't get
trashed as the original location of U-Boot is re-used for other
purposes.

This change introduces a new API call that should be called from
board_init_r() after malloc has been initted on any board that uses
bootstage.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/common/bootstage.c b/common/bootstage.c
index a1e0939..15afa24 100644 (file)
--- a/common/bootstage.c
+++ b/common/bootstage.c
@@ -56,6 +56,21 @@ struct bootstage_hdr {
        uint32_t magic;         /* Unused */
 };
 
+int bootstage_relocate(void)
+{
+       int i;
+
+       /*
+        * Duplicate all strings.  They may point to an old location in the
+        * program .text section that can eventually get trashed.
+        */
+       for (i = 0; i < BOOTSTAGE_ID_COUNT; i++)
+               if (record[i].name)
+                       record[i].name = strdup(record[i].name);
+
+       return 0;
+}
+
 ulong bootstage_add_record(enum bootstage_id id, const char *name,
                           int flags, ulong mark)
 {

diff --git a/include/bootstage.h b/include/bootstage.h
index bdda768..c8235e8 100644 (file)
--- a/include/bootstage.h
+++ b/include/bootstage.h
@@ -237,6 +237,16 @@ void show_boot_progress(int val);
 /* This is the full bootstage implementation */
 
 /**
+ * Relocate existing bootstage records
+ *
+ * Call this after relocation has happened and after malloc has been initted.
+ * We need to copy any pointers in bootstage records that were added pre-
+ * relocation, since memory can be overritten later.
+ * @return Always returns 0, to indicate success
+ */
+int bootstage_relocate(void);
+
+/**
  * Add a new bootstage record
  *
  * @param id   Bootstage ID to use (ignored if flags & BOOTSTAGEF_ALLOC)
@@ -326,6 +336,11 @@ static inline ulong bootstage_add_record(enum bootstage_id id,
  * and won't even do that unless CONFIG_SHOW_BOOT_PROGRESS is defined
  */
 
+static inline int bootstage_relocate(void)
+{
+       return 0;
+}
+
 static inline ulong bootstage_mark(enum bootstage_id id)
 {
        show_boot_progress(id);